JP2006015598A - Centrifugal molding machine and molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a centrifugal molding machine capable of easily forming a fine shape on a molded product, and a molded product having a fine shape formed on the surface by a centrifugal molding method.
A centrifugal molding machine 100 performs molding by pressing a molding object 104 in a plasticized state against a molding surface of a mold 101 by centrifugal force generated by rotating the mold 101. A mold 103 having fine irregularities on the surface is fixed to the inner peripheral surface of the rotary drum 102 of 101, and the molding 104 is pressed against the surface of the mold 103 by the centrifugal force generated by the rotation of the mold 101. Is done.
[Selection] Figure 1

Description

  The present invention relates to a centrifugal molding machine and a molded product thereof.

  Centrifugal molding is a method of molding a molded product by placing a molded object such as plasticized resin in a mold and pressing the molded object against the inner surface of the mold using centrifugal force generated by rotating the mold. To do. According to such a centrifugal molding method, there are advantages that a seamless cylindrical shape can be formed, and that a uniform shape can be molded without using high-pressure air or a hydraulic press.

Conventionally, with respect to the centrifugal molding method having such advantages, for example, a method of injecting a resin material into a cylindrical mold and rotating the mold to create a seamless belt with less uneven thickness (for example, Patent Document 1) discloses a method of molding a contact lens by casting a monomer material, which is a raw material, into a mold having a recess, and curing it by irradiating ultraviolet light while rotating (for example, patents) Reference 2).
JP 2001-293735 A Japanese Patent No. 3249123

  However, as described in Patent Documents 1 and 2, according to the conventional centrifugal molding method, only a simple shape such as a belt or a lens can be molded.

  An object of the present invention is to provide a centrifugal molding machine capable of easily forming a fine shape on a molded product, and a molded product having a fine shape formed on the surface by a centrifugal molding method.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a molded article in a plasticized state is pressed against a molding surface of the mold by a centrifugal force generated by rotating the mold. The centrifugal molding machine is characterized in that the molding surface has a fine shape, and the molding object is pressed against the molding surface by centrifugal force generated by the rotation of the mold, and is molded.

  In the invention according to the first aspect, the molding object in a plasticized state is pressed against the molding surface having a fine shape by the centrifugal force generated by the rotation of the mold, and the fine shape is transferred. . Thereby, the molding in which the fine shape was formed in the surface by the side of the above-mentioned molding side can be obtained. Here, in this specification, the fine shape means a protrusion formed on the surface of the molded product, a hole formed on the surface of the molded product, or an uneven shape on the surface of the molded product.

  According to a second aspect of the present invention, the centrifugal molding machine according to the first aspect includes a mold in which a fine shape is formed on one side, and the mold is pressed against the molding surface by the rotation of the mold. The one surface side of the mold is pressed against the plastic material in a plasticized state by a centrifugal force generated by rotating the mold. It is characterized by being able to.

  In the invention according to claim 2, the surface opposite to the molding surface side of the molding object which is pressed against the molding surface of the mold and the fine shape is transferred to the molding surface side surface. The mold is placed on the top. Thereafter, the mold is rotated, and one side of the mold is pressed against the molded object in the plasticized state by centrifugal force due to the rotation of the mold, and the fine shape formed on this one side is applied to the molded object. Transcribed. Thereby, it is possible to obtain a molded product in which a fine shape is formed not only on the surface on the molding surface side but also on the surface opposite to the molding surface.

  The invention according to claim 3 is a centrifugal molding machine that performs molding by pressing a molding object in a plasticized state against a molding surface of the mold by centrifugal force generated by rotating the mold. A mold having a fine shape formed on one side thereof, and the mold is disposed with the one side facing the surface of a molding object that is pressed against the molding surface by rotation of the mold. The one surface side is pressed against the molded object in the plasticized state by a centrifugal force generated by rotating the mold.

  In the invention described in claim 3, the plasticized article is pressed against the molding surface of the mold by the centrifugal force generated by the rotation of the mold. And, by the centrifugal force generated by placing the mold on the surface opposite to the molding surface side of the molding object in a state pressed against the molding surface of the mold, and rotating the mold, One surface side of the mold on which the fine shape is formed is pressed against the molding object in a plasticized state, and the fine shape is transferred. Thereby, the molding in which the fine shape was formed in the surface on the opposite side to the said molding surface side can be obtained.

  According to a fourth aspect of the present invention, the mold is pressed by pressing a molded object in a plasticized state against a molding surface of the mold having a fine shape by centrifugal force generated by rotating the mold. A fine shape is formed on the surface on the molding surface side.

  In the invention according to the fourth aspect, a molded product in which a fine shape is formed on the surface on the molding surface side can be easily molded by a centrifugal molding method.

  The invention according to claim 5 is the molding surface obtained by pressing a molding object in a plasticized state against a molding surface of the mold having a fine shape by a centrifugal force generated by rotating the mold. A fine shape is formed on the side surface, and a fine shape is formed by centrifugal force generated by placing the mold on the surface of the molding object pressed against the molding surface and rotating the mold. By pressing one surface of the mold against the plasticized object, a fine shape is formed on the surface opposite to the molding surface.

  In the invention according to claim 5, it is possible to easily mold a molded product in which fine shapes are formed on both the surface on the molding surface side and the surface on the opposite side by a centrifugal molding method. it can.

  According to the sixth aspect of the present invention, an object to be molded that is plasticized by centrifugal force generated by rotating the mold is pressed against the molding surface of the mold, and the object to be pressed is pressed against the molding surface. After placing the mold on the surface of the molded product, by pressing the one surface side of the mold having a fine shape against the molded product in the plasticized state by centrifugal force generated by rotating the mold A fine shape is formed on the surface opposite to the molding surface.

  In the invention according to the sixth aspect, a molded product in which a fine shape is formed on the surface opposite to the molding surface can be easily molded by a centrifugal molding method.

  According to the present invention, the characteristics of the centrifugal molding method, that is, the characteristics that it is possible to form a seamless tubular structure, and that the resin can be molded by applying a uniform pressure without using a hydraulic press or the like. The effect that a fine uneven | corrugated shape can be easily formed on a molded article is acquired, utilizing a characteristic. Further, since the pressure is uniformly applied to the object to be molded by the centrifugal molding method, an effect that a fine uneven shape can be formed with high accuracy is obtained.

Hereinafter, the centrifugal molding machine of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing the main part of the centrifugal molding machine according to the first embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view showing a state when the mold is rotated from the state shown in FIG. It is.

  In the figure, the centrifugal molding machine 100 of this example includes a mold 101. The mold 101 is fixed to a cylindrical rotary drum 102 configured to be rotatable by a rotating means (not shown) and an inner peripheral surface of the rotary drum 102 (a molding surface in the mold 101), and has a fine surface. And a mold 103 having an uneven shape. Thereby, the molding surface of the mold 101 has a fine uneven shape. However, the mold 101 may be configured by directly forming the fine uneven shape on the inner peripheral surface of the rotating drum 102.

  A molding object 104 is supplied to the mold 101 to perform centrifugal molding. Explaining in detail each configuration of the mold 101, the rotating drum 102 of the mold 101 needs to have sufficient rigidity to withstand the centrifugal force generated during molding and stability not to react with the workpiece 104 during molding. Examples of the material having such properties include materials such as steel, stainless steel, and aluminum alloy. In addition, the material of the rotating drum 102 only needs to be a material that is less likely to be deformed than the molding 104, and an organic resin, metal, semiconductor, carbon-based material, oxide, or the like depending on the material of the molding 104. , Nitrides, dielectrics, insulators, piezoelectrics and other inorganic substances, or a mixture thereof.

