WO2014129427A1 - タイヤ、タイヤ製造装置、及びタイヤの製造方法 - Google Patents
タイヤ、タイヤ製造装置、及びタイヤの製造方法 Download PDFInfo
- Publication number
- WO2014129427A1 WO2014129427A1 PCT/JP2014/053669 JP2014053669W WO2014129427A1 WO 2014129427 A1 WO2014129427 A1 WO 2014129427A1 JP 2014053669 W JP2014053669 W JP 2014053669W WO 2014129427 A1 WO2014129427 A1 WO 2014129427A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tire
- radial direction
- support
- circumferential direction
- support member
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/01—Inflatable pneumatic tyres or inner tubes without substantial cord reinforcement, e.g. cordless tyres, cast tyres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/18—Sectional casings, e.g. comprising replaceable arcuate parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D2030/086—Building the tyre carcass by combining two or more sub-assemblies, e.g. two half-carcasses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10495—Pneumatic tire or inner tube
- Y10T152/10621—Sectional casings
- Y10T152/1063—Circumferential
Definitions
- the present invention relates to a tire at least partially formed of a resin material, the tire manufacturing apparatus, and the tire manufacturing method.
- thermoplastic resin a thermoplastic elastomer or the like
- a semi-annular shape divided in the axial direction of a tire is required.
- a melted separate thermoplastic material is replenished to the joint portions of the tire frame half bodies.
- the pair of tire constituent members are supported from the inside in the tire radial direction by a dedicated jig.
- the strength of the joint portion can be ensured by using a separate thermoplastic material.
- various devices are required to support the tire frame half from the inner side in the tire radial direction.
- the present invention has been made in consideration of the above-described facts, and a tire capable of obtaining a good joint by accurately supporting with a dedicated jig when joining a pair of tire frame halves. It is an object to provide a tire manufacturing apparatus and a tire manufacturing method.
- the tire according to the first aspect of the present invention is made of a resin material, and a pair of tire skeleton halves each having a bead portion, a side portion, and a half-width crown half are abutted at the tips of the crown halves.
- the bonded tire skeleton member and the inner half surface in the tire radial direction of the crown half and the outer side in the tire width direction than the joined portion of the crown halves, and the pair of tire skeleton halves at the time of joining An engaging portion that engages with an outer surface of a support tool that is supported from the inside in the tire radial direction and restricts movement of the support tool in the tire axial direction.
- the half crown portion is a region where the tread is disposed on the outer side in the tire radial direction, and the bead portion is a portion in contact with the rim flange.
- the side part is an area between the crown half and the bead part.
- the tire according to the first aspect has a tire frame member formed by joining a pair of tire frame halves.
- the tire frame half When manufacturing the tire frame member, when the tire frame half is supported from the inside in the tire radial direction, the tire frame half is pressed outward in the tire radial direction by the support in order to prevent displacement with respect to the support. . At this time, the tire frame half may move outward in the tire axial direction with respect to the support.
- the outer half of the tire frame is engaged with the outer surface of the support tool on the inner side surface in the tire radial direction of the crown half part and on the outer side in the tire width direction with respect to the joint part between the crown half parts.
- An engagement portion for restricting relative movement in the tire axial direction is formed.
- the engaging portion here may be any configuration that regulates the movement of the tire frame half body relative to the support in the tire axial direction relative to the outer surface of the support, such as a convex shape, a concave shape, and a step shape. Includes shape.
- the tire according to the second aspect of the present invention is characterized in that the engaging portion has a convex shape protruding from the inner surface in the tire radial direction of the crown half portion.
- the engaging portion can be configured easily. Moreover, compared with the case where a recessed part is formed, a thin part is not formed in a tire frame member, but the intensity
- the tire according to a third aspect of the present invention is characterized in that the engaging portion is formed along a tire circumferential direction.
- the engaging portion along the tire circumferential direction, it is possible to satisfactorily prevent relative movement in the tire axial direction between the tire frame half body and the support along the tire circumferential direction. it can.
