JP2020075470A - Joined article between metal molding and synthetic resin molding and method for manufacturing the same - Google Patents

Abstract

To provide a joined article that is easy in joint work even for a large molding article without melting a synthetic resin molding at a joint area between a metal molding and the synthetic resin molding, and a method for manufacturing the same.SOLUTION: A joined article made of a metal molding 1 and a synthetic resin molding 2 is provided with a joint region 4 formed through a surface processing to firmly join to a filler material 3 at a joint area 11 on a surface of the metal molding 1. The synthetic resin molding 2 is provided with a through hole 21 formed corresponding to the joint region 4. The metal molding 1 and the synthetic resin molding 2 are joined together via the filler material 3 joined to the joint region 4 in the through hole 21. The joined article is manufactured in which the metal molding 1 and the synthetic resin molding 2 are joined together via the filler material 3 formed of a filler raw material solidified from a molten state through: a lamination step for laminating the metal molding 1 and the synthetic resin molding 2; a surface processing step for forming the joint region 4; a filling and heating step for filling the molten filler raw material into the through hole 21; and a cooling step.SELECTED DRAWING: Figure 1

Description

The present invention relates to a joined body of a metal molded body and a synthetic resin molded body, and a method for manufacturing the same.

The metal molded body and the synthetic resin molded body are joined to each other in such a manner that a predetermined region of the metal molded body becomes a bonded region portion for bonding with the synthetic resin molded body without using caulking connection with rivets or fastening with screws or bolts. Various joined bodies for joining and are known.

For example, in Patent Document 1, a state in which a through hole is formed in a metal plate material (corresponding to a metal molded body), and a metal plate material and a thermoplastic resin plate material (corresponding to a synthetic resin molded body) are laminated and pressed against each other. Then, by heating the metal plate material to melt the thermoplastic resin plate material, flowing into the through hole of the metal plate material, flowing out to the other side and solidifying, the outer surface on the other side of the metal plate material is more than the through hole. Proposal of a joined body of a metal molded body and a synthetic resin molded body in which a thermoplastic resin plate material is joined to a through hole of a metal plate material (corresponding to a metal molded body) so as to form a large retaining portion. Has been done.

However, in the bonded body of the metal molded body and the synthetic resin molded body of Patent Document 1, the through hole formed in the metal plate material serves as a bonding area portion for bonding with the thermoplastic resin plate material, and the thermoplastic resin plate material Since the resin is melted and joined, the synthetic resin molded body is melted, and it is necessary to take measures to reduce the influence on the appearance due to sink marks and warpage of the synthetic resin molded body. Since the body is joined to the outer surface of the metal molded body so as to form a retaining portion larger than the through hole, it is necessary to secure the formation of the retaining portion in order to maintain the joint performance.

Further, in Patent Document 2, a protrusion is provided on the surface of a metal member (corresponding to a metal molded body), a perforation is formed in a joint region of the protrusion, and a resin member (a synthetic resin molded body is formed in the joint region). (Equivalent) is pressed and contacted, and the resin member in contact with the joining area of the metal member protrusion is melted by the irradiation of the laser beam, and the molten resin member is filled into the perforated portion and solidified to form the metal forming. A joined body of a body and a synthetic resin molded body has been proposed.

However, even in the joined body of the metal molded body and the synthetic resin molded body of Patent Document 2, since the resin member which is the synthetic resin molded body is melted and bonded, the surface of the metal molded body is protruded to form a bonded region. It is necessary to form a portion, and it is necessary to take measures to improve the filling rate of the perforated portion of the resin member while suppressing the thermal deformation strain of the resin member.

JP, 2013-193441, A JP, 2017-94653, A

In order to solve the above-mentioned problems, the present invention provides a bonded body and a bonding body in which the bonding work is easy even for a large molded body without melting the synthetic resin molded body at the bonding surface between the metal molded body and the synthetic resin molded body. It is intended to provide a manufacturing method.

