JP2013199834A - Joint structure for metal member and synthetic resin member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint structure for a metal member and a synthetic resin member with bonding strength and sealing performance improved by the use of a sealer member for automobile parts.SOLUTION: A joint structure for a metal member 4 and a synthetic resin member 10 of automobile parts includes a synthetic resin material 13 including aluminum powder for a contact surface 11 of the synthetic resin member 10 contacting with the metal member 4. A sealer member 12 is applied between the contact surface 11 and the metal member 4 for joining the metal member 4 and the synthetic resin member 10.

Description

  The present invention relates to a joining structure for joining a metal member and a synthetic resin member using a sealer member in an automotive part. For example, the present invention relates to a joining structure used for joining an automobile engine body and a timing chain cover, an oil pan, or a cylinder head cover.

  Conventionally, in an engine of an automobile, it has heat resistance in joining the engine body and the timing chain cover, joining the engine body and the oil pan, joining the engine body and the cylinder head cover, etc. In order to ensure, a sealer member having a predetermined thickness is used between them.

  Conventionally, the timing chain cover, the oil pan, or the cylinder head cover has been formed of metal like the engine body. However, in order to reduce the weight of the vehicle, the use of synthetic resin has been studied. Also, in the joining structure of other metal members and metal members, in order to reduce the weight and cost, one metal member is replaced with a synthetic resin member, and the joining of the metal member and the synthetic resin member is increased. ing.

  As shown in FIG. 6, when the timing chain cover 110 that is a synthetic resin member is attached to the cylinder block 4 that is a metal member, the sealer member 112 has a high adhesive strength to the metal member, but the synthetic resin and In order to bond the metal member and the synthetic resin member with the sealer member 112, it has been desired to improve the bonding strength between the synthetic resin member and the sealer member 112. Moreover, in the engine component for motor vehicles, since the synthetic resin member needs heat resistance, there was a restriction | limiting in the material to be used.

  In order to improve the adhesive force of the synthetic resin member, the surface of the synthetic resin is roughened by shot blasting or sandpaper, and the adhesive force is improved by an anchor effect (for example, see Patent Document 1). .) In this case, the resin member and the resin sheet, i.e., the synthetic resin are bonded to each other, the adhesive layer is applied as a thin layer, and a paste-like sealer member having a predetermined thickness is used. Is different.

  Further, as shown in FIG. 7, when the timing chain cover 210 made of synthetic resin is attached to the cylinder block 4, a metal piece 213 is attached to the contact surface 211 of the timing chain cover 210 with the cylinder block 4, and the metal It is also considered that the piece 213 and the cylinder block 4 which is a metal member are bonded with a sealer member 212.

  However, it is necessary to bond the metal piece 213 to the timing chain cover 210, which is troublesome. In order to strengthen this adhesive force, for example, as shown in FIG. 8, a metal plate 304 is overlaid on a molded body 310 made of synthetic resin, and a laser beam 321 is irradiated from a laser beam source 320. There is also one that joins the molded body 310 and the metal plate 304 (for example, see Patent Document 2). In this case, equipment such as the laser light source 320 is required, and it takes time to irradiate the laser light 321 and the cost also increases.

JP 2010-58485 A JP 2010-76437 A

  Therefore, an object of the present invention is to provide a joining structure that joins a metal member and a synthetic resin member that improve adhesion strength and sealing performance using a sealer member in an automotive part.

The present invention of claim 1 for solving the above-mentioned problems is easy to manufacture, and in a joining structure for joining a metal member and a synthetic resin member of an automobile part,
A synthetic resin material containing aluminum powder is provided on the contact surface of the synthetic resin member that contacts the metal member, a sealer member is applied between the contact surface and the metal member, and the metal member and the synthetic resin member are joined. It is a junction structure.

  In this invention of Claim 1, since the synthetic resin material containing aluminum powder was provided in the contact surface which contact | abuts the metal member of a synthetic resin member, the intensity | strength of the contact surface which contact | abuts the metal member of a synthetic resin member, Adhesive strength increases. The synthetic resin material containing aluminum powder and the synthetic resin member can be bonded firmly by using the same kind of synthetic resin material and the synthetic resin constituting the synthetic resin member.

  The sealer member is applied between the contact surface and the metal member, and the synthetic resin member having the synthetic resin material containing the metal member and the aluminum powder is joined, so that the aluminum powder in the synthetic resin material contacts the sealer member. The adhesive strength between the sealer member and the synthetic resin member can be increased by exposing to the surface.

