JPS61127886A - Electroforming mold and its manufacture - Google Patents

Abstract

PURPOSE:To easily and inexpensively obtain an electroforming mold which is excellent in accuracy and strength, by arranging cooling pipes in two rows at the backside surface of an electroforming shell with a reinforcing layer in-between and filling the electroforming shell with fluidized fillers after setting a molding flask to the electroforming shell, and then, releasing the flask after solidification. CONSTITUTION:A product shape of model 1 is dipped in an electrolyte after a conduc tive film 3 for exfoliation is formed on the surface 2 and electroforming shell 7 of Ni, etc., is deposited. Then cooling pipes 9 are arranged on the backside surface of the electroforming shell 7 and, after a reinforcing sprayed layer 10 of Ni, etc., is formed, the pipes 9 are buried. The 2nd cooling pipes 109 are put on the concave section of the sprayed layer 10. A molding flask 11 is set on the model 1 and a nozzle member 8 is held by the flask 11. The space thus formed is filled with low-contraction fluidized filler 13 and the agent 13 is solidified so as to unite the flask 11 and electroforming shell 7 including the sprayed layer 10 to one body. Then the electroforming shell 7 is released from the model 1 and the front end of the nozzle member 8 projecting from a model forming surface 14a is removed, and thus, a mold 14 equipped with the injection nozzle 8 is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a resin R5 used for injection molding of plastics and a method for manufacturing the same.

(Prior art) Molds are used as molds for plastic injection molding, etc., and the molding part (molding part) of the mold is often formed by cutting out cast steel, cast iron, etc., or by copying machining, etc. .

(Problems to be Solved by the Invention) The above-mentioned conventional techniques require a large number of man-hours to manufacture the mold, require a lot of machining, and therefore are troublesome and complicated to manufacture, and require many steps to manufacture. The mold material is also disadvantageous because it is made by cutting out the metal, and the material cost is high and the weight of the mold becomes large. Naturally, the mold cost is also extremely high due to the above.

The present invention has been made to solve the above technical problems.

(Objective of the invention) The object of the present invention is to simplify mold manufacturing, significantly reduce the number of days required for assembly, reduce the number of man-hours, reduce the weight of the mold, reduce mold material costs, and reduce mold manufacturing costs. This makes it possible to reduce the cost of the resulting product by making it suitable for small-scale production of many types of products, and also to obtain molds that are superior in terms of accuracy and strength, as well as having excellent cooling performance and It is an object of the present invention to provide an electroforming mold that facilitates temperature control and is functionally useful, and a method for manufacturing the same.

(Means for Solving the Problems) In order to solve the above technical problems, the present invention provides a first cooling pipe disposed on the back side of the electroformed shell, and a first cooling pipe disposed on the back side of the electroformed shell so as to embed the cooling pipe. a reinforcing layer formed on the reinforcing layer, a second cooling pipe disposed on the back side of the reinforcing layer, and a second cooling pipe disposed on the back side of the electroformed shell to form a sealed space, and the electroformed shell is disposed in the space. The first invention provides an electroforming mold comprising a reinforcing layer and a mold filled with and solidified with a low-shrinkage fluid filler for embedding and fixing the second cooling pipe.

The second invention includes a step of coating a product shape surface of a model mold with a conductive release film, a step of depositing and forming an electroformed shell on the conductive release film, and a first cooling pipe on the back surface of the electroformed shell. forming a reinforcing layer on the back surface of the electroformed shell so as to embed the cooling pipe therein; a step of disposing a second cooling pipe on the back surface of the reinforcing layer; A process of setting a formwork on the shell, and filling a space between the reinforcing layer and the formwork with an electric na, a fluid filler with low shrinkage through the inlet formed in the formwork, and a second process. Step 2 of embedding the cooling pipe in the filler, and releasing the model mold from the solidified product in which the mold, the electroformed shell, the reinforcing layer, and the second cooling pipe are embedded and fixed in the filler. This is a method for manufacturing an electroforming mold, which includes the steps of:

The third invention includes a first reinforcing layer provided so as to cover the main part of the back surface of the electroformed shell, and a first reinforcing layer provided on the back surface of the first reinforcing layer.
a second reinforcing layer formed on the back surface of the electroformed shell so as to embed the cooling vibe and the cooling pipe; a second cooling pipe disposed on the back surface of the second reinforcing layer; and the electroformed shell. The cooling pipe is arranged to form a sealed space on the back side of the cooling pipe, and the space is lined with an electroformed shell and a reinforcing layer, and a low-shrinkage fluid filler is filled and solidified to embed and fix the second cooling pipe. It is an electroformed shell consisting of a molded frame.

