JP2017061142A - Metal resin joined body, method for manufacturing metal resin joined body, block formed of metal resin joined body, method for manufacturing bock formed of metal resin joined body, and transmission belt having block formed of metal resin joined body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure high adhesiveness between a metal member and a resin coating layer while removing an oxide film of the surface of the metal member.SOLUTION: A block 10 formed of a metal resin joined body has an insert material (metal member) 40 formed from a metal material, and a resin coating layer 50 formed from a resin material covering the insert material 40. A plurality of recessed holes 47 having a thickness deeper than a thickness of an oxide film 46 formed on the surface are provided on the insert material 40. The resin coating layer 50 fills a part of the hole 46, and is laminated on the surface of the insert material 40.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a metal resin joined body, a method for producing a metal resin joined body, a block made of a metal resin joined body, a method for producing a block made of a metal resin joined body, and a transmission belt provided with a block made of a metal resin joined body. About.

  2. Description of the Related Art Belt-type continuously variable transmissions that can improve operability during shifting, improve fuel consumption, and the like are known as transmissions in automobiles, motorcycles, and the like. Of the V belts used in the belt type continuously variable transmission, a rubber low edge V belt is used for relatively low loads. As a belt for high-load transmission that is not durable enough with normal rubber belts, it is configured with a plurality of resin blocks arranged in an endless tension band (center belt) at intervals in the longitudinal direction of the belt. A resin block belt is used. The block is fixed to the tension band by press-fitting the tension band into the fitting groove of the block.

  In Patent Documents 1 to 4, a metal reinforcing material (insert material) is a resin so that both sides can withstand a high lateral pressure from the pulley and withstand wear due to contact with the pulley when wound around the pulley. A power transmission belt having a block formed of a resin material having a structure coated with a coating layer is disclosed. For example, in Patent Document 2, the metal reinforcing material is formed of duralumin, and the resin coating layer is blended with a phenol aralkyl resin and a novolac phenol resin in a weight ratio of 50/50 or more and 80/20 or less, and at least tensile elastic. A power transmission belt including a block formed of a phenol resin of a blend resin in which polyacrylonitrile-based carbon short fibers having a rate of 300 GPa or more are blended is disclosed. Patent Document 3 discloses a block for a transmission belt including a plate-like block body made of an aluminum alloy and a covering member made of a hard resin material covering both end faces in the width direction. Patent Document 4 discloses a metal reinforcing material (aluminum, etc.) and carbon that is provided so as to cover both sides of the metal reinforcing material and form both sides of the pulley contact surface, and in which carbon short fibers are added to the matrix resin. A power transmission belt including a block having a resin coating layer formed of a short fiber reinforced resin is disclosed.

  Here, since the insert material has a role as a reinforcing material, it is formed of a metal material. That is, the insert material is a metal member. The resin coating layer is formed of a resin material. Therefore, the block is formed using a metal resin joined body in which a metal member and a resin coating layer are joined. As the insert material, aluminum is generally used. However, if a titanium or stainless steel material having a higher elastic modulus than aluminum is used as the insert material, the block can withstand a higher thrust (side pressure), so that the transmission capability of the belt can be increased. Therefore, the block is required to have high adhesion between the insert material and the resin coating layer. That is, the block is preferably formed using a metal resin bonded body having high adhesiveness.

Japanese Patent Laid-Open No. 63-34342 JP 2004-239432 A JP 2008-45585 A JP 2011-236994 A

  Here, the metal member often has an oxide film formed on the surface. The oxide film inhibits adhesion. Therefore, when the metal member and the resin coating layer are bonded to form a metal resin bonded body, it is required to perform a process of removing the oxide film formed on the surface of the metal member in order to improve the adhesion. . Since the oxide film formed on the surface of the metal member is easily dissolved in acid, the oxide film is conventionally removed by surface treatment with acid. Moreover, the surface of a metal member may be roughened by the surface treatment with an acid. On the other hand, when the metal member is made of titanium or stainless steel, the surface is treated with a special acid such as a mixed solution of nitric acid and hydrofluoric acid because the oxide film is difficult to dissolve with a general acid such as sulfuric acid or nitric acid. To remove the oxide film. However, when the metal member is made of titanium or stainless steel, the oxide film formed on the surface of the metal member can be removed by surface treatment with a special acid such as a mixed solution of nitric acid and hydrofluoric acid, but the metal member The surface of the surface remains smooth. When the resin coating layer is adhered to the surface of the metal member to form the metal resin bonded body, there is a problem that it is difficult to ensure high adhesion if the surface of the metal member remains smooth.

  Therefore, the present invention provides a metal-resin joined body capable of ensuring high adhesion between the metal member and the resin coating layer while removing the oxide film on the surface of the metal member, a method for producing the metal-resin joined body, and metal-resin joining. It aims at providing the transmission belt provided with the block which consists of a block which consists of a block which consists of a body, the block which consists of a metal resin joined body, and a metal resin joined body.

  In order to solve the above-mentioned problems, a metal resin joined body of the present invention comprises a metal member made of a metal material having a plurality of concave holes deeper on the surface than the thickness of the oxide film formed on the surface, and a part of the metal member. And a resin coating layer made of a resin material filled in the hole and laminated on the surface of the metal member.

  In the method for producing a metal resin joined body of the present invention, a plurality of projecting materials made of a material that is dissolved by a predetermined acid is projected onto the surface of a metal member made of a metal material on which an oxide film is formed. A step of embedding deeper than the thickness of the oxide film formed on the surface; and a plurality of the projecting materials embedded in the surface of the metal member are dissolved using the predetermined acid, and a plurality of holes are formed in the surface of the metal member. Forming a resin part and injecting a resin material onto the surface of the metal member to fill the hole with the resin material and forming a resin coating layer laminated on the surface of the metal member. It is characterized by having.

  A method for producing a block made of a metal resin joined body according to the present invention is a method for producing a block made of a metal resin joined body that is arranged in a plurality at a predetermined pitch along the longitudinal direction of an endless tension band and constitutes a transmission belt. A metal member made of a metal material having a fitting groove into which the tension band is fitted and having an oxide film formed thereon is used as an insert material, and a plurality of materials made of a material that dissolves with a predetermined acid on the surface of the metal member Projecting the projectile material and embedding deeper than the thickness of the oxide film formed on the surface of the metal member, and using the predetermined acid for the plurality of projectile materials embedded in the surface of the metal member Melting and forming a plurality of holes on the surface of the metal member; injecting a resin material onto the surface of the metal member to fill the hole with the resin material; and on the surface of the metal member Laminated Forming a resin coating layer, and having a.