- the meaning of “along the tire circumferential direction” includes both the shape along the tire circumferential direction and the arrangement along the tire circumferential direction. Therefore, it may be divided in the tire circumferential direction, or may be arranged in a dot shape in the tire circumferential direction.
- the tire according to a fourth aspect of the present invention is characterized in that the engaging portion is formed over the entire circumference in the tire circumferential direction.
- the tire according to a fifth aspect of the present invention is characterized in that the engaging portion is divided into a plurality of portions in the tire circumferential direction and is irregularly arranged in the tire circumferential direction.
- the irregular arrangement in the tire circumferential direction can suppress the influence on vibration during running.
- a tire manufacturing apparatus includes a plurality of arm portions that are extendable in the tire radial direction and extend outward in the tire radial direction, and a tip portion that is disposed on the outer side in the tire radial direction of the arm portion.
- the tire frame is supported from the inner side in the tire radial direction, divided into a plurality in the tire circumferential direction, and the outer surface is formed into an annular shape along the inner periphery of the tire frame member so as to be in contact with the inner surface of the tire frame half body.
- a tire support member that supports the body from the inner side in the tire radial direction, and an engagement portion that is formed on the outer surface in the tire radial direction of the tire support member and is formed on the outer side in the tire axial direction with respect to a joint portion between the tire skeleton halves. And a support engagement portion to be engaged.
- the tire support member is supported from the inner side in the tire radial direction by a plurality of arms extending outward in the tire radial direction.
- the tire support member is divided into a plurality of portions in the tire circumferential direction, the outer surface is formed into an annular shape along the inner periphery of the tire frame member, and is in contact with the inner surface of the front ear frame member, and a pair of tire frame half bodies are formed. Support from the inside in the tire radial direction. At this time, the support engagement portion formed on the outer surface in the tire radial direction of the tire support member is engaged with the engagement portion of the tire frame half.
- the tire frame half body in order to prevent displacement between the support tool and the tire frame half body, even if a pressing force from the tire support member to the tire radial direction is applied to the tire frame half body, the tire frame half body and the tire support member It is possible to prevent relative movement in the tire axial direction. Accordingly, the tire frame half can be supported at an accurate position by the tire support member, and good bonding can be obtained.
- the arm portion can be contracted inward in the tire radial direction, separated from the tire support member, and the tire support member can be extracted from the tire radial direction inner side of the tire frame member.
- the tire manufacturing apparatus is characterized in that the support engagement portion is a concave shape formed on a tire radial outer surface of the tire support member.
- the engagement portion on the tire side can be made convex by making the support engagement portion concave. Therefore, compared with the case where the convex portion is formed (when the concave portion is formed on the tire frame member side), a thin portion is not formed on the tire frame member, and the strength of the tire can be maintained.
- the tire manufacturing apparatus is characterized in that the support engagement portion is formed along a tire circumferential direction.
- the tire manufacturing apparatus is characterized in that the support engagement portion is formed over the entire circumference in the tire circumferential direction.
- the support engagement portion can be engaged to provide good support.
- a tire manufacturing method is a tire manufacturing method for manufacturing the tire according to any one of the first to fifth aspects with the tire manufacturing apparatus according to the sixth aspect, wherein the engaging portion is The pair of tire skeleton halves are joined together by adding a resin material, and the tip of the arm portion is retracted inward in the tire radial direction to be separated from the tire support member. The tire support member is removed from the inside of the tire frame half.
- the engaging portion of the tire frame half is engaged with and supported by the supporting engaging portion of the tire supporting member. Therefore, the position shift of the tire skeleton half in the tire axial direction with respect to the tire support member is prevented, and the pair of tire skeleton halves can be favorably joined by adding the resin material. Further, when removing the joined tire skeleton member from the tire support member, the tip of the arm portion is retracted inward in the tire radial direction and separated from the tire support member, and the tire support member is extracted from the inner side in the tire radial direction.
- the tire according to the first aspect has the above-described configuration, it is possible to prevent relative movement in the tire axial direction between the tire frame half and the support tool, and the support tool can be positioned accurately.
- the tire frame half can be supported and good bonding can be obtained.
