JPS63125318A - Insert mold - Google Patents

Abstract

PURPOSE:To improve the productivity of an insert molding machine, while simplifying its structure by achieving effectively and surely feeding, positioning and removing the insert work for injection molding part by means of the indexing rotation of an index table and the action of a guiding device. CONSTITUTION:The mold composed of a mold member 31, an index table 21 and a guiding plate 39 (guiding device), etc. is incorporated in a mold clamping device. Insert works 23 are supported by the index table 21 and are automatically fed into the injection molding part 58 of the mold member 31 by the indexing rotation of said table, and they are stopped and positioned there. Then, resin is injection-molded into the specified position of the insert works 23. After the injection molding, the insert works are taken out from the injection molding part 58 with the indexing rotation of the index table 21. Therefore, the special operating device such as a robot, etc. for handling the insert works 23 is unnecessary, and a setting space, etc. therefore are also unnecessary. The insert works may be surely supplied into and removed from the injection molding part 58 with a simple structure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an insert mold for injection molding resin into an insert work.

[Conventional technology]

BACKGROUND ART Recently, for example, injection molding of resin into a predetermined portion of an insert work made of metal is frequently performed.

FIG. 7 shows an example of an insert work that is insert-molded, and in this example, a resin fixing piece 15 is formed on the head 13 of the screw 11.

In this type of insert work, resin is injection molded into a resin fixing piece 15 using an insert molding machine, and as shown in FIG. is formed as.

Conventionally, when insert molding such products,
A simple robot or a special robot is used to insert an insert work into an injection mold.

[Problem that the invention seeks to solve]

However, inserting the insert work into the injection mold requires high positioning accuracy, which causes the problem that the structure and control of the robot become complicated and the equipment becomes large-scale.

[Purpose of the invention]

The present invention was made to solve the above-mentioned problems, and is capable of accurately feeding insert work into a mold.
The purpose is to provide an insert mold that can be efficiently manufactured.

[Means for solving problems]

The present invention provides an insert mold for injection molding a resin into an insert work, in which a plurality of support parts are formed at a certain angle from the center to support the insert work, and are indexable at the certain angle. an index table, and a mold member provided with an injection molding part that is disposed at an index stop position of the support part on one side of the index table and forms a cavity into which the insert work is inserted together with the index table; A guide disposed on the other side of the index table, which guides the insert work to the index stop position during indexing operation of the index table, and also discharges the molded product formed in the mold member to the outside of the index table. It has a device.

[Action of the invention]

In the present invention, the insert work supplied to the support part of the index table is guided by the guide device as the index table rotates, moves to the index stop position, and is clamped together with the index table at this position. The required part is inserted into the cavity of the mold member, and is combined with the resin injected into the mold member to form a molded product.

As the index table rotates, the molded product is guided by a guide device and automatically moved to a discharge position, and is discharged from the index table at this position. In this way, the insert work is efficiently supplied and discharged from the injection molding section by the operation of the index table and the guide device.

[Embodiments of the invention]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, details of the present invention will be described with reference to an embodiment shown in the drawings.

FIG. 1 shows an insert mold according to an embodiment of the present invention. In the figure, reference numeral 21 is a disc-shaped index table, and on its outer periphery, there is an index table at an angle of 90 degrees from the center. , four Vs supporting the insert work 23
A support portion 25 consisting of a letter-shaped notch is formed.

A mold member 31 consisting of an upper mold 27 and a lower mold 29 is arranged above one side of the index table 21. At the center of the lower surface of the lower mold 29 of this mold member 31, a second
As shown in the figure, together with the index table 21, there is a cavity 31a in which resin is molded into the insert work 23.
An injection molded part 58 is formed at a position above the indexing stop position of the support part 25. This injection molding part 58 is connected to a nozzle bush 41a formed in the side of the mold member 31 via a resin flow path 41b in the center of the lower mold 29 and a resin introduction path 41 provided at the interface between the upper and lower molds. It's communicating.

Further, on the nozzle bushing 41a side of the mold member 31, an injection nozzle 43 is brought into contact with the nozzle bushing 41a to inject resin into the resin introduction path 41 of the mold member 31 and supply it to the injection molding section 58. An injection device is located.

An insert work supply device 33 is disposed on the outer circumferential side of the index table 21, the end of which is set at a position slightly higher than the index table 21, and which supplies the insert work 23 to the support portion 25 of the index table 21. .

