JPH06126781A - Insert mold - Google Patents

Abstract

PURPOSE:To provide an insert mold allowing to deal with insert materials different in diameter by a method wherein the amount of projection of a supporting pin beyond the surface of a cavity is controlled through external operation without disassembling a mold. CONSTITUTION:In the insert mold, a mandrel 25 is involved in molding material injected in a cavity 23, in which the mandrel 25 is supported, after mold closing under the condition that a supporting pin 4, which abuts against the mandrel 25 and is held movable back and forth to the mold opening and closing direction, a cylinder 6, with which the supporting pin 4 is driven, and setscrews 3, with which the forward bound and backward bound of the supporting pin 4 are controlled, are equipped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert molding die for enclosing and molding an insert material.

[0002]

2. Description of the Related Art A conventional insert molding die will be described below.

For example, the grip portion of the steering wheel is different in the moment of inertia of the steering wheel,
The type in which the diameter of the core metal is different is set based on the difference in the vibration resonance frequency. In addition, in the insert molding die, it is common practice to provide a support pin that regulates the height of the core metal so that the core metal is fixed at a desired position of the steering grip.

Regarding this type of molding die, there are those disclosed in JP-A-55-152034, JP-A-63-41118, and JP-A-61-111711.

[0005]

However, when attempting to injection-mold steering wheels having different core metal diameters, the molding die is removed from the molding machine each time, and the support pin is divided into a fixed die and a movable die. It is necessary to replace the one with a predetermined length, which causes a problem that man-hours and maintenance costs increase and productivity is lowered.

The present invention solves the above-mentioned problems of the prior art, and copes with insert materials having different diameters by controlling the protrusion amount of the support pin from the cavity surface by an external operation without disassembling the molding die. It is an object of the present invention to provide an insert molding die that can be used.

[0007]

In order to achieve this object, the insert molding die of the present invention supports the insert material in the cavity, and after the mold is closed, the molding material is injected into the cavity to form the insert material. An insert molding die for encapsulating and molding, a support pin held in contact with an insert material and capable of moving forward and backward in a mold opening and closing direction, a drive device for driving the support pin, a forward limit and a backward movement of the support pin. And an adjusting device that regulates the limit.

[0008]

With this configuration, the support pin is driven by the drive device, and the forward limit and the backward limit of the support pin are regulated by the adjusting device, whereby the amount of protrusion of the support pin from the cavity surface is disassembled from the mold. Since it can be automatically regulated by an external operation, the insert material can be switched by an extremely simple operation, and man-hours and maintenance costs can be reduced to improve productivity.

[0009]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a sectional view of an insert molding die for molding a steering wheel. This insert molding die includes a support pin 4 that supports a core metal 25 that is an insert material.
And a drive device 5 for driving the support pin 4, and an adjusting device 3 for restricting the forward limit and the backward limit of the support pin 4.

In the figure, the mold mounting plate 1 is provided with dies 21, 2
2 is attached, and concave cavities 23, which are products, are formed in the molds 21 and 22. A cored bar 25 is supported in the cavity 23 by a support pin 4 which can move forward and backward in the mold opening and closing direction. A flange 4a is formed at the lower end of the support pin 4, and the flange 4a and the mold 21 are formed. A spring 8 is provided between the lower surface and the lower surface.

The mold mounting plate 1 has an adjusting screw (adjusting device).
A movable base plate 2 movable in the mold opening / closing direction is supported by 3, and the movable base plate 2 is biased in the mold opening / closing direction by a spring 9. A cylinder 6 of a drive unit 5 is mounted on the movable base plate 2. The cylinder 6 can be moved forward and backward in the mold opening and closing direction, and the forward limit and the backward limit are restricted by the dimensional difference of the core metal 25. A piston 7 is provided, which is connected to the support pin 4. Further, the support pin 4 and the piston 7 are provided at several positions on the mold 21, and are arranged so as to operate them at the same time.