The bonded body of the metal molded body and the synthetic resin molded body according to claim 1 of the present invention is a bonded body in which the metal molded body and the synthetic resin molded body are bonded via a filler, On the joint surface where the metal molded body and the synthetic resin molded body on the surface of the body are bonded, a joint region portion that is formed by surface treatment for firmly bonding with the filler is provided, and the synthetic resin molded body is A through hole formed corresponding to the joining area portion, wherein the metal molded body and the synthetic resin molded body are joined together through the filler joined to the joining area portion in the through hole. It is characterized by being The bonded body of the metal molded body and the synthetic resin molded body according to claim 2 is the bonded body of the metal molded body and the synthetic resin molded body according to claim 1, wherein a through hole of the synthetic resin molded body is formed. The inner peripheral wall is characterized by having a bent shape. The bonded body of the metal molded body and the synthetic resin molded body according to claim 3 is the bonded body of the metal molded body and the synthetic resin molded body according to claim 1, wherein the through hole of the synthetic resin molded body is It is characterized in that it has a trapezoidal shape in which its end face has a large diameter in its cross-sectional shape. The joined body of the metal molded body and the synthetic resin molded body according to claim 4 is the joined body of the metal molded body and the synthetic resin molded body according to any one of claims 1 to 3, Is characterized by being made of a thermoplastic resin. The bonded body of the metal molded body and the synthetic resin molded body according to claim 5 is the bonded body of the metal molded body and the synthetic resin molded body according to any one of claims 1 to 3, wherein: Is characterized by being made of a curable resin by heat, light or a chemical reaction. A manufacturing method for obtaining a bonded body of a metal molded body and a synthetic resin molded body according to claim 6 is the bonded body of the metal molded body and the synthetic resin molded body according to any one of claims 1 to 5. In the manufacturing method to be obtained, a laminating step of laminating a metal molded body and a synthetic resin molded body in which a through hole is formed, a surface treatment step of forming a bonding region portion on the metal molded body, a metal molded body and a synthetic resin molded body. A filling / heating step of supplying a filling material to the through hole in a state of being stacked and filling the through hole with the filling material in a molten state; cooling the metal molded body and the synthetic resin molded body to form the through hole And a cooling step of obtaining a filler that is bonded to the bonding region portion. The method for producing a joined body of a metal molded body and a synthetic resin molded body according to claim 7 is the same as the method for producing a joined body of a metal molded body and a synthetic resin molded body according to claim 6. The filling / heating step is characterized in that the inside of the through-hole is decompressed by vacuuming and the molten filling material is filled. A manufacturing method for obtaining a joined body of a metal molded body and a synthetic resin molded body according to claim 8 is the method for obtaining a joined body of a metal molded body and a synthetic resin molded body according to claim 6 or 7. In the surface treatment step, the joining area portion is formed by performing a surface treatment for strongly joining the filler to the joining surface of the metal molded body. The method for producing a joined body of a metal molded body and a synthetic resin molded body according to claim 9 is the same as the method for producing a joined body of a metal molded body and a synthetic resin molded body according to claim 6 or 7. In the bonding surface of the metal molded body by irradiating a laser beam through a through hole of the synthetic resin molded body by applying the surface treatment step in a state where the metal molded body and the synthetic resin molded body are laminated in the laminating step. It is characterized in that the bonding region is formed by performing a surface treatment for firmly bonding with the filler.

The bonded body of the metal molded body and the synthetic resin molded body of the present invention is a bonded body in which the metal molded body and the synthetic resin molded body are bonded via a filler, and the metal on the surface of the metal molded body is On the joint surface where the molded body and the synthetic resin molded body are bonded to each other, there is provided a bonding region portion which is formed by a surface treatment for firmly bonding with the filler, and the synthetic resin molded body corresponds to the bonding region portion. Since the metal molded body and the synthetic resin molded body are bonded to each other through the filling material bonded to the bonding region portion in the through hole, the metal molded body is formed. It can also be applied to the joining of large joints without melting the synthetic resin molded body at the joint surface between the synthetic resin molded body and the synthetic resin molded body, and measures against the effects such as appearance due to sink marks and warpage of the synthetic resin molded body. A joined body of a metal molded body and a synthetic resin molded body can be obtained without requiring the work of applying. Further, a laminating step of laminating the metal molded body and a synthetic resin molded body having a through hole formed therein, a surface treatment step of forming a bonding region portion on the metal molded body, and a laminating of the metal molded body and the synthetic resin molded body. In the state where the filling raw material is supplied to the through hole to fill the through hole with the filling raw material in a molten state, the filling / heating step, the metal molded body and the synthetic resin molded body are cooled, and the inside of the through hole is formed. Since the bonded body of the metal molded body and the synthetic resin molded body is manufactured by the manufacturing method including the bonding region and the cooling step of obtaining the bonded filler, the bonded surface of the metal molded body and the synthetic resin molded body is synthesized. A bonded body of a metal molded body and a synthetic resin molded body can be obtained by a simple operation even for the bonding work of a large bonded body without melting the resin molded body.