A guide plate (guiding device) is provided on the lower surface of the index table 21 and has a guide groove 37 for guiding the insert work 23 placed on the support portion 25 of the index table 21.
39 are integrally fixed and arranged on the fixed plate 47 via the spacer 45.

The guide groove 37 formed in the guide plate 39 is, for example, as shown in FIG.
It is formed in the radial direction opening at the outer peripheral part of the guide plate 39 at a position C on the side, and from the position C to a position A on the side of the injection molding section.
It is formed in an arc shape with a predetermined radius, and is formed in an inclined shape gradually toward the outer peripheral opening from position A on the injection molding part side to position B on the molded product discharge part side, and From position A to position B, the groove depth is gradually made shallower as shown in FIG. Therefore, the insert work 23 of the index table 21 is moved upward during this period.

At the center of the guide plate 39 and the fixed plate 47, a rotary shaft 49 is rotatably supported vertically via bearings 49a and 49b.

A pinion 53 is fitted to this rotating shaft 49 via a one-way clutch 51 so as to be able to rotate relative to the rotating shaft 49, and this pinion 53 is fixed to a fixed plate 47 as shown in FIG. The rack 55 is engaged with a rack 55 that is reciprocated by a hydraulic cylinder 59.

The rotating shaft 49 projects upward from the guide plate 39, and the index table 21 is fitted into this projecting portion, and is connected by a key 57 and a nut 49c. and,
The reciprocating motion of the hydraulic cylinder 59 causes the binion 53 to reciprocate, and the rotating shaft intermittently rotates in one direction via the one-way clutch 51. As a result, the index table 2
1 is indexed and rotated at an angle of 90 degrees on a guide plate 39.

An insert work holding device 35 is provided on the indexing stop position side of the support portion 25 .

This insert work holding device 35 consists of a cylinder 35b supported by a bracket 35a fixed to the side of the guide plate 39, and a triangular shape that is attached to the rond of this cylinder 35b and corresponds to the figure 7 groove of the support part 25. The supporting portion of the index table 21 is composed of a holding member 61 having a shape, and a plunger 63 that is movably fitted in the center of the holding member 61 in the axial direction and is elastically biased outward by a spring or the like. When the cylinder 35b is operated at the index stop position of 25, the holding member 61 is fitted into the V-shaped groove of the support part 25, and the index table 21 is
At the same time, the screw part 11 of the insert work 23 supported by the support part 25 is pressed against the support part 25.

FIG. 6 shows a mold clamping device for clamping the mold 31, index table 21, etc. In the figure, reference numeral 69 denotes a fixed side mold mounting plate that is appropriately fixed to a pedestal (not shown), and is spaced at regular intervals. Four tie bars 6 placed against each other
7 passes through the fixed side mold mounting plate 69 and is supported so as to be vertically movable.

A movable mold mounting plate 65 is fixed to the upper end of the tie bar 67 at a predetermined distance from the fixed mold mounting plate 69, and a repressure plate 70 is mounted to the lower end of the tie bar 67. Fixed side type mounting plate 6
A hydraulic cylinder 71 provided between the recompression plate 70.9 and the recompression plate 70. Movable side mold mounting plate 6 via tie bar 67
5 moves up and down.

The mold clamping device has the guide plate 39 on the fixed side mold mounting plate 69, and the index table 21 is placed on the guide plate 39.
A fixing plate 47 supporting the is fixed with bolts or the like. The upper mold 27 of the mold member 31 is fixed to the lower surface of the movable mold mounting plate 65.
The lower die 29 is placed below the upper die 27 via the support bar 72.
It is suspended and supported at a predetermined interval so as to be able to move toward and away from the base.

In the insert molding machine configured as described above, as shown in FIG.
1/4 intermittently via rack 55 and binion 53
By the indexing rotation of the rotating index table 21, the threaded portion of the guide plate 390 is guided by the guide groove 37 and is automatically moved below the injection molding portion 58 of the mold member 31, where it is stopped. And insert work holding device 35
When the cylinder 35b is operated, the holding member 61 moves forward and fits into the V-shaped groove of the support portion 25 of the index table 21, thereby positioning the index table 21 and supporting the indexing position. The insert work 23 supported by the portion 25 is held in a positioned and fixed state by the tip of the holding member 61.

