JPH05293848A - Insert used for resin molding - Google Patents

Abstract

(57) [Abstract] [Purpose] With regard to inserts used for resin molding, it is an object to be able to handle individual inserts in the same manner as hoop-shaped inserts, and to efficiently set the inserts in a mold. An insert used for resin molding, comprising a first insert 1 in the shape of a hoop and at least one type of second insert 2 in the shape of an individual piece, wherein the first insert 1 is the first insert The second insert 2 has a supporting protrusion 1a corresponding to the second insert 2.
Is configured to be held at a predetermined position by the support protrusion 1a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert used for resin molding, and more particularly to an insert used for resin molding capable of efficiently setting at least two kinds of inserts, one of which is a hoop shape and the other of which is an individual piece, in a mold.

In recent years, plastic has been used as a material for various electronic components, and among the electronic components, for example, in the mass-produced mechanical components such as relays, connectors and switches, it is indispensable as a structural material. It has become.

The reason why various plastic materials are used is that new materials have been developed one after another and there are many kinds, so that various performances and functions can be selected according to the purpose. It is also largely due to the progress of molding technology. However, there is still room for improvement in the molding technology.

[0004]

2. Description of the Related Art When plastic is used as a structural material for electronic parts and the like, it is often practiced to embed different parts such as metal parts called inserts in the plastic by insert molding.

FIG. 4 is a perspective view of an example of resin molding for sealing the insert, FIG. 4 (A) is a partially cutaway perspective view of the insert, and FIG. 4 (B) is a perspective view of the insert molded product.
In the figure, 1 is a first insert, 2 is a second insert, 3 is a lower mold, and 4 is a resin.

The two resin-molded inserts 1 and 2 exemplified here are assembly parts of an electromagnetic relay, and are a coil terminal and a yoke. That is, the first insert 1 is a coil terminal, and is in the form of a so-called hoop material in which a thin strip of phosphor bronze, for example, is punched out and the terminals are connected in pairs.

On the other hand, the yoke of the second insert 2 is magnetic iron or the like, and not only the material is completely different from the coil terminal of the first insert 1, but also the shape such as thickness is different. .. The second insert 2 is a discrete piece unlike the first insert 1 having a hoop shape. Furthermore, the first insert 1
And the second insert 2 are not in contact with each other and the second insert 2 is sealed in a floating configuration.

For this reason, when resin-molding these two types of inserts 1 and 2, after the first hoop-shaped insert 1 is set in the lower mold 3 as shown in FIG. 4 (A), Set the second insert 2 one by one. Then, the inserts 1 and 2 are sandwiched and fixed by an upper mold (not shown) that abuts the lower mold 3, and resin molding is performed.

In FIG. 4B, when the resin molding is completed and the mold is released, the insert molded product of the first insert 1 and the second insert 2 forming a pair, which are fixed by the resin 4 in a predetermined positional relationship, is hooped. Formed into a shape. After that, if the terminals of the first insert 1 are separated from the connecting material, individual insert molded products are completed.

[0010]

Thus, in resin molding in which at least two kinds of different kinds of inserts are combined, even if one of the inserts can be continuously connected in a hoop shape, the other can not be continuously connected in a hoop shape. Because of this, there are often individual pieces.

When such dissimilar inserts are set in the mold, the hoop-shaped inserts can be set at once, but the individual inserts must be set one by one. Moreover, this kind of complicated work was performed by relying on human hands.

For this reason, not only the resin molding for sealing the insert cannot be continuously and automatically molded, but also a hand clearance is required to hinder the efficiency of the molding process. Therefore, the present invention provides an insert used for resin molding capable of continuous automatic molding by providing a supporting protrusion on one insert having a hoop shape and holding the other insert having a piece shape by the supporting protrusion. Has a purpose.

[0013]

[Means for Solving the Problems] The above-mentioned problem is an insert used for resin molding, comprising a first insert in the shape of a hoop and at least one second insert in the shape of an individual piece. , The first insert has a supporting protrusion corresponding to the second insert, and the second insert is configured to be held in a predetermined position by the supporting protrusion. It is solved by the insert used for resin molding.

[0014]

In the present invention, when one hoop-shaped insert and the other at least one piece-shaped insert are resin-molded, it is not necessary to set each piece-shaped insert in the mold in the present invention. I am trying to finish it.

That is, a supporting protrusion is provided on the hoop-shaped first insert, and the supporting protrusion holds the second insert in advance. By doing so, the individual second insert can be handled in the same way as the hoop first insert, so efficiency can be achieved by automating the insert without setting it in manual work when setting it in the mold. ..

