JPH08277484A - Production of porous forming mold and porous forming mold - Google Patents

Abstract

PURPOSE: To obtain a porous forming mold regularly arranged with vent holes of a uniform diameter by adhering nonconductive spherical bodies to the respective intersected point parts of grid-shaped members to independently form assemblies and mounting these assemblies onto a pattern coated wit a conductive coating material, then executing electroforming. CONSTITUTION: The assemblies 30 are formed by adhering the nonconductive spherical bodies 20 to the respective intersected point parts 28 of the grid-shaped members 25 to form the assemblies in a first stage. The assemblies 30 are mounted to the conductive coating material 36 of the pattern 35 in the second stage. Electroforming layers are formed on the assemblies 30 in a third stage. The mold having the electroforming layers consisting of single layer or plural layers is formed on the pattern 35 by the stage of forming the nonconductive spherical bodies 20 and or the assemblies 30 further on the assemblies 30 at need and a fourth stage of repeating the electroforming of the third stage. The grid-shaped members 25 and the nonconductive spherical bodies 20 are thereafter removed, by which the plural vent holes penetrating through the intersected point parts 12 of the respective grid-shaped communicative holes 6 and the intersected point parts 12 of the grid-shaped communicative holes 6 are formed in the mold.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a porous molding die used as a hollow molding die or an injection molding die for producing a plastic molding, and a press die for producing a fibrous molding layer body. More specifically, the present invention relates to a method for manufacturing a porous molding die, which is capable of regularly arranging a plurality of vent holes formed by electroforming.

[0002]

2. Description of the Related Art First, the structure of a porous mold of this type and an example of its use will be described with reference to FIG. In FIG. 7, this porous molding die 50 has a large number of ventilation holes 50a having a minute diameter, and a grain pattern in a vacuum molding machine 54 in which a vacuum pump 51, a heater 52, and a clamp 53 are arranged. It is equipped with the molding surface formed on the upper side. When using this porous molding die 10 to vacuum-mold an automobile interior part such as a door trim outer skin and a crash pad outer skin, first,
The sheet material 55 is heated and softened by the heater 52, and the sheet material 55 is fixed by a clamp 53 above the molding die. Then, by operating the vacuum pump 51, the air between the sheet material 55 and the molding die 50 is sucked through the ventilation hole 50a to make a vacuum state between the sheet material 55 and the molding die 50, and then the sheet material 55 is molded. Mold 5 attracted to the mold
The sheet material 55 is formed into the same shape as the forming die 55 by making close contact with the forming surface of No. 0.

By the way, in order to obtain a fine inversion property such as a grain pattern, it is desirable that a large number of small vent holes are formed in the mold, and many small vent holes are machined or electric discharge machined. Molding with is not realistic.
Therefore, conventionally, a porous mold is manufactured by the manufacturing method described below.

First, as described in Japanese Patent Application Laid-Open No. 61-163290, a conductive layer is formed on the surface of the pattern of the pattern of the model by silver mirror treatment, and the pattern of the pattern appears on the entire conductive surface. Then, a layer in which particles of polystyrene or the like are laminated is arranged on the entire surface of this conductive layer, and this layer is brought into close contact with the conductive layer by a lifting preventing body. Then, the model is immersed in an electroforming bath of a nickel plating solution, and subjected to electroforming treatment to deposit and stack nickel on the surface of the conductive layer so as to fill the gaps between the particles to form an electroformed shell. Next, the model is taken out of the electroforming tank, the electroformed shell is peeled from the model, and the electroformed shell is immersed in a solvent to elute and remove particles from the electroformed shell, thereby having a large number of vent holes. An electroformed body (porous mold) is manufactured.

Further, as described in JP-A-64-17888, a conductive layer is formed on the surface of the model, and a solvent layer having a predetermined thickness is formed on the conductive layer. Then, a plurality of particles of polystyrene or the like are arranged at desired positions of the solvent layer, the solvent layer is evaporated, and the plurality of particles are melted and fused on the conductive layer in a predetermined arrangement state. After that, the model is immersed in an electrolytic solution containing nickel, copper, etc. in an electroforming tank, and an electroforming treatment is performed to deposit metal such as nickel, copper, etc. so as to fill the intervals between the particles on the surface part of the conductive layer. -Laminate to form an electroformed shell. Next, the model is taken out of the electroforming tank, the electroformed shell is peeled from the model, and the electroformed shell is immersed in a solvent to elute and remove particles from the electroformed shell, thereby having a large number of vent holes. An electroformed body (porous mold) is manufactured.