  According to this configuration, the hole is formed deeper than the thickness of the oxide film formed on the surface of the metal member. Moreover, a part of resin coating layer is filled in the hole formed in the surface of the metal member. A resin coating layer is laminated on the surface of the metal member. Therefore, even if an oxide film is formed on the surface of the metal member, the oxide film is removed in the hole, and the metal member and the resin coating layer are directly joined. Therefore, the influence by the oxide film which reduces adhesiveness can be prevented. Furthermore, the adhesion between the metal member and the resin coating layer is improved by the anchor effect by a part of the resin coating layer filled in the hole. From the above, it is possible to ensure high adhesion between the metal member and the resin coating layer while removing the oxide film on the surface of the metal member.

  Furthermore, according to the manufacturing method of the metal resin joined body of the present invention and the manufacturing method of the block made of the metal resin joined body of the present invention, the projection material is made of a material that dissolves in the predetermined acid, so that the predetermined acid is used. A concave hole can be efficiently formed by a simple method of dissolving and removing. More specifically, the depth of the concave hole to be formed can be easily controlled only by adjusting the conditions for projecting the projection material. Furthermore, by projecting and embedding a plurality of projection materials simultaneously on the surface of the metal member, holes can be easily formed on the surface of the metal member, so that work efficiency is good. Moreover, since the projection material is dissolved using a predetermined acid, such as being immersed in an acidic solution, the projection material embedded in the surface of the metal member can be reliably dissolved and removed. In addition, since a plurality of projection materials can be simultaneously dissolved and removed, a plurality of holes can be formed at a time. Furthermore, the dissolution (required time and degree of removal) can be easily controlled simply by adjusting the conditions (concentration, etc.) of the acidic solution. As the predetermined acid, a general acid is used. That is, the projection material is made of a material that is soluble in a general acid. The same applies hereinafter.

  In addition, the metal resin joined body of the present invention includes a metal member made of a metal material having a plurality of concave holes deeper on the surface than the thickness of the oxide film formed on the surface, and a part of the metal member is filled in the hole. And an adhesive layer made of an adhesive layered on the surface of the metal member, and a resin coating layer made of a resin member layered on the surface of the adhesive layer.

  In the method for producing a metal resin joined body of the present invention, a plurality of projecting materials made of a material that is dissolved by a predetermined acid is projected onto the surface of a metal member made of a metal material on which an oxide film is formed. A step of embedding deeper than the thickness of the oxide film formed on the surface; and a plurality of the projecting materials embedded in the surface of the metal member are dissolved using the predetermined acid, and a plurality of holes are formed in the surface of the metal member. Forming an adhesive layer on the surface of the metal member, filling the hole with the adhesive, and forming an adhesive layer laminated on the surface of the metal member; And a step of injecting a resin material onto the surface of the adhesive layer to form a resin coating layer laminated on the surface of the adhesive layer.

  A method for producing a block made of a metal resin joined body according to the present invention is a method for producing a block made of a metal resin joined body that is arranged in a plurality at a predetermined pitch along the longitudinal direction of an endless tension band and constitutes a transmission belt. A metal member made of a metal material having a fitting groove into which the tension band is fitted and having an oxide film formed thereon is used as an insert material, and a plurality of materials made of a material that dissolves with a predetermined acid on the surface of the metal member Projecting the projectile material and embedding deeper than the thickness of the oxide film formed on the surface of the metal member, and using the predetermined acid for the plurality of projectile materials embedded in the surface of the metal member Dissolving, forming a plurality of holes in the surface of the metal member, attaching an adhesive to the surface of the metal member, filling the hole with the adhesive, and forming the surface of the metal member Laminated Forming an adhesive layer, said the surface of the adhesive layer injecting a resin material, and having a step of forming a resin coating layer which is laminated on the surface of the adhesive layer.

  According to this configuration, the hole is formed deeper than the thickness of the oxide film formed on the surface of the metal member. Further, a part of the adhesive layer is filled in the hole formed on the surface of the metal member. An adhesive layer is laminated on the surface of the metal member. A resin coating layer is laminated on the surface of the adhesive layer. Therefore, even if the oxide film is formed on the surface of the metal member, the oxide film is removed in the hole, and the metal member and the adhesive layer are directly joined. Therefore, the influence by the oxide film which reduces adhesiveness can be prevented. Furthermore, the adhesion between the metal member and the adhesive layer is improved by the anchor effect of a part of the adhesive layer filled in the hole. And the adhesiveness of the resin coating layer and metal member which are adhere | attached through an contact bonding layer also improves. From the above, it is possible to ensure high adhesion between the metal member and the resin coating layer while removing the oxide film on the surface of the metal member.

  Furthermore, according to the manufacturing method of the metal resin joined body of the present invention and the manufacturing method of the block made of the metal resin joined body of the present invention, the projection material is made of a material that dissolves in the predetermined acid, so that the predetermined acid is used. A concave hole can be efficiently formed by a simple method of dissolving and removing. More specifically, the depth of the concave hole to be formed can be easily controlled only by adjusting the conditions for projecting the projection material. Furthermore, by projecting and embedding a plurality of projection materials simultaneously on the surface of the metal member, holes can be easily formed on the surface of the metal member, so that work efficiency is good. Moreover, since a projection material is melt | dissolved using predetermined acids, such as being immersed in an acidic solution, the projection material embed | buried under the surface of a metal member can be melt | dissolved reliably, and an oxide film can be removed. Moreover, a some projection material can be melt | dissolved simultaneously, an oxide film can be removed, and a several hole part can be formed at once. Furthermore, the dissolution (required time and degree of removal) can be easily controlled simply by adjusting the conditions (concentration, etc.) of the acidic solution.

  Here, in the metal resin joined body of the present invention, the method for producing a metal resin joined body, and the method for producing a block made of a metal resin joined body, the hole has a maximum diameter of 30 to 200 μm, and a plurality of holes It is preferable that the space | interval of the said hole parts is 5-300 micrometers.

  According to this configuration, the maximum diameter of the holes is 30 to 200 μm, and the interval between the plurality of holes is 5 to 300 μm. When the maximum diameter of the hole is smaller than 30 μm, it is difficult to fill the resin material and it is difficult to obtain the anchor effect. On the other hand, if the maximum diameter of the hole is larger than 200 μm, the diameter with respect to the depth of the hole becomes large, and a sufficient anchor effect cannot be obtained. When the interval between the holes is smaller than 5 μm, a portion where the holes overlap is generated, and the anchor effect is difficult to obtain. On the other hand, when the interval between the holes is larger than 300 μm, the area of the hole with respect to the surface area of the metal member becomes small, and it is difficult to obtain a sufficient anchor effect. Therefore, the anchor effect by a part of the resin coating layer filled in the hole can be secured, and the adhesion between the metal member and the resin coating layer can be secured.

