JPH0136577Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a mold for plastic molding that allows a slide core to operate smoothly.

[Conventional technology and its problems]

Conventionally, the mechanism shown in FIG. 5 is known as an operating mechanism for a slide core in this type of mold.

That is, in the figure, 106 is a slide core constituting the female die 2, 7 is an inclined operating pin insertion hole formed from the outer edge of the slide core 106, and 8 is a hole extending outward from the inner surface of the slide core 106. A compression spring mounting hole 9 is formed horizontally toward the mounting hole 8, and a compression spring 9 is mounted in the mounting hole 8 via a mounting pin 10.
06 is always urged outward. Reference numeral 16 denotes a buff holder constituting the male die 13, which is disposed on the female die 2 so as to be freely raised and lowered; 17 is an operating pin attached obliquely downward to the lower surface of the buff holder 16; It can be inserted into and removed from the hole 7.

In the conventional product configured as described above, the male mold 13 is lowered and the buff presser 16 is moved to the slide core 10.
6, insert the operating pin 17 into the insertion hole 7, and press the slide core 10 against the compression spring 9.
6 is properly pressed inward to move it. Then, a predetermined cavity is formed between the male mold 13 and the female mold 2, and molding is performed. When the required molding is completed, the male mold 13 is raised, the operating pin 17 is removed from the insertion hole 7, and the slide core 106 is gradually returned to its original state together with the elasticity of the compression spring 9.

While the slide core 106 is in operation, it can be properly slid by the action of the compression spring 9;
Therefore, during the initial operation of the slide core 106, the compression spring 9
The repulsive force of the slide core 106 is extremely weak, and the initial movement of the slide core 106 cannot be made smoothly.

This invention aims to provide a mold for molding plastics, etc., which solves all of the conventional problems at once and allows the slide core to operate extremely smoothly from the initial movement.

[Means for solving problems]

That is, in this invention, a compression spring 9 is attached to the slide core 6 via an elastic member 11 having high resilience.

[Function] During the initial operation of the slide core 6, the elastic member 11
is repulsed sharply, and the initial operation of the slide core 6 can be performed extremely smoothly.

〔Example〕

An embodiment of this invention shown in the drawings will be described below.

1 is a base, 2 is a female mold disposed on the base 1, and the female mold 2 includes a bottom core bush 3, a side core bush 4, a core bush outer frame 5,
It is composed of a slide core 6. 7 is an inclined operating pin insertion hole formed from the outer edge of the slide core 6; 8 is the slide core 6;
A compression spring mounting hole 9 is formed horizontally outward from the inner surface of the mounting pin 1 in the mounting hole 8.
A compression spring 11 is installed between the mounting pin 10 and the bottom wall of the mounting hole 8. The elastic member 11 is made of a urethane resin material with high repulsive force or a disc spring. etc. are suitable. 12 is a mold base disposed on the female mold 2 such that it can be raised and lowered; 13 is a male mold attached below the mold base 12;
, a side cabinet bush 15 , and a buff holder 16 which can be fitted into the slide core 6 . Reference numeral 17 denotes an operating pin that is attached diagonally downward to the lower surface of the buff holder 16, and the operating pin 17 can be freely inserted into and removed from the insertion hole 7. In addition, A indicates the required cavity.

The mold configured as described above allows the operating pin 17 to be fitted while the buff presser 16 is fitted onto the slide core 6.
is inserted into the insertion hole 7, and the slide core 6 is appropriately pressed and moved inward against the compression spring 9.
At this time, the elastic member 11 sharply rebounds at the same time as the actuation pin 17 is inserted, and the initial movement of the slide core 6 is performed smoothly, and the subsequent movement is performed appropriately by the action of the compression spring 9. Then, a predetermined cavity A is formed between the male mold 2 and the female mold 13, and molding is performed. When the molding is completed, the male die 13 is raised, the actuation pin 17 is removed from the insertion hole 7, and the slide core 6 is released together with the elasticity of the elastic member 11 and the compression spring 9.
gradually return to its original state.

Thereafter, the machine is operated in the same manner to perform the molding work in sequence.

[Effect of idea]

According to this invention, as described above, the compression spring 9 is attached to the slide core 6 via the elastic member 11 with high repulsive force, so that the slide core 6
During the initial operation, the elastic member 11 sharply rebounds, allowing the slide core 6 to make an extremely smooth initial movement, and the subsequent movement can be performed by the compression spring 9. It can operate extremely smoothly.

[Brief explanation of drawings]

Figures 1 to 4 show one embodiment of this invention; Figures 1 and 2 are enlarged sectional views of essential parts showing the operating state; Figure 3 is a partially cutaway front view;
FIG. 4 is a plan view showing a part of the female mold 2, and FIG. 5 is an enlarged sectional view of the main part showing a conventional example. 2... Female mold, 6... Slide core, 7... Insertion hole, 9... Compression spring, 11... Elastic member, 13
...male type, 17...operating pin, A...cavity.

Claims (1)

[Scope of utility model registration request] A metal mold consisting of a female mold 2 having a slide core 6 that is always urged outward by a compression spring 9, and a male mold 13 having an operating pin 17 that can be inserted into and removed from an insertion hole 7 formed in the slide core 6. In the mold,
A mold for plastic molding characterized in that the compression spring 9 is attached to the slide core 6 via an elastic member 11 having high resilience.