JP2015182283A - Method of manufacturing mold - Google Patents

Abstract

A method for manufacturing a mold that can be manufactured in a short time is provided.
Manufacturing of a mold in which resin (P, R) or metal powder (P) is laminated on a base (11, 21), and a laminated part (10, 20) is formed on the base (11, 21). Is the method. The direction substantially perpendicular to the lamination direction of the resin (P, R) or the metal powder (P) is defined as the penetration direction. In the modeling step (S1), the outer periphery of the laminated portion (10, 20) is formed on the base (11, 21) having a plurality of protrusions (15, 25) having through holes (14, 24) penetrating in the penetration direction. The layered portion (10, 20) is formed using a method for forming a three-dimensional shape so as to have the communication hole (18, 28) by being connected to the through hole (14, 24). In the fixing step (S2), the restraining rods (10, 29) are inserted into the through holes (14, 24) and the communication holes (18, 28).
[Selection] Figure 3

Description

  The present invention relates to a mold manufacturing method, and more particularly, to a mold manufacturing method using a three-dimensional shaped object forming method.

  The powder layer is irradiated with a light beam and sintered or melted to form a solidified layer, and a new solidified layer is similarly formed on the solidified layer by light beam irradiation, and this is repeated. There is a modeling method for a three-dimensional shape to manufacture a three-dimensional shape.

  For example, in the method for modeling a three-dimensional object disclosed in Patent Document 1, a three-dimensional object is manufactured by forming the solidified layer on a pin provided on a modeling table. It is stated that the problem that the bottom surface of the three-dimensional modeled object is affected by the surface shape of the modeling plate can be solved by performing it on the pin. Furthermore, it is stated that a mold obtained using such a manufacturing method can be used as a mold, for example.

JP 2010-100844 A

  By the way, it is required to manufacture the mold in a short time. In the method for modeling a three-dimensional object disclosed in Patent Document 1, there is room for shortening the manufacturing time.

  The present invention has been made against the background described above, and is to provide a mold manufacturing method that can be manufactured in a short time.

The mold manufacturing method according to the present invention includes:
A method for producing a mold in which a resin or metal powder is laminated on a base, and a laminated portion (for example, a laminated mold) is formed on the base,
When the direction substantially perpendicular to the lamination direction of the resin or the metal powder is a substantially vertical direction,
On the base including a plurality of protrusions having through holes penetrating in the substantially vertical direction,
Forming the laminated part using a three-dimensional shaped article forming method so as to have a communication hole penetrating the outer periphery of the laminated part by connecting to the through hole;
Inserting a restraining rod into the through hole and the communication hole;
including.

  According to such a configuration, the mold can be manufactured in a short time.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the type | mold which can manufacture a type | mold in a short time can be provided.

It is a fragmentary sectional view of a type | mold. It is a side view of the principal part of a type | mold. It is a side view of a press die. It is a schematic diagram of an example of a manufacturing apparatus. FIG. 3 is a schematic diagram showing one step of the manufacturing method according to the first embodiment. It is a graph which shows the manufacturing time with respect to a manufacturing method. It is a schematic diagram of an example of a manufacturing apparatus. It is a schematic diagram of an example of a manufacturing apparatus.

Embodiment 1 FIG.
The type | mold concerning Embodiment 1 is demonstrated with reference to FIG.1 and FIG.2. FIG. 1 is a partial sectional view of a mold. FIG. 2 is a side view of the main part of the mold. FIG. 3 is a side view of the press die.

  As shown in FIG. 1, the resin mold 10 includes a base 11 made of a resin and a laminated mold 16 laminated on a laminated surface 12 of the base 11.

  As shown in FIG. 2, the base 11 has a plurality of protrusions 15 protruding on the laminated surface 12 and a plurality of bar support portions 13 protruding in the same direction as the protrusions 15.

  The protrusion 15 is, for example, a square columnar body having a height of 10 mm, a width, and a depth of 5 mm. The protrusions 15 are provided in at least one line on the laminated surface 12 of the base 11, and the interval between the protrusions 15 is, for example, 10 mm. The protrusion 15 is made of, for example, carbon steel such as S45C defined by JIS standard or an equivalent material thereof. The protrusion 15 has a through hole 14, and the through hole 14 passes through the center of the protrusion 15 or the vicinity thereof. The through hole 14 has a diameter of 2 mm, for example. The through hole 14 penetrates in the direction along the laminated surface 12 of the base 11. That is, the through hole 14 penetrates in a direction substantially perpendicular to the stacking direction in which the stacked molds 16 are stacked. Here, “substantially vertical” means, for example, 70 to 110 °.