  Here, in the metal resin joined body of the present invention, the method for producing a metal resin joined body, and the method for producing a block made of a metal resin joined body, the hole portion preferably has a corner portion.

  According to this structure, a hole has a corner | angular part. Therefore, the surface area of the hole is increased, and the area in the hole where a part of the resin coating layer filled in the hole can be joined can be efficiently secured. And the anchor effect by a part of resin coating layer with which the hole part was filled is acquired more, and the adhesiveness of a metal member and a resin coating layer improves more.

  Here, the block made of the metal resin joined body of the present invention is a block made of the above-described metal resin joined body of the present invention, and the resin coating layer covers the outer surface of the insert material, which is the metal member, in layers. In addition, the transmission belt includes a fitting groove into which an endless tension band is fitted, and a plurality of belts are arranged at a predetermined pitch along the longitudinal direction of the tension band.

  According to this structure, the block consisting of the metal resin joined body of the present invention has the same effect as the above-described metal resin joined body of the present invention.

  Moreover, the transmission belt provided with the block which consists of a metal resin joined body of this invention is provided with the block which consists of the metal resin joined body of this invention mentioned above.

  According to this configuration, the transmission belt provided with the block made of the metal resin joined body of the present invention can obtain the same effect as the block made of the metal resin joined body of the present invention described above.

  Here, the transmission belt provided with the block which consists of a metal resin joined body of this invention is used for a continuously variable transmission.

  As described in the above description, according to the present invention, a metal-resin bonded body and a metal resin that can improve the high adhesion between the metal member and the resin coating layer while removing the oxide film on the surface of the metal member. The manufacturing method of a joined body, the block which consists of a metal resin joined body, the manufacturing method of the block which consists of a metal resin joined body, and the power transmission belt provided with the block which consists of a metal resin joined body can be provided.

1 is a partially omitted cross-sectional view showing a belt-type continuously variable transmission that employs a transmission belt according to the present embodiment, in which (a) shows the same winding radius around each pulley of the transmission belt, and (b) shows the winding. The case where the radii are different is shown. FIG. 2 is a partially cutaway perspective view showing the transmission belt of FIG. 1. FIG. 3 is a side view of the power transmission belt of FIG. 2 as viewed from the belt width direction. FIG. 3 is a front view of the power transmission belt of FIG. 2 as viewed from the belt longitudinal direction. FIG. 3 is a perspective view of the block shown in FIG. 2. It is a figure which shows the block of FIG. 2, (a) is a top view, (b) is a front view seen from the belt longitudinal direction, (c) is a bottom view, (d) is a side view seen from the belt width direction. is there. It is a figure which shows the block which consists of a metal joining body which concerns on 1st Embodiment, (a) is sectional drawing which follows the VII-VII line of Fig.6 (a), (b) is VI of FIG.6 (a). It is sectional drawing which follows the -VI line, (c) is the elements on larger scale of the broken-line part P of (b). It is a figure which shows the procedure of the process performed in order from (a) to (d) of the manufacturing method of the metal bonded body which concerns on 1st Embodiment, and is sectional drawing of a metal bonded body. (A) is sectional drawing which shows the metal joined body of a comparative example, (b) is sectional drawing which shows the metallic joined body of 1st Embodiment, (c) is sectional drawing which shows the metallic joined body of a comparative example It is. It is a figure which shows the block which consists of metal joining bodies which concern on 2nd Embodiment, (a) is sectional drawing which follows the VII-VII line of Fig.6 (a), (b) is VI of FIG.6 (a). It is sectional drawing which follows the -VI line, (c) is the elements on larger scale of the broken-line part P2 of (b). It is a figure which shows the procedure of the process performed in order from (a) to (e) of the manufacturing method of the metal bonded body which concerns on 2nd Embodiment, and is sectional drawing of a metal bonded body. It is a figure which shows the test piece used for the present Example, (a) is a front view, (b) is a top view.

  Next, embodiments of the present invention will be described with reference to the drawings.

[Configuration of belt type continuously variable transmission]
First, a belt type continuously variable transmission 30 that employs the transmission belt 1 according to the present embodiment will be described with reference to FIG. As shown in FIG. 1, the belt-type continuously variable transmission 30 has a structure in which an endless transmission belt 1 is wound around a drive pulley 31 and a driven pulley 32. Then, the transmission belt 1 is rotated between two axes while the side surface of the transmission belt 1 is in contact with the V grooves of the pulleys 31 and 32, and the speed ratio is continuously changed.

  Each pulley 31 and 32 includes fixed pulley pieces 31a and 32a fixed in the axial direction and movable pulley pieces 31b and 32b movable in the axial direction. By moving the movable pulley pieces 31b and 32b in the axial direction, the width of the V groove of the pulleys 31 and 32 formed by the fixed pulley pieces 31a and 32a and the movable pulley pieces 31b and 32b can be continuously changed. It has become. The transmission belt 1 is formed with tapered surfaces whose both end faces in the belt width direction are inclined with the V groove facing surfaces of the pulleys 31 and 32, and according to the changed V groove width, Fit into position. For example, when the state shown in FIG. 1A is changed to a state where the width of the V groove of the driving pulley 31 is narrowed and the width of the V groove of the driven pulley 32 is widened as shown in FIG. The belt 1 moves in the V groove toward the outer diameter side on the drive pulley 31 side, and moves in the V groove toward the inner diameter side on the driven pulley 32 side. As a result, the wrapping radii around the pulleys 31 and 32 are continuously changed, and the gear ratio is continuously changed.

[Configuration of transmission belt]
Next, the configuration of the transmission belt 1 according to the present embodiment will be described with further reference to FIGS. In the following description, when the transmission belt 1 is wound around the pulleys 31 and 32, the direction on the outer peripheral side in the belt thickness direction is “upward”, and the direction on the inner peripheral side in the belt thickness direction is “downward”. May be called.

  As shown in FIG. 2, the transmission belt 1 has a plurality of plate-like blocks 10 arranged along the longitudinal direction of two parallel endless tension bands 2 (belt longitudinal direction shown in FIG. 2). is there. The blocks 10 are arranged so that the upper surface 10a is on the outer peripheral side in the belt thickness direction and the lower surface 10b is on the inner peripheral side in the belt thickness direction. Further, the block 10 is arranged so that the side surface 10c faces the side surface 10c of the adjacent block 10. Each block 10 has the same shape as each other, and the two beam portions (upper beam portion 11 and lower beam portion 12) arranged in the upper and lower directions in the belt thickness direction are center pillars in the central portion in the belt width direction. The portions 13 are connected to form a substantially “H” shape (see FIGS. 5 and 6B). The upper beam portion 11, the lower beam portion 12, and the center pillar portion 13 are integrally formed. The block 10 has a fitting groove 14. The fitting groove 14 is formed to be surrounded by the upper and lower beam portions 11 and 12 and the center pillar portion 13. A pair of fitting grooves 14 are provided on both sides of the central portion in the belt width direction. Each tension band 2 is press-fitted into each fitting groove 14 of each block 10 from both sides in the belt width direction, and each block 10 is integrated with the two tension bands 2.