  The rotating drum 102 is preferably formed in a cylindrical shape around the rotation center where the mold 103 can be arranged without deviation. As a result, the centrifugal force applied to the workpiece 104 during rotation of the rotating drum 102 becomes the same value at any location on the surface of the mold 103, and can be molded with high accuracy.

  The rotating means for rotating the rotating drum 102 is composed of a driving mechanism (not shown) connected from the inside of the centrifugal molding machine 100 or from the outside (the same applies to other embodiments below). The speed is determined by the physical properties of the workpiece 104 and the shape and material of the rotating drum 102. The speed can be defined as 30 rpm to 30000 rpm. More preferably, it is 50 rpm to 10,000 rpm. The force applied to the object 104 in the mold 101 is supplemented by mechanical force from a press mechanism (not shown) or a roller mechanism (not shown) in addition to centrifugal force, or the rotating drum 102. Addition of hydrostatic pressure of high pressure fluid to the vicinity can be applied.

  The mold 103 is separate from the rotating drum 102 in this example, and is detachably fixed by fixing means (not shown) formed on the inner surface of the rotating drum 102. And since the mold 103 can be removed from the rotating drum 102 and replaced, the mold 103 having a desired uneven shape can be installed. However, the mold 103 may be integrated with the rotating drum 102.

  The material of the mold 103 is, for example, a resin typified by a thermosetting resin, a thermoplastic resin, a photocurable resin, a metal, a semiconductor, a carbon-based material, an oxide, a nitride, a dielectric, an insulator, or a piezoelectric. Any one of inorganic substances such as a body, or a mixture thereof is determined in consideration of the strength required for molding and the workability of required accuracy. In order to prevent reaction with the object 104 during molding, it is preferable to appropriately perform surface strengthening treatment such as formation of a fluorine-based release layer, carburizing treatment, nitriding treatment, and diamond-like carbon layer on the mold 103. . Further, as will be described later, when molding is used as a curing means for the molding object 104 during molding, the mold 103 is preferably made of a transparent material such as quartz, glass, or light-transmitting resin. The shape of the mold 103 is formed in accordance with the shape of the cylindrical rotary drum 102. However, if the mold 103 is formed of a flexible material such as a metal foil or an organic resin thin film, the shape of the mold 103 is adjusted to the shape of the rotary drum 102. It is easy and preferable.

  The fine uneven shape on the surface of the mold 103 can form the same shape on the entire surface, but a shape having a distribution other than uniform can also be formed. The method for forming such a fine uneven shape on the mold 103 is not particularly limited. For example, it is selected according to desired processing accuracy such as photolithography or electron beam drawing. The fine concavo-convex shape of the mold 103 is formed such that the width or height of the convex portion or the concave portion is at least 1 nm and not more than 100 μm.

  Next, the molding object 104 supplied to the inner surface of the mold 101 (the surface of the mold 103) will be described. The molding object 104 includes a thermosetting resin, a thermoplastic resin, a photocurable resin, and a high viscosity resin. Or any one of inorganic materials such as metals, semiconductors, carbon-based materials, oxides, nitrides, dielectrics, insulators, and piezoelectrics, or a mixture thereof. The molding object 104 needs to be plasticized when it is supplied into the mold 101 and molded. As the method, at the time of supply to the mold 101, the molding object 104 can be supplied in a solid form and dissolved by heating in the mold 101. For example, a pre-molten form, monomer or oligomer can be used. More preferably, it is supplied in an already plasticized form such as a form, a form dissolved in an appropriate solvent such as water or an organic solvent, a form of powder, a form of sol.

  If the centrifugal molding machine 100 includes means for supplying the molding object 104 such as a dispenser, a spray, or a vapor deposition source (not shown), the operation can be automated, which is more preferable (the same applies to other embodiments). ).

  The object to be molded 104 in the mold 101 is pressed against the surface of the mold 103 by rotating the rotating drum 102 and is pressed against the surface of the mold 103 to be uniformly centrifugally formed on the molding surface of the mold 101 over the entire circumference. (Fig. 2). Then, the molded object 104 is cured by using cooling, compression, molecular crosslinking, thermal polymerization, photopolymerization, or solvent volatilization according to the material, thereby forming a cylindrical molded object. Can get to. On the outer peripheral surface of this molded product (the surface on the molding surface side of the mold 101), the fine uneven shape on the surface of the mold 103 is transferred.

  According to the centrifugal molding machine 100 of this example, a cylindrical molded product in which a fine uneven shape having a minimum width or height of a convex portion or a concave portion of 1 nm to 100 μm is formed on the outer peripheral surface. It can be formed easily, and an uneven shape can be formed with high accuracy.

  Next, based on FIG. 3 thru | or FIG. 5, 2nd embodiment of this invention is described. 3 is a schematic cross-sectional view showing the main part of the centrifugal molding machine according to the second embodiment of the present invention, FIG. 4 is a schematic cross-sectional view showing a state when the rotating drum is rotated from the state shown in FIG. FIG. 5 is a schematic cross-sectional view showing a state when a mold is disposed on a workpiece from the state shown in FIG. 4. In these drawings, the same members as those in the first embodiment are denoted by the same reference numerals.

  In the figure, a mold 201 in the centrifugal molding machine 200 of this example is configured to include a rotating drum 102 and a mold 202 (the mold 202 is not shown in FIGS. 3 and 4). The inner surface of the rotating drum 102 constitutes a molding surface, and the plasticized workpiece 104 supplied into the rotating drum 102 is subjected to centrifugal force due to the rotation of the rotating drum 102 as shown in FIG. It is pressed against the molding surface and molded into a cylindrical shape.

  Then, when the molding object 104 is in a plasticized state on the inner peripheral surface (surface opposite to the molding surface side of the mold 201) of the molding object 104 molded in a cylindrical shape in this way. In addition, four molds 202 are arranged. The mold 202 is formed in a circular arc shape so as to follow the inner peripheral surface of the workpiece 104, and a fine uneven shape is formed on the outer surface (one surface side). Similar to the mold 103 of the first embodiment, the fine concavo-convex shape is formed such that the width or height of the convex portion or the concave portion is at least 1 nm and not more than 100 μm. In addition, although the fine uneven shape can form the same shape on the entire surface, it can also form a shape having a distribution other than uniform, and the method of forming the shape is not particularly limited. It is the same as the mold 103 of one embodiment. Further, the material and surface treatment of the mold 202 are the same as those of the mold 103 of the first embodiment.

  In this example, such a mold 202 is arranged on a cylindrical workpiece 104 in a plasticized state with its outer surface facing, and then the rotating drum 102 is rotated again to apply centrifugal force to the mold 202. The outer surface of the mold 202 is pressed against the inner peripheral surface of the molding object 104 and pressed uniformly, and then the molding object 104 is cured to obtain a cylindrical molding. . A fine uneven shape on the surface of the mold 202 is transferred to the inner peripheral surface of the molded product thus obtained.

  According to the centrifugal molding machine 200 of this example, a cylindrical molded product in which a fine uneven shape having a minimum width or height of a convex portion or a concave portion of 1 nm to 100 μm is formed on the inner peripheral surface. Can be easily formed, and an uneven shape can be formed with high accuracy.

  Next, based on FIG. 6 thru | or FIG. 8, 3rd embodiment of this invention is described. 6 is a schematic cross-sectional view showing the main part of the centrifugal molding machine according to the third embodiment of the present invention, FIG. 7 is a schematic cross-sectional view showing a state when the mold is rotated from the state shown in FIG. FIG. 8 is a schematic cross-sectional view showing a state when a mold is arranged on the workpiece from the state shown in FIG. 7. In these drawings, the same members as those in the first embodiment are denoted by the same reference numerals.

