JP5588261B2 - Tire manufacturing method and tire - Google Patents

Description

  The present invention relates to a tire manufacturing method and a tire.

Conventionally, pneumatic tires made of rubber, organic fiber materials, steel members, and the like are used in vehicles such as passenger cars.
In recent years, from the viewpoint of weight reduction, ease of molding, and ease of recycling, it is required to use a resin material, particularly a thermoplastic material such as a thermoplastic resin or a thermoplastic elastomer, as a tire material.
For example, Patent Document 1 discloses a pneumatic tire formed using a thermoplastic polymer material.

Japanese Patent Laid-Open No. 03-143701

  In the pneumatic tire disclosed in Patent Document 1, a reinforcing layer is disposed on the outer peripheral surface of an annular tire frame member formed using a thermoplastic polymer material, and a tread rubber is disposed on the reinforcing layer. Yes.

  Here, as a method of disposing the reinforcing layer on the outer peripheral portion of the tire frame member, a method of winding a coated cord member configured by covering the reinforcing cord with a resin material in the circumferential direction of the tire frame member can be considered.

  However, in such a method, a step (unevenness) in the tire radial direction occurs between the outer peripheral surface of the tire frame member and the outer peripheral surface of the coated cord member. As a result, when the roughening process such as buffing necessary for bonding the tire constituent rubber member such as PCT (Pre-Cured Tread) in the subsequent process is performed on the outer peripheral surface of the tire frame member, ) Remains the treated powder. For this reason, the adhesive force of a tire constituent rubber member falls.

  The present invention has been made to solve the above-described problem, and a tire manufacturing method in which a reinforcing cord member can be disposed so as not to be uneven with respect to an outer peripheral surface of a tire frame member formed using a resin material. And to provide a tire.

The method of manufacturing a tire according to claim 1, the recess formed in the portion corresponding to the crown portion of the tire frame members definitive an arcuate inner circumferential surface of the mold to form an annular tire frame members along the tire circumferential direction along the tire circumferential direction arranging the reinforcing cord member to the reinforcing cord member disposing step and, tire frame members defining an interior put the resin material annular tire frame members of the mold in which the reinforcing cord member is disposed A manufacturing step and a step of disposing a tread outside the crown portion where the reinforcing cord member is disposed .

According to the manufacturing method of a tire according to claim 1, in the reinforcing cord member arranged step, the portion corresponding to the crown portion of the tire frame members definitive on the inner peripheral surface arcuate mold for forming an annular tire frame members A reinforcing cord member is disposed along the tire circumferential direction in a recess formed along the tire circumferential direction. Next, in the tire frame member manufacturing process, an annular tire frame member is formed by putting a resin material into the mold in which the reinforcing cord member is disposed. Next, the tread is disposed outside the crown portion where the reinforcing cord member is disposed. For this reason, the outer peripheral surface of the tire skeleton member and the outer peripheral surface of the coated cord member are wound around the outer peripheral surface of the molded tire skeleton member around the outer peripheral surface of the tire skeleton member, as in the case of wrapping a coated cord member formed by covering a reinforcing cord with a resin material No step in the tire radial direction occurs. As a result, the reinforcing cord member can be disposed so as not to be uneven with respect to the outer peripheral surface of the annular tire frame member formed using the resin material.

  The tire manufacturing method according to claim 2 is the tire manufacturing method according to claim 1, wherein the reinforcing cord member is a belt member in which reinforcing cords adjacent in the tire width direction are integrated with a resin material.

  According to the tire manufacturing method of claim 2, since the reinforcing cord member is a belt member in which the reinforcing cord adjacent in the tire width direction is integrated with a resin material, the molding cord for forming the annular tire frame member The reinforcing cord member can be easily disposed inside, and the manufacture becomes easy.

  The tire manufacturing method according to claim 3 is the tire manufacturing method according to claim 1, wherein the reinforcing cord member is a reinforcing cord disposed adjacent to the tire width direction.

  According to the tire manufacturing method of claim 3, since the reinforcing cord member is a reinforcing cord disposed adjacent to the tire width direction, it is not necessary to cover the reinforcing cord with a resin material in the previous step, and the number of manufacturing steps Can be reduced.

