JP2967887B2 - Method for manufacturing slush molding die for producing synthetic resin skin - Google Patents

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 slush molding die for producing a synthetic resin skin.

[0002]

2. Description of the Related Art Conventionally, this kind of molding apparatus is disclosed in
No. 12644 is disclosed. This molding apparatus has been previously proposed by the present applicant.
The second plate-shaped member is joined to the back surface thereof, and the second plate-shaped member is provided with a plurality of parallel ridges and one peripheral ridge. A jacket including a limited plurality of parallel flow paths is formed between the jacket and the first plate-shaped member.

[0003]

In the above prior art, the second plate-shaped member needs to be formed with a ridge in order to provide a jacket channel between the second plate-shaped member and the first plate-shaped member. Therefore, a press-formed steel plate material is used.

According to the above-mentioned prior art, when a model is added or a product shape is changed, since a press-formed product made of a steel plate material is used as described above, the press-forming die takes into account regulation of a jacket flow path, press-formability, and the like. It is necessary to manufacture with the mold configuration which was done, as a result, there is a disadvantage such as an increase in the number of molds used for the manufacture,
There is a problem such as a significant increase in manufacturing cost.On the other hand, molds manufactured using the obtained press-formed members may have some variations in the mold temperature distribution, and the quality of molded products There is room for improvement.

The present invention has been made to solve the problems of such conventional slush molding dies, and the object thereof is to facilitate the production of the mold and to reduce the production cost. An object of the present invention is to provide a method of manufacturing a slush molding die capable of improving the quality of a molded product.

[0006]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a first plate-like member having a surface forming a mold surface having a predetermined shape, A second plate-shaped member joined to the back surface of the member and forming a jacket between the first plate-shaped member and a synthetic resin made to flow a heat medium such as oil through the jacket. A method of manufacturing a slush molding die for producing a skin, a step of subjecting the surface of the model having an uneven pattern to a silver film treatment to produce an electroformed model having a conductive layer formed on the surface; and Is immersed in an electroforming tank and electroformed to form an electroformed shell having an uneven pattern on the molding surface of the electroformed model. The first with
Forming a plate-like member, and laminating and adhering a sheet wax equivalent to the thickness of the first plate-like member on the surface of the jacket model, and projecting on the sheet wax an amount equivalent to the jacket flow path. Laminate the sheet wax part, polymerize and stick,
Attaching a hole forming member to the upper surface of the protruding sheet wax portion, and applying a silver film treatment to the surface of the jacket model to which the sheet wax, the protruding sheet wax portion and the hole forming member are attached to form a conductive layer. Forming, the model with the conductive layer formed thereon is immersed in an electroforming tank and subjected to electroforming, forming an electroformed shell on the surface of the electroformed model, and releasing the electroformed shell from the model. Forming a second plate-shaped member having a flange portion in a peripheral portion and having an upwardly bulging recess forming a jacket channel by the projecting sheet wax portion; and the first plate-shaped member. And a second plate-shaped member are overlapped, and a cylindrical nut member is connected to the back surface (upper surface) of the first plate-shaped member based on the hole formed by the hole forming member of the second plate-shaped member. And erecting, and a first erecting the cylindrical nut member
A second plate-shaped member is superimposed on the nut member on the plate-shaped member, and the peripheral flange portions are joined to each other, and the back surface (upper surface) of the first plate-shaped member and the second plate-shaped member are connected to each other. A heat medium distribution jacket is formed between the recess and the recess, and this portion of the first plate-like member is connected to the second plate-like member via the cylindrical nut member disposed in the jacket. Fasten to the part
And a process .

[0007]