  In the figure, a mold 301 in the centrifugal molding machine 300 of this example is configured to include a rotary drum 102 and a first mold 302 and a second mold 303 having fine irregularities on the surface (FIGS. 6 and 7). The second mold 303 is not shown in FIG. The first mold 302 is detachably fixed to the inner peripheral surface of the rotary drum 102 by a fixing means (not shown) in the same manner as the mold 103 of the first embodiment. The surface has a fine uneven shape. However, as in the first embodiment, the fine uneven shape may be directly formed on the inner peripheral surface of the rotating drum 102.

  The first mold 302 is separate from the rotating drum 102 and has the same configuration as the mold 103 of the first embodiment.

  A plasticized molding object 104 is supplied onto the first mold 302 in the rotating drum 102, and centrifugal force acts on the molding object 104 by the rotation of the rotating drum 102. Then, it is pressed against the surface of the first mold 302 and is uniformly centrifugally molded over the entire circumference of the molding surface of the mold 301 so as to be molded into a cylindrical shape. Thereby, the fine uneven shape of the surface of the first mold 302 is transferred to the outer peripheral surface of the cylindrical workpiece 104.

  In this way, on the inner peripheral surface (surface) of the molding object 104 molded in a cylindrical shape on the inner peripheral surface of the mold 301, when the molding object 104 is in a plasticized state, The two molds 303 are arranged with the outer surface thereof facing. The second mold 303 has the same configuration as the mold 202 of the second embodiment.

  In this example, after placing such a second mold 303 on the cylindrical workpiece 104 in a plasticized state, the rotary drum 102 is rotated again, and centrifugal force is applied to the second mold 303. After the outer surface of the second mold 303 is pressed against the inner peripheral surface of the molding 104 and pressed uniformly, the molding 104 can be cured to obtain a cylindrical molding. In the molded product thus obtained, fine irregularities on the surfaces of the first mold 302 and the second mold 303 are transferred to both the outer peripheral surface and the inner peripheral surface.

According to the centrifugal molding machine 300 of this example, a cylindrical shape in which a fine uneven shape having a minimum width or height of a convex portion or a concave portion of 1 nm to 100 μm is formed on the outer peripheral surface and the inner peripheral surface. In addition, in the first to third embodiments, the shape of the rotating drum 102 is not limited to a cylindrical shape. For example, the rotating drum 102 may be formed in a prismatic shape having a hollow portion (not shown). The mold disposed inside the rotating drum formed in the shape of a prism as described above is formed in a flat plate shape so as to be disposed along the plate surface of the rotating drum. Then, the rotating drum has a regular polygonal prism shape having a hollow portion, and the centrifugal force acting on each mold is equalized by equalizing the distance from the rotation center of the rotating drum to each mold disposed inside the rotating drum. , Can be accurately molded.

  Next, based on FIG. 9 and FIG. 10, 4th embodiment of this invention is described. FIG. 9 is a schematic sectional view showing the main part of the centrifugal molding machine according to the fourth embodiment of the present invention, and FIG. 10 is a schematic sectional view showing a state when the mold is rotated from the state shown in FIG. However, these schematic cross-sectional views show only the cross-sectional portion, and the depth is omitted.

  In the figure, the centrifugal molding machine 400 of this example is provided with a mold 401, and this mold 401 is provided on a spin cast mold 402 and an inner surface of the spin cast mold 402 (molded surface in the mold 401). The mold 403 is fixed and has a fine uneven shape on the surface. Thereby, the molding surface in the metal mold | die 401 has fine uneven | corrugated shape. However, the mold 401 may be configured by directly forming the fine uneven shape on the inner surface of the spin cast mold 402.

  The mold 401 is supplied with the workpiece 104 and is subjected to centrifugal molding. The components of the mold 401 will be described in detail. A spin cast mold 402 of the mold 401 has a hexagonal bottom plate 402a at the bottom, and rises at a predetermined angle from each peripheral edge of the bottom plate 402a. And a single trapezoidal side plate 402b (only two are shown in the figure). Adjacent side plates 402b are joined to each other, and the spin cast mold 402 is formed in a bowl-shaped truncated pyramid shape.

  The spin cast die 402 is rotated by a rotating shaft 404 provided on the bottom plate 402a. The spin cast die 402 is formed of a material having sufficient rigidity to withstand centrifugal force, like the rotary drum 102 in each of the above embodiments.

  The rotational speed of the spin cast mold 402 is determined by its shape and material. Specifically, like the rotating drum 102 of each of the above embodiments, it can be defined as 30 rpm to 30000 rpm, and more preferably 50 rpm to 10000 rpm. Further, as in the above embodiments, the force applied to the workpiece 104 in the mold 401 is mechanical force from a press mechanism (not shown) or a roller mechanism (not shown) in addition to centrifugal force. Or addition of hydrostatic pressure of a high-pressure fluid near the spin cast mold 402 can be added.

  The mold 403 is detachably fixed to the inner surface of each side plate 402b of the spin cast die 402 by fixing means (not shown). However, the mold 403 may be integrated with the spin cast mold 402. The mold 403 is formed in a flat plate shape, but the material, the surface treatment, the size of the fine uneven shape, and the form and method of forming the uneven shape are the same as those in the above embodiments.

  In the mold 401, the plasticized workpiece 104 is supplied to the bottom plate 402 a of the spin cast mold 402. The object to be molded 104 is pressed against the surface of the mold 403 by rotating the spin cast mold 402 with the rotating shaft 404 and is uniformly centrifugally molded over the entire molding surface of the mold 401. (FIG. 10). After that, the molding object 104 is cured to obtain a bowl-shaped truncated pyramid shaped molding. On the outer surface of the molded product, a fine uneven shape on the surface of the mold 403 is transferred.

  According to the centrifugal molding machine 400 of this example, the bowl-shaped truncated pyramid shape in which the fine irregular shape having the minimum width or height of the convex portion or concave portion of 1 nm to 100 μm is formed on the outer surface. The molded product can be easily formed, and the uneven shape can be formed with high accuracy.

  Next, based on FIG. 11 thru | or FIG. 13, 5th embodiment of this invention is described. 11 is a schematic cross-sectional view showing the main part of the centrifugal molding machine in the fifth embodiment of the present invention, FIG. 12 is a schematic cross-sectional view showing a state when the spin cast mold is rotated from the state shown in FIG. FIG. 13 is a schematic cross-sectional view showing a state when a mold is arranged on the molding object from the state shown in FIG. However, these schematic cross-sectional views show only the cross-sectional portion, and the depth is omitted. Further, in these drawings, the same members as those in the above embodiments are denoted by the same reference numerals.

  In the figure, a mold 501 in the centrifugal molding machine 500 of this example is configured to include a spin cast mold 402 and a mold 502 having a fine uneven shape on one side (FIG. 11 and FIG. Is not shown). The inner surface of the spin cast mold 402 constitutes a molding surface, and the plasticized workpiece 104 supplied to the bottom plate 402 a in the spin cast mold 402 is subjected to centrifugal force due to the rotation of the spin cast mold 402. Thus, as shown in FIG. 12, it is pressed against the molding surface and molded into a bowl-shaped truncated pyramid shape.

  Then, on the inner surface of the molded object 104 molded in this way, when the molded object 104 is in a plasticized state, a flat mold 502 is arranged facing the one surface side. It has become. One mold 502 is arranged for each side plate 402b. The mold 502 is formed in a flat plate shape, but the material and surface treatment, the size of the fine uneven shape, and the form and method of forming the uneven shape are the same as those in the above embodiments.

  In this example, after placing the mold 502 on the molding object 104 molded on the molding surface of the mold 501 and plasticized, the spin cast mold 402 is rotated again and the mold 502 is centrifuged. A force is applied to press one side of the mold 502 against the inner peripheral surface of the molding 104 and press it uniformly, and then the molding 104 is cured to obtain a bowl-shaped truncated pyramid shaped molding. It is like that. The fine irregularities on the surface of the mold 502 are transferred to the inner surface of the molded product thus obtained.