  The rod support portion 13 is a rod-like body provided on the base 11 with an interval from both ends of the row of protrusions 15. For example, the rod support portion 13 has a diameter of 100 mm and is made of carbon steel such as S45C or an equivalent material defined in JIS standards. The rod support portion 13 has a support hole (not shown) penetrating in the direction along the laminated surface 12 of the base 11, and the support hole passes through the center of the rod support portion 13 or the vicinity thereof. The support hole has a diameter of 2 mm, for example.

  Referring again to FIG. 1 in conjunction with FIG. 2, the laminated mold 16 has a molding surface 17 for molding a workpiece on the upper surface. The stacked mold 16 has a communication hole 18, and the communication hole 18 penetrates the outer periphery of the stacked mold 16. Specifically, the communication hole 18 and the through hole 14 are connected to form one continuous hole. This hole penetrates the outer periphery of the laminated mold 16. That is, the rod-shaped body having a smaller diameter than the communication hole 18 and the through hole 14 can pass through this one continuous hole. The laminated mold 16 is made of, for example, a photocurable resin such as an ultraviolet curable resin.

  The restraining bar 19 is inserted into the communication hole 18 and the through hole 14, and both ends thereof are inserted into the support holes of the bar support part 13, thereby being supported by the bar support part 13. The restraining rod 19 is made of, for example, carbon steel such as S45C defined by JIS standards or an equivalent material thereof. Moreover, the restraining rod 19 is 2 mm in diameter, for example.

  As shown in FIG. 3, the resin mold 10 is attached to the metal base holding part 1 and used as a lower mold of a press mold. Further, a resin mold 20 corresponding to the resin mold 10 is prepared. The resin mold 20 has the same configuration as the resin mold 10 except that it has a molding surface 27 corresponding to the molding surface 17 of the resin mold 10. The resin mold 20 is attached to the metal base holding part 2 and used as an upper mold of a press mold. When the resin mold 10, the metal base holding part 1, the resin mold 20 and the metal base holding part 2 are respectively attached to a press machine (not shown), the resin mold 10 and / or the resin mold 20 are moved in contact with each other, Press working can be performed. For example, the workpiece W can be placed between the resin molds 10 and 20 and the workpiece W can be pressed into a shape corresponding to the molding surfaces 17 and 27.

Production method.
Next, the manufacturing method according to the first embodiment will be described with reference to FIGS. FIG. 4 is a schematic diagram of an example of a manufacturing apparatus. FIG. 5 is a schematic diagram illustrating one process of the manufacturing method according to the first embodiment.

  First, an optical modeling apparatus was used in the layered modeling process of this manufacturing method. The optical modeling apparatus is an apparatus for performing an optical modeling method which is an example of a modeling method for a three-dimensional shape. As illustrated in FIG. 3, the optical modeling apparatus 100 includes a tank 101, a base support portion 102, a galvanometer mirror 103, and a laser oscillator 104.

  The tank 101 is, for example, a tank that holds the photocurable resin R. The photocurable resin R is an ultraviolet curable resin such as an epoxy resin, for example.

  The base support unit 102 includes a main body 121 fixed in the vicinity of the tank 101, a drive unit 122 driven up and down by the main body 121, and an arm 123 assembled to the drive unit 122. The drive unit 122 is driven up and down while the arm 123 supports the base 11. Thereby, the base support part 102 can move the base 11 up and down and put it in and out of the tank 101.

  The galvanometer mirror 103 is rotatably installed above the tank 101. The laser oscillator 104 oscillates a laser that cures the photocurable resin R. Further, the laser oscillator 104 is installed so as to irradiate the galvanometer mirror 103. Here, the galvanometer mirror 103 rotates while receiving the laser from the laser oscillator 104. Then, the galvanometer mirror 103 reflects the laser and makes it incident on or above the base 11. The photocurable resin R on the liquid surface on or above the base 11 is solidified by a laser. Based on the shape of the laminated mold 16, the angle of the galvanometer mirror 103, the start and stop of laser irradiation of the laser oscillator 104, and the like are controlled.

