JPH04176610A - Mold assembly with feeding structure of metallic insert part - Google Patents

Abstract

PURPOSE:To automate the parallel insert molding, to enhance the accuracy of an insert and to shorten molding cycle by a structure wherein an insert feed passage, which is normal to a parting face and penetrates from the outer side face of molds into a molding space is formed and, in addition, a metallic insert part feeding mechanism is mounted onto the outer side face of the molds. CONSTITUTION:In a slide space 8, which partitions into a fixed mold 4 and a movable mold 6, a slide core 12, which has an inside face 12a facing to a molding space 10 and an outside face 12b normal to a parting face P, is provided. The slide core 12 is slidingly driven by an angular pin 13. The outside face 12b constitutes some part of the outside face of the molds. Further, in the slide core 12, an insert feed passage 18, which penetrates from the outside face 12b into the molding space 10 is formed and, in addition, an metallic insert part feeding mechanism 20 is provided onto the outside face 12b. Thus, a metallic insert part 36 is fed from the outside face 12b of the molds normal to the parting face P through the insert feed passage 18 to the predetermined position on the molding space 10 side so as to be molded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a mold device that performs insert molding.

[Conventional technology] Insert molding has traditionally been done manually due to the risk of damage to the mold due to improper attachment of the insert fittings, but this has resulted in lower efficiency due to unstable molding cycles and a high molding failure rate due to human error. Automation is being attempted using multi-1!1m robots, interlocking structures between articulated robots and three-wheeled traverse type extraction robots, etc. In such a method using a robot, the insert fittings are held one by one with a robot hand and placed at a predetermined insert position in the molding space when the mold is opened.

However, when a robot is used, it takes too much time for the robot to reciprocate, leading to a decrease in molding efficiency, as well as difficulty in positioning the robot hand and increasing equipment costs.

In addition, the same applies to manual operations, but the mold opening stroke must be increased, and the molded product removal operation and insert operation are sequential, so-called series operations, which lengthens the molding takt and reduces efficiency. are doing.

For this reason, in Japanese Utility Model Application Publication No. 61-138522, a component hole penetrating from the ejector plate side to the molding space is formed in the movable mold, and a positioning means for the insert component is provided on the fixed mold side of the molding space. A structure has been proposed in which the insert parts stacked and stocked are pushed into the molding space through the part hole by a part extrusion pin fixed to a pressing plate in the form of an ejector plate when the mold is opened.

According to this, the insert accuracy can be improved with a simpler structure than automation using a robot, and since the insert operates in one direction, the molding cycle can be shortened.

In addition, in Utility Model Application Publication No. 1-27214, since the above-mentioned improved device uses a movable type, it is difficult to create a flexible automatic supply line for insert parts including a parts feeder, and the insert timing does not match the mold opening/closing operation. In order to solve the problem that there is a certain limit to the efficiency of the molding cycle due to regulations, insert parts are molded by a supply mechanism that is independent of the opening and closing operation of the mold through component supply holes drilled in the fixed mold. A structure that supplies space has been proposed.

[Problems to be Solved by the Invention] By the way, in this type of insert molding, there are basically two directions for inserting an insert component into a molded product: perpendicular and parallel to the parting surface, but as described above, Conventional products are based on automation using the opening and closing operations of the mold, and because they are built inside the mold structurally, the insert direction is generally perpendicular to the parting surface. It is within the technological range.

For this reason, in so-called parallel insert molding in which the insert direction is parallel to the parting surface, a holding hole is formed in the slide core and the molding space is used when the mold is opened to mount the insert by the above-mentioned manual or robot method. For this reason, parallel insert molding still has the problems described above.

Therefore, an object of the present invention is to provide a mold device that can automate insert molding parallel to the parting surface, improve insert precision, and shorten the molding cycle.

[Means to solve the problem]

This invention aims to achieve the above object (invented),
Its feature is that an insert supply path is formed that reaches into the molding space from the outside surface of the mold perpendicular to the parting surface, and an insert fitting supply mechanism is attached to the outside surface of the mold.

Further, according to the present invention, the insert supply path may be formed in the slide core.

[For production]

According to this invention, the insert fitting supply mechanism allows
The insert fitting is supplied to a predetermined position on the molding space side through the insert supply path from the outer surface of the mold perpendicular to the parting surface, and molding is performed.

Further, according to the present invention, the insert fitting supply mechanism supplies the insert fitting to a predetermined position on the molding space side from the outer surface of the slide core that constitutes a part of the outer surface of the mold via the insert supply path, Molding is done.