  The present invention of claim 2 is a joining structure in which the synthetic resin member joins the synthetic resin member and the metal member entirely formed of a synthetic resin material containing aluminum powder.

  In the present invention of claim 2, since the synthetic resin member is entirely formed of a synthetic resin material containing aluminum powder, the synthetic resin material is used for a timing chain cover or the like because its specific gravity increases due to aluminum and its mass increases. In this case, sound insulation is increased and fire resistance and heat resistance are also increased. By injection-molding a synthetic resin material containing aluminum powder, a synthetic resin member such as a timing chain cover can be produced by a single molding, so that the production work is easy.

  According to a third aspect of the present invention, the synthetic resin material containing aluminum powder is a joining structure in which a metal member and a synthetic resin member are joined to the entire contact surface of the synthetic resin member.

  In the present invention of claim 3, since the synthetic resin material containing aluminum powder is embedded in the entire contact surface of the synthetic resin member, the adhesive strength between the contact surface and the sealer member is increased, and the synthetic resin An increase in the overall weight of the member can be prevented. Since the synthetic resin material is embedded only in the contact surface, an increase in the overall weight of the synthetic resin member can be prevented.

  According to the present invention of claim 4, the metal member is an engine crankcase, a cylinder block or a cylinder head, and the synthetic resin member is a timing chain cover, an oil pan or a cylinder head cover. Structure.

  In the present invention of claim 4, the metal member is an engine crankcase, a cylinder block or a cylinder head, and the synthetic resin member is a timing chain cover, an oil pan or a cylinder head cover. Since the timing chain cover, the oil pan, or the cylinder head cover is made of synthetic resin, the engine can be reduced in weight. Since the synthetic resin material containing aluminum powder is provided on the timing chain cover, oil pan or cylinder head cover, the crankcase, cylinder block or cylinder head and timing chain cover, oil pan or cylinder head cover can be firmly bonded with a sealer member. it can.

  The present invention of claim 5 is a joining structure for joining a metal member and a synthetic resin member whose surfaces facing the metal member of the synthetic resin material containing aluminum powder are polished.

  In the present invention of claim 5, since the surface facing the metal member of the synthetic resin material containing aluminum powder is polished, the resin skin layer on the surface facing the metal member of the synthetic resin material can be removed. In addition, the aluminum powder is reliably exposed to the surface of the synthetic resin material, and the adhesive strength between the synthetic resin material and the sealer member can be improved.

  The present invention according to claim 6 is a joining structure in which the aluminum powder is joined to a synthetic resin material containing 10 to 70% by weight of a synthetic resin material containing aluminum powder.

  In this invention of Claim 6, since aluminum powder was contained 10 to 70 weight% with respect to the synthetic resin material containing aluminum powder, the adhesive force of the synthetic resin material containing aluminum powder and a sealer member is strengthened. can do. This is because if the aluminum powder content is less than 10% by weight, sufficient adhesive strength cannot be obtained, and if the aluminum powder content exceeds 70% by weight, the synthetic resin material becomes brittle.

  According to the seventh aspect of the present invention, the metal member is made of aluminum, aluminum alloy, iron or stainless steel, the synthetic resin member is made of engineering plastic, and the sealer member is a silicone rubber-based paste. It is a joining structure which joins a member and a synthetic resin member.

In the present invention of claim 7, the metal member is made of aluminum, aluminum alloy, iron or stainless steel, the synthetic resin member is made of engineering plastic, and the sealer member is a silicone rubber paste. Since the metal member is made of aluminum, aluminum alloy, iron, or stainless steel, the joining force with the sealer member is large, and the rigidity and heat resistance are high. Since the synthetic resin member is made of an engineering plastic, it can be easily molded, and a product excellent in heat resistance, durability, and rigidity can be obtained.
Since the sealer member is a silicone rubber-based paste, a product having high adhesive strength, excellent heat resistance and durability can be obtained, and the weight can be reduced by reducing the weight.

  The sealer member is applied between the contact surface and the metal member, and the synthetic resin member having the synthetic resin material containing the metal member and the aluminum powder is joined, so that the aluminum powder in the synthetic resin material contacts the sealer member. The adhesive strength between the sealer member and the synthetic resin member can be increased by exposing to the surface.