Tire according to claim 4, the reinforcing cord member is disposed in a recess formed in the corresponding sites along the tire circumferential direction in the crown portion of the tire frame members definitive an arcuate inner circumferential surface along the tire circumferential die An annular tire frame member formed by putting a resin material inside the mold is provided , and a tread is disposed outside the crown portion where the reinforcing cord member is disposed .

According to the tire of claim 4, the reinforcing cord member is disposed in a recess formed in the corresponding sites along the tire circumferential direction in the crown portion of the tire frame members definitive an arcuate inner circumferential surface along the tire circumferential direction Since the tread is disposed outside the crown portion where the reinforcing cord member is disposed , the outer peripheral surface of the tire frame member is provided. There is no step in the tire radial direction between the outer peripheral surface of the coated cord member. As a result, the reinforcing cord member can be disposed so as not to be uneven with respect to the outer peripheral surface of the tire frame member formed using the resin material.

  The tire according to claim 5 is the tire according to claim 4, wherein the reinforcing cord member is a belt member in which reinforcing cords adjacent in the tire width direction are integrated with a resin material.

  According to the tire of claim 5, since the reinforcing cord member is a belt member in which the reinforcing cord adjacent in the tire width direction is integrated with a resin material, the inside of the mold that forms the annular tire frame member The reinforcing cord member can be easily disposed, and the manufacture becomes easy.

  A tire according to a sixth aspect is the tire according to the fourth aspect, wherein the reinforcing cord member is a reinforcing cord disposed adjacent to the tire width direction.

  According to the tire of the sixth aspect, since the reinforcing cord member is a reinforcing cord arranged adjacent to the tire width direction, it is not necessary to cover the reinforcing cord with a resin material in the previous step, and the number of manufacturing steps is reduced. be able to.

  As described above, since the tire manufacturing method and the tire according to the present invention have the above-described configuration, the reinforcing cord member is arranged so that the unevenness does not occur on the outer peripheral surface of the tire frame member formed using the resin material. Can be set.

(A) is a cross-sectional perspective view along the tire width direction showing a part of the tire according to the first embodiment of the present invention. FIG. 2B is an enlarged cross-sectional perspective view along the tire width direction of a bead portion in a state where a rim is fitted to the tire according to the first embodiment of the present invention. It is sectional drawing along the tire width direction which shows the circumference | surroundings of the reinforcement layer in the tire of 1st Embodiment in this invention. It is a perspective view which shows the reinforcement cord member of 1st Embodiment in this invention. It is sectional drawing along the tire width direction which shows the state which has arrange | positioned the reinforcement cord member inside the metal mold | die used by 1st Embodiment in this invention. It is sectional drawing along the tire width direction which shows the state which poured the resin material into the inside of the metal mold | die used by 1st Embodiment in this invention. It is a perspective view which shows the molding machine used by 1st Embodiment in this invention. It is a perspective view which shows the extruder for demonstrating the operation | movement which adheres the thermoplastic material for welding to the junction part of a tire frame member half body using the extruder in 1st Embodiment in this invention. It is a perspective view which shows the state which is performing the roughening process on the outer peripheral surface of a tire frame member using the blast apparatus in 1st Embodiment in this invention. It is sectional drawing along the tire width direction which shows the state which has arrange | positioned the reinforcement cord member inside the metal mold | die used by 2nd Embodiment in this invention. It is sectional drawing along the tire width direction which shows the circumference | surroundings of the reinforcement layer of the tire of 2nd Embodiment in this invention. It is a cross-sectional perspective view along the tire width direction which shows the tube type tire as other embodiment in this invention.

[First Embodiment]
Hereinafter, a tire manufacturing method and a first embodiment of a tire according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1A, a tire 10 manufactured by the tire manufacturing method of the present embodiment has a cross-sectional shape substantially the same as a conventional general rubber pneumatic tire. In the following description, the term “width direction” refers to the width direction of the tire frame member 17 and the tire 10, and the term “circumferential direction” refers to the circumferential direction of the tire frame member 17 and the tire 10. Point to.

