JP5788836B2 - Composite molded body and manufacturing method thereof - Google Patents

Description

  The present invention relates to a composite molded body composed of a metal molded body and a resin molded body, and a method for producing the same.

From the viewpoint of reducing the weight of various parts, resin molded bodies are used as metal substitutes, but it is often difficult to substitute all metal parts with resin. In such a case, it is conceivable to manufacture a new composite part by joining and integrating the metal molded body and the resin molded body.
However, a technique capable of joining and integrating a metal molded body and a resin molded body with an industrially advantageous method with high bonding strength has not been put into practical use.

Patent Document 1 discloses a laser on a metal surface for bonding to a different material (resin), including a step of laser scanning with respect to a metal surface in one scanning direction and a step of laser scanning in a scanning direction crossing the scanning direction. An invention of a processing method is described.
Patent Document 2 discloses an invention of a laser processing method in which the laser scanning is performed in a superposed manner a plurality of times in the invention of Patent Document 1.

However, since the inventions of Patent Documents 1 and 2 must always perform laser scanning in two crossing directions, there is room for improvement in that the processing time is too long.
Furthermore, since sufficient surface roughening treatment can be performed by laser scanning in the cross direction, it is considered that the bonding strength can be increased, but the surface roughness state is not uniform, and the directionality of the strength of the bonded portion between the metal and the resin There is a problem that may not be stable.
For example, one joined body has the highest shearing force and tensile strength in the X-axis direction, while the other joined body has the highest shearing force and tensile strength in the Y-axis direction different from the X-axis direction. There is a possibility that the bonded body of the above may have the highest shearing force and tensile strength in the Z-axis direction different from the X-axis and Y-axis directions.
Depending on the product (for example, a rotating body part in one direction or a reciprocating part in one direction), a metal / resin composite having high bonding strength in a specific direction may be required. In the invention of 2, the above-mentioned demand cannot be sufficiently met.

  In addition, when the joint surface has a complicated shape or a shape including a narrow portion (for example, a star shape, a triangle, or a dumbbell type), the surface is partially roughened by the laser scanning method in the cross direction. As a result of non-uniformity, it may be considered that sufficient bonding strength cannot be obtained.

Patent Document 3 describes a method of manufacturing an electrical / electronic component in which a metal surface is irradiated with laser light to form irregularities, and a resin, rubber, or the like is injection-molded on the irregularity formation site.
In Embodiments 1 to 3, it is described that the metal long coil surface is irradiated with laser to form irregularities. In paragraph No. 10, the surface of the long metal coil is roughened in a striped or satin shape. In paragraph No. 19, the surface of the long metal coil is striped, dotted, wavy, knurled, or satin. It is described.
However, as described in the effects of the inventions in paragraphs 21 and 22, the purpose of laser irradiation is to form fine irregular irregularities on the metal surface, thereby enhancing the anchor effect. In particular, since the object to be processed is a long metal coil, it is considered that any irregularities are inevitably formed into fine irregular irregularities.
Therefore, the invention of Patent Document 3 discloses the same technical idea as the invention of forming fine irregularities on the surface by laser irradiation in the cross direction as in Patent Documents 1 and 2.

Japanese Patent No. 4020957 JP 2010-167475 A JP-A-10-294024

An object of the present invention is to provide a composite molded body having a higher bonding strength.
Moreover, this invention makes it another subject to provide the manufacturing method of the said composite molded object.

The present invention
A composite molded body in which a metal molded body and a resin molded body are joined,
The metal molded body has at least one of pores and grooves in a plane serving as a bonding surface,
At least one of the pores and grooves is formed by laser irradiation in an oblique direction with respect to the plane,
Provided is a composite molded body in which the composite molded body is joined in a state in which a resin enters an inside of at least one of pores and grooves in an oblique direction of the metal molded body, and a method for manufacturing the same. .

The present invention also provides
A composite molded body in which a metal molded body and a resin molded body are joined,
The metal molded body has at least one of pores and grooves on a curved surface serving as a joining surface,
At least one of the pores and grooves is formed by laser irradiation on the curved surface,
The laser irradiation is a laser irradiation so as to be in an oblique direction with respect to a plane contacting the curved surface,
Provided is a composite molded body in which the composite molded body is joined in a state in which a resin enters an inside of at least one of pores and grooves in an oblique direction of the metal molded body, and a method for manufacturing the same. .