  According to the centrifugal molding machine 500 of this example, a bowl-shaped truncated pyramid shape in which a fine irregular shape having a minimum width or height of a convex portion or a concave portion of 1 nm to 100 μm is formed on the inner surface. A molded product can be easily formed, and an uneven shape can be formed with high accuracy.

  Next, based on FIG. 14 thru | or FIG. 16, 6th embodiment of this invention is described. FIG. 14 is a schematic cross-sectional view showing the main part of the centrifugal molding machine in the sixth embodiment of the present invention, FIG. 15 is a schematic cross-sectional view showing a state when the mold is rotated from the state shown in FIG. FIG. 16 is a schematic cross-sectional view showing a state when a mold is arranged on the workpiece from the state shown in FIG. 15. However, these schematic cross-sectional views show only the cross-sectional portion, and the depth is omitted. Further, in these drawings, the same members as those in the above embodiments are denoted by the same reference numerals.

In the figure, a mold 601 in the centrifugal molding machine 600 of the present example is configured to include a spin cast mold 402 and a first mold 602 and a second mold 603 having fine irregularities on the surface (FIGS. 14 and 14). FIG. 15 does not show the second mold 603). The first mold 602 is fixed to the inner surface of each side wall 402b of the spin cast die 402 by fixing means (not shown) in the same manner as the mold 403 of the fourth embodiment. The molding surface 601 has a fine uneven shape. However, as in the first embodiment, the fine uneven shape may be directly formed on the inner peripheral surface of the spin cast mold 402.
The first mold 602 has the same configuration as the mold 403 of the fourth embodiment.

  In the mold 601, as in the fourth embodiment, the plasticized molded object 104 is supplied to the bottom plate 402 a of the spin cast mold 402. By the rotation of the casting mold 402, a centrifugal force acts and is pressed against the surface of the first mold 602 and is uniformly centrifugally formed over the entire molding surface of the mold 601 to form a bowl-shaped pyramid shape. It is like that. Thereby, the fine uneven shape of the surface of the first mold 602 is transferred to the outer surface of the molding object 104.

  When the molding object 104 is in a plasticized state, the inner surface of the molding object 104 molded on the inner peripheral surface of the mold 601 is the same as the mold 502 of the fifth embodiment. The second mold 603 is arranged. The second mold 603 has the same configuration as the mold 502 of the fifth embodiment.

  In this example, after placing such a second mold 603 on the cylindrical workpiece 104 in a plasticized state, the spin cast die 402 is rotated again, and centrifugal force acts on the second mold 603. Then, after pressing one side of the second mold 603 against the inner surface of the molding 104 and pressing it uniformly, the molding 104 is cured to obtain a bowl-shaped truncated pyramid shaped molding. It has become. In the molded product thus obtained, fine irregularities on the surfaces of the first mold 602 and the second mold 603 are transferred to both the outer surface and the inner surface.

  According to the centrifugal molding machine 600 of this example, the bowl-shaped pyramid in which the fine irregularities having the minimum width or height of the convex portions or concave portions of 1 nm to 100 μm are formed on the outer surface and the inner surface. A trapezoidal molded product can be easily formed, and an uneven shape can be formed with high accuracy.

  In the fourth to sixth embodiments, the shape of the spin cast mold 402 is preferably a shape having the center of rotation as a central axis that is a substantially vertical direction. At this time, the spin cast mold 402 has a shape in which the radius increases upward, that is, the taper angle that is an angle formed by the bottom plate 402a and the side plate 402b of the spin cast mold 402 is larger than 0 degree and smaller than 90 degrees. If it exists, it is preferable that the workpiece 104 easily follows the shape of the mold.

  In addition, a structure that prevents the molding object 104 from being scattered outside the mold by centrifugal force can be formed on the uppermost part of the spin cast mold 402.

  In each of the embodiments described above, heat is often required for plasticizing or curing the molding object 104. For this reason, the centrifugal molding machine of each embodiment is represented by resistance heating, reaction heat, heating by circulation of a heating medium, heating by a Peltier element, heating by electromagnetic radiation such as ultraviolet rays, visible light, infrared rays, and microwaves. It is preferable to have a heating mechanism. Similarly, if there is a cooling mechanism represented by cooling of a heat medium such as forced air cooling or water cooling mechanism or cooling by a Peltier element, the process time can be shortened. Moreover, when using a photocurable resin as the to-be-molded object 104, it is necessary to arrange | position a light source according to the material of the to-be-molded object 104 inside or near each centrifugal molding machine. In addition, the precision of fine structure formation can be increased by arranging a mold in a chamber that is evacuated by a diaphragm pump, an oil rotary pump, a dry pump, a diffusion pump, a turbo molecular pump, or the like (not shown).

  Further, in each of the above-described embodiments, the rotary drum 102 or the spin cast mold 402, a mechanism for dividing the mold into two or more, the rotary drum 102 or the spin cast mold, in order to take out the molding object 104 that has been cured after molding. A mechanism for sending a fluid such as air between the mold 402 and the mold and the molding 104, or a mechanism for mechanically holding a part of the molding 104 and pulling it away from the rotary drum 102 or the spin cast mold 402 and the mold. If a peeling mechanism such as the above is provided, an accurate molded object 104 can be obtained.

  According to each of the above embodiments, the molding object 104 reflecting the mold and the mold shape can be obtained. This molded object 104 is processed as necessary, such as cutting, adhesion, winding, surface treatment such as hydrophilization, hydrophobization, functional group introduction, etching, polishing, metal, organic substance, inorganic substance, dielectric, insulation After being subjected to a post-treatment represented by film formation of a body, an electric conductor, etc., it is used for each application described later.

  In each of the above embodiments, the fine uneven shape is described as an example of the fine shape in the claims, but the fine uneven shape may be a fine protrusion, a fine hole, or the like. .

  Hereinafter, the present invention will be described in more detail by way of examples.

First, Example 1 of the present invention will be described. FIG. 17 is a schematic perspective view showing the main part of the rotating drum centrifugal molding machine of the first embodiment.
The mold 1001 in the rotary drum centrifugal molding machine 1000 of the present example shown in the figure includes a regular hexagonal columnar rotary drum 1002 having a hollow portion and fine irregularities on the surface fixed to the inner surface of each side wall of the rotary drum 1002. And a mold 1003 having a shape.

  The rotating drum 1002 is a regular hexagonal column whose side wall has an inner surface of 10 cm on a side and a height of 10 cm (in the drawing, the height is made longer for convenience of explanation), and each side of the 10 cm square in the rotating drum 1002. The mold 1003 made of square Ni plating having a side of 10 cm and a thickness of 0.5 mm, each having a uniform hole having a diameter of 1 μm and a depth of 1 μm, is fixed to the wall surface. The rotating drum 1002 can be rotated together with the mold 1003 by a rotating shaft 1004 constituting rotating means. The rotating drum 1002 can be adjusted to an appropriate temperature for each process by temperature control means 1005 using a circulating heat medium such as water or silicone oil. The mold 1001 is arranged in a chamber (not shown) that can be in a vacuum atmosphere, and can be evacuated to a pressure of 10 Pascals by a dry pump.

