JP2018126989A - Joining method between metal member and synthetic resin molded member and joined body between the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joined body partially joined with a simple joining method between a metal member and a synthetic resin molded member.SOLUTION: In the present invention, a metal member 1 and a thermoplastic synthetic resin molded member 2 injection molded are overlapped on each other. A part of a surface 1A of the metal member 1 is pressed towards the synthetic resin molded member 2 by a heat press tool and the metal member 1 is heated so as to melt deeper than the depth to which a skin layer on an outermost surface of the synthetic resin molded member 2 melts, to form a molten part. Thereafter, by cooling the molten part, a joining weld part 4 is formed. By the formation of the joining weld part 4, the metal member 1 is joined with the synthetic resin molded member 2 to obtain a joined body between the metal member and the synthetic resin molded member.SELECTED DRAWING: Figure 1

Description

The present invention relates to a joining method of a metal member and a synthetic resin molded member and a joined body of the metal member and a synthetic resin molded member.

In a joined body in which a metal member is molded integrally with a thermoplastic synthetic resin and the metal and the synthetic resin are joined, the synthetic resin is distorted due to the difference in the coefficient of linear expansion between the metal and the synthetic resin. Measures against distortion such as containing an elastomer have been taken, but a joining method for obtaining a joined body in which a metal member is partially joined to a synthetic resin molded member has been proposed without using such molding.

Patent Document 1 proposes a joining method in which a metal member is partially joined to a synthetic resin molded member by friction stir welding. That is, a method of joining a metal member and a resin member by a hot-pressure joining method of softening and melting the resin member by locally applying heat and pressure from the metal member side, and then solidifying the resin member, A metal member that overlaps with a resin member, presses against a metal member while rotating a cylindrical rotary tool, generates frictional heat, softens and melts the resin member with this frictional heat, and then solidifies and joins the metal member A method for joining the resin member to the resin member has been proposed.

However, in the joining method of the metal member and the resin member of Patent Document 1, when the heat and pressure are locally applied from the metal member side, the pressing member is pushed into the metal member to join the boundary between the metal member and the resin member. The depth is not reached to the surface, and the lower part of the pressing member of the metal member is protruded and deformed to the resin member side so that the molten resin on the surface of the resin member melted in the region immediately below the pressing member at the joining boundary surface This is a joining method of a metal member and a resin member by a hot-pressure joining method in which the resin member is solidified after flowing to the outer peripheral region of the region. However, it is necessary to generate frictional heat so as to soften and melt the resin member.

Patent Document 2 proposes another joining method in which a metal material having a thickness of 0.1 mm or more is locally joined to a resin material by frictional heat. That is, a coating film made of a thermoplastic resin is formed on one surface of a metal material, and the surface on which the coating film is formed is placed on the resin material side so as to overlap the resin material, and a cylindrical rotary tool is formed from the metal material side. The frictional heat is generated by pressing and rotating, the interface between the coating film and the resin material is heated to make them compatible, and then cooled and integrated together, so that the thickness is 0.1 mm or more. A joining method for joining a metal material and a resin material has been proposed.

However, in the joining method of the metal material and the resin material of Patent Document 2, since the coating film made of the thermoplastic resin is mixed and integrated with the resin material, friction heat is used without damaging the resin material. However, it is necessary to select a metal material having a thickness of 0.1 mm or more and generate frictional heat so as to soften and melt the resin member with frictional heat, as in Patent Document 1.

Japanese Patent Laying-Open No. 2015-131443 JP 2009-279858 A

In order to solve the above-described problems, an object of the present invention is to provide a joined body in which a metal member and a synthetic resin molded member are partially joined by a simple joining method. In this case, the joined body that partially joins the metal member and the synthetic resin molded member includes locally joined, locally joined, and spot joined joints.