  As shown in FIG. 4 and FIG. 6B, the length of the block 10 in the belt width direction is shorter as the upper end in the belt thickness direction is the longest and goes to the lower end. When the transmission belt 1 is wound around the pulleys 31 and 32, the upper beam portion 11 of each block 10 is positioned on the outer peripheral side in the belt thickness direction with respect to the tension band 2, and the lower beam portion 12 is positioned on the tension band 2. It is located on the inner peripheral side in the belt thickness direction.

  As shown in FIG. 2, on the outer peripheral surface 2a and the inner peripheral surface 2b of each tension band 2, concave grooves 21a and 21b extending in the belt width direction are provided at a predetermined pitch in the belt longitudinal direction. Further, on the opposing surface in the vertical direction of the fitting groove 14 in each block 10, ridges 15a and 15b extending in the belt width direction are provided. By engaging the ridges 15a and 15b with these concave grooves 21a and 21b, the blocks 10 are fixed at a predetermined pitch along the belt longitudinal direction. As shown in FIG. 3, the concave groove 21b on the inner peripheral surface of the tension band 2 is a concave curved surface having a gentle cross section compared to the concave groove 21a on the outer peripheral surface. The ridge 15b of the fitting groove 14 that engages with the concave groove 21b has a convex curved surface with a gentle cross section as compared with the ridge 15a that engages with the concave groove 21a.

  Further, as shown in FIGS. 6A, 6C, and 6D, the length of each block 10 with respect to the belt longitudinal direction is the belt thickness direction in the upper beam portion 11 located above the belt thickness direction. The lower beam portion 12 positioned below the belt thickness direction is formed so that the thickness gradually decreases toward the lower side below the belt thickness direction.

[Tension band]
As shown in FIG. 2, the tension band 2 includes a rubber layer 5 in which the core wire 4 is embedded in a spiral shape, and a reinforcing cloth 6 that covers the upper and lower surfaces of the rubber layer 5. As the core wire 4, a rope made of polyester fiber, polyamide fiber, aramid fiber, glass fiber, carbon fiber or the like, a steel wire, or the like is used. Instead of the core wire 4, a woven fabric or knitted fabric made of the above-described fibers, a metal thin plate, or the like may be embedded. The rubber layer 5 is made of chloroprene rubber, natural rubber, nitrile rubber, styrene-butadiene rubber, hydrogenated nitrile rubber (including a mixed polymer of hydrogenated nitrile rubber and unsaturated carboxylic acid metal salt), ethylene-α-olefin. A single material such as an elastomer (ethylene-α-olefin rubber such as ethylene-propylene copolymer (EPM), ethylene-propylene-diene terpolymer (EPDM, etc.)) or a rubber obtained by appropriately blending these, or Made of polyurethane rubber.

  The reinforcing cloth 6 is for preventing the rubber layer 5 from being worn by friction with the block 10 during belt running, and is formed of a woven cloth such as plain weave, twill weave or satin weave. As the fiber material, aramid fiber, nylon fiber, polyester fiber or the like is used. In addition, from the viewpoint of preventing wear due to rubbing between the block 10 and the tension band 2, an aramid fiber having excellent wear resistance is preferable, but a nylon fiber having inferior wear resistance as compared to an aramid fiber can also be used. Further, since the nylon fiber has better stretchability than the aramid fiber, it can be made to accurately follow the shape of the fitting groove 14 of the block 10.

[Block made of metal resin bonded body according to first embodiment]
Here, the configuration of the block 10 according to the first embodiment will be described in more detail with further reference to FIG. The block 10 includes an insert material 40, a resin coating layer 50, and an adhesive layer 60. The insert material 40 is covered with a resin coating layer 50 via an adhesive layer 60. Here, the block 10 is made of a metal-resin joined body, the insert material 40 is a metal member, and the resin coating layer 50 is a resin member.

  For example, the block 10 has a length in the belt thickness direction of 10 to 17 mm, a length in the belt width direction of 20 to 30 mm, and a length in the belt longitudinal direction of 2 to 5 mm. The angle, that is, the belt angle is, for example, 24 to 30 °.

  As shown in FIG. 7A, the insert member 40 is formed by connecting the upper beam portion 41 and the lower beam portion 42 by a center pillar portion 43 at the center portion in the belt width direction, as in the case of the block 10. "". The upper beam portion 41, the lower beam portion 42, and the center pillar portion 43 are integrally formed. The length of the insert material 40 in the belt width direction is such that the end portion on the outer peripheral side is the longest and goes to the end portion on the inner peripheral side. Moreover, as shown in FIG.7 (b), the length regarding the belt longitudinal direction of the insert material 40 is substantially the same as the edge part of an outer peripheral side, and the edge part of an inner peripheral side.

  The insert material 40 is made of a metal material made of titanium or stainless steel having excellent heat resistance and high strength and high elastic modulus. In particular, as titanium, 64 titanium alloy (Ti-6Al-4V) and 15-3-3-3 titanium alloy are preferable. Moreover, as a stainless material, SUS304, SUS316, SUS430, SUS440, and MX7 are preferable.

  For example, the length of the upper beam portion 41 in the belt thickness direction of the insert material 40 is 3.5 to 7.0 mm, the length of the center pillar portion 43 in the belt thickness direction is 3.5 to 7.0 mm, and the lower side. The length of the beam portion 42 in the belt thickness direction is 3.5 to 7.0 mm.

  As shown in FIG. 7C, since the insert material 40 is made of a metal material, an oxide film 46 is formed on the surface of the insert material 40. The thickness of the oxide film 46 is, for example, 0.5 to 5 μm. A plurality of concave holes 47 deeper than the thickness of the oxide film 46 are formed on the surface of the insert material 40. The concave hole 47 is filled with an adhesive constituting an adhesive layer 60 described later. The shape of the hole 47 is not particularly limited, and may be a circle or a corner as shown in FIG.