[0006]

However, in the prior art method for manufacturing a porous mold, a plurality of particles such as polystyrene are arranged at desired positions on the model conductive tank. (C) In order to secure the minute diameter of the ventilation hole, it is usual to use a minute one.
It is difficult to dispose them, and multiple particles come into contact with each other, or the intervals between the particles are narrowed, causing parts that are close to each other, and it becomes impossible to deposit metal by electroforming. There is a problem that it is difficult to manufacture the mold.

In the electroforming process, metal deposition is usually not uniform and deposited. Therefore, as described above, a plurality of particles come into contact with each other or come close to each other. In that case, there is a problem that the metal completely blocks the upper part of the particle or a portion where the metal is hardly deposited is generated, and it is difficult to manufacture an effective porous mold.

Further, a solvent layer is formed on the surface of the model,
When particles of polystyrene or the like are melted and arranged thereon, there is a problem in that the diameter of the vent hole varies depending on the degree of melting, and it is difficult to manufacture an effective porous mold. .

The present invention has been made in order to solve such a problem, and makes it possible to uniformly pass a fluid by regularly arranging ventilation holes and making the ventilation holes have a uniform diameter. It is an object of the present invention to provide a method for producing a porous mold capable of performing the above.

[0010]

In order to solve the above problems, in the method for manufacturing a porous mold and the porous mold of the present invention, in the first aspect, the non-conductivity is provided at each intersection of the lattice members. A first step of bonding the spherical bodies to form an assembly;
It includes a second step of applying a conductive paint on the surface of the model and attaching the assembly to the conductive paint, and a third step of forming an electroformed layer on the assembly. Accordingly, a fourth step in which the step of further attaching the non-conductive spherical body or the assembly and the third step are repeated is performed on the assembly, and one or N layers of electroforming is performed on the model. Mold a layered mold, separate this mold from the model,
The remaining grid-like member and the non-conductive spherical body are removed, and the mold is penetrated through the grid-like communication holes and the intersections of the grid-like communication holes inside the mold, and A plurality of ventilation holes are formed on the surface with a predetermined space therebetween.

According to a second aspect, in addition to the first aspect,
In the fourth step, a non-conductive spherical body is attached on each intersection of the assembly and the third step, and further, if necessary, the non-conductive spherical body is non-conductive. The step of attaching the spherical body and the third step are repeated.

According to a third aspect of the present invention,
The fourth step performs the step of mounting the assembly on each intersection of the assembly so that the intersections are aligned with each other, and the third step, and further, if necessary, further intersections of the assembly. The step of mounting the assembly on the part with the intersections aligned and the third step are repeated.

According to a fourth aspect of the present invention, in the first to third aspects, the first step of adhering a non-conductive spherical body to each intersection of the lattice-like member to form an assembly is the lattice. After fitting the non-conductive spherical body into each placement slot of a member having a plurality of placement slots corresponding to each intersection of the strip-shaped member, the grid-like member is placed in each of the placement slots. This is performed by disposing the non-conducting spheres so that the respective intersections correspond to each other and adhering to the non-conducting spheres.

According to a fifth aspect of the present invention, in each of the first to fourth aspects, a plurality of the lattice members are arranged in parallel in one direction, and a vertical linear portion is arranged in a direction orthogonal to the vertical linear portion. It consists of a horizontal linear part arranged in parallel and multiple,
By varying the distance between the vertical linear portions and the distance between the horizontal linear portions, the distance between the plurality of vent holes is changed.

In a sixth aspect of the present invention, in a porous molding die having a plurality of through holes penetrating the die, each of the plurality of ventilation holes is one of the 1 or N grid-like communicating holes formed in the die. The mold penetrates through the intersections and opens at a predetermined distance from each other on the surface of the mold.

