JP2007008077A - Resin joined body and its joining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin joined body consisting of two or more thermoplastic resin sections without using an adhesive by a simple method not requiring continuous complicated processes and thereby capable of attaining the remarkably higher joining strength compared with conventional joining techniques, and its joining method. <P>SOLUTION: In the resin joined body consisting of the two or more thermoplastic resin sections joined between which sheets of metal having protrusions/recesses are made to be placed and its joining method, the protrusions/recesses are arranged on both surfaces of the sheet metal, and the resin sections are injection molded to the individual surfaces of the metal sheet arranged beforehand in a mold. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a joined body composed of a plurality of resin parts and a joining method thereof, and more particularly, to a joined body in which a metal thin plate having uneven portions is interposed between resin parts to be joined and a joining method thereof.

  As a conventional technique for joining a plurality of resin parts, in particular, a thermoplastic resin part, a method of joining using an adhesive has been often employed. However, in this method, in order to enhance the adhesive effect of the adhesive, the process of surface treatment of the adhesive surface, application and drying of the adhesive, assembly of the thermoplastic resin part to be joined, heating, cooling and curing are complicated. Therefore, it was extremely inefficient in terms of processing cost, energy, and the like.

  On the other hand, in Patent Document 1, a metal plate having a concave portion on the surface is disposed between the thermoplastic resin portions to be joined, and the resin melted by the high frequency induction heat treatment is melted into the concave portion, whereby both resin portions are provided. A technique for securely joining is disclosed. However, in this method, a thermoplastic resin part is injection molded in advance, the resin parts are assembled together with a metal plate provided with a recess on the surface, a high frequency induction heating process is performed, and cooling and curing are performed. There was a problem similar to the method using the above-mentioned adhesive such that the process becomes complicated.

JP 2004-52993 A

  The present invention is intended to solve the above-described problems of the prior art, and it is remarkably compared with the conventional joining technique by a simple method that does not use an adhesive and does not require a continuous complicated processing step. An object of the present invention is to provide a joined body composed of a plurality of thermoplastic resin portions that can obtain high joining strength and a joining method thereof.

  The resin joined body according to claim 1 is a resin joined body composed of a plurality of the resin portions in which metal thin plates having uneven portions are interposed between the resin portions to be joined, and the uneven portions are formed on the metal thin plates. It is arranged on both surfaces.

  Since the present invention is configured as described above, the resin of the resin parts connected to each other is integrated with the concavo-convex parts formed on the respective surfaces of the opposing metal thin plates and anchors on both sides of the metal thin plates. By forming the portion, there is an effect that it is possible to provide a resin bonded body bonded extremely firmly as compared with the prior art.

  According to a second aspect of the present invention, preferably, the resin portion is a resin portion that is injection-molded with respect to each surface of the metal thin plate previously disposed in a mold.

  Since the present invention is configured as described above, since the resin in the resin portion can penetrate into the concavo-convex portion simultaneously with the injection molding of the resin portion, the anchor portion can be formed. There is an effect that it is possible to provide a joined body that is firmly joined by an extremely simple method.

  As in the invention of claim 3, preferably, the uneven portion has a diameter of 0.01 to 10 μm and a height of 0.1 to 100 μm.

  Since this invention is comprised as mentioned above, it penetrate | invaded in the uneven | corrugated | grooved part which the diameter formed in both surfaces of the metal thin plate is 0.01-10 micrometers, and the height is 0.1-100 micrometers. Since the resin is solidified and the two resin parts are joined together, the bonding area between the two resin parts is significantly larger compared to a metal member that is simply provided with holes or grooves. Compared to the above, an effect is obtained that an extremely high adhesive strength can be obtained.

  The resin bonding method according to claim 4 is a resin bonding method in which a plurality of the resin parts are joined by interposing a metal thin plate having uneven parts between the resin parts to be joined. It is arranged on the surface.

  Since the present invention is configured as described above, the resin of the resin parts connected to each other is integrated with the concavo-convex parts formed on the respective surfaces of the opposing metal thin plates and anchors on both sides of the metal thin plates. By forming the portion, it is possible to obtain an effect that a very strong bonding strength can be obtained as compared with the prior art.

  According to a fifth aspect of the present invention, preferably, the resin portion is a resin portion that is injection-molded with respect to each surface of the metal thin plate previously disposed in a mold.

  Since the present invention is configured as described above, since the resin in the resin portion can penetrate into the concavo-convex portion simultaneously with the injection molding of the resin portion, the anchor portion can be formed. In this way, an extremely high bonding strength can be obtained by a very simple method as compared with the prior art.

  As in the invention of claim 6, preferably, the uneven portion has a diameter of 0.01 to 10 μm and a height of 0.1 to 100 μm.

  Since this invention is comprised as mentioned above, it penetrate | invaded in the uneven | corrugated | grooved part which the diameter formed in both surfaces of the metal thin plate is 0.01-10 micrometers, and the height is 0.1-100 micrometers. Since the resin is solidified and the two resin parts are joined together, the bonding area between the two resin parts is significantly larger compared to a metal member that is simply provided with holes or grooves. Compared to the above, an effect is obtained that an extremely high adhesive strength can be obtained.

  An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is an image diagram showing a first embodiment of the present invention, and FIG. 2 is an image diagram showing a second embodiment of the present invention.