  According to the composite molded body and the manufacturing method thereof of the present invention, the bonding strength between the metal molded body and the resin molded body can be increased.

Sectional drawing of one Embodiment of a composite molded object. (A) is a fragmentary sectional view of the metal molded object used in FIG. 1, (b) is a fragmentary sectional view of the metal molded object of another embodiment. (A) is the fragmentary top view of the metal molded object used in FIG. 1, (b) is explanatory drawing of the occupation rate of a pore. (A) is explanatory drawing of the manufacturing process of the composite molded object of FIG. 1, FIG. 2 (a), (b) is explanatory drawing of the manufacturing process of the composite molded object of FIG. 1, FIG.2 (b). (A) is explanatory drawing of the manufacturing process of the composite molded object different from the composite molded object of FIG. 1, (b) is explanatory drawing of the manufacturing process of the composite molded object different from the composite molded object of (a). Explanatory drawing of the manufacturing process of the composite molded object further different from the composite molded object of FIG. The partial top view of the metal molded object used with the composite molded object further different from the composite molded object of FIG. FIG. 8 is a partial cross-sectional view of FIG. 7. The partial top view of the metal molded object used with the composite molded object further different from the composite molded object of FIG. FIG. 10 is a partial cross-sectional view of FIG. 9. The partial top view of the metal molded object used with the composite molded object further different from the composite molded object of FIG. FIG. 12 is a partial cross-sectional view of FIG. 11. Explanatory drawing of an effect | action of the composite molded object (Example) of FIG. Explanatory drawing of an effect | action of another composite molded object (comparative example). Explanatory drawing of a tension test. Explanatory drawing of a bending test.

<Composite molded body>
A composite molded body 1 in FIG. 1 is obtained by joining and integrating a metal molded body 10 and a resin molded body 20.
FIG. 1 shows a composite molded body 1 composed of a flat metal molded body 10 and a flat resin molded body 20, but the shape and size of the metal molded body 10 and the resin molded body 20 depend on the application. It is appropriately selected.

As shown in FIGS. 2 (a) and 3 (a), the metal molded body 10 used in the composite molded body 1 has a plurality of pores 12 on a flat surface 11 (11a) serving as a bonding surface. It is.
The joint surface is a surface where the metal molded body 10 and the resin molded body 20 are in contact with each other, and a surface that does not have the pores 12 (a surface not surrounded by a1 and a2 in FIG. 3B). Is included.
Although the plane 11 and the plane 11a are the same plane, the plane 11 is a surface outside the range where the pores 12 are formed (the surface not surrounded by a1 and a2 in FIG. 3B). The flat surface 11a is a surface within the range in which the pores 12 are formed (a rectangular surface surrounded by a1 and a2 in FIG. 3B).
As shown in FIG. 2A, the plurality of pores 12 are perforated in an oblique direction with respect to the plane 11 (11a).
The metal molded body 10 and the resin molded body 20 are firmly joined in a state where the resin enters the slanted pores 12 of the metal molded body 10 (the state where the resin intrusion portion 30 exists). .
The pore 12 may be a groove having continuous pores, or may be both a pore and a groove.

As shown in FIG. 2B, the metal molded body 10 used in the composite molded body 1 may have a plurality of pores 12 in the concave flat surface 11a serving as a bonding surface.
The concave flat surface 11 a is a flat surface that is entirely recessed from the flat surface 11.
The plane 11 is a surface outside the range in which the pores 12 are formed (the surface not surrounded by a1 and a2 in FIG. 3B), and the recess plane 11a is in the range in which the pores 12 are formed. (In FIG. 3B, the surface surrounded by a1 and a2).
As shown in FIG. 2 (b), the plurality of pores 12 are perforated in an oblique direction with respect to the recess plane 11a.
The metal molded body 10 and the resin molded body 20 are in a state where the resin has entered both the recessed flat surface 11a of the metal molded body 10 and the slanted pores 12 (the state where the resin intrusion portion 30 exists). It is firmly joined with.
The pore 12 may be a groove having continuous pores, or may be both a pore and a groove.