The method for joining the metal member and the synthetic resin molded member according to claim 1 of the present invention includes a polymerization step of superimposing the metal member and an injection-molded thermoplastic synthetic resin molded member, and a surface of the metal member. A part is pressed with a heat press tool in the direction of the synthetic resin molded member, and the metal member is heated so that it melts deeper than the depth at which the skin layer on the outermost surface of the synthetic resin molded member melts. A bonded welded portion is formed by a heat press step to be formed and a cooling step for cooling the melted portion, and the metal member is bonded to the synthetic resin molded member by forming the bonded welded portion. The method for joining the metal member and the synthetic resin molded member according to claim 2 is the method according to claim 1, wherein a minute uneven portion is formed by laser irradiation on the back surface of the metal member used in the heat press step. In addition, the metal member and the synthetic resin molded member are joined through the fine uneven portion. The method for joining a metal member and a synthetic resin molded member according to claim 3 is the method according to claim 1 or 2, wherein, in the heat press step, a part of the surface of the metal member is formed by the heat press tool. The metal member is pressed in the direction of the molded member and heated deeper than the depth at which the skin layer on the outermost surface of the synthetic resin molded member melts. The method for joining a metal member and a synthetic resin molded member according to claim 4 is the method according to any one of claims 1 to 3, wherein the heat press includes a heater, and the heater is controlled to synthesize the synthetic resin molded member. The metal member is heated to a temperature at which the metal melts. A joined body of the metal member according to claim 5 and the synthetic resin molded member is obtained by joining the metal member according to any one of claims 1 to 4 and an injection-molded thermoplastic synthetic resin molded member. The metal member and the synthetic resin molded member are joined to each other.

The method of joining the metal member and the synthetic resin molded member according to the present invention includes a polymerization process in which the metal member and an injection-molded thermoplastic synthetic resin molded member are overlapped, and a part of the surface of the metal member is heated with a heat press tool. A heat pressing step of pressing in the direction of the synthetic resin molded member and heating the metal member so as to melt deeper than a depth at which the outermost skin layer of the synthetic resin molded member melts; Since the welded part is formed by the cooling process for cooling the melted part, and the metal member is joined to the synthetic resin molded member by the formation of the welded part, the metal member and the synthetic resin molded member are partially joined by a simple operation. To obtain a joined body.

It is AA sectional drawing of Embodiment 2 in Embodiment 1 of this invention. It is a top view of the joined body which joined the metal member and the synthetic resin molding member in Embodiment 1 of this invention. It is a flowchart which shows the joining operation process of the metal member and synthetic resin molding member of this invention. It is BB sectional drawing of Embodiment 5 in Embodiment 1 of this invention. It is sectional drawing which shows the state which piled up the metal member and the synthetic resin molded member in the superposition | polymerization process of Embodiment 1 of this invention. It is sectional drawing which shows the operation state which joins a metal member and a synthetic resin molding member in Embodiment 1 of this invention. It is sectional drawing which shows the operation state which surface-treats by laser irradiation to the back surface of a metal member in Embodiment 2 of this invention. It is a rear view which shows the metal member surface-treated in Embodiment 2 of this invention. It is sectional drawing which shows the state which piled up the metal member and the synthetic resin molded member in the superposition | polymerization process of Embodiment 2 of this invention. It is sectional drawing of the conjugate | zygote which joined the metal member and the synthetic resin molding member in Embodiment 2 of this invention. It is CC sectional drawing of FIG. 12 in Embodiment 3 of this invention. It is a top view of the joined body which joined the metal member and the synthetic resin molding member in Embodiment 3 of this invention. It is sectional drawing which shows the operation state which joins a metal member and a synthetic resin molding member in Embodiment 3 of this invention. It is DD sectional drawing of Embodiment 16 in Embodiment 4 of this invention. It is EE sectional drawing of FIG. 16 in Embodiment 4 of this invention. It is a top view of the joined body which joined the metal member and the synthetic resin molding member in Embodiment 4 of this invention. It is sectional drawing which shows the operation state which joins a metal member and a synthetic resin molding member in Embodiment 4 of this invention. It is sectional drawing which shows the operation state which joins a metal member and a synthetic resin molding member in Embodiment 5 of this invention. It is sectional drawing of the joined body which joined the metal member and the synthetic resin molding member in Embodiment 5 of this invention.

(Embodiment 1)
With reference to FIGS. 1-6, the joining method of a metal member and a synthetic resin molding member and the joined body of the metal member and a synthetic resin molding member are demonstrated.