FIG. 3 is a sectional view taken along line AA of FIG. 2 in the first embodiment of the joined body of the present invention. 1 is a plan view of a joined body according to Embodiment 1 of the joined body of the present invention. FIG. 5 is a cross-sectional view taken along the line BB of FIG. 4 in the second embodiment of the joined body of the present invention. It is a top view of a joined body in Embodiment 2 of a joined body of the present invention. It is sectional drawing of the operation state which supplies a filling raw material to a synthetic resin molding in order to obtain the joined body which joins the metal molding of this invention, and a synthetic resin molding. The joining process figure in Embodiment 1 of the joining method which manufactures the joined body of this invention is shown. It is sectional drawing which shows the working state in the lamination process same as the above. It is sectional drawing which shows the working state in the surface treatment process same as the above. It is sectional drawing which shows the working state of the vacuuming in the filling heating process same as the above. It is sectional drawing which shows the working state of the filling raw material supply in the filling heating process same as the above. It is sectional drawing which shows the working state of the filler formation in the cooling process same as the above. It is sectional drawing which shows the working state which takes out a joined body after cooling in the cooling process same as the above. The joining process figure is shown in Embodiment 2 of the joining method which manufactures the joined body of this invention. It is sectional drawing which shows the working state in the lamination process same as the above. It is sectional drawing which shows the working state in the filling heating process same as the above. It is sectional drawing which shows the working state in the filling heating process in Embodiment 3 of the joining method which manufactures the joined body of this invention. It is sectional drawing which shows the working state of the filler formation in the cooling process same as the above. The joining process figure is shown in Embodiment 4 of the joining method which manufactures the joined body of this invention. It is sectional drawing which shows the working state of the filling raw material supply of the solidification state in the filling / heating process same as the above. It is sectional drawing which shows the working state which obtains the filling raw material of a molten state in the filling heating process same as the above. It is sectional drawing which shows the working state of the filler formation in the cooling process same as the above. It is sectional drawing which shows the working state which takes out a joined body after cooling in the cooling process same as the above.

(Embodiment 1 of bonded body)
1 and 2 show a first embodiment of a bonded body in which a metal molded body and a synthetic resin molded body are bonded, which will be described below.

1 and 2, the metal molded body 1 is a metal material (plating) such as iron (containing alloy), titanium (containing alloy), magnesium (containing alloy), copper (containing alloy), aluminum (containing alloy), and stainless steel. (Including treatment, rust-prevention treatment and painting treatment), a flat plate is illustrated, but a three-dimensional shape may be used. Further, the synthetic resin molded body 2 is made of a thermoplastic resin material such as polypropylene resin (PP), polyethylene resin (PE), polyamide resin (PA), polyphenylene sulfide resin (PPS), polybutylene terephthalate resin (PBT) (fibrous or The material may be a particulate glass material, an inorganic material, or carbon) and may be a flat plate, but may be a three-dimensional shape. A plurality of (four in FIG. 2) cylindrical through-holes 21 are formed in the synthetic resin molded body 2, and the through-holes 21 have a filling material 3. The hole diameter and the interval (pitch) between the through holes 21 are set depending on the application of the bonded body, and even if the molded body is large, the metal molded body 1 and the synthetic resin molded body 2 are bonded for each through hole 21, This is so-called spot joining, and a joined body of the metal molded body 1 and the synthetic resin molded body 2 can be obtained by a simple work even for the joining work of a large joined body. Further, the through hole 21 of the synthetic resin molded body 2 has a perfect circular cross section, but may be an elliptical or rectangular tube. Further, as the cylinder whose inner peripheral wall is bent, a drum-shaped cylinder whose end surface has a small diameter is illustrated, but a cylinder having a plurality of uneven surfaces may be used. Furthermore, for example, the cross-sectional shape of the through hole 23 as shown in FIGS. 19 to 22 may be a trapezoidal shape with an end surface having a large diameter.

On the joint surface 11 on the surface of the metal molded body 1 where the metal molded body 1 and the synthetic resin molded body 2 are bonded, a surface that is firmly bonded to the filler 3 at a position corresponding to the through hole 21 of the synthetic resin molded body 2. The bonding region 4 is formed by performing a surface treatment such as a surface roughening treatment, a metal oxide film treatment, or a treatment with a coupling agent. The metal molded body 1 and the synthetic resin molded body 2 are bonded to each other through the filler 3 bonded to the bonding region portion 4 in the through hole 21. The material of the filler 3 is a thermoplastic resin or a curable resin by heat, light or a chemical reaction. Examples of the thermoplastic resin include thermoplastics such as polypropylene resin (PP), polyethylene resin (PE), polyamide resin (PA), polyphenylene sulfide resin (PPS), and polybutylene terephthalate resin (PBT) exemplified in the synthetic resin molded body 2. Examples of the material include a resin material (which may contain a fibrous or particulate glass material, an inorganic material, or carbon). Further, as the curable resin by heat, light or chemical reaction, phenol resin (PF), epoxy resin (EP), melamine resin (MF), urea resin (urea resin: UF), unsaturated polyester resin (UP), Examples thereof include materials such as alkyd resin, polyurethane (PUR), and thermosetting polyimide (PI) (which may contain a fibrous or particulate glass material, an inorganic material, or carbon). Since the filler 3 is formed in the through hole 21 in which the inner peripheral wall has a curved shape, the filler 3 is synthesized so as not to come out in the direction away from the metal molded body 1 even if the inner peripheral wall is not roughened. It is held in the through hole 21 of the resin molded body 2. In this way, the filler 3 is held in the through hole 21 of the synthetic resin molded body 2 so as not to come out in the direction away from the metal molded body 1 while being bonded to the bonding region portion 4 in the through hole 21 and filled. Since the metal molded body 1 and the synthetic resin molded body 2 are bonded to each other via the material 3, the metal molded body 1 on the surface of the metal molded body 1 and the synthetic resin molded body 2 are bonded at the bonding surface 11. The resin molded body 2 is joined without being melted. In this case, the filler 3 is held in the through hole 21 of the synthetic resin molded body 2 so that the filler 3 is bonded to the bonding region portion 4 in the through hole 21 and does not come out in the direction away from the metal molded body 1. The inner peripheral wall of the through hole 21 is in a bent shape and the filler 3 is held in the through hole 21, but when the inner peripheral wall of the through hole 21 is not in a bent shape, the through hole 21 has a cross-sectional shape. The trapezoidal shape with the end surface having a large diameter, the inner peripheral wall of which is roughened, or the material of the synthetic resin molded body 2 and the material of the filler 3 may be selected. When selecting this material, both materials may be made of the same synthetic resin. Alternatively, if the synthetic resin molded body 2 is made of a thermoplastic resin, the material of the filler 3 is a thermoplastic resin having a higher melting point than that of the synthetic resin molded body 2 (for example, polyethylene resin (PE)) (for example; The material of the synthetic resin molding 2 and the material of the filler 3 may be selected by combining polypropylene resin (PP).

