JP2016078283A - Metal-resin composite and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal-resin composite in which the generation of strain and residual stress in a resin molded body is prevented, and further, the resin molded body is not deformed.SOLUTION: Provided is a metal-resin composite 5 containing: a metallic member 1; a resin molded body 2; and a joining part 3 of joining the metallic member and the resin molded body. The joining part has: a metal joined layer 30 having the first surface roughened part 30A at the side of the resin molded body, and in which the first surface roughened part is buried with the resin material of a resin molded body so as to be joined with the resin molded body; and a low melting point joining layer 31 made of the material having a melting point lower than that of the resin material of the resin molded body and joining the metal joining layer and the metallic member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a metal-resin composite and a method for producing the same.

Generally, when producing a composite part of metal and resin, insert molding is used in which the metal is placed in a mold and the resin is injected there.
Further, when the hollow member is formed by joining the first member made of a metal material and the second member made of a resin material, the resin material is covered so as to cover the flange portion of the first member and the flange portion of the second member. There is also a technique of forming a joining member made of and welding the second member and the joining member.

  When manufacturing a composite hollow container in which a resin member and a metal member are joined, heat is applied to the butt portion between the thermoplastic resin layer and the resin member while the metal member with the thermoplastic resin layer and the resin member are abutted. There is also a technique of generating and welding.

JP 60-129224 A JP 2001-277284 A JP 2014-79975 A

  By the way, when a metal member and a resin molded body are joined to produce a metal-resin composite, when the resin molded body is joined by welding, the resin molded body is heated in the vicinity of the joint, while the other parts are heated. The part is hardly heated. For this reason, temperature distribution occurs in the resin molded body, and strain and residual stress due to the difference in thermal expansion occur. As a result, peeling may occur at the joint after a certain period of time, or cracks may occur in the resin molded body.

In addition, when the resin molded body is bonded by welding, if the vicinity of the bonded portion is pressed in a heated state, the resin molded body may be softened and deformed.
Therefore, it is desirable to prevent distortion and residual stress from being generated in the resin molded body and to prevent the resin molded body from being deformed.

  The metal-resin composite includes a metal member, a resin molded body, and a joint portion that joins the metal member and the resin molded body, and the joint portion has a first surface roughened portion on the resin molded body side. A metal bonding layer in which the resin material of the resin molded body is embedded in the first surface roughened portion and bonded to the resin molded body, and a material having a melting point lower than that of the resin material of the resin molded body. A low melting point bonding layer for bonding the layer and the metal member.

  The manufacturing method of the present metal-resin composite is a method of manufacturing a metal-resin composite by joining a metal member and a resin molded body through a joint, and one of the metal joint layers to be the joint Forming a resin molded body in which a metal bonding layer is bonded so that a resin material for forming the resin molded body is embedded in the first surface roughened portion provided on the side, and a resin to be a bonded portion A step of joining the metal member and the metal joining layer joined to the resin molded body with a low melting point joining layer made of a material having a melting point lower than that of the resin material of the molded body.

  Therefore, according to the present metal-resin composite and its manufacturing method, there are advantages that distortion and residual stress are not generated in the resin molded body and that the resin molded body can be prevented from being deformed.

(A), (B) is a schematic diagram which shows the structure of the metal-resin composite concerning 1st Embodiment, (A) is a perspective view, (B) is a cross section which follows an AA line. FIG. (A)-(G) are typical sectional drawings for demonstrating the manufacturing method of the metal-resin composite concerning 1st Embodiment. It is typical sectional drawing for demonstrating the manufacturing method of the metal-resin composite concerning 1st Embodiment. It is typical sectional drawing for demonstrating the subject of a metal-resin composite. It is typical sectional drawing for demonstrating the subject of a metal-resin composite. It is typical sectional drawing for demonstrating the subject of a metal-resin composite. (A), (B) is a schematic diagram which shows the structure of the metal-resin composite concerning 2nd Embodiment, (A) is a perspective view, (B) is a cross section which follows an AA line. FIG. (A)-(D) are typical sectional drawings for demonstrating the manufacturing method of the metal-resin composite concerning 2nd Embodiment. (A)-(D) are typical sectional drawings for demonstrating the manufacturing method of the metal-resin composite concerning 2nd Embodiment.

Hereinafter, a metal-resin composite according to an embodiment of the present invention and a method for producing the same will be described with reference to the drawings.
[First Embodiment]
First, the metal-resin composite according to the first embodiment and the manufacturing method thereof will be described with reference to FIGS.

The metal-resin composite according to this embodiment is a metal-resin composite in which a metal member and a resin molded body are joined. As shown in FIGS. 1 (A) and 1 (B), the metal member 1 And a resin molded body 2 and a joint portion 3 that joins the metal member 1 and the resin molded body 2 to each other. The metal member 1 is also referred to as a metal part. The composite is also referred to as a composite part.
In the present embodiment, for example, the resin molded body 2 is a lid-shaped resin molded body having a base portion 2A and a frame-shaped side wall portion 2B, and an end portion of the frame-shaped side wall portion 2B so that the hollow portion 4 is formed. Is joined to the metal member 1 via the joint 3.