In the composite molded body 1 shown in FIGS. 1 and 2, the metal molded body 10 and the resin molded body 20 are bonded and integrated with each other, but curved surfaces may be bonded and integrated.
Even in the composite molded body 1 in which the curved surfaces are joined and integrated, the resin has entered the slanted pores 12 (or both in the concave flat surface 11a and the slanted pores 12) (resin intrusion). In a state in which the portion 30 is present).

<Method for producing composite molded body-1>
Next, the manufacturing method of the composite molded object 1 shown in FIG. 1 is demonstrated.
As shown in FIG. 4A, the pores 12 shown in FIGS. 2A and 3A are formed on the plane 11 of the metal molded body 10a (the metal molded body before the pores 12 are formed). On the other hand, it is formed by irradiating laser (L) in an oblique direction.
At this time, the angle α formed by the plane 11 and the irradiation direction of the laser (L) is an acute angle, preferably 15 to 85 °, and more preferably 25 to 75 °.

The size D of the openings of the pores 12 shown in FIGS. 2A and 3A is preferably 10 to 300 μm, more preferably 30 to 300 μm, when the openings are square. It is preferable for D to be in the above range because the resin can easily enter during bonding.
When the opening is rectangular, circular, or other shape, it is preferable that the opening has the same area as that of a square.

The distance (H) between adjacent pores 12 shown in FIG. 3A is preferably in the range of 150 μm or less, and more preferably in the range of 100 μm or less.
The interval (H) between adjacent pores 12 may not be equal as long as it is within the above range.

  The depth (length) F from the flat surface 11 to the pore bottom 13 of the pore 12 shown in FIG. 2A is preferably 15 to 750 μm, and more preferably 50 to 450 μm. It is preferable that F is in the above range because the bonding strength between the metal molded body 10 and the resin molded body 20 in the composite molded body 1 is increased.

Instead of forming a large number of independent pores 12 as shown in FIGS. 2A and 3A, for example, in FIG. 3A, grooves that are continuous in columns or rows may be formed. In addition, both pores and grooves can be formed.
The number of the pores 12 can be set according to the use of the composite molded body, the bonding strength required for the composite molded body, and the like, as shown in FIG. The area (occupancy) occupied by the openings of the pores 12 in the range in which the pores are formed (the square range indicated by the solid lines surrounded by a1 and a2 in FIG. 3B) is in the range of 10 to 95%. Can be.
The total volume (per 1 mm ² ) of the pores 12 is preferably in the range of 10 × 10 ⁻³ mm ³ to 600 × 10 ⁻³ mm ³ .

As shown in FIG. 4 (b), the pores 12 shown in FIGS. 2 (b) and 3 (a) are formed in the concave plane 11a of the metal molded body 10a (the metal molded body before the pores 12 are formed). On the other hand, it is formed by irradiating laser (L) in an oblique direction.
In addition, in the state which formed the recessed part flat surface 11a in the metal forming body 10a previously, a laser irradiation is performed with respect to the recessed part flat surface 11a, and the laser irradiation is performed with respect to the flat surface 11 of the metal forming body 10a. Any method of forming the concave plane 11a and the pores 12 can be applied.
At this time, the angle α formed by the plane 11 and the irradiation direction of the laser (L) is an acute angle, preferably 15 to 85 °, and more preferably 25 to 75 °.

The size D of the opening of the pore 12 shown in FIGS. 2B and 3A is preferably 10 to 300 μm and more preferably 30 to 300 μm when the opening is square. It is preferable for D to be in the above range because the resin can easily enter during bonding.
When the opening is rectangular, circular, or other shape, it is preferable that the opening has the same area as that of a square.

The distance (H) between adjacent pores 12 shown in FIG. 3B is preferably in the range of 150 μm or less, and more preferably in the range of 100 μm or less.
The interval (H) between adjacent pores 12 may not be equal as long as it is within the above range.

The depth (length) F1 from the recess flat surface 11a of the pore 12 to the pore bottom 13 shown in FIG. 2B is preferably 15 to 750 μm, and more preferably 50 to 450 μm. F1 within the above range is preferable because the bonding strength between the metal molded body 10 and the resin molded body 20 in the composite molded body 1 is increased.
The depth (length) F2 from the flat surface 11 to the pore bottom 13 shown in FIG. 2B is preferably 25 to 1250 μm, and more preferably 60 to 1250 μm. F2 within the above range is preferable because the bonding strength between the metal molded body 10 and the resin molded body 20 in the composite molded body 1 is increased.
A numerical value obtained from F <b> 2-F <b> 1 is the depth of the recess plane 11 a from the plane 11.