1 and 2, a metal member 1 is a flat plate having a front surface 1A (upper surface in FIG. 1) and a back surface 1B (lower surface in FIG. 1). The back surface 1B of the metal member 1 is injection-molded heat. The plastic synthetic resin molded member 2 is partly firmly joined to the surface 2A of the plastic synthetic resin member 2 via a joint weld portion 4. 3 is a heat press site | part to which the metal member 1 is pressed with the heat press tool HP1 mentioned later. The shape of the metal member 1 is exemplified by a rectangular shape, but it is an arbitrary shape such as a circular shape, and a thin plate having a thickness of 0.1 mm or less is exemplified. In addition to such a thin plate, a three-dimensional shape having irregularities, for example, Although not shown, the back surface 1 </ b> B may have a concavo-convex shape and the convex portion may be embedded in the front surface 2 </ b> A of the synthetic resin molded member 2. Moreover, since the metal member 1 should just be a metal material at least the part (back surface 1B of the metal member 1) joined to the synthetic resin molding member 2, it is not only a metal simple substance, but the metal multilayer body which intervened the synthetic resin material, for example, synthetic | combination A multilayer film in which an aluminum film is laminated on both surfaces of a resin film may be used. Examples of the metal material of the metal member 1 include metal materials such as one or more metals selected from stainless steel, iron, aluminum, copper, nickel, zinc, and tin, or alloys containing one or more metals. Water-repellent or oil-repellent coating treatment with a fluorinated resin or fluorine-based resin, or rust-preventive coating treatment with benzotriazole, copper (including copper alloy), or galvanization treatment on the surface of copper (including copper alloy) The surface of iron (including alloy) or aluminum (including alloy) may be subjected to a rust preventive film treatment with chromate, or an alumite treatment. Examples of the material of the synthetic resin molded member 2 include a molded product that is injection-molded with a thermoplastic synthetic resin material (including an inorganic filler) such as polyphenylene sulfide (PPS) resin, polypropyne (PP) resin, and ABS resin.

(Join method of metal member and synthetic resin molding member)
In FIG. 3, the joining operation of the metal member and the synthetic resin molded member is performed in the order of the polymerization step S1, the heat press step S2, and the cooling step S3 using the heat press tool HP1 and the die D. 4 and 5, the injection-molded thermoplastic synthetic resin molded member 2 is placed on the die D and the metal member 1 and the synthetic resin molded member 2 are overlapped with each other. Next, in the heat press step S2, the heat press part 3 on the surface 1A of the metal member 1 is moved in the direction of the synthetic resin molded member 2 with the heat press tool HP1 in a state where the metal member 1 and the synthetic resin molded member 2 are overlapped. Press and heat. In this case, the heat press tool HP1 exemplifies a cylindrical metal material having thermal conductivity, but it may be in the shape of a prism, cylinder, or square tube. The heat press tool HP1 is provided with a heater, and this heater controls energization by the power source G, and a skin layer (not shown) on the outermost surface of the injection-molded thermoplastic synthetic resin molded member 2 Heat at a temperature that melts deeper than the depth at which it melts. Next, in the cooling step S3, the heat press part HP1 presses the heat press part 3 on the surface 1A of the metal member 1 for a predetermined time and, after heating, the metal member 1 and the synthetic resin molded member 2 are cooled, thereby synthesizing. The melted portion of the surface 2A of the resin molded member 2 is solidified to form a bonded welded portion 4, and a bonded body of the metal member 1 and the synthetic resin molded member 2 is obtained by forming the bonded welded portion 4. In this way, the joining method of the metal member 1 and the synthetic resin molded member 2 is performed by superposing the metal member 1 and the synthetic resin molded member 2 shown in FIGS. 4 and 5 and the metal shown in FIG. A part of the surface 1A of the member 1 is pressed in the direction of the synthetic resin molded member 2 by the heat press tool HP1 and the metal member 1 is deeper than the depth at which the skin layer on the outermost surface of the synthetic resin molded member 2 is melted. Since it consists of the heat press process S2 which heats, and the cooling process S3 which cools the synthetic resin molding member 2 which fuse | melted, the joined body of the metal member 1 and the synthetic resin molding member 2 is obtained by a simple operation process.