(Embodiment 2 of bonded body)
3 and 4 show a second embodiment of a joined body in which a metal molded body and a synthetic resin molded body are joined, and have the same configuration as that of the first embodiment of the joined body. A different configuration will be described.

In FIGS. 3 and 4, the shapes and materials of the metal molded body 1 and the synthetic resin molded body 2 are the same as those in the first embodiment of the joined body. A plurality of (four in FIG. 2) cylindrical through holes 22 are formed in the synthetic resin molded body 2 as in the first embodiment of the joined body, and even if the molded body is large, each through hole 22 is formed. The metal molded body 1 and the synthetic resin molded body 2 are bonded to each other, which is so-called spot bonding, and the metal molded body 1 and the synthetic resin molded body 2 can be easily bonded to each other with a large bonded body. A joined body is obtained. The through hole 22 of the synthetic resin molded body 2 is a cylinder having a perfect circular cross section, and surface treatment such as surface roughening treatment is performed on the inner peripheral wall thereof so as to firmly bond the filler 3 to the filler 3. In this case, the cross-section of the through-hole 22 is illustrated as a perfect circle, but it may be a cylinder having an elliptical or rectangular cross-section or a trapezoidal cylinder having a large end surface. The inner peripheral wall may have a bent shape. Further, although not shown, it is preferable that the surface (upper surface in FIG. 3) 2A of the synthetic resin molded body 2 is also subjected to formation of an uneven surface and surface treatment.

Similar to the first embodiment of the bonded body, at the position corresponding to the through hole 22 of the synthetic resin molded body 2 on the bonding surface 11 on the surface of the metal molded body 1 where the metal molded body 1 and the synthetic resin molded body 2 are bonded. The joining region 4 is formed by performing a surface treatment for firmly joining with the filling material 3, for example, a surface treatment of roughening treatment, metal oxide film treatment, or treatment with a coupling agent. The filling material 3 is made of a material of a thermoplastic resin or a curable resin by heat, light, or a chemical reaction as in the first embodiment of the joined body, and is formed in the through hole 22 of the synthetic resin molded body 2 with the joint region portion 4. They are joined together and also joined to the inner peripheral wall of the through hole 22, and are held in the through hole 22 of the synthetic resin molded body 2 so as not to come out in the direction away from the metal molded body 1. In this case, since the filler 3 has the annular wall 3A protruding from the surface 2A of the synthetic resin molded body 2, it is preferable that the filler 3 is also bonded to the surface 2A of the synthetic resin molded body 2. In this way, since the metal molded body 1 and the synthetic resin molded body 2 are bonded to each other through the filler 3 bonded to the bonding region portion 4 in the through hole 22, the metal molding on the surface of the metal molded body 1 is performed. At the joint surface 11 where the body 1 and the synthetic resin molded body 2 are bonded, the synthetic resin molded body 2 is bonded without being melted.

(Explanation of the action of forming a joined body of a metal molded body and a synthetic resin molded body)