  As shown in FIGS. 1A and 1B, the tire 10 includes a pair of bead portions 12 that contact a bead seat 21 and a rim flange 22 of a rim 20, and side portions that extend outward from the bead portion 12 in the tire radial direction. 14, an annular tire skeleton member 17 (an example of a tire skeleton member) including a crown portion 16 that connects an outer end in the tire radial direction of one side portion 14 and an outer end in the tire radial direction of the other side portion 14 is provided. Yes.

  Although the tire frame member 17 is formed of a single resin material, the present invention is not limited to this configuration, and for each part of the tire frame member 17 (as in a conventional rubber pneumatic tire) A resin material having different characteristics may be used for the bead portion 12, the side portion 14, the crown portion 16, and the like.

  Further, a reinforcing material (polymer material, metal fiber, cord, non-woven fabric, woven fabric, etc.) is embedded in the tire frame member 17 (for example, the bead portion 12, the side portion 14, the crown portion 16 and the like) and reinforced. The tire frame member 17 may be reinforced with a material.

  As the resin material, a thermosetting resin, a thermoplastic resin, a thermoplastic elastomer (TPE), or the like can be used. The resin material does not include vulcanized rubber.

  Examples of the thermosetting resin include phenol resin, urea resin, melamine resin, epoxy resin, and polyamide resin.

  Examples of the thermoplastic resin include urethane resin, olefin resin, vinyl chloride resin, and polyamide resin.

  Examples of the thermoplastic elastomer include amide-based thermoplastic elastomer (TPA), ester-based thermoplastic elastomer (TPC), olefin-based thermoplastic elastomer (TPO), styrene-based thermoplastic elastomer (TPS) specified in JIS K6418, Examples thereof include urethane-based thermoplastic elastomer (TPU), crosslinked thermoplastic rubber (TPV), and other thermoplastic elastomers (TPZ). Note that it is preferable to use a thermoplastic elastomer in consideration of elasticity required at the time of traveling, moldability at the time of manufacture, and the like.

  Moreover, the same kind of resin material refers to forms, such as ester systems and styrene systems.

  As these resin materials, for example, the deflection temperature under load specified at ISO 75-2 or ASTM D648 (at the time of 0.45 MPa load) is 78 ° C or higher, the tensile yield strength specified by JIS K7113 is 10 MPa or higher, Tensile yield elongation specified in JIS K7113 is 10% or more, Tensile breaking elongation specified in JIS K7113 (JIS K7113) is 50% or more, and Vicat softening temperature (Method A) specified in JIS K7206 is 130 ° C. The above can be used.

  An annular bead core 18 made of a steel cord is embedded in the bead portion 12 of the present embodiment, similar to a conventional general pneumatic tire. However, the present invention is not limited to this configuration, and the bead core 18 may be formed of an organic fiber cord, a resin-coated organic fiber cord, or a hard resin in addition to the steel cord. Further, the bead core 18 may be omitted if the rigidity of the bead portion 12 is ensured and there is no problem in fitting with the rim 20.

  Further, as shown in FIG. 1B, in this embodiment, the resin material that forms the tire frame member 17 in the contact portion of the bead portion 12 with the rim 20 and at least the portion of the rim 20 that contacts the rim flange 22 is used. An annular sealing layer 24 made of a soft material that is also soft is formed. This seal layer 24 may also be formed in a portion that contacts the bead sheet 21.

  As the soft material for forming the seal layer 24, rubber as an example of an elastic body is preferable, and in particular, the same type of rubber as that used on the outer surface of the bead portion of a conventional general rubber pneumatic tire is used. preferable. Note that the sealing layer 24 may be omitted if the sealing property (airtightness) with the rim 20 can be ensured only by the resin material forming the tire frame member 17. Further, as the soft material, another type of resin material softer than the resin material forming the tire frame member 17 may be used.

  As shown in FIG. 2, the crown portion 16 of the tire frame member 17 is laminated with a reinforcing layer 28 composed of a covering cord member 26 as a reinforcing cord member (belt member). The reinforcing layer 28 constitutes the outer peripheral portion of the tire frame member 17 and reinforces the circumferential rigidity of the crown portion 16.