According to the above-mentioned means, there is no need to manufacture a mold for molding the second plate-shaped member of the prior art described above,
Sheet wax or the like can be directly adhered to the model, and the plate-shaped portion and the jacket flow path can be easily formed by electroforming, thus facilitating the manufacture of the mold and reducing the cost. In the part, the design and accuracy can be easily obtained to allow the heat medium to flow efficiently and also to provide the temperature control effect with high efficiency, and therefore the quality of the molded product molded by this mold is improved. I do.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an explanatory cross-sectional view of a model for forming a first plate-shaped member having a mold surface formed on the surface, FIG. 2 is an explanatory cross-sectional view of forming an electroformed shell by the model, and FIG. Explanatory sectional view of the obtained first plate-shaped member, FIG. 4 is an explanatory diagram of plate thickness adjustment, FIG. 5 is an explanatory diagram showing processing of a flange portion, and FIG. 6 is a second plate-shaped member formed by a model. FIG. 7 is an explanatory cross-sectional view in which sheet wax equivalent to a sheet thickness is adhered, and FIG. 7 is a diagram in which sheet wax is partially polymerized to form a jacket portion, and a pipe material is adhered to form a hole. FIG. 8 is an enlarged view of a main part of FIG. 7, and FIG.
FIG. 10 is an explanatory diagram showing an electroformed shell formed as a plate-shaped member of FIG. 10, FIG. 10 is an explanatory diagram of an obtained electroformed shell, FIG. 11 is an explanatory diagram of plate thickness adjustment, FIG. FIG. 13 shows the first,
FIG. 14 is an explanatory view showing adjustment of the second plate-like member. FIG. 14 is an explanatory view showing a state where a spacer is attached to the first plate-like member.
Is an explanatory view showing a state where the pipe joint is welded, and FIG. 16 is a sectional view of the obtained mold.

FIG. 1 shows a model 1 for forming a first plate-like member forming a forming portion. The model 1 is, for example, a model 1 in which an uneven pattern is formed on the surface using an epoxy resin or the like over a cow skin or the like.
The surface of the model 1 has a cowskin pattern formed thereon. A silver film treatment is performed on the surface 2 having the concavo-convex pattern of the model 1, a conductive layer is formed on the surface, and an electroforming model is manufactured.

Next, the electroformed model 1-1 having the surface conductively treated as described above is immersed in a nickel plating solution in an electroforming tank and electroformed, and after a predetermined time, the surface of the model 1-1 is subjected to electroforming. The electroformed shell 3 is formed. This is shown in FIG.

[0011] The resulting electrostatic Ikara above was released from the model 1-1, electrostatic obtain a first plate-like member 4 made of Ikara, the front surface 4-1 for example glass beads of the plate-like member 4 or the like to collide with honing process, the surface 4-1 grinding rather. This is shown in FIG.

Subsequently, as shown in FIG. 4, the thickness of the molding surface 4-2 is adjusted, and as shown in FIG.
-3 is machined or the like so that it can be overlapped with and joined to a flange portion of a second plate-like member described later.

Next, the manufacture of the second plate member will be described. As shown in FIG. 6, a sheet wax 7 corresponding to the thickness of the first plate member 4 is superimposed on the surface 6 of the jacket model 5. Stick it. On this sheet wax 7, a projecting sheet wax portion 8...
The protruding sheet wax portion 8 is cut into sheet wax material to a required size, and a plurality of sheets are laminated and polymerized.
Get the required depth.

In addition to the above, a hole forming member 9 made of a resin pipe material or the like for forming a nut hole, which will be described later, is adhered to the upper surface of the protruding sheet wax portions 8. Hole machining after electroforming was abolished. The above is shown in an enlarged manner in FIG.

As described above, the surface of the model 5 to which the sheet waxes 7 and 8 and the hole forming member 9 are adhered is subjected to a silver film treatment in the same manner as described above to form a conductive layer, and the conductive-treated model is placed in an electroforming tank. It is immersed in a nickel solution and electroformed. A model 5 having the obtained electroformed shell 10 is shown in FIG.
Numeral 0 is formed with a gap from the model 5 corresponding to the thickness of the sheet wax 7, and a protruding sheet wax portion 8 forms a jacket channel portion that is recessed upward. Then, a hole is formed in the jacket channel portion by the hole forming member 9.

The electroformed shell obtained above is released, and the second plate-like member 11 is shown in FIG. 10. The plate-like member 11 is jacketed by superposition and joining with the first plate-like member 4. The recesses 11-1 to form a path, the main body 11-2 to be joined to the back surface of the first plate-like member 4, and the peripheral flange 11-3 are formed. 9 is the recessed part 11-
1 has a hole 11-4. Therefore, no hole machining is required. The above-mentioned second plate-like member 11 is subjected to a honing treatment with glass beads or the like in the same manner as described above, and this is
0 is also shown.

After that, as shown in FIG. 11, the thickness is adjusted, and subsequently, the flange portion 11-3 is machined so as to be overlapped with and joined to the flange portion 4-3 of the first plate member 4.