  FIG. 18 shows a centrifugal molding process using the rotating drum centrifugal molding machine 1000 of this example. First, as shown in FIG. 18A, the mold 1003 is fixed to the inner surface of the rotary drum 1002. Next, as shown in FIG. 18B, a molding object 1002 that is a thermoplastic resin is placed in the rotating drum 1002, and the rotating drum 1002 and the mold 1003 are heated to a high temperature by the temperature control means 1005. The object 1006 in 1002 is plasticized. Next, as shown in FIG. 18C, the rotating drum 1002 is rotated by the rotating shaft 1004, and the plasticized object 1006 is pressed against the mold 103 by the generated centrifugal force. Next, as shown in FIG. 18D, the rotary drum 1002 and the mold 1003 are cooled by the temperature adjusting means 1005 while rotating the rotary drum 1002, so that the molded object 1006 is formed into a prismatic cured product 1007. . Then, as shown in FIG. 18E, the cured molded product 1007 is peeled from the rotary drum 1002 and the mold 1003. Thereafter, as shown in FIG. 18F, the cured molded product 1007 is cut into a molded product 1008 as necessary.

  In Example 1, the configuration of the mold 1001 is made to correspond to the configuration of the first embodiment, but may be made to correspond to the configuration of the mold of the second and third embodiments. That is, the mold 1003 is not fixed to the rotary drum 1002, and the mold 1003 is disposed on the inner surface of the molding after centrifugal molding, and the mold 1003 is subjected to centrifugal force to mold the mold 1003 on the inner surface of the molding 1006. A fine uneven shape of 1003 may be transferred. Further, after centrifugal molding is performed by a rotating drum 1002 shown in the figure, to which the mold 1003 is fixed, the mold 1003 is disposed on the inner surface of the molding object, and centrifugal force is applied to the mold 1003 to apply the inner and outer surfaces of the molding object 1006. You may transfer the fine uneven | corrugated shape of the mold 1003 to both surfaces.

  Next, Example 2 will be described. In Example 2, an example of creating a hexagonal columnar molded product having a fine uneven shape on the outer surface, which is created using the rotary drum centrifugal molding machine 1000 of Example 1, is shown.

  PMMA (polymethyl methacrylate) was used for the molding object 1006. A 0.75 kilogram molded object 1006 previously heated to 240 ° C. and plasticized is rotated at 10 rpm and supplied into a rotating drum 1002 whose temperature is maintained at 150 ° C., and then the rotational speed is increased to 6000 rpm. Hold for a minute. Thereafter, the temperature of the rotating drum 1002 is lowered to 80 ° C. (14 ° C./min) over 5 minutes while continuing the rotation, the rotation is stopped and the rotating drum 1002 is opened, and a fine uneven shape is formed on the outer surface. Product 1007 was obtained. As a result, a hexagonal columnar molded product 1007 having microprojections formed on the outer surface was obtained.

  One side of the microprojections formed on each side surface of the hexagonal columnar molded product 1007 is 1 μm, the height is 1 μm, and they are arranged with a period (pitch) of 2 μm. With such a fine structure, the light reflectance, water repellency, and the like on the surface of the molded product 1007 can be changed, and a prismatic structure having specific surface properties can be formed.

Next, Example 3 will be described. FIG. 19 is a schematic perspective view showing a main part of the spin cast centrifugal molding machine of the third embodiment.
The mold 3001 in the spin cast type centrifugal molding machine 3000 of the present example shown in the figure includes a spin cast mold 3002, a first mold 3003, and a second mold 3004 (see FIG. 19). (The second mold is not shown). The spin cast mold 3002 is composed of a regular hexagonal bottom plate 3002a and six trapezoidal side plates 3002b rising from each peripheral edge of the bottom plate 3002a. The bottom plate 3002a is a regular hexagon having a side of 12 cm, and the side plate 3002b is a trapezoid having a lower side of 12 cm, an upper side of 24 cm, and a height of 12 cm. The inclination angles of the side plates 3002b with respect to the horizontal plane are all 45 degrees. The joining surfaces of the bottom plate 3002a, the side plate 3002b, and the side plates 3002b are smoothly joined so that the radius of curvature is 1 cm or more. The plastic cast object 3006 is supplied to the spin cast mold 3002 through the supply means 3005.

  First molds 3003 are fixed to the side plates 3002b of the spin cast mold 3002, respectively. The first mold 3003 is made of a square Ni plating having a side of 10 cm and a thickness of 0.5 mm, which has uniformly holes having a diameter of 1 μm and a depth of 1 μm. Then, on the workpiece 3006 after the centrifugal molding, as in the first mold 3003, a square Ni-plated second mold having a side of 10 cm and a thickness of 2 mm having uniformly a hole having a diameter of 1 μm and a depth of 1 μm. 3004 is arranged (see FIG. 20).

  The spin cast mold 3002 can be rotated together with the first mold 3003 and the second mold 3004 by a rotating shaft 3007 constituting a rotating means. Further, the spin cast mold 3002 can be adjusted to an appropriate temperature for each process by the temperature adjusting means 3008 using a circulating heat medium such as water or silicone oil. Further, the spin cast mold 3002 is arranged in an atmosphere that can be evacuated to a pressure of 10 Pascals by a dry pump (not shown).

  FIG. 20 shows a centrifugal molding process using the spin cast centrifugal molding machine 3000 configured as described above. First, as shown in FIG. 20A, the first mold 3003 is fixed to the inner surface of the spin cast mold 3002, and the plasticized object 3006 is supplied from the supply means 3005 to the spin cast mold 3002. Next, as shown in FIG. 20 (B), the spin cast mold 3002 and the first mold 3003 are heated to a high temperature by the temperature adjusting means 3008 and plasticized by the centrifugal force generated when rotating by the rotating shaft 3007. The object 3006 is pressed against the first mold 3003. Next, as shown in FIG. 20C, the rotation of the spin cast mold 3002 is stopped, the second mold 3004 is arranged inside the molding object 3006, and the spin is again performed as shown in FIG. The cast mold 3002 is rotated and the second mold 3004 is pressed against the plasticized workpiece 3006 by centrifugal force generated by the rotation. Next, as shown in FIG. 20E, while the spin cast mold 3002 continues to rotate, the temperature control means 3008 cools the spin cast mold 3002, the first mold 3003, and the second mold 3004, Let the molded product 3006 be a cured molded product 3009. Next, as shown in FIG. 20F, the cured molded product 3009 is peeled from the spin cast mold 3002, the first mold 3003, and the second mold 3004. Thereafter, as shown in FIG. 20G, the cured molded product 3009 is cut into a molded product 3010 as necessary.

  In Example 3, the configuration of the mold 3001 is made to correspond to the configuration of the sixth embodiment, but may be made to correspond to the configuration of the molds of the fourth and fifth embodiments. That is, the spin cast mold 3002 to which the first mold 3003 is fixed is rotated, and the molding object 3006 is pressed against the surface of the first mold 3003 by centrifugal force, so that the fine uneven shape of the first mold 3003 is molded. You may transfer to the outer surface of 3006. In addition, the first mold 3003 is not fixed to the spin cast mold 3002, and the second mold 3004 is disposed on the inner surface of the molding object after centrifugal molding, and centrifugal force is applied to the second mold 3004 to cover the mold. The fine uneven shape of the second mold 3004 may be transferred to the inner surface of the molded product 3006.

  Next, Example 4 will be described. This Example 4 shows an example of creating a molded product having a fine uneven shape on both the outer surface and the inner surface, which was created using the spin cast centrifugal molding machine 3000 of Example 3.

  As in Example 2, PMMA was used for the molding object 3006. A 0.1 kg workpiece 3006 plasticized by heating to 240 ° C. in advance is rotated at 10 rpm and fed into a spin cast mold 3002 maintained at 150 ° C., and then the rotational speed is increased to 4000 rpm. The object 3006 was pressed against the first mold 3003 by holding for 2 minutes. Thereafter, while continuing to rotate the spin cast mold 3002, the temperature is lowered to 100 ° C. over 5 minutes (10 ° C./min), and the rotation is stopped to face the first mold 3003 on the half-cured molding 3006. The second mold 3004 was disposed at the position, and the spin mold 3002 was again rotated at 4000 rpm and the temperature was 150 ° C. for 2 minutes, and the second mold 3004 was pushed into the molding object 3006. Thereafter, the temperature was lowered to 80 ° C. over 5 minutes (14 ° C./min), and rotation was stopped to obtain a hexagonal truncated pyramid shaped molded product 3009 in which fine irregularities were formed on the outer surface and the inner surface.