  In this way, the metal-resin composite 5 in which the end of the frame-shaped side wall 2B of the lid-shaped resin molded body 2 is joined to the metal member 1 via the joint 3 has the hollow part 4. . The metal-resin composite 5 having such a hollow portion 4 is used as a water-cooled cooling plate for cooling a heat-generating component such as a CPU, for example. In this case, the metal member 1 constituting the metal-resin composite 5 is thermally connected to a heat-generating component such as a CPU. Then, when cooling water flows through the hollow portion 4, for example, a heat generating component such as a CPU is cooled via the metal member 1. In general, a water-cooled cooling plate for cooling a heat-generating component such as a CPU is made of a metal material having a good thermal conductivity such as copper. By replacing the portion with a resin material, the weight can be reduced.

Note that a heat generating component such as a CPU is provided in a semiconductor package, for example. For this reason, the water-cooled cooling plate is used, for example, to cool a heat generating component provided in a semiconductor package or the like. The heat generating component is also referred to as a heat generating electronic component.
Here, the metal member 1 consists of metal materials, such as copper, for example.
The resin molded body 2 is made of a resin material such as polyphenylene sulfide (PPS). Here, the melting point (melting temperature) of polyphenylene sulfide (PPS) is about 280 ° C.

Further, the bonding portion 3 includes a metal bonding layer 30 and a low melting point bonding layer 31.
The metal bonding layer 30 has the first surface roughened portion 30A on the resin molded body 2 side, and the resin material of the resin molded body 2 is embedded in the first surface roughened portion 30A. It is joined. That is, the resin material of the resin molded body 2 is embedded in the minute irregularities formed in the first surface roughened portion 30A of the metal bonding layer 30, and the metal bonding layer 30 and the resin molded body 2 are formed by a so-called anchor effect. Are joined with good strength (anchor joining). In FIG. 1A, the first surface roughening portion 30A is not shown.

The low melting point bonding layer 31 is made of a material having a melting point lower than that of the resin material of the resin molded body 2, and bonds the metal bonding layer 30 and the metal member 1.
In the present embodiment, the low melting point bonding layer 31 is a resin bonding layer 31X made of a resin material having a melting point lower than that of the resin material of the resin molded body 2. That is, the melting point of the resin material of the resin bonding layer 31 </ b> X is lower than the melting point of the resin material of the resin molded body 2. In addition, the melting point of the resin material of the resin molded body 2 is lower than the melting point of the metal material constituting the metal member 1 or the metal bonding layer 30.

  For this reason, the metal bonding layer 30 has the second surface roughened portion 30B on the resin bonding layer 31X side, and the resin material of the resin bonding layer 31X is embedded in the second surface roughened portion 30B so that the resin bonding layer 31X. It is joined with. That is, the resin material of the resin bonding layer 31X is embedded in minute irregularities formed in the second surface roughened portion 30B of the metal bonding layer 30, and the metal bonding layer 30 and the resin bonding layer 31X are formed by a so-called anchor effect. Are joined with good strength.

  The metal member 1 has a surface roughened portion 1A, and the resin material of the resin bonding layer 31X is embedded in the surface roughened portion 1A and bonded to the resin bonding layer 31X. Here, the metal member 1 includes a resin molded body 2 (here, an end portion of the frame-shaped side wall portion 2B) joined through the joint portion 3 (resin molded body joined region), that is, a resin joined layer 31X. The surface roughened portion 1A is provided at the joint portion. Then, the resin material of the resin bonding layer 31X is embedded in minute irregularities formed in the surface roughened portion 1A of the metal member 1, and the metal member 1 and the resin bonding layer 31X have good strength due to a so-called anchor effect. It comes to be joined with.

  Thus, in the present embodiment, the low melting point bonding layer 31 is the resin bonding layer 31X, and the upper and lower surfaces of the metal bonding layer 30 and the upper surface of the metal member 1 (in this case, the resin molded body bonding region) are roughened. Thus, the surface roughened portions 30A, 30B, 1A (roughened surface portion; metal roughened surface) having minute irregularities are formed. Thereby, the surface roughened portions 30A, 30B, at the interfaces (respective bonding surfaces) of the resin molded body 2 and the metal bonding layer 30, the metal bonding layer 30 and the resin bonding layer 31X, and the resin bonding layer 31X and the metal member 1, By embedding a resin material in 1A, it is joined with a good strength by a so-called anchor effect. Thereby, when it uses for a water-cooling cooling plate, for example, favorable joint strength and watertightness are realizable.

  Here, the metal bonding layer 30 is made of, for example, copper (Cu), copper alloy (brass, bronze, etc.), aluminum (Al), aluminum alloy, nickel (Ni), stainless steel (SUS), steel material (carbon steel, alloy steel). Etc.) and a metal plate (metal film) made of a metal material. The metal member 1 uses a material having a high thermal conductivity, whereas the metal bonding layer 30 does not necessarily need to use a material having a high thermal conductivity, and can form the roughened surfaces 30A and 30B. Any material can be used. And the metal plate which comprises the metal joining layer 30 is surface-roughened by the dipping process using etching liquid, for example, and both surfaces are roughened. In addition, the thickness of the metal bonding layer 30 is desirably as thin as possible. However, since it is necessary to have a thickness greater than the height of the unevenness of the surface roughened portions 30A and 30B, for example, about 10 μm to about 1000 μm. . Further, the surface roughness (arithmetic surface roughness) Ra of the metal bonding layer 30 is about 0.5 μm to about 10 μm. The surface roughness of the metal bonding layer 30 can be adjusted by the dip time.