〔Example〕

1 to 5 show an embodiment of the present invention.

The mold device 2 is equipped with a fixed mold 4 and a movable mold 6, and a slide space 8 defined between the fixed mold 4 and the movable mold 6 has an inner surface 12a facing the molding space 10 and a part A slide core 12 having an outer surface 12b orthogonal to the sliding surface P is provided. The slide core 12 is slidably driven by an angular pin 13, and its outer surface 12b
constitutes a part of the outer surface of the mold. In FIG. 1, reference numeral 14 indicates a locking plate, and reference numeral 16 indicates a locking plate.
shows a sliding core stone bar.

Further, the slide core 12 is formed with an insert supply path 8 extending from the outer surface 12b into the molding space 10, and an insert fitting supply mechanism 20 is provided on the outer surface 12b.

The insert fitting supply mechanism 20 includes a driving member 22 such as an air cylinder, a mounting plate 24 attached to the outer surface 12b of the slide core 12, and the mounting plate 2.
4 and the drive member 2
2 and the mounting plate 24, and the slide block 32 is driven forward and backward by the cylinder power 30 of the drive member 22. The insert block 26 has a parts feeder (not shown) having an aligning function to insert the insert metal fittings 36 into the insert block 26.
The supply pipe 38 for pneumatically feeding the joint member 40
Can be connected via. Reference numeral 32a indicates a slide bush.

The mounting plate 24 is formed with a mounting hole 24a for fixing to the outer surface 12b, and also has an insertion hole 24b for the insert press pin 34. In addition, the insert metal fittings 36 that are fed under pressure through the supply pipe 38 are inserted into the insert supply path 1 into the insert block 26.
A setting hole 26a is formed to allow the setting to be carried out, and an insertion hole 26b for the insert press pin 34 is formed in communication with this hole 26a.

The insert fitting press pin 34 has a holding recess 34a formed at its tip end for suctioning and holding the insert fitting 36, and a suction hole 34b communicating with the holding recess 34a to the rear end. The rear end 34c of the suction hole 34b is connected to a vacuum device (not shown) via an exhaust pipe 42.

Next, the feeding operation of the insert fitting 36 will be explained based on FIGS. 4 and 5.

When the insert metal fitting 36 is force-fed from the parts feeder through the supply pipe 38, the insert metal fitting 36 enters the setting hole 26a of the insert block 26, comes into contact with the front surface 26c, and is pushed onto the insert metal pressing bin 34 by its own weight. Fall. From this state, when the insert fitting press pin 34 is moved back to the retreat position 1 by the operation of the drive member 22, the insert fitting 36 falls to the center position of the insert supply path 18. Here, the metal insert 36 is held by suction in the holding recess 34a of the metal insert press pin 34.

When the insert fitting 36 is held (detected), the drive member 22 operates to move the slide block 32 forward, and the insert fitting pressing pin 34 moves through the insert supply path 18 to move the insert to the forward position 2, which is a predetermined position. The molding space 10 of the insert fitting 36 is
Positioning is performed at . When the tip of the insert fitting press pin 34 is in the forward position and set to 2, the cylinder power of the drive member 22 is switched to a high pressure so as to have a counter force greater than the resin pressure that the insert fitting 36 receives.

From this state, automatic molding operation is performed through pre-operation preparation work for the mold, and after molding is completed, the vacuum switch is turned off.

The cylinder power of the drive member 22 is low until the insert fitting press pin 34 reaches the forward position 2, and thereby the tip of the sleeve-shaped insert fitting press pin 34 and the insert fitting 36 can be mutually protected. . As a molding machine interlock circuit, a circuit may be provided that stops injection when the forward position detection signal of the insert metal press pin 34 and the vacuum switch are turned off.

When the mold closing operation starts, the insert fitting 36 for the next cycle of the parts feeder collar is inserted into the insert block 2.
6. When the molding is completed and the mold is opened, the slide core 12 moves and the molded product 44 is released with the insert fitting 36 attached. After the molding is completed, the cylinder power of the drive member 22 for retracting the insert fitting press pin 34 also becomes low pressure.

In this example, since the stroke of the slide core 12 is set to the minimum value that allows the insert fitting 36 to be released from the mold, the insert fitting 36 for the next cycle is pushed out while the molded product 44 remains in the molding space 10. It comes into contact with the molded insert fitting 36. Therefore, the forward movement of the insert fitting press pin 34 for the next cycle is performed after the ejection of the molded product 44 is completed. Note that, for example, if the stroke of the slide core 12 is doubled, the timing setting as described above becomes unnecessary, and the molding cycle can be further shortened.

