JPS6092819A - Molding device - Google Patents

Abstract

PURPOSE:To process undercuts with recess by a method wherein a plurality of slide cores are employed. CONSTITUTION:Simultaneously with the start of mold opening after the molding, a slide block 12 is slided in the direction indicated with the arrow X by means of a cylinder 19 in order to draw a slide core 11 out of a recess 10. When a fixing pin 14 comes out of a hole 15, a stop bolt 17 completely slides a sliding groove 18 and abuts against a slide core 13, resulting in sliding the core 13 in the direction indicated with the arrow X. The slide core 13 pulls an undercut 9 in the direction indicated with the arrow X so as to pull a molded part 8 out of a core main body 7 in order to eject the molded part 8.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a mold device for releasing a molded product having a recess that requires mold release in two or more directions opposite to the opening and closing of the mold. be.

Conventional configuration and its problems The conventional mold device has a specific configuration as shown in Fig. 1.
The undercut part 4 is pulled in the direction of arrow
direction). However, if the undercut part has a depression that requires release in a direction different from the mold opening/closing direction as shown in Figure 2, the core and pins that form this depression will get in the way and the undercut part will be stretched and molded. It was not possible to release the product by bending it.

OBJECTS OF THE INVENTION The present invention is for treating undercuts having the above-mentioned depressions.

Structure of the Invention The present invention has a slide core that releases the recess in one direction at the same time as the opening of the mold starts, and a slide core that slides at a timely delay after the slide core slides to release the molded product in the other direction. It consists of a slide core that can be released from the mold by bending it, and a mechanism that operates these.

DESCRIPTION OF EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. 3 to 6. In the figure, 6 is the cavity, 7 is the core body, 8 is the molded product, 9 is the undercut part of the molded product 8, 1o
11 is a depression provided in the undercut portion 9, and 11 is a depression 1.
12 is a slide block provided with a groove on which the slide core 11 slides; 131fi is a slide block 8 that slides at an appropriate time after the sliding of the slide core 11 and stretches the undercut portion 9 in the direction of the arrow X; 14 is a fixing pin that fixes the position of the slide core 13 during molding and also fixes the slide core 13 during initial sliding of the slide core 11; 16 is a fixing bin 14;
hole for receiving, 16 is spring, 17 is slide core 1
1 and 13 are stop bolts fixed to the slide block 12 to determine the timing of sliding; 18 is a sliding groove for the stop bolt 17 provided in the slide core 13;
19 is a cylinder that operates the slide block 12.

Simultaneously with the start of mold opening after molding, the cylinder 19 slides the system slide block 12 in the direction of the arrow X. The slide core 11 slides in a groove provided at an appropriate angle in the slide block 12 in the direction of arrow Z, and comes out of the recess 10. Next, the fixed bottle inserted into the hole 15 to prevent the slide core 13 from sliding is removed by opening the mold. Next, the stop bolt 17 fixed to the slide block 12 finishes sliding in the slide groove 18, and the slide core 13
It also starts sliding in the direction of arrow X. The slide core 13 is pulled out of the core body 7 by pulling the undercut portion 9 in the direction of the arrow X, bending the molded product 8. after that,
The slide block 12 is stopped by the cylinder, and the molded product 8 is projected in the direction of arrow Y.

Next, a second embodiment of the present invention will be described based on FIGS. 7 to 10. In the figure, 2o is a cavity, 21 is a core body, 22 is a molded product, 23 is an undercut part of the molded product 22, 24 is a recess provided in the undercut part 23,
25 is a slide core that forms the recess 24; 26 is a slide core that slides with a timely delay to the sliding of the slide core 26 and stretches the undercut portion 23 in the direction of the arrow X to bend the molded product 22; 27 is a slide core 26 28 is a hole for receiving the fixing bottle 2, and 29 is a hole provided in the slide core 26 for fixing the slide core 26 during initial sliding of the slide core 25. sliding groove.

3o is a cylinder on which the slide core 26 slides.

After molding, the slide core 26 is slid in the direction of arrow X by the cylinder 30 at the same time as the mold opening starts, and the recess 24 provided in the undercut portion 23 is released from the mold. Next, the fixing pin 27 that fixed the sliding of the slide core 26 is removed from the hole 28 by opening the mold. Next, the slide core 25 hits the slide core 26 and the slide core 26 also starts sliding in the direction of the arrow X. The slide core 26 is made by stretching the undercut portion 23 in the direction of the arrow X and bending the molded product 22.
Pull it out from the core body 21. Thereafter, the cylinder stops the slide core 26, and the molded product 22 is projected in the direction of the arrow Y.

In the first and second embodiments, the slide core is operated by a cylinder, but it is also possible to use a finger bottle or the like.

Effects of the Invention As described above, the present invention uses a plurality of slide cores,
The recessed shape allows for zero mold release.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are cross-sectional views of the main parts of a mold showing conventional undercut processing, and Figures 2 (a) to (f).
3 is a sectional view of a product having an undercut with a complicated shape, FIG. 3 is a sectional view of a mold device according to an embodiment of the present invention, FIG. 4 is a sectional view of the mold device during molding, and FIG. The figure is a cross-sectional view of the same state where the slide block has slid and the bottle has come out of the undercut, Figure 6 is the same cross-sectional view showing the state where the slide core has further slid and the undercut has come out of the core body. Figure 7 is a sectional view of a mold in another embodiment, Figure 8 is the same sectional view during molding, Figure 9 is the same sectional view with the slide core sliding and released from the recess, and Figure 10.
The figure is the same cross-sectional view with another slide core also sliding and the undercut removed from the core body. 9.23...Undercut part, 10.24.
... hollow, 11, 13, 25, 26...
Slide core, 12...Slide block, 1
4・27・・・・Fixed bottle, 15・28・・・・
・Hole, 17・・・Stop bolt, 18・19・
...Sliding groove, 16. River... Spree 7/, 19.3
0...Cylinder. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure A 182 Figure (In<II) <Han' (,:) (Asu) (Figure 3 Figure 4 Figure 5 f 15 f'l f2 Figure 6 if f2 Figure 7 Figure 8 2324 Light 272'b Figure 9 Figure 10

Claims (1)

[Claims] In a mold device that molds a molded product that has a recess that requires mold release in two or more directions opposite to the opening and closing of the mold, a slide core that releases the recess in one direction at the same time as the mold opens, and this slide core. A slide core that allows mold release in the mold opening/closing direction by sliding in the same direction after a certain distance during the sliding process and deflecting the molded product in the other direction. A mold device with