The first and second plate members 4 and 11 obtained above are superimposed on each other, and the back surface (upper side) of the first plate member 4 is
Surface) Hole 11 of second plate-like member 11 superimposed on 4-5
Cylindrical nut member 1 that forms a spacer based on -4 ...
2. Determine the mounting position. Thereafter, the first plate-shaped member 4
The nut members 12 are joined and erected by welding or the like on the back surface of.
This is shown in FIG. The nut members 12 are erected while the second plate-shaped members 11 are overlapped and the mounting positions are confirmed by the holes 9 so that the positioning is performed with high accuracy.

Subsequently, the first plate-shaped member 4 having the nut members 12... And the second plate-shaped member 11 are superimposed on each other to form flange portions 4-3, 11-3, and the first plate-shaped member. The back surface of the plate-shaped member 4 and the body 11-2 of the second plate-shaped member 11 excluding the recessed portions 11-1. A large-diameter hole 11-6 is previously formed in a part of the flange part 11-3, and a pipe joint 13 is fitted into this part,
Join by brazing or the like. This is shown in FIG.

The first plate-like member 4 and the second plate-like member
The plate member 11 is attached to a mold 15 as shown in FIG.
Are screwed together to fasten the recessed portion 11-2, and one pipe joint 13 connects the heating medium to the inlet pipe 17 and the other pipe joint (not shown) to the discharge pipe 18. As described above, the heat medium flow paths 21 are provided on the back side of the front mold surface 20 as shown in FIG.
A slush molding die 19 including the heat medium flowing jacket 22 is configured.

[0021]

As apparent from the above, according to the present invention,
In claim 1, the first plate-shaped member on the surface constituting the molding die surface of a predetermined shape, and the back surface of the first plate-shaped member,
A second plate forming a jacket between the first plate member and the first plate member;
In the method of manufacturing a slush molding die for manufacturing a synthetic resin skin made of a plate-shaped member made of a synthetic resin and allowing a heat medium such as oil to flow through the jacket, the surface of the model having an uneven pattern on the surface A process of producing an electroformed model having a conductive layer formed on the surface by subjecting the electroformed model to a silver film treatment, and immersing the electroformed model in an electroforming tank and performing an electroforming process. Forming a first plate-shaped member having a flange portion around the periphery by releasing the electroformed shell from the model; and forming a first plate-shaped member on the surface of the jacket model. A sheet wax equivalent to the thickness of the member is superimposed and adhered, and a protruding sheet wax portion equivalent to a jacket flow path is laminated, superposed and adhered on the sheet wax, and an upper surface of the protruding sheet wax portion Attaching a hole forming member to the sheet, The surface of the jacket model on which the wax portion and the hole forming member are adhered is subjected to a silver film treatment to form a conductive layer, and the model having the conductive layer formed thereon is immersed in an electroforming tank to perform electroforming. An electroformed shell is formed on the surface of the cast model, the electroformed shell is separated from the model, and a flange portion is provided at a peripheral portion thereof. Forming a second plate-like member having a protrusion, superimposing the first plate-like member and the second plate-like member, and forming a second plate-like member on the back surface (upper surface) of the first plate-like member. A step of combining and erecting a cylindrical nut member with reference to a hole formed by the hole forming member of the plate member; and a step of forming a second plate on the first plate member having the cylindrical nut member erect. The nut member is overlapped with the nut member, and the peripheral flange portions are joined to each other, and the back surface (upper surface) of the first plate member and the second plate A heat medium distribution jacket is formed between the first plate member and the concave portion of the member, and this portion of the first plate member is connected to the second plate member via a cylindrical nut member disposed in the jacket portion. Work to fasten to this part
Process, so that a plate-shaped member constituting a molding die,
Above all, the second plate-shaped member provided with the jacket portion is formed by applying a sheet wax to a model to form a recessed space portion forming the jacket portion by conductive treatment and electroforming. The slush molding die can be manufactured at a low cost and at an early stage at a low cost, as compared with the molding.

[0022] In the case of press molding is restricted by the shape of the jacket portion in a press mold constraints, the present invention provides a jacket portion is optimally attached as required sheet wax model Since the second plate member having the following characteristics is formed by electroforming, a jacket part having extremely high precision can be manufactured as designed, a mold having the best heat medium flow efficiency can be manufactured, and a slush molding metal having excellent performance can be manufactured. The mold can be easily obtained, and therefore, the quality of the product obtained by the molding die according to the present invention is improved.

