JP2001300942A - Mold for molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mold for molding in which a core 8 can be removed from an undercut 52 of a molding 51 molded by the core 8 without using an actuator even when the core 8 is not externally removed from the undercut 52 when a shape of the undercut 52 is not obliquely moved. SOLUTION: The mold 1 for molding releases the molding 51 having the undercut 52 by protruding operations of an ejector plate 10 and an ejector pin 11. The mold 1 comprises the core 8 for molding the undercut 52, a slide rail 12 provided at the plate 10, a slide base 13 moving along the rail 12, and a rod 14 for coupling the base 13 to the core 8. In this case, the rail 12 is obliquely provided to the plate 10. Thus, the core 8 is obliquely moved to be removed from the undercut 52 of the molding 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die according to a molding technique.

[0002]

2. Description of the Related Art As shown in FIG. 3, for example, a molded product 51 is provided with an undercut 52 which is difficult to release. If the shape of the undercut 52 does not move obliquely, this core 54 Is a shape which does not come off from the undercut 52, a molding die 53 shown in the figure is conventionally used, and this molding die 53 is used for moving the core 54 obliquely to release the undercut 52. , Mold opening (FIG. 4), oblique movement of the core 54 by the actuator 55 (also FIG. 4), and protrusion by the ejector pin 56 (FIG. 5).

However, the conventional mold 53 has the following problems.

That is, first, external power (such as hydraulic pressure or pneumatic pressure) is required to operate the actuator 55, and a sequencer, a sensor, a valve, and the like are required to control the operation of the actuator 55. Therefore, the configuration of the molding die 53 is complicated, and the setup of the molding die 53 is complicated.

[0005] Further, since the actuator 55 is operated after the mold opening is completed, the molding cycle is long by the operation of the actuator 55.

[0006]

SUMMARY OF THE INVENTION In view of the above, the present invention has been made in view of the above, and the shape of the undercut of a molded product formed by the core of the mold does not deviate from the undercut unless the core moves obliquely. The present invention provides a molding die that can remove the core from the undercut without using an actuator, thereby facilitating the configuration and setup of the molding die and shortening the molding cycle. The purpose is to: That is, an object of the present invention is to eliminate the oblique movement of the core by the actuator and to obliquely move the core by a mechanism inside the mold by the product ejection operation of the molding machine.

[0007]

In order to achieve the above object, the present invention provides a molding die for releasing a molded product having an undercut by ejecting an ejector plate and ejector pins. And a slide rail provided on the ejector plate, a slide base that moves along the slide rail, and a rod that connects the slide base and the core. The core is provided obliquely with respect to the ejector plate, whereby the core moves obliquely and comes off the undercut of the molded product.

In the molding die of the present invention having the above-described structure, when the mold opening is started, the slide base moves obliquely along the slide rail, and is connected to the slide base via the rod. Since the drawn core also moves obliquely, it becomes possible to remove the core from the undercut of the molded article without using an actuator.
The slant is a direction inclined at an angle greater than zero degree and smaller than a right angle with respect to the mold opening direction of the mold.

Further, the present invention includes the following technical ideas.

That is, according to the present invention, the undercut which cannot be released unless the core is moved obliquely is removed.
The present invention relates to a mold that uses only the movement of an ejector of an injection molding machine without using an actuator. In the embodiment, first, an inclined slide rail is installed on an ejector plate. The slide base is placed on this slide rail, and the slide base and the core are connected by a rod. At the time of product release, the slide base moves diagonally on the rail as the ejector plate advances. The core connected by the rod also moves diagonally sideways to remove the undercut. By arranging the slide rail obliquely, the core can be moved obliquely only by the protruding operation of the molding machine. Therefore, oblique movement of the core by the actuator can be eliminated. The molding die can be simplified, the cost of the die can be reduced, and the setup time can be reduced. The molding cycle time can be shortened.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a schematic cross section of a molding die 1 according to an embodiment of the present invention, and its operation state is shown in FIG.

The molding die 1 according to this embodiment is for injection-molding a molded product 51 having a sectional shape shown in the figure using a predetermined resin or the like as a molding material. The undercut 52 has a shape such that the core 8 does not come off the undercut 52 unless the core 8 forming the undercut 52 moves obliquely. The molding die 1 is configured as follows.