- the engaging portion can be easily configured, and compared with the case where the concave portion is formed, a thin portion of the tire skeleton member is not formed, The strength of the tire can be maintained.
- the tire according to the third aspect is configured as described above, relative movement in the tire axial direction between the tire frame half and the support can be well prevented along the tire circumferential direction.
- the tire of the fifth aspect has the above configuration, it is possible to suppress the influence on vibration during traveling.
- the tire frame half can be supported at an accurate position by the tire support member, and good bonding can be obtained.
- the tire of the seventh aspect is configured as described above, compared with the case where the convex portion is formed (when the concave portion is formed on the tire frame member side), the thin portion of the tire frame member is not formed, The strength of the tire can be maintained.
- the relative movement in the tire axial direction between the tire frame half and the support can be favorably prevented along the tire circumferential direction.
- the tire according to the tenth aspect has the above-described configuration, displacement of the tire skeleton half in the tire axial direction with respect to the tire support member is prevented, and a pair of tire skeleton halves are added together with a resin material. Can be joined.
- FIG. 2 is a half cross-sectional view in the tire radial direction in a state where the tire frame half is supported by a support. It is an expanded sectional view of the joined part of Drawing 6A.
- FIG. 3 is an enlarged half sectional view in the tire radial direction after joining is completed in a state where the tire frame half is supported by a support.
- the tire according to the present embodiment is a pneumatic tire that is used while being filled with air.
- the tire 10 includes a tire frame member 17.
- the tire frame member 17 includes a pair of bead portions 12, a side portion 14 that extends outward from the bead portion 12 in the tire radial direction, and a crown portion 16 that connects the tire radial direction outer ends of each side portion 14. I have.
- the tire frame member 17 is composed of a pair of annular tire frame halves 17A having the same shape in which one bead part 12, one side part 14, and a half-width crown half part 16A are integrally formed.
- the tip 16B of the crown half 16A has a tapered shape on the tire equatorial plane CL side.
- a ridge 32 as an engaging portion is formed on the inner surface of the crown half portion 16A in the tire radial direction.
- the ridge 32 is disposed on the tire equatorial plane CL side with respect to the center of the crown half portion 16A in the tire width direction W and on the outer side in the tire width direction with respect to the tip 16B of the crown half portion 16A.
- the ridges 32 are formed in an annular shape over the entire circumference along the tire circumferential direction. Further, the ridge 32 has a semicircular cross section.
- the ridge 32 is engaged with a recess 48D as a support engagement portion described later.
- the height H1 of the ridges 32 is preferably in the range of 0.3 mm to 5 mm.
- the engagement may be disengaged and the tire frame half body 17A may move in the tire axial direction W with respect to a tire support member 48 described later. This is because it is difficult to fit the body 17 ⁇ / b> A into the tire support member 48.
- the pair of tire skeleton halves 17A are abutted with each other at the tip 16B of the crown half 16A, and joined at the tire equatorial plane CL to form the tire skeleton member 17.
- a thermoplastic material 19 for welding is used for joining at the tire equatorial plane CL.
- each of the pair of bead portions 12 is in close contact with the bead seat portion 21 and the rim flange 22 of the rim 20, and maintains the internal pressure of the air filled in the tire.
- a tread member 30 constituting a tire tread that is a ground contact portion of the tire is disposed on the outer side in the tire radial direction of the crown portion 16.
- the tire frame member 17 is made of a resin material.
- the resin material here does not include vulcanized rubber.
- examples of the resin material include thermoplastic resins (including thermoplastic elastomers), thermosetting resins, and other general-purpose resins, as well as engineering plastics (including super engineering plastics).
- Thermoplastic resin refers to a polymer compound that softens and flows as the temperature rises and becomes relatively hard and strong when cooled.
- the material softens and flows with increasing temperature, and becomes relatively hard and strong when cooled, and a high molecular compound having rubber-like elasticity is a thermoplastic elastomer, and the material increases with increasing temperature. Is softened, fluidized, and becomes a relatively hard and strong state when cooled, and a high molecular compound having no rubber-like elasticity is distinguished as a thermoplastic resin that is not an elastomer.