  One side of the microprojections formed on the inner and outer side surfaces of the hexagonal truncated pyramid shaped molded product 3009 is 1 μm, the height is 1 μm, and they are arranged with a period (pitch) of 2 μm. With such a fine structure, the reflectance and water repellency of light on both surfaces of the molded product 3009 can be changed, and a pyramidal structure having specific surface properties can be formed.

  Next, Example 5 will be described. FIG. 21 shows the molded product of Example 5 molded by the centrifugal molding method. The molded product shown in the figure is a cell culture container. The cell culture vessel 5000 is made of cylindrical polystyrene having a diameter of 5 cm, a length of 10 cm, and a thickness of 1 mm, and a microprojection 5001 having a diameter of 500 nm and a height of 1 μm mainly composed of polystyrene extending from the vessel is formed on the inner surface thereof. Have.

  A method for manufacturing the cell culture container 5000 will be described with reference to FIG. In the figure, reference numeral 5002 indicates a rotary drum type centrifugal molding machine. A mold 5003 in the rotary drum type centrifugal molding machine 5002 includes a cylindrical rotary drum 5004 and a mold 5006 disposed on a molding object 5005 pressed against the inner peripheral surface of the rotary drum 5004 by centrifugal molding. It is prepared for.

  The rotating drum 5004 has a cylindrical shape with an inner diameter of 5 cm and a length of 10 cm, and the mold 5006 has a surface with a number of holes having a diameter of 500 nm and a depth of 1 μm, a length of 15.7 cm, a width of 10 cm, and a thickness of 0. A 1 mm Ni mold rolled into a cylindrical shape with the hole on the outside is used. The rotating drum 5004 can be adjusted to an appropriate temperature for each process by a temperature adjusting means 5007 using a circulating heat medium such as water or silicone oil.

  The mold 5003 is arranged in a chamber (not shown) that can be in a vacuum atmosphere, and can be evacuated to a pressure of 10 Pascals by a dry pump.

  The manufacturing method of the cell culture container 5000 using such a rotary drum type centrifugal molding machine 5002 will be described. First, as shown in FIG. 22 (A), an atmospheric pressure rotary drum held at 150 ° C. by temperature control means 5007. A molding object 5005 heated to 240 ° C. is supplied to the inner surface of 5004. Next, as shown in FIG. 22B, the temperature is maintained at 150 ° C. by the temperature adjusting means 5007, the rotating drum 5004 is rotated by the rotating means (not shown), and the object 5005 is molded by the centrifugal force generated at that time. To a cylindrical shape with a uniform thickness. Next, as shown in FIG. 22C, the temperature is lowered to 100 ° C. over 5 minutes (10 ° C./min) while the rotation of the rotary drum 5004 is continued, and the rotation is stopped and the half-cured object 5005 is placed. A cylindrical mold 5006 is arranged on the surface, and as shown in FIG. 22 (D), the degree of vacuum is set to 10 Pascals by a dry pump, and then the rotational speed of the rotating drum 5004 is set to 8500 rpm and the temperature is set to 150 ° C. for 2 minutes. The mold 5006 was pressed against the molding object 5005. Next, as shown in FIG. 22E, the rotating drum 5004 and the mold 5006 are cooled by the temperature adjusting means 5007 while the rotation of the rotating drum 5004 is continued to obtain a molded product 5008 in which the molding object 5005 is cured. Then, as shown in FIG. 22 (F), a cylindrical cell culture container in which a cured molded product 5008 is peeled off from the rotary drum 5004 and the mold 5006 to form a microprojection 5001 having a diameter of 500 nm and a height of 1 μm on the inner surface. 5000 was obtained.

  Next, a method for using the cell culture container 5000 will be described. In the cell culture vessel 5000, after putting desired cells, the cells are cultured by flowing a culture solution from one end of the cell culture vessel 5000 to the other end. When cells are cultured in a normal polystyrene tube, the cells are strongly connected to the container. However, since the microprojections 5001 make point contact with the cells, the binding force between the cells and the container can be weakened, and the flow rate of the culture solution is temporarily reduced. By increasing the number, the effect that the cells can be easily detached from the container can be obtained.

  A culture system using the cell culture vessel 5000 is shown in FIG. This system includes a cell culture vessel 5000, a pump 5100, a valve 5101, a culture solution reservoir 5102, and a non-cell-adhesive pipe connecting the respective cells. At the start of culture, the pump 5101 and the valve 5101 are operated to introduce cells into the cell culture vessel 5000 through the introduction path 5103. During culture, the culture solution is gently circulated from the culture solution reservoir 5102 to the cell culture vessel 5000 through the circulation path 5104. At the end of the culture, the flow rate of the culture solution is increased to detach the cells from the container, and the cells are discharged through the discharge path 5105.

  By using the present cell culture container 5000, it is possible to significantly reduce damage to cells due to peeling from the container, which has occurred when using a normal container, and to improve the state of the cells after culture. In addition, the culture fluid can easily flow through the entire cell through the gap formed in the lower part of the cell formed by the microprojections 5001 on the cell culture container 5000. As a result, it is possible to efficiently supply nutrients to the cells and discharge the waste products of the cells, and to suppress the death of the cells during the cell culture, which has conventionally occurred.

  The microprojections 5001 on the inner surface of the cell culture vessel 5000 may be subjected to a hydrophilic treatment by plasma treatment or the like. Moreover, although the material of the cell culture container 5000 is polystyrene in this embodiment, this is not particularly limited. However, it is preferable to select a material that has little influence on the cells (tissue) to be cultured. For example, PMMA, polylactic acid, etc. are desirable in addition to polystyrene. In addition, if the microprojections 5001 are formed of a substance having temperature functionality, there is an effect that the cells can be more easily detached from the cell culture container 5000.

  In this embodiment, the tip of the microprojection 5001 is smaller than the root and has a divergent shape. Further, since the microprojection 5001 is the same as the base material, there is an effect that the microprojection is difficult to come off from the cell culture container.

  In the present embodiment, the cell culture vessel 5000 is cylindrical, but is not particularly limited thereto, and has a prismatic shape, a conical shape, a pyramidal shape, etc. in consideration of ease of manufacture and fluid flow. You can also.

  Next, Example 6 will be described. In this embodiment, an example in which a fine protrusion is applied as a water repellent surface on the surface will be described. FIG. 24 is a diagram showing a molded product having a water-repellent surface according to this example. As shown in the figure, a microprojection 6001 is formed on the surface of the molded product 6000 of this embodiment, thereby forming a water repellent surface 6002. In the microprojection 6001 of this embodiment, the pitch (interval) between adjacent microprojections 6001 is 20 nm to 10 μm, and the diameter of the tip of the projection 6001 is 50 nm to 500 nm. Further, the material of the microprojections 6001 is not particularly limited, but in order to provide water repellency, it is necessary that the material has water repellency such as polystyrene.

  In the water-repellent surface 6002 of this embodiment, as shown in FIG. 24, the contact area with the water droplet 6003 is formed by forming the microprojections 6001 on the surface of the molded product 6000 as compared with the case where the microprojections 6001 are not formed. The water repellency of the material can be amplified by the lotus leaf effect obtained by forming the microprojections 6001. In addition, since the microprojections 6001 on the water repellent surface of this embodiment can have a dense structure with a nanometer size interval, they have a property that they are not easily crushed and difficult to remove, and are excellent in the durability of the water repellent effect.