After that, the mold clamping device operates and the hydraulic cylinder 7
1, the movable mold mounting plate 65 moves downward as the tie bar 67 descends. As a result, the mold member 31
The upper mold 27 and the lower mold 29 are moved down a predetermined distance while being separated, and after the lower mold 29 contacts the index table 21, the upper mold 27 and the lower mold 29 approach each other. , and finally the index table 21. Together with the guide plate 39, the spacer 45, and the fixed plate 47, the mold is clamped between the movable mold mounting plate 65 and the fixed mold mounting plate 69.

Thereafter, the nozzle 43 of the injection device comes into contact with the nozzle bush 41a of the mold member 31, and resin is injected from the nozzle 43 into the resin introduction path 41 of the mold member 31. The resin injected into the resin introduction path 41 passes through the flow path 41b and enters the cavity 3.
1a, the resin fixing piece 1 of the insert work 23
It is molded around 5 and fixed.

On the other hand, after the above molding, the nozzle 43 of the injection device separates from the mold member 31, and the insert work holding device 3
5 is released, the movable mold mounting plate 65 moves upward together with the tie bar 67 due to the operation of the mold clamping device, the mold member 31 is separated from the index table 21, and the upper mold 27
and the lower mold 29 are separated, and the sprue runner inside the mold member 31 is discharged by a take-out machine.

Thereafter, the hydraulic cylinder 59 is operated again to index and rotate the index table 21, and the molded insert work 23 is moved to the discharge section while being supported by the support section 25. At this time, the insert work 23 is
As shown in FIGS. 1 and 4, it gradually moves upward along the guide groove 37 of the guide plate 39, moves toward the outer periphery of the index table 21, and naturally falls into the insert work removal section.

In the insert mold configured as above, the mold member 31 and the index table 21. X inner plate (guiding device)
A mold consisting of 39, etc. is installed in the mold clamping device, and the insert work 23 is supported by the index table 21, and by indexing rotation thereof, the insert work 23 is automatically inserted into the mold member 31.
The index table 21 is supplied to the injection molding unit 58, and after being stopped and positioned there, the resin is injection molded onto a predetermined portion of the insert work 23, and after molding, the index table 21 is
Since the insert workpiece 23 is taken out from the injection molding part 58 as the insert workpiece 23 is indexed and rotated, a special operating device such as a robot or the like is not required for handling the insert workpiece 23, and no setting space is required. An insert mold that can reliably supply the workpiece 23 to the injection molding section 58 of the mold member 31 and reliably discharge the workpiece therefrom, is inexpensive, and increases the productivity of the insert molding machine. can be provided.

〔Effect of the invention〕

As described above, according to the present invention, the insert mold 4 is
An index table in which a plurality of support parts supporting an insert work are formed at a certain angle from the center and can be indexed at a certain angle, and an index stop position of the support part on one side of the index table. a mold member disposed on the other side of the index table and provided with an injection molding part that forms a cavity into which the insert work is inserted together with the index table; Since it is configured with a guide device that guides the insert work to the indexing stop position and also discharges the molded product molded in the mold member to the outside of the index table, it is possible to supply the insert work to the injection molding section,
We have created an insert mold in which positioning and ejection can be performed efficiently and reliably through the indexing rotation of the index table and the action of the guide device, which is structurally simple and inexpensive, and which can increase the productivity of the insert molding machine. It has the advantage of being able to provide

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a perspective view of essential parts showing an embodiment of the insert mold of the present invention, Fig. 2 is a vertical sectional view showing the assembled state of the insert mold of Fig. 1, 3 is a top view showing the rank shown in FIG. 2, FIG. 4 is a longitudinal sectional view showing the guide groove of the guide plate shown in FIG. 2, and FIG. 5 is a top view showing the insert work holding member shown in FIG. 1. Fig. 6 is a front view showing the entire insert molding machine using the insert mold shown in Fig. 1, Fig. 7 is a perspective view showing an example of an insert work, and Fig. 8 is a perspective view showing an insert work that has been insert molded. It is. 21... Index table, 23... Insert work, 25... Support part, 31... Injection mold, 58... Injection molding part. Figure 1 Figure 5 Figure 7 Figure 8 Figure 6

Claims (1)

[Claims] an index table in which a plurality of support parts supporting the insert work are formed at a certain angle from the center, and indexable at the certain angle; and an indexing stop of the support part on one side of the index table. a mold member provided with an injection molding part that is disposed at a position and forms a cavity in which the insert work is inserted together with the index table; An insert mold comprising: a guide device that guides the insert work to an indexing stop position and discharges a molded product formed within the mold member to the outside of the index table.