JP2000015676A - Resin molding method - Google Patents

Abstract

(57) Abstract: The present invention provides a resin molding method for inexpensively and accurately molding a resin molded product having a surface shape such as a spherical surface arranged continuously in an array or a sheet. A resin molding apparatus continuously supplies a molten resin from an extruding section to a mirror-finished section through a resin supply path, and the mirror-finished section includes lower mirror pieces at an initial position. And upper mirror pieces 16a to 16f
The molten resin 14 is moved at a constant speed in the direction of the finishing position while gradually pressing the molten resin 14 until it becomes a regular lens thickness while pressing the molten resin 14 supplied by the above. Before reaching the finishing position, the lower mirror pieces 15a to 15f and the upper mirror pieces 16a to 16f cool the resin 14 to a temperature equal to or lower than the heat deformation temperature, and when the resin 14 moves to the finishing position, it separates from the resin 14, Again, the lens is moved to the initial position and the same lens processing operation is performed. Therefore, the resin molding device 10 is a small and inexpensive device, and can continuously and accurately mold a molded product having a mirror surface having a predetermined length.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molding method and a resin molding die, and more particularly, to a laser type digital copying machine, an optical scanning system of a laser printer or a facsimile apparatus, an optical apparatus such as a video camera, and the like. The present invention relates to a resin molding method for molding a resin molded product such as a plastic molded product applied to an optical disc or the like.

[0002]

2. Description of the Related Art As a method of performing plastic molding (resin molding) for plastic lenses, light guides, and the like, generally,
There are an injection molding method and an injection compression molding method.

[0003] In this injection molding method, for example, as shown in FIG. 12, when the temperature of a mold 1 is set lower than the softening temperature of the molding resin 2, the molten resin 2 is placed in a cavity 3 having a fixed volume of the mold 1. Is injected, and after cooling slowly while controlling the holding pressure, the mold 1 is opened and a molded product is taken out.

In the injection compression molding method, a transfer piece for forming a transfer surface in a mold is made movable, and molten resin is poured into a cavity having a predetermined volume while the mold temperature is lower than the softening temperature of the molding resin. Injection filling, when cooling slowly while controlling the holding pressure, apply pressure to the resin by sliding the transfer piece in response to the volume shrinkage of the resin during cooling, and make the shape of the molded product more precise It is a method of forming the above.

A method of manufacturing a plastic lens described in Japanese Patent Application Laid-Open No. Hei 7-148857 has been proposed. A lens mold is attached to each of a pair of press plates that can be opened and closed, and a translucent resin plate is inserted between both lens molds with the pair of press plates open,
With the pair of press plates open, the translucent resin plate is heated to a temperature at which the translucent resin plate can be molded, then the pair of press plates are closed to press the translucent resin plate, and a lens mold is used. It is characterized in that compression molding and cooling of the translucent resin plate are performed simultaneously.

That is, in this conventional method of manufacturing a plastic lens, a pair of press plates are opened, and the transparent resin plate is heated to a temperature at which it can be molded. The compression molding and cooling of the resin plate are performed simultaneously.

[0007]

However, in such a plastic molding method, it is very difficult to mold a molded article in which a plurality of mirror surfaces are arranged in an array or a two-dimensional sheet. In particular, molding becomes more difficult as the number of mirror surfaces of the molded product increases.

That is, in the injection molding method and the injection compression molding method, a molten resin is injected and filled in a cavity having a predetermined volume. Therefore, when the number of mirror surfaces of a molded product increases, as shown in FIG. The length of the cavity 3 and the area of the cavity 3 increase, and the internal pressure of the molten resin 2 injected and filled into the cavity 3 increases near the entrance and decreases as the depth decreases. The accuracy may become non-uniform, and all regions in the cavity 3 may not be properly filled with the molten resin 2. As a result, it is difficult to perform the molding properly. In addition, there is a problem that the size of the mold and the molding machine are increased in accordance with the shape and dimensions of the molded product, and the number of mirror pieces on the mirror surface portion of the mold is required to be equal to the number of lens surfaces, thereby increasing the molding cost.

Also, in a manufacturing method using a press represented by a method for manufacturing a plastic lens described in Japanese Patent Application Laid-Open No. 148857/1995, there is a problem that the molding cost is high as in the case of the injection molding method. was there.

Therefore, according to the first aspect of the present invention, when a plurality of molded products having a predetermined surface shape arranged in an array or sheet shape are formed, mirror surfaces corresponding to the surface shapes to be formed are provided. A plurality of pairs of mirror surface pieces are arranged so as to be able to approach and separate in a state and to be movable in the direction from a predetermined initial position to a finishing position in a predetermined direction by a number smaller than the number of surface shapes to be molded. The plurality of pairs of mirror pieces move from the initial position to the finishing position at a predetermined speed while sequentially applying pressure to the resin that is continuously supplied, and move to the finishing position. By moving to the initial position and performing resin molding again, a molded product having a continuous surface shape with a smaller number of mirror surface pieces than the number of surface shapes to be molded can be molded with high precision, at a low cost and a high cost. Array-like or sheet-like accuracy And its object is to provide a resin molding method capable of molding a plurality aligned molded articles preparative form.

According to a second aspect of the present invention, when a plurality of molded products having a predetermined surface shape arranged in an array or a sheet shape are formed, they have mirror surfaces corresponding to the surface shapes to be molded and are opposed to each other. A plurality of pairs of mirror surface pieces are arranged so that they can be approached / separated and are arranged in a predetermined direction from a predetermined initial position to a finishing position by a number smaller than the number of surface shapes to be formed and can be moved at a predetermined speed in the direction. The molten resin heated above the glass transition temperature of the amount required for molding according to the moving speed of the pair of mirror pieces is supplied to the initial position. When moving sequentially from the initial position to the finishing position while applying pressure, and moving to the finishing position,
After separating and separating the resin and molding, the resin is moved to the initial position and the resin is molded again, so that the molten resin is added while moving sequentially with a smaller number of mirror surface pieces than the number of surface shapes to be molded. A resin molding method capable of forming a molded product having a continuous surface shape with high precision by pressing, and forming a plurality of molded products arranged in an array or sheet at low cost and with high precision. And

According to a third aspect of the present invention, a plurality of pairs of mirror-finished pieces are moved from an initial position to a finishing position while pressing a molten resin heated to a glass transition temperature or higher to a predetermined thickness. By cooling the molten resin to a temperature equal to or lower than the thermal deformation temperature while moving from the finishing position to the finishing position, a molded product having a surface shape that is continuous and appropriately continuous can be molded with high precision, and at a lower cost and higher cost. It is an object of the present invention to provide a resin molding method capable of accurately molding a plurality of molded products arranged in an array or a sheet.