  The covering cord member 26 is formed by covering the reinforcing cord 26A having higher rigidity than the resin material forming the tire frame member 17 with a coating resin material 27 separate from the resin material forming the tire frame member 17. Yes. Further, the covering cord member 26 is bonded to the crown portion 16 at the contact portion with the crown portion 16 (for example, welding or bonding with an adhesive).

  The Young's modulus of the coating resin material 27 is preferably set in the range of 0.1 to 10 times the Young's modulus of the resin material forming the tire frame member 17. This is because when the Young's modulus is 10 times or less, there is no problem in the rim assembling property, but when it exceeds 11 times, the crown portion 16 becomes hard and rim assembling becomes difficult. On the other hand, if the Young's modulus is 0.1 times or less, it is too soft and the in-plane shear rigidity by the reinforcing layer 28 is reduced, resulting in a reduction in cornering force.

  In the present embodiment, the coating resin material 27 is a thermoplastic material (for example, a thermoplastic resin, a thermoplastic elastomer, or the like) among the resin materials.

  The reinforcing cord 26A may be a monofilament (single wire) such as a metal fiber or an organic fiber, or a multifilament (twisted wire) obtained by twisting these fibers.

  In the following, the upper surface (surface on the outer side in the tire radial direction) of the covering cord member 26 is indicated by reference numeral 26U, and the lower surface (surface on the inner side in the tire radial direction) is indicated by reference numeral 26D.

  As shown in FIG. 2, the reinforcing cords 26 </ b> A of the covering cord member 26 are arranged at intervals in the circumferential direction.

  On the outer peripheral surface 17S of the tire skeleton member 17, fine roughened irregularities 96 are uniformly formed, and a cushion rubber 29 is bonded thereon via a bonding agent. In the cushion rubber 29, the radially inner rubber portion flows into the roughened unevenness 96.

  Further, a material having higher wear resistance than the resin material forming the tire frame member 17, for example, a tread 30 made of rubber, is joined to the cushion rubber 29 (outer peripheral surface).

  The rubber used for the tread 30 (tread rubber 30A) is preferably the same type of rubber as that used for conventional rubber pneumatic tires. Instead of the tread 30, a tread formed of another type of resin material that is more excellent in wear resistance than the resin material that forms the tire frame member 17 may be used. Further, the tread 30 is formed with a tread pattern (not shown) including a plurality of grooves on the ground contact surface with the road surface, similarly to the conventional rubber pneumatic tire.

Next, the manufacturing method of the tire of this embodiment is demonstrated.
(Reinforcement cord manufacturing process)
FIG. 3 is a perspective view of the covering cord member 26 of the present embodiment.
As shown in FIG. 3, the covering cord member 26 is a cylindrical belt member formed by covering a plurality of ring-shaped reinforcing cords 26 </ b> A or spiral reinforcing cords 26 </ b> A with a covering resin material 27. . At this time, the reinforcing cord 26A previously coated with the coating resin material 27 may be wound around the outer periphery of the drum-shaped member, and the adjacent coating resin materials 27 may be bonded together by welding or adhesion.

  In the present embodiment, the coated cord member 26 having a width corresponding to the tire skeleton member half body 17A is manufactured, but a wide coated cord member 26 corresponding to the tire skeleton member 17 may be manufactured.

(Reinforcing cord member placement process)
In the present embodiment, a tire frame member half body 17A as shown in FIG. 6 is formed by injection molding, and then the two tire frame member half bodies 17A face each other and are joined at a tire center.

  For the manufacture of the tire frame member half body 17A, a mold 40 as a molding die as shown in FIG. 4 is used. The mold 40 is an outer mold that molds the tire outer surface side so that the tire frame member half body 17A constituting the bead portion 12 (see FIG. 1) to the tire center CL (see FIG. 1) can be molded. It has the type | mold 42 and the inner metal mold | die 44 which shape | molds the tire inner surface side.

  In the reinforcing cord member disposing step, the mold 40 is opened, and the arc-shaped inner peripheral surface of the outer mold 42, that is, the concave portion formed in the portion for molding the outer peripheral portion of the tire frame member half body 17 </ b> A in the outer mold 42. The cylindrical covering cord member 26 shown in FIG.