[0016]

As described above, according to the method for producing a porous mold and the porous mold of the present invention, the non-conductive spherical bodies are bonded to the respective intersections of the lattice-like member to form the assembly independently. , The non-conductive spherical body or the assembly is attached on the electrically conductive paint of the model, if necessary, and then the electroforming process is performed, so that the assembly is attached to the model. Just say,
Since multiple ventilation holes can be regularly arranged with extremely simple work, the intervals between the particles of the non-conducting spherical body are narrowed and some parts are close to each other, and these parts are electroformed. It is possible to prevent the metal from being deposited or the metal from completely blocking the upper portion of the non-conductive spherical body.

Further, after fitting the non-conductive spheres into the respective placement slots of the member having a plurality of placement slots, the grid-like member is applied to the respective non-conductive spheres within the placement slots. Since the intersections are arranged so as to correspond to each other and adhere to the non-conducting spherical body, the non-conducting spheres to the intersections of the lattice member can be performed in a short time and with a very simple operation. Can attach and position the body.

Furthermore, by varying the mutual distance between the linear portions of the lattice-like member, the mutual distance between the plurality of non-conducting spherical bodies, and hence the distance between the plurality of vent holes, can be changed to make a rule. Can be arranged as desired.

Furthermore, since a plurality of ventilation holes penetrate through the mold through the intersections of the lattice-like communication holes and are opened on this surface at predetermined intervals, the interior of the automobile is covered. It is possible to suck the sheet material for forming the member with the same suction force over the whole.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for manufacturing a porous mold which is an embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 (a) and 1 (b) are views showing the structure of a porous mold 1 manufactured by the method for manufacturing a porous mold in this embodiment, which will be described below. FIG.
In (a) and FIG. 1 (b), reference numeral 1 denotes a porous molding die, which is formed by depositing a metal such as nickel or copper by electroforming, for example, a first electroformed layer 2, a second electroformed layer. A plate-shaped body in which a cast layer 3 and a third electroformed layer 4 (the number of these layers is arbitrary) are laminated, and a convex plate portion 5 protruding from the central portion (projecting in the Z-axis direction) is formed. It is formed into an uneven cross section. In addition, the porous mold 1 has a grid-shaped communication hole 6 that spreads in two directions (X and Y axis directions) orthogonal to the direction in which the convex plate portion 5 projects (Z axis direction) in the first electroformed layer 2. And this first
A plurality of ventilation holes 7 having a minute diameter are formed penetrating the electroformed layer 2 to the second electroformed layer 3 and the third electroformed layer 4. The grid-shaped communication holes 6 extend in the X-axis direction and are arranged in parallel in the Y-axis direction, and the vertical communication hole portions 10 extend in the Y-axis direction and are arranged in parallel in the X-axis direction. Communication holes 11 are provided between the vertical communication holes 10 and the horizontal communication hole 1
The respective intervals A and B between the two are the electroformed layers 2 to 4 in the method for manufacturing the porous mold 1 described later.
In order to effectively deposit nickel, copper and the like in the electroforming process, the thickness is set within the range of 1.3 mm to 3.0 mm.

The plurality of ventilation holes 7 are continuous beads formed by pressing spheres continuously, extend in the direction in which the convex plate portion 5 projects (Z-axis direction), and the vertical communication holes 10 of the grid-shaped communication holes 6. Through any of the intersections 12 between the horizontal communication hole 11 and
It penetrates through the porous mold 1. Also, a large number of vent holes 7
Is in the range of 0.8 mm to 3.0 mm in order to effectively deposit nickel, copper and the like in the electroforming treatment of the electroforming layers 2 to 4 in the method for producing a porous mold described later. The inner space (the distance between the outer peripheries of the respective ventilation holes 7) is maintained to open on the front surface 1A and the back surface 1B of the porous mold 1, and suction is possible without impairing the transferability of the front surface 1A, and its diameter Is in the range of 1.0 mm to 2.0 mm.

Next, a method for manufacturing the above-mentioned porous mold 1 will be described with reference to FIGS.