According to a fourth aspect of the present invention, a plurality of pairs of mirror-finished pieces are pressurized to a predetermined thickness while maintaining the molten resin heated above the glass transition temperature above the glass transition temperature from the initial position. Move to the finishing position, then
While moving to the finishing position, the molten resin is cooled to a temperature equal to or lower than the thermal deformation temperature, thereby smoothing the temperature change, forming a molded product having a continuous surface shape with higher accuracy, at a low cost and It is an object of the present invention to provide a resin molding method capable of molding a plurality of molded products arranged in an array or a sheet with higher precision.

According to a fifth aspect of the present invention, when a plurality of molded products having a predetermined surface shape arranged in an array or sheet shape are formed, they have mirror surfaces corresponding to the surface shapes to be formed and face each other. A plurality of pairs of mirror surface pieces are arranged so that they can be approached / separated and are arranged in a predetermined direction from a predetermined initial position to a finishing position by a number smaller than the number of surface shapes to be formed and can be moved at a predetermined speed in the direction. After the resin blocks of a predetermined size are bonded by a predetermined method, the resin blocks are supplied to the initial position by an amount necessary for molding according to the moving speed of the plurality of pairs of mirror surface pieces. The heated resin block moves from the initial position to the finishing position while heating and pressurizing to a temperature equal to or higher than the glass transition, and moves to the finishing position, separates and separates the resin, then moves to the initial position, Resin molding By heating and pressing the joined solid resin blocks while moving sequentially with a smaller number of mirror pieces than the number of surface shapes to be molded, a molded product with a continuous surface shape is formed with high precision It is another object of the present invention to provide a resin molding method capable of molding a plurality of molded products arranged in an array or a sheet at low cost and with high precision.

According to a sixth aspect of the present invention, a plurality of pairs of mirror pieces are pressurized to a predetermined thickness while heating the joined resin block to a temperature equal to or higher than the glass transition, from the initial position to the finishing position. Then, while moving to the finishing position, the resin is cooled to a temperature equal to or lower than the thermal deformation temperature, thereby smoothing the temperature change and forming a molded product having a surface shape that continues more precisely. It is another object of the present invention to provide a resin molding method capable of molding a plurality of molded products arranged in an array or a sheet at low cost and with higher precision.

According to a seventh aspect of the present invention, by joining the resin blocks by heat welding, the resin blocks are joined inexpensively and appropriately, and a plurality of the resin blocks are arranged in an array or sheet at low cost and with high precision. It is an object of the present invention to provide a resin molding method capable of molding a molded article.

According to an eighth aspect of the present invention, the resin blocks are joined by using ultrasonic vibration, whereby the resin blocks can be joined more appropriately and more inexpensively, and the array or sheet can be inexpensively and precisely formed. It is an object of the present invention to provide a resin molding method capable of molding a plurality of molded articles arranged in a shape.

According to the ninth aspect of the present invention, the resin blocks are joined by using an adhesive, so that the resin blocks can be joined more appropriately and more inexpensively, and can be inexpensively and precisely formed into an array or sheet. It is an object of the present invention to provide a resin molding method capable of molding a plurality of molded articles.

According to a tenth aspect of the present invention, the resin before molding is a solid in which a relief portion for absorbing excess resin during molding is formed in a region other than a portion where a surface shape is molded by a mirror surface piece. Accordingly, it is an object of the present invention to provide a resin molding method capable of preventing unnecessary resin from protruding into a molded product and further improving the quality of the molded product.

[0020]

According to a first aspect of the present invention, there is provided a resin molding method for molding a plurality of molded products having a predetermined surface shape arranged in an array or a sheet. The mirror pieces which have mirror portions corresponding to the surface shapes and are arranged so as to be close to and separated from each other in a state where they are opposed to each other, a predetermined number from the predetermined initial position to the finishing position by a number smaller than the number of the surface shapes to be molded. The plural pairs of mirror pieces are moved at a predetermined speed from the initial position to the finishing position while sequentially pressing the resin supplied continuously, and the finishing is performed. When the resin is moved to the position, the resin is separated and separated and molded, and then the resin is moved to the initial position and the resin is molded again, thereby achieving the above object.

According to the above-described structure, when a plurality of molded products having a predetermined surface shape arranged in an array or sheet shape are formed, a mirror surface portion corresponding to the surface shape to be formed is provided. Plural pairs of mirror surface pieces are arranged so as to be separable and movable in the direction from a predetermined initial position to a finishing position in a predetermined direction by a number smaller than the number of surface shapes to be formed. The mirror piece moves from the initial position to the finishing position at a predetermined speed while sequentially pressing the resin supplied continuously, and when it moves to the finishing position, it separates and separates the resin, then forms the resin, and then moves to the initial position. Go,
Since the molding of the resin is performed again, a molded product having a continuous surface shape with a smaller number of mirror surface pieces than the number of surface shapes to be molded can be molded with high precision, and an array or sheet can be formed inexpensively and with high precision. A plurality of molded articles arranged in a shape can be formed.

According to a second aspect of the present invention, there is provided a resin molding method for molding a plurality of molded products having a predetermined surface shape arranged in an array or sheet shape, wherein a mirror surface portion corresponding to the surface shape to be molded is formed. The mirror pieces which are provided so as to be able to approach and separate from each other in a state where they face each other are arranged in a predetermined direction from a predetermined initial position to a finishing position by a number smaller than the number of the surface shapes to be formed, and are predetermined in the direction. Is provided so as to be movable at a speed, and supplies the molten resin heated to a glass transition temperature or more in an amount required for molding to the initial position according to the moving speed of the plurality of mirror-faced pieces to the initial position, The piece moves at the moving speed while pressing the supplied molten resin sequentially from the initial position to the finishing position, and moves to the finishing position, after which the resin is separated and separated to form the resin. Initial rank Moves to, by performing molding of the resin again, have achieved the above objects.

According to the above-described structure, when a plurality of molded products having a predetermined surface shape arranged in an array or sheet shape are formed, a mirror surface portion corresponding to the surface shape to be formed is provided. A plurality of pairs of mirror surface pieces are arranged so as to be separable, and are arranged in a predetermined direction from a predetermined initial position to a finishing position by a number smaller than the number of surface shapes to be formed and movable at a predetermined speed in the direction. According to the moving speed of the plurality of pairs of mirror pieces, the molten resin heated to the glass transition temperature of the amount required for molding or more is supplied to the initial position, and the plurality of pairs of mirror pieces sequentially initialize the supplied molten resin. After moving from the position to the finishing position while applying pressure, and moving to the finishing position, the resin is separated and separated, molded, then moved to the initial position, and the resin is molded again. Fewer mirrors than The molten resin is pressurized while moving sequentially with a piece, and a molded product having a continuous surface shape can be molded with high precision, and a plurality of molded products arranged in an array or sheet at low cost and with high precision can do.

