JPH11333855A - Manufacture of molding die made of synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain cost reduction, lighter weight, simpler recycling, and improved recycling rate. SOLUTION: In a method for molding a model 1 by operating a process machine in accordance with the data on the appearance shape of the model 1 and for producing a molding die 2 for molding the synthetic resin product of the appearance shape of the model 1, the molding die 2 is molded such that the model 1 is mounted in a box frame which is partially open, a frame body 5 is positioned spaced with a predetermined gap 7 above the model 1, synthetic resin torn materials 9 formed in any shape using notch pieces or recycling products used in the other products are put in a predetermined space above the frame body 5, and a predetermined amount of silicon material 4 is then injected in the box frame 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a molding die made of synthetic resin.

[0002]

2. Description of the Related Art Conventionally, although there is no publicly known gazette, a processing machine is operated based on data on the appearance of a model to form the model, and a molding die for molding a synthetic resin product having the appearance of the model is manufactured. A method for manufacturing a synthetic resin molding die in which the molding die is placed in a box frame partially open, and a predetermined amount of silicone material is injected into the box frame and molded. Is known.

[0003]

In the above-mentioned known example, a model is placed in a box frame and filled with a silicon material to form a molding die. Therefore, the cost of the silicon material is extremely high, and the weight of the silicon material is extremely high. However, there is a problem that the processing of a used molding die is troublesome.

[0004]

The object of the present invention is to reduce costs, reduce weight, facilitate recycling, and improve the recycling rate.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a processing machine is operated on the basis of data on the external shape of a model 1 to form the model 1, and the external shape of the model 1 is molded for forming a synthetic resin product. In the method of manufacturing the mold 2, the molding die 2 is configured such that the model 1 is placed in a box frame 6 which is partially open, and a predetermined gap 7 is opened above the model 1 to form a frame 5.
Is placed in a predetermined space above the frame body 5 and a cutout piece or a synthetic resin broken material 9 formed into an arbitrary shape by using a recycle product used for another product is put into the predetermined space. This is a method for manufacturing a synthetic resin molding die in which a predetermined amount of the silicon material 4 is injected into the mold 6. The present invention provides a method for manufacturing a synthetic resin molding die in which a plurality of holes 10 are provided in the broken material 9.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a process for producing a resin molded product on the left side, and shows some specific processes on the right side. In the process, data of the external shape of the model 1 to be created is created, and a machining machine is operated based on the data to produce the model 1 by a machining method such as cutting a hard urethane resin material or the like (referred to as NC machining). The present invention relates to a method for manufacturing a molding die 2 for molding a synthetic resin product which is manufactured by copying the external shape of the model 1.

[0007] Of the above steps, the manufacturing steps are programmed and the model manufacturing is automated. However, the manufacturing of the forming mold for manufacturing the forming mold 2 is a manual operation.
ineffective. The present invention is an improvement of the molding die manufacturing process. FIG. 2 schematically shows the entire molding die manufacturing process of the present invention. The upper surface of the model 1 processed and formed by the model manufacturing process is deformable from above, such as a wire mesh, and is made of a silicon material described later. The frame 5 having a gap through which the frame 4 passes is brought into contact with the frame 5 so as to conform to the approximate shape of the model 1.

Next, the model 1 is placed on a box-shaped box frame 6 having an open upper surface, and the frame 5 is mounted above the model 1 so as to leave a gap 7 at a predetermined interval. In the embodiment, the frame 5 is suspended from the mounting shaft 8, and the mounting shaft 8 is fixed to the box frame 6 and mounted. It is preferable that a plurality of the mounting shafts 8 be arranged in the front-rear direction so that the frame body 5 can be hung stably. When the gap 7 between the model 1 and the frame 5 is set to about 25 mm to 40 mm, the uneven shape of the model 1 can be accurately copied and formed by the silicon material 4, and the amount of the silicon material 4 used can be reduced. As a result, the weight and cost can be reduced, which is preferable. In the above state, a broken material 9 is charged above the frame 5. The broken material 9 is formed into an arbitrary shape by using a cutout piece of hard urethane hard material generated at the time of manufacturing the model 1 or a recycled product that reuses a piece used for another product. Further, a through hole 10 is formed in the fractured material 9. The through hole 10 is expected to strengthen the connecting action of the broken materials 9 by the silicon material 4.

[0009] If the broken material 9 is prepared in various shapes and sizes, it can be inserted without gaps.
It is suitable. Accordingly, a large broken space 9 having a shape close to a large rectangular shape (a rectangular parallelepiped) is put in a large space, and a small broken material 9 is put in a small space. The broken material 9 is the mounting shaft 8
The same as or slightly above, and presser body 1 above broken material 9
Put 1 on. The holding body 11 is also formed of a wire mesh or the like so that the silicon material 4 can pass therethrough, similarly to the frame 5. A plurality of holding shafts 12 are attached above the holding body 11 at predetermined intervals, and then the silicon material 4 is injected into the box frame 6. After the silicone material 4 is injected, secondary bleeding is performed, and thereafter, the mold is taken out of the box frame 6 to form the mold 2. The entire outer peripheral surface of the molding die 2 is formed of the silicon material 4.
Is formed on a model mold surface 14 on which a precise shape is photographed by the silicon material 4. A frame 5 is provided inside the model mold surface 14, and a broken material 9 is provided next to the frame 5. It is encapsulated together and hardened.