Instead of forming a large number of independent pores 12 as shown in FIGS. 2 (b) and 3 (a) in the recess plane 11a, for example, grooves that are continuous in columns or rows in FIG. 3 (a). In addition, both pores and grooves can be formed.
The number of the pores 12 can be set according to the use of the composite molded body, the bonding strength required for the composite molded body, and the like, as shown in FIG. The area occupied by the openings of the pores 12 (occupancy ratio) within the range in which the pores are formed (the range of the quadrangle [recessed plane 11a] surrounded by a1 and a2 in FIG. 3B) is 10 to 95%. Can be.
In FIG. 2B, since the concave plane 11a is formed in the entire rectangular area surrounded by a1 and a2 in FIG. 3B, the concave plane relative to the rectangular area surrounded by a1 and a2. The occupation ratio of 11a is 100%.
The total volume (per 1 mm ² ) of the pores 12 (excluding the volume of the concave flat surface 11a) is preferably in the range of 10 × 10 ⁻³ mm ³ to 600 × 10 ⁻³ mm ³ .

In the next step, a portion including the joining surface (plane 11, recess plane 11 a) of the metal molded body 10 in which the pores 12 are formed is placed in the mold, and a resin that becomes the resin molded body 20 is used. Insert molding to obtain the composite molded body 1.
By this insert molding process, the resin enters the pores 12 of the metal molded body 10 shown in FIG. 1 (or the interior of the concave plane 11a when the concave plane 11a is provided), resulting in the resin intrusion 30. A composite molded body 1 in a state is obtained.

  The composite molded body of FIG. 1 is one in which the pores 12 are formed in the same oblique direction. For this reason, when the resin molding 20 is pulled in the direction of the arrow X1 shown in FIG. 1, the angle α (same as the angle α in FIG. 4) formed between the tensile direction and the central axis direction of the pore 12 becomes an acute angle. Is particularly enhanced.

When the metal molded body used in the composite molded body has a curved surface, laser irradiation is performed as shown in FIGS. 5 (a), (b), and FIG.
The metal molded body 50 shown in FIG. 5A is a round bar, and the surface (circumferential surface) 51 is a bonding surface with the resin.
When the plane 55 in contact with the surface (circumferential surface) 51 is considered, laser irradiation is performed so that the plane 55 is inclined (angle α).

FIG. 5B is an embodiment in which the round bar (metal molded body) 50 having the concave curved surface 51a in FIG. 5A is used, and the surface including the concave curved surface 51a is a surface to be bonded to the resin. It will be.
When the plane 55 in contact with the concave curved surface 51 a is considered, the laser irradiation is performed so that the plane 55 is inclined (angle α).

In FIG. 6, the metal molded body 60 is a plate having a curved surface 61, and the curved surface 61 is a bonding surface with a resin.
When the plane 65 in contact with the curved surface 61 is considered, laser irradiation is performed so that the plane 65 is inclined (angle α).
When the metal molded body 60 has a concave curved surface as shown in FIG. 5B, laser irradiation is performed in the same manner as in FIG.

In the next step, the joint surface (the peripheral surface 51 in FIG. 5A, the peripheral surface 51 in FIG. 5B, the concave curved surface 51a in FIG. 5B), and the peripheral surface in FIG. The portion including 61) is placed in a mold, and insert molding is performed using a resin to be the resin molded body 20, whereby the composite molded body 1 is obtained.
As in the case shown in FIG. 1, the insert molding process causes the resin to enter the pores 12 of the metal molded body 50 (or the inside of the concave curved surface 51a when the concave curved surface 51a is provided) to enter the resin. A composite molded body in which the portion 30 is produced is obtained.

  A composite molded body similar to that shown in FIG. 1 (however, a composite molded body in which curved surfaces are joined) has pores 12 formed in the same oblique direction. Therefore, when the resin molded body 20 is pulled in the direction of the arrow X1 shown in FIG. 1, the angle α (same as the angle α in FIGS. 5 and 6) formed by the tensile direction and the central axis direction of the pore 12 becomes an acute angle. In particular, the bonding strength is increased.