In this case, for example, the plurality of pairs of mirror-finished pieces are formed from the initial position while pressing the molten resin heated above the glass transition temperature to a predetermined thickness. The molten resin may be cooled to a temperature equal to or lower than a heat deformation temperature while moving in the position direction and moving from the initial position to the finishing position.

According to the above construction, a plurality of pairs of mirror pieces are moved from the initial position to the finishing position while pressing the molten resin heated above the glass transition temperature to a predetermined thickness,
Furthermore, since the molten resin is cooled to a temperature equal to or lower than the thermal deformation temperature during the movement from the initial position to the finishing position, it is possible to form a molded product having a continuous surface shape at a lower cost with high precision. Thus, a plurality of molded products arranged in an array or a sheet can be formed at lower cost and with higher precision.

For example, as set forth in claim 4, the plurality of pairs of mirror-finished pieces are provided so that the molten resin heated to a temperature higher than the glass transition temperature is maintained at a temperature higher than the glass transition temperature to a predetermined thickness. The molten resin may be cooled to a temperature equal to or lower than a heat deformation temperature while moving from the initial position to the finishing position while applying pressure, and thereafter moving to the finishing position.

According to the above construction, a plurality of pairs of mirror-finished pieces are pressed from the initial position to the finishing position while the molten resin heated above the glass transition temperature is pressed to a predetermined thickness while maintaining the temperature above the glass transition temperature. Direction, and then, while moving to the finishing position, the molten resin is cooled to a temperature lower than the heat deformation temperature, so the temperature change is smoothed and the molding has a surface shape that is more highly continuous. A plurality of molded products can be molded at low cost and with higher precision in an array or sheet.

According to a fifth aspect of the present invention, there is provided a resin molding method for molding a molded product having a plurality of predetermined surface shapes arranged in an array or sheet shape, wherein the mirror surface corresponding to the surface shape to be molded is formed. The mirror pieces which are arranged so as to be able to approach / separate each other in a state where they face each other are arranged in a predetermined direction from a predetermined initial position to a finishing position by a number smaller than the number of the surface shapes to be formed in the direction. It is arranged movably at a predetermined speed, and after joining a resin block of a predetermined size by a predetermined method, it is supplied to the initial position by an amount required for molding according to a moving speed of the plurality of pairs of mirror surface pieces, When a plurality of pairs of mirror-finished pieces move at the moving speed while heating and pressurizing the supplied bonded resin block from the initial position to the finishing position to a temperature equal to or higher than the glass transition, and move to the finishing position. After spaced apart from and molded by leaving the resin, is moved to the initial position, by performing molding of the resin again, we have achieved the above objects.

According to the above configuration, when molding a plurality of molded products having a predetermined surface shape arranged in an array or a sheet shape, a mirror surface portion corresponding to the surface shape to be molded is provided. A plurality of pairs of mirror surface pieces are arranged so as to be separable, and are arranged in a predetermined direction from a predetermined initial position to a finishing position by a number smaller than the number of surface shapes to be formed and movable at a predetermined speed in the direction. After joining resin blocks of a predetermined size by a predetermined method, a plurality of pairs of mirrored pieces are supplied to the initial position by an amount required for molding according to the moving speed of the plurality of pairs of mirrored pieces. Heat the resin block from the initial position to the finishing position to a temperature above the glass transition.
It moves while pressing and moves to the finishing position, after separating and removing the resin and molding, it moves to the initial position and remolds the resin, so the number of the surface shapes to be molded is smaller than the number of surface shapes to be molded. By heating and pressing the solid resin blocks joined while moving sequentially with a mirror piece, molded products having a continuous surface shape can be molded with high precision, and in an inexpensive and highly accurate array or sheet shape A plurality of molded articles can be formed.

In this case, for example, as described in claim 6, the plurality of pairs of mirror-finished pieces apply pressure to a predetermined thickness while heating the bonded resin block to a temperature equal to or higher than the glass transition. While moving from the initial position to the finishing position, and then moving to the finishing position, the resin may be cooled to a temperature equal to or lower than a heat deformation temperature.

According to the above arrangement, a plurality of pairs of mirror-surface pieces are moved from the initial position to the finishing position while applying pressure to a predetermined thickness while heating the bonded resin block to a temperature equal to or higher than the glass transition. Then, while moving to the finishing position, since the resin is cooled to a temperature equal to or lower than the heat deformation temperature, the temperature change is smoothed, and a molded article having a continuous surface shape is formed with higher precision. It is possible,
A plurality of molded products arranged in an array or a sheet can be formed at low cost and with higher precision.

Further, for example, the resin blocks may be joined by heat welding.

According to the above construction, the resin blocks are joined by heat welding, so that the resin blocks can be joined inexpensively and appropriately, and a plurality of resin blocks can be arranged in an array or sheet at low cost and with high precision. A molded article can be formed.

Further, for example, the joining of the resin blocks may be performed using ultrasonic vibration.

According to the above configuration, since the resin blocks are joined by using ultrasonic vibrations, the resin blocks can be joined more appropriately and more inexpensively, and can be formed in an array or at a lower cost and with higher precision. A plurality of molded articles arranged in a sheet can be formed.

Further, for example, the resin block may be joined using an adhesive.

According to the above configuration, since the resin blocks are joined by using the adhesive, the resin blocks can be joined more appropriately and inexpensively, and can be inexpensively and precisely formed into an array or sheet. A plurality of molded articles arranged in a shape can be formed.

In each of the above cases, for example,
As described in the above, the resin before molding may be a solid in which a relief portion for absorbing excess resin during molding is formed in a region other than a portion where the surface shape is molded by the mirror surface piece. Good.

According to the above configuration, the resin before molding is a solid in which a relief portion for absorbing excess resin during molding is formed in a region other than a portion where the surface shape is molded by the mirror piece. Unnecessary resin can be prevented from protruding from the molded product, and the quality of the molded product can be further improved.

[0040]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. It should be noted that the embodiments described below are preferred embodiments of the present invention, and therefore, various technically preferable limitations are added. However, the scope of the present invention is not limited to the following description. The embodiments are not limited to these embodiments unless otherwise specified.

FIGS. 1 and 2 are views showing a first embodiment of a resin molding method according to the present invention. In this embodiment, a molten resin is continuously supplied to a mirror-finished portion, and A molded product having a plurality of mirror surfaces in an array is formed with mirror surface pieces arranged side by side, and corresponds to claims 1 and 2 to 4.

FIG. 1 is a front sectional view of a main part of a resin molding apparatus 10 to which a first embodiment of the resin molding method of the present invention is applied.