(1) First, as shown in FIGS. 2 (a) to 2 (e), the non-conducting spherical body 20 constituting each vent hole 7 and each communicating hole 10, 11 of the porous mold 1. The assembly 30 in which the and the grid-shaped fiber member 25 are bonded together is formed by the following procedure. (First step)

As shown in FIGS. 2 (a) and 2 (b), a flat plate member 15 made of metal, resin, glass fight or the like is prepared, and a plurality of disposition slots 16 are formed in the flat plate member 15. Each of the plurality of arrangement slot holes 16 has a plurality of axes Y1, Y2, Y arranged in parallel with a distance A in one direction (Y-axis direction).
Are formed at each of intersection points 17 at which the plurality of parallel axis lines X1, X2, X3, ... With a space B in the other direction (X-axis direction) intersect. The diameter D of each placement slot 16 is somewhat smaller than the diameter D1 of the non-conductive spherical body 20, and the depth H is shallower than the diameter D1 of the non-conductive spherical body 20. . The non-conductive spherical body 20 is made of styrene resin or acrylic resin that can be dissolved in a solvent and has a diameter D1 of 1.0 m.
Those having a size of m to 2.0 mm are used.

Then, as shown in FIG. 2 (c), the non-conductive spherical body 20 is fitted into each of the arrangement slot holes 16 of the flat plate member 15, and as shown in FIG. An electrically conductive and flammable lattice-like fiber member 25 such as a glass fiber coated with an adhesive is attached onto the spherical body 20.
This lattice-like fiber member 25 is shown in FIGS. 2 (d) and 2 (e).
2, a plurality of longitudinal fiber portions 26 (first linear portions) arranged in parallel in one direction (X-axis direction) and the longitudinal fiber portions 2
6 and a plurality of transverse fiber portions 27 (second linear portions) arranged in parallel in a direction orthogonal to 6 (Y-axis direction), and the thickness of each fiber portion 26, 27 is 0.3 mm to 2 Within the range of 0.0 mm, the distance A between the longitudinal fiber portions 26, 26,
And the distance between the horizontal fiber portions 27, 27 is B is 1.3 m.
It is set within the range of m to 3.0 mm, each vertical fiber portion 26 is on the axis Y1, Y2, Y3, ... Of the flat plate member 15, and each horizontal fiber portion 27 is the axis X1 of the flat plate 15, X2,
X3, ... Located on top of the lattice-shaped fiber member 2
5, the intersection 28 of the longitudinal fiber portion 26 and the transverse fiber portion 27,
An assembly 3 in which the non-conductive spherical body 20 and the grid-like fiber member 25 are adhered to each other by sticking the non-conductive spherical body 20 onto the non-conductive spherical body 20 fitted in the respective arrangement slots 16 of the flat plate member 15.
Form 0. After the bonding, the assembly 30 is removed from the flat plate member 15.

(2) Further, as shown in FIG. 3 (a), a convex model 35 (reverse shape of the porous molding die 1), which is the same as the molded product, is made of epoxy resin, polyester resin or the like. The conductive paint 36 is applied to the entire surface 35A (convex side) of the model 35 and dried. This conductive paint 3
For 6, an epoxy-based paint containing copper or silver, a thin film silver layer by a silver mirror reaction, or the like is used. Then, after the electrically conductive paint 36 is dried, as shown in FIGS. 3B and 3C, the assembly 30 in which the adhesive is applied over the entire surface of the dried electrically conductive paint 36. This non-conductive spherical body 20
Paste from the side. (Second step)

(3) Next, as shown in FIG. 4, the model 35 in which the electrically conductive paint 36 and the assembly 30 composed of the non-conductive spherical body 20 and the grid-like fiber member 25 are arranged is electroformed. Tank 4
Soak in the electrolyte solution 41 of 0, nickel of the electrolyte solution 41,
A metal electrode 42 made of copper or the like is connected to the positive electrode, and the conductive paint 36 is connected to the negative electrode to conduct electricity to perform electroforming treatment. As a result, a metal such as nickel or copper is deposited on the conductive coating 36 to form the first electroformed layer 2, but the metal is deposited on the grid fiber member 25 and the plurality of non-conductive spherical bodies 20. Instead, since the bases of the grid-shaped communication holes 6 and the ventilation holes 7 are formed,
The first electroformed layer 2 has a thickness such that the grid-like fiber member 25 is exposed. (3rd step)