In the said Embodiment 1, although the case where the heat press site | part 3 of the surface 1A of the metal member 1 was partially joined in one place with the heat press tool HP1, the joining welding part 4 of multiple places was obtained. The heat press part 3 may be a plurality of places.

(Embodiment 2)
With reference to FIGS. 7 to 10, as in the first embodiment, the heat press part HP1 presses the heat press portion 3 on the surface 1 </ b> A of the metal member 1 in the direction of the injection-molded thermoplastic synthetic resin member 2. And the joining method of the metal member 1 and the synthetic resin molding member 2 to be joined by heating at a temperature at which the skin layer on the outermost surface of the synthetic resin molding member 2 is melted deeper than the melting depth, and the metal member 1 and the composition A joined body with the resin molded member 2 will be described.

The difference from the first embodiment is that, as shown in FIG. 7 and FIG. 8, the back surface 1 </ b> B of the metal member 1 is irradiated with a laser L to perform a surface treatment to form fine uneven portions 5, and this fine unevenness The metal member 1 is joined to the synthetic resin molded member 2 via the part 5, and the other points are the same as in the first embodiment. In this case, as shown in FIG. 9, the region of the fine uneven portion 5 may be the entire back surface 1B of the metal member 1, but the back surface 1B of the metal member 1 is irradiated with laser over a region wider than the region of the heat press part 3. A fine uneven portion 5 is formed. In addition, the metal member 1 is irradiated with the laser L on the back surface 1B in advance to form the fine uneven portion 5, but the metal member 1 has the fine uneven portion 5 formed on the back surface 1B of the metal member 1 by the laser illumination L. Since the metal member 1 and the synthetic resin molded member 2 may be joined together, although not shown, the synthetic resin molded member 2 is placed on the die D and the metal member 1 and the synthetic resin molded member 2 are overlapped. The fine irregularities 5 may be formed by irradiating the laser L during the polymerization process, or the fine irregularities 5 may be formed by irradiating the laser L during the heat pressing process. Then, the surface 1A of the metal member 1 may be pressed in the direction of the synthetic resin molded member 2 and heated by the heat press tool HP1. In this way, the metal member 1 is formed on the synthetic resin molded member 2 so that the fine uneven portion 5 formed on the back surface 1B of the metal member 1 faces the surface 2A of the thermoplastic synthetic resin molded member 2 which has been injection molded. As shown in FIG. 10, the skin of the outermost surface of the synthetic resin molded member 2 is pressed by pressing the heat press portion 3 of the surface 1A of the metal member 1 in the direction of the synthetic resin molded member 2 with the heat press tool HP1. Heating is performed at a temperature at which the layer is melted deeper than the melting depth to form a melted portion that has entered the fine uneven portion 5, and is cooled and solidified to form the joint weld portion 4 of the synthetic resin molded member 2 of the metal member 1. Since it is formed with the fine irregularities 5 on the back surface 1B, a joined body of the metal member 1 and the synthetic resin molded member 2 having higher joint strength than that of the first embodiment is obtained.

In the second embodiment, as in the first embodiment, the heat press part 3 that presses and heats the surface 1A of the metal member 1 in the direction of the injection-molded thermoplastic synthetic resin member 2 with the heat press tool HP1 is 1. Although the places are illustrated, a plurality of places may be used. In this case, it is good also as a joined body which has different joint strength by pressing and heating the site | part which does not have the fine uneven | corrugated | grooved part 5 with the heat press tool HP1. Alternatively, a plurality of fine concavo-convex portions 5 may be formed by irradiating a plurality of lasers L on the back surface 1 </ b> B of the metal member 1 at intervals. Furthermore, the region of the fine uneven portion 5 may be a region narrower than the region of the heat press part 3.

(Embodiment 3)
Referring to FIGS. 11 to 13, the metal member is pushed in the direction of the synthetic resin molded member by a heat press tool different from that of Embodiment 1, and the skin layer on the outermost surface of the synthetic resin molded member is melted. A joining method between a metal member and a synthetic resin molded member, which is characteristic of the heat press process for heating deeper than the depth to be processed, and a joined body between the metal member and the synthetic resin molded member will be described.