Figure 4 The invention comprises a step of coating a product shape surface of a model mold with a conductive release film, a step of depositing an electroformed shell on the conductive release film, and a step of depositing a first layer on the main part of the back surface of the electroformed shell. forming a reinforcing layer; disposing a first cooling pipe on the back surface of the first reinforcing layer;
a step of forming a second reinforcing layer on the back side of the reinforcing layer, a step of arranging a second cooling pipe on the back side of the second reinforcing layer, and a step of setting a formwork on the electroformed shell, A low-shrinkage fluid filler is filled into the space between the electroformed shell, the reinforcing layer, and the mold through the inlet formed in the mold, and a second cooling pipe is inserted into the filler. A method for manufacturing an electroforming mold, which comprises the steps of: embedding the mold, the electroformed shell, the reinforcing layer, and the second cooling pipe in the filler and releasing the model mold from the solidified product. It is.

(Effects achieved by the above means) According to the first invention, the cooling pipe is installed on the back side of the electroformed shell, and the cooling pipe is installed on the back side of the reinforcing layer so as to be held with a filler, so that cooling performance can be improved. Efficient cooling allows for early solidification of molded products, speeding up molding and preventing thermal distortion, resulting in molded products with good precision. Double cooling pipes are provided, and the cooling pipes are also embedded in the filler, making it easy to control the cold parts of the entire mold and the mold temperature. In addition, the electroformed shell is reinforced by the reinforcing layer provided on the back side of the electroformed shell, and the cooling pipe is held in place by the reinforcing layer, so good conductivity between the cooling pipe, the reinforcing layer, the electroformed shell, and the metal is maintained. A highly effective product is obtained, and since the second cooling pipe is held by the filler, it can be held securely without requiring a holding mechanism.

In order to obtain such an electroforming mold, it can be easily and inexpensively produced by the process as in the second invention, and a mold with excellent performance can be obtained at low cost as a molding die for small quantity and multi-machine insertion.

According to the third invention, there is a first reinforcing layer on the other electroformed R''8 surface of the second cooling pipe, and the first cooling pipe is buried on the back side of this via the second reinforcing layer, so that the strength is further improved. In addition, the electroforming mold can be used for high-pressure molding while improving cooling performance, improving lifespan and durability.The fourth invention allows such an electroforming mold to be obtained easily and at low cost.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 17 are explanatory diagrams of the method according to the present invention, which will be explained in the order of steps below.

Figures 1 to 9 show a method for manufacturing a female mold. In Figure 1, (1) is a female mold model made of plaster, epoxy resin, etc., and has the shape of the product to be molded as model (1). A conductive peeling film (3) is formed on the surface (2), and the surface is coated with the coating III (3).

The model (1) is immersed in the electrolytic solution (5) in the electrolytic tank (4) as shown in FIG. 2, and the coating (3) of the model (1) is
is used as the cathode, and the metal (6) for depositing the electroformed shell facing into the electrolytic solution (5), nickel in the embodiment, is used and maintained as the anode. As a result, the coating (3) on the surface of the model (1)
), and the electroformed shell (7 )
is precipitated and formed.

After molding the electroformed shell (7), the model (1) was taken out, and the resulting model is shown in FIG.

A support vibrator (a) of an injection nozzle member (8), which will be described later, is placed in the center of a concave part (a protrusion in the figure since it is inverted) that forms the molding part of the electroformed shell (7). The model (1) is fitted into the hole (7a) formed in the electroformed shell (7).
It is set up as if it were thrown inside.

Also, there is a cooling pipe (8) on the back side (7b) of the electroformed shell (7).
A part of the outer peripheral surface of this is the back surface (7b) of the electroformed shell (7).
), and the cooling pipe (9)...
are arranged parallel to each other at a distance from the phase V, and the electroformed shell (7
) The inside of the folded flange part (7C) at the end of the pipe is left open without any pipe provided therein, as shown in FIG.

