JPH07195379A - Extrusion device of resin mold - Google Patents

Abstract

PURPOSE:To easily attach and detach an extrusion pin only by the work on the internal side of a mold. CONSTITUTION:A laterally protruding engaging part 20e is provided to one end of an extrusion pin 20 having an extrusion part 20a going in and out with respect to the recessed part 1b of a mold 1 so as to close and open the same provided to the other end thereof. A connection member 5 is fixed to the operation means 3 operating the extrusion pin 20. A holding hole 5d having the shape corresponding to that of the engaging part 20e and permitting the insertion of the engaging part and an engaging recessed part 5e having a shape permitting the engaging part 20e to revolve are provided to the opposed part the extrusion pin 20 of the connection member 5. By displacing the engaging part 20e with respect to the holding hole 5d by revolving the same in the engaging recessed part 5e, the detachment of the engaging part 20e from the holding hole 5d is prevented by the engaging recessed part 5e and the other end part of the extrusion pin 20 and the connection member 5 are connected in a freely disengageable manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for extruding a resin mold which is opened by a mold and then extruded by an extruding pin to take out a resin molded product or a residual resin piece adhering to the mold. .

[0002]

2. Description of the Related Art Conventionally, for example, in a thermosetting resin (ginclopentadiene) resin molding machine, a plurality of sets of molding dies and a pair of resin supply dies have respective mating surfaces. Then, the mold is closed, and the resin material is injected into the cavity formed inside the set of molding dies through the injection passage formed inside the set of resin supply dies. After curing, the molds of each set are opened and the resin molded product is taken out.

By the way, at the time when the above-mentioned molds of each set are opened, a resin molded product is adhered to the molding mold and a residual resin piece is adhered to the resin supply mold. In order to remove the resin molded product and the remaining resin pieces from the mold,
An extrusion device as shown in FIG. 4 is provided. In this extrusion device, an insertion hole 1a on the outer surface side O and a recess 1b having an inverted frustoconical cross section on the inner surface side I are provided in a proper position in the mold 1 so as to communicate with each other. The push pin 2 connected to the piston rod 3a of the push cylinder 3 is inserted through the recess 1b.

In the above-mentioned extrusion device, the piston rod 3a of the cylinder 3 is sucked during molding, and the extrusion pin 2
The push-out portion 2a at the tip end of the push-in portion is recessed in the recess 1b so as to close it, and the push-out surface 2b at the tip end surface of the push-out portion 2a is held flush with the inner surface of the mold 1. Then, when the molding is completed and the mold is opened, the cylinder 3 is actuated and the push-out pin 2 is projected into the mold 1 as shown by an imaginary line, and the resin linear product (resin In the case of the supply die, the residual resin piece 4 is pushed by the extruding surface 2b of the extruding pin 2 and taken out from the die 1 so as to be peeled off.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Since the resin repeatedly appears and disappears inside the mold 1 filled with the resin, when used for a long period of time, the resin adheres to the peripheral surface of the extruded portion 2a and the recess 1b, which prevents smooth reciprocating motion, and The part 2a may not be able to be accurately fitted in the recess 1b. Therefore, the push-out pin 2 is regularly removed to perform maintenance and inspection. However, since the screw shaft portion 2c at the rear end of the push-out pin 2 is screwed onto the piston rod 3a of the cylinder 3, the push-out pin 2 is first removed at the outer side O of the mold 1 at the time of removal thereof. Screw shaft 2
c is removed from the piston rod 3a, and then the push-out pin 2 is pulled out to the inner side I of the mold 1, and the work at two locations of the outer side O and the inner side I of the mold 1 is performed. It costs. Moreover, various machines are generally installed around the mold 1, and when removing the screw shaft portion 2c on the outer side O, an unnatural posture in a very narrow space is required. Work is forced and workability is extremely poor.

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and its object is to mold a resin having a structure capable of easily attaching and detaching an extrusion pin only by an operation on the inner side of a mold. It is to provide a mold extrusion device.