- Thermoplastic resins include polyolefin-based thermoplastic elastomers (TPO), polystyrene-based thermoplastic elastomers (TPS), polyamide-based thermoplastic elastomers (TPA), polyurethane-based thermoplastic elastomers (TPU), and polyesters.
- TPO polyolefin-based thermoplastic elastomers
- TPS polystyrene-based thermoplastic elastomers
- TPA polyamide-based thermoplastic elastomers
- TPU polyurethane-based thermoplastic elastomers
- polyesters polyesters.
- TSV dynamically crosslinked thermoplastic elastomer
- polyolefin thermoplastic resin polystyrene thermoplastic resin
- polyamide thermoplastic resin polyamide thermoplastic resin
- polyester thermoplastic resin etc. Can be mentioned.
- thermoplastic material examples include a deflection temperature under load (0.45 MPa load) specified in ISO 75-2 or ASTM D648 of 78 ° C. or higher, and a tensile yield strength specified in JIS K7113 of 10 MPa.
- the tensile elongation at break (JIS K7113) defined in JIS K7113 is 50% or more.
- regulated to JISK7206 of 130 degreeC can be used.
- thermosetting resin refers to a polymer compound that forms a three-dimensional network structure as the temperature rises and cures.
- a thermosetting resin a phenol resin, an epoxy resin, a melamine resin, a urea resin etc. are mentioned, for example.
- resin materials include (meth) acrylic resins, EVA resins, vinyl chloride resins, fluorine resins, silicone resins, etc.
- General-purpose resin may be used.
- the tire skeleton half body 17A formed using a thermoplastic material can be formed by, for example, vacuum forming, pressure forming, injection forming, melt casting, etc., compared to the case of forming (vulcanizing) with rubber.
- the manufacturing process can be greatly simplified, and the molding time can be shortened.
- each portion of the tire frame member 17 is similar to a conventional general rubber pneumatic tire.
- a thermoplastic material having different characteristics may be used for the bead portion 12 and the like.
- An annular bead core 15 is embedded in the bead portion 12 of the tire frame member 17.
- the bead core 15 is made of a steel cord similar to a conventional general pneumatic tire. Note that the bead core 15 may be omitted if the rigidity of the bead portion 12 is ensured and there is no problem in fitting with the rim 20.
- the bead core 15 may be formed of a cord other than steel, such as an organic fiber cord or a cord coated with an organic fiber, and the bead core 15 is not formed of a cord but is formed of a hard resin by injection molding or the like. It may be.
- a reinforcing layer 28 formed of a steel cord 26 spirally wound is disposed on the crown portion 16 of the tire frame member 17.
- the reinforcing layer 28 corresponds to a belt disposed on the outer peripheral surface of the carcass of a conventional rubber pneumatic tire.
- a covering layer 24 is formed on the tire frame member 17 from the bead portion 12 to the outer side in the tire axial direction W of the crown portion 16.
- the end portion of the coating layer 24 on the bead portion 12 side is disposed on the tire inner side than the close contact portion of the bead portion 12 with the rim 20.
- the end portion of the coating layer 24 on the tread member 30 side is formed up to the outer end in the tire axial direction W of the crown portion 16.
- the coating layer material constituting the coating layer 24 a material having higher weather resistance than the tire frame member 17 is used.
- the coating layer material is preferably a material having better sealing properties than the material constituting the tire frame member 17.
- the elastic modulus of the coating layer 24 is preferably lower than the elastic modulus of the tire frame member 17.
- a tread member 30 is disposed on the outer side of the tire frame member 17 in the tire radial direction.
- the tread member 30 is disposed along the tire frame member 17 and constitutes a tire tread that is a ground contact portion of the tire 10.
- the tread member 30 is laminated on the tire frame member 17 via an intermediate rubber 34.
- the tread member 30 is made of rubber having higher wear resistance than the thermoplastic resin forming the side portion 14.
- the same type of rubber as that used in conventional rubber pneumatic tires can be used.
- the tread member 30 may be made of another type of thermoplastic resin that is more excellent in wear resistance than the thermoplastic resin forming the side portion 14.
- the tire manufacturing apparatus 39 includes a molding machine 40 (see FIG. 3) and an extruder 50 (see FIG. 8). As shown in FIG. 3, the molding machine 40 includes a pedestal 41 that is grounded to the floor surface. A geared motor 43 that rotates a horizontally disposed shaft 42 is attached to the upper portion of the pedestal 41.
- a support tool 44 that supports the tire frame half body 17A from the inner side in the tire radial direction is attached to the end portion side of the shaft.
- the support tool 44 includes a central attachment portion 45, an arm portion 46, and a tire support member 48.
- the center mounting portion 45 is formed with a hole 45A through which the shaft 42 is inserted.
- four pinching portions 45B projecting outward in the tire radial direction around the hole 45A are formed radially.
- Each sandwiching portion 45B has a shape in which two plates are arranged in the tire axial direction, and is attached so that the arm portion 46 is sandwiched between the two plates.
- a male screw 45C that is inserted into a long hole 46C, which will be described later, is fixed to one of the two plates that constitute the holding portion 45B.
- One end of the arm portion 46 is sandwiched between the sandwiching portions 45B and extends outward in the tire radial direction.
- the other end (tip portion 46A in the tire radial direction) of the arm portion 46 has a substantially fan shape in which the outer side in the tire radial direction widens toward the end, and the outer end has an arc shape.
- a long hole 46C is formed along the tire radial direction on the extension of the sandwiching portion 45B.
- a male screw 45C is inserted from one side of the arm portion 46 into the long hole 46C and protrudes to the other side.
- a set screw 46B having a female screw formed on the inner periphery is screwed onto the male screw 45C.
- Each arm part 46 can be individually expanded and contracted in the tire radial direction. At the time of expansion / contraction, the set screw 46B is loosened, the male screw 45C is moved along the long hole 46C, and the set screw 46B is tightened again at the moving position.
- the tire support member 48 is composed of eight divided pieces 48P, and has an annular shape when assembled to the arm portion 46.
- the outer diameter of the tire support member 48 is set larger than the inner diameter of the crown portion 16 of the tire frame half body 17A.
- One divided piece 48P has an arcuate outer peripheral surface 48A.
- a groove 48D is formed in an annular shape over the entire circumference at a position corresponding to the protrusion 32 of the tire frame half body 17A.
- One recess 48D is formed for one tire frame half body 17A, and two tire support members 48 are formed in total. Between the two recesses 48D, a joining recess 48C is formed linearly over the entire circumference.
- the joint recess 48C is disposed on the joint portion of the pair of tire frame half bodies 17A, that is, on the tire equatorial plane CL.
- a groove 48B is formed on the inner side in the tire radial direction of the divided piece 48P. 46 A of front-end
- the groove 48B has a deep outer side in the tire circumferential direction of the divided piece 48P and a shallow central part.
- the split piece 48P is assembled with the tip 46B of the arm 46 engaged with the groove 48B.
- the length of the arm portion 46 in the tire radial direction is adjusted according to the diameter of the tire support member 48.
- Four of the eight divided pieces 48P are arranged one by one at the center in the tire circumferential direction of the tip 46A. Further, the other four pieces are disposed across adjacent tip portions 46A.
- an extruder 50 for extruding the welding thermoplastic material 19 is disposed in the vicinity of the molding machine 40.
- the extruder 50 includes a resin discharge nozzle 52 that discharges the molten welding thermoplastic material 19 downward.
- the thermoplastic material 19 for welding is preferably the same type as the thermoplastic material constituting the tire frame member 17, but may be of a different type as long as it can be welded. If the same kind of material is used, the tire frame member 17 can be composed of one kind of thermoplastic material as a whole, so that the cost is low. If different materials are used, the thermoplastic material for the tire frame member and the welding thermoplastic material 19 for joining can be made to have materials having preferable characteristics.
- the cylinder device 54 is supported by the column 50A of the extruder 50 through a frame (not shown).