That is, first, the fixed side mounting plate 2
The fixed-side mounting plate 2 is provided with a fixed-side mold plate 3.
Are fixedly combined.

A movable mounting plate 4 is provided at the upper and lower ends of the drawing. A movable mold plate 7 is fixedly combined with the movable mounting plate 4 via a spacer block 5 and a receiving plate 6. The core 8 is assembled within the thickness of the movable mold plate 7 so as to be able to freely contact and separate.

Fixed-side template 3, movable-side template 7, and core 8
A product cavity 9 is formed by this, and a molded product 51 molded in the cavity 9 is released by the ejecting operation of a required number (two in the figure) of ejector pins 11 supported by the ejector plate 10.

A slide rail 12 is provided on the ejector plate 10 at an angle.
And a slide base 13 that slides obliquely along the longitudinal direction of the slide rail 12.
The slide base 13 and the core 8 are connected via a rod 14.

The rod 14 is arranged so that its central axis is perpendicular to the sliding direction of the slide base 13, and is slidable in a through hole 15 provided obliquely at an angle to the receiving plate 6. Is plugged in. The through hole 15 has an angular action. The slide base 13 is located at the upper end of the oblique slide stroke in the mold clamping state shown in FIG. The slanting direction of the slide rail 12 is as follows.
Are set so as to be most easily disengaged from the undercut 52.

Next, the operation of the molding die 1 having the above configuration will be described.

FIG. 1 shows a state in which the molding material filled in the cavity 9 of the molding die 1 has been solidified and the molding of the molded article 51 has been completed. From this state, the following operation is performed.

That is, as shown in FIG.
When the ejector plate 10 is relatively moved upward in the figure by the operation of a drive source (not shown) and the ejector pin 11 projects the molded product 51, the rod 14 is simultaneously slidably guided into the through hole 15 of the receiving plate 6. As a result, the slide base 13 slides diagonally along the slide rail 12 toward the lower left in the drawing, and accordingly, the core 8 connected to the slide base 13 via the rod 14 is also Move diagonally toward the lower left. Accordingly, the core 8 is automatically disengaged from the undercut 52 of the molded article 51 due to this movement, so that the core 8 can be formed without using an actuator as a drive source dedicated to core movement as in the above-described conventional technique. Article 51
Can be removed from the undercut 52. Therefore, the configuration and setup of the molding die 1 can be facilitated, the molding cycle can be shortened, and the like.

[0022]

The present invention has the following effects.

That is, in the molding die of the present invention having the above-described configuration, when the mold opening is started, the slide base moves obliquely along the slide rail, and accordingly, the slide base is moved via the rod. Since the core connected to the shaft also moves obliquely, it is possible to remove the core from the undercut of the molded article without using an actuator. Therefore, even if the shape of the undercut of the molded product formed by the core does not come off the undercut unless the core moves obliquely, remove the core from the undercut without using an actuator. Thus, the configuration and setup of the mold can be facilitated, and the molding cycle can be shortened.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a molding die according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part showing an operating state of the molding die.

FIG. 3 is a sectional view of a main part of a molding die according to a conventional example.

FIG. 4 is a sectional view of a main part showing an operating state of the molding die.

FIG. 5 is a sectional view of a main part showing an operating state of the mold.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold 2 Fixed side mounting plate 3 Fixed side type plate 4 Movable side mounting plate 5 Spacer block 6 Receiving plate 7 Movable side type plate 8 Core 9 Product cavity 10 Ejector plate 11 Ejector pin 12 Slide rail 13 Slide base 14 Rod 15 Penetration Hole 51 Molded product 52 Undercut

Claims (1)

[Claims] 1. A molding die (1) for releasing a molded product (51) having an undercut (52) by ejecting an ejector plate (10) and an ejector pin (11), wherein the undercut (52) is provided. A core (8) for molding
A slide rail (12) provided on the ejector plate (10), a slide base (13) moving along the slide rail (12), and connecting the slide base (13) and the core (8). Rod (1
4), wherein the slide rail (12) is provided obliquely with respect to the ejector plate (10), and accordingly, the core (8) moves obliquely and the molded product (51) is provided. ), Wherein the mold is separated from the undercut (52).