Further, since the first plate-like member and the second plate-like member are joined by a jacket portion, and a hole for inserting a nut member, which forms a spacer, is formed at the same time as electroforming. It is no longer necessary, and this also simplifies production,
The number of man-hours at the time of manufacturing is greatly reduced, and the cost can be reduced in addition to the above.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view of a model for forming a first plate-like member having a forming die surface formed by the surface thereof;

FIG. 2 is an explanatory cross-sectional view of forming an electroformed shell using the model of FIG.

FIG. 3 is an explanatory sectional view of a first plate member obtained by electroforming.

FIG. 4 is an explanatory diagram of plate thickness adjustment.

FIG. 5 is an explanatory view showing processing of a flange portion.

FIG. 6 is an explanatory diagram of forming a second plate-like member by a model, and is an explanatory cross-sectional view in which sheet wax equivalent to the plate thickness is adhered.

FIG. 7 is an explanatory view in which sheet wax is partially polymerized to form a jacket portion and a pipe material is stuck to form a hole.

FIG. 8 is an enlarged view of a main part of FIG. 7;

FIG. 9 is an explanatory view showing an electroformed shell forming a second plate-like member as described above.

FIG. 10 is an explanatory view of the electroformed shell obtained above.

FIG. 11 is an explanatory view of adjusting the thickness of a plate-like member made of an electroformed shell obtained above.

FIG. 12 is an explanatory view showing processing of a flange portion of the plate-like member.

FIG. 13 is an explanatory view showing the stacking and adjustment of the first and second plate members.

FIG. 14 is an explanatory view showing a state where a spacer is attached to the first plate-shaped member.

FIG. 15 is an explanatory view showing a state where a pipe joint is welded.

FIG. 16 is a sectional view of the mold obtained above.

[Explanation of symbols]

1,5: model, 3,10: electroformed shell, 4: first plate member, ... 4-3, 11-3 flange portion, 7,8: sheet wax, 9: hole forming member, 12: spacer ,
15: Mold, 21: Heat medium passage, 22: Jacket.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B29C 41/00-41/52 B29C 33/00-33/76

Claims (1)

(57) [Claims] 1. A first plate-shaped member on a surface constituting a mold surface of a predetermined shape, and a back surface of the first plate-shaped member,
A second plate forming a jacket between the first plate member and the first plate member;
Surface consists of a plate-like member, in the manufacturing method of slush molding die for producing a synthetic resin skin which is adapted to circulate a heat medium such as oil into the jacket, model having a rugged pattern on the surface of Subjected to silver film treatment,
A step of manufacturing an electroformed model having a conductive layer formed on the surface thereof, and immersing the electroformed model in an electroforming tank to perform an electroforming process, and forming an electroformed shell having an uneven pattern on a molding surface of the electroformed model. Forming and releasing the electroformed shell from the model to form a first plate-like member having a flange at the periphery; and forming a thickness of the first plate-like member on the surface of the jacket model. A sheet-forming portion of the protruding sheet wax is laminated and polymerized and adhered on the sheet wax, and a hole forming member is formed on the upper surface of the protruding sheet wax portion. Attaching a sheet film, a protruding sheet wax portion, a silver layer treatment on a surface of the jacket model to which the hole forming member is attached, forming a conductive layer, and electroforming the model having the conductive layer formed thereon. Immerse in a tank and perform electroforming, and place an electroformed shell on the surface of the electroformed model. A second plate having a flange portion around the periphery of the electroformed shell separated from the model and having an upwardly swelled concave portion forming a jacket channel by the protruding sheet wax portion. Forming the plate-like member; and superposing the first plate-like member and the second plate-like member, and forming a hole in the second plate-like member on the back surface (upper surface) of the first plate-like member. Joining and erecting a cylindrical nut member with reference to the hole formed by the member; and mounting the second plate member on the first plate member having the cylindrical nut member erect. Overlap with the member and join the peripheral flange parts to each other, and the back surface (upper surface) of the first plate-shaped member
Forming a heat medium flow jacket between the first plate-shaped member and the recessed portion of the second plate-shaped member, and this portion of the first plate-shaped member via the cylindrical nut member arranged in the jacket And a step of fastening to a second plate-shaped member of the slash molding die.