[0010]

Next, the operation will be described. Since the frame 5 is provided above the model 1 in the box frame 6 and the frame 5 is provided, the silicon material 4 is filled in the gap 7 between the upper surface of the model 1 and the frame 5, and the conventional molding is performed. The same performance as that of the mold 2 is obtained. Since the frame 5 is formed of a deformable member such as a wire mesh, it is easy to match the shape of the model 1 and the gaps 7 can be formed at substantially the same interval (size). In this case, it is preferable that the frame body 5 be reinforced so as to maintain the shape after conforming to the shape of the model 1 without deforming even when the broken material 9 is thrown in and without lowering the manufacturing accuracy.

The model 1 is placed in the box frame 6. The box frame 6 only needs to have a box shape with an open wooden upper surface, so that the manufacturing cost is only the material cost and the overall cost can be reduced. . Since the broken material 9 is put into the box frame 6 above the frame body 5, the volume of the broken material 9 in the volume of the box frame 6 does not require the silicon material 4, and the material cost is reduced. I do. Broken material 9
Is a notched piece of hard urethane hard material, the specific gravity is lower than that of the silicon material 4, and the weight of the completed molding die 2 is reduced, so that the weight can be reduced. Moreover, since the recycle material which reuses what was used for the other material as the broken material 9 can be used, the recycling effect is improved.

Further, since the broken material 9 is prepared in various shapes of various sizes, not only can it be inserted without any gaps, but also the loading operation can be facilitated. Further, since the through hole 10 is formed in the fractured material 9, the silicon material 4 penetrates into the through hole 10 to perform a connecting action and stabilize the shape of the molding die 2.

[0013]

According to the present invention, a processing machine is operated on the basis of data on the external shape of the model 1 to form the model 1 and a molding die 2 for molding a synthetic resin product having the external shape of the model 1 is manufactured. In the method, the molding die 2 is configured such that the model 1 is placed in a partially open box frame 6, and a frame 5 is disposed above the model 1 with a predetermined gap 7 therebetween. Into a predetermined space above the body 5, a broken material 9 made of a synthetic resin formed into an arbitrary shape by using a notch piece or a recycled product used for another product is put, and then the silicon material 4 is put in the box frame 6. Is injected into the mold in a predetermined amount to form a molding die made of a synthetic resin. Therefore, the silicon material 4 having a predetermined thickness can be reduced without lowering the manufacturing accuracy, thereby reducing the weight of the silicon material. Effects of reducing costs, facilitating recycling, and improving the recycling rate Unlikely to. The present invention is a method for manufacturing a synthetic resin mold having a plurality of holes 10 formed in the fractured material 9, so that the shape of the mold 2 is stabilized.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a process.

FIG. 2 is a cross-sectional view of the entire process.

FIG. 3 is a manufacturing process diagram of a frame.

FIG. 4 is a set state diagram of a model.

FIG. 5 is a set state diagram of a frame.

FIG. 6 is a diagram showing the state of input of broken materials.

FIG. 7 is a set state diagram of a presser body and a presser shaft.

FIG. 8 is a diagram showing a silicon material injection state.

FIG. 9 is a sectional view of a molding die.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Model, 2 ... Molding mold, 4 ... Silicon material, 5 ... Frame body, 6 ... Box frame, 7 ... Gap, 8 ... Mounting shaft, 9 ... Fracture material, 10
... Holes, 11 holding body, 12 holding shaft, 14 model surface.

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[Procedure amendment]

[Submission date] September 14, 1998

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 4

FIG. 2

FIG. 3

FIG. 6

FIG. 7

FIG. 5

FIG. 8

FIG. 9

Claims (2)

[Claims] 1. A method for manufacturing a molding die 2 for molding a synthetic resin product having an appearance of the model 1 by operating a processing machine based on data of the appearance of the model 1 to form the model 1. In the molding die 2, the model 1 is placed in a box frame 6 partially opened, and a frame 5 is arranged above the model 1 with a predetermined gap 7 therebetween. In a predetermined space above the crushed piece 9 made of a synthetic resin formed in an arbitrary shape by using a cutout piece or a recycled product used for another product
And then injecting a predetermined amount of the silicon material 4 into the box frame 6 to form a molding die made of synthetic resin. 2. The method according to claim 1, wherein the broken material 9 has a plurality of holes 10 formed therein.