The resin bonding layer 31X is made of a resin material such as polypropylene (PP). Here, the melting point of polypropylene (PP) is about 165 ° C. Thus, the resin material of the resin bonding layer 31 </ b> X uses a material having a lower melting point than the resin material of the resin molded body 2. The thickness of the resin bonding layer 31X is, for example, about 10 μm to about 1000 μm.
Further, the metal member 1 is subjected to a surface roughening process by a dipping process using an etchant, for example, in a state where only the area to be the surface roughening portion 1A is opened and the other areas are masked, A surface roughening portion 1A is provided. Further, the surface roughness (arithmetic surface roughness) Ra of the surface roughened portion 1A of the metal member 1 is about 0.5 μm to about 10 μm. The surface roughness can be adjusted by the dip time.

  Here, dipping is used as a method of roughening both surfaces of the metal bonding layer 30 and the upper surface of the metal member 1, that is, a surface roughening method, but is not limited thereto. Sand blasting, laser etching, electric discharge machining, etc. can also be used. For example, when surface roughening is performed by sandblasting, the surface roughness (arithmetic surface roughness) Ra is about 0.1 μm to 20 μm. Further, for example, when the surface is roughened by laser etching, the surface roughness (arithmetic surface roughness) Ra is about 0.1 μm to 20 μm. For example, when surface roughening is performed by electric discharge machining, the surface roughness (arithmetic surface roughness) Ra is about 1 μm to 50 μm.

By the way, the reason why the above configuration is adopted is as follows.
The specific gravity of the resin material is smaller than that of the metal material, and weight reduction can be achieved by replacing a part of the metal material with the resin material. As in this embodiment, the water-cooled cooling plate, which is partly made of resin by using a metal-resin composite to reduce the weight, has a hollow portion serving as a flow path for cooling water inside, so it can withstand water pressure. It is necessary to bond the resin and the metal so that good strength and water tightness can be obtained.

When producing a composite part of metal and resin, insert molding in which the metal is placed in a mold and the resin is injected there may be used. In the metal-resin composite having), insert molding as described above is difficult.
In addition, when manufacturing a metal-resin composite in which a metal member and a resin molded body are bonded, when the resin molded body is bonded by welding, the resin molded body is heated in the vicinity of the bonded portion, while other Since the portion is hardly heated, a temperature distribution is generated in the resin molded body, and strain and residual stress due to the difference in thermal expansion occur. As a result, peeling may occur at the joint after a certain period of time, or cracks may occur in the resin molded body.

Further, when the resin molded body is bonded by welding, there is a possibility that the resin molded body may be softened and deformed if the vicinity of the bonded portion is pressed in a heated state.
It is also conceivable to form a metal-resin composite by joining and integrating a molded resin molded body and a metal member by thermocompression bonding.
In this case, for example, as shown in FIG. 4, the resin molded body 100 is disposed on the metal member 101, the metal member 101 is heated by the heater 103, and the resin molded body 100 is pressed by the load jig 103 with a certain load. Press (press) 101. Thereby, the resin molding 100 and the metal member 101 can be bonded by thermocompression bonding.

  However, at the time of such thermocompression bonding, the resin molded body 100 is heated near or above the melting temperature of the resin material in the vicinity of the bonding portion (portion in contact with the metal member 101), In other parts (for example, the part where the pressurizing jig 103 contacts), it is hardly heated. For this reason, a temperature distribution is generated in the resin molded body 100, and strain and residual stress (residual internal stress) due to thermal expansion difference are generated. Due to such strain and residual stress, the metal-resin composite may peel off at a joint after a certain period of time, or the resin molded body 100 may be cracked.

In this case, as shown in FIG. 5, for example, the resin molded body 100 is arranged on the metal member 101 so that the temperature distribution does not occur in the resin molded body 100, and the entire resin molded body 100 is heated uniformly. However, it is conceivable to press the resin molded body 100 against the metal member 101 with the upper and lower pressure jigs 103.
However, since the resin molded body 100 is heated near or above the melting temperature of the resin material and pressed in that state, the resin molded body may be softened and deformed.

For this reason, it is desirable that only the joint portion of the resin molded body is melted and joined.
Thus, for example, as shown in FIG. 6, it is conceivable to form the resin molded body 100 from two or more types of resin materials having different melting points. In other words, it is conceivable that the resin molded body 100 is formed with the resin material 100A having a relatively low melting point at the joint portion with the metal member 101 and the resin material 100B having a relatively high melting point at the other portion. Then, the entire resin molded body 100 is uniformly heated at a temperature equal to or higher than the melting point of the relatively low melting point resin material 100A and lower than the melting point of the relatively high melting point resin material 100B, and pressed in that state. It is conceivable to perform thermocompression bonding.