<Method 2 for producing composite molded body>
As shown in FIGS. 7 and 8, the metal molded body 10 used in the composite molded body 1 shown in FIG. 1 is formed in the same oblique direction as shown in FIG. It is possible to have pores 12a and 12b formed in different oblique directions.

The metal molded body 10 having the pores 12a and 12b shown in FIGS. 7 and 8 is formed by laser irradiation so as to be in different oblique directions (angles α1 and α2) with respect to the plane 11.
7 and 8 are examples in which the irradiation direction of the laser (L1) for forming the pores 12a and the irradiation direction of the laser (L2) for forming the pores 12b are opposite to each other by 180 °. The irradiation direction of the laser (L1) and the irradiation direction of the laser (L2) may be different, and the irradiation direction can be appropriately set according to the use of the composite molded body.
The angle α1 and the angle α2 can be the same angle, but can be different angles as long as they are acute angles.
After forming the pores 12a, the pores 12b may be formed, or the pores 12a and 12b may be formed in parallel.

  In the composite molded body 1 of FIG. 1, when the metal molded body 10 having the pores 12a and 12b formed in different oblique directions as shown in FIG. 8 is used, the resin molding 20 is pulled in the direction of the arrow X1. Not only when, but also the bonding strength when the resin molding 20 is pulled in the direction of the arrow X2 in the opposite direction is increased.

<Method for producing composite molded body-3>
The metal molded body 10 used in the composite molded body 1 shown in FIG. 1 replaces the formation of slanted pores 12 as shown in FIGS. 2 and 8 with respect to the plane of the metal molded body. A circular groove 12c as shown in FIGS. 9 and 10 formed by laser irradiation so as to form a circular shape in an oblique direction can be provided.

The metal molded body 10 having the circular groove 12c shown in FIGS. 9 and 10 is formed by laser irradiation so as to be in a different oblique direction (angle α) with respect to the plane 11 and to form a circle. .
Instead of the circular groove 12c, a circle formed by a large number of pores 12c may be used.
A plurality of circular grooves 12 c having the same size or different sizes can be formed with respect to a desired portion of the joint surface (plane) 11.
The circular groove 12c may be a concentric circle formed of a plurality of circles.
Moreover, it can replace with a circular groove | channel and can also be made into grooves, such as a polygon and an ellipse.
9 and 10, as shown in FIG. 2B, a concave plane 11 a including a circular groove 12 c can be formed on the plane 11 of the metal molded body 10.

  In the composite molded body 1 of FIG. 1, when a metal molded body 10 having a circular groove 12c as shown in FIGS. 9 and 10 is used, the bonding strength can be obtained no matter which direction the resin molded 20 is pulled. Is increased.

<Production method of composite molded body-4>
A metal molded body 10 used in the composite molded body 1 shown in FIG. 1 is formed by laser irradiation so as to form a circle in a different oblique direction with respect to the plane of the metal molded body. A circular groove 12c and a circular groove 12d as shown can be combined.

The metal molded body 10 having the circular groove 12c and the circular groove 12d shown in FIGS. 11 and 12 is irradiated with laser (L1, L2) so as to be in different oblique directions (angles α1, α2) with respect to the plane 11. Form.
In FIG. 12, the angle α1 and the angle α2 have a relationship of α1 <α2, but may be the same angle.
11 and 12, the circular groove 12c and the circular groove 12d form a double concentric circle, but three or more concentric circles may be formed. The groove at that time is preferably a groove formed by laser irradiation alternately in the same oblique direction.
In FIGS. 11 and 12, the circular groove 12c and the circular groove 12d are formed so as to form concentric circles, but the circular groove 12c and the circular groove 12d may be formed separately.
In addition, it may replace with the circular groove | channel 12c and the circular groove | channel 12d, and the circular shape may be formed by many pores 12c or 12d.
A plurality of circular grooves 12 c and circular grooves 12 d having the same size or different sizes can be formed with respect to a desired portion of the joint surface (plane) 11.
Moreover, it can replace with a circular groove | channel and can also be made into grooves, such as a polygon and an ellipse.
11 and 12, as shown in FIG. 2 (b), a concave plane 11 a including a circular groove 12 c can be formed on the plane 11 of the metal molded body 10.

  In the composite molded body 1 of FIG. 1, when the metal molded body 10 having the circular grooves 12c and the circular grooves 12d as shown in FIGS. 11 and 12 is used, in which direction the resin molded 20 is pulled. Even so, the bonding strength is increased.

