JPS6240940A - Molding method for copying model - Google Patents

Abstract

PURPOSE:To improve the workability by assembling a master model to a frame body which has formed a wrinkle holding surface on the surface, using it for molding of a copying model, and executing in parallel both working of the frame body and a preparation of the master model. CONSTITUTION:A wrinkle holding surface 3 is formed on the surface of a frame body 1 made of foam polystylene by a numerical control working device 2. In such a case, as for the frame body, that which has conformed with a size and a shape of a master model 4 is used. Subsequently, the master model 4 is held at a prescribed position by jacks 5, 6, the frame body 1 is assembled exactly, and a mold surface 7 and the wrinkle holding surface 3 are connected as one body. In such a state, plaster is injected onto the mold surface 7 and solidified, consequently, a copying model 9 is molded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a copying model, and more particularly to a method for manufacturing a copying model for mold processing.

[Conventional technology]

To manufacture molds, for example press molds for several processes, a copy model made of plaster or the like is used. Furthermore, this imitation model is created using the master model. When making a copy model for mold processing from a master model, the wrinkled surfaces other than the product part mold surface are conventionally created by using a wooden frame, clay, etc. to add finishing allowance around the product part mold surface of the master model. A concave plaster model is formed and roughly shaped by injecting a molding agent such as gypsum into the mold surface where the product part and the wrinkled surface part are integrated, and the wrinkled surface is numerically controlled (No) again using data. It was made by finishing the surface.

[Problem that the invention seeks to solve]

However, since conventional methods use wooden frames and clay, it takes time (man-hours) for rough modeling and clay modeling. Furthermore, the lead time is long, and various requests cannot be responded to quickly. Furthermore, there is a drawback that there is a lot of waste because No processing is performed after rough modeling.

The present invention is intended to solve the above-mentioned problems in the prior art, and its purpose is to provide a copy model manufacturing method that eliminates wasteful rough modeling processes and reduces man-hours and lead time. be.

[Means for solving problems]

That is, the method for manufacturing a copy model of the present invention involves numerically controlling the surface of a foamed polystyrene frame to form a wrinkled surface, and then assembling the frame to a master model to form a mold surface of the product part of the master model. The method is characterized in that after the mold surface and the wrinkle-stretching surface of the frame are integrally connected, a molding agent is injected onto the integrated mold surface and solidified.

The expanded polystyrene frame should have an appropriate size and shape depending on the size and shape of the master model. If it surrounds the master model and can be fitted, it can be easily attached to the master model.

The entire frame may be integrated into one piece, or a plurality of partial parts may be integrated using adhesive, adhesive tape, or the like.

Numerical control processing is performed on the frame using data stored in the combinator in advance to form the wrinkled surface.

Next, this frame is assembled to the master model. On this occasion,
The mold surface of the product part of the master model and the wrinkle-stretching surface formed on the frame are integrally connected. If there is a gap between the master model and the frame, it is a good idea to seal it using clay.

Next, a molding agent such as gypsum is injected onto the integrated mold surface and allowed to harden. If necessary, finish processing is performed on the mold surface of the molded copy model.

〔Example〕

The present invention will be explained in further detail in the following examples and conventional examples for comparison. Note that the present invention is not limited to the following examples.

Embodiment: FIG. 1 shows a method for forming a copy model according to the present invention. first,
As shown in FIG. 1(a), a frame made of expanded polystyrene 1
A wrinkle-stretching surface 3 is formed on the surface by a numerically controlled processing device 2. Next, as shown in (b), the master model 4 is held at a predetermined position, for example, at a position inclined in the press direction, by the jacks 5.6, and the frame body 1 is accurately assembled thereto, so that the mold surface 7 of the product part and The wrinkle-stretching surface 5 is integrally connected.

Gap 8 is filled with clay and cooled if necessary. When plaster is injected onto the integrally connected mold surfaces and allowed to solidify, a concave copying model 9 having a predetermined thickness (for example, 50 mm) as shown in FIG. 3(C) is obtained. The copying model 9 is held in a predetermined position by a metal frame 10 or a steel pipe support 11, and after being subjected to finishing processing, it is used, for example, in manufacturing a press mold.

Conventional example: FIG. 2 shows an example of a conventional copying model manufacturing method. Figure 2 ((1) As shown, the master model 4 is tilted in the pressing direction using jacks 5 and 6, and the wooden frame 1 is
2 and clay 13, the wrinkle pressing surface 3 is finished and roughly shaped. After injecting plaster onto the mold surface and solidifying it to obtain a concave rough profile model 9 of a predetermined thickness, the finishing part is processed using the numerically controlled processing device 2, as shown in (e). Then, further finishing processing is performed to obtain a copy model 9f. In this way, conventionally, the wrinkle-stretching surface 3 is formed by using a wooden frame or clay, taking into account the finishing allowance A, which takes time to form.
It was not possible to prepare the master model and form the wrinkle-stretching surface at the same time.

〔Effect of the invention〕

As mentioned above, the copying model modeling method of the present invention uses a foamed polystyrene frame whose surface has been previously numerically controlled to form a wrinkled surface, and is used by assembling it into a master model. The setup at the time of modeling is simplified, and the number of man-hours is reduced, which improves the stripability. Furthermore, the preparation of the master model and the processing of the foamed polystyrene frame can be done in parallel, reducing lead time.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the copy model manufacturing method of the present invention, FIG. 1(a) is a perspective view showing the process of forming a wrinkled surface on the surface of the frame, and FIG. A sectional view showing the state in which the body is assembled to the master model, Figure 1 (C) is Figure 1 (I)
) is a cross-sectional view showing a copying model manufactured using a mold surface formed by the above process, FIG. 2 shows an example of a conventional copying model manufacturing method, and FIG. Figure 2(e) is a cross-sectional view showing the process of roughly shaping the wrinkled surface by applying a finish to the enclosure using a wooden frame and clay.
FIG. 6 is a cross-sectional view showing a process of numerically controlling the wrinkled surface of the rough copying model manufactured using the mold surface formed in FIG. 3(d). In the figure, 1... Frame made of expanded polystyrene 2-... Numerical control processing equipment [5... Wrinkle elongation surface 4... Master model 5, 6... Jacket 7... Product part mold surface 8
... Gap 9 ... Copy model 10 ... Metal frame 11 ... Steel pipe support 12 ... Wooden frame 13
...Clay patent applicant Toyota Motor Corporation (and 1 other person) Fang 1 figure U 1... No. Hif Seboris dimension drive frame I tree 2... & signal control D engineering depth 4... master model

Claims (1)

[Claims] The surface of the foamed polystyrene frame is numerically controlled to form a wrinkled surface, the frame is assembled to a master model, and the mold surface of the product part of the master model and the wrinkled surface of the frame are formed. A method for modeling a copying model, which is characterized by injecting a molding agent onto the combined mold surface and solidifying it after the molds are connected together.