(Tire frame member manufacturing process)
As shown in FIG. 4, the inner mold 44 is provided with a bead core fixing jig 46 at a preset position. Further, a cavity S (space) in the shape of the tire frame member half body 17A is formed between the outer mold 42 and the inner mold 44.

  The bead core fixing jig 46 has a recess 47 corresponding to the dimension of the bead core 18. When the bead core 18 is placed in the mold 40, a part of the bead core 18 enters the recess 47. The tire is supported from the inside of the tire. As a result, the bead core 18 is in a state where movement in the tire inner direction is restricted and movement in the vertical direction (tire radial direction) is also restricted. In this embodiment, twelve jigs 46 are arranged at equal intervals along the bead core accommodation position.

  The jig 46 is formed of a magnet material, and when the bead core 18 is formed of a magnetic material such as steel, it can be securely fixed by being adhered by a magnetic force.

  The gate (resin injection path) 48 of the mold 40 is formed so that the molten thermoplastic polymer material passes through the outside of the tire of the bead core 18 in a state where the bead core 18 enters the recess 47. The thermoplastic polymer material is, for example, a thermoplastic elastomer (TPE) or a thermoplastic resin.

  The gate 48 is a disc gate opened in a ring shape, and the cavity S is formed so as to communicate with the ring-shaped gate 48 and spread in a hollow disk shape. The gate 48 may be a pin gate, but a disk gate is preferable in this way from the viewpoint of formability.

  The tire inner side portion of the bead core 18 is put into the concave portion 47 of the jig 46 and the mold 40 is closed. Then, as shown in FIG. 5, the thermoplastic material melted from the gate 48 is injected into the mold 40 and injection molded to form the tire frame member half body 17A.

  At the time of the injection, the thermoplastic material is injected from the gate 48 so as to pass between the bead core 18 and the outer mold 42 at the position where the jig 46 is provided. Pressed toward the inside of the tire. Therefore, the moving force received by the bead core 18 can be sufficiently supported by the jig 46. Therefore, it is possible to inject the molten thermoplastic material in a state where the jig 46 for preventing displacement of the bead core 18 is not brought into contact with the bead core 18 from the outside of the tire.

  Thereafter, the tire frame member half body 17 </ b> A is taken out from the mold 40. Thereby, the tire frame member half body 17A shown in FIG. 6 is formed.

(Tire frame formation process)
As shown in FIG. 6, the molding machine 80 includes a horizontally disposed shaft 80A, a geared motor 80B that rotates the shaft 80A, a pedestal 80C that is grounded to support the geared motor 80B, have.

  A tire support portion 82 for supporting the tire frame member 17 formed using a resin material is provided on the end portion side of the shaft 80A. The tire support portion 82 has a cylinder block 82A fixed to the shaft 80A. The cylinder block 82A is provided with a plurality of cylinder rods 82B extending radially outward at equal intervals in the circumferential direction.

  A tire support piece 82D having an arcuate curved surface 82C whose outer surface is set substantially equal to the radius of curvature of the inner surface of the tire frame member 17 is provided at the tip of the cylinder rod 82B. FIG. 6 shows a state where the protruding amount of the cylinder rod 82B is the largest. The cylinder rods 82B can project in the same direction in the same direction in conjunction with each other.

  Therefore, the diameter of the tire support portion 82 of the molding machine 80 is reduced, and two tire skeleton member halves 17A that are opposed to each other are disposed on the outer peripheral side thereof. Further, a cylindrical tire inner surface support ring 83 made of a thin metal plate (for example, a steel plate having a thickness of 0.5 mm) is disposed inside the two tire frame member halves 17A (in order to show the inside in FIG. 6). The one tire frame member half body 17A is removed.