[0007]

In view of the above, the apparatus for extruding a resin molding die according to a first aspect of the present invention is configured so that an extruding portion 20a that is recessed from the inner side of the die 1 so as to close the recess 1b on the inner surface of the die 1.
An extruding pin 20 having one end is slidably inserted into the mold 1 toward the outer side of the extruding pin 20.
The resin molding 4 or the residual resin piece adhering to the inner surface of the die 1 is extruded by the extruding portion 20a by moving the other end of the resin in the direction of the die 1 by the operating means 3 connected thereto. In the extruding device of the resin molding die to be taken out, the engaging portion 20 protruding laterally is provided at the other end of the extruding pin 20.
e is provided, the connecting member 5 is fixed to the actuating means 3, and a holding portion having a shape corresponding to the locking portion 20e and allowing insertion thereof is provided at a portion of the connecting member 5 facing the push-out pin 20. The hole 5d and the locking recess 5e having a shape in which the locking portion 20e is rotatable are continuously provided, and the other end of the push-out pin 20 and the connecting member 5 and the locking portion 20e are connected to each other. By being rotated in the locking recess 5e, it is displaced with respect to the holding hole 5d, and in this state the withdrawal of the locking portion 20e from the holding hole 5d is blocked by the locking recess 5e. ,
It is connected to engage and disengage freely.

According to another aspect of the present invention, there is provided a resin molding die extruding device, wherein an engaging groove 20f is formed in an end surface of the engaging portion 20e, and a ball elastically biased provides a portion of the engaging portion. The engaging portion 20e is held in the recess 5e so as to be retractable so that the engaging portion 20e is engaged with the engaging groove 20f when the engaging portion 20e is rotationally displaced at a predetermined angle with respect to the holding hole 5d. ing.

[0009]

In the resin molding die extruding device according to the first aspect, the extruding pin 20 is connected to the actuating means 3 through the connecting member 5. And the connection of the push-out pin 20 to the connecting member 5 is
Holding hole 5 of connecting member 5 of engaging portion 20e of push-out pin 20
After being inserted into d and inserted into the locking recess 5e, the push pin 20 is rotated, whereby the locking portion 20e is displaced with respect to the holding hole 5d and is prevented from coming off in the locking recess 5e. Done. On the other hand, when the push-out pin 20 is detached from the connecting member 5, the push-out pin 20 is rotated so that the locking portion 20e corresponds to the holding hole 5d of the connecting member 5, so that the locking recessed portion 5e locks the locking portion. Since the lock of 20e is released, the push-out pin 20 can be pulled out as it is. That is, since the push-out pin 20 can be connected to and disconnected from the connecting member 5 only by rotating the push-out pin 20, the push-out pin 20 can be detached and attached only by the work on the inner side of the mold 1.

According to the second aspect of the present invention, there is provided a resin molding die extruding device,
When the push-out pin 20 is rotated to bring the engaging portion 20e into a predetermined angle with respect to the holding hole 5d, for example, in an orthogonal state, the elastically biased ball 6 engages the engaging groove 20f of the engaging portion 20e.
Get involved in. Therefore, it is possible to reliably prevent the locking portion 20e from being rotated and the push pin 20 from rotating and being unlocked due to, for example, vibrations, and the locking portion 20e by the ball 6 is locked in the locking recess 5e. Pressed down,
The push pin 20 and the connecting member 5 maintain the connected state without rattling.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the resin molding die extruding apparatus of the present invention will be described in detail with reference to the drawings. FIG. 1A is a partially cut side view of one embodiment of the present invention, and FIG. 1B is a sectional view taken along the line AA of FIG.

In FIG. 1, the push-out pin 20 is provided with a push-out portion 20a having the same shape as a conventional push-out pin at the tip of a cylindrical pin body 20c.
At the rear end, instead of the conventional screw shaft, the pin body 20
A small-diameter insertion shaft portion 20d is concentrically projected with respect to c, and a locking portion 20e projecting in both directions from the end portion of the insertion shaft portion 20d is integrally formed. The locking portion 20e is
The length in the longitudinal direction is set to be substantially the same as the diameter of the pin body 20c, and both end faces in the longitudinal direction are curved as shown by the broken line in FIG. , Figure 1
As shown by the broken line, an engaging groove 20f is provided along the longitudinal direction.