  In this case, only the resin material 100 </ b> A having a relatively low melting point is melted and joined to the metal member 101. In this way, by uniformly heating the entire resin molded body 100 and performing thermocompression bonding, the temperature distribution in the resin molded body 100 can be prevented from occurring. That is, thermocompression bonding can be performed without generating strain and residual stress due to the temperature distribution generated in the resin molded body 100. Further, in this way, only the relatively low melting point resin material 100A constituting the resin molded body 100 is melted and thermocompression bonded so that the resin molded body 100 is not softened and deformed. can do.

However, when the resin molded body 100 is formed by bonding two or more types of resin materials, there are cases where good bonding strength cannot be obtained when bonding different resin materials. For example, depending on the combination of resin materials, the bonding strength may be low, and bonding may not be possible.
In view of this, the above-described configuration is employed so that a good bonding strength can be obtained while preventing distortion and residual stress from being generated in the resin molded body and preventing the resin molded body from being deformed.

Next, a method for producing the metal-resin composite according to the present embodiment will be described with reference to FIGS.
As shown in FIGS. 2 and 3, the metal-resin composite manufacturing method of the present embodiment joins the metal member 1 and the resin molded body 2 via the joint portion 3 to form the metal-resin composite 5. In the manufacturing method, the step of forming the resin molded body 2 to which the metal bonding layer 30 is bonded, and the metal bonding layer 30 and the metal member 1 bonded to the resin molded body 2 by the low melting point bonding layer 31 are bonded. Including the step of.

Here, in the step of forming the resin molded body 2 to which the metal bonding layer 30 is bonded, the resin molded body 2 is provided on the first surface roughening portion 30A provided on one side of the metal bonding layer 30 to be the bonding portion 3. The resin molded body 2 to which the metal bonding layer 30 is bonded is formed so that the resin material for forming the metal is embedded.
In the step of joining the metal bonding layer 30 and the metal member 1 bonded to the resin molded body 2 with the low melting point bonding layer 31, a material having a melting point lower than that of the resin material of the resin molded body 2 that becomes the bonding portion 3. The metal bonding layer 30 bonded to the resin molded body 2 and the metal member 1 are bonded by the low melting point bonding layer 31 made of

  In the present embodiment, in the step of forming the resin molded body 2 to which the metal bonding layer 30 is bonded, the metal bonding having the base portion 2A and the frame-like side wall portion 2B as the resin molded body 2 and serving as the bonding portion 3 The metal bonding layer 30 is bonded to the end portion of the frame-shaped side wall portion 2B so that the resin material for forming the resin molded body 2 is embedded in the first surface roughened portion 30A provided on one side of the layer 30. The formed lid-shaped resin molded body is formed.

Further, in the step of bonding the metal bonding layer 30 bonded to the resin molded body 2 with the low melting point bonding layer 31 and the metal member 1, bonding to the end of the frame-shaped side wall 2 </ b> B so that the hollow portion 4 is formed. The formed metal bonding layer 30 and the metal member 1 are bonded by the low melting point bonding layer 31.
In the present embodiment, the resin of the resin molded body 2 as the low melting point bonding layer 31 in the step of bonding the metal bonding layer 30 bonded to the resin molded body 2 with the low melting point bonding layer 31 and the metal member 1. The resin material of the resin bonding layer 31X made of a resin material having a lower melting point than the material includes the second surface roughened portion 30B provided on the other side of the metal bonding layer 30, and the surface roughened portion 1A of the metal member 1. The metal bonding layer 30 bonded to the resin molded body 2 and the metal member 1 are bonded by the resin bonding layer 31X.

In particular, in the present embodiment, the step of bonding the metal bonding layer 30 bonded to the resin molded body 2 with the resin bonding layer 31X and the metal member 1 forms the resin bonding layer 31X bonded to the metal bonding layer 30. And a step of bonding the metal member 1 and the metal bonding layer 30 bonded to the resin molded body 2 by the resin bonding layer 31X.
Here, in the step of forming the resin bonding layer 31X bonded to the metal bonding layer 30, the resin is applied to the second surface roughening portion 30B provided on the other side of the metal bonding layer 30 bonded to the resin molded body 2. A resin bonding layer 31X bonded to the metal bonding layer 30 is formed so that a resin material for forming the bonding layer 31X is embedded.

  Further, in the step of bonding the metal bonding layer 30 bonded to the resin molded body 2 and the metal member 1 with the resin bonding layer 31X, the resin bonding layer 31X is in contact with the surface roughened portion 1A of the metal member 1. The resin molded body 2 on which the resin molded body 2 provided with the bonding layer 31X and the metal bonding layer 30 is placed on the metal member 1, and the resin material of the resin bonding layer 31X is embedded in the surface roughened portion 1A of the metal member 1. The metal bonding layer 30 and the metal member bonded to the resin molded body 2 by the resin bonding layer 31X by applying pressure while heating at a temperature lower than the melting point of the resin material 2 and higher than the melting point of the resin material of the resin bonding layer 31X. 1 is joined.

