JPS59215843A - Working method of compound injection molding - Google Patents

Abstract

PURPOSE:To simplify the integration process of a cut piece of a sheet plate and a resin by a method wherein the sheet plate continuously fed is cut with a cutting punch in an injection molding die and cut pieces integrated with a resin injected into the die. CONSTITUTION:A sheet plate 7 having a hole 7a formed beforehand is fed continuously into a cutting punch 5 of an injection molding die and the die is closed being cut so that cut pieces are set into a core (formed with cavities 5a and 9a) of the die. A resin 10 is injected about the cut pieces 7b to integrate the cut pieces 7a. After the solidification thereof, a compound injection molding finished is taken out of the die. This method eliminates the need for setting the sheet plate cut beforehand one by one as well as the need for reworking a part of the sheet plate after the integral molding.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a composite injection molding process.

2. Description of the Related Art Structures of Conventional Examples and Their Problems In recent years, composite injection molding processing methods have been widely used as processing methods for products that integrate metal, etc., and resin.

Hereinafter, the conventional composite injection molding method as described above will be explained with reference to the drawings. FIGS. 1 and 2 show a conventional composite injection molding method. FIG. 1 is a partial sectional view showing the composite injection mold in an open state before injection, and FIG. 2 is a partial sectional view after the mold is closed and injection is completed. In FIGS. 1 and 2, 1 is a thin plate, and 1a is a hole formed in the thin plate 1. In FIG. 2 is a movable mold plate constituting the mold, and 2a is a cavity formed in the movable mold plate 2. Reference numeral 3 denotes a fixed side mold plate constituting the mold, and 3a denotes a cavity formed in the fixed side mold plate 3. , 4 is a resin treated with injection light.

FIGS. 3 and 4 show other examples of the conventional composite injection molding processing method in the same manner as described above.

Next, its operation will be explained.

First, the thin plate 1 is set in a composite injection molding mold, the mold is closed, the resin 4 is injected and filled, and after hardening, the composite injection molded product is removed from the cavity by an ejector turbine (not shown) or the like.

However, in the above configuration, it is necessary to cut a part of the thin plates etc. that are integrated after composite injection molding, or to set the thin plates etc. that have been cut in advance one by one.

Further, when combining other parts made of thin plates or the like, another process of assembling is required after the composite injection molding process.

Purpose of the Invention In view of the above points, the present invention provides a composite injection molding method that eliminates the need to cut a part of an integrated thin plate after composite injection molding processing and that allows two or more thin plates to be easily integrated. The aim is to provide a processing method.

Structure of the Invention In order to achieve this object, the composite injection molding processing method of the present invention provides a molding die with one or more composite materials such as thin plates,
The one or more composite materials are cut with a punch forming a cavity and/or core in a part of the mold, and one or more individual pieces cut from the composite materials are placed in the mold. It is constructed by integrally molding injected resin or metal. In addition, two or more materials to be composited such as thin plates are supplied to a molding die, and one or more of the materials to be composited are cut with a punch forming a cavity and/or a core in a part of the mold. , one or more individual pieces cut from one or more of the composite materials, the uncut composite material, and the resin or metal injected into the mold are integrally molded. With this configuration, in the former method, it is not necessary to cut a part of the composite material such as a thin plate after the molding process, since the composite material is cut in the mold immediately before composite injection molding and then integrally molded. In addition, in the latter method, after cutting one or more of the composite materials such as two or more thin plates, it is integrally formed with the composite materials such as thin plates that are not cut, so the assembly process etc. is reduced. That will happen.

DESCRIPTION OF EMBODIMENTS An embodiment of the composite injection molding method of the present invention will be described below with reference to the drawings. FIG. 5 is a partial sectional view showing the composite injection mold in an open state before injection, and FIG. 6 is a partial sectional view after the mold is closed and injection is completed. In FIGS. 5 and 6, reference numeral 5 indicates a cutting punch constituting the molding die. 5a is a cavity formed in a part of the cutting punch 5. 6 is a stripper plate. The end is a thin plate. 7a is a hole formed in the thin plate 7. 7b is a thin plate piece cut from the thin plate 7. 8 is a movable die plate of the mold. 8
a is a cavity formed in a part of the movable die plate 8. 9 is a movable mold plate of the mold. 9a is a cavity formed in a part of the movable mold plate 9. 1o is injection filled resin.

The operation of the processing method using the composite injection mold configured as described above will be described below.

First, the thin plate 7 is set in a composite injection mold, and when the mold is closed, the thin plate 7 is sandwiched between the strip plates 6, the movable die plate 8 comes into contact with the movable die plate 9, and the mold is closed. close. Using the mold closing of this molding machine, the thin plate 7 is cut by the cutting punch 5, either simultaneously with the mold closing or using a separate mechanism, and the thin plate piece 7b cut from the thin plate 7
is sandwiched between the cutting punch 5 and a cavity 9a formed in the movable template 9. After the resin 10 is injected and cured, the composite injection molded product is removed from the cavity using an ejector turbine (not shown) or the like.