Next, the operation of the composite molded body of the present invention will be described with reference to FIGS.
FIG. 13 is the same as the composite molded body 1 shown in FIG.
A composite molded body 100 in FIG. 14 is obtained by joining a metal molded body 110 and a resin molded body 120, and the metal molded body 110 has pores 112 perpendicular to the plane 111.
The metal molded body 110 and the resin molded body 120 are joined by a resin intrusion portion 130 in which a resin enters the pores 112.

FIGS. 13A and 14A show a state in which the composite molded body 1 has started to be pulled in the direction of the arrow X1.
FIGS. 13B and 14B show a state in which the pulling in the direction of the arrow X1 is continued.
When pulled in the direction of the arrow X1 in FIGS. 13 (a) and 14 (a), the presence of the resin intrusion portions 30 and 130 causes the X1 direction (see FIG. 13 (b) and FIG. 14 (b)). A force in the Y1 direction perpendicular to the plane 11) is generated. The force in the Y1 direction is greater on the end surface 20a of the resin molded body 20 and the end surface 120a side of the resin molded body 120 than on the end surface 20b of the resin molded body 20 and the end surface 120b of the resin molded body 120.

In the composite molded body 1 of FIG. 13, the central axis direction of the resin intrusion portion 30 is oblique with respect to the plane 11, and the resistance against the force in the Y1 direction increases, so the metal molded body 10 and the resin molded body It is prevented that 20 peels off.
On the other hand, in the composite molded body 100 of FIG. 14, the central axis direction of the resin intrusion portion 130 is the same direction as the Y1 direction, and the resistance against the force in the Y1 direction is small, so as shown in FIG. It begins to come off from the resin intrusion portion 130 close to the end face 120a side. At this time, a shear stress acts on the resin intrusion portion 130 remaining in the metal molded body 110.
And as shown in FIG.14 (d), a part of resin penetration part 130 by the side of the end surface 120b remains in the metal molded object 110 side in the state which reached the shear strength of resin and torn, and the resin molded object 120 is It will come off.

  The metal of the metal molded body used in the composite molded body of the present invention is not particularly limited, and can be appropriately selected from known metals according to applications. Examples thereof include those selected from iron, various stainless steels, aluminum or alloys thereof, copper, magnesium and alloys containing them.

  Resin of the resin molded body used in the composite molded body of the present invention includes thermoplastic elastomers in addition to thermoplastic resins and thermosetting resins.

  A thermoplastic resin can be suitably selected from well-known thermoplastic resins according to a use. For example, polyamide-based resins (aliphatic polyamides such as PA6 and PA66, aromatic polyamides), copolymers containing styrene units such as polystyrene, ABS resin, AS resin, polyethylene, copolymers containing ethylene units, polypropylene, propylene Examples thereof include copolymers containing units, other polyolefins, polyvinyl chloride, polyvinylidene chloride, polycarbonate resins, acrylic resins, methacrylic resins, polyester resins, polyacetal resins, and polyphenylene sulfide resins.

  A thermosetting resin can be suitably selected from well-known thermosetting resins according to a use. For example, urea resin, melamine resin, phenol resin, resorcinol resin, epoxy resin, polyurethane, and vinyl urethane can be mentioned.

  A thermoplastic elastomer can be suitably selected from well-known thermoplastic elastomers according to a use. Examples thereof include styrene elastomers, vinyl chloride elastomers, olefin elastomers, urethane elastomers, polyester elastomers, nitrile elastomers, and polyamide elastomers.

These thermoplastic resins, thermosetting resins, and thermoplastic elastomers can be blended with known fibrous fillers.
Examples of known fibrous fillers include carbon fibers, inorganic fibers, metal fibers, and organic fibers.
Carbon fibers are well known, and PAN, pitch, rayon, lignin and the like can be used.
Examples of inorganic fibers include glass fibers, basalt fibers, silica fibers, silica / alumina fibers, zirconia fibers, boron nitride fibers, and silicon nitride fibers.
Examples of the metal fiber include fibers made of stainless steel, aluminum, copper and the like.
Examples of organic fibers include polyamide fibers (fully aromatic polyamide fibers, semi-aromatic polyamide fibers in which one of diamine and dicarboxylic acid is an aromatic compound, aliphatic polyamide fibers), polyvinyl alcohol fibers, acrylic fibers, polyolefin fibers, Synthetic fibers such as polyoxymethylene fibers, polytetrafluoroethylene fibers, polyester fibers (including wholly aromatic polyester fibers), polyphenylene sulfide fibers, polyimide fibers, liquid crystal polyester fibers, natural fibers (cellulosic fibers, etc.) and regenerated cellulose ( Rayon) fiber or the like can be used.