More specific description will be given below.
First, as shown in FIG. 2 (A), the first surface roughening is performed by roughening both surfaces of the metal plate to be the metal bonding layer 30 provided in the bonding layer 3 for bonding the metal member 1 and the resin molded body 2. A metal plate 30 having a portion 30A and a second surface roughening portion 30B is prepared.
Here, the metal plate 30 has a shape equivalent to the shape of the end portion joined to the metal member 1 of the resin molded body 2. In this embodiment, since the edge part of the frame-shaped side wall part 2B of the resin molding 2 is joined to the metal member 1, the metal plate 30 has a rectangular frame shape. The thickness of the metal plate 30 is, for example, about 10 μm to about 1000 μm.

Then, for example, both surfaces of the metal plate 30 are roughened by dipping using an etching solution. Here, by adjusting the dip time, the surface roughness (arithmetic average roughness) Ra of the metal plate 30 is set to about 0.5 μm to about 10 μm.
Next, as shown in FIG. 2B, the metal plate 30 roughened on both sides as described above is placed in the mold 10 for molding the resin molded body 2. And as shown in FIG.2 (C), the resin material (for example, PPS) for forming the resin molding 2 is inject | emitted in the metal mold | die 10, and it has arrange | positioned in the metal mold | die 10 by what is called insert molding. The resin molded body 2 is formed on one surface roughened portion (first surface roughened portion 30A) of the metal plate 30. At this time, a resin material for forming the resin molded body 2 flows into minute irregularities formed in one surface roughened portion (first surface roughened portion 30 </ b> A) of the metal plate 30, so-called anchor effect. Thus, the metal plate 30 serving as the metal bonding layer and the resin molded body 2 are bonded with good strength.

Next, as shown in FIG. 2 (D), the resin molded body 2 (molded product) to which the metal plate 30 serving as the metal bonding layer is bonded is taken out from the mold 10 and is shown in FIG. 2 (E). Thus, it arrange | positions in the metal mold | die 11 for forming the resin joining layer 31X (low melting | fusing point joining layer 31) with which the joining layer 3 which joins the metal member 1 and the resin molding 2 is provided.
Next, as shown in FIG. 2 (F), a resin plate (for example, PP) for forming the resin bonding layer 31X is injected into the mold 11, and a metal plate that becomes a metal bonding layer by so-called insert molding. The resin bonding layer 31X is formed on the other surface roughened portion 30 (second surface roughened portion 30B). At this time, a resin material for forming the resin bonding layer 31X flows into minute irregularities formed in the other surface roughened portion (second surface roughened portion 30B) of the metal plate 30, so that a so-called anchor effect is obtained. Thus, the metal plate 30 serving as the metal bonding layer and the resin bonding layer 31X are bonded with good strength.

Next, as shown in FIG. 2G, the resin molded body 2 (molded product; resin component) provided with the resin bonding layer 31 </ b> X and the metal bonding layer (metal plate) 30 is taken out from the mold 11.
Next, as shown in FIG. 3, the resin molded body 2 provided with the metal bonding layer 30 and the resin bonding layer 31 </ b> X as the bonding portion 3 and the metal member 1 thus obtained are bonded by thermocompression bonding.
That is, first, the surface of the metal member 1 is roughened, and the metal member 1 having the surface roughened portion 1A in a region where the resin molded body 2 is bonded (here, a region where the resin bonding layer 31X is bonded) is prepared.

  Here, the surface of the metal member 1 is roughened by dipping using an etching solution, for example, in a state where only the region to be the surface roughening portion 1A is opened and the other regions are masked. Further, by adjusting the dip time, the surface roughness (arithmetic surface roughness) Ra of the surface roughened portion 1A of the metal member 1 is set to be about 0.5 μm to about 10 μm.

Next, the resin molded body 2 provided with the metal bonding layer 30 and the resin bonding layer 31X, and the metal member 1 are arranged in the press machine 12 so that the bonding surfaces of each other come into contact with each other. That is, the resin molded body 2 is placed on the metal member 1 so that the resin bonding layer 31X provided on the resin molded body 2 and the surface roughened portion 1A provided on the metal member 1 are in contact with each other. To place.
Here, the press machine 12 has a heating space, and the inside of the heating space can be heated in the atmosphere. The resin molded body 2 provided with the metal bonding layer 30 and the resin bonding layer 31X and the metal member 1 are uniformly heated by being heated in the atmosphere in the heating space. Thereby, temperature distribution can be prevented from occurring in the resin molded body 2 during heating. For this reason, it is possible to prevent the occurrence of strain and residual stress due to the difference in thermal expansion, and it is possible to suppress the occurrence of peeling of the joint surface, cracking of the resin molded body 2, and the like.

  Here, the heating temperature is lower than the melting point of the resin material of the resin molded body 2 and equal to or higher than the melting point of the resin material of the resin bonding layer 31X. For example, when the resin material of the resin molded body 2 is PPS and the resin material of the resin bonding layer 31X is PP, heating is performed at a temperature of about 170 ° C. to about 180 ° C. Thus, since the heating temperature is lower than the melting point of the resin material of the resin molded body 2, the resin molded body 2 is not softened and deformed, and a good metal-resin composite 5 is manufactured. It becomes possible.