In FIG. 1, the resin molding apparatus 10 includes an extruding part 11 and a mirror-finished part 12, and the extruding part 11 and the mirror-finished part 12 are connected by a resin supply path 13.

The extruder 11 continuously extrudes the molten resin 14 heated to a temperature equal to or higher than the glass transition temperature, and continuously supplies the molten resin 14 to the mirror-finished portion 12 through the resin supply path 13.

The mirror processing section 12 includes a plurality of lower mirror pieces 15.
a to 15f and a plurality of upper mirror pieces 16a to 16f, and lower mirror pieces 15a to 15f and upper mirror pieces 16a to 16f.
16f are arranged in a state where they face each other in pairs, and the surfaces facing each other are formed in a mirror-like shape. Each lower mirror piece 15a to 15f and upper mirror piece 16a to 16f
Are respectively held by a holding mechanism (not shown), and are arranged opposite to each other at an initial position (a position in FIG. 1) which is a left end of the mirror-finished portion 12 in FIG.
While molding the molten resin 14 supplied from
As shown by the arrow in FIG. 1, the mirror is sequentially moved from left to right at a predetermined constant speed.
2 is moved to the finishing position (the position in FIG. 1) at the right end of FIG. 2 and moved downward and upward by the holding mechanism as shown by arrows in FIG.
Again, it is moved to the initial position on the left end as shown by the arrow in FIG. 1, and the molten resin 14 is molded in the same manner as described above.

Next, the operation of the present embodiment will be described. During molding, the resin molding apparatus 10 continuously extrudes the molten resin 14 from the extrusion section 11 and supplies the molten resin 14 to the mirror-finished section 12 through the resin supply path 13. The molten resin 14 is, for example, polycarbonate or the like, and is heated to about 270 ° C. immediately after being extruded from the extruding section 11, and is heated to about 200 ° C. immediately before the mirror-finished section 12, and has a glass transition. Above the temperature, it is a temperature at which sufficient plastic working is possible.

When the molten resin 14 is supplied from the extruding portion 11 through the resin supply path 13, the mirror-finished portion 12 is moved to the lower mirror pieces 15a to 15f and the upper mirror pieces 16a at the initial positions.
From the initial position while pressing the molten resin 14 supplied at ~ 16f, the molten resin 14 is moved at a constant speed in the direction of the finishing position while gradually pressing the resin 14 until the resin 14 has a regular lens thickness. Position lower mirror pieces 15a to 15f
When the upper mirror pieces 16a to 16f move to the positions shown in FIG. 1, the lower mirror pieces 15a to 15f and the upper mirror pieces 16a to 16f at the positions move to the initial positions. As described above, the resin 14 is moved at a constant speed from the initial position to the finishing position while applying pressure.

The above-described operation processing is performed continuously, and the lower mirror piece 15a to 15f and the upper mirror piece 16a to 16f move the molten resin 14 at regular speed from the initial position to the finishing position. Apply pressure gradually until it becomes thick.

In this case, the lower mirror pieces 15a to 15a
When the f and the upper mirror pieces 16a to 16f are heated to the glass transition temperature or higher, the temperature is gradually lowered while moving from the initial position to the finishing position. Cool down to And
Molten resin 1 that extrusion unit 11 supplies to mirror finishing unit 12
4 and the speed at which the lower mirror pieces 15a to 15f and the upper mirror pieces 16a to 16f move are kept constant.

The lower mirror pieces 15a to 15 of the mirror processing section 12
f and the upper mirror pieces 16a to 16f move downward and upward respectively after moving to the finishing position by performing the above operation, separate from the resin 14, move again to the initial position,
A lens processing operation similar to the above is performed. The lower mirror pieces 15a to 15f and the upper mirror pieces 16a to 16f are
After leaving the resin 14 at the finishing position and before returning to the initial position, it is heated again to a predetermined temperature.

In the above operation, the resin 14
For example, in the case of polycarbonate, as shown in FIG. 2, at the position of FIG. 1 immediately after being extruded from the extruding portion 11 to the resin supply path 13, it is heated to about 270 ° C. which is higher than the glass transition temperature. When it is melted and supplied to the initial position of the mirror-finished portion 12, the temperature is about 200 ° C., which is higher than the glass transition temperature. Lower mirror pieces 15a to 15f and upper mirror piece 1 at a temperature equal to or higher than the glass transition temperature.
While being pressurized by 6a to 16f and moving at a constant speed, at the position before the finishing position,
It is cooled to about 130 ° C., which is lower than the heat distortion temperature. Then, the resin 14 is moved to the lower mirror surface piece 15 at the finishing position.
When it is detached from the upper mirror pieces 16a to 16f and the upper mirror pieces 16a to 16f, the temperature suddenly drops and drops to room temperature.

Therefore, the molten resin 14 is supplied to the mirror processing section 12 by the lower mirror pieces 15a to 15f and the upper mirror pieces 16a.
The pressure is gradually increased while moving from the initial position to the finishing position over a predetermined period of time until the thickness of the lens becomes normal through 16f, and the lens is cooled to a temperature equal to or lower than the heat deformation temperature. As a result, the resin molding device 10 is a small and inexpensive device, and can continuously and accurately mold a molded product having a lens (mirror surface) having a predetermined length.

By repeating the above steps sequentially, a molded product having a large number of lenses (mirror surfaces) with the lower mirror surface pieces 15a to 15f and the upper mirror surface pieces 16a to 16f smaller in number than the number of mirror surfaces to be formed. It can be molded, and a molded article having a lens (mirror surface) can be continuously molded with high precision using a small and inexpensive resin molding apparatus 20.

In this case, if there are at least two lower mirror pieces 15a to 15f and two upper mirror pieces 16a to 16f,
Although molding can be performed, lower mirror pieces 15a to 15f can be formed.
If the number of the upper mirror pieces 16a to 16f is small, the resin 14 cannot be cooled sufficiently, and the lens surface may be broken due to the influence of the temperature distribution, and the lower mirror pieces 15a to 15f may be damaged.
f and the number of the upper mirror pieces 16a to 16f are small, the productivity is reduced, and the lower mirror pieces 15a to 15f and the upper mirror pieces 16a to 16f are reduced.
The larger the number of a to 16f, the more accurately and efficiently the molding can be performed. For example, a set of lower mirror pieces 15a to 15
Assuming that the time for performing the lens processing with the f and the upper mirror pieces 16a to 16f is 20 seconds, two sets of the lower mirror pieces 15a to 15f and the upper mirror piece 1 are required to form 200 lenses.
6a to 16f, the molding time is 200
It takes 0 seconds and 50 sets of lower mirror pieces 15a-1
When molded using 5f and upper mirror pieces 16a to 16f,
The molding time will be 80 seconds.

