JPS641053Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a slide core with a gate.

Depending on the shape of the molded product, a sprue and a gate may be provided on the slide core. For example, in Fig. 1, a molded product is formed by a slide core 1, a fixed side mold plate 2, and a movable side mold plate 3. A sprue 4 and a gate 5 beyond the sprue are formed on the slide core 1. The gate 5 is formed on the slide core 1 in this way because, in Fig. 1,
If it were provided on the fixed side mold plate 2, the mold plate would be thick and the sprue would have to be formed long.

When the gate 5 is provided in the position shown in the first figure, a portion called a gate remainder 6 remains in the gate after molding as shown in the second figure, and when the slide core 1 is moved, this remains. The remaining gate 6 is scraped off from the molded product 7 by the gate and falls (third
figure).

If this remaining gate 6 is left as it is, it will get in the way during the next molding process, so it has to be removed each time, which is time-consuming.

This invention is intended to solve these drawbacks in the conventional example.

In FIG. 4, a slide core 9 and a stationary mold plate 10 are attached to the stationary support plate 8. The support plate 8 is provided with an angikola pin 11, which is inserted into the slide core 9 so as to be able to move forward and backward, and when the support plate is raised, the slide core opens laterally on the movable template 15. A sprue 12 and a gate 13 are formed on the slide core 9, and a molding surface 14 through which the gate opens has an opening angle θ with respect to the moving direction of the slide core. If this angle θ is too large, the angle with the gate 13 will adversely affect molding. Although it depends on the molding material, for example, if the opening diameter of the gate 13 is about 0.7 mm, θ may be about 3° to 5°. In FIGS. 5 and 6, when the mold is opened after molding, the remaining gate 17 that remains attached to the molded product 16 has an opening angle θ, so
It remains attached to the molded product without being scraped off by the gate. That is, the remaining gate 17 can be removed without falling into the mold and still attached to the molded product 16.

According to the gated slide core of the present invention having the above-described structure, it is possible to prevent the remaining portion of the gate from being scraped off, and it is possible to improve the efficiency of the molding operation.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the conventional example, Figure 2 is a cross-sectional view of the main parts of the conventional example shown in Figure 1 showing the state after molding, and Figure 3 is the main part showing the mold opening state of the conventional example shown in Figure 1. FIG. 4 is a cross-sectional view of the embodiment of the present invention, and FIG.
This figure is a cross-sectional view of the main part showing the state after molding of the embodiment shown in FIG. 4, and FIG. 6 is a cross-sectional view of the main part showing the state of the embodiment shown in FIG. 4 when the mold is opened. 9...Slide core, 13...Gate, 14...
...molding surface where the gate opens, θ...opening angle.

Claims (1)

[Scope of utility model registration request] A slide core with a gate, characterized in that the slide core is provided with a gate for injection molding, and the molding surface where the gate opens is angled at an opening angle with respect to the moving direction of the slide core.