(4) By the way, when the exposure of the grid-like fiber member 25 is larger than the desired thickness of the first electroformed layer 2, as shown in FIG. Then, the non-conductive spherical body 20 is further adhered to each intersection 28 of the grid-like fiber member 25 with an adhesive or the like, and the electrolytic solution 4
It is put in No. 1 and subjected to electroforming treatment again. By repeating this, the first electroformed layer 2 to the third electroformed layer 4 having a desired thickness are obtained. (4th process)

(5) Further, on the first electroformed layer 2, as shown in FIG.
As shown in (b), when the second electroformed layer 3 is further formed to form the grid-shaped communication holes 6 and the plurality of ventilation holes 7,
On the model 35 on which the molding of the first electroformed layer 2 has been completed, the assembly 30 including the grid-like fiber member 25 and the non-conductive spherical body 20 created by the procedure described in (2) above is placed on the model 35. After adhering from the side of the spherical body 20 so as to coincide with each intersection 28 of the grid-like fiber member 25 existing in the first electroformed layer 2,
The second electroformed layer 3 is formed by performing electroforming treatment in the same procedure as described in (4) above. By repeating this, molding of the third electroformed layer 4, ..., Nth electroformed layer is obtained. (4th process)

(6) As described above, the first electroformed layer 2 or the second electroformed layer 3, the third electroformed layer 4, ... On the model 35.
.. When the mold, which is a laminated body including the Nth electroformed layer, is molded, the model 35 is taken out of the electrolytic solution 41, the model is separated from the model 35, and the lattice-shaped fiber member remaining in the mold is formed. When 25 and the plurality of non-conductive spherical bodies 20 are burned in an oven or the like (not shown) or extracted and removed with a solvent or the like, as shown in FIGS. 1 (a) and 1 (b), they are separated from each other at predetermined intervals. Porous molding die 1 in which a plurality of maintained ventilation holes 7 and lattice-shaped communication holes 6 are formed, or FIGS. 6A and 6A.
As shown in (b), the first electroformed layer 2 is formed in the second electroformed layer 3 and the third electroformed layer 4 together with the grid-shaped communication holes 6 and the plurality of ventilation holes 7 in the first electroformed layer 2. A porous molding die 45 is manufactured in which the grid-shaped communication holes 6 arranged in series with respect to the grid-shaped communication holes 6 of the layer 2 are arranged in a direction in which the convex portions 5 project. As shown in FIGS. 6 (a) and 6 (b), this porous molding die 45 has a grid-shaped communicating hole 6 formed in each of the electroformed layers 2 to 4, and this grid-shaped The communication hole 6 is provided with a plurality of vertical communication hole portions 10 and a plurality of horizontal communication hole portions 11 in two directions (X and Y axis directions) orthogonal to the direction in which the convex portion 5 projects (Z axis direction). A plurality of ventilation holes 7 pass through each of the intersections 28 of the vertical communication holes 10 and the horizontal communication holes 11.

In this embodiment, the assembly 30 is adhered from the non-conductive spherical body 20 side onto the conductive paint 36 of the model 35, but the present invention is not limited to this, and the grid is not limited thereto. Conductive paint 3 on the model 35 from the side of the fiber member 25
6 may be adhered onto the surface.