While being heated at such a temperature, the resin molded body 2 placed on the metal member 1 is pressed (pressurized) from above and below. Here, the pressing force of the press is, for example, about 0.2 MPa with respect to the joint.
In this way, the metal bonding layer 30 bonded to the resin molded body 2 and the metal member 1 are bonded by the resin bonding layer 31 </ b> X by applying pressure while heating with the press machine 12, and the metal bonding as the bonding portion 3. The resin molded body 2 and the metal member 1 are bonded by thermocompression bonding via the layer 30 and the resin bonding layer 31X.

At this time, the resin material constituting the resin bonding layer 31X is melted, and a part of the resin material flows into the minute unevenness formed on the surface roughened portion 1A of the metal member 1, thereby causing the metal member 1 to have a so-called anchor effect. And the resin bonding layer 31X are bonded with good strength.
In this way, the metal-resin composite 5 can be manufactured by thermocompression bonding the metal member 1 and the resin molded body 2. The metal-resin composite 5 manufactured in this way is in a good bonded state with high bonding strength and water tightness because the bonding interface between the metal and the resin is directly bonded by the anchor effect. ing.

Therefore, according to the metal-resin composite and the manufacturing method thereof according to the present embodiment, the resin molded body 2 can be prevented from being strained or residual stress, and the resin molded body 2 can be prevented from being deformed. There is an advantage.
[Second Embodiment]
First, the metal-resin composite according to the second embodiment and the manufacturing method thereof will be described with reference to FIGS.

The metal-resin composite and the manufacturing method thereof according to the present embodiment are different in the configuration of the low melting point bonding layer 31 from that of the first embodiment described above.
That is, in the metal-resin composite 5 according to the present embodiment, the low melting point bonding layer 31 is a low melting point metal bonding layer 31Y made of a low melting point metal material having a melting point lower than that of the resin material of the resin molded body 2.

  In addition, the 2nd surface roughening part 30B of the metal joining layer 30 and the surface roughening part 1A of the metal member 1 do not need to be provided. In this case, at least one surface of the metal plate constituting the metal bonding layer 30 may be roughened. Here, the case where the second surface roughened portion 30B of the metal bonding layer 30 is provided and the surface roughened portion 1A of the metal member 1 is not provided is shown as an example.

  Here, the low melting point metal bonding layer 31Y is made of a solder material such as a tin-silver-copper (Sn-Ag-Cu) alloy. Here, the melting point of the Sn—Ag—Cu solder is about 220 ° C. Thus, the solder material of the low melting point metal bonding layer 31Y uses a material having a lower melting point than the resin material of the resin molded body 2. In this case, the metal bonding layer 30 and the metal member 1 are bonded (solder bonded) by the solder material as the low melting point metal bonding layer 31Y. The thickness of the low melting point metal bonding layer 31Y is, for example, about 10 μm to about 1000 μm.

  Thus, in this embodiment, the low-melting point bonding layer 31 is the low-melting point metal bonding layer 31Y, and at least one surface of the metal bonding layer 30 is roughened to have a roughened surface (roughened surface). Part; metal roughened surface) 30A. Thereby, at the interface (bonding surface) between the resin molded body 2 and the metal bonding layer 30, the resin material is embedded in the surface roughened portion 30 </ b> A, thereby being bonded with a good strength by a so-called anchor effect. Yes. Further, the metal bonding layer 30 and the metal member 1 are bonded with good strength by metal bonding (solder bonding) via the low melting point metal bonding layer 31Y. That is, the metal bonding layer 30 and the low melting point metal bonding layer 31Y, and the low melting point metal bonding layer 31Y and the metal member 1 are bonded with good strength by metal bonding (solder bonding). Thereby, when it uses for a water-cooling cooling plate, for example, favorable joint strength and watertightness are realizable.

  In the method for producing a metal-resin composite according to the present embodiment, in the step of bonding the metal bonding layer 30 bonded to the resin molded body 2 with the low melting point bonding layer 31 and the metal member 1, the low melting point bonding layer. The metal bonding layer 30 bonded to the resin molded body 2 and the metal member 1 are bonded by a low melting point metal bonding layer 31Y made of a low melting point metal material having a lower melting point than the resin material of the resin molded body 2 as 31. .

Specifically, as in the case of the first embodiment described above, as shown in FIGS. 8A to 8D, the resin molded body 2 to which the metal bonding layer (metal plate) 30 is bonded is used. Form.
Next, the resin molded body 2 provided with the metal bonding layer 30 as the bonding portion 3 and the metal member 1 thus obtained are solder-bonded with a solder material that becomes the low melting point metal bonding layer 31Y.

That is, first, as shown in FIG. 9 (A), the region where the resin molded body 2 on the metal member 1 is bonded (here, the region where the metal bonding layer 30 provided on the resin molded body 2 is bonded) is low. A solder material to be the melting point metal bonding layer 31Y is disposed.
Here, for example, by applying a solder paste onto the metal member 1 by screen printing, a solder material to be the low melting point metal bonding layer 31 </ b> Y is disposed on the metal member 1. In addition, the solder material used as the low melting-point metal joining layer 31Y may be arrange | positioned on the metal member 1 by arrange | positioning the solder sheet processed into the predetermined shape on the metal member 1. FIG. Here, the thickness of the solder material used as the low melting point metal bonding layer 31Y is, for example, about 10 μm to about 1000 μm.