In the insert molding die as described above, when the core metal 25 is changed to a small diameter one, it is necessary to increase the length of the support pin 4 projecting into the cavity 23. In this case, the cylinder is used. When the fluid is sent into 6 and the piston 7 is moved forward, the piston 7
Moves forward by the stroke of the dimension difference and stops at the forward limit. After that, the protruding length of the support pin 4 protruding into the cavity 23 is finely adjusted to an optimum position via the movable base plate 2 by adjusting the adjusting screw 3. That is, the position of the cylinder 6 is finely adjusted by the adjusting screw 3, and the support pin 4
The forward limit and the backward limit of are regulated.

When the core metal 25 having a large diameter is to be changed, the reverse operation may be carried out. The piston 7 is moved to the backward limit and the adjusting screw 3 is used for fine adjustment.

As described above, according to this embodiment, the core metal 25
A support pin 4 that is held in contact with the mold and is held so as to move back and forth in the mold opening and closing direction; a cylinder 6 that drives the support pin 4; and an adjusting screw 3 that restricts the forward and backward limits of the support pin 4. , It is possible to correspond to the diameters of the two kinds of core metal 25 with one kind of support pin 4, and the molds 21, 22
It is possible to operate several pistons 7 at a time by remote control without disassembling, and very easily
Since 5 can be switched, the work is easy and the maintenance cost is reduced.

Further, as shown in FIG. 2, two pistons 7, 7 are arranged so as to face each other in the mold opening / closing direction, and the forward limit and the backward limit of the respective pistons 7, 7 are regulated in advance. It is possible to correspond to four kinds of diameters of the cored bar 25 with one kind of support pin 4.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIG.

In the figure, 4 is a support pin, 6 is a cylinder, 7 is a piston, and 25 is a cored bar, and these are the same as the configuration of FIG. 1 is different from the configuration shown in FIG. 1 in that a shaft 10 having a tapered portion 10a is provided in a mold mounting plate 1 and a slide portion 2a protruding from a movable base plate 2 is brought into contact with the tapered portion 10a so that the shaft 10 The adjustment screw (adjustment device) 13 is provided on one end side, and the spring 11 is provided on the other end side.

With this configuration, when the core metal 25 is changed,
After the piston 7 is moved by the stroke of the dimensional difference of the core metal 25 and stopped at the forward limit or the backward limit, the adjustment screw 13
Slide the shaft 7 to move the movable base plate 2
The protrusion length of the support pin 4 is finely adjusted via.

By this, it is possible to correspond to the diameters of the two kinds of cored bar 25 with one kind of support pin 4, and the pistons 7 at several places can be remotely operated without disassembling the molds 21 and 22. Since they can be operated simultaneously and the core metal 25 can be switched very easily, the work is easy and the maintenance cost is reduced.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to FIGS.

In the figure, reference numeral 4 is a support pin, and 25 is a core metal, which have the same construction as in FIG. 1 is different from that shown in FIG. 1 in that a mold 21 is provided with a roller receiving piece 14 which is connected to a support pin 4 and is capable of moving forward and backward in the mold opening and closing direction. The point is that a piece 16 and an adjusting screw (adjusting device) 17 for restricting the forward limit and the backward limit of the slide piece 16 are provided. The roller receiving piece 14 is provided with a roller 15, and the slide piece 16 is formed with a tapered surface 16 a that abuts on the roller 15.

With this configuration, when the core metal 25 is changed,
After the slide piece 16 is moved forward and backward by the stroke of the dimensional difference of the core metal 25 and stopped at the forward limit or the backward limit, the slide piece 16 is slid by the adjusting screw 17 to finely adjust the protruding length of the support pin 4. . By this, it is possible to correspond to the diameters of the two kinds of core metal 25 with one kind of support pin 4, and it is possible to operate several slide pieces 16 simultaneously by remote operation without disassembling the mold 21. Moreover, since the core metal 25 can be switched very easily, the work is easy and the maintenance cost is reduced.