  The hole 47 preferably has a maximum diameter of 30 to 200 μm. If the maximum diameter of the hole 47 is smaller than 30 μm, the adhesive constituting the adhesive layer 60 is difficult to be filled, and the anchor effect is difficult to obtain. On the other hand, if the maximum diameter of the hole 47 is larger than 200 μm, the diameter with respect to the depth of the hole 47 becomes large, and a sufficient anchor effect cannot be obtained. Moreover, it is preferable that the space | interval of the some hole parts 47 is 5-300 micrometers. When the interval between the plurality of hole portions 47 is smaller than 5 μm, a portion where the hole portions 47 overlap is generated, and the anchor effect is difficult to obtain. On the other hand, when the interval between the hole portions 47 is larger than 300 μm, the area of the hole portion 47 with respect to the surface area of the insert material 40 becomes small, and it is difficult to obtain a sufficient anchor effect.

  The adhesive layer 60 is made of an adhesive, and is formed by partially filling the hole 47 of the insert material 40 and covering the outer surface of the insert material 40 in layers. As the adhesive, a silane coupling agent (for example, an epoxy silane coupling agent or an amino silane coupling agent), isocyanate, a phenol resin, an epoxy resin, or the like is used.

  The layer thickness of the adhesive layer 60 is, for example, 0.5 to 5 μm.

  7A and 7B, the portions covering the both end surfaces of the upper beam portion 41 and the lower beam portion 42 of the insert material 40 in the belt width direction of the resin coating layer 50 are pulleys 31 and 32 (see FIG. 7). 1).

  The resin coating layer 50 covers the outer surface of the insert material 40 in a layered manner via the adhesive layer 60. The resin coating layer 50 is formed of a resin material. The resin coating layer 50 is preferably formed of a hard resin material. The hard resin material is, for example, a resin composition in which short carbon fibers are added to a matrix resin. The matrix resin may be a thermosetting resin or a thermoplastic resin. It does not specifically limit as a thermosetting resin, For example, a phenol resin (for example, novolak-type phenol resin), an epoxy resin, etc. are mentioned. The thermoplastic resin is not particularly limited, and examples thereof include polyamide resin, polyimide resin, and polycarbonate resin. The matrix resin may be composed only of a thermosetting resin, may be composed only of a thermoplastic resin, and is a blend of a thermosetting resin and a thermoplastic resin. Also good. The matrix resin may additionally contain a rubber component or the like.

  The carbon fibers contained in the resin coating layer 50 preferably have an average fiber length of 100 μm or more, and more preferably 150 μm or more. The average fiber length of the carbon fibers is obtained by measuring the fiber lengths of 20 arbitrary carbon fibers based on the image analysis of the surface observation photograph of the resin coating layer 50, and obtaining the average value obtained by repeating this twice. It is done.

  The matrix resin forming the resin coating layer 50 may include para-aramid fibers, graphite powder, and the like in addition to carbon fibers. Para-type aramid fiber is a short fiber, for example, fiber length is 1 mm-3 mm, and the addition amount with respect to 100 mass parts of matrix resins is 2-5 mass parts. The graphite powder has, for example, a particle size of 5 μm to 10 μm and an addition amount of 15 to 20 parts by mass with respect to 100 parts by mass of the matrix resin.

  The layer thickness of the resin coating layer 50 is, for example, 0.8 to 1.5 mm.

[Manufacturing Method of Block Consisting of Metal-Resin Bonded Body According to First Embodiment]
Here, the manufacturing method of the block 10 which consists of a metal resin joined body of 1st Embodiment is demonstrated in detail, referring FIG.8 and FIG.9. The block 10 made of the metal resin bonded body of the first embodiment is manufactured by the steps shown in FIGS.

  In the step shown in FIG. 8A, an insert material (metal member) 40 made of titanium or stainless steel and having an oxide film 46 formed on the surface is prepared.

  In the step shown in FIG. 8B, a plurality of shot materials (projection materials) 48 are projected onto the surface of the insert material 40 to be embedded deeper than the depth of the oxide film 46 formed on the surface of the insert material 40. (Shot peening process) Specifically, the shot material 48 is embedded by performing shot peening of the fine shot material 48 on the surface of the insert material 40. Here, the size of the shot material 48 is preferably 30 to 200 μm. Further, the shape of the shot material 48 is not particularly limited, but preferably has corner portions. This is because the corners of the shot material 48 are likely to pierce the surface of the insert material 40. The shot material 48 preferably has a large specific gravity and hardness, and is made of a material that dissolves in a predetermined acid. Here, the predetermined acid is a commonly used acid such as sulfuric acid or nitric acid. The shot material 48 is, for example, iron powder that is easily dissolved in commonly used acids. In shot peening, the projection pressure is preferably 0.2 to 0.6 MPa, and the moving speed of the stage on which the insert material (metal member) 40 is placed is preferably 10 to 20 mm / s.

  In the step shown in FIG. 8C, the shot material 48 embedded in the surface of the insert material 40 is dissolved using a predetermined acid (acid treatment). As long as the shot material 48 can be dissolved, there are no particular restrictions on the type, concentration, and dissolution method of the predetermined acid. Specifically, the shot material 48 is preferably dissolved by impregnating the insert material 40 in an acidic solution using a predetermined acid. This is because it is easy to form a plurality of holes at a time. For example, the shot material 48 is dissolved by immersing the insert material 40 in which the shot material 48 is embedded on the surface in a 25 wt% sulfuric acid aqueous solution at 60 ° C. for 10 minutes. By dissolving the shot material 48 embedded in the surface of the insert material 40, a plurality of holes 47 deeper than the depth of the oxide film 46 are formed on the surface of the insert material 40.

  In the step shown in FIG. 8D, the adhesive layer 60 is formed by attaching an adhesive to the surface of the insert material 40 having the hole 47 formed on the surface. A part of the adhesive layer 60 is filled into a plurality of holes 47 formed on the surface of the insert material 40. Specifically, the adhesive layer 60 is formed by immersing the insert material 40 having a plurality of holes 47 formed on the surface thereof in an adhesive solution made of a silane coupling agent or the like. The adhesive layer 60 may be formed by applying an adhesive.

  8E, the resin coating layer 50 is formed by covering the surface of the adhesive layer 60. In the step shown in FIG. Specifically, the resin coating layer 50 is formed by injection molding a resin material on the insert material 40 having the adhesive layer 60 laminated on the surface. Here, the resin material is, for example, a phenol resin composition. The block 10 which consists of a metal resin joined body is manufactured according to the above process.