As these fibrous fillers, those having a fiber diameter in the range of 3 to 60 μm can be used. Among these, for example, the width of the marking pattern formed on the joint surface 11 of the metal molded body 10 ( It is preferable to use a fiber having a smaller fiber diameter than the size of the opening of the pore 12 or the width of the groove. The fiber diameter is more desirably 5 to 30 μm, and further desirably 7 to 20 μm.
When a fibrous filler having a fiber diameter smaller than the width of the marking pattern is used, a composite molded body in which a part of the fibrous filler is stuck in the marking pattern of the metal molded body is obtained. This is preferable because the bonding strength between the molded body and the resin molded body can be increased.
As for the compounding quantity of the fibrous filler with respect to 100 mass parts of a thermoplastic resin, a thermosetting resin, and a thermoplastic elastomer, 5-250 mass parts is preferable. More preferably, it is 25-200 mass parts, More preferably, it is 45-150 mass parts.

  In the method for producing the composite molded body of the present invention, a known laser can be used. For example, YVO4 laser, YAG laser, semiconductor laser, glass laser, ruby laser, He-Ne laser, nitrogen laser, chelate laser, dye laser Can be used.

  Laser irradiation conditions, such as wavelength, beam diameter, pore spacing, frequency, etc., depend on the size, mass, type, and required bonding strength of the metal molded body and resin molded body to be bonded. It can be determined as appropriate.

Example 1, Comparative Examples 1 and 2
Example 1 irradiates a metal formed body (aluminum: A5052) with laser at an angle α = 60 ° in FIG. 4 to form oblique pores (see Table 1) as shown in FIG. did.
In Comparative Examples 1 and 2, laser irradiation was performed from the vertical direction (angle α = 90 °) to the surface of the metal molded body (aluminum: A5052) to form vertical pores (see Table 1).
The metal molded body (aluminum: A5052) has a width of 15 mm × length of 60 mm and a thickness of 1 mm, and the laser irradiation range (the square range of the solid line in FIG. 3B) is a1 = 10 mm, a2 = 4 mm, a3 = 1 mm and a4 = 2.5 mm.
The laser irradiation conditions are as follows.

<Laser irradiation conditions>
Laser: YV04
Output: 5.5W
Wavelength: 1064mm
Beam diameter: 30 μm
Scan speed: 500mm / sec
Frequency: 50kHz

After forming pores in the metal molded body, insert molding is performed by the following method to obtain a composite molded body shown in Example 1 (FIG. 13 (a)) and Comparative Examples 1 and 2 (FIG. 14 (a)). It was.
<Insert molding (injection molding)>
Resin: GF60% reinforced PA66 resin (Plastotron PA66-GF60-01 (L9): manufactured by Daicel Polymer Co., Ltd.)
Resin temperature: 320 ° C
Mold temperature: 100 ° C
Injection molding machine: FUNAC ROBOSHOT S-2000i-100B

[Tensile test]
Using the composite molded bodies 3 of Example 1 and Comparative Examples 1 and 2, a tensile test was performed to evaluate the bonding strength. The results are shown in Table 1.
In the tensile test, the maximum load when the metal molded body and the resin molded body were pulled in the X1 direction until the metal molded body and the resin molded body were broken was measured with the metal molded body side fixed.
<Tensile test conditions>
Testing machine: Tensilon UCT-1T
Tensile speed: 5mm / min
Distance between chucks: 50mm

[Bending test]
Using the composite molded bodies 3 of Example 1 and Comparative Examples 1 and 2, a bending test was performed to evaluate the bonding strength. The results are shown in Table 1.
The bending test is the maximum when the composite molded body 3 is placed on the support base 200 and pressed with the indenter 201 from the metal molded body side as indicated by the arrows in FIG. 16 until the metal molded body and the resin molded body break. The load was measured.
<Bending test conditions>
Distance between fulcrums: w = 64mm in FIG.
Test speed: 2mm / min
Indenter radius (R1): 5 mm
Radius of support base (R2): 5mm