A reinforcing sprayed layer (10) is formed on the back surface (7b) of the electroformed shell (7), which is arranged so as to be in contact with the above-mentioned pipes (8). Since the shell (7) is made of nickel, it is formed by plasma spraying, low-temperature spraying, etc. of the same type of nickel that has good adhesion. The sprayed layer (10) also covers the pipe (9)...
- is embedded in the thermal spray layer (10). In this way, a reinforcing layer of the electroformed shell is formed and the pipe (8) is fixedly held. In this case, the sprayed layer (10) is not formed inside the flange portion (7c). This is shown in FIG.

The above thermal sprayed layer (10) is arranged in a spaced apart pipe (9).
)..., and to imitate the outer shape of the pipe (9)..., valley-shaped recesses (10a)... are formed between the pipes (9)... on the surface of the thermal sprayed layer (10). . Such a sprayed layer (l
O) recess (10a)...a second cooling pipe (t
o9)... is mounted and arranged, and the second cooling pipe is a thermal sprayed layer (
It faces the outside of the outer surface of the first cooling pipe (9) with the cooling pipe (9) in between, and the first cooling pipe (9)...
108)..., (9)... are arranged side by side in plan view without overlapping and with little gap. This is shown in Figure 6.

The above model (1) is arranged so that the back side of the electroformed shell (7) including the thermal spray layer (10) and the second cooling pipe faces upward, and the formwork (11) is set and fixed from above. (11) is provided with a peripheral wall (lla) and a top wall (itb) and is opened downward, and the lower end of the peripheral wall (lla) is set and fixed on the inside of the flange part (7c) of the peripheral edge of the electric 14 shell (7), Thermal spray layer (10
) including electroforming * Space (S) between (7) and formwork (11)
There is a rib (li
e)...

On the other hand, a filler inlet (lld) is provided in the top wall (llb). A hole (lie) is provided in the center of the top wall (flb) through which the pipe (a) for the nozzle member (8) passes, and a nozzle is provided with a flange portion (8c) at the top and passes through the passage (8a) vertically. Pass member (8) through pipe (a) and make 5 holes (lle)
A recess (llF) is provided in the upper part of the locking flange (8).
C) are fitted and engaged, and the nozzle member (8) is held by setting and fixing the cap (12) from above.

This is shown in Figure 7.

The inlet (lid) of the formwork (8) with the above set fixed
to low-shrinkage fluid fillers, such as cement and iron powder (
Filler made by mixing iron powder (15% to 30%) (13)
Alternatively, an iron filler (approximately 10%) is added to these to increase the strength, and the filler is flowed into the space (S) and filled, as shown in FIG. 8, and the filler (13) is solidified. This results in an electroformed R (7) including the formwork (11) and the sprayed layer (10).
are integrated with the filler (13).

At the same time, the second cooling pipe (109) facing the thermal spray layer (10) is wrapped in filler (13) and buried inside it, and as the filler (13) solidifies, It will be held fixed.

Next, the electroformed shell (7) is peeled off from the model (1), and the peeling is facilitated by the coating (3). The female mold (14) obtained by peeling is shown in FIG.
The tip of the pipe (a) and the tip of the nozzle member (8) protruding from 14a) are cut and removed. The formwork (II) is a flange part (7C) folded back between these edges with screws (
! 5) The filler (13) is firmly connected to the formwork (8) via the ribs (llc), etc., and the first cooling pipe (8) is connected to the molding surface. , a mold (14) is installed inside to prepare for the molding surface, and a second cooling pipe (109) is further installed in the back to reinforce the molding surface, and equipped with an injection nozzle.
) is obtained.

Figures 10 to 17 show the method for manufacturing the male mold;
As shown in the figure, a conductive peeling film (23) is formed on the surface (22) of the male model (21), and then electrolysis is carried out in an electrolytic cell (24) facing the metal for deposition (26) as shown in Figure 11. liquid (25
) and dipped the model (21) into the coating (23).
An electroformed shell (27) of a predetermined thickness is formed on the surface.

Take out the obtained model (21) and connect it (27)
The model (21) is inserted through the hole ((27a) provided in a part of the
Through the pipe (28) reaching inside, the pipe (28) is #
(27) It consists of a double structure in which a large diameter pipe (28a) is fitted into the upwardly protruding part.