  A first embodiment of the present invention will be described with reference to FIG. FIG. 1 (a) shows that the diameter is 0.01 to 10 μm and the height is 0.1 to 100 μm on both surfaces of the metal thin plate 1 by a known method such as sand blasting, etching and anodizing treatment. The process of forming the uneven portion 1 ′ in advance is shown. The metal thin plate 1 whose both surfaces are processed to be uneven is disposed in advance in an injection mold, and the thermoplastic resin is injection-molded onto one surface of the metal thin plate 1 in the step of FIG. One thermoplastic resin portion 3 is formed. Next, in the process of FIG. 1C, the second thermoplastic resin portion 4 is formed by injection molding of the thermoplastic resin on the other surface of the metal thin plate 1 by the same method.

  The thermoplastic resin joined body 6 joined in this way is obtained by forming the first thermoplastic resin portion 3 and the second thermoplastic resin portion 4 so that the injection-molded thermoplastic resin is formed on both surfaces of the metal thin plate 1. The thermoplastic resin and the concavo-convex part 1 ′ are integrated to form an anchor part by joining into the voids of the concavo-convex part 1 ′ formed on the substrate and cooling and solidifying. In particular, the diameter formed on both surfaces of the metal thin plate is 0.01 to 10 μm, and the resin that has permeated into the concavo-convex portion whose height is 0.1 to 100 μm is solidified and joined. Since the bonding area between the resin parts is remarkably increased as compared with the case where the metal member is simply provided with a hole or a groove, the effect is obtained that a remarkably high bonding strength can be obtained as compared with the prior art. In addition, it is possible to obtain an extremely high bonding strength as compared with the prior art by a very simple method without requiring a complicated process as in the prior art.

  In the embodiment shown in FIG. 1, the injection molding of the first thermoplastic resin portion 3 and the second thermoplastic resin portion 4 is performed by first performing the injection molding of the first thermoplastic resin portion 3. Subsequently, although the injection molding of the second thermoplastic resin portion 4 is performed, the injection molding of the first thermoplastic resin portion 3 and the second thermoplastic resin portion 4 may be simultaneously performed at once.

  Based on FIG. 2, a second embodiment of the present invention will be described. FIG. 2A shows a range in which the diameter is 0.01 to 10 μm and the height is 0.1 to 100 μm on both surfaces of the thin metal plates 1 and 2 by a known method such as sandblasting, etching, and anodizing. This shows a step of previously forming the concavo-convex portions 1 ′ and 2 ′. The metal thin plates 1 and 2 whose both surfaces are processed to be uneven are disposed in advance in an injection mold, and the thermoplastic resin is placed below the metal thin plate 1 and above the metal thin plate 1 in the step of FIG. The first, second and third thermoplastic resin portions 3, 4 and 5 are formed by injection molding on the left side of the thin metal plate 2, the upper side of the thin metal plate 1, and the right side surface of the thin metal plate 2. . Here, the first, second, and third thermoplastic resin portions 3, 4, and 5 may be formed by sequentially performing injection molding in the same manner as in the first embodiment, but may be simultaneously injected at a time. It is good also as forming.

  In the thermoplastic resin joined body 7 thus joined, when the first, second and third thermoplastic resin portions 3, 4 and 5 are formed, the injection-molded thermoplastic resin is formed of the metal thin plates 1 and 2. The thermoplastic resin and the concavo-convex portions 1 ′ and 2 ′ are integrated to form an anchor portion by penetrating into the gaps between the concavo-convex portions 1 ′ and 2 ′ formed on both surfaces of Be joined. In particular, the thermoplastic resin that has penetrated into the concavo-convex portion having a diameter of 0.01 to 10 μm and a height of 0.1 to 100 μm formed on both surfaces of each thin metal plate is solidified and joined. Compared to a metal member that is simply provided with holes or grooves, the bonding area between the resin parts is remarkably large, so that it has the effect that a significantly higher bonding strength can be obtained compared to the prior art. It is. In addition, it is possible to obtain an extremely high bonding strength as compared with the prior art by a very simple method without requiring a complicated process as in the prior art.

FIG. 1 is an image diagram showing a first embodiment of the present invention. FIG. 2 is an image diagram showing a second embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st metal thin plate 1 'Concavity and convexity part of 1st metal thin plate 2 2nd metal thin plate 2' Concavity and convexity part of 2nd metal thin plate 3 1st resin part 4 2nd resin part 5 3rd resin part 6 resin melt penetration part 7 thermoplastic resin joined body (first embodiment)
8 Thermoplastic resin joined body (second embodiment)

Claims (6)

  In the resin joined body constituted by a plurality of the resin parts in which a metal thin plate having an uneven part is interposed between the resin parts to be joined, the uneven part is disposed on both surfaces of the metal thin plate. A resin joined body.   The resin joined body according to claim 1, wherein the resin portion is a resin portion that is injection-molded with respect to each surface of the thin metal plate previously disposed in the mold.   3. The resin joined body according to claim 1, wherein the uneven portion has a diameter of 0.01 to 10 μm and a height of 0.1 to 100 μm.   In the resin bonding method of joining a plurality of the resin parts by interposing a metal thin plate having uneven parts between the resin parts to be joined, the uneven parts are disposed on both surfaces of the metal thin plate. Resin bonding method.   The resin bonding method according to claim 4, wherein the resin portion is a resin portion that is injection-molded with respect to each surface of the thin metal plate previously disposed in the mold.   6. The resin bonding method according to claim 4, wherein the uneven portion has a diameter of 0.01 to 10 μm and a height of 0.1 to 100 μm.

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