The push-out pin 20 is connected to the piston rod 3a of the push-out cylinder 3 via a connecting member 5. The connecting member 5 is a rectangular parallelepiped main body 5
It is connected to the piston rod 3a of the cylinder 3 via a screw shaft portion 5d integrally provided on one surface of a. Further, as shown in FIG. 3A, the insertion guide hole 5c, the holding hole 5d and the locking recess 5 are formed on the surface opposite to the one surface of the main body portion 5a.
e are sequentially formed in a communicating state.

The insertion guide hole 5c is an elongated hole having an opening area sufficiently larger than that of the engaging portion 20e as shown in FIG. 2B, and is gradually reduced as shown in FIG. The width in the widthwise direction is slightly larger than the diameter of the insertion shaft portion 20d. The holding hole 5d has a long hole shape corresponding to the locking portion 20e of the push-out pin 20 as shown in FIG. 3B, and the width d in the lateral direction thereof is slightly smaller than the diameter of the insertion shaft portion 20d. It is getting bigger. The locking recess 5e is formed in a circular shape whose diameter is the length of the holding hole 5d in the longitudinal direction. Therefore, the locking portion 20e having a length slightly shorter than this diameter is rotatable inside. It has become.

Storage recesses 5f are formed at both sides of the locking recess 5e, with their openings communicating with the locking recess 5e. A ball 6 having a diameter that can be fitted into the engaging groove 20f of the push-out pin 20 is provided in each of the storage recesses 5g.
Is stored in a state of being biased by the coil spring 7 toward the locking recess 5e. The opening diameter of the storage recess 5g is formed to be slightly smaller than the diameter of the ball 6, and holds the ball 6 against the urging force of the coil spring 7 so as not to completely pop out. Part of the storage recess 5g faces the locking recess 5e, and the locking part 2
It is in contact with the end surface of 0e.

FIG. 1 shows a use state in which the push-out pin 20 is connected. At this time, as shown in FIG. 7B, the locking portion 20e is positioned orthogonal to the holding hole 5d, and the locking portion 20 abuts the upper surface of the locking recess 5e so that the holding hole 5d is removed from the holding hole 5d. The push-out pin 20 is connected to the connecting member 5 so as not to come off. Also, the locking portion 20
The balls 6 are fitted into both end portions of the engaging groove 20f of e, and the locking portion 20e is prevented from rotating. Therefore, it is possible to reliably prevent the push-out pin 20 from rotating due to vibration or the like to enter the unlocked state described later. Further, since the locking portion 20e is pressed against the upper surface of the locking recess 5e via the ball 6 by the biasing force of the coil spring 7, the push-out pin 20 is connected to the connecting member 5 without rattling. When the pushing cylinder 3 operates in this state, the pushing pin 20 is pushed through the connecting member 5 in the direction of the mold 1 as shown by the phantom line in FIG. The molded product 4 is extruded so as to be separated from the mold 1.

Next, when the push-out pin 20 is removed for maintenance and inspection, first, as shown in FIG. 2 (a), the cylinder 3 is operated to cause the push-out portion 20a of the push-out pin 20 to project into the mold 1. Then, on the inner side of the mold 1, a pushing operation is performed by the pushing section 20a to turn the pushing pin 20 by 90 ° in either direction from the state of FIG. Figure 2 (a)
Shows a partially cut-away side view of the 90 ° rotated state, and FIG. 11B is a sectional view taken along line BB of FIG. At this time, as shown in (b) of the figure, the locking portion 20e of the push-out pin 20 faces the holding hole 5d of the connecting member 5 in an insertable state. When the push-out pin 20 is pulled inward of the mold 1 after the state shown in FIG. 2, as shown in FIG. 3, after the locking portion 20e has passed through the holding hole 5d of the connecting member 5, its longitudinal Since the length in the direction is set to be substantially the same as the diameter of the pin body 20c, the push-out pin 20 can be pulled out to the inner side of the mold 1 even though it can be inserted through the insertion hole 1a of the mold 1 without any trouble.