A cooling pipe (29) is installed on the back side (27b) of the electroformed shell (27).
)... so that a part of its outer periphery is in contact with the back surface (27b) of the electroformed shell (27) 4! Place the cooling pipe (
29)... are arranged in plurality and spaced apart from each other, and the inside of the folded flange part (27c) at the end of the electroformed shell (27) is left open without a pipe arranged therein. This is shown in FIG.

The electroformed shell (
A reinforcing sprayed layer (30) is formed on the back surface (27b) of 27), and the sprayed layer (30) is formed by low-temperature spraying, plasma spraying, etc. of nickel in the same manner as described above.

The pipes (29) are also covered with the sprayed layer (30), and the pipes (28) are embedded in the sprayed layer (3o). In this way, a reinforcing layer of the electroformed shell is formed and the pipe (29) is fixedly held. In this case, the sprayed layer (30) is not formed inside the flange portion (27c). This is shown in FIG.

The above thermal sprayed layer (30) is formed by pipes (2
9) In order to cover the pipe (29) and follow the outer shape of the pipe (29), a valley-shaped recess (30a) is formed between the pipe (29) and the sprayed layer (30). be done. A second cooling pipe (129) is placed and arranged on the recess (30a) of the sprayed layer (30), and the second cooling pipe (129)
) face the outer surface of the sprayed layer (30) with the thermal spray layer (30) in between, and the first cooling pipe (29) faces between the first cooling pipe (29) and the cooling pipe (29).

(129)... are arranged side by side in a plan view without overlapping and with a small gap. This is shown in Figure 6.

A formwork (3) is placed on the inner surface of the electroformed shell (27) including the sprayed layer (30) and the second cooling pipe (129) of this model (21).
1) is set and fixed, the formwork (31) has an H-shaped longitudinal section, has a partition wall (31b) in the middle of the peripheral wall (31a), and inserts a pipe ( 28a) Fitting the upper end, the inlet (31d) and the rib (31e),
(310, shown in FIG. 15, after which the inlet (
Filler (33) is filled into the space (Sl) from 31d) and solidified, and then the model (21) is peeled off to obtain a mold (34) as shown in Fig. 17, which is placed inside the model (21). The end (23b) of the pipe (2nd) protrudes from the mold surface (34a) and is therefore cut and removed. And the flange part (27
Tighten the screw (35) in c).

The molds (14) and (34) according to the second invention obtained above are combined vertically to form a mold (40), and a female mold (14) is formed.
is the upper mold, the male mold (34) is the lower mold, and the pipe (
Pass the eject pin (36) inside 28).

Such molding 5 (14), (34), 17) mold surface (
14a), the cavity (41) formed between (34a)
) is injected through a nozzle member (8) to obtain a resin molded product shaped like the cavity (41), but the cooling pipe (9)...
, (108)..., (29)..., (129)
... are led out of the formwork (tt), (31) and communicated with each other via joint pipes, etc., and those at both ends are connected to the cooling medium inlet and outlet members, and the pipe (8)...・,(1
09)..., (29)..., (129)... to cool the mold. In this case, the cooling is carried out by the electroformed shell (7) that forms the mold surface, (27) and the sprayed layer (10) that acts as a reinforcing agent for the electroformed shell (7).

(30) is the same material and is metal, pipe (9)...
(28) is 71! Since it is in contact with the cast shells (7) and (27), it has good thermal conductivity and efficient cooling is performed. In addition, since the pipes (109)..., (129) are embedded in the filler on the outer surface of the sprayed layers (10), (30), the mold is doubly cooled.
9)..., (129)... is a pipe (3)...,
(29) Because it is disposed between..., cooling can be performed evenly, and mold temperature can be easily restricted. The electroformed shell (7) constitutes the mold surface with the sprayed layer (10) and (30).
, (27) are reinforced, it has excellent durability, and since it has excellent cooling properties, it can be used repeatedly with little distortion and excellent accuracy.

19 to 26 show the method according to the third invention, and the method according to the 27th invention.
The figure shows a mold according to the fourth invention obtained by such a method.