  The water-repellent surface 6002 of this embodiment can be applied to the surface of a hood, light cover, window, or the like. In this case, as a method for forming the water-repellent surface 6002 on these, the microprojection 6001 may be directly formed by molding a member for which the water-repellent surface is to be formed by the same centrifugal molding method as in Example 3. Alternatively, a molded product in which the water repellent surface 6002 is formed by a centrifugal molding method may be formed separately from the member for which the water repellent surface is to be formed, and this may be attached to the member for which the water repellent surface 6002 is to be formed with an adhesive or the like.

  According to the water-repellent surface 6002 of the present embodiment, there is no need for a conventionally used water-repellent coating treatment, and the material surface itself can be easily modified by one transfer.

  The case where the surface of the molded product 6000 has water repellency has been described above. However, in the case where the surface of the molded product 6000 has hydrophilicity, if a material such as hydrophilic resin or quartz glass is used for the microprojection 6001, the water-repellent surface is improved. As in the case of forming, a hydrophilic surface can be easily formed.

  Next, Example 7 will be described. In the present embodiment, an example will be described in which a fine protrusion formed on a molded product is applied as an unstained color developing structure. FIG. 25 is a view showing a molded product having an undyed color developing structure of this example. In the figure, a microprojection 7001 is formed on the surface of a molded product 7000, thereby forming an unstained coloring structure 7002.

  Explaining the coloring principle of the unstained coloring structure 7002, visible light incident on the microprojection 7001 is reflected while causing interference on the microprojection 7001, and appears as if the molded product 7000 has developed color. Can do. As shown in FIG. 25, by changing the intervals (pitch) P1 and P2 of the microprojections 7001, the interference degree of visible light changes and the visible color tone can be changed. For example, when white light including components of wavelengths λ1, λ2,... Is incident on the minute protrusion 7002, reflected light from the small pitch P1 becomes light of λ1 (for example, blue), and reflected light from the large pitch P2 is It becomes λ2 (for example, yellow).

  As the interval between the microprojections 7001 is increased, the interference of the long wavelength color becomes stronger, and the color can be changed in the order of blue, green, yellow, and red. In this way, by adjusting the interval between the protrusions, it is possible to make the molded article 7000 appear colored without using a dye or a pigment. Moreover, it is also possible to change a color for every place. Further, since the unstained coloring structure 7002 of this embodiment uses interference light, the color tone can be changed depending on the viewing angle.

  Further, the degree of interference of visible light can be similarly changed by changing the diameter and height of the microprojections 7001, and thus the color can be changed.

  In the unstained coloring structure 7002 of this example, the diameter of the microprojections 7001 to be used is preferably 100 nm to 2000 nm, and the interval between the microprojections 7001 is preferably 100 nm to 2000 nm so that visible light interference occurs.

  Such an unstained coloring structure 7002 of this embodiment can be applied to a molded product 7000 by pasting it on an in-vehicle sheet, accessories, holography, or the like.

  Next, Example 8 will be described. In this embodiment, an example in which a microprojection is applied as an antireflection layer will be described. FIG. 26 is a view showing a molded product having the antireflection layer of this example. In the figure, a microprojection 8001 is formed on the surface of a molded product 8000, whereby an antireflection layer 8002 is formed.

  The microprojections 8001 have a diameter of 1 μm or less, and the antireflection layer 8002 constituted by such microprojections 8001 is formed of a molded product 8000 such as a cover glass of a display, an optical substrate for optical communication, an automobile, and the like. It can be formed on these surfaces, for example, by sticking it on the surface of a light cover for the use.

  In the antireflection layer 8002 of this embodiment, the diameter, interval, height, or cross-sectional shape of the microprojections 8001 are adjusted, and the dielectric region of the microprojections 8001 and the microprojections 8001 in the antireflection layer 8002 are adjusted. The ratio with the non-existing air region can be changed. Therefore, the effective refractive index (hereinafter abbreviated as “refractive index”) in the antireflection layer 8002 composed of the microprojections 8001 can be arbitrarily adjusted, and reflected light on the surface of the molded product 8000 can be suppressed.

The ideal conditions for the refractive index (n _AR ) and thickness (t _AR ) in the antireflection layer 8002 are expressed by the following equations.
Refractive index: n _AR = (n _sub · n _air ) ^1/2
Thickness: t _AR = λ / (4n _AR )
n _sub : refractive index of substrate, n _air : refractive index of _air , λ: design wavelength For example, when the refractive index of the substrate (assuming glass) is 1.5 and λ is 1550 nm, the antireflection layer from the above formula The refractive index of 8002 is 1.22, and the thickness is about 320 nm. Thus, by calculating the parameters required for the antireflection layer 8002 and adjusting the shape and arrangement of the microprojections 8001, an antireflection layer such as a display cover glass or an optical substrate for optical communication is formed. Can do.

  Here, the reflected light suppressing action of the antireflection layer 8002 will be described. In FIG. 26, a light emitting element (not shown) is disposed below the molded product 8000. The antireflection layer 8002 is attached in order to suppress the reflected light generated by the incident light at the boundary between the molded product 8000 and air. The principle of reflected light suppression will be specifically described. First, since there is a difference in refractive index at the boundary between the surface of the molded body 8000a and the antireflection layer 8002, reflected light # 1 returning downward is generated. Further, reflected light is also generated at the boundary between the antireflection layer 8002 and the air. The reflected light repeats multiple reflection in the antireflection layer 8002 and transmission from the antireflection layer 8002, and then returns reflected light # 2 returning downward. Form. At this time, when the amplitudes of the reflected light # 1 and the reflected light # 2 are equal in amplitude and have an opposite phase relationship, the two reflected lights cancel each other, so that no reflected light returns downward.

  Regarding transmitted light to the air side, transmitted light # 1 that has directly passed through the antireflection layer 8002 and transmitted light # 2 that is formed after repeated reflection in the antireflection layer 8002 have the same phase relationship. Sometimes 100% transmission is obtained.

  The condition of the antireflection layer satisfying the above non-reflection condition (total transmission condition) is represented by the above-described formula. In addition, when light enters from the air side, the same antireflection effect as that obtained from below can be obtained. Further, in this embodiment, the antireflection layer 8002 is formed only on the outgoing light side of the molded product 8000. However, in the molded product 8000, a similar antireflection layer is formed on the incident light side to form the molded product 8000. The reflection of light on both sides can be prevented. Since the structure of FIG. 26 is an antireflection layer using phase interference of light, the antireflection effect is weakened with incident light deviating from the design wavelength.

Next, another example of the antireflection layer of this example will be described. FIG. 27 is a view showing a molded product having an antireflection layer according to another example of this embodiment.
In the figure, a microprojection 8101 is formed on the surface of a molded product 8100, thereby forming an antireflection layer 8102. The microprojection 8101 is a substantially cone that narrows from the root toward the tip. It is formed into a shape. This is different from the antireflection principle shown in FIG. 26 as follows. That is, by making the shape of the microprojection 8101 substantially conical, the refractive index in the antireflection layer 8102 is gradually changed from the refractive index of the molded body 8100a to the refractive index of air. A discontinuous surface due to a rate difference can be eliminated, and reflection can be suppressed. In addition, since the phase interference of light is not used, the wavelength dependency of the reflectance is relaxed, and an antireflection effect in a wide wavelength band can be obtained. Then, in the region of wavelengths from 300 nm to 700 nm, the reflectance could be suppressed to 1/50 or less compared to the case without the antireflection layer.