  In addition, the block 10 which consists of a metal resin joined body formed when the moving speed of the stage on which the insert material 40 is placed is changed in the shot peening of the process shown in FIG. 8B will be described based on FIG. To do. FIG. 9A shows a block 10 made of a metal-resin bonded body formed when shot peening is performed at a stage moving speed slower than 10 mm / s. FIG. 9B shows a block 10 made of a metal-resin joined body formed when shot peening is performed at a stage moving speed of 10 to 20 mm / s. FIG. 9C shows a block 10 made of a metal-resin bonded body formed when shot peening is performed with the stage moving speed faster than 20 mm / s. As shown in FIG. 9 (a), when the moving speed of the stage is slower than 10 mm / s, the hole 47 is formed close to the surface of the insert material 40, so that a portion where the hole 47 overlaps is generated. It is difficult to obtain an anchor effect on the surface of the material 40. On the other hand, as shown in FIG. 9C, when the stage moving speed is faster than 20 mm / s, the hole 47 is formed away from the surface of the insert material 40. And the anchor effect is difficult to obtain on the surface of the insert material 40. Therefore, in order to obtain a sufficient anchor effect on the surface of the insert member 40, it is preferable to perform shot peening with the stage moving speed of 10 to 20 mm / s as shown in FIG. 9B. In addition, in FIG.9 (b), it is preferable that the space | interval of the some hole parts 47 is 5-300 micrometers specifically.

  As described above, the metal resin joined body according to the first embodiment, the method for producing the metal resin joined body, the block 10 made of the metal resin joined body, the method for producing the block 10 made of the metal resin joined body, and the metal resin joined In the transmission belt 1 having the body block 10, the hole 47 is formed deeper than the thickness of the oxide film 46 formed on the surface of the insert material (metal member) 40. Further, a part of the adhesive layer 60 is filled in the hole 47 formed on the surface of the insert material 40. The adhesive layer 60 is laminated on the surface of the insert material 40. Moreover, the resin coating layer 50 is laminated on the surface of the adhesive layer. Therefore, even if the oxide film 46 is formed on the surface of the insert material 40, the oxide film 46 is removed in the hole 47, and the insert material 40 and the adhesive layer 60 are directly joined. Therefore, the influence by the oxide film 46 which reduces adhesiveness can be prevented. Furthermore, the adhesion between the insert material 40 and the adhesive layer 60 is improved by the anchor effect of a part of the adhesive layer 60 filled in the hole 47. And the adhesiveness of the resin coating layer 50 adhere | attached through the contact bonding layer 60 and the insert material 40 also improves. From the above, it is possible to ensure high adhesion between the insert material 40 and the resin coating layer 50 while removing the oxide film 46 on the surface of the insert material 40.

  Moreover, according to the manufacturing method of the metal resin joined body and the manufacturing method of the block made of the metal resin joined body according to the first embodiment, the shot material (projection material) 48 is made of a material that dissolves in a predetermined acid, thereby The concave hole 47 can be efficiently formed by a simple method of dissolving and removing the acid using the acid. More specifically, the depth of the concave hole 47 to be formed can be easily controlled only by adjusting the conditions for projecting the shot material 48. Further, since a plurality of shot materials 48 are simultaneously projected and embedded on the surface of the insert material (metal member) 40, the hole portion 47 can be easily formed on the surface of the insert material 40. Efficiency is good. Further, since the shot material 48 is dissolved using a predetermined acid such as being immersed in an acidic solution, the shot material 48 embedded in the surface of the insert material 40 can be surely dissolved and the oxide film 46 can be removed. . Further, the plurality of shot materials 48 can be simultaneously dissolved to remove the oxide film 46, and the plurality of holes 47 can be formed at a time. Furthermore, the dissolution (required time and degree of removal) can be easily controlled simply by adjusting the conditions (concentration, etc.) of the acidic solution.

[Block made of metal resin bonded body according to second embodiment]
Here, the configuration of the block 10 according to the second embodiment will be described in more detail with reference to FIG. As shown in FIGS. 10A and 10B, the block 10 includes an insert material 40 and a resin coating layer 50. The insert material 40 is covered with a resin coating layer 50. Here, the block 10 is made of a metal-resin joined body, the insert material 40 is a metal member, and the resin coating layer 50 is a resin member. The block 10 according to the second embodiment is the same as the block 10 according to the first embodiment shown in FIG. 7 except that the adhesive layer 60 is not provided, and the same members are denoted by the same reference numerals. The description is omitted.

  As shown in FIG. 10C, the surface of the insert material 40 is formed by coating a resin coating layer 50 in layers. Part of the resin coating layer 50 is filled in a concave hole 47 provided on the surface of the insert material 40.

[Method for Producing Block Consisting of Metal-Resin Bonded Body According to Second Embodiment]
Here, the manufacturing method of the block 10 which consists of a metal resin joined body of 2nd Embodiment is demonstrated in detail, referring FIG. The block 10 made of the metal resin joined body of the second embodiment is manufactured by the steps shown in FIGS. In addition, in the manufacturing method of the block 10 which concerns on 2nd Embodiment, the process shown to Fig.11 (a)-(c) is FIG.8 (a)-(c) in the manufacturing method of the block 10 which concerns on 1st Embodiment. Are the same as those shown in FIG.

  As shown in FIG. 11D, the resin coating layer 50 is formed by coating the surface of the insert material 40 with the hole 47 formed on the surface thereof with a resin material. A part of the resin coating layer 50 is filled in a plurality of holes 47 formed on the surface of the insert material 40. And the outer surface of the insert material 40 is coat | covered in layers. Specifically, the resin coating layer 50 is formed by injection molding a resin material on the insert material 40 having a plurality of holes 47 formed on the surface thereof. Here, the resin material is, for example, a phenol resin composition. The block 10 which consists of a metal resin joined body is manufactured according to the above process.

  As described above, the metal resin joined body according to the second embodiment, the method for producing the metal resin joined body, the block 10 made of the metal resin joined body, the method for producing the block 10 made of the metal resin joined body, and the metal resin joined In the transmission belt 1 having the body block 10, the hole 47 is formed deeper than the thickness of the oxide film 46 formed on the surface of the insert material (metal member) 40. Further, a part of the resin coating layer 50 is filled in the hole 47 formed on the surface of the insert material 40. Further, the resin coating layer 50 is laminated on the surface of the insert material 40. Therefore, even if the oxide film 46 is formed on the surface of the insert material 40, the insert material 40 and the resin coating layer 50 are directly joined in the hole 47. Therefore, the influence by the oxide film 46 which reduces adhesiveness can be prevented. Furthermore, the adhesion between the insert material 40 and the resin coating layer 50 is improved by the anchor effect of a part of the resin coating layer 50 filled in the hole 47. From the above, it is possible to ensure high adhesion between the insert material 40 and the resin coating layer 50 while removing the oxide film 46 on the surface of the insert material 40.