19 to 26 show a female mold, in which an electroformed shell (57) is deposited and formed on the surface (52) of a model (51) via a conductive peeling film (53). A first reinforcing sprayed layer (67) is formed on the back surface of the electroformed shell (57) to a predetermined and uniform thickness by, for example, low-temperature spraying or plasma spraying of nickel, and then electroformed. A 7 rung part (57c) is formed at the end of the R (57), and the end of the sprayed layer (87) extends to the front of the flange part (57c).
) and the end of the sprayed layer (67). This is shown in FIG.

The above thermal sprayed layers (67), 71! The pipe (a) of the injection nozzle member (58) is erected in the same manner as described above so that its tip passes through the grain (57), and the first cooling pipe is placed on the 8th surface of the thermal spray layer (67). (58) Like touching...!
! Place the cooling pipe (59) on the back of the thermal spray layer (67).
), a second thermal sprayed layer (60) made of nickel is formed by plasma spraying in the same manner as described above, and the cooling pipe (5θ) is covered with the first thermal sprayed layer (80). (B7) Embed and fix on top.

The second cooling pipe (159) is placed and set in the recess (80a) between the first cooling pipe (59) formed on the outer surface of the above thermal sprayed layer (6G). The 20th
Illustrated in the figure.

Next, the formwork (61) is set in the same manner as described above, the nozzle member (58) is passed through the pipe (a), and the filler (B3) is filled and solidified, as shown in FIG. Model (51
), peel off the coating (53) as well, and screw the flange part (57c) (85). (64) is obtained.

The mold (64) obtained above; the electroformed shell (57) forming the molded part
is double reinforced with thermal sprayed layers (87) and (60), and the first cooling pipe (58)... is reinforced with layers (θ7) and (80).
The second cooling pipes (159) are firmly fixed and held between them, and the second cooling pipes (159) are embedded and held in the filler (63).

Figures 23 to 26 show the male type, model (71)
The electroformed shell (
77) is deposited, and the pipe (78) is erected so as to penetrate into the model (71) in the same manner as described above, and the electroformed shell (77) is formed by precipitation.
A reinforcing first thermal sprayed layer (87) was formed to a predetermined thickness on the back side of the plate in the same manner as described above, and this is shown in FIG.

Next, a first cooling pipe (
79)... is arranged and mounted, a second reinforcing sprayed layer (80) is formed on the back side of the sprayed layer (87) in the same manner as described above, and the cooling pipe (58)... is embedded and fixed. do.

The second cooling pipe (179) is placed and set in the recess (80a) between the first cooling pipe (73) formed on the outer surface of the thermal sprayed layer (80). The 24th
Shown in the figure.

Next, the formwork (81) is set, and the filler (83) is injected and solidified, which is shown in Fig. 25, and after solidification the model (71)
and the conductive film (73) at the same time.

Cut the tip of the pipe (78) and screw the flange part (77c) of the electroformed shell (77)] L (85) L, No. 26
A mold (84) as shown in the figure is obtained.

Figure 27 shows the mold (90) obtained above.
), the electroformed shells (57) and (77) that form the molding parts of the respective molds (84) and (84) are reinforced in two layers, making them suitable for high-pressure molding and that can be cooled while being highly reinforced. The pipe can be held fixed.

In the embodiments of each of the inventions described above, the reinforcing layer is formed by low-temperature spraying or plasma spraying, but the forming method is not limited thereto and may be arbitrary.

(Effects of the Invention) As is clear from the above, according to the present invention, since a cooling pipe is installed on the back side of the electroformed shell, cooling during molding can be performed efficiently, and molding can be speeded up by early solidification of the molded product. It is possible to prevent IF from thermal distortion, and a molded product with good precision can be obtained, and since the cooling pipe is double, cooling performance is extremely excellent, and mold temperature control is also easy.

In addition, the electroformed shell is reinforced by the reinforcing layer provided on the back side of the electric M shell, and the first cooling pipe is securely and firmly held by the reinforcing layer, and the heat conduction by the cooling pipe, the reinforcing layer, and the electroformed shell metal is improved. properties are maintained well and a high cooling effect is obtained.
Furthermore, since the second cooling pipe is embedded and held with a filler, it is securely fixed.

Next, in order to obtain the above-mentioned mold, unlike cutting out the mold, it is easy to obtain, and the cooling passage can be formed by embedding the pipe at the same time when molding the reinforcing layer, and by soaking and solidifying the filler in the first and second stages. This can be obtained by fixing the cooling pipe of No. 2, and a practically clean mold can be obtained easily and inexpensively.