The thermoplastic synthetic resin molded member 2 injection-molded in the polymerization step S1 as in the first embodiment is placed on the die D, and the metal member 1 and the injection-molded thermoplastic synthetic resin molded member 2 are stacked. Match. Next, in the heat press step S2, the heat press portion 31 on the surface 1A of the metal member 1 is pushed in the direction of the synthetic resin molded member 2 by the heat press tool HP2 and the protruding portion 6 of the metal member 1 is injection molded. The melted portion is formed by heating deeper than the depth at which the skin layer on the outermost surface of the synthetic resin molded member 2 melts. In this case, the heat press tool HP2 is a cylindrical or prismatic metal material, and the tip is formed in a spherical shape. This heat press tool HP2 is provided with a heater as in the first embodiment, and this heater controls energization by the power supply unit G and has a depth greater than the depth at which the skin layer on the outermost surface of the synthetic resin molded member 2 melts. Then, it is heated at a temperature at which it is deeply melted, and then cooled in a cooling step S3. By cooling the metal member 1 and the synthetic resin molded member 2 in this manner, the melted portion of the surface 2A of the synthetic resin molded member 2 is solidified to form a bonded welded portion 41. By forming, it becomes a joined body of the metal member 1 and the synthetic resin molded member 2, and the joining of the metal member 1 and the synthetic resin molded member 2 having higher joint strength due to the presence of the protruding portion 6 of the metal member 1 than in the first embodiment. The body is obtained.

In the said Embodiment 3, although the heat press site | part 31 which presses and heats the surface 1A of the metal member 1 in the direction of the synthetic resin molding member 2 with the heat press tool HP2 illustrated one place, multiple places may be sufficient. In this case, different bonding strengths may be distributed by using both the heat press part 31 by the heat press tool HP2 and the heat press part 3 by the heat press tool HP1 shown in the first embodiment.

In order to heat the metal member 1 deeper than the depth at which the outermost skin layer of the synthetic resin molded member 2 is melted by pressing the metal member 1 in the direction of the synthetic resin molded member 2 with the heat press tool HP2. As a material of the metal member 1, a thin flat plate that can be easily bent, for example, a metal material such as aluminum (including an alloy) having a thickness of 0.1 mm or less, stainless steel, or the like is desirable. The bonding strength between the metal member 1 and the synthetic resin molded member 2 may be increased by forming a certain three-dimensional shape (not shown) and embedding the convex portion in the surface 2A of the synthetic resin molded member 2. Note that, as in the second embodiment, a fine uneven portion 5 may be formed on the back surface 1B of the metal member 1 to further increase the bonding strength between the metal member 1 and the synthetic resin molded member 2.

(Embodiment 4)
With reference to FIGS. 14-17, an elongate metal member is pressed to the direction of a synthetic resin molding member with the heat press tool different from Embodiment 1, and the said metal member is outermost surface of the said synthetic resin molding member A joining method of a metal member and a synthetic resin molded member, which is characterized in the heat press step for heating deeper than the depth at which the skin layer melts, and a joined body of the metal member and the synthetic resin molded member will be described.

14 to 16, a metal member 1 is a pair of long metal plates having a front surface 1A (upper surface in the drawing) and a back surface 1B (lower surface in the drawing), and the material thereof is stainless steel, iron, aluminum. Examples thereof include metal materials such as one or more metals selected from copper, nickel, zinc and tin, or alloys containing one or more metals. The back surface 1B around the end of one end of the metal member 1 is made of a thermoplastic synthetic resin material (including an inorganic filler) such as polyphenylene sulfide (PPS) resin, polypropyne (PP) resin, ABS resin and the like as in the first embodiment. The melted portion of the surface 2A of the injection molded synthetic resin molded member 2 is cooled and solidified to form a bonding portion 4, and bonded by the formation of the bonded portion 4, which is heat-pressed. The tool HP3 is used, and the heat press portion 3 is illustrated at one place, but may be joined at a plurality of places. Since the metal member 1 has a long shape, only the metal member 1 protrudes from the end portion at one end thereof in the other end direction and can be connected or connected to another member. Examples of connecting or connecting only the metal member 1 in the direction of the other end and connecting to other members include a bus bar used for connection to a power feeding unit such as an injector circuit of an automobile engine or a motor control circuit. This bus bar is formed in a synthetic resin molding so as to be a power connector, and is generally formed by insert molding. However, as a power connector having a long bus bar, for example, a plurality of power connectors In the insert molding method in the case of arranging them in series, in Japanese Patent Laid-Open No. 2002-154131, a primary molding cavity in which a bus bar is set and filled with resin and a secondary molding cavity having a connector molding part are separately or An invention has been proposed in which primary molding and secondary molding are simultaneously performed with a single mold to obtain an insert molded product that is longer than the longest moldable dimension of an insert molding machine. However, simplification of workability is required, and furthermore, there is a restriction on the size of the long insert molded product on the production surface of the insert molding die apparatus. For this insert molding, only the metal member 1 according to the fourth embodiment is protruded in the other end direction, and the metal member 1 and the synthetic resin molded member 2 are joined with the metal member 1 by a simple operation by the joining method. A joined body with the resin molded member 2 is obtained.