As described above, by providing the entire structure of the insert fitting supply mechanism 20 on the outer surface 12b of the slide core 12 orthogonal to the parting surface P, the insert fitting pressing pin 34 can be operated regardless of the opening/closing operation of the mold. Therefore, the insert fittings 36 can be appropriately and easily supplied, and the molding cycle can be shortened.

Further, since the supply of the insert fitting 36 and the removal of the molded product 44 can be performed independently, the configuration of the mold can be simplified and the degree of freedom in operating timing can be increased. Therefore, it is possible to improve work efficiency and reduce work costs.

Next, FIG. 6 shows a suitable and simple example for preventing the insert fitting 36 from being pushed back to the outside of the slide core 12 due to the internal pressure of the resin. The opening/closing operation of the mold is used, and for example, a locking plate 46 can be provided on the fixed side mold 4 to be located on the back side of the slide block 32 in the closed position.

Next, FIG. 7 shows a modification of the connection structure between the cylinder rod 30 of the drive member 22 and the insert fitting pressing pin 34. A tip end 30b of a cylinder rod 30 having an axial air hole 30a is connected to the cylindrical member 48 connected to the insert block 26 in a manner that prevents it from coming off. is connected. The tip of the insert press bottle 34 is supported by a support member 50 that seals the tip of the cylindrical member 48 . Reference numeral 52 indicates a bearing member or a seal member. Note that the insert fitting press pin 34 and the cylinder rod 30 may be formed integrally.

Next, FIG. 8 shows a modification of the positioning structure of the insert fitting 36. A branch passage 54 that obliquely communicates with the insert supply passage 18 is formed in the slide core 12, and the insert fitting 36 is fed under pressure through this branch passage 54. The press-fed insert metal fitting 36 enters the molding space 10
It comes into contact with the stopper pin 56 inside and stops. After the insert fitting 36 has stopped, the insert fitting pressing pin 58, which is, for example, a simple round bar, is driven forward, whereby the insert fitting 36 is positioned and held at a predetermined position.

In each of the above cases, the outer surface 12b of the slide core 12
Although an example is shown in which the insert fitting supply mechanism 20 is attached, it can also be attached to the outer surface of the mold other than the slide core 12, as shown in FIG. That is, if a common insert supply path is formed between the fixed mold 4 and the movable mold 6,
The molded product 6o is removed by the retreat of the insert metal press bottle 34.
It becomes possible to release the mold.

〔Effect of the invention〕

According to this invention, since the insert metal fittings can be fed regardless of the opening/closing operation of the mold, the insert metal fittings can be fed appropriately and easily, and the molding cycle can be shortened.

Furthermore, since the entire structure of the insert fitting supply mechanism can be attached to the outer surface of the mold, the insert fitting feeding mechanism can be formed without being influenced by the mold structure, and the mold structure can be simplified.

Further, since the supply of the insert fitting and the removal of the molded product can be performed independently, the degree of freedom in operating timing can be increased. Therefore, it is possible to improve work efficiency and reduce work costs.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the main parts of a mold device having an insert fitting supply structure according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view from the top side of the figure, and Fig. 3 is an insert fitting supply mechanism. 4 and 5 are schematic cross-sectional views of the keyaki in the second figure showing the insert fitting feeding operation, and FIG. 6 is a principal part sectional view showing a modification of the locking mechanism of the insert fitting feeding mechanism. Figure 7 is a cross-sectional view of the main parts showing a modification of the insert metal supply mechanism, Figure 8 is a schematic cross-sectional view showing a modification of the insert metal supply structure, and Figure 9 is a method using the outside surface of the mold other than the slide core. FIG. 10... Molding space 12... Slide core 12b... Outer surface (mold outer surface) 18... Insert supply path 20... Insert fitting supply mechanism P... Parting surface Patent applicant Plus Giken Co., Ltd. Agent Patent Attorney Yoshi 1) Manmaki Ward Figure 8

Claims (2)

[Claims] (1) A mold device having an insert fitting supply structure in which an insert supply path is formed that reaches into the molding space from the mold outer surface perpendicular to the parting surface, and an insert fitting supply mechanism is attached to the mold outer surface. (2) A mold device having the insert fitting supply structure according to claim 1, wherein the insert supply path is formed in a slide core.