JPS6116813A - Mold apparatus - Google Patents

Abstract

PURPOSE:To enable a precise and stable product to be supplied, by extending a core side, and allowing a side core to slide along the inner side of the core side. CONSTITUTION:When a cavity mold 6 is mated with a core mold 7, a side core 8 is moved in sideways. After the molds are mated, a resin material melted at a high temperature is cast, and it is cooled to obtain a product 9. Then the molds are opened in such a way that the cavity mold 6 is moved away from the product, and at the same time the side core 8 is slid sideways thereby leaving the product on the core mold 7. The left product is removed. As the electroformed mold 6a that is brittle will not abut on the side core 8, and abuts only on the core mold 7, it will not be broken and a product can be provided stably.

Description

[Detailed description of the invention] Industrial applications This invention relates to a mold device equipped with a casting mold.

The structure of the conventional example and its problems will be explained below regarding the mold device that forms the operating knob of the slide volume. FIG. 1 is a perspective view showing the knob part of the slide volume, and FIG. 2 is a cross-sectional view thereof, where 1 is a lever connected to the sliding part of the slide volume, and 2 is a knob attached to the tip 1a of the lever 1. It is.

This knob 2-2 has a groove 21L at the rear of knob 2 to facilitate installation.
It is configured such that it can be attached simply by fitting it onto the tip end 1a of the lever 1. Further, the knob 2 is made of a resin molded body, and its surface portion 2b is formed with dowel knurling (a plurality of V grooves) to improve the aesthetic appearance of the design.

When molding the knob 2 as described above, conventionally, the third
A mold device as shown in the figure was considered.

This mold device includes a cavity mold 3 and an electroforming mold 3 that is essential for molds that form parts that play a major role in appearance.
a is embedded. Further, when the core mold 4 and the cavity mold 3 are docked, the side core 6 slides. However, with this structure, there is a problem that the side core 5 hits the end 3b of the electroforming mold 3a, which is weak in strength, and the end 3b of the electroforming mold 3 is chipped. Type structure was not possible.

OBJECT OF THE INVENTION 3 The present invention eliminates these drawbacks and provides a mold apparatus having an electroforming mold that can supply stable products with high precision.

Structure of the Invention The mold device of the present invention extends the core side so that the side core slides on the inside of the core side, thereby eliminating contact between the electroforming mold part and the side core, which is weak in strength, and preventing mold breakage. It is possible to completely eliminate the problem.

DESCRIPTION OF THE EMBODIMENTS FIG. 4 shows the mold of the present invention in a closed state, and FIG. 6 shows the mold in an open state.

An electroforming mold 6a, which is indispensable for giving a beautiful external finish to a product to be resin plated, is embedded in a cavity mold 6. Extension part 7 to core mold 7! This is a mold structure in which the L part is extended and the side core 8 slides inside the L part. 9 indicates the product.

To mold this product 9, when the cavity mold 6 and the core mold 7 are docked from the state shown in FIG.
comes in from the side. After the mold is dotted, a resin material melted at high temperature is poured into the mold and cooled to produce product 9. After that, the mold is opened, but at the same time as the cavity mold 6 is separated, the side core 8 also slides laterally, leaving the product in the core mold 7, which can be taken out.

With this method, the electroforming mold 6a, which is fragile in terms of strength, does not come into contact with the side core 8 and only has a surface contact with the core mold 7 side, so that the product can be stably produced without being damaged. can be provided.

Effects of the Invention The mold device of the present invention has a structure in which a mold having an electroforming mold slides on the inside of the core mold to prevent the side core and the electroforming mold from coming into contact with each other. This method is extremely advantageous in that it can theoretically eliminate mold breakage and provide stable products.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of page 6 showing the slide volume knob, Fig. 2 is a sectional view thereof, Fig. 3 is a sectional view of a conventional mold device, and Fig. 4 is an embodiment of the present invention. FIG. 6 is a cross-sectional view of the mold apparatus in the docked state, and FIG. 6 is a cross-sectional view of the mold apparatus in the separated state. 6...Cavity mold, 6a...Electroforming mold, 7...Core mold, 71L...Extended part of core mold, 8. ...Side core. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure b! Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A mold device comprising an electroforming mold, a core mold at a portion that abuts against the electroforming mold is extended, and a side core is configured to slide inside the core mold.