DESCRIPTION OF SYMBOLS 1 Composite molded object 10 Metal molded object 11 Plane 12 Pore 20 Resin molded object

Claims (7)

A method for producing a composite molded body in which a metal molded body and a resin molded body are joined,
In the composite molded body, the metal molded body and the resin molded body are joined in a state where a resin enters at least one of the oblique pores and grooves of the metal molded body. Yes,
Laser irradiation from an oblique direction in which the angle α between the laser irradiation plane and the laser irradiation direction of the joint surface of the metal molded body is 15 to 85 °, or a plane in contact with the curved surface irradiated with the laser and the laser A step of forming at least one of a pore and a groove by laser irradiation from an oblique direction in which an angle α formed with the irradiation direction of 15 to 85 ° is formed;
A composite molding comprising a step of placing a portion including a joint surface of a metal molded body in which at least one of the pores and grooves is formed in a mold and molding the resin insert to be the resin molded body. Body manufacturing method. The joint surface of the metal molded body has a concave surface and a surface excluding the concave surface,
The concave surface serving as the joint surface is a flat surface or a curved surface,
The method for producing a composite molded body according to claim 1, wherein at least one of the pores and the grooves is formed in the concave surface. The step of drilling with laser irradiation comprises:
Laser irradiation from an oblique direction in which the angle α between the laser irradiation plane and the laser irradiation direction of the joint surface of the metal molded body is 15 to 85 °, or a plane in contact with the curved surface irradiated with the laser and the laser A first step of forming at least one of pores and grooves by laser irradiation from an oblique direction in which an angle α formed with the irradiation direction of 15 to 85 ° is formed;
The composite according to claim 1, further comprising one or more steps of forming at least one of pores and grooves by laser irradiation so as to be in a range of the same angle α in an oblique direction different from the first step. Manufacturing method of a molded object. A method for producing a composite molded body in which a metal molded body and a resin molded body are joined,
The composite molded body is joined in a state in which resin enters at least one of the oblique pores and grooves of the metal molded body,
Laser irradiation from an oblique direction in which the angle α between the laser irradiation plane and the laser irradiation direction of the joint surface of the metal molded body is 15 to 85 °, or a plane in contact with the curved surface irradiated with the laser and the laser A step of forming a circular groove by laser irradiation from an oblique direction in which an angle α with the irradiation direction of 15 to 85 ° is formed;
A method for producing a composite molded body, comprising a step of placing a portion including a joint surface of a metal molded body in which the circular groove is formed in a mold and molding a resin insert to be the resin molded body. The joint surface of the metal molded body has a concave surface and a surface excluding the concave surface,
The concave surface serving as the joint surface is a flat surface or a curved surface,
The manufacturing method of the composite molded object of Claim 4 whose said circular groove | channel is formed in the said recessed part surface. The step of forming a circular groove by laser irradiation,
Laser irradiation from an oblique direction in which the angle α between the laser irradiation plane and the laser irradiation direction of the joint surface of the metal molded body is 15 to 85 °, or a plane in contact with the curved surface irradiated with the laser and the laser A first step of forming a circular groove by laser irradiation from an oblique direction in which an angle α formed with the irradiation direction of 15 to 85 ° is formed;
Furthermore, 1 or 2 or more processes of forming a circular groove | channel by laser irradiation so that it may become the range of the same angle (alpha) in the diagonal direction different from a 1st process are manufactured of the composite molded object of Claim 4 or 5 Method. The step of forming a circular groove by laser irradiation,
Laser irradiation from an oblique direction in which the angle α between the laser irradiation plane and the laser irradiation direction of the joint surface of the metal molded body is 15 to 85 °, or a plane in contact with the curved surface irradiated with the laser and the laser A first step of forming a circular groove by laser irradiation from an oblique direction in which an angle α formed with the irradiation direction of 15 to 85 ° is formed;
Furthermore, it includes one or more steps of forming a circular groove by laser irradiation so as to be in the same angle α range in an oblique direction different from the first step,
The manufacturing method of the composite molded object of Claim 4 or 5 which forms the groove | channel which makes a some concentric circle.

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