1 is a side view of an automobile engine used in an embodiment of the present invention. It is a top view of the state which embed | buried the synthetic resin material containing aluminum powder in the contact surface with the cylinder block of the timing chain cover used in embodiment of this invention. It is sectional drawing of the state which embed | buried the synthetic resin material containing aluminum powder in the contact surface with the cylinder block of the oil pan used in embodiment of this invention. It is sectional drawing which formed the whole cylinder block of the oil pan used in other embodiment of this invention with the synthetic resin material containing aluminum powder. In embodiment of this invention, it is a graph which shows the adhesive strength of the synthetic resin material containing aluminum powder, and a sealer member. It is sectional drawing which adhere | attaches the conventional synthetic resin member and a metal member with a sealer member. It is sectional drawing which adhere | attaches another conventional synthetic resin member and a metal member with a sealer member. It is a perspective view which adhere | attaches the conventional metal member and a synthetic resin member by laser processing.

In the embodiment of the present invention, using a sealer member, a die cast cylinder head 3, a cylinder block 4, and a crankcase 23 of an automobile engine 1, a synthetic resin timing chain cover 10, a crankcase 23, A connection structure for joining a metal member and a synthetic resin member using a sealer member in an automobile engine component will be described based on FIGS. 1 to 5 by taking the case of connecting an oil pan 20 as an example.
In addition to the above, the connection structure between the metal member and the synthetic resin member using the sealer member of the present invention can be used when joining the metal member and the synthetic resin member in other automotive engine parts. .

  FIG. 1 is a side view of an engine 1 of an automobile. The engine 1 includes a cylinder head cover 2, a cylinder head 3 below the cylinder head cover 2, and a cylinder block 4 and a crankcase 23 integrally assembled thereunder. Yes. Inside the cylinder head 3, an intake cam pulley 7 and an exhaust cam pulley 8 are attached.

The crankcase 23 is provided with a crank pulley 6, and a timing chain 5 is hung on a gear attached to the tips of the intake cam pulley 7 and the exhaust cam pulley 8 and a gear attached to the tip of the crank pulley 6. The crank pulley 6 is connected to a crankshaft 9 to which an engine piston is attached.
The cylinder head cover 2, the cylinder head 3, the cylinder block 4 and the crankcase 23 are formed of iron (cast iron) aluminum, magnesium, stainless steel, or an alloy containing these.

The timing chain cover 10 is attached so as to cover the side surfaces of the cylinder head 3, the cylinder block 4, and the crankcase 23 to which the timing chain 5 is attached.
As shown in FIG. 1 and FIG. 2, the timing chain cover 10 has a contact surface 11 so that the outer peripheral surface contacts the outer peripheral portions of the cylinder head 3, the cylinder block 4, and the crankcase 23. Accordingly, the timing chain 5 can be completely covered and sealed with the timing chain cover 10. As will be described later, a synthetic resin material 13 containing aluminum powder formed in a strip shape is embedded in the contact surface 11, and a sealer 12 as a sealer member is applied.

The timing chain cover 10 is formed of a heat resistant synthetic resin. For this reason, the weight of the engine 1 can be reduced, and deformation or deterioration due to engine heat is less likely.
As the heat-resistant synthetic resin, engineering plastics are used. For example, nylon 66, nylon 6, nylon 11, nylon 12, etc., which are polyamide resins, and polypropylene, polyacetal, polycarbonate, etc. can be used. The synthetic resin may be a homopolymer or two or more types of copolymers.

  Inorganic fillers can also be used in polyamide resins and other synthetic resins. As the inorganic filler, for example, fibrous fillers such as glass fibers and carbon fibers, and powder fillers such as talc, mica, calcium carbonate, and silica can be used. When an inorganic filler is used, heat resistance and rigidity can be improved. When a fibrous filler such as glass fiber or carbon fiber is used, impact resistance and elasticity are improved.

As shown in FIG. 1, the oil pan 20 is attached to the lower surface of the crankcase 23. The oil pan 20 is formed to be recessed so that oil can be stored, and an abutting surface 21 is formed on the outer peripheral portion so as to abut against the lower surface of the crankcase 23. Similar to the timing chain cover 10, a synthetic resin material 13 containing aluminum powder formed in a band shape is embedded in the contact surface 21, and a sealer 22 is applied.
The oil pan 20 can also use the same heat-resistant synthetic resin as described above, and can use an inorganic filler.