  Next, as shown in FIG. 9B, the metal bonding layer 30 obtained as described above is provided on the solder material to be the low melting point metal bonding layer 31Y disposed on the metal member 1. The resin molded body 2 thus obtained is placed, and this is placed in a heating furnace 13 and heated as shown in FIG. 9C. That is, the resin molded body 2 is placed on the metal member 1 and heated so that the metal bonding layer 30 provided on the resin molded body 2 and the low melting point metal bonding layer 31Y disposed on the metal member 1 come into contact with each other. Place in the furnace 13 and heat.

  Here, the heating temperature is a temperature lower than the melting point of the resin material of the resin molded body 2 and equal to or higher than the melting point of the solder material to be the low melting point metal bonding layer 31Y. For example, when the resin material of the resin molded body 2 is PPS (melting point: about 280 ° C.) and the solder material used as the low melting point metal bonding layer 31Y is Sn—Ag—Cu solder (melting point: about 220 ° C.), about 230 ° C. to about 240 ° C. Heat at a temperature of ° C. The heating time is, for example, about 1 minute to about 10 minutes.

By heating in this way, as shown in FIG. 9D, the metal bonding layer 30 bonded to the resin molded body 2 and the metal member 1 are soldered by a solder material that becomes the low melting point metal bonding layer 31Y. The resin molded body 2 and the metal member 1 are bonded through the metal bonding layer 30 and the low-melting-point metal bonding layer 31Y which are the bonded portions 3.
Thus, the metal-resin composite 5 can be manufactured by joining the metal member 1 and the resin molding 2. In the metal-resin composite 5 manufactured as described above, the bonding interface between the metal bonding layer 30 and the resin molded body 2 is bonded by the anchor effect, and the metal bonding layer 30 and the metal member 1 are low melting point metals. Since the metal is bonded by the bonding layer 31Y, the bonding strength is strong and the water-tightness is excellent.

Further, as described above, since the heating temperature is lower than the melting point of the resin material of the resin molded body 2 and there is no pressurizing step like the thermocompression bonding of the first embodiment, the resin molded body. 2 is not softened and deformed, and a good metal-resin composite 5 can be manufactured.
Other details are the same as those in the first embodiment.
Therefore, according to the metal-resin composite and the manufacturing method thereof according to the present embodiment, the resin molded body 2 can be prevented from being strained or residual stress, and the resin molded body 2 can be prevented from being deformed. There is an advantage.
[Appendix]
Hereinafter, additional notes will be disclosed regarding each of the above-described embodiments.

(Appendix 1)
A metal member;
A resin molded body;
A joining portion for joining the metal member and the resin molded body;
The joint is
A metal bonding layer having a first surface roughened portion on the resin molded body side, wherein the resin material of the resin molded body is embedded in the first surface roughened portion and bonded to the resin molded body;
A metal-resin composite comprising a low melting point bonding layer made of a material having a melting point lower than that of the resin material of the resin molded body and bonding the metal bonding layer and the metal member.

(Appendix 2)
The low melting point bonding layer is a resin bonding layer made of a resin material having a lower melting point than the resin material of the resin molded body,
The metal bonding layer has a second surface roughened portion on the resin bonding layer side, and the resin material of the resin bonding layer is embedded in the second surface roughened portion and bonded to the resin bonding layer. And
The metal member has a surface roughened portion, and the resin material of the resin bonding layer is embedded in the surface roughened portion and bonded to the resin bonding layer. Metal-resin composite.

(Appendix 3)
The metal-resin composite according to appendix 1, wherein the low melting point bonding layer is a low melting point metal bonding layer made of a low melting point metal material having a melting point lower than that of the resin material of the resin molded body.
(Appendix 4)
The resin molded body is a lid-shaped resin molded body having a base portion and a frame-shaped side wall portion, and an end portion of the frame-shaped side wall portion is interposed through the joint portion so that a hollow portion is formed. The metal-resin composite according to any one of supplementary notes 1 to 3, wherein the metal-resin composite is bonded to the metal.

(Appendix 5)
A method for producing a metal-resin composite by joining a metal member and a resin molded body through a joint,
Resin molding in which the metal bonding layer is bonded so that a resin material for forming the resin molded body is embedded in a first surface roughened portion provided on one side of the metal bonding layer to be the bonding portion Forming a body;
Joining the metal joining layer and the metal member joined to the resin molded body with a low melting point joining layer made of a material having a melting point lower than that of the resin material of the resin molded body to be the joint portion. A method for producing a metal-resin composite.

(Appendix 6)
Resin having a lower melting point than the resin material of the resin molded body as the low melting point bonding layer in the step of bonding the metal member and the metal member bonded to the resin molded body with the low melting point bonding layer The resin material of the resin bonding layer made of a material is embedded in the second surface roughening portion provided on the other side of the metal bonding layer and the surface roughening portion of the metal member, and the resin bonding The method for producing a metal-resin composite according to appendix 5, wherein the metal bonding layer and the metal member bonded to the resin molded body by a layer are bonded.