[0016]

1 is a perspective view of a first embodiment of the present invention, FIG. 1 (A) is an exploded perspective view, FIG. 1 (B) is an enlarged perspective view of a main portion, and FIG. 2 is a perspective view of the present invention. FIG. 3 is a perspective view of the main part of the second embodiment.
[FIG. 6] is a perspective view of a main part of a third embodiment of the present invention. In the figure, 1 is a first insert, 1a is a support protrusion, 1b is a grip, 2 is a second insert, 2a is a support groove, and 10 is an insert assembly.

The insert assembly 10 exemplified here is an insert part of an electromagnetic relay, in which a first insert 1 having a hoop shape is a coil terminal, and a second insert 2 having an individual shape.
Is a yoke and is composed of completely different materials.

Embodiment 1 In FIG. 1, the first insert 1 is provided with supporting projections 1a which are cut and raised so as to face each other. This support protrusion
The distance between the ends of 1a is approximately equal to the longitudinal length of the second insert 2. Then, the second insert 2 is sandwiched between the support protrusions 1a and fixed by spot welding or the like, whereby the insert assembly 10 is completed.

If the material of the first insert 1 is a spring material, the interval between the opposing support projections 1a is made slightly narrower than the length of the second insert 2 to elastically clamp the second insert 2 It is also possible to leave them to be welded.

The work of holding the second insert 2 between the first insert 1 and welding the first insert 1 can be carried out automatically by the hoop-like shape of the first insert 1. Can also be automated.

Embodiment 2 In FIG. 2, a supporting groove 2a is provided on the rear end face of the second insert 2. And the first insert 1
When the second insert 2 is held by the support protrusion 1a, the support protrusion 1a is engaged with the support groove 2a and held. If the material of the first insert 1 is a spring material, the support groove 2a can be elastically held by the opposing support protrusions 1a.

By the way, once the insert assembly 10 is set in the mold, it is held by upper and lower molds, insert pins and the like, which are not shown. Therefore, the second insert 2 may be mechanically held by the first insert 1 without welding or the like until the insert assembly 10 is set in the mold.

Embodiment 3 In FIG. 3, the end portion of the support protrusion 1a of the first insert 1 is a grip portion 1b formed in a kite shape. Therefore,
If the support protrusions 1a are provided so as to face each other, the second insert 2 can be engaged and pinched with the grip portion 1b. If the material of the first insert 1 is a spring material, it can be elastically held.

According to this example, the second insert 2 can be moved up and down while being held by the grip portion 1b. Therefore, when the insert assembly 10 is set in the mold and the upper and lower molds are abutted against each other, for example, the second insert 2 is pushed down by the upper mold to move and positioned and held in the lower mold. become.

Here, both the first hoop-shaped insert and the second individual piece-shaped insert are illustrated as simple shapes. In some cases, various modifications can be made to the support protrusions provided on the first insert depending on the shape and number of each insert and the assembling method.

[0026]

According to the present invention, when at least two different types of inserts, one of which is a hoop shape and the other of which is an individual piece, are molded by resin, the individual piece insert is temporarily held in advance on the hoop insert. Since it is set, it is not necessary to set the individual inserts one by one in the mold.

Therefore, the present invention is directed to the rationalization of the manufacturing process of electronic parts, especially the mechanical parts, in which the insert molding has become an essential manufacturing technology in accordance with the demand for smaller size and higher functionality. Has a large contribution.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention, (A) is an exploded perspective view, and (B) is an enlarged perspective view of a main part.

FIG. 2 is a perspective view of a main part of a second embodiment of the present invention.

FIG. 3 is a perspective view of an essential part of a third embodiment of the present invention.

FIG. 4 is a perspective view of an example of resin molding for sealing the insert, (A) is a partially cutaway perspective view of the insert, and (B) is a perspective view.
FIG. 4 is a perspective view of an insert-molded product.

[Explanation of symbols]

1 1st insert 1a Support protrusion 1b
Grip 2 Second insert 2a Support groove 10 Insert assembly

Claims (5)

[Claims] 1. A first hoop-shaped insert (1)
And at least one type of second insert in the form of an individual piece
An insert used for resin molding, comprising (2), wherein the first insert (1) is the second insert.
(2) having a supporting protrusion (1a) corresponding to, the second insert (2) is characterized in that it is held in a predetermined position by the supporting protrusion (1a) Insert used for molding. 2. The first insert (1) has a support protrusion.
The insert used for resin molding according to claim 1, wherein (1a) are opposed to each other and form a pair and are made of a spring material. 3. The insert used in resin molding according to claim 1, wherein the second insert (2) is held by being welded to the support protrusion (1a). 4. The second insert (2) has a support groove (2a) at the end facing back, and the first insert (1) has a support groove (1a) facing each other. The insert used for resin molding according to claim 2, wherein the end portion engages with the support groove (2a) of the second insert (2) and elastically clamps it. 5. The first insert (1) engages with an end of the second insert (2) by forming an upside-down gripping part (1b) at an end of the opposing support protrusion (1a). The insert used for resin molding according to claim 2, wherein the insert is elastically sandwiched.