  The outer diameter of the tire inner surface support ring 83 is set to be approximately the same as the inner diameter of the outer peripheral portion of the tire frame member half body 17A, and the outer peripheral surface of the tire inner surface support ring 83 is the outer peripheral portion of the tire frame member half body 17A. It is designed to be in close contact with the inner circumferential surface. Thereby, it is possible to suppress the occurrence of unevenness (opposite shape of the unevenness) of the joint portion (welding thermoplastic material 53) due to the unevenness generated on the outer periphery of the tire support portion 82 due to the gap between the tire support pieces 82D. . Moreover, it can suppress that an unevenness | corrugation generate | occur | produces in arrangement | positioning members (The tire frame member 17, the tread 30, other tire structural members (for example, reinforcement layer etc.)) by the clearance gap between tire support pieces 82D. That is, it is possible to suppress the occurrence of unevenness in a portion corresponding to the gap between the tire support pieces 82 </ b> D of the arrangement member due to a force (tension, pressing force, etc.) applied when arranging the arrangement member. Since the tire inner surface support ring 83 is formed of a thin metal plate, it can be easily inserted into the tire frame member half body 17A by being bent and deformed.

  And the diameter of the tire support part 82 is expanded and the tire inner surface support ring 83 is hold | maintained from the inner side by several tire support piece 82D.

  In the vicinity of the molding machine 80, as shown in FIG. 7, when the tire frame member 17 is divided into a plurality of parts, an extruder for extruding a thermoplastic material for welding used to integrate these divided bodies. 90 is disposed (in this embodiment, the tire frame member 17 is formed by welding and integrating the left and right half tire frame member halves 17A). The extruder 90 has a nozzle 90A that discharges the molten thermoplastic material 53 for welding downward. The outlet portion of the nozzle 90A has a substantially rectangular shape, and discharges a belt-shaped welding thermoplastic material 53 having a substantially rectangular cross-sectional shape.

  Further, in the vicinity of the nozzle 90A, a leveling roller 90B for pressing and leveling the welding thermoplastic material 53 attached to the tire frame member half body 17A of the tire frame member 17 and a leveling roller 90B are provided for the tire frame member. A cylinder device 90 </ b> C that moves in a direction in which it is in contact with and away from 17 is disposed. The cylinder device 90C is supported by the support column 52 of the extruder 90 via a frame (not shown). Further, the extruder 90 is movable in a direction parallel to the shaft 80A of the molding machine 80 along the guide rails 54 disposed on the floor surface.

  Therefore, the extruder 90 is moved, and the nozzle 90A is disposed above the abutting portion of the tire frame member half body 17A. Then, while rotating the tire support portion 82 in the direction of the arrow R, the welded thermoplastic material 53 is pushed out from the nozzle 90A toward the joint portion, and the welded thermoplastic material 53 is adhered along the joint portion. . The adhering thermoplastic material 53 for welding is leveled by the leveling roller 90B disposed on the downstream side, and is welded to the outer peripheral surfaces of both tire frame member halves 17A. The welding thermoplastic material 53 is gradually solidified by natural cooling, and the one tire frame member half body 17A and the other tire frame member half body 17A are welded by the welding thermoplastic material 53, and these members are integrated. Thus, the tire frame member 17 is formed.

(Roughening process)
Next, as shown in FIG. 8, the extruder 90 is retracted, and the blast device 100 is disposed in the vicinity of the tire support portion 82. The blast gun 102 is directed toward the outer peripheral surface 17S of the tire frame member 17, and the projection material 104 is injected at a high speed onto the outer peripheral surface 17S while rotating the tire frame member 17 side (in the direction of arrow R). The ejected projection material 104 collides with the outer peripheral surface 17S, and fine roughening irregularities 96 having an arithmetic average roughness Ra of 0.05 mm or more are formed on the outer peripheral surface 17S (see FIG. 2). Instead of rotating the tire frame member 17 side, the blast gun 102 side may be rotated around the circumferential direction of the tire frame member 17.

  Thus, by forming the fine roughening unevenness 96 on the outer peripheral surface 17S of the tire frame member 17, the outer peripheral surface 17S becomes hydrophilic, and the wettability of the bonding agent described later is improved.

  Further, the roughening range is preferably the same as the range in which cushion rubber 29 described later as the tire constituting rubber member is laminated or wider than the range in which cushion rubber 29 is laminated. As a result, the cushion rubber 29 is laminated in a range in which the entire surface is roughened and the intimacy is improved, so that the bonding strength between the cushion rubber 29 and the tire frame member 17 is ensured.

