JPH0890603A - Injection mold - Google Patents

Abstract

PURPOSE: To obtain an injection molding die in which an insert can be exchanged without removing a mold from an injection molding machine and a plurality of molded pieces partially different in shape can be molded by one mold. CONSTITUTION: In an injection molding die provided with a movable retainer plate 1 and a stationary retainer plate, an insert 3 is provided in either retainer plate. The insert 3 is fixed by a fixing member 4 on the rear side of the retainer plate provided with the insert 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding die, and more particularly to an injection molding die having a mold plate provided with a nest.

[0002]

2. Description of the Related Art Conventionally, in the case of molding a plurality of molded products having partially different shapes, a means for preparing a plurality of molds according to the shape of the molded product and a part having a different shape are used as nests. The corresponding means has been adopted by preparing and exchanging a plurality of.

[0003]

However, when the above-mentioned means for preparing two types of molds is used, it is effective in preventing the loss of the insert, but the mold cost is high, and However, there is a problem that it requires double the man-hours for both design and production.

Although the latter means for replacing the insert is excellent, the attachment structure of this insert is fixed by bolts or the like from the back side of the product insert fitted to the template. ing. Therefore, in order to replace the insert, the mold cannot be replaced unless the mold is removed from the injection molding machine and the product insert is removed from the template. For this reason, a large number of man-hours are required for the replacement work of the inserts, which is not efficient in terms of productivity.

The present invention has been made in view of the above problems, and an object of the present invention is to solve these problems and replace the insert with a die injection molding machine. (EN) Provided is an injection molding die which can be formed without further removal and is capable of molding a plurality of moldings having partially different shapes with one kind of die.

[0006]

In the injection molding die of the present invention, an injection molding die having a movable side mold plate and a fixed side mold plate is provided with a nest in any one of the above mold plates. The insert is fixed by a fixing member from the back side of the template provided with the insert.

[0007]

In the injection mold of the present invention, the insert is
Since the mold is fixed from the back side of the mold plate with the insert, the insert can be replaced without removing the mold from the injection molding machine, and it is necessary to make multiple molds only by making the insert. Since there is no die, the die cost can be greatly reduced, and the work of exchanging the insert can be easily performed, and the productivity can be improved.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a main part of an example of an injection molding die of the present invention. In FIG. 1, reference numeral 1 denotes a movable side mold plate, and a product insert 2 is fitted and provided on the movable side mold plate 1. 3 is a replacement nest, and this nest 3
Is from the parting surface 2a side of the product insert 2 to the rear end 3
Part a is inserted in the movable mold plate 1 and fitted in the product insert 2.

From the rear surface of the movable side mold plate 1,
The bolt 4 is fixed to the screw hole 3b provided in the rear end portion 3a with a bolt 4 which is a fixing member. When replacing, the bolt 4 should be removed while the mold is open and the mold is still attached to the injection molding machine. Thus, it can be removed from the parting surface 2a side.

FIG. 2 is a cross-sectional view showing an embodiment of replacing the insert of the injection molding die shown in FIG. In FIG. 2, 41
1 is a long-shaft bolt which is replaced and attached after the bolt 4 shown in FIG. 1 is removed. This bolt 41 is used for replacing the insert 3, and FIG. The head 41a is hit by a hammer or the like in the direction of the arrow, and the insert 3 is pulled out partway forward. When the head 41a of the bolt 41 is further hit, the insert 3 is completely removed from the product insert 2, and the removal of the insert 3 is completed.

After removing the insert 3, another insert to be replaced is fitted from the parting surface 2a side of the product insert 2 and fixed by the bolt 4 from the movable side mold plate 1 side. , It is possible to complete the replacement work of the nest.

In the injection molding die of the present invention, when the design of a part of the product is changed, or when the round boss is changed to a square boss, or when it is changed to a rib, etc.
It can be implemented at a very low cost.

In the embodiment of the injection molding die of the present invention, the insert is used by being fitted into the product insert provided on the movable side mold plate, but the present invention is not limited to this. Instead of being a thing, it may be fitted and provided in the product insert of the fixed side template side.

[0014]

In the injection molding die of the present invention, since the insert is fixed by the fixing member from the back side of the mold plate provided with the insert, the replacement of the insert is performed by injection molding the mold. It can be done without removing it from the machine, and it is not necessary to make multiple molds only by manufacturing the nest, so the mold cost can be greatly reduced, and further,
It is possible to easily replace the nest and improve productivity. Therefore, it is suitably used as an injection molding die provided with a replaceable insert.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of an example of an injection molding die of the present invention.

FIG. 2 is a cross-sectional view showing an embodiment of nesting exchange of the injection molding die shown in FIG.

[Explanation of symbols]

 1 movable side template 2 product insert 2a parting surface 3 insert 3a rear end 3b screw hole 4 bolt

Claims (1)

[Claims] 1. An injection molding die having a movable side mold plate and a fixed side mold plate, wherein one of the mold plates is provided with a nest, and the nest is provided with the nest. An injection molding die characterized in that it is fixed by a fixing member from the back side of the.