(Appendix 7)
The step of joining the metal joining layer and the metal member joined to the resin molded body by the resin joining layer,
Bonded to the metal bonding layer in such a manner that a resin material for forming the resin bonding layer is embedded in a second surface roughened portion provided on the other side of the metal bonding layer bonded to the resin molded body. Forming the resin-bonded layer,
The resin molded body provided with the resin bonding layer and the metal bonding layer is placed on the metal member so that the resin bonding layer is in contact with the surface roughened portion of the metal member, and the resin material of the resin bonding layer So as to be embedded in the roughened surface of the metal member, while applying pressure while heating at a temperature lower than the melting point of the resin material of the resin molded body and higher than the melting point of the resin material of the resin bonding layer, The method for producing a metal-resin composite according to appendix 6, further comprising a step of joining the metal joining layer joined to the resin molded body with a joining layer and the metal member.

(Appendix 8)
In the step of joining the metal joining layer joined to the resin molded body with the low melting point joining layer and the metal member, the melting point is lower than the resin material of the resin molded body as the low melting point joining layer. The metal-resin composite according to appendix 5, wherein the metal member and the metal member joined to the resin molded body are joined with a low-melting-point metal joining layer made of a melting point metal material. Method.

(Appendix 9)
In the step of forming the resin molded body to which the metal bonding layer is bonded, the resin molded body has a base portion and a frame-like side wall portion, and is provided on one side of the metal bonding layer that becomes the bonding portion. A lid-shaped resin molded body in which the metal bonding layer is bonded to the end of the frame-shaped side wall portion is formed so that the resin material for forming the resin molded body is embedded in the first roughened surface portion And
In the step of joining the metal joining layer and the metal member joined to the resin molded body with the low melting point joining layer, the joined to the end of the frame-shaped side wall so as to form a hollow part The method for producing a metal-resin composite according to any one of appendices 5 to 8, wherein the metal bonding layer and the metal member are bonded by the low melting point bonding layer.

DESCRIPTION OF SYMBOLS 1 Metal member 1A Surface roughening part 2 Resin molding 2A Base part 2B Frame-like side wall part 3 Joining part 4 Hollow part 5 Metal-resin composite 10, 11 Mold 12 Press machine 13 Heating furnace 30 Metal joining layer (metal plate) )
30A First surface roughened portion 30B Second surface roughened portion 31 Low melting point bonding layer 31X Resin bonding layer 31Y Low melting point metal bonding layer

Claims (6)

A metal member;
A resin molded body;
A joining portion for joining the metal member and the resin molded body;
The joint is
A metal bonding layer having a first surface roughened portion on the resin molded body side, wherein the resin material of the resin molded body is embedded in the first surface roughened portion and bonded to the resin molded body;
A metal-resin composite comprising a low melting point bonding layer made of a material having a melting point lower than that of the resin material of the resin molded body and bonding the metal bonding layer and the metal member. The low melting point bonding layer is a resin bonding layer made of a resin material having a lower melting point than the resin material of the resin molded body,
The metal bonding layer has a second surface roughened portion on the resin bonding layer side, and the resin material of the resin bonding layer is embedded in the second surface roughened portion and bonded to the resin bonding layer. And
The said metal member has a surface roughening part, The resin material of the said resin bonding layer is embedded in the said surface roughening part, and it joins with the said resin bonding layer, It is characterized by the above-mentioned. Metal-resin composite.   2. The metal-resin composite according to claim 1, wherein the low melting point bonding layer is a low melting point metal bonding layer made of a low melting point metal material having a melting point lower than that of the resin material of the resin molded body. A method for producing a metal-resin composite by joining a metal member and a resin molded body through a joint,
Resin molding in which the metal bonding layer is bonded so that a resin material for forming the resin molded body is embedded in a first surface roughened portion provided on one side of the metal bonding layer to be the bonding portion Forming a body;
Joining the metal joining layer and the metal member joined to the resin molded body with a low melting point joining layer made of a material having a melting point lower than that of the resin material of the resin molded body to be the joint portion. A method for producing a metal-resin composite.   Resin having a lower melting point than the resin material of the resin molded body as the low melting point bonding layer in the step of bonding the metal member and the metal member bonded to the resin molded body with the low melting point bonding layer The resin material of the resin bonding layer made of a material is embedded in the second surface roughening portion provided on the other side of the metal bonding layer and the surface roughening portion of the metal member, and the resin bonding The method for producing a metal-resin composite according to claim 4, wherein the metal bonding layer and the metal member bonded to the resin molded body by a layer are bonded.   In the step of joining the metal joining layer joined to the resin molded body with the low melting point joining layer and the metal member, the melting point is lower than the resin material of the resin molded body as the low melting point joining layer. 5. The metal-resin composite according to claim 4, wherein the metal member and the metal member joined to the resin molded body are joined by a low-melting-point metal joining layer made of a melting point metal material. Production method.