(Lamination process)
Next, a bonding agent is applied to the outer peripheral surface 17S of the tire frame member 17 subjected to the roughening treatment.
The bonding agent is not particularly limited, such as triazine thiol adhesive, chlorinated rubber adhesive, phenolic resin adhesive, isocyanate adhesive, halogenated rubber adhesive, etc., but cushion rubber 29 is vulcanized. It is preferable to react at a temperature (90 ° C. to 140 ° C.).

  Next, the cushion rubber 29 in an unvulcanized state is wound around the outer peripheral surface 17S to which the bonding agent is applied for one round, and a bonding agent such as a rubber cement composition is applied on the cushion rubber 29, A vulcanized or semi-vulcanized tread rubber 30A is wound for one turn to obtain a raw tire frame member state.

  In addition, vulcanized means the state that has reached the degree of vulcanization required for the final product, and the semi-vulcanized state has a higher degree of vulcanization than the unvulcanized state, but is required for the final product. This means that the degree of vulcanization is not reached.

(Vulcanization process)
Next, the raw tire frame member is accommodated in a vulcanizing can or mold and vulcanized. At this time, the unvulcanized cushion rubber 29 flows into the roughened irregularities 96 formed on the outer peripheral surface 17S of the tire frame member 17 by the roughening treatment. When the vulcanization is completed, the anchor rubber is exerted by the cushion rubber 29 flowing into the roughened irregularities 96, and the bonding strength between the tire frame member 17 and the cushion rubber 29 is improved. That is, the bonding strength between the tire frame member 17 and the tread 30 is improved via the cushion rubber 29.

  And if the sealing layer 24 (refer FIG. 1) which consists of a soft material softer than a resin material is adhere | attached on the bead part 12 of the tire frame member 17 using an adhesive agent etc., the tire 10 will be completed.

  Finally, the diameter of the tire support portion 82 is reduced, the completed tire 10 is removed from the tire support portion 82, the inner tire inner surface support ring 83 is bent and deformed, and is removed from the tire.

(Function)
As described above, in the present embodiment, in the reinforcing cord member disposing step, the mold 40 is opened, and the arc-shaped inner peripheral surface of the outer mold 42, that is, the tire frame member half body 17 </ b> A in the outer mold 42. The covering cord member 26 is disposed in a concave portion 42A formed at a portion where the outer peripheral portion of the outer peripheral portion is molded. Next, in the tire frame member manufacturing process, a resin material is put inside the molding die 40 in which the covering cord member 26 is arranged to form the annular tire frame member half body 17A. For this reason, the tire frame member 17 between the adjacent coated cord members is wound around the outer peripheral surface 17S of the molded tire frame member 17 like a case where a coated cord member formed by covering a reinforcing cord with a resin material is wound. No step (unevenness) in the tire radial direction occurs on the outer peripheral surface 17S and the outer peripheral surface of the coated cord member. That is, no concave portion is generated between adjacent coated cord members. As a result, the covering cord member 26 can be disposed on the outer peripheral surface 17S of the annular tire frame member 17 formed using a resin material so that no unevenness is generated.

  Thereby, the processing powder generated when the outer peripheral surface 17S of the tire frame member 17 is roughened remains in the recesses of the outer peripheral surface 17S of the tire frame member 17, and the bonding strength between the tire frame member 17 and the tread 30 is reduced. Can be prevented. As a result, the bonding strength between the tire frame member 17 and the tread 30 can be ensured.

  Further, in the present embodiment, the reinforcing cord member 26 is a belt member in which the reinforcing cord 26A adjacent in the tire width direction is integrated with the covering resin material 27, so that the reinforcing cord 26A can be easily placed inside the mold 40. It is possible to dispose it in a simple manner.

  In addition, when the tread 30 is vulcanized, the cushion rubber 29 flows into the roughened unevenness 96 formed on the outer peripheral surface 17S of the tire frame member 17 by the roughening process. When the vulcanization is completed, the anchor effect is exerted by the rubber (vulcanized) that has flowed into the roughened unevenness 93, and the bonding strength between the tire frame member 17 and the tread 30 is improved.

