JPH0453606B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for manufacturing a press mold, and more particularly, a method for manufacturing a simple press mold in which resin and sprayed metal are formed on the surface of a material constituting the press mold. It is related to.

(Prior Art) As a conventional method for manufacturing a simple press mold, for example, the method shown in FIG. 1 is used. That is, the disposable model 2 shown in B is created by applying plaster or the like to the surface of the master model 1 shown in A of the same figure, and after this disposable model 2 is dried and solidified, plaster or the like is again applied to the surface to create the disposable model 2 shown in C. A reference model 3 is created as follows. Next, as shown in D, a die face 4 is attached to the side surface of the reference model 3 to produce a reference model 5.

A thermal spray model 6 for a punch is formed using a resin or the like as shown in E on the surface of the standard model 5 thus obtained, and includes a recess formed in the thermal spray model 6 for a punch as shown in F. A sprayed metal layer 7 is formed on the surface. Note that 6a is a reference hole provided in the thermal spray model 6 for the punch, and is formed by the protrusion 5a provided in the standard model 5 in the step E. Next, insert two reference pins 8 for positioning into the reference holes 6a as shown in G (see Figure 3).
Further, weirs 9, 9 for preventing the resin from flowing out are provided, and a resin layer 10 such as epoxy is formed, followed by lining using a backing material 11, and then removed from the mold as shown in H to produce a thermal spray mold 12 for a punch.

Furthermore, in order to produce a thermal spray mold for a blank holder, a large resin layer 13 is formed on the surface of the standard model 5 to form a thermal spray model for a blank holder, as shown in FIG. A reference hole 13a is provided by means of a method, and sprayed metals 14, 14 are formed as shown in J. Next, insert the reference pins 15, 15 into the reference hole 13a shown in K (fourth
(see figure), and weirs 16, 16 for preventing resin outflow.
After forming a resin layer 17 in the area surrounded by the weirs 16 and 16, lining is performed using a lining material 18, and then the mold is removed as shown in L to produce a thermal spray mold 19 for a blank holder. is completed.

However, in the conventional manufacturing method of simple press molds, two different thermal spray models, one for the punch and the other for the blank holder, must be created at the process stage, which increases material costs and There is a drawback that the processing cost increases, and in particular, in order to obtain many types of press molds used in manufacturing vehicles, etc., following the above process has the disadvantage of further increasing the cost.

(Objective of the Invention) The purpose of the present invention is to provide a manufacturing method that eliminates the drawbacks of the above-mentioned conventional simple press mold during manufacturing, reduces both material costs and processing costs, and shortens the process. That is.

(Structure and operation of the invention) In order to achieve the above-mentioned object, the present invention includes a step of producing a disposable model from a reference master model when manufacturing a simple press mold, and a step of producing a reference model further produced from the disposable model. A step of manufacturing a standard model by attaching a die face to the side surface, and a step of manufacturing a common model used when manufacturing punches and blank holders from the standard model,
After applying a mold release agent to the recesses formed in the common model, a sprayed metal layer is formed on the surface including the recesses, a resin layer and a backing material are formed, and then the mold is removed and sprayed for punching. After the process of making a mold and applying a mold release agent on the end side surface of the common model after demolding,
To provide a method for manufacturing a simple press mold, which comprises the steps of applying a thermal spray metal layer, forming a resin layer and a backing material, and then removing the mold to produce a thermal spray mold for a blank holder. is the main focus. According to the above manufacturing method, a manufacturing method is provided in which a common model can be used in common when manufacturing a thermal spray mold for a punch and a thermal spray mold for a blank holder.

(Example) The present invention will be described in detail below based on the drawings. That is, in FIG. 2, the surface of the master model 21 shown in A is coated with plaster or the like to create the disposable model 22 shown in B, and after this disposable model 22 is dried and solidified, the surface is again coated with plaster or the like. Then, a reference model 23 is prepared as shown in C. Next, as shown in D, a die face 24 is attached to the side surface of the reference model 23 to produce a standard model 25. The steps up to producing the standard model 25 in this way are completely the same as the conventional method. Next, as shown in E, a common model 26 is made using resin or the like on the surface of the standard model 25, and then, as shown in F, a sprayed metal layer 27 is formed on the surface including the recesses formed in the common model 26. Form. Note that 26a is a reference hole provided in the common model 26, and is formed by the protrusion 25a provided in the standard model 25 in the step E. Two reference pins 28, 28 are inserted into this reference hole 26a as shown in FIG.
As shown in Figure G, weirs 29, 2 for preventing resin outflow.
9 and after forming a resin layer 30 such as epoxy,
Backing is performed using a lining material 31, and then the mold is removed as shown in H to produce a thermal spray mold 32 for a punch.

On the other hand, the following method is used to produce a thermal spray mold for a blank holder. That is, as shown in FIG. 1, the common model 26 is used as it is, and the sprayed metal layers 33, 33 are formed as shown in J. Next, insert the two reference pins 34, 34 into the reference holes 26b provided in the common model 26 at the positions shown in FIG. and the said weir 35, 35
After forming the resin layer 36 in the area surrounded by , lining is performed using a lining material 37, and then the mold is removed as shown in L to complete the production of the thermal spray mold 38 for a blank holder.

(Effects of the Invention) As explained in detail above, according to the present invention, one common model can be created and a thermal spray mold for a punch and a thermal spray mold for a blank holder can be manufactured using this common model. This eliminates the need to separately create a thermal spray model for a punch and a thermal spray model for a blank holder as in the past, and eliminates the need for expensive material and processing costs for manufacturing molds, resulting in a significant cost reduction. . In particular, production lines that require various drawing processes such as automobiles require many types of press dies, so it is necessary to prepare a wide variety of simple press dies to cope with this. The method disclosed in 2007 has a particularly great advantage of omitting one step in press mold production, and is extremely effective in reducing vehicle manufacturing costs.

[Brief explanation of the drawing]

Fig. 1 is a sectional view sequentially showing the manufacturing process of a conventional simple press mold, Fig. 2 is a sectional view sequentially showing the manufacturing process of a simple press mold according to the present invention, and Fig. 3 is a transition to step G in Fig. 1. 4 is a perspective view showing the state when moving to step K in FIG. 1, and FIG. 5 is a perspective view showing the state when moving to step G in FIG. 2. , FIG. 6 is a perspective view showing the state when moving to step K in FIG. 2. 21...Master model, 22...Discard model, 23...Standard model, 24...Dieface, 25...Standard model, 26...Common model,
27, 33... Sprayed metal layer, 28, 34... Reference pin, 29, 35... Weir, 30, 36... Resin layer, 31, 37... Lining material, 32... Sprayed mold for punch, 38... ...Thermal spray type for blank holder.

Claims (1)

[Claims] 1. When manufacturing a simple press mold by forming a resin layer and a sprayed metal layer on the surface of a press mold material made from a reference model, a process of creating a disposable model from a reference master model, and the process of creating a disposable model A step of manufacturing a standard model by attaching a die face to the side surface of the reference model further manufactured from the standard model, a step of manufacturing a common model to be used when manufacturing punches and blank holders from the standard model, and a recess formed in the common model. After applying a mold release agent inside, a sprayed metal layer is formed on the surface including the recesses, and a resin layer and a backing material are further formed, and then the mold is removed to produce a thermal spray mold for punch, and after demolding. After applying a mold release agent on the end side surface of the common model, forming a sprayed metal layer, further forming a resin layer and a backing material, and removing the mold to produce a sprayed mold for a blank holder. A method for manufacturing a simple press mold, characterized by comprising: