JPH01178342A - Manufacture of metallic mold - Google Patents

Abstract

PURPOSE:To effectively use raw material and to effectively execute the work by getting slice panel for cope pattern and slice panel for drag pattern from one piece of thin plate raw material at the time of manufacturing the slice panel forming metallic mold panel. CONSTITUTION:As the slice panel 2 for the cope pattern and the slice panel for the drag pattern are gotten form one piece of thin plate raw material 1, total number of the thin plate raw material 1 to be prepared for manufacturing both metallic mold patterns in the cope 4 and the drag 5 can be done to the half in compared with the conventional case. Further, as the relation between projected part and recessed part is corresponded with the mutually facing positions in the cope 4 and the drag 5, at the time of getting the slice panel 2 for the cope pattern and the slice panel 3 for the drag pattern from one piece of the thin plate raw material 1, the excess of the raw material 1 is scarcely developed. Therefore, the work can be effectively executed and the manufacturing cost can be low.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for manufacturing a mold for press working etc. by full mold casting, and in particular to a method for manufacturing a mold for press working etc. by full mold casting. It is related to the production of models.

(Prior art) Conventionally, as one of the manufacturing methods for manufacturing molds used in press working, casting work, etc., a model of the mold to be manufactured is made of styrofoam material, etc., and the model is used during mold crushing. burying the mold in a mold and injecting molten metal into it, burning out the model buried in the mold crushing by the heat of the molten metal, and filling the cavity formed according to the external shape of the model during the mold crushing with the molten metal. A full mold casting method is known in which a metal mold is obtained using the following methods.

Recently, as a method for producing a mold model used in such full mold casting, efforts have been made to automate and improve accuracy through the introduction of computers and the like. One method is, for example, as disclosed in Japanese Patent Publication No. 61-44620, in which the mold is sliced at equal pitches from the three-dimensional shape data of the mold using a computer, and contour data of each sliced portion is obtained. Based on this contour data, cut out a thin sheet material (such as styrofoam) with a thickness equal to the pitch using a cutter or the like to create a slice panel with a contour shape corresponding to each sliced portion, and then A mold model is obtained by polymerizing and bonding sliced panels to each other.

(Problem to be solved by the invention) By the way, when producing a mold model, the mold consists of an upper mold and a lower mold, so the mold model also consists of two molds, one for the upper mold and one for the lower mold. A model must be made. For this reason, when the above-mentioned mold model manufacturing method is used, a large number of thin plate materials are required for each slice panel, which increases the cost and requires time and effort to cut out the slice panels from those thin plate materials. There was a problem with it.

The present invention has been made in view of the above points, and its purpose is to improve the method of taking out sliced panels from a thin plate-like material so as to make effective use of the material and improve work efficiency. It is meant to be.

(Means for Solving the Problem) In order to achieve the above object, the solution of the present invention is to create a mold model by superimposing a plurality of slice panels on each other, and use the mold model to perform a full mold method. In a mold manufacturing method for manufacturing a mold by casting, when creating the slice panel, a slice panel for an upper model and a slice panel for a lower model are taken from a single thin sheet material. It is something.

(Function) With the above configuration, in the present invention, the slice panel for the upper mold model and the slice panel for the lower mold model are taken out from a single thin plate-like material, so that both the upper mold model and the lower mold model can be removed. The total number of thin plate-like materials that must be prepared to create this will be half that of the conventional case, in which only one sliced panel is taken out from one sheet of thin plate-like material. In addition, since the upper and lower molds have corresponding parts with corresponding unevenness, the sliced panel for the upper model and the sliced panel for the lower model were taken out from a single thin sheet material. Sometimes there is very little extra material.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows the overall steps of a manufacturing method for manufacturing a mold by full mold casting using a mold model, according to an embodiment of the present invention. As shown in FIG. 1, when manufacturing a mold (more specifically, an upper mold and a lower mold), first, a computer displays multiple types of exploded planar images and external planar images of the mold to be manufactured. 2
Input dimensional figure data, create three-dimensional shape data representing the entire image of the mold from the input data (Sl), and further slice the mold at a predetermined pitch in the longitudinal direction of the mold from the three-dimensional shape data. Contour data of the sliced portion is created (S2).

Next, based on the contour data obtained by the computer, a plurality of thin sheet materials made of foamed polystyrene having a thickness equal to the pitch of the sliced portions are subjected to contour shaping processing to form each sliced portion. Create multiple slice panels with contour shapes corresponding to (S
3). The contour processing for creating this slice panel is performed by first drawing the contour shape of each slice portion on recording paper using a printer device, which is the output unit of the computer, based on the contour data of each slice portion obtained by a computer. A paper pattern for each slice portion is created from recording paper, and the paper pattern is used to cut each thin plate-like material into a predetermined contour shape using a cutter.

As a feature of the present invention, in the contour shape processing described above, when creating a slice panel by cutting a thin plate-like material into a predetermined contour shape using a cutter using a paper pattern, a second
As shown in the figure, a slice panel 2 for an upper model and a slice panel 3 for a lower model are taken out from the thin plate material 1 by cutting the central portion of the sheet material 1.

Both slice panels 2.3 taken out from this single thin sheet material form part of an upper model and a lower model corresponding to mutually opposing parts of the upper model and the lower model, The uneven shape on the mold surface side (cutting side) has an inverse relationship. In addition, from the thin plate material 1 to both slice panels 2.3
When cutting out the slice panels 2 and 3, the cut surfaces of the slice panels 2 and 3 are
The mold surface side contour line Ll of each slice panel 2.3, respectively.
It is set on a line obtained by taking a finishing allowance of a predetermined dimension (about 10 mm) from L2.

In this way, when the slice panel 2 for the upper mold model and the slice panel 3 for the lower mold model are taken from a single thin sheet material 1, both the upper and lower mold models are created. The total number of thin plate materials 1 to be prepared is half that of the conventional case in which only one slice panel is taken from one sheet of thin sheet material, so the efficiency of the extraction work can be improved. Moreover, since the upper mold and the lower mold have corresponding portions that are opposite to each other in their unevenness, a slice panel 2 for the upper mold model and a slice panel 3 for the lower mold model are created from a single sheet of thin plate material 1. The excess material when removed is
This is an extreme value corresponding to the gap between the two slice panels 2 and 3 shown in FIG. As a result, materials can be used effectively and the cost of creating a mold model can be reduced.

Next, as shown in FIGS. 3 and 4, a plurality of lower model slice panels 2, 2.・・・
The upper model 4 and the lower model 5 are formed by aligning the upper model slice panels 3゜3, . . . and adhering them with adhesive and polymerizing them.
(S4). Next, the upper model 4 and the lower model 5 are shaped using sandpaper or the like (S5), and then the shaped models are used to form upper and lower molds as molds by full mold casting. Cast each (S6
). As is known, this full mold casting method involves burying a mold model in a mold crusher, then injecting molten metal into the mold crusher, and burning out the mold model buried in the mold crusher by the heat of the molten metal. At the same time, a mold having a shape corresponding to the mold model is obtained by filling a cavity formed according to the external shape of the mold model with molten metal during mold crushing. Through the above steps, manufacturing of the mold is completed.

(Effect of the invention) As described above, according to the mold manufacturing method of the present invention,
When creating the slice panels that form the mold model, by taking a slice panel for the upper mold model and a slice panel for the lower mold model from a single thin plate material,
Since the total number of required thin plate materials can be reduced and the materials can be used effectively, it is possible to improve work efficiency and reduce manufacturing costs.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a manufacturing process diagram of a mold, and FIG. 2 is a perspective view of a slice panel for an upper model and a lower model in a state taken out from a thin sheet material. , 3 and 4 are perspective views of the upper model and the lower model, respectively. 1... Thin plate material, 2, 3... Slice panel, 4
...Upper model, 5...Lower model.

Claims (1)

[Claims] (1) In a mold manufacturing method in which a plurality of slice panels are superimposed on each other to create a mold model, and a mold is manufactured by full mold casting using the mold model, when creating the slice panel described above. , a mold manufacturing method characterized by taking a sliced panel for an upper model and a sliced panel for a lower model from a single thin sheet material.