[Second Embodiment]
Next, a second embodiment will be described. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 9, in this embodiment, the mold 40 is opened, and the reinforcing cord 26 </ b> A as a reinforcing cord member is directly disposed on the outer mold 42. At this time, the reinforcing cord 26 </ b> A is fitted into the recess 42 </ b> B formed in the outer mold 42.

  A plurality of ring-shaped reinforcing cords 26A may be arranged in the recess 42B at predetermined intervals in the tire width direction (discontinuously in the width direction), or continuous reinforcing cords 26A may be predetermined in the tire width direction. They may be arranged in a spiral shape with an interval of. Further, as a movement preventing means for preventing the reinforcing cord 26A from moving in the tire width direction, a groove, a pin or the like for holding the reinforcing cord 26A may be provided in the recess 42B formed in the outer mold 42.

  Then, the metal mold | die 40 is closed similarly to 1st Embodiment. The molten thermoplastic material from the gate 48 is injected into the mold 40 and injection molded to form the tire frame member half body 17A.

  A cross-sectional view along the tire width direction showing the periphery of the reinforcing layer 28 in the tire 10 of the present embodiment is as shown in FIG.

  Therefore, in the present embodiment, the reinforcing cord 26A can be disposed on the outer peripheral surface 17S of the annular tire frame member 17 formed using a resin material so as not to be uneven. Moreover, it is not necessary to coat the reinforcing cord 26A with the coating resin material 27 in the previous process, and the number of manufacturing processes can be reduced.

(Other embodiments)
In each of the above embodiments, the tire skeleton member half body 17A is joined to form the tire skeleton member 17. However, the present invention is not limited to this configuration, and the tire skeleton member 17 is formed using a mold or the like. You may form integrally.

  The tire 10 of each of the above embodiments is a so-called tubeless tire in which an air chamber is formed between the tire 10 and the rim 20 by attaching the bead portion 12 to the rim 20, but the present invention has this configuration. However, the tire 10 may have a complete tube shape as shown in FIG. The complete tube-shaped tire shown in FIG. 11 is also assembled with a rim in the same manner as the tubeless tire shown in FIG.

  Moreover, in each said embodiment, although the cushion rubber 29 was arrange | positioned between the tire frame member 17 and the tread 30, this invention is not restricted to this, It is good also as a structure which does not arrange | position the cushion rubber 29. FIG.

  The embodiments of the present invention have been described above with reference to the embodiments. However, these embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. It goes without saying that the scope of rights of the present invention is not limited to these embodiments.

10 tire 17 tire frame member (tire frame member)
17S Outer peripheral surface of tire frame member 26 Covered cord member (reinforcing cord member, belt member)
26A Reinforcement cord (reinforcement cord member)
27 Resin Material for Coating 28 Reinforcement Layer 29 Cushion Rubber (Tire Component Rubber Member)
30 tread (tire component rubber member)
96 Roughening unevenness

Claims (6)

Mold arcuate inner definitive peripheral surface the tire frame members reinforcing cord member at a portion corresponding to the crown portion in a recess formed along the tire circumferential direction along the tire circumferential direction of forming the annular tire frame members Reinforcing cord member disposing step for disposing;
A tire skeleton member manufacturing step for forming an annular tire skeleton member by inserting a resin material into the mold in which the reinforcing cord member is disposed;
A step of arranging a tread outside the crown portion where the reinforcing cord member is disposed;
A method for manufacturing a tire comprising:   2. The tire manufacturing method according to claim 1, wherein the reinforcing cord member is a belt member in which reinforcing cords adjacent in the tire width direction are integrated with a resin material.   The tire manufacturing method according to claim 1, wherein the reinforcing cord member is a reinforcing cord disposed adjacent to the tire width direction. A resin material inside the crown portion mold reinforcing cord member in a recess formed along the tire circumferential direction at a site corresponding to along the tire circumferential direction is arranged on the tire frame members definitive an arcuate inner circumferential surface A tire including an annular tire frame member formed therein, and a tread disposed outside the crown portion where the reinforcing cord member is disposed .   The tire according to claim 4, wherein the reinforcing cord member is a belt member in which reinforcing cords adjacent in the tire width direction are integrated with a resin material.   The tire according to claim 4, wherein the reinforcing cord member is a reinforcing cord disposed adjacent to the tire width direction.

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