- a cooling air ejection nozzle 55 that ejects cooling air is disposed downstream of the leveling roller 53 in the tire frame member rotation direction.
- a fan 56 is disposed on the side opposite to the tire case rotation direction side of the resin discharge nozzle 52 (the direction opposite to the arrow A direction), and between the fan 56 and the resin discharge nozzle 52.
- a hot air blocking roller 57 is disposed.
- the fan 56 is supported by the support 50A of the extruder 50 through a frame (not shown).
- the fan 56 has a nozzle 56A that blows hot air toward the joint portion in order to preheat the joint portion between the one tire frame half body 17A and the other tire frame half body 17A.
- a cylinder device 58 that moves the hot air blocking roller 57 in the vertical direction is disposed above the hot air blocking roller 57.
- the cylinder device 58 is supported by the column 50A of the extruder 50 through a frame (not shown).
- the tire frame half body 17A in which the bead core 15 is embedded is molded by molding.
- the ridges 32 are formed integrally with the tire frame half body 17A by providing corresponding ridges in the mold. Since the protrusion 32 has a semicircular cross section, it is easy to perform die cutting.
- a coating layer 24 is formed from the bead portion 12 of the tire skeleton half body 17A to the front of the crown portion 16.
- the covering layer 24 can also be molded.
- a support 44 having an outer diameter slightly larger than the inner diameter of the tire frame half body 17A is assembled, and each tire frame half body 17A is connected to the tire support member from the tire axial direction W outer side. 48 is attached by fitting to the outer peripheral side. At this time, the ridges 32 of the tire frame half body 17 ⁇ / b> A are engaged with the ridges 48 ⁇ / b> D of the tire support member 48.
- the outer diameter of the support tool 44 is larger than the inner diameter of the tire frame half body 17A, movement of the tire frame half body 17A in the tire circumferential direction relative to the tire support member 48 can be suppressed. Further, since the protrusions 32 of the tire frame half 17A and the recesses 48D of the tire support member 48 are engaged, the movement of the tire frame half 17A in the tire axial direction W relative to the tire support member 48 is suppressed. Can do. Accordingly, the pair of tire skeleton halves 17A can be arranged at accurate positions.
- the extruder 50 is moved, and as shown in FIG. 8, the joining portion of the two tire skeleton halves 17A (the tire equatorial plane CL of the tire skeleton member 17) is replaced with a fan 56, a hot air blocking roller 57, and a resin. It is arranged below the discharge nozzle 52, the leveling roller 54 and the cooling air jet nozzle 55.
- the hot air blocking roller 57 and the leveling roller 53 are lowered, and the hot air blocking roller 57 and the leveling roller 53 are brought into contact with the outer periphery of the abutting portions of the two tire frame half bodies 17A.
- the hot air of the fan 56 is blown toward the joining part of a pair of tire frame half body 17A, rotating the tire frame member 17 supported by the tire support member 48 in the direction of arrow A.
- the surface of the part to which the thermoplastic material 19 for welding is attached is sequentially softened or melted (preheating step).
- the preheated portion moves to the downstream side in the rotation direction (arrow A direction side), and the molten thermoplastic thermoplastic material 19 pushed out from the resin discharge nozzle 52 is sequentially attached to the joining portion (joining step). ).
- the molten thermoplastic material 19 for welding is sequentially pressed from the radially outer side to the inner side by the leveling roller 53 to level the surface substantially flat, and a part of the tire is between the tire frame half 17A and the tire.
- the joining concave strip 48 ⁇ / b> C formed on the outer peripheral surface of the tire support member 48 is filled by being extruded radially inward.
- a substantially triangular recess formed by the tip 16B of one crown half 16A and the tip 16B of the other crown half 16A is filled with the thermoplastic material 19 for welding. It becomes a state.
- molten thermoplastic material 19 for welding is filled in the joint recess 48C, and the molten thermoplastic material 19 for welding adheres to the inner peripheral surface with a certain width from the abutting portion of the tip 16B. become.
- the welding thermoplastic material 19 is made to adhere to the inner peripheral surface of the outer peripheral side of the tire skeleton half body 17A and the bonding area is increