JPS63286241A - Method and device lost foam pattern - Google Patents

Abstract

PURPOSE:To make a production efficient by integrating each split model formed by dividing in plural pieces without releasing from a die by adhering each other by an adhesive inside the same lost foam pattern forming machine and after hardening it by forming in the necessary shape separating from the die. CONSTITUTION:The beads 11 of a foaming styrene are poured into die space parts 11a, 11b and the die is heated to make the beads foaming. After cooling the die each die 1a, 1b is separated and lost foam pattern 12a, 12b are integrated after coating an adhesive on adhesion faces 15a, 15b. The quality of a product can thus be improved and the production can be made efficient as well.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an investment mold casting method.Prior art: A prior art investment mold having a hollow part of a complex shape.

- For example, to manufacture the disappearing model 16 having the shape shown in Figure 3 of the attached drawings, as shown in Figure 4, the model is disassembled into a plurality of parts, and molds 10a and lobs are manufactured. Expanded polystyrene beads 11 are sealed in the molds 10a and 10b of each disassembled part, heated and molded to form a divided model 12a as shown in Figure 5. Similarly, model 1
A divided model 12b is formed corresponding to 2a. Next, as shown in Figure 6, the split models x2a and 12b are set in the adhesive jigs 13a and 13b, respectively, and the adhesive surfaces tsa and 1 are attached.
Apply adhesive to sb, move the adhesive jigs 13a and 13b in the direction of arrow B, and glue them together to form a single unit. Then, as shown in the off-line diagram, separate the adhesive jigs 13a and 13b from 1 to 5. We are producing the desired disappearing model. Note that 14a and 1.4b are the engagement projections and matching holes of the adhesive jigs 13a and 13b, respectively.

Problems to be Solved by the Invention Conventional adhesive vanishing model molding, as described above, involves the process from molding a plurality of models to producing an integrated vanishing model product by adhesion. The model is released from the mold, placed on an adhesive jig, and bonded with an adhesive or the like. Because the glued and integrated model goes through a process of being taken out from the gluing jig, each process may cause distortion in the shape of the multiple models or cause scratches on the model surface when taking out or installing the multiple models. The process is complicated. The vanishing model product integrated in this manner was non-uniform in one dimension and shape, and was unstable in quality.

The purpose of this invention is to solve the above problems and develop a method and apparatus that can efficiently produce vanishing models with stable quality.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention aims to solve the problems described above.
A mold in which a vanishing model of the same size is divided into several parts is installed in the same vanishing model and formed at the same time, and each divided model is molded without separating it from each Venus in the molding machine. A vanishing model in which an adhesive is applied to the joints, they are glued together while sealed in a mold, and after the adhesive has hardened, they are separated from the mold to obtain the desired vanishing model. This is a molding method.

Furthermore, as a device for carrying out the above molding method, there is an intermediate base located in the center of the device and with gold M attached to both the left and right sides, and ■ a mold corresponding to the left and right sides of the vaginal intermediate base, which A mold and a mold mounting base that are movable in the axial direction; ■ Disappearance model molding in which the intermediate base of ■ above is movable in a direction perpendicular to the moving direction of the mold and the mold mounting base of ■. It is a device.

Function This invention is to divide a disappearing model of a desired shape and size into multiple parts and mold them simultaneously using the same molding machine as described above, and then move the left and right gold M with the molded divided models attached. After separation, the intermediate base is moved and separated in a direction perpendicular to the moving direction of the left and right molds.

Next, adhesive is applied to the joint surfaces of the remaining divided disappearing models molded in the left and right molds, and then moved and joined to integrate the multiple disappearing models. be done.

After the adhesive has hardened, the left and right molds are moved and separated to take out the disappearing model molded into the desired shape and size.

Embodiment Embodiment f of this invention will be explained with reference to the accompanying drawings. As shown in Figures 1 and 2, the main parts of this device are as follows:
Mold 1a is located in the center and on both left and right sides.

Intermediate base 1 to which lbt is attached, and molds 2a and 2b that are fitted into molds 1a and lb, and that are movable by adjusting the central axis direction to the guide shell 6 by operating the moving cylinder 3.
A mold mounting base 2 is provided, and an intermediate base 1 is provided.
The molds 1a and lb are configured to be movable in a direction perpendicular to the moving direction of the firefly-shaped mounting base 2 and the fireflies m2a and 2b by operating the moving cylinder 4.

When molding a Styrofoam vanishing model having the shape shown in Fig. 113, for example, a mold 9a having the shape shown in Figs. 8 to 11 is used.
, 9b and the molds 1a and 1b were manufactured, and as shown in Figure 1, the mold mounting bases 2a were respectively installed.

2b, attached to the left and right sides of the intermediate base 1.

Next, operate the moving cylinder 4 provided on the cylinder mounting plate 7a of the intermediate base 1, and remove the intermediate base 1 and the mold]
, a, lb are moved along the parallel guide bar 8 toward the guide bar support plate 7b in the direction of force #, and the molds 2a, 2b K are moved directly under the parallel guide bar 6 to the corresponding spear 2 in the figure. After stopping the cylinder at the position, the cylinder mounting plates 5a, 5
Activate the moving cylinders 3a and 3b pivoted to b, and move the left and right mold mounting bases 2a and 2b connected to the cylinders to
, along the guide rail 6 in the direction of the intermediate base 1
The molds 9a and 9b attached to the mold mounting bases 2a and 2b are placed on the metal molds ula and lb, respectively, and a space 11a is formed as shown in FIG.

Completely form the mold inside ub+.

Next, as shown in FIG. After cooling, the integrated molds are separated from each other as shown in Fig. 9, and returned to the state shown in Fig. 111.

That is, in the state shown in Figure 1 and Figure 8, after each mold has cooled down, the left and right moving cylinders 3a and 3b are operated, and the mold mounting bases 2a and 2b and the &W9a fixed thereto,
9b are mutually moved in the direction of arrow B2 and separated from the intermediate base molds 1a and 1b, the moving cylinder 4 of the intermediate base 1 is actuated, and the intermediate base 1 and the gold, tii ! [By moving 1a and lb, the state returns to the state shown in Figure 1.

Next, as shown in Figures 9 to 1Tl1, gold! 9a.

The adhesive surfaces 15a of the left and right divided models 12a and 12b that are molded separately into em9b and remain in em9a and em9b.

15bK adhesive is applied, and the moving cylinders aa and ab are operated in the direction of arrow B again in the same manner as above to form the molds 9a and 9a.
Disappearance model 12 that is molded in one piece when only 9b is joined
a and 12b are integrated.

After the adhesive has hardened, move the cylinders 3a and 3b.
After operating in the direction of arrow B, the integrated target disappearing model t--release and take out.

This example describes a method and apparatus for dividing and molding a simple left-right symmetrical model into two parts, left and right, but even a more complex model that is molded by dividing into multiple parts can be manufactured according to this example. Needless to say, it is.

Effects of the Invention The present invention, as described above, divides a vanishing model into a plurality of parts and forms them simultaneously in a vanishing model molding machine that can be freely divided and combined, and each molded divided model is removed from the mold of the molding machine. Without releasing the molds, the joints of each split model are bonded and integrated with adhesive, molded into the desired shape, and cured, after which these molds are separated to obtain a vanishing model with the desired size and shape. This device includes a movable intermediate base and mold having the above-mentioned functions, a divided mold and a mold mounting base that can be moved in the left and right directions according to the intermediate base. Because we have set up.

This allows the split model to be molded as before.

The process of removing the mold from the mold is no longer necessary, and there is no distortion in the size and shape of the model when taking out multiple models that have been molded separately or when gluing them together to integrate them.
Not only can quality be stabilized, but production efficiency can be improved by eliminating the need for a process of releasing the mold from the mold associated with adhesion and jigs for adhesion.

[Brief explanation of the drawing]

Figure 1.1 shows one embodiment of the present invention, and Figure 2 is a perspective view of the main parts of the device in a state in which each mold is moved and separated after molding a plurality of disappearing models, and Figure 2 is a perspective view of the main part of the device in a state where each mold is moved and separated after molding a plurality of disappearing models. A perspective view of the main parts of the device in a heated molding state with the model material fitted into the enclosure channel;
Figure 3 is a perspective view of the completed vanishing model and M product of this example. Fig. 4 is a vertical cross-sectional view of the molded parts of each partial model according to the conventional technique. Fig. 5 is a longitudinal cross-sectional view of the molded product shown in Fig. A vertical cross-sectional view of the split model housed in the adhesive jig for gluing and integrating multiple vanishing models. Figures 2 and 8 are vertical cross-sectional views of the main parts of the mold when the device is in the state shown in Figure 2, and Figures 1 and 9 are longitudinal sectional views of the mold when it is in the state shown in Figure 1. Vertical cross-sectional view of the main part of the mold. Figure 10 is a vertical cross-sectional view of the main parts of each vanishing model M enclosed in the mold, with adhesive applied to the adhesive surface and the molds joined to integrate the vanishing models, Figure 11. 2 is a longitudinal cross-sectional view of the vanishing model after the integration of the vanishing model is completed, the molds are moved and separated, and the finished vanishing model is taken out. 1... Intermediate base 2... Mold mounting base

Claims (1)

[Scope of Claims] 1. A vanishing model is divided into a plurality of parts and simultaneously molded in the same vanishing model molding machine, and each divided model is molded without releasing the molded divisional model from the mold of the molding machine. A method for molding a vanishing model, which comprises adhering and integrating the joints of the two parts with an adhesive, molding and curing them into a desired shape, and then separating them from the mold. 2 Intermediate base with molds attached on both left and right sides. The molds and molds have molds and mold mounting bases that correspond to the left and right molds of the intermediate base and are mutually movable in the direction of the same central axis, and that the intermediate base is movable left and right. A vanishing model forming device characterized in that it is disposed so as to be movable in a direction perpendicular to the moving direction of a mounting base.