FIG. 5 shows a sectional view of a working state in which a filling raw material is supplied to a synthetic resin molded body in order to obtain a bonded body for bonding a metal molded body of the present invention and a synthetic resin molded body. Surface treatment is performed on predetermined areas of the joint surfaces 11 and 12 on the surface of the metal molded body 1 where the metal molded body 1 and the synthetic resin molded body 2 are bonded without using caulking connection with rivets or fastening with screws or bolts. It is a joined body that is formed into a joining region portion 4 that is joined to the synthetic resin molded body 2, and through holes 21, 22, 23 formed in the synthetic resin molded body 2 corresponding to the joining region portion 4. The melted filling material 30 or the solidified filling material 300 to be melted is supplied to the metal molded body 1 and the synthetic resin molded body 2 through the filler 3 obtained by filling in the molten state and then solidifying. It is a joined body to be joined. Thus, the filler 3 is interposed so that the metal molded body 1 and the synthetic resin molded body 2 are bonded to each other, so that the synthetic resin molded body 2 is melted at the bonding surfaces 11 and 12 of the metal molded body 1. It produces the effect of being joined together. In order to make this effect effective, when the metal molded body 1 and the synthetic resin molded body 2 are bonded through the filler 3, the filler 3 is firmly bonded to the bonding surfaces 11 and 12 of the metal molded body 1. The filler 3 is held in the through holes 21, 22, and 23 by the formation of the joining region portion 4 and the treatment of the through holes 21, 22, and 23 in the synthetic resin molded body 2, and is separated from the metal molded body 1. I try not to get out in the direction. The processing of the through holes 21, 22, 23 in the synthetic resin molded body 2 is performed for the purpose of firmly joining the through holes 21, 22, 23 with the shape or cross section of the inner peripheral wall or the filler 3 on the inner peripheral wall. Either surface treatment or selection of materials for the synthetic resin molded body 2 and the filler 3 or combination thereof may be performed. In this case, the filler 3 may be on the surface 2A (FIGS. 3 and 4) of the synthetic resin molded body 2 including the through holes 21, 22, 23. Further, the filler 3 is interposed so that the metal molded body 1 and the synthetic resin molded body 2 are bonded to each other, so that the metal molded body 1 and the synthetic resin molded body 2 on the surface of the metal molded body 1 are bonded. The surface treatment is performed on the bonding area portion 4 of the metal molded body 1 by producing the function of bonding the synthetic resin molded body 2 without melting on the bonding surfaces 11 and 12, and this surface treatment is In FIG. 5, only the bonding area portion 4 is performed, but as shown in FIG. 14 of the second embodiment of the bonding method, it may be performed on the entire surface, that is, a portion other than the bonding area portion 4. 12 has a flat surface (upper surface in FIG. 5) of the metal molded body 1, but if the surface treatment is performed, a recess or a through hole is formed in the bonding area portion 4 of the metal molded body 1. It may be.

Further, in FIG. 5, after the molten filling material 30 or the filling material 300 to be melted is supplied to the through holes 21, 22, and 23 formed in the synthetic resin molded body 2, the molten material is changed from the molten state to the solidified state, and then the filling material. When the molten filling material 30 is supplied into the through holes 21, 22, 23 when obtaining 3, the filling material 30 in the molten state is filled in the through holes 21, 22, 23 by filling under reduced pressure. It is preferable that the inside of the joint region 4 and the inner peripheral walls of the through holes 21, 22, and 23 be firmly joined to each other by filling the inside without any gaps and making it difficult to generate bubbles during solidification.

(Embodiment 1 of a joining method for producing a joined body of a metal molded body and a synthetic resin molded body)
6 to 12 show a first embodiment of a joining method capable of manufacturing a joined body of a metal molded body and a synthetic resin molded body by a simple operation, which will be described below.

FIG. 6 shows a work process including a laminating process 101, a surface treatment process 102, a filling / heating process 103, and a cooling process 104, which are performed in this order to obtain a bonded body. In the laminating step 101, the metal molded body 1 and the synthetic resin molded body 2 in which the through holes 21 are formed are laminated, and in the surface treatment step 102, a surface treatment for firmly bonding the filler 3 to the filler 3, for example, a rough surface. Surface treatment such as chemical treatment, metal oxide film treatment, or treatment with a coupling agent is performed to form the bonding region portion 4. In the filling / heating step 103, the filling raw material 30 is supplied to the through hole 21 and is reduced in pressure. The filling raw material 30 in a molten state is filled in the through holes 21, and in the cooling step 104, the filling raw material 30 is cooled to be solidified and solidified, and the filling material 3 joined to the joining region portion 4 is the through holes. 21.

In FIG. 7, the metal molded body 1 is installed in the lower mold B, and the position of the surface of the metal molded body 1 facing the joint surface 11 where the metal molded body 1 and the synthetic resin molded body 2 are bonded (FIG. In FIG. 7, the synthetic resin molded body 2 having the through holes 21 is transferred from above (in the direction of arrow 7) in the arrow direction, and the synthetic resin molded body 2 having the through holes 21 is placed on the metal molded body 1.

In FIG. 8, a metal molded body 1 and a synthetic resin molded body 2 are laminated by an upper mold A and a lower mold B, and the surface of the metal molded body 1 is irradiated with a laser beam L from a through hole 21 to form a metal molded body. A surface treatment for firmly joining the filler 3 to the joining surface 11 where the metal molded body 1 and the synthetic resin molded body 2 on the surface of 1 are joined, for example, by roughening treatment, metal oxide film treatment, or a coupling agent. The bonding area 4 is formed by performing a surface treatment.