Therefore, the numbers of the lower mirror pieces 15a to 15f and the upper mirror pieces 16a to 16f are appropriately set based on the number of mirror surfaces to be formed and the production cost.

As described above, when the resin molding apparatus 10 is used, a molded product can be continuously obtained. Therefore, the required number of mirror surfaces can be obtained freely at the cut portion. There is no need to arrange dies and molding machines according to the number of surfaces, and molding costs can be greatly reduced. In addition, in injection molding, the flow length and pressure distribution of the resin occur due to the effect of cooling and solidification of the resin, resulting in poor filling,
The shape accuracy deteriorates, and the length of the molded product must be limited. However, since the resin molding apparatus 10 of the present embodiment sequentially and continuously processes the resin 14, it is possible to efficiently perform long molding with good shape accuracy and improve the quality of a molded product. Can be.

Furthermore, the resin molding apparatus 10 can gently raise and cool the temperatures of the lower mirror pieces 15a to 15f and the upper mirror pieces 16a to 16f, reduce the temperature distribution and the pressure distribution, and reduce the internal strain and the like. By reducing the refractive index distribution, it is possible to reduce the variation in the contraction rate. As a result, the quality of the molded product can be further improved.

In the present embodiment, the lower mirror pieces 15a to 15f and the upper mirror pieces 16a to 16f are gradually cooled while moving from the initial position to the finishing position. The method is not limited to the above. For example, lower mirror pieces 15a to 15f and upper mirror piece 1
The temperatures 6a to 16f may be heated to the glass transition temperature from the initial position to a predetermined position, and then cooled to the heat deformation temperature or lower while moving to the finishing position. By doing so, the mirror surface can be formed with even higher precision.

FIG. 3 and FIG. 4 are views showing a second embodiment of the resin molding method of the present invention. In this embodiment, after joining resin blocks, a plurality of mirror surfaces are arrayed. The molded article having a shape is formed, wherein the molded article is formed.
It corresponds to.

FIG. 3 is a front sectional view of a resin molding apparatus 20 to which the second embodiment of the resin molding method of the present invention is applied.

In FIG. 3, the resin molding apparatus 20 includes a resin block supply section 21, a joining section 22, a mirror-finished section 23 and the like, and the resin block supply section 21 applies the resin block supplied to the joining section 22 to the joining section. At 22, the resin bonded at the mirror-finished portion 23 is mirror-finished.

The resin block supply section 21 sequentially supplies the resin blocks 24 in a solidified state having a predetermined size to the joining section 22. This resin block 24 is formed so that the joint of the resin blocks 24 does not become a lens surface (mirror surface).
It is desirable to have a length that is a multiple of the pitch of the lens to be molded.

The joining portion 22 is formed by heating and pressing portions 25a, 25b
The end faces of the resin block 24 supplied from the resin block supply section 21 are sequentially joined by heat welding at the heating press sections 25a and 25b, and the resin block 24 is formed as a continuous resin 26 to the mirror-finished section 23. Supply.

The joining portion 22 is not limited to one that joins the resin blocks 24 by heat welding. For example, the joining portion 22 may be one that is joined by ultrasonic welding using ultrasonic vibration or bonding with an adhesive. good.

As in the case of the mirror finishing section 12 of the first embodiment, the mirror finishing section 23 includes a plurality of lower mirror pieces 27a to 27a.
27f and a plurality of upper mirror pieces 28a to 28f, and lower mirror pieces 27a to 27f and upper mirror pieces 28a to 28f.
8f are arranged in a state where they face each other in pairs, and the surfaces facing each other are formed in a mirror-like shape. Each lower mirror piece 27a to 27f and upper mirror piece 28a to 28f
Are held by a holding mechanism (not shown), and are arranged opposite to each other at an initial position (a position in FIG. 3) which is the left end of the mirror-finished portion 23 in FIG. 3 is sequentially moved from left to right at a predetermined constant speed as shown by an arrow in FIG. 3, and a finishing position (the right end of the mirror-finished portion 23 in FIG. 3) is moved downward and upward by the holding mechanism as shown by the arrows in FIG. 3, respectively, and is separated. In the separated state, the initial position of the left end is again shown by the arrows in FIG. The resin 26 is moved to the position and the resin 26 is formed in the same manner as described above.

Although not shown, the mirrored portion 23 is
Lower mirror piece 27a-27f and upper mirror piece 28a-28f
The temperature control mechanism individually heats the lower mirror pieces 27a to 27f and the upper mirror pieces 28a to 28f to a temperature equal to or higher than a predetermined glass transition temperature at an initial position. , While being moved by a predetermined amount, is kept at a temperature equal to or higher than the glass transition temperature, and then cooled while moving to the finishing position.
Before the a-27f and the upper mirror pieces 28a-28f are moved to their initial positions, they are heated to a temperature higher than the glass transition temperature.

Next, the operation of the present embodiment will be described. In the resin molding apparatus 20, when molding, the resin block supply unit 21 sequentially supplies the resin block 24 to the joining unit 22, and the joining unit 2
2 joins the end faces of the resin block 24 supplied from the resin block supply unit 21 and supplies the resin block 26 as a continuous resin 26 to the mirror finishing unit 23. The resin block 24 is made of, for example, polycarbonate or the like, and is heated and fused to a temperature of 180 ° C. or higher at the joining portion 22 by heat welding.

When the continuous resin 26 is supplied from the joining portion 22, the mirror-finished portion 23 returns to the lower mirror surface piece 27 at the initial position.
a to 27f and the resin 26 supplied from the upper mirror pieces 28a to 28f are pressurized while being heated to a temperature equal to or higher than the glass transition temperature, so that the resin 2 is moved from the initial position (the position in FIG. 3).
6 is moved at a constant speed in the direction of the finishing position (the position in FIG. 3) while gradually pressurizing the resin 26 while heating and maintaining the temperature until the thickness of the lens becomes a regular lens thickness. The lower mirror pieces 27a to 27f and the upper mirror pieces 28a to 28f are cooled by the control mechanism to gradually lower the temperature, and at the position before the finishing position,
Reduce to a temperature below the heat distortion temperature.

After that, the mirror-finished portion 23 moves the lower mirror piece 2
When the 7a to 27f and the upper mirror pieces 28a to 28f are moved while being cooled and moved to the finishing position, the lower mirror pieces 27a to 27f and the upper mirror pieces 28a to 28f are moved as shown by arrows in FIG. It is moved downward and upward to separate it from the resin 26 and returns to the initial position via the position shown in FIG. At this time, the mirror-finished portion 23 is
The lower mirror pieces 27a to 27f and the upper mirror pieces 28a to 28f are heated to a temperature equal to or higher than the glass transition temperature while the a to 27f and the upper mirror pieces 28a to 28f are returned from the finishing positions to the initial positions.