  First, the laminated mold 16 is formed on the laminated surface 12 of the base 11 using the optical shaping apparatus 100 (stacked shaping process S1). Typically, as shown in FIG. 5, the portions corresponding to the protrusions 15 and the communication holes 18 are not stacked, and only the portion corresponding to the stacked mold 16 excluding the communication holes 18 is stacked. Is formed on the laminated surface 12.

  Subsequently, after taking out the base 11 and the laminated mold 16 from the tank 101, the restraining rod 19 is inserted into the communication hole 18 and the through hole 14 (constraining rod fixing step S2). Further, the restraining rod 19 is inserted into the support hole of the rod support portion 13 and supported.

  The resin mold 10 is obtained through the above steps. According to the manufacturing method concerning Embodiment 1 mentioned above, since it is not necessary to laminate | stack about the part corresponding to the projection part 15, the bar | burr support part 13, and the restraint bar | burr 19 in lamination | stacking type | mold shaping | molding process S1, a type | mold can be formed in a short time. Can be manufactured. In addition, according to the manufacturing method concerning Embodiment 1 mentioned above, the resin mold 20 can be manufactured similarly to the resin mold 10.

  Further, the laminated mold 16 is restrained by the restraining rod 19 and the rod support portion 13, and is difficult to be separated from the base 11 and can be firmly fixed to the base 11. Further, since the protruding portion 15 protrudes from the laminated surface 12, the laminated mold 16 is not easily separated from the base 11 in the direction along the laminated surface 12 and can be firmly fixed to the base 11.

  By the way, there exists the same manufacturing method as the manufacturing method concerning Embodiment 1 mentioned above except the place which used the base which abbreviate | omitted the protrusion part 15, the rod support part 13, and the restraint rod 19 instead of the base 11. FIG. This manufacturing method is called a conventional manufacturing method.

  Here, a mold having a base 11 and a laminated mold was manufactured as a conventional example using a conventional manufacturing method. In the production of the laminated mold, the portions corresponding to the protrusions 15 and the communication holes 18 of the laminated mold 16 were also laminated. Moreover, the resin mold 10 was manufactured as an example using the manufacturing method according to the first embodiment described above. Also in the conventional example and the example, the time taken from the design plan design to the NC machining / finishing was measured, and the result is shown in FIG.

  As shown in FIG. 6, in the conventional example, mold design, NC (Numerical Control) data creation, NC machining / finishing, etc. all took 1-2 days. That is, the lead time is 3 to 6 days. On the other hand, in the example, the mold design required 1-2 days as much as the conventional manufacturing method, while the NC data creation was 0.1-0.5 days, and NC machining / finishing was 0.5 days. Both -1.5 days are shorter than the conventional example. The lead time is 1.6 to 4 days. In the embodiment, it is not necessary to stack the portions corresponding to the protrusions 15, the rod support portions 13, and the restraining rods 19 as compared with the conventional example. Shorter. That is, the manufacturing time of the example is shorter than the manufacturing time of the conventional example.

  In the manufacturing method according to the first embodiment, the optical modeling apparatus 100 is used to form the stacked mold 16, but the powder modeling apparatus 200 shown in FIG. 7 and the hot melt additive manufacturing apparatus 300 shown in FIG. It may be used. 7 and 8 are schematic views of an example of the manufacturing apparatus.

  As illustrated in FIG. 7, the powder modeling apparatus 200 is an apparatus for performing a powder modeling method that is an example of a modeling method for a three-dimensional shape. The powder modeling apparatus 200 includes a powder supply unit 210, a modeling unit 220, a roller 213, and a carbon dioxide laser oscillator 223.

  The powder supply unit 210 includes a cylindrical powder holding tank 211 and a powder extrusion unit 212. The powder holding tank 211 holds the powder P inside. The powder extruding part 212 is slidably disposed inside the powder holding tank 211. As the powder P, resin or metal powder can be used. Examples of the resin include a nylon resin. Examples of the metal powder include powders made of pure metals such as Cu, Ni, and Ti, alloys thereof, or stainless steel.

  The modeling unit 220 includes a cylindrical modeling tank 221 and a base support unit 222. The modeling tank 221 is installed so as to be adjacent to the powder holding tank 211. The base support part 222 is slidably disposed inside the modeling tank 221 and supports the base 11 so as to be vertically movable.

  The roller 213 rolls on the upper end surfaces of the powder holding tank 211 and the modeling tank 221 and can reciprocate from the powder supply unit 210 to the modeling unit 220. The carbon dioxide laser oscillator 223 can irradiate the carbon dioxide laser toward the inside of the modeling tank 221.