In addition, in the third invention, since the reinforcing layer is double-formed while embedding the cooling pipe, it can be used as a simple type even for products with high molding pressure, and the mold can withstand high pressure and has excellent cooling performance. can be obtained easily and inexpensively.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIGS.
Figure 7 is an explanatory diagram showing the second invention in the order of manufacturing steps, Figure 18 is an explanatory diagram of the electric S type according to the first invention obtained by the same manufacturing method, and Figures 19 to 26 are illustrations of the fourth invention. FIG. 27 is an explanatory diagram showing the electroforming mold according to the third invention obtained by the same manufacturing method. In addition, (40) and (90) in the drawing are molds, (7) and (27)
, (57), (77) are electroformed shells, (9), (29),
(511), (79) are the first cooling pipes, (109)
, (12i3), (1513), (179) are the second cooling pipes, (10), (30), (80), (80
) is the reinforcing layer, (137), (8?) is the second reinforcing layer, (1
1), (31), (61), and (1111) are formworks. Patent Applicant Honda Motor Co., Ltd. Agent Patent Attorney 2) Part 1 Patent Attorney Kuni Ohashi Patent Attorney Koyama Fig. 1 Fig. 2 Fig. 6 Fig. 5 Fig. 7 Fig. 8 Fig. 9 Fig. 10 Fig. 11 Detail Fig. 19 bl Fig. 20 Fig. 21 Fig. 22 Fig. 23 Fig. 24

Claims (1)

[Claims] 1. A first cooling pipe provided on the back surface of the electroformed shell, a reinforcing layer formed on the back surface of the electroformed shell so as to embed the cooling pipe, and a reinforcing layer provided on the back surface of the reinforcing layer. The second cooling pipe is arranged to form a sealed space on the back side of the electroformed shell, and the space is lined with the electroformed shell and a reinforcing layer, and the second cooling pipe is embedded and fixed. An electroforming mold comprising: a mold filled with a shrinkable fluid filler and solidified; 2. A step of coating a conductive release film on the product shape surface of the model type, a step of depositing an electroformed shell on the conductive release film, and a step of disposing a first cooling pipe on the back side of the electroformed shell, forming a reinforcing layer on the back surface of the electroformed shell so as to embed the cooling pipe therein; arranging a second cooling pipe on the back surface of the reinforcing layer; setting a mold in the electroformed shell. Step: Filling a space between the electroformed shell, the reinforcing layer and the mold with a fluid filler having low shrinkage through the inlet formed in the mold, and filling the second cooling pipe with the fluid filler. a step of embedding the filler in the filler; a step of releasing the model mold from the solidified material that embeds and fixes the mold, the electroformed shell, the reinforcing layer, and the second cooling pipe in the filler; Features of electroforming mold manufacturing method. 3. A first reinforcing layer provided so as to cover the main part on the back side of the electroformed shell, a first cooling pipe provided on the back side of the first reinforcing layer, and an electroformed layer so as to embed the cooling pipe. a second reinforcing layer formed on the back surface of the shell; a second cooling pipe disposed on the back surface of the second reinforcing layer; disposed so as to form a sealed space on the back surface side of the electroformed shell; An electroforming mold comprising: a mold which is lined with an electroforming shell and a reinforcing layer, and is filled and solidified with a low-shrinkage fluid filler for embedding and fixing the second cooling pipe. 4. Coating a conductive release film on the product shape surface of the model type, depositing an electroformed shell on the conductive release film, and forming a first reinforcing layer on the main part of the back side of the electroformed shell. a step of arranging a first cooling pipe on the back surface of the first reinforcing layer, and forming a second reinforcing layer on the back surface of the first reinforcing layer so as to embed the cooling pipe therein; a step of arranging a second cooling pipe on the back surface of the second reinforcing layer; a step of setting a mold on the electroformed shell; and a step of disposing the electroformed shell and the reinforcing layer through an inlet formed in the mold filling the space between the mold and the mold with a low-shrinkage fluid filler and embedding the second cooling pipe in the filler, reinforcing the mold, the electroformed shell, and the mold with the filler 1. A method for manufacturing an electroforming mold comprising the steps of: releasing a model mold from an integrally solidified material in which a layer and a second cooling pipe are embedded and fixed;