  Moreover, according to the manufacturing method of the metal resin joined body and the manufacturing method of the block made of the metal resin joined body according to the second embodiment, the shot material (projection material) 48 is made of a material that dissolves in a predetermined acid. The concave hole 47 can be efficiently formed by a simple method of dissolving and removing the acid using the acid. More specifically, the depth of the concave hole 47 to be formed can be easily controlled only by adjusting the conditions for projecting the shot material 48. Further, since a plurality of shot materials 48 are simultaneously projected and embedded on the surface of the insert material (metal member) 40, the hole portion 47 can be easily formed on the surface of the insert material 40. Efficiency is good. Further, since the shot material 48 is dissolved using a predetermined acid such as being immersed in an acidic solution, the shot material 48 embedded in the surface of the insert material 40 can be surely dissolved and the oxide film 46 can be removed. . Further, the plurality of shot materials 48 can be simultaneously dissolved to remove the oxide film 46, and the plurality of holes 47 can be formed at a time. Furthermore, the dissolution (required time and degree of removal) can be easily controlled simply by adjusting the conditions (concentration, etc.) of the acidic solution.

[Shear test of specimen]
As described above, in order to evaluate the adhesiveness between the insert material (metal member) 40 and the resin coating layer 50 in the block 10 composed of the metal-resin joined body of the present embodiment, a shear force test was performed using a test piece. .

  As illustrated in FIGS. 12A and 12B, the test piece 70 is formed by bonding a part of the resin piece 71 and a part of the metal piece 72. As the resin piece 71, the resin composition which reinforced phenol resin with the carbon fiber of the short fiber was used. The dimension of the resin piece 71 is 48 mm long × 15 mm wide × 5.5 mm thick. The resin piece 71 is processed so that the thickness of the 12.5 mm portion from the end of the resin piece 71 is 4.0 mm in the length direction. The metal piece 72 is made of titanium alloy (Ti-6Al-4V) or stainless steel (SUS304). The size of the metal piece 72 is 48 mm long × 15 mm wide × 1.5 mm thick. In the test piece 70, the metal piece 72 is overlapped in the thickness direction at a portion where the thickness of the resin piece 71 is 4.0 mm. The resin piece 71 and the metal piece 72 are bonded via an adhesive layer (not shown). In addition, the test piece 70, the resin piece 71, and the metal piece 72 have modeled the block 10, the resin layer 50, and the insert material (metal member) 40, respectively.

  In this example, test pieces 70 of Examples 1 to 4 and Comparative Examples 1 to 2 were produced.

  In Examples 1 and 2, using a titanium alloy (Ti-6Al-4V) for the metal piece 72, as a pretreatment, the surface (one side) of the metal piece 72 is shot peened under the shot conditions shown in Table 1, A shot material was embedded in the surface of the metal piece 72 (shot peening process). Steel beads (iron powder) were used as the shot material. In Examples 1 and 2, the size of the shot material was varied (Example 1 was 50 μm, Example 2 was 100 μm).

  Next, as a pretreatment, it was immersed in an acid solution shown in Table 2 for 10 minutes at 60 ° C. to dissolve the buried shot material (acid treatment). In this way, a hole was formed on the surface of the metal piece 72.

  Further, as an adhesion treatment, the metal piece 72 is immersed in the silane coupling agent solution shown in Table 3 for 10 minutes and then dried at 100 ° C. for 10 minutes to form an adhesive layer made of the silane coupling agent on the surface of the metal piece 72. did. As the silane coupling agent, an epoxy silane coupling agent (“A-187” manufactured by Momentive Performance Materials) was used.

  The metal piece 72 subjected to the above pretreatment and adhesion treatment is injected using a resin composition in which the above-mentioned phenol resin is reinforced with short carbon fibers so as to cover the metal piece 72 in a range of 15 mm × 12.5 mm. Molding was performed to produce a resin piece 71. And it annealed at 180 degreeC for 6 hours, and produced the test piece 70 to which the metal piece 72 and the resin piece 71 were adhere | attached.

  In Example 3, a test piece 70 was produced in the same manner as in Example 1 except that the metal piece 72 was made of stainless steel (SUS304). In Example 4, a test piece 70 was produced in the same manner as in Example 2 except that the metal piece 72 was made of stainless steel (SUS304).

  In Comparative Example 1, the metal piece 72 was placed in the treatment liquid shown in Table 4 at 50 ° C. by the conventional oxide film removing method without performing the pretreatment performed in Examples 1 and 2 on the metal piece 72. A test piece 70 was produced in the same manner as in Example 1 except that the pretreatment was performed for 5 minutes.

  In Comparative Example 2, the pretreatment performed in Examples 3 and 4 was carried out by impregnating the metal pieces 72 into the treatment solution shown in Table 4 for 5 minutes at 50 ° C. by the conventional oxide film removing method. The test piece 70 was produced by the same method as Example 3 except having performed.

  The test pieces 70 of Examples 1 to 4 and Comparative Examples 1 and 2 manufactured as described above were subjected to a test speed of “5 mm / min” and an ambient temperature of “room temperature” using an autograph AG-X 5 kN. Pulling in the direction of the arrow shown in FIGS. 12A and 12B, the shear force of the test piece 70 was measured. The measurement was performed 3 times, and the average value was calculated. Table 5 shows the measured shear force.

  From the result of Table 5, the shear force of the test piece 70 of Examples 1-4 is about twice as high as the shear force of the test piece 70 of Comparative Examples 1 and 2, and the adhesiveness of the resin piece 71 and the metal piece 72 is excellent. I found out.

  Specifically, when comparing the test piece 70 of Examples 1 and 2 with the test piece 70 of Examples 3 and 4, the size of the shot material is different from 50 μm and 100 μm, but the shear force is not so much. There is no difference. Therefore, it can be seen that in the present embodiment, the size of the shot material is preferably about 30 to 200 μm.

  Further, comparing the test piece 70 of Examples 1 and 3 with the test piece 70 of Examples 2 and 4, the metal piece 72 is different from titanium alloy and stainless steel, but the shearing force is not much different. I can't. Therefore, in this embodiment, it can be seen that the adhesiveness between the metal piece 72 and the resin piece 71 can be secured for a plurality of types of metal materials used as the metal piece 72.

  Moreover, when the test piece 70 of Examples 1 and 3 and the test piece 70 of Comparative Examples 1 and 2 are compared, respectively, the shear force of the test piece 70 of Examples 1 and 3 is the test piece of Comparative Examples 1 and 2. It is about twice the shearing force of 70. Therefore, since the hole portion is provided on the surface of the metal piece 72 by performing shot peening and acid treatment as pretreatment, the metal piece 72 and the resin piece 71 are formed by the resin anchor effect of the resin piece 71 filled in the hole portion. It can be seen that sufficient adhesion is secured. Further, the test pieces of Comparative Examples 1 and 2 were not pretreated by shot peening and acid treatment, but only pretreated by the method of removing the oxide film with nitric acid and hydrofluoric acid treatment liquid. It can be seen that the surface remains smooth and sufficient adhesion between the metal piece 72 and the resin piece 71 is not ensured.