The above operation processing is continuously performed, and the lower mirror pieces 27a to 27f and the upper mirror pieces 28a to 28f are moved at a constant speed from the initial position to the finishing position.
6 is gradually pressurized until it becomes a regular lens thickness. Further, in this case, the lower mirror pieces 27a to 27f and the upper mirror pieces 28a to 28f are heated to the glass transition temperature or higher at the initial position, and are maintained at the temperature or higher from the initial position to the glass transition temperature. It cools while moving to the position, and when it reaches the finishing position, it cools to the heat deformation temperature or lower. Then, the resin block 24 supplied from the resin block supply section 21 to the joining section 22 is joined at the joining section 22 to supply the resin 26 and the resin 26 to be supplied to the mirror processing section 23 and the lower mirror pieces 27a to 27f and the upper part. The speed at which the mirror pieces 28a to 28f move is kept constant.

In the above operation process, the resin 26
For example, in the case of polycarbonate, as shown in FIG. 4, the temperature is the room temperature at a position where the resin block is supplied from the resin block supply unit 21 to the joining unit 22. As described above, the glass substrate is temporarily heated to the glass transition temperature or higher by heat welding, but drops to room temperature while being transported to the mirror-finished portion 23. After that, the mirror processing section 23
Since the lower mirror pieces 27a to 27f and the upper mirror pieces 28a to 28f at the initial positions are heated to the glass transition temperature or higher, as shown in FIG.
The resin 26 is heated to a temperature equal to or higher than the glass transition temperature, and is maintained at a temperature equal to or higher than the glass transition temperature until passing through the position shown in FIG. Thereafter, the resin 26 is cooled to about 130 ° C., which is lower than the heat distortion temperature, as shown as the temperature from the temperature in FIG. As shown as temperature, lower mirror pieces 27a-27f and upper mirror pieces 28a-28f
At the time of release, the temperature drops to a temperature between the heat distortion temperature and room temperature.

Therefore, the resin 26 is applied to the mirror-finished portion 23
The lower mirror pieces 27a-27f and the upper mirror pieces 28a-2
8f, the pressure is continuously and gradually increased while moving from the initial position to the finishing position over a predetermined period of time until the lens thickness becomes regular, and after being heated to the glass transition temperature or higher, the heat distortion temperature It is gradually cooled to the following temperature. As a result, the resin molding device 20 is a small and inexpensive device, and can continuously and accurately mold a molded product having a lens (mirror surface) having a predetermined length.

Then, by repeating the above process sequentially, the number of lower mirror pieces 27 smaller than the number of mirror surfaces is reduced.
A molded product having a large number of lenses (mirror surfaces) can be molded by a to 27f and the upper mirror pieces 28a to 28f, and a molded product having a lens is continuously molded with high precision by a small and inexpensive resin molding apparatus 20. be able to.

In this case, similarly to the first embodiment, the lower mirror pieces 27a to 27f and the upper mirror pieces 28a to 28
8f, molding can be performed if there are at least two pieces, but the lower mirror pieces 27a to 27f and the upper mirror pieces 28a
If the number of 少 な い 28f is small, the resin 26 cannot be sufficiently cooled, and the mirror surface may be broken due to the influence of the temperature distribution,
Also, lower mirror pieces 27a to 27f and upper mirror pieces 28a to
If the number of 28f is small, the productivity decreases, and the lower mirror piece 2
7a to 27f and the upper mirror pieces 28a to 28f can be formed more accurately and more efficiently as they are more.

Therefore, the number of the lower mirror pieces 27a to 27f and the upper mirror pieces 28a to 28f are appropriately set based on the number of mirror surfaces to be formed and the production cost.

As described above, since the molded product can be obtained continuously by using the resin molding apparatus 20, the required number of mirror surfaces can be freely obtained at the cut portion. There is no need to arrange dies and molding machines according to the number of surfaces, and molding costs can be greatly reduced. In addition, in injection molding, the flow length and pressure distribution of the resin occur due to the effect of cooling and solidification of the resin, resulting in poor filling,
The shape accuracy deteriorates, and the length of the molded product must be limited. However, since the resin molding apparatus 10 of the present embodiment sequentially and continuously processes the resin 26, it is possible to efficiently perform long molding with good shape accuracy and improve the quality of a molded product. Can be.

Further, the resin molding apparatus 20 can gently raise and cool the temperatures of the lower mirror pieces 27a to 27f and the upper mirror pieces 28a to 28f, reduce the temperature distribution and the pressure distribution, and reduce the internal distortion and the like. By reducing the refractive index distribution, it is possible to reduce the variation in the contraction rate. As a result, the quality of the molded product can be further improved.

FIGS. 5 to 8 are views showing a third embodiment of the resin molding method of the present invention. The present embodiment relates to a method of forming a molded article having a mirror surface on a resin block. In addition, an empty wall is formed in the resin block as an escape portion for allowing excess resin to escape, and corresponds to claim 10.

FIG. 5 is a perspective view of a main part of a resin molding apparatus 30 to which the third embodiment of the resin molding method according to the present invention is applied.

In FIG. 5, the resin molding apparatus 30 includes a mirror processing section 33 having a plurality of lower mirror pieces 31 and an upper mirror piece 32 disposed opposite to a resin block supply section (not shown). The resin block supply unit supplies the sheet-shaped resin block 34 to the mirror processing unit 33.

In the sheet-shaped resin block 34, an empty wall (relief portion) 35 is formed between the mirror surface forming portion 34a and the excess resin during molding to escape.

The resin molding apparatus 30 is provided with a mirror forming section 34.
The sheet-like resin block 34 in which the empty wall 35 is formed between the resin block supply part 34a and the mirror surface forming part 34a is conveyed from the resin block supply part to the mirror processing part 33, and the mirror processing part 33 The sheet-like resin block 34 is pressed and heated by the lower mirror piece 31 and the upper mirror piece 32 to form a mirror surface on the sheet resin block 34.

At this time, an empty wall 35 is formed in the sheet-shaped resin block 34 between the mirror surface forming portion 34a where the mirror surface is formed and the excess resin during molding to escape. Therefore, as shown in FIG. 7, excess resin escapes to the empty wall 35 between the mirror surface forming portions 34a and between the mirror surface forming portions 34a and does not rise, so that the quality of the molded product can be improved.

That is, as shown in FIG. 8, the sheet-shaped resin block 36 is formed by the mirror surface forming portion 36a and the mirror surface forming portion 36.
If no empty wall is formed between a and a to allow excess resin to escape during molding, the sheet-shaped resin block 36 is
As shown in FIG. 9, when a mirror surface is formed by heating and pressing with the lower mirror piece 31 and the upper mirror piece 32, an extra space is formed between the adjacent lower mirror piece 31 and the upper mirror piece 32 as shown in FIG. Resin 37 accumulates and the mirror surface forming portion 36 of the molded product
The extra resin 37 is raised between the a and the mirror surface forming portion 36b. For this reason, there is a possibility that the optical characteristics of the molded product may be affected, and that the molded product may be obstructed during assembly.