Next, a method for joining the metal member and the synthetic resin molded member will be described below with reference to FIGS. 3 and 17.

Similar to the first embodiment shown in FIG. 3, the joining operation of the metal member and the synthetic resin molded member is performed in the order of the polymerization step S1, the heat press step S2, and the cooling step S3. Although not shown in the polymerization step S1, the end of the metal member 1 and the injection-molded thermoplastic synthetic resin molded member 2 are overlapped. Next, in the heat press step S2, the end of the pair of metal members 1 and the injection-molded thermoplastic synthetic resin molded member 2 are overlapped with each other by the heat press tool HP3 shown in FIG. Is heated deeper than the depth at which the outermost skin layer of the thermoplastic synthetic resin molded member 2 injection-molded in the direction of the synthetic resin molded member 2 placed on the die D is melted to form a melted portion. To do. In this case, the heat press tool HP3 is a metal material having a pair of columnar legs that press the surfaces 1A of the pair of metal members 1, and the tips thereof are formed flat. This heat press tool HP3 is provided with a heater as in the first embodiment, and this heater controls energization by the power source G, and a skin layer (not shown) on the outermost surface of the synthetic resin molded member 2 is provided. After heating at a temperature for melting deeper than the melting depth, cooling is performed in the cooling step S3. By cooling the melted portion of the surface 2A of the synthetic resin molded member 2 in this way, as shown in FIGS. 14 and 15, the melted portion of the surface 2A of the synthetic resin molded member 2 is solidified to form the bonding welded portion 4. By forming the joint welded portion 4, the metal member 1 and the synthetic resin molded member 2 are joined to each other, and the metal member 1 and the synthetic resin molded member 2 useful for joining in a shape that does not fit into the molding die. The joined body is obtained.

(Embodiment 5)
Referring to FIGS. 18 and 19, a long metal member similar to that of the fourth embodiment is pressed in the direction of the synthetic resin molded member with a different heat press tool, so that the metal member is outermost of the synthetic resin molded member. A joining method between a metal member and a synthetic resin molded member, which is characteristic of the heat press step for heating deeper than the depth at which the skin layer on the surface melts, and a joined body between the metal member and the synthetic resin molded member will be described.

In FIG. 18, the heat press tool HP4 is a metal material having a pair of columnar legs that press the surface 1A of a pair of metal members 1 similar to the heat press tool HP3 shown in the fourth embodiment, and the tip is the heat press tool HP3. Unlike spheres are formed. A synthetic resin in which the heat press part 31 of the surface 1A of the metal member 1 is placed on the die D by the heat press tool HP4 and the protrusion 6 of the metal member 1 is placed on the die D in the heat press step S2 (see FIG. 3). The melted portion is formed by pressing in the direction of the molded member 2 and heating deeper than the depth at which the outermost skin layer of the thermoplastic synthetic resin molded member 2 that has been injection molded melts. Next, in the cooling step S3 (see FIG. 3), the melted portion is cooled to form a bonded welded portion 41. For forming the bonded welded portion 41, as shown in FIGS. The protruding portion 6 formed on the back surface 1B of the member 1 is pushed into the synthetic resin molded member 2 to form a strong bonded body, and the metal member 1 and the synthetic resin molded member 2 useful for bonding in a shape that cannot fit into the molding die. The joined body is obtained.