The sealers 12 and 22 which are seal members are made of a paste-like high viscosity silicone rubber material. For the sealers 12 and 22, for example, a gasket called FIPG (Formed In Place Gasket) is used.
Since FIPG has a much larger adhesive strength with a metal than that with a synthetic resin, a large adhesive strength is obtained when a synthetic resin material 13 containing aluminum powder, which will be described later, is embedded and bonded to the cylinder block 4. be able to.

The sealers 12 and 22 have viscosity when applied to the timing chain cover 10 and the oil pan 20, and therefore do not drip immediately and can be hardened with elasticity after application. For this reason, it is possible to seal between the timing chain cover 10 and the cylinder block 4 or between the oil pan 20 and the crankcase 23 to prevent oil from leaking to the outside.
For the sealers 12 and 22 as the sealer members, for example, a rubber-based material such as butyl rubber, polyurethane, chloroprene rubber, and nitrile rubber can be used in addition to the silicone rubber-based material.

Next, the synthetic resin material 13 containing aluminum powder embedded in the contact surfaces 11 and 21 of the timing chain cover 10 and the oil pan 20 which are synthetic resin members will be described.
First, a state in which a synthetic resin material 13 containing aluminum powder is embedded in a belt shape on the contact surface 11 of the timing chain cover 10 according to the first embodiment of the present invention will be described with reference to FIG.

  A synthetic resin material 13 containing aluminum powder is embedded in the contact surface 11 of the timing chain cover 10, and the synthetic resin material 13 containing aluminum powder passes from the contact surface 11 of the timing chain cover 10 to the cylinder block 4 or the like. It is exposed at the end face facing the cylinder head 3.

  A sealer 12 as a sealer member is applied to the end face of the synthetic resin material 13 containing the aluminum powder, and the cylinder block 4 and the cylinder head 3 that are metal parts and the timing chain cover 10 are bonded. Therefore, the strength of adhesion between the synthetic resin material 13 containing aluminum powder and the cylinder block 4 or the cylinder head 3 and the timing chain cover 10 can be increased by the sealer 12, and the synthetic resin material 13 containing aluminum powder The cylinder block 4 and the cylinder head 3 can be strongly held.

  In the synthetic resin material 13 containing aluminum powder, the synthetic resin material 13 may be the same or the same type of material as the synthetic resin constituting the timing chain cover 10. In other words, engineering plastics are used as heat-resistant synthetic resins that are less likely to be deformed or deteriorated by engine heat. Etc. can be used. The synthetic resin may be a homopolymer or two or more types of copolymers.

  As the aluminum powder to be mixed into the synthetic resin material 13, an aluminum powder having a particle size of 25 to 150 μm can be used. As the shape of the aluminum powder, a general shape can be used, and for example, a scale-like or spherical shape can be used. If the particle size is less than 25 μm, it takes time to mix the powder into the synthetic resin material 13, and if it exceeds 150 μm, the moldability of the synthetic resin material 13 mixed with the aluminum powder decreases.

  The aluminum powder is preferably contained in an amount of 10 to 70% by weight with respect to the synthetic resin material 13 containing the aluminum powder. By this content, the adhesive force between the synthetic resin material 13 containing aluminum powder and the sealer 12 can be strengthened. If the aluminum powder content is less than 10% by weight, the exposed amount of the aluminum powder is small and sufficient adhesive strength cannot be obtained. If the aluminum powder content exceeds 70% by weight, the synthetic resin material 13 On the other hand, the amount of the aluminum powder is too large, the elasticity of the synthetic resin material 13 is lowered, and the synthetic resin material 13 becomes brittle. Moreover, when the amount of aluminum powder increases, injection molding becomes difficult.

The relationship between the content of aluminum powder in the synthetic resin material 13 containing aluminum powder and the adhesive strength between the sealer 12 is shown in FIG.
When the content of the aluminum powder is 10% by weight, the adhesive strength is about 0.6 MPa, and below this, the adhesive strength is insufficient. In addition, although the content of aluminum powder is measured up to 50% by weight, an adhesive strength of about 1 MPa is sufficient.

At the joint between the timing chain cover 10 and the cylinder block 4, the synthetic resin material 13 containing aluminum powder continues to the contact surface 11 of the timing chain cover 10 all around as shown in FIGS. Buried. The synthetic resin material 13 containing aluminum powder is formed in a flat plate shape and an annular shape, and its end surface is exposed at the contact surface 11 of the timing chain cover 10.
This molding can be performed by ordinary injection molding of a synthetic resin containing aluminum powder.