  From the above, a plurality of concave holes deeper than the thickness of the oxide film formed on the surface of the metal piece 72 are provided on the surface, and the resin piece 71 is formed in the hole formed partly on the metal piece 72. By filling and laminating on the surface of the metal piece 72, the resin piece 71 is removed by the anchor effect of the resin piece 71 filled in the hole of the metal piece 72 while removing the oxide film on the surface of the metal piece 72. It can be seen that the high adhesiveness of the metal piece 72 can be secured.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various design changes can be made as long as they are described in the claims. It is.

  For example, in the above-described embodiment, the block 10 provided in the transmission belt as the metal resin bonded body is described, but the metal resin bonded body is not limited to the block 10. Any metal-resin bonded body composed of a metal member made of a metal material and a resin coating layer made of a resin material coated on the metal member may be used for other purposes.

  In the present embodiment, the metal material used as the insert material 40 is titanium or stainless steel, but is not limited thereto. The metal material used as the insert material 40 may be aluminum or other metal materials.

  Utilizing the present invention, a metal resin joined body capable of ensuring high adhesion between a metal member and a resin coating layer while removing an oxide film on the surface of the metal member, a method for producing the metal resin joined body, and a metal resin A block made of a joined body, a method for producing a block made of a metal resin joined body, and a transmission belt provided with a block made of a metal resin joined body can be provided.

DESCRIPTION OF SYMBOLS 1 Transmission belt 2 Tensile belt 10 Block 14 Fitting groove 40 Insert material (metal member)
46 Oxide film 47 Hole 48 Shot material (projection material)
50 Resin coating layer 60 Adhesive layer

Claims (15)

A metal member made of a metal material in which a plurality of concave holes deeper than the thickness of the oxide film formed on the surface are provided on the surface;
A metal resin joined body comprising: a resin coating layer made of a resin material partially filled in the hole and laminated on the surface of the metal member. A metal member made of a metal material in which a plurality of concave holes deeper than the thickness of the oxide film formed on the surface are provided on the surface;
An adhesive layer made of an adhesive partly filled in the hole and laminated on the surface of the metal member;
And a resin coating layer made of a resin member laminated on the surface of the adhesive layer.   3. The metal resin bonded body according to claim 1, wherein a maximum diameter of the hole is 30 to 200 μm, and a distance between the plurality of holes is 5 to 300 μm.   The metal resin joined body according to any one of claims 1 to 3, wherein the hole portion has a corner portion. A plurality of projection materials made of a material that dissolves with a predetermined acid are projected onto the surface of a metal member made of a metal material on which an oxide film is formed, and buried deeper than the thickness of the oxide film formed on the surface of the metal member A process of
Dissolving the plurality of projection materials embedded in the surface of the metal member using the predetermined acid to form a plurality of holes in the surface of the metal member;
Injecting a resin material onto the surface of the metal member, filling the hole with the resin material, and forming a resin coating layer laminated on the surface of the metal member;
A method for producing a metal-resin joined body, comprising: A plurality of projection materials made of a material that dissolves with a predetermined acid are projected onto the surface of a metal member made of a metal material on which an oxide film is formed, and buried deeper than the thickness of the oxide film formed on the surface of the metal member A process of
Dissolving the plurality of projection materials embedded in the surface of the metal member using the predetermined acid to form a plurality of holes in the surface of the metal member;
Attaching an adhesive to the surface of the metal member, filling the hole with the adhesive, and forming an adhesive layer laminated on the surface of the metal member;
Injecting a resin material onto the surface of the adhesive layer to form a resin coating layer laminated on the surface of the adhesive layer;
A method for producing a metal-resin joined body, comprising:   The maximum diameter of the hole portion is 30 to 200 µm, and the interval between the plurality of hole portions is 5 to 300 µm, The metal resin joined body according to claim 5 or 6, Production method.   The said projection material has a corner | angular part, The manufacturing method of the metal resin joined body as described in any one of Claims 5-7 characterized by the above-mentioned. A block comprising the metal-resin joined body according to any one of claims 1 to 4,
The resin coating layer covers the outer surface of the insert material which is the metal member in a layered manner,
Having a fitting groove into which the endless tension band is fitted,
A block comprising a metal-resin joined body, wherein a plurality of belts are arranged at a predetermined pitch along the longitudinal direction of the tension band to constitute a transmission belt. A method of manufacturing a block made of a metal-resin joined body that is arranged in a plurality at a predetermined pitch along the longitudinal direction of an endless tension band and constitutes a transmission belt,
A metal member made of a metal material having a fitting groove into which the tension band is fitted and having an oxide film formed thereon is used as an insert material, and a plurality of materials made of a material that dissolves with a predetermined acid on the surface of the metal member Projecting the projecting material, and embedding deeper than the thickness of the oxide film formed on the surface of the metal member;
Dissolving the plurality of projection materials embedded in the surface of the metal member using the predetermined acid to form a plurality of holes in the surface of the metal member;
Injecting a resin material onto the surface of the metal member, filling the hole with the resin material, and forming a resin coating layer laminated on the surface of the metal member;
The manufacturing method of the block which consists of a metal resin joined body characterized by having. A method of manufacturing a block made of a metal-resin joined body that is arranged in a plurality at a predetermined pitch along the longitudinal direction of an endless tension band and constitutes a transmission belt,
A metal member made of a metal material having a fitting groove into which the tension band is fitted and having an oxide film formed thereon is used as an insert material, and a plurality of materials made of a material that dissolves with a predetermined acid on the surface of the metal member Projecting the projecting material, and embedding deeper than the thickness of the oxide film formed on the surface of the metal member;
Dissolving the plurality of projection materials embedded in the surface of the metal member using the predetermined acid to form a plurality of holes in the surface of the metal member;
Attaching an adhesive to the surface of the metal member, filling the hole with the adhesive, and forming an adhesive layer laminated on the surface of the metal member;
Injecting a resin material onto the surface of the adhesive layer to form a resin coating layer laminated on the surface of the adhesive layer;
The manufacturing method of the block which consists of a metal resin joined body characterized by having.   12. The metal resin bonded body according to claim 10, wherein the hole has a maximum diameter of 30 to 200 μm, and an interval between the plurality of holes is 5 to 300 μm. The manufacturing method of the block which becomes.   The said projection material has a corner | angular part, The manufacturing method of the block which consists of a metal resin joined body as described in any one of Claims 10-12 characterized by the above-mentioned.   A power transmission belt comprising a block made of a metal resin joined body, comprising a block made of the metal resin joined body according to claim 9.   The power transmission belt provided with a block made of a metal-resin joined body according to claim 14, wherein the power transmission belt is used in a continuously variable transmission.

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