After the maintenance and inspection, the push-out pin 2
When mounting 0, the push-out pin 20 is engaged with the engaging portion 20e on the inner side of the mold 1 in the reverse order of the above-mentioned taking-out procedure.
From the side into the recess 1b and the insertion hole 1a of the mold 1,
The locking portion 20e is inserted through the insertion guide hole 5c and the holding hole 5d of the connecting member 5 and inserted into the locking recess 5e. Since this insertion work is performed on the inner side of the mold 1, the connecting member 5 side cannot be seen from the work place, but the locking portion 20e slides into the insertion guide hole 5c and is guided into the holding hole 5d, so there is no problem. Can be inserted. When the push-out pin 20 is rotated in this state, the end face of the locking portion 20e slightly pushes the ball 6 toward the storage recess 5f side against the biasing force of the coil spring 7, and the locking portion 20e locks. It goes into the cavity of the place 5e. When the push-out pin 20 is rotated 90 °, the use state shown in FIG. 1 is obtained. That is, the engaging groove 20f faces the ball 6, the ball 6 is engaged with the engaging groove 20f by the urging force of the coil spring 7, the push-out pin 20 is prevented from rotating, and the ball 6 is urged by the urging force of the coil spring 7. The locking portion 20e is pressed against the upper surface of the locking recess 5e via 6 and the push-out pin 20 is held without rattling.

[0019]

In the resin molding die extruding device according to the first aspect of the present invention, the extruding pin can be connected to and disconnected from the connecting member fixed to the actuating means only by rotating the extruding pin by a certain angle. Therefore, at the time of maintenance and inspection, the push-out pin can be detached and attached only by the work on the inner side of the mold, so that the workability is remarkably improved.

According to another aspect of the present invention, there is provided a resin molding die extruding apparatus, wherein when the extruding pin is rotated, the elastically urged ball is engaged with the engaging groove of the engaging portion of the extruding pin to extrude the extruding pin. Since the pin is prevented from rotating, it is possible to reliably prevent the lock from being accidentally disengaged due to the rotation of the push pin due to vibrations, etc. The connected state can be maintained without rattling with respect to the connecting member.

[Brief description of drawings]

FIG. 1A is a partially cut side view showing a usage state of an embodiment of the present invention, and FIG. 1B is a sectional view taken along line AA of FIG.

FIG. 2A is a partially cut side view showing a state in which an extrusion pin is rotated by 90 ° from the above state, and FIG. 2B is a sectional view taken along line BB of FIG.

FIG. 3 is a partially cut side view showing a state in which the push-out pin is pulled out from the connecting member from the above state.

FIG. 4 is a side view in which a conventional device is partially cut.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold 1b Mold recess 3 Extrusion hydraulic cylinder (operating means) 4 Resin molded product 5 Connecting member 5d Holding hole 5e Locking recess 6 Ball 20 Pushing pin 20a Pushing part 20e Locking part 20f Engaging groove

Claims (2)

[Claims] 1. An extruding pin (20) having an extruding portion (20a) at one end which is recessed from the inner side of the die (1) so as to close the recess (1b) on the inner surface of the die (1). Is slidably inserted to the outside of the mold (1), and the push pin (20) is connected to the other end of the push pin (20) by the operating means (3) to the mold (1). By moving the resin molding (4) or the remaining resin pieces adhering to the inner surface of the mold (1) at the extrusion part (20a) by moving in the direction of At the other end of the push-out pin (20), a locking portion (20
e) is provided, the connecting member (5) is fixed to the actuating means (3), and the portion of the connecting member (5) facing the push-out pin (20) corresponds to the locking portion (20e). A holding hole (5b) having a shape and allowing the insertion thereof and a locking recess (5e) having a rotatable shape of the locking portion (20e) are continuously provided, and the push pin (20) is provided. The other end and the connecting member (5) are displaced relative to the holding hole (5d) by the rotation of the locking portion (20e) in the locking recess (5e), The engaging portion (20e) is prevented from being pulled out from the holding hole (5d) by the engaging recess (5e), so that the engaging portion (20e) is detachably connected. Extrusion equipment. 2. A ball (6) having an engaging groove (20f) formed in an end surface of the engaging portion (20e) and elastically biased, has a part of the engaging recess (5e). ) In which the engaging portion (20e) is held so as to be retractable so that the engaging portion (20e) is engaged with the engaging groove (20f) when the engaging portion (20e) is rotationally displaced at a predetermined angle with respect to the holding hole (5d). The resin molding die extruding device according to claim 1, wherein