In FIG. 9, the inside of the through hole 21 is decompressed by the evacuation device C in a state where the metal molding 1 and the synthetic resin molding 2 are laminated by the upper mold A and the lower mold B.

In FIG. 10, while the inside of the through hole 21 is depressurized, the molten raw material 30 is supplied to the through hole 21 by the nozzle D, and the metal molding 1 and the synthetic resin molding are formed by a heating jig (not shown). The filling material 30 is filled in the through holes 21 in a molten state by being heated at a temperature at which the body 2 is not melted. The material of the filling raw material 30 can be exemplified by a thermoplastic resin or a curable resin by heat, light, or a chemical reaction, but in the case of a curable resin by heat, light, or a chemical reaction, heating work may not be performed.

In FIG. 11, by cooling the metal molded body 1 and the synthetic resin molded body 2 in a stacked state, the filling raw material 30 filled in the through hole 21 in a molten state is cooled and the solidified filling material 3 is joined. It is joined to the region portion 4 and provided in the through hole 21. In this case, since the through hole 21 is formed in a cylinder whose inner peripheral wall is bent, the solidified filler 3 is retained in the synthetic resin molded body 2 so as not to come out in the direction away from the metal molded body 1. Although the cross-section of the through hole 21 is a perfect circle, it may be a cylinder having an elliptical shape or a rectangular shape in that case. It is closely bonded to the filler 3 by forming a surface treatment such as a surface roughening treatment.

In FIG. 12, the metal molded body 1 is moved in the arrow direction (downward in FIG. 12) and separated from the lower mold B, and the synthetic resin molded body 2 is moved in the arrow direction (upward in FIG. 12) to the upper mold. Separated from A, a bonded body is obtained in which the metal molded body 1 and the synthetic resin molded body 2 are bonded to each other through the filler 3 provided in the through hole 21 shown in FIG.

In the filling / heating step 103, the inside of the through hole 21 is depressurized to fill the molten filling material 30 to reduce the bubbles generated in the filling material 3 in the process of solidifying the filling material 30 filled in the through hole 21. The filling performance of the metal molding 1 and the synthetic resin molding 2 is improved by preventing the filling material 3 from making it difficult to closely bond to the inner peripheral wall of the through hole.

(Embodiment 2 of a joining method for producing a joined body of a metal molded body and a synthetic resin molded body)
FIG. 13 shows a second embodiment of a joining method capable of manufacturing a joined body of a metal molded body and a synthetic resin molded body by a simple operation. In the first embodiment of the joining method, the metal molded body 1 and the metal molded body 1 are combined in a laminating step 101. Although the joining surface on the surface of the metal molded body 1 was subjected to the surface treatment in the surface treatment step 102 after laminating with the resin molded body 2, in the second embodiment of the joining method, the metal molded body 1 is subjected to the surface treatment step 102. After performing the surface treatment on the joint surface 12 on the surface, the metal molding 1 and the synthetic resin molding 2 are laminated in the laminating step 101, and in the filling / heating step 103, as in Embodiment 1 of the joining method. The filling raw material 30 is supplied to the through hole 21, and the filling raw material 30 in a molten state is filled under reduced pressure into the through hole 21, and in the cooling step 104, the filling raw material 30 is cooled and solidified, This is a working process in which the filling material 3 bonded to the bonding region portion 4 in the through hole 21 is provided in the through hole 21.

In FIG. 14, a surface treatment for firmly bonding the filler 3 to the entire surface of the bonding surface 12 where the metal molding 1 and the synthetic resin molding 2 on the surface of the metal molding 1 placed in the lower mold B are bonded, For example, through the through hole 21 from the position (upper side in FIG. 14) facing the bonding surface 12 of the metal molded body 1 in a state where the surface treatment is performed such as roughening treatment, metal oxide film treatment, or treatment with a coupling agent. The synthetic resin molded body 2 in which is formed is transferred in the direction of the arrow, placed on the metal molded body 1, and laminated.

In FIG. 15, the metal molding 1 and the synthetic resin molding 2 are stacked in the upper mold A and the lower mold B, and the inside of the through hole 21 is decompressed by the vacuuming device C, and the bonding method is used although not shown. In the same manner as shown in FIG. 10 of the first embodiment, the filling raw material 30 in a molten state is supplied to the through hole 21, and is heated at a temperature at which the metal molded body 1 and the synthetic resin molded body 2 do not melt to be filled in the molten raw material. The through hole 21 is filled with 30. The material of the filling raw material 30 is a thermoplastic resin or a curable resin by heat, light, or a chemical reaction as in Embodiment 1 of the joining method, but the metal molding 1 on the surface of the metal molding 1 and the synthetic resin molding A portion corresponding to the through hole 21 on the joint surface 12 to which the body 2 is joined is the joint region portion 4. In this case, instead of performing the surface treatment on the entire bonding surface 12 of the metal molded body 1, as shown in FIG. 8 of the first embodiment of the bonding method, by irradiating the laser beam L through the through hole 21, the metal molded body is irradiated. It is also possible to perform surface treatment on the first joint surface (joint surface 11 in FIG. 8) to form the joint region portion 4.

Although not shown, the molten raw material 30 filled in the through hole 21 is cooled in the same manner as in FIG. 11 of the first embodiment of the joining method, and the metal 3 is inserted through the filler 3 provided in the through hole 21. A joined body obtained by joining the molded body 1 and the synthetic resin molded body 2 is obtained. In the second embodiment of the joining method as well, as in the first embodiment of the joining method, the inner peripheral wall of the through hole of the through hole 21 is formed of a bent cylinder, but the cross section is a perfect circle or an ellipse. It may be a tube having a shape or a rectangular shape or a trapezoidal tube having a large end surface in its cross-sectional shape.

(Embodiment 3 of a joining method for producing a joined body of a metal molded body and a synthetic resin molded body)
16 and 17 show a third embodiment of a joining method for obtaining a joined body by a simple work based on the working process shown in FIG. 6 of the first embodiment of the joining method, which will be described below.

FIG. 16 shows a working state of supplying the filling raw material in the filling and heating step, in which the metal molded body 1 and the synthetic resin molded body 2 are laminated by the upper mold A and the lower mold B, and the synthetic resin molding is performed by the vacuuming device C. The inside of the through hole 22 of the body 2 and the surface 2A of the synthetic resin molded body 2 are decompressed, and the nozzle D is supplied to the through hole 22 and the surface 2A of the synthetic resin molded body 2 to supply the filling material 30 in a molten state, and heat treatment With a tool (not shown), the metal molding 1 and the synthetic resin molding 2 are heated at a temperature at which they do not melt so that the filling material 30 projects in the molten state onto the through holes 22 and the surface 2A of the synthetic resin molding 2. Is filled. In this case, the through-hole 22 of the synthetic resin molded body 2 is formed of a cylinder having a perfect circular cross section, and the inner peripheral wall of the through-hole 22 has a bent shape so as to be firmly bonded to the filler 3 or a roughening treatment. The surface treatment is preferably performed, and preferably the surface 2A of the synthetic resin molded body 2 is also similarly subjected to surface treatment such as uneven surface formation and roughening treatment so as to firmly bond with the filler 3. There is.

FIG. 17 shows a working state in which the metal molded body 1 and the synthetic resin molded body 2 are cooled in a laminated state in the cooling step, and the filling raw material filled in the through hole 22 and the surface 2A of the synthetic resin molded body 2 in a molten state. 30 is cooled and the solidified filler 3 is bonded to the bonding region portion 4 as shown in Embodiment 2 of the bonded body, and the annular wall 3A protruding in the through hole 22 and on the surface 2A of the synthetic resin molded body 2 is formed. A bonded body is obtained in which the metal molded body 1 and the synthetic resin molded body 2 are bonded via the filler 3 formed. In this case, although the through hole 22 is formed of a cylinder having a perfect circular cross section, it may be an elliptical cylinder or a rectangular cylinder, or may have a shape in which the inner peripheral wall is bent as in Embodiment 1 of the joining method. It may be a cylinder or a trapezoidal cylinder whose end face has a large diameter in its cross-sectional shape as in Embodiment 4 of the joining method.

(Embodiment 4 of a joining method for producing a joined body of a metal molded body and a synthetic resin molded body)
18 to 22 show Embodiment 4 of the joining method. In the joining method of Embodiments 1 to 3 of the joining method, instead of the filling raw material supplied to the through hole in a molten state, the filling raw material in the solidified state is used as the through hole. This is a joining method in which a joined body of a metal molded body and a synthetic resin molded body is obtained by a simple operation by supplying and making the molten state in the through hole and then solidifying the molten state, which will be described below.

18, in the steps up to the filling / heating step 103, the metal compact 1 and the synthetic resin compact 2 are laminated in the laminating step 101 as in the first embodiment of the joining method, and the metal compact in the surface treatment step 102. The bonding area portion 4 is formed by performing surface treatment for strongly bonding the filler 3 on the bonding surface 11 of No. 1, for example, surface treatment such as roughening treatment, metal oxide film treatment, or treatment with a coupling agent. Alternatively, as in the second embodiment of the joining method, the surface 11 is subjected to the surface treatment in the surface treatment step 102, and the surface treatment is performed in the laminating step 101 to form the composite with the metal article 1. You may make it laminate | stack with the resin molding 2. Next, in the filling / heating step 103, the filling raw material 300 made of the solidified thermoplastic resin is supplied to the through holes 23, and the filling raw material 300 is melted to obtain the molten filling raw material 30. In the cooling step 104, the through-hole 23 is filled with 30 and the filler 3 that is solidified by cooling the molten filling material 30 is provided in the joining region portion 4 in the cooling step 104.

In FIG. 19, the joining surface 11 of the metal molded body 1 is subjected to a surface treatment for firmly joining it to the filler 3, for example, a surface treatment such as a roughening treatment, a metal oxide film treatment, or a treatment with a coupling agent. The region portion 4 is formed, and the through hole 23 of the synthetic resin molded body 2 is formed by a trapezoidal tube whose cross-sectional shape has a large diameter end face, and the filler 3 is joined in the through hole 23 in the joining region portion. 4 and the metal molded body 1 are prevented from coming out in a direction away from the metal molded body 1. Also in this through hole 23, since it is held in the through hole 23 of the synthetic resin molded body 2 as described above, the inner peripheral wall of the through hole 23 is formed into a bent tube or a rough inner peripheral wall thereof. Either the surface treatment may be performed or the material of the synthetic resin molded body 2 and the material of the filler 3 may be selected, or a combination thereof may be used instead. In the state in which the metal molded body 1 and the synthetic resin molded body 2 thus formed are stacked by the upper mold A and the lower mold B, the filling raw material 300 in a solidified state is supplied to the through holes 21.

In FIG. 20, in a state where the metal molded body 1 and the synthetic resin molded body 2 are laminated by the upper mold A and the lower mold B, the solidified filling material 300 is heated by, for example, irradiating the laser light L serving as a heat source. And put it in a molten state. The material of this filling material 300 is a thermoplastic resin.

In FIG. 21, the filling raw material 300 supplied into the through hole 23 in the state where the metal molded body 1 and the synthetic resin molded body 2 are stacked in the upper mold A and the lower mold B in this way is cooled, As shown in FIG. 3, the upper mold A and the lower mold B are transported in the arrow direction, and the filler 3 provided in the through hole 23 is joined to the joint region portion 4 and the inner peripheral wall of the through hole 23. A bonded body in which the metal molded body 1 and the synthetic resin molded body 2 are bonded to each other is obtained.

INDUSTRIAL APPLICABILITY The present invention is useful for joining large molded articles such as joining a panel made of a synthetic resin material of a vehicle body and a panel made of a metal material.

DESCRIPTION OF SYMBOLS 1 Metal molded body 2 Synthetic resin molded body 3 Filler 4 Joining area part 11, 12 Joining surface 30, 300 Filling raw material

Claims (9)

A joined body in which a metal molded body and a synthetic resin molded body are joined together via a filler, and in the joint surface where the metal molded body and the synthetic resin molded body on the surface of the metal molded body are joined, The joining region portion is formed by performing a surface treatment for firmly joining with the filling material, the synthetic resin molded body includes a through hole formed corresponding to the joining region portion, and the joining is performed in the through hole. A bonded body of a metal molded body and a synthetic resin molded body, characterized in that the metal molded body and the synthetic resin molded body are bonded together via a filler bonded to the region portion. The joined body of the metal molded body and the synthetic resin molded body according to claim 1, wherein an inner peripheral wall of the through hole of the synthetic resin molded body has a bent shape. The joined body of a metal molded body and a synthetic resin molded body according to claim 1, wherein the through hole of the synthetic resin molded body has a trapezoidal shape in which a cross-sectional shape has a large end surface. The joined body of a metal molded body and a synthetic resin molded body according to any one of claims 1 to 3, wherein the filler is made of a thermoplastic resin. The joined body of a metal molded body and a synthetic resin molded body according to any one of claims 1 to 3, wherein the filler is made of a curable resin by heat, light or a chemical reaction. A manufacturing method for obtaining a joined body of a metal molded body and a synthetic resin molded body according to any one of claims 1 to 5 is a laminating step of laminating a metal molded body and a synthetic resin molded body in which a through hole is formed. And a surface treatment step of forming a bonding region portion on the metal molded body, and supplying a filling raw material to the through hole in a state where the metal molding and the synthetic resin molded body are laminated to melt the filling raw material into the through hole. And a heating step of cooling the metal molded body and the synthetic resin molded body to obtain a filler bonded to the bonding region in the through hole. A manufacturing method for obtaining a joined body of a molded body and a synthetic resin molded body. The manufacturing method for obtaining a joined body of a metal molded body and a synthetic resin molded body according to claim 6, wherein in the filling / heating step, the inside of the through hole is depressurized by vacuuming to fill the molten raw material. Method. The metal forming body according to claim 6 or 7, wherein in the surface treatment step, a surface treatment for firmly joining the filler to the filler is performed on the joint surface of the metal forming body to form a joining region portion. A manufacturing method for obtaining a joined body with a synthetic resin molded body. By applying the surface treatment step in a state in which the metal molded body and the synthetic resin molded body in the stacking step are stacked, by irradiating the laser beam through the through hole of the synthetic resin molded body, at the joint surface of the metal molded body The method for producing a bonded body of a metal molded body and a synthetic resin molded body according to claim 6 or 7, wherein the bonded region portion is formed by performing a surface treatment for firmly bonding with the filler.