However, the resin molding apparatus 3 of the present embodiment
0 indicates that an empty wall 35 is formed between the mirror surface forming portion 34a of the sheet-shaped resin block 34 and the mirror surface forming portion 34a.
As described above, when the mirror processing section 33 heats and presses the lower mirror piece 31 and the upper mirror piece 32, the excess resin
It is possible to prevent the unnecessary resin from escaping and to build up excess resin. As a result, the optical characteristics of the molded product can be improved, and at the same time, the workability of the assembling operation can be improved by preventing the molded product from being disturbed at the time of assembling.

In the above embodiments, the case where a spherical surface is formed has been described. However, the surface to be formed is not limited to a spherical surface. For example, as shown in FIG.
The lower mirror piece 41 is a square mirror piece forming a square shape,
The upper mirror piece 42 may be a spherical mirror piece that forms a spherical surface, and may have another shape.

Although the invention made by the present inventor has been specifically described based on the preferred embodiments, the present invention is not limited to the above, and various modifications can be made without departing from the gist of the invention. It goes without saying that it is possible.

[0088]

According to the resin molding method of the first aspect of the present invention, when molding a plurality of molded products having a predetermined surface shape arranged in an array or sheet shape, a mirror surface portion corresponding to the surface shape to be molded. It is possible to approach and separate in the state of facing each other, and by a number smaller than the number of surface shapes to be molded, a plurality of pairs are arranged in a predetermined direction from a predetermined initial position to a finishing position and movable in the direction. Mirror surface pieces are disposed, and the plurality of pairs of mirror surface pieces move at a predetermined speed from the initial position to the finishing position while sequentially pressing the resin that is continuously supplied, and move to the finishing position to separate the resin. After being separated and molded, it is moved to the initial position and resin molding is performed again, so a molded product having a continuous surface shape with a smaller number of mirror surface pieces than the number of surface shapes to be molded is molded with high precision. Low cost and high precision It is possible to form the plurality aligned molded articles in an array or sheet.

According to the resin molding method of the present invention, when molding a plurality of molded products having a predetermined surface shape arranged in an array or a sheet, a mirror surface portion corresponding to the surface shape to be molded is provided. A plurality of pairs are arranged so as to be able to approach and separate from each other in a state where they face each other, and to move at a predetermined speed in the direction from a predetermined initial position to a finishing position in a predetermined direction by a number smaller than the number of surface shapes to be formed. Is provided, the molten resin heated above the glass transition temperature of the amount required for molding in accordance with the moving speed of the plurality of pairs of mirror pieces is supplied to the initial position, and a plurality of pairs of mirror pieces are provided. The supplied molten resin is moved while being pressurized from the initial position to the finishing position sequentially, and when it is moved to the finishing position, it is separated and the resin is separated and molded, then moved to the initial position, and the resin molding is performed again. So the surface shape to be molded The molten resin is pressurized while moving sequentially with a smaller number of mirror pieces than the number of pieces, and a molded product having a continuous surface shape can be molded with high precision, and it is inexpensive and highly accurate in the form of an array or sheet. A plurality of molded articles can be formed.

According to the resin molding method of the present invention, a plurality of pairs of mirror pieces are pressed from the initial position to the finishing position while pressing the molten resin heated above the glass transition temperature to a predetermined thickness. Since the molten resin is cooled to a temperature below the thermal deformation temperature while moving and moving from the initial position to the finishing position, it is possible to form a molded product with a surface shape that is continuous and appropriately inexpensive with high precision. Can be
A plurality of molded products arranged in an array or a sheet can be formed at lower cost and with higher precision.

According to the resin molding method of the fourth aspect of the present invention, a plurality of pairs of mirror pieces are heated to a predetermined thickness while maintaining the molten resin heated above the glass transition temperature above the glass transition temperature. While moving from the initial position to the finishing position while pressing, the molten resin is cooled to a temperature below the heat deformation temperature while moving to the finishing position, so the temperature change is smoothed and higher accuracy Thus, a molded product having a continuous surface shape can be formed, and a plurality of molded products arranged in an array or a sheet can be formed inexpensively and with higher precision.

According to the resin molding method of the present invention, when a plurality of molded products having a predetermined surface shape arranged in an array or sheet shape are formed, a mirror surface portion corresponding to the surface shape to be molded is provided. A plurality of pairs are arranged so as to be able to approach and separate from each other in a state where they face each other, and to move at a predetermined speed in the direction from a predetermined initial position to a finishing position in a predetermined direction by a number smaller than the number of surface shapes to be formed. After a resin block of a predetermined size is joined by a predetermined method, a plurality of mirror surface pieces are supplied to an initial position in an amount required for molding according to a moving speed of the plurality of mirror surface pieces. Then, the supplied bonded resin block is moved from the initial position to the finishing position while heating and pressurizing to a temperature equal to or higher than the glass transition, while being moved to the finishing position. Move to position Then, since the resin molding is performed again, the solid resin block joined is heated and pressed while sequentially moving with a smaller number of mirror pieces than the number of the surface shapes to be molded to form a continuous surface shape. Products can be molded with high precision, and a plurality of molded products arranged in an array or a sheet can be molded at low cost and with high precision.

According to the resin molding method of the present invention, a plurality of pairs of mirror pieces are pressed to a predetermined thickness while heating the joined resin block to a temperature equal to or higher than the glass transition. Move from the initial position to the finishing position,
Thereafter, while moving to the finishing position, the resin is cooled to a temperature equal to or lower than the thermal deformation temperature, so that the temperature change can be smoothed and a molded product having a continuous surface shape can be formed with higher precision. It is possible to form a plurality of molded products arranged in an array or a sheet at low cost and with higher precision.

According to the resin molding method of the present invention, since the joining of the resin blocks is performed by heat welding, the resin blocks can be joined inexpensively and appropriately, and inexpensively and with high precision. A plurality of molded articles arranged in an array or sheet can be formed.

According to the resin molding method of the present invention, since the joining of the resin blocks is performed by using the ultrasonic vibration, the resin blocks can be joined more appropriately and inexpensively. A plurality of molded products arranged in an array or a sheet can be molded with high precision and high accuracy.

According to the resin molding method of the ninth aspect of the present invention, since the resin blocks are joined by using the adhesive, the resin blocks can be joined more cheaply and appropriately, and the cost can be reduced. In addition, a plurality of molded products arranged in an array or a sheet can be molded with high precision.