According to this example, it is difficult to use a continuous film of MgF ₂ conventionally used as an antireflection layer for a glass substrate by expanding the air region in the antireflection layer 8102 composed of the microprojections 8101. A low refractive index layer having a refractive index of 1.3 or less can be realized. Therefore, for example, an antireflection layer that suppresses reflected light from the surface of a glass substrate having a refractive index of about 1.5 can be formed as a single layer. Specifically, in the conventional MgF ₂ continuous film, the refractive index is about 1.3 at least, but in the antireflection layer 8102 of this example, the diameter and interval of the microprojections 8101 are optimized. The refractive index can be adjusted to about 1.2, which is close to the ideal condition.

  In the molded product 8100 shown in the figure, the antireflection layer 8102 is formed only on the outgoing light side of the molded product 8100. However, by forming a similar antireflection layer on the incident light side, light on both surfaces of the molded product can be obtained. Reflection can be prevented.

  In addition to the embodiments shown in FIGS. 26 and 27 described above, the same molded product 8000 can be obtained by changing the diameters and intervals of the microprojections 8001 and 8101 for each specific region on the molded product 8000 or the molded product 8100. , 8100, antireflection layers 8002 and 8102 having different wavelength characteristics can be arranged in an arbitrary region as a single layer or multiple layers.

The schematic sectional drawing which shows the apparatus principal part of the centrifugal molding machine in 1st embodiment of this invention. The schematic sectional drawing which shows a state when rotating a metal mold | die from the state shown in FIG. 1, and carrying out the centrifugal molding. The schematic sectional drawing which shows the apparatus principal part of the centrifugal molding machine in 2nd embodiment of this invention. FIG. 4 is a schematic cross-sectional view showing a state when a rotating drum is rotated from the state shown in FIG. 3. The schematic sectional drawing which shows a state when arrange | positioning a mold on a to-be-molded object from the state shown in FIG. The schematic sectional drawing which shows the apparatus principal part of the centrifugal molding machine in 3rd embodiment of this invention. The schematic sectional drawing which shows a state when a metal mold | die is rotated from the state shown in FIG. FIG. 8 is a schematic cross-sectional view showing a state when a mold is arranged on the workpiece from the state shown in FIG. 7. The schematic sectional drawing which shows the apparatus principal part of the centrifugal molding machine in 4th embodiment of this invention. The schematic sectional drawing which shows a state when a metal mold | die is rotated from the state shown in FIG. The schematic sectional drawing which shows the apparatus principal part of the centrifugal molding machine in 5th embodiment of this invention. The schematic sectional drawing which shows a state when rotating a spin-cast metal mold | die from the state shown in FIG. The schematic sectional drawing which shows a state when a mold is arrange | positioned on a to-be-molded object from the state shown in FIG. The schematic sectional drawing which shows the apparatus principal part of the centrifugal molding machine in 6th embodiment of this invention. The schematic sectional drawing which shows a state when a metal mold | die is rotated from the state shown in FIG. The schematic sectional drawing which shows a state when arrange | positioning a mold on a to-be-molded object from the state shown in FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective view illustrating a main part of a rotating drum centrifugal molding machine according to a first embodiment. The figure which shows the process of the centrifugal molding using the rotating drum type centrifugal molding machine shown in FIG. FIG. 6 is a schematic perspective view showing the main part of the spin cast centrifugal molding machine of Example 3. The figure which shows the process of the centrifugal molding using the spin cast type | mold centrifugal molding machine shown in FIG. The figure which shows the process of the centrifugal molding using the spin cast type | mold centrifugal molding machine shown in FIG. The figure which shows the cell culture container which is a molding of Example 5 shape | molded by the centrifugal molding method. The figure which shows the process of carrying out the centrifugal molding of the molding shown in FIG. Schematic which shows the culture system using the cell culture container which is a molding of Example 5. FIG. The figure which shows the molding which has the water-repellent surface of Example 6. FIG. The figure which shows the molding which has a non-dye coloring structure of Example 7. FIG. The figure which shows the molding which has an antireflection layer of Example 8. FIG. The figure which shows the molding which has another antireflection layer of Example 8. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Centrifugal molding machine 101 Mold 102 Rotary drum 103 Mold 104 Molding object 200 Centrifugal molding machine 201 Mold 202 Mold 300 Centrifugal molding machine 301 Mold 302 First mold 303 Second mold 400 Centrifugal molding machine 401 Mold 402 Spin cast Mold 402a Bottom plate 402b Side plate 403 Mold 404 Rotating shaft 500 Centrifugal molding machine 501 Mold 502 Mold 600 Centrifugal molding machine 601 Mold 602 First mold 603 Second mold 1000 Rotary drum type centrifugal molding machine 1001 Mold 1002 Rotary drum 1003 Mold 1004 Rotating shaft 1005 Temperature control means 1006 Molded object 1007 Molded object 1008 Molded article 3000 Spin cast type centrifugal molding machine 3001 Mold 3002 Spin cast mold 3002a Bottom plate 30 2b Side plate 3003 First mold 3004 Second mold 3005 Supply means 3006 Molded object 3007 Rotating shaft 3008 Temperature control means 3009 Molded article 3010 Molded article 5000 Cell culture container 5001 Microprojection 5002 Rotating drum type centrifugal molding machine 5003 Mold 5004 Rotation Drum 5005 Molded object 5006 Mold 5007 Temperature control means 5008 Molded object 5100 Pump 5101 Valve 5102 Culture solution reservoir 5103 Introduction path 5104 Circulation path 5104 Discharge path 6000 Molded article 6001 Microprojection 6002 Water repellent surface 6003 Water droplet 7000 Projection 7001 Molded article 7001 Object 7002 Unstained coloring structure 8000 Molded product 8000a Molded body 8001 Microprojection 8002 Antireflection layer 8100 Molded 8100a Molded body 8101 Small protrusions 8102 antireflection layer

Claims (6)

A centrifugal molding machine that performs molding by pressing a molding object in a plasticized state against the molding surface of the mold by centrifugal force generated by rotating the mold,
The centrifugal molding machine, wherein the molding surface has a fine shape, and the molding object is pressed against the molding surface by a centrifugal force generated by rotation of the mold.   A mold having a fine shape formed on one side thereof, and the mold is disposed with the one side facing the surface of the object being pressed against the molding surface by rotation of the mold; 2. The centrifugal molding machine according to claim 1, wherein one surface side is pressed against the plastic workpiece in a plasticized state by a centrifugal force generated by rotating the mold. A centrifugal molding machine that performs molding by pressing a molding object in a plasticized state against the molding surface of the mold by centrifugal force generated by rotating the mold,
A mold having a fine shape formed on one side thereof, and the mold is disposed with the one side facing the surface of a molding object that is pressed against the molding surface by rotation of the mold. The centrifugal molding machine is characterized in that one surface side is pressed against the plasticized article by a centrifugal force generated by rotating the mold.   By pressing the molded object in a plasticized state against the molding surface of the mold having a fine shape by the centrifugal force generated by rotating the mold, the fine shape is formed on the molding surface side of the mold. A molded product characterized in that is formed. By pressing the molded object in a plasticized state against the molding surface of the mold having a fine shape by the centrifugal force generated by rotating the mold, a fine shape is formed on the surface on the molding surface side. ,And,
A state in which the mold is placed on the surface of the object being pressed against the molding surface, and one side of the mold on which the fine shape is formed is plasticized by centrifugal force generated by rotating the mold A molded product characterized in that a fine shape is formed on a surface opposite to the molding surface side by being pressed against the molding object.   The molded object that is plasticized by the centrifugal force generated by rotating the mold is pressed against the molding surface of the mold, and the mold is placed on the surface of the molded object that is pressed against the molding surface. Then, by pressing the one surface side of the mold having a fine shape against the plasticized state by centrifugal force generated by rotating the mold, the side opposite to the molding surface side A molded product characterized in that a fine shape is formed on the surface.

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