Further, in this embodiment, the assembly 30 is adhered over the entire surface of the electrically conductive coating material of the model 35, and the model 35 is electroformed in the electroforming tank 40 so that the first electroformed layer 2 is formed. After molding, a plurality of non-conductive spherical bodies 20 are further stacked and mounted on the assembly 30, and the second electroformed layer 3 and the third electroformed layer 4 are formed, Forming mold (shown in FIG. 1), or a plurality of assemblies 30 stacked on top of the assembly 30 and attached to the second electroformed layer 3 and the third electroformed layer 4.
Although the method for manufacturing the porous mold and the porous mold (shown in FIG. 6) for molding are described, the invention is not limited to this, and the assembly 30 in which the first electroformed layer 2 is molded.
On top of which the non-conductive spherical body 20 is attached, the assembly 30 is further attached to form the second electroformed layer 3 and the third electroformed layer 4, and the first electroformed layer 2 is formed. Mounted on the assembly 30, the non-conductive spherical body 2
0 may be attached to form the second electroformed layer 3 and the third electroformed layer 4. That is, the non-conductive spherical body 20 and the assembly 3 are optionally provided on the assembly 30 on which the first electroformed layer 2 is formed.
0 may be combined and stacked to form the ventilation holes 7 and the grid-shaped communication holes 6 having various shapes in the first to third electroformed layers 2 to 4.

[0034]

As described above, according to the method for manufacturing a porous mold and the porous mold of the present invention, the non-conductive spherical bodies are bonded to the intersections of the lattice member to form the assembly independently. do it,
Since this assembly and the non-conductive spherical body or the assembly are attached on the conductive paint of the model, if necessary, the electroforming process is performed, so that the assembly is simply attached to the model. That is, since it is possible to arrange a plurality of air holes regularly by an extremely simple operation, the intervals between the particles of the non-conducting spherical body are narrowed, and some parts come close to each other. It is possible to prevent the metal from being deposited by the casting process, or to prevent the metal from completely blocking the upper part of the non-conductive spherical body, and it is possible to make the diameter of the air holes uniform and allow the uniform passage of the fluid. As a result, at the time of molding, the sheet material is sucked with a substantially uniform suction force over the entire surface by all the vent holes, and the sheet material is evenly adhered to the molding die, so that the molding die of the molded product is formed. It is possible to secure a uniform reversibility with respect to.

Further, after fitting the non-conductive spheres into the respective placement slots of the member having the plurality of placement slots, the grid-like member is applied to the respective non-conductive spheres within the placement slots. Since the intersections are arranged so as to correspond to each other and adhere to the non-conducting spherical body, the non-conducting spheres to the intersections of the grid-like member can be formed in a short time and with extremely simple work. Adhesion of body
Since they can be arranged, it is possible to more accurately form the plurality of vent holes so as to keep a predetermined distance from each other.

Furthermore, by varying the mutual distance between the linear portions of the lattice-like member, the mutual distance between the plurality of non-conducting spherical bodies, and hence the distance between the plurality of air vents, can be changed so as to be regulated. It is possible to fabricate the sheet material by changing the number of the plurality of ventilation holes arranged in the porous molding die or the intervals between them according to various conditions at the time of molding the sheet material. Becomes

Furthermore, since a plurality of ventilation holes penetrate through the mold through the intersections of the lattice-like communication holes and are opened on this surface at predetermined intervals, the interior of the automobile is covered. The sheet material for forming the member can be sucked with the same suction force over the whole, and the sheet material can be evenly adhered to the molding die, so that the molded product can be uniformly inverted with respect to the molding die. It becomes possible to secure.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a porous molding die manufactured by a method for manufacturing a porous molding die according to an embodiment of the present invention, in which (a) is a cross-sectional view and (b) is (a). It is an AA sectional view.

FIG. 2 is a view for explaining the first step of forming an assembly in the method for manufacturing a porous mold according to an embodiment of the present invention, in which (a) is a flat plate having arrangement slots. Top view of the member, (b) is (a) of the flat plate member in which the arrangement slot is formed
3B is a cross-sectional view taken along the line BB of FIG. 5, (c) is a cross-sectional view showing a state in which the non-conductive spherical body is fitted in the arrangement slot hole of the flat plate member, and (d) is the non-fitting state of being inserted in the arrangement slot hole of the plate member. Sectional drawing which shows the state which the grid-like fiber member was adhere | attached on the conductive spherical body, (e) is the grid-like fiber member adhered on the non-conductive spherical body fitted in the arrangement slot of a flat plate member. It is a top view which shows a state.