According to the resin molding method of the present invention, the resin before molding is transferred to a region other than the portion where the surface shape is molded by the mirror-finished piece. Since the formed solid is used, it is possible to prevent unnecessary resin from protruding into the molded product, and it is possible to further improve the quality of the molded product.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a main part of a resin molding apparatus to which a first embodiment of a resin molding method according to the present invention is applied.

FIG. 2 is a diagram showing a temperature change of a resin in each part of the injection molding apparatus of FIG. 1;

FIG. 3 is a front sectional view of a main part of a resin molding apparatus to which a second embodiment of the resin molding method of the present invention is applied.

FIG. 4 is a diagram showing a temperature change of a resin in each part of the injection molding apparatus of FIG. 3;

FIG. 5 is a perspective view of a main part of a resin molding apparatus to which a third embodiment of the resin molding method according to the present invention is applied.

FIG. 6 is an enlarged front cross-sectional view of a main part in a state where heating and pressurization of a sheet-like resin block having an empty wall formed by the resin molding apparatus of FIG. 5 is started.

FIG. 7 is an enlarged front cross-sectional view of a main part in a state where heating and pressurization of a sheet-shaped resin block having an empty wall formed by the resin molding apparatus of FIG. 6 has been completed;

8 is a perspective view of a main part in a state in which a sheet-shaped resin block having no empty wall is formed by the resin forming apparatus of FIG. 5;

FIG. 9 is an enlarged front cross-sectional view of a main part in a state where heating and pressurization of a sheet-shaped resin block having no empty wall has been started from the resin molding apparatus of FIG. 8;

FIG. 10 is an enlarged front cross-sectional view of a main part in a state where heating and pressurization of a sheet-like resin block having no empty wall formed by the resin molding apparatus of FIG. 9 is completed.

FIG. 11 is an enlarged front sectional view of a main part showing another example of a mirror piece having a different mirror surface shape.

FIG. 12 is a front sectional view of a conventional injection molding apparatus.

FIG. 13 is a front sectional view of a conventional large-sized injection molding apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Resin molding apparatus 11 Extruded part 12 Mirror processing part 13 Resin supply path 14 Molten resin 15a-15f Lower mirror piece 16a-16f Upper mirror piece 20 Resin molding device 21 Resin block supply part 22 Joining part 23 Mirror processing part 24 Resin block 25a , 25b Heat pressing part 26 Resin 27a-27f Lower mirror piece 28a-28f Upper mirror piece 30 Resin molding device 31 Lower mirror piece 32 Upper mirror piece 33 Mirror processing part 34a Mirror forming part 35 Empty wall

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F202 AC03 AH75 CA09 CB02 CC02 CC05 4F204 AH74 AH75 FA02 FB02 FG08 FN11 FN15 FN20 FQ11 FQ12 FQ15 4F213 AH74 AH75 WA06 WA33 WA55 WA84 WB02 WC02 WF23 WK01

Claims (10)

[Claims] 1. A resin molding method for molding a plurality of molded articles having a predetermined surface shape arranged in an array or sheet.
Mirror pieces which have mirror surfaces corresponding to the surface shape to be formed and are disposed so as to be close to and separated from each other in a state of being opposed to each other are finished from a predetermined initial position by a number smaller than the number of the surface shapes to be formed. The plurality of pairs of mirror pieces are moved at a predetermined speed from the initial position to the finishing position while sequentially applying pressure to the resin that is continuously supplied. And moving to the finishing position, separating and molding the resin, moving to the initial position, and molding the resin again. 2. A resin molding method for molding a plurality of molded products having a predetermined surface shape arranged in an array or sheet.
Mirror pieces which have mirror surfaces corresponding to the surface shape to be formed and are disposed so as to be close to and separated from each other in a state of being opposed to each other are finished from a predetermined initial position by a number smaller than the number of the surface shapes to be formed. The molten resin is disposed so as to be movable at a predetermined speed in the direction in a predetermined direction along with the position, and heated to a glass transition temperature equal to or higher than an amount required for molding according to the moving speed of the plurality of mirror pieces. Supply to the initial position, the plurality of pairs of mirror surface pieces move at the moving speed while sequentially pressing the supplied molten resin from the initial position to the finishing position, and move to the finishing position, separated from each other. A resin molding method, wherein the resin is removed and molded, then moved to the initial position, and the resin is molded again. 3. The plural pairs of mirror-finished pieces move from the initial position to the finishing position while pressing the molten resin heated to the glass transition temperature or higher to a predetermined thickness, and perform the finishing from the initial position. The resin molding method according to claim 2, wherein the molten resin is cooled to a temperature equal to or lower than a heat deformation temperature while moving to a position. 4. The method according to claim 1, wherein the plurality of pairs of mirror-finished pieces move from the initial position to the finishing position while pressing the molten resin heated above the glass transition temperature to a predetermined thickness while maintaining the temperature above the glass transition temperature. 3. The resin molding method according to claim 2, wherein the molten resin is cooled to a temperature equal to or lower than a thermal deformation temperature while moving to the finishing position. 5. A resin molding method for molding a plurality of molded products having a predetermined surface shape arranged in an array or sheet.
Mirror pieces which have mirror surfaces corresponding to the surface shape to be formed and are disposed so as to be close to and separated from each other in a state of being opposed to each other are finished from a predetermined initial position by a number smaller than the number of the surface shapes to be formed. After the resin blocks having a predetermined size are joined by a predetermined method and arranged in a predetermined direction so as to be movable in a predetermined direction along with the position, an amount required for molding in accordance with the moving speed of the plurality of pairs of mirror surface pieces. At the initial position, and the plurality of pairs of mirror pieces move at the moving speed while heating and pressing the supplied bonded resin blocks from the initial position to the finishing position at a temperature equal to or higher than the glass transition temperature. Then, when moving to the finishing position, after separating and molding the resin is separated, moved to the initial position,
A resin molding method, wherein the resin is molded again. 6. The pair of mirror pieces move from the initial position to the finishing position while applying pressure to a predetermined thickness while heating the joined resin block to a temperature equal to or higher than the glass transition. The resin molding method according to claim 5, wherein the resin is cooled to a temperature equal to or lower than a heat deformation temperature while moving to the finishing position. 7. The resin molding method according to claim 5, wherein the joining of the resin blocks is performed by heat welding. 8. The resin molding method according to claim 5, wherein the joining of the resin blocks is performed using ultrasonic vibration. 9. The resin molding method according to claim 5, wherein the joining of the resin blocks is performed using an adhesive. 10. The resin before molding is a solid in which a relief portion for absorbing excess resin during molding is formed in a region other than a portion where the surface shape is molded by the mirror surface piece. The resin molding method according to claim 1 or any one of claims 5 to 9.