As described above, according to this embodiment, a thin plate is supplied to a molding die, the thin plate is cut by a punch in the mold, the punch constitutes a part of the cavity, and the thin plate is cut from the thin plate. By integrally molding the thin plate piece and the resin injected into the mold, there is no need to cut a part of the thin plate after composite injection molding.

Next, a second embodiment of the composite injection molding method of the present invention will be described with reference to the drawings. FIG. 7 is a partial sectional view showing the composite injection mold in an open state before injection, and FIG. 8 is a partial sectional view after the mold is closed and injection is completed. Figure 7.

In FIG. 8, 11 is a thin plate that is not cut within the mold. 11a is a hole formed in the thin plate 11. The rest of the structure is the same as that shown in FIGS. 5 and 6 above. That is, the difference from the configuration shown in FIGS. 5 and 6 is that a thin plate 11 is further provided between the movable die plate 8 and the movable mold plate 9.

Regarding the processing method using the composite injection mold configured as described above, the operation thereof will be described below only with respect to the points that are different from those in FIGS. 5 and 6. In this embodiment, thin plate 11 and thin plate 7
The thin plate piece 7b cut from the resin 10 is sandwiched and twisted at the same time, and composite injection molding is performed with the resin 10 injected into the mold.

As described above, according to this embodiment, two thin plates are supplied to a molding die, one thin plate is cut by a punch in the die, the punch constitutes a part of the capacity, and the thin plate is cut by a punch in the die. By integrally molding the cut thin plate pieces, the uncut thin plate pieces, and the resin injected into the mold, it is possible to reduce the number of assembly steps.

In the first embodiment, one thin plate 7 is cut, but it goes without saying that two or more thin plates 7 may be cut.

Still, in the second embodiment, the thin plate 7. Each of the thin plates 11 that will not be cut is made into one piece, but one of them is made into two pieces.
Needless to say, it is possible to use more than one sheet.

Furthermore, it goes without saying that the thin plates 7 and 11 in both embodiments may be replaced with other rod-shaped composite materials, and it is clear that the resin 1o injected into the mold may be made of metal.

The cavity 5a formed in a part of the punch 5 may be a core, or both may be formed together with the punch 5.

Effects of the Invention As described above, the composite injection molding processing method of the present invention is configured such that a supplied thin plate, etc. is cut with a punch in the molding die, and the thin plate pieces, etc. cut from the thin plate, etc. are molded into metal. By integrally molding the resin injected into the mold with the metal, there is no need to set the pre-cut thin plates one by one, and there is no need to cut part of the thin plates after the integral molding process. Become. Alternatively, two or more thin plates, etc. are supplied, one or more of the thin plates, etc. is cut with a punch in a molding die, and one or more thin plates, etc. are cut from one or more of the thin plates, etc. By integrally molding a thin plate, etc. that is not cut in the mold, with the resin or metal injected into the mold, the assembly process can be reduced, the configuration can be simplified, and the characteristics of the applied product can be unique. You can get things, and their practical effects are like dogs.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view showing a mold opening state before injection of a molding die to explain a conventional composite injection molding processing method, Fig. 2 is a partial sectional view when the same injection is completed, and Fig. 3 is the same. A partial cross-sectional view showing a mold opening state before injection of a molding die to explain a conventional composite injection molding processing method, FIG. 4 is a partial cross-sectional view when the same injection is completed, and FIG. 5 is a composite injection according to the present invention. FIG. 6 is a partial cross-sectional view showing the state of a composite injection mold opened before injection to explain an embodiment of the molding method; FIG. 6 is a partial cross-sectional view when the same injection is completed; FIG. 7 is a composite injection mold of the present invention. FIG. 8 is a partial cross-sectional view showing a composite injection mold in a state where the mold is opened before injection, and FIG. 8 is a partial cross-sectional view when the injection is completed, for explaining the second embodiment of the injection molding processing method. 5-... Cutting punch, 5a... Capity (or core) formed in the cutting punch 5, 7...
・Composite material (thin plate), 7b...Individual pieces (thin plate pieces) cut from composite material (thin plate) 7, 10...Resin (only metal), 11...・Composite material that does not need to be cut (
thin plate). Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 5 Figure 6

Claims (2)

[Claims] (1) Supplying one or more composite materials such as thin plates to the molding die,
Cutting the one or more composite materials with a punch forming a cavity and/or core in a part of the mold, and injecting one or more individual pieces cut from the composite material into the mold. A composite injection molding method characterized by integrally molding a resin and a metal. (2) Supplying two or more composite materials such as thin plates to the molding die,
One or more of the composite materials are cut with a punch that constitutes a capity and/or a core in a part of the mold, and one or more individual pieces are cut from one or more of the composite materials. A composite injection molding method, characterized in that the uncut composite material and the resin or metal injected into the mold are integrally molded.