  Here, a method for manufacturing the laminated mold 16 on the laminated surface 12 of the base 11 using the powder shaping apparatus 200 will be described. First, the powder extruding part 212 moves upward, and the upper surface of the powder P reaches the upper end of the powder holding tank 211, or digs out from the upper end. The roller 213 rolls to the upper end surface of the powder holding tank 211 to adhere the powder P of the powder holding tank 211 to the peripheral surface thereof. Further, the roller 213 continues to roll toward the modeling tank 221 to adhere the powder P to the laminated surface 12 of the base 11. After the roller 213 passes from the modeling tank 221, the carbon dioxide laser oscillator 223 irradiates the powder P on the laminated surface 12 with a laser to solidify the powder P. Another powder P is supplied onto the solidified powder P, and the powder P is similarly irradiated with a laser to be solidified. This is repeated to form the stacked mold 216. Here, based on the shape of the laminated mold 216, the position of the base support 222, the movement of the carbon dioxide laser oscillator 223, and the like are controlled. In addition, since the lamination mold 216 is formed using the powder P, it is made of resin or metal. Examples of the resin include a nylon resin. Examples of the metal include pure metals such as Cu, Ni, and Ti, alloys thereof, and stainless steel.

  As shown in FIG. 8, the apparatus 300 is an apparatus for performing a hot melt additive manufacturing method that is an example of a method for forming a three-dimensional object. The hot melt additive manufacturing apparatus 300 includes a base fixing portion 301 for fixing the base 11 and a model material head 302 provided above the base fixing portion 301.

  The model material head 302 is installed so that it can move at least in the upper region of the base 11. The model material head 302 has an injection nozzle 303 at its tip, and the injection nozzle 303 injects resin as a model material. Examples of the resin include ABS (Acrylonitrile Butadiene Styrene copolymer) resin. The resin injected as a model material is solidified on the laminated surface 12 of the base 11, and further the resin is injected thereon as a model material. By repeating this, a stacked mold 316 is formed. The movement of the model material head 302 and the injection by the injection nozzle 303 are controlled at the time of injection according to the shape of the stacked mold 316. The injection amount and position of the model material head 302 are controlled according to the shape of the stacked mold 316.

  The hot melt additive manufacturing apparatus 300 may further include a support material head 304. Similar to the model material head 302, the support material head 304 is installed so as to be movable at least in the upper region of the base 11. The support material head 304 has an injection nozzle 305 at its tip, and the injection nozzle 305 injects the support material. The support material is made of, for example, a water-soluble material. When the support material is injected onto the laminated surface 12, the support portion SP1 is formed. After the formation of the support portion SP1, the model material is injected as described above to form the stacked mold 316. Further, after the stacked mold 316 is solidified, the support part SP1 is dissolved in water and removed. In particular, it is preferable to form the portion of the multilayer mold 316 whose area increases upward after the support portion SP1 is formed, because the multilayer mold shape can be stably manufactured. The injection amount and position of the support material head 304 are controlled in accordance with the shape of the support portion SP1.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention. For example, in the above-described embodiment, the optical modeling apparatus 100, the powder modeling apparatus 200, and the hot-melt layered modeling apparatus 300 are used, but an apparatus or a method for manufacturing a three-dimensional shape other than these may be used.

10, 20 Resin molds 11, 21 Bases 12, 22 Laminated surfaces 13, 23 Bar support portions 14, 24 Through holes 15, 25 Protrusions 16, 216, 316 Laminated dies 17, 27 Molded surfaces 18, 28 Communication holes 19, 29 Restraint rod 100 Stereolithography apparatus 200 Powder modeling apparatus 300 Hot melt additive manufacturing apparatus P Powder R Photo-curing resin S1 Stack molding process S2 Restraint rod fixing process

Claims (1)

A method of manufacturing a mold in which a resin or metal powder is laminated on a base and a laminated portion is formed on the base,
When a direction substantially perpendicular to the laminating direction of the resin or the metal powder is a penetration direction,
On the base including a plurality of protrusions having through holes penetrating in the penetration direction,
Forming the laminated part using a three-dimensional shaped article forming method so as to have a communication hole penetrating the outer periphery of the laminated part by connecting to the through hole;
Inserting a restraining rod into the through hole and the communication hole;
A mold manufacturing method including:

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