In addition, you may use each heat press tool HP3 and heat press tool HP4 shown in Embodiment 4 and 5 for each of a pair of metal member 1. FIG. At that time, the heat press tool HP3 and the heat press tool HP4 are not connected to each other in a shape having a pair of legs, but are connected in a ring shape to form a cylindrical or rectangular tube shape to form the annular welded portions 4, 41. May be obtained.

In this way, the metal member 1 and the injection-molded thermoplastic synthetic resin molded member 2 are overlapped, and a part of the surface 1A of the metal member 1 is synthetic resin with the heat press tools HP1, HP2, HP3 and HP4. After pressing in the direction of the molded member 2 and heating the metal member 1 so as to melt deeper than the depth at which the outermost skin layer of the synthetic resin molded member 2 melts, the melted portion is formed. By cooling and solidifying, the bonded portions 4 and 41 are formed. By forming the bonded portions 4 and 41, a bonded body of the metal member 1 and the synthetic resin molded member 2 is obtained. In this case, it is exemplified that the heaters HP1, HP2, HP3 and HP4 are provided with heaters so that the synthetic resin molded member 2 is heated via the metal member 1, but the principle of the present invention is patented. Regardless of the frictional heat as in References 1 and 2, a part of the surface 1A of the metal member 1 is pressed in the direction of the injection-molded thermoplastic synthetic resin molded member 2, and the metal member 1 is pressed into the synthetic resin molded member 2. In the heat press step S2, the welded portion 4 and 41 is formed by cooling and solidifying the melted portion formed by heating so that the skin layer on the outermost surface melts deeper than the melting depth. The heat press tools HP1, HP2, HP3, and HP4 that use the metal member 1 are pressed in the direction of the synthetic resin member 2 if the metal member is heated by using another heat source without incorporating a heater. It is sufficient to have a capacity only.

INDUSTRIAL APPLICABILITY The present invention is useful for joining a shape that cannot fit into a molding die, and is useful for joining a part having a member that is easily damaged by heat, such as a semiconductor chip, by a joining operation. It is useful as a separate recycling of the metal member and the synthetic resin molded member by reheating above the glass transition temperature of the synthetic resin. In addition, in the joined body of the metal member and the synthetic resin molded member, there is a difference in the linear expansion coefficient between the metal member and the synthetic resin molded member. Since it is easier to prevent deformation of the joined body due to linear expansion, it is useful for joining the metal member of the automobile body and the synthetic resin molded member.

DESCRIPTION OF SYMBOLS 1 Metal member 2 Synthetic resin molding member 3, 31 Heat press part 4, 41 Joining welding part

Claims (5)

A polymerization process in which a metal member and an injection-molded thermoplastic synthetic resin molded member are overlapped, and a part of the surface of the metal member is pressed in the direction of the synthetic resin molded member with a heat press tool, and the metal member is synthesized. A bonding weld site is formed by a heat press process for forming a melted portion by heating so that the skin layer on the outermost surface of the resin molded member melts deeper than the melted depth, and a cooling process for cooling the melted portion. A method for joining a metal member and a synthetic resin molded member, characterized in that the metal member is joined to the synthetic resin molded member by forming the joint welded portion. On the back surface of the metal member used in the heat press process, a fine uneven portion is formed by laser irradiation, and the metal member and the synthetic resin molded member are joined via the fine uneven portion. The joining method of the metal member and synthetic resin molding member of Claim 1 characterized by these. In the heat press step, a depth at which a part of the surface of the metal member is pushed in the direction of the synthetic resin molded member by the heat pressing tool and the skin layer on the outermost surface of the synthetic resin molded member is melted. 3. The method for joining a metal member and a synthetic resin molded member according to claim 1 or 2, wherein heating is performed deeply as described above. The metal member according to any one of claims 1 to 3, wherein the heat press includes a heater, and the metal member is heated to a temperature at which the synthetic resin molded member is melted by controlling the heater. Bonding method with synthetic resin molding. The metal member and the synthetic resin molded member can be joined by a joining method of the metal member according to any one of claims 1 to 4 and an injection-molded thermoplastic synthetic resin molded member. A joined body of a metal member and a synthetic resin molded member.

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