JPS5930539B2 - molding mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a concavo-convex portion 2 at a joint 5 between an upper mold 3 and a lower mold 4 to obtain a metal forming plate 1 having a desired shape, and A space 6 for integrally molding the resin 11 at an arbitrary location of the molding plate 1 between the molding plate 1 and the joint portion 5 is provided between the molding plate 1 and the joint portion 5, and a resin injection passage T leading to the space 6 is provided.
This relates to a molding die characterized in that it is provided on at least one of the upper mold 3 and the lower mold 4.

It is an object of the present invention to provide a molding die that greatly simplifies the process of integrally molding resin at any location on a metal molding plate, reduces costs, and improves the accuracy of finished products. It is on offer.

Conventionally, when pressing a metal plate into a predetermined shape and integrally molding resin at any part of the metal molded plate,
First, a metal plate was processed in a separate process, and the resulting molded plate was then incorporated into a mold in the next molding process to integrally mold the resin.

In such a conventional example, the first step for processing the metal plate and the second step for integrally molding the resin are required, and the number of steps is two.
In addition to making the process more complicated, molding molds are required for both processes, which increases the number of parts and increases costs.In addition, when molding with resin, if the dimensional accuracy of the mold is poor, the resin may damage the molding plate. The problem was that it could get stuck between the mold and the metal mold, leading to a decline in quality. The present invention has been provided to solve the drawbacks of the above-mentioned conventional examples, and one embodiment thereof is shown in FIGS. 1 and 2.

A plurality of uneven portions 2 having an appropriate shape depending on the purpose are provided on each joint portion 5 of the upper die 3 and the lower die 4 for constructing the molding die, and the uneven portions 2 are configured as follows. has been done.
(" is an uneven part 2 for obtaining a cut and raised shape as shown in Fig. 2, (opening) is an uneven part 2 for obtaining a counter shape,
(The ridges are the concave and convex portions 2 for obtaining a drawing shape, the eyes are the concave and convex portions 2 for obtaining a bent shape, and the convex portions are in the upper die 3 and the lower die 4
A recess is provided in each. Resin 11 on molding plate 1
A plurality of spaces 6 for integrally molding are provided in the joint part 5 of the upper mold 3 so as to open toward the joint part 5 side of the lower mold 4,
A resin injection passage 7 communicating with these spaces 6 is provided in the upper mold 3. Next, to explain the operation, first, the flat metal plate 8
The metal plate 8 is set by fitting the set pin 10 provided in the joint part 5 of the lower mold 4 into the set hole 9 provided in the lower die 4.

Thereafter, when the upper die 3 and the lower die 4 are brought into close contact with each other under a predetermined pressure, the metal plate 8 is formed by the uneven portions 2 as shown in FIG. 2, and a formed plate 1 having the desired shape is obtained. It will be done.
Thereafter, molten synthetic resin is injected into each space 6 through the resin injection passage 7 and cooled, so that the resin 11 is integrally molded at a predetermined location on the molding plate 1. 3 and 4 are explanatory cross-sectional views for comparing the conventional example and the present invention, showing the base parts of the smoke detector, FIG. 3 is the conventional example, and FIG. 4 is the present invention. An example of this is shown.

In the conventional example, as described above, the forming plate 1 is
and the molded resin 18 are manufactured in separate processes, and then the molded plate 1 is assembled into the molded resin 18. 12 is a mounting bracket 13
This is a screw for fixing the molded resin 18 and the molded resin 18 with the nut 14.

15 is an electronic part fixed to the hole 16 of the molded plate 1 with an adhesive.

17 is a metal component 17 fixed to the molded plate 1 by welding.

In this embodiment shown in FIG. 4, the molded plate 1 and the molded resin 18 are integrally molded in one step, and the mounting bracket 13 is fixed by using the tip of the counter-shaped portion 19 formed in a part of the molded plate 1. The electronic part 15 is fixed by caulking, and the electronic part 15 is attached to another counter-shaped part 20 of the molded plate 1.
It is press-fitted into place.

Further, the cut and raised portion 21 of the molded plate 1 also serves as the metal component 17. As described above, this embodiment eliminates the need for complicated processes such as screw tightening, bonding, and welding. Since the present invention is configured as described above, the metal plate can be formed into a molded plate of a desired shape by interposing the flat metal plate at the joint between the upper mold and the lower mold and pressing the metal plate. In addition, by injecting resin into the space, it is possible to integrally mold the resin into the molding plate, and the sheet metal process and resin molding process can be performed in one process, simplifying the process and making manufacturing easier. In addition, only one set of upper mold and lower mold is required, and the number of parts is 1.
Even if the dimensional accuracy of the joint between the upper and lower molds is somewhat poor, there will be no undesirable gaps between the molding plate and the upper and lower molds. Therefore, during integral molding of the resin, it is possible to prevent the resin from flowing to other parts as much as possible, thereby increasing the accuracy of the finished product.

[Brief explanation of the drawing]

1 and 2 are partial cross-sectional views of an embodiment of the present invention, with FIG. 1 showing the state before molding and FIG. 2 showing the state after molding. 3 and 4 are comparative cross-sectional views of products formed by a conventional molding die and a molding die according to an embodiment of the present invention, FIG. 3 is a conventional example, and FIG. 4 is a case of the present invention. It shows. 1
is a molding plate, 2 is an uneven part, 3 is an upper mold, 4 is a lower mold, 5
6 is a joint, 6 is a space, 7 is a resin injection passage, and 11 is a resin.

Claims (1)

[Claims] 1 An uneven part is provided at the joint between the upper mold and the lower mold to obtain a metal molded plate of the desired shape, and a resin is integrally molded at any part of the molded plate between the upper mold and the lower mold. A molding die characterized in that a space is provided between a molding plate and a joint, and a resin injection passage leading to the space is provided in at least one of the upper mold and the lower mold.