For this reason, the contact surface 11 of the timing chain cover 10 is reinforced by the synthetic resin material 13 containing aluminum powder over the entire circumference, has high rigidity, and hardly undergoes thermal deformation.
In FIG. 2, the synthetic resin material 13 containing aluminum powder contains aluminum powder that is not continuously embedded in a strip shape on the contact surface 11 of the timing chain cover 10 but is cut into small pieces. The synthetic resin material 13 can also be embedded along the contact surface 11.

  An adhesive can be applied to the portion embedded in the timing chain cover 10 on the surface of the synthetic resin material 13 containing aluminum powder. In this case, since an adhesive layer is formed on the surface of the synthetic resin material 13 containing aluminum powder, the synthetic resin material 13 containing aluminum powder is strongly bonded to the synthetic resin portion of the timing chain cover 10 by the adhesive layer. Bonded and strongly held stably in the timing chain cover 10.

  As a second embodiment of the present invention, as shown in FIG. 4, the entire timing chain cover 10 can be formed of a synthetic resin material 13 containing aluminum powder. Since the contact surface 11 of the timing chain cover 10 can be entirely formed of the synthetic resin material 13 containing aluminum powder, the adhesive strength with the sealer 12 can be improved.

  Further, when the entire timing chain cover 10 is formed of the synthetic resin material 13 containing aluminum powder, the synthetic resin material 13 is increased in mass by aluminum, the weight of the timing chain cover 10 is increased, and the sound insulation performance is increased. As it increases, the fire resistance and heat resistance of the entire timing chain cover 10 also increase. Further, if the entire timing chain cover 10 is formed of the synthetic resin material 13 containing aluminum powder, the contact surface portion can also be formed by one molding.

  In both the first embodiment and the second embodiment, it is preferable to polish the surface of the synthetic resin material 13 containing aluminum powder that faces the sealer 12. Polishing can be performed with a grindstone or the like. When the surface of the synthetic resin material 13 containing aluminum powder facing the sealer 12 is polished, the resin skin layer that may be formed on the surface of the synthetic resin material 13 is removed, and the metal member of the synthetic resin material 13 and The aluminum powder is reliably exposed on the opposing surface, and the adhesive strength between the synthetic resin material 13 and the sealer 12 can be improved.

Similar to the timing chain cover 10, the synthetic resin material 13 containing aluminum powder can be embedded in the surface of the oil pan 20 that contacts the crankcase 23.
Moreover, the whole oil pan 20 can also be formed of the synthetic resin material 13 containing aluminum powder.

Similar to the timing chain cover 10, a synthetic resin material 13 containing aluminum powder can be embedded in the surface of the cylinder head cover 2 that contacts the cylinder head 3.
Further, the entire cylinder head cover 2 can be formed of the synthetic resin material 13 containing aluminum powder.

DESCRIPTION OF SYMBOLS 1 Engine 2 Cylinder head cover 3 Cylinder head 4 Cylinder block 10 Timing chain cover 11 Contact surface 12 Sealer 13 Synthetic resin material 20 Oil pan 23 Crankcase

Claims (7)

In the joining structure that joins metal parts and synthetic resin parts of automotive parts,
A synthetic resin material containing aluminum powder is provided on a contact surface of the synthetic resin member that contacts the metal member, and a sealer member is applied between the corresponding contact surface and the metal member. A joining structure that joins members.   The joining structure for joining the metal member and the synthetic resin member according to claim 1, wherein the synthetic resin member is entirely formed of a synthetic resin material containing the aluminum powder.   The joint structure for joining the metal member and the synthetic resin member according to claim 1, wherein the synthetic resin material containing the aluminum powder is embedded in the entire contact surface of the synthetic resin member.   4. The metal member according to claim 1, wherein the metal member is an engine crankcase, a cylinder block, or a cylinder head, and the synthetic resin member is a timing chain cover, an oil pan, or a cylinder head cover. A joint structure that joins synthetic resin members.   The joint structure for joining the metal member and the synthetic resin member according to any one of claims 1 to 4, wherein a surface of the synthetic resin material containing the aluminum powder facing the metal member is polished.   The joining structure for joining the metal member and the synthetic resin member according to claim 1, wherein the aluminum powder is contained in an amount of 10 to 70 wt% with respect to the synthetic resin material containing the aluminum powder.   7. The metal member is made of aluminum, aluminum alloy, iron or stainless steel, the synthetic resin member is made of engineering plastic, and the sealer member is a silicone rubber-based paste. The joining structure which joins the metal member and synthetic resin member as described in any one.

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