FIG. 3 is a view for explaining the second step of attaching the assembly to the model in the method for manufacturing a porous mold according to one embodiment of the present invention, wherein (a) is a conductive paint on the model. Is a cross-sectional view showing a state where the coating is applied, (b) is a cross-sectional view showing a state where the assembly is attached on the conductive coating, and (c) is a top view showing a state where the assembly is attached on the conductive coating. Is.

FIG. 4 is a cross-sectional view showing a state for explaining a third step of electroforming a model of a method for manufacturing a porous mold according to an embodiment of the present invention.

FIG. 5 is a view for explaining a method for manufacturing a porous mold according to an embodiment of the present invention, in which (a) is an enlarged cross-sectional view showing a procedure for forming a plurality of electroformed layers; (B) is an enlarged cross-sectional view showing a procedure for forming the grid-shaped communication holes inside a plurality of electroformed layers.

6A and 6B are views showing a modified example of the porous mold in one embodiment of the present invention, in which FIG. 6A is a sectional view and FIG. 6B is a sectional view taken along line CC of FIG.

FIG. 7 is a cross-sectional view showing a structure of a porous molding die according to a conventional technique and a usage mode thereof.

[Explanation of symbols]

 1, 45 Porous molding die 2-4 First to third electroformed layer 6 Lattice communication hole 7 Vent hole 10, 11 Lattice communication hole portion 15 Flat plate member (member) 16 Arrangement groove hole 20 Non-conductive spherical body 25 Lattice fiber member (lattice member) 26 Vertical fiber part (vertical linear part) 27 Horizontal fiber part (horizontal linear part) 12, 17, 28 Intersection part 30 Assembly 35 Model 36 Conductive paint

Claims (6)

[Claims] 1. A first step of adhering a non-conductive spherical body to each intersection of a grid-like member to form an assembly, and applying a conductive paint on the surface of a model, and applying the conductive paint on the conductive paint. A second step of attaching the assembly, and a third step of forming an electroformed layer on the assembly, further comprising a non-conductive spherical body or the assembly on the assembly, if necessary. A fourth step in which the step of attaching a solid body and the third step are repeated is performed to form a mold made of 1 or N electroformed layers on the model, and the mold is separated from the model. Removing the remaining grid-like member and the non-conductive spherical body, and penetrating the mold through the grid-like communication holes and the intersections of the grid-like communication holes inside the mold, and A method for manufacturing a porous mold, in which a plurality of vent holes are formed on the surface of the mold, the holes being opened at a predetermined interval. 2. The fourth step includes the step of attaching a non-conductive spherical body on each intersection of the assembly and the third step, and further, if necessary, the non-conductive spherical body. The method for producing a porous mold according to claim 1, wherein the step of mounting the non-conductive spherical body on the body and the third step are repeated. 3. The fourth step includes the step of mounting the assembly on each intersection of the assembly so that the intersections are aligned with each other, and the third step, and further, if necessary, The step of mounting the assembly on each intersection of the assembly so that the intersections are aligned with each other;
The method for producing a porous mold according to claim 1, wherein the steps are repeated. 4. The first step of adhering a non-conductive spherical body to each intersection of the lattice-like member to form an assembly has a plurality of arrangement slots corresponding to each intersection of the lattice-like member. After fitting the non-conducting spherical body into each arrangement slot of the member, the grid-like member is arranged so that each intersection point corresponds to each non-conducting spherical body in each arrangement slot. The method for producing a porous mold according to each of claims 1 to 3, wherein the method is carried out by adhering to the non-conductive spherical body. 5. The lattice-shaped member is composed of a plurality of vertical linear portions arranged in parallel in one direction and a plurality of horizontal linear portions arranged in parallel in a direction orthogonal to the vertical linear portion. The mutual intervals of the plurality of ventilation holes are changed by changing the intervals between the vertical linear parts and the intervals between the horizontal linear parts. A method for producing the described porous mold. 6. A porous molding die having a plurality of through holes penetrating the die, wherein each of the plurality of ventilation holes is 1 or N formed in the die.
The porous molding die is characterized in that it penetrates through the respective intersections of the lattice-like communication holes of the above, and is opened at a predetermined distance from each other on the surface of the die.