Further, as shown in FIG. 5, the mounting portions 1a and 16b of the adjusting screw 17 are made rotatable in the direction of the arrow,
It is locked by using a spring lock 12 or the like, and FIG.
By setting the a and b dimensions so as to correspond to the diameters of the cored bar 25, it is possible to correspond to the four types of the cored bar 25 with one type of support pin 4.

(Fourth Embodiment) A fourth embodiment of the present invention will be described below with reference to FIGS. 6 and 7.

In the figure, reference numeral 4 is a support pin, and 25 is a core metal, which have the same structure as in FIG. The difference from the configuration of FIG. 1 is that the lower surface of the flange 4a of the support pin 4 is a cam slide surface, and the cam (driving device) 18 that abuts against the cam slide on the mold 21 and the forward limit and backward limit of the cam 18 are restricted. The adjusting screw (adjusting device) 17 is provided. A shaft 19 is formed so as to be connected to the cam 18, and a lever 20 is attached to one end of the shaft 19. The rotation angle of the lever 20 is regulated by the adjusting screw 17 at the forward limit and the backward limit.

With this configuration, when the core metal 25 is changed,
Rotate the cam 18 by the rotation angle of the dimensional difference of the core metal 25,
After stopping at the forward limit or the backward limit, the rotation angle of the cam 18 is adjusted by the adjusting screw 17, and the protruding length of the support pin 4 is finely adjusted. As a result, one type of support pin 4 can be used to correspond to the two types of diameters of the core metal 25, and the cams 18 can be operated simultaneously at several locations by remote operation without disassembling the mold 21. Since it is possible and the core metal 25 can be switched very easily, the work is easy and the maintenance cost is reduced.

Further, as shown in FIG. 7, the lever 20 is made rotatable in the direction of the arrow, a block 20a is provided at the contact portion of the adjusting screw 17 of the lever 20, and the dimensions a and b of FIG. If the diameters are set so as to correspond to the diameters, it is possible to correspond to the diameters of the four types of core bars 25 with one type of support pin 4.

[0029]

INDUSTRIAL APPLICABILITY As described above, the present invention provides an insert molding die for supporting the insert material in the cavity and injecting the molding material into the cavity after the mold is closed to encapsulate the insert material for molding. , A support pin held in contact with the insert material so as to be able to move forward and backward in the mold opening and closing direction, a drive device for driving the support pin, and a forward limit of the support pin,
By providing the adjusting device for restricting the backward limit, the support pin can be moved forward and backward into the cavity by the drive device, and the forward limit and backward limit of the support pin can be restricted by the adjusting device. The amount of protrusion of the support pin from the cavity surface can be automatically controlled without disassembling, and the insert material can be switched by an extremely simple operation, which facilitates work and reduces maintenance costs. This improves productivity.

Further, since the position of each support pin can be easily fine-tuned by the adjusting device after advancing (or retreating) the support pin, the optimum state of the support pin is quickly achieved.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of an insert molding die showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of an insert molding die provided with the drive devices facing each other.

FIG. 3 is a partial cross-sectional view of an insert molding die showing a second embodiment of the present invention.

FIG. 4 is a partial sectional view of an insert molding die showing a third embodiment of the present invention.

FIG. 5 (a) is a plan view of the rotatable adjusting device. (B) It is the same side view.

FIG. 6 is a partial sectional view of an insert molding die showing a third embodiment of the present invention.

FIG. 7A is a side view of the rotatable adjusting device. (B) It is the same front view.

[Explanation of symbols]

 1 Type Mounting Plate 2 Movable Base Plate 3 Adjusting Screw (Adjusting Device) 4 Support Pin 5 Drive Device 6 Cylinder 7 Piston 21 Mold 23 Cavity 25 Core Bar (Insert Material)

Claims (1)

[Claims] 1. An insert material is supported in a cavity,
An insert molding die for molding by including an insert material by injecting a molding material into the cavity after the mold is closed, the support pin being in contact with the insert material and being held so as to be movable back and forth in the mold opening and closing direction. An insert molding die, comprising: a drive device that drives the support pin; and an adjusting device that regulates a forward limit and a backward limit of the support pin.