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Method for joining synthetic resin to metallic plate

A technology of synthetic resin and metal plate, applied in the direction of coating, etc., can solve the problems of easy peeling and achieve the effect of simple regeneration cycle

Inactive Publication Date: 2002-03-06
TAMURA KK +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the case of using the above-mentioned adhesive, not only the synthetic resin-based adhesive to be used must have affinity for both sides of the metal plate and the synthetic resin, but also many steps such as application, bonding, and drying of the adhesive are required. There is a problem with the processing procedure
[0004] In addition, in the method of inserting a metal plate during injection molding, in the case of the structure in which the metal plate is embedded in the synthetic resin for the purpose of auxiliary reinforcement, there are not many problems, but in the case of only bonding, due to the metal plate and the synthetic resin The difference in thermal expansion of the resin, etc., is easy to peel off, and there is a problem

Method used

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  • Method for joining synthetic resin to metallic plate
  • Method for joining synthetic resin to metallic plate
  • Method for joining synthetic resin to metallic plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] use Figure 1(a) to Figure 1(d) Examples of the present invention will be described.

[0058] As shown in FIG. 1( a ), an injection molding mold 10 of synthetic resin is prepared in which an upper mold 1 and a lower mold 2 form a cavity 3 in a product shape.

[0059] A metal plate 4 is attached to the upper die 1 side of the injection molding die 10 . The modified embodiment uses a metal hemisphere made of metal pressing as the metal plate 4 .

[0060] The central portion of the convex portion of the upper mold 1 is provided with a suction cavity 32, which is connected to an external vacuum pump 31 by a hose 33 as shown in FIG. 1(a). To the installation of the metal plate 4 of the injection molding mold 10 as shown in Fig. This can be done simply with air pressure. Doing this will not cause the metal plate 4 to fall from the upper mold 1 .

[0061] On the peripheral portion of the metal plate 4, there is provided a bent portion 5 bent toward the side where the synt...

Embodiment 2

[0067] use Figure 2(a) ~ Figure 2(c) Another example of the present invention will be described.

[0068] The injection molding die 10 is formed by the upper mold 1 and the lower mold 2 . In the injection molding die 10 is mounted a metal plate 16 that is pressed into a box shape. In addition, the mounting means of the metal plate 16 using air pressure explained in FIG. 1( a ) is omitted in FIG. 2( a ).

[0069] In this embodiment, the injection molding mold 10 is formed by the upper mold 1 and the lower mold 2 to form the cavity 3. At the same time, the upper mold 1 is provided with a mold for deforming to a concave-convex curved surface on a part other than the peripheral portion of the metal plate 16. Cavity 3b. The cavity 3 b is a molding cavity for absorbing deformation of the bottom surface portion 16 a of the metal plate 16 caused by the pressure of the synthetic resin when the synthetic resin 20 is injected into the injection mold 10 .

[0070] A folded portion 16...

Embodiment 3

[0075] Another example of a bonded product of a metal plate and a synthetic resin produced by the method described in the above-mentioned Examples 1 and 2 is shown with reference to FIGS. 7( a ) to 7 ( c ).

[0076] FIG. 7( a ) shows that contrary to what was described in Embodiments 1 and 2, a synthetic resin 20 is adhered to the inner side of the outer metal plate 16 .

[0077] Fig. 7(b) is the same as that described in Embodiments 1 and 2. The synthetic resin 20 is adhered to the outside of the inner metal plate 16, but rubber, glass, etc. are interposed between the metal plate 16 and the synthetic resin 20 as other components 34. , ceramics, waste plastics, etc. FIG. 7( c ) is the same as FIG. 7( a ) where synthetic resin 20 is bonded to the inside of the outer metal plate 16 , and other components 34 such as rubber are interposed between the metal plate 16 and the synthetic resin 20 .

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Abstract

A method for producing a product where a synthetic resin film is joined to a metallic plate and hardly separates from the metallic plate effectively. A metallic plate is mounted in an injection mold for injecting synthetic resin thereinto, and a synthetic resin is injected into the mold to join a synthetic resin film to the metallic plate. A curling part or fold-back part is provided to the periphery of the metallic plate. By making use of the foaming and expansion or of the curing and shrinkage of the synthetic resin forced into the curling or fold-back part, the join of the synthetic resin to the metallic plate is strengthened. A metallic plate and a thermoplastic synthetic resin molded piece each having a similar mutual contact face are prepared, the thermoplastic synthetic resin molded piece is pressed to the heated metallic plate, and a synthetic resin film is strongly joined to the metallic plate by making use of the melt, curing, and shrinkage of the contact face of the thermoplastic synthetic resin molded piece.

Description

technical field [0001] The present invention relates to a method for bonding a synthetic resin and a metal plate, and more particularly to a method for bonding a synthetic resin and a metal plate which can realize a firm bonded state between the synthetic resin and the metal plate. Background technique [0002] Conventionally, a method using an adhesive is known for bonding a metal plate to a synthetic resin product. There is also a method of inserting a metal plate during injection molding of synthetic resin. [0003] In the case of using the above-mentioned adhesive, not only the synthetic resin-based adhesive to be used must have affinity for both sides of the metal plate and the synthetic resin, but also many steps such as application, bonding, and drying of the adhesive are required. There is a problem with the processing procedure. [0004] In addition, in the method of inserting a metal plate during injection molding, in the case of the structure...

Claims

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Application Information

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IPC IPC(8): B29C45/14B29C65/46
CPCB29C66/742B29C65/46B29C66/74281B29C66/545B29K2995/0026B29C66/30325B29C65/44B29C45/14311B29C45/14196B29C66/7422B29C66/30321B29K2705/00B29C66/7392B29C66/1122B29C66/71B29C66/8322B29K2023/06B29K2023/12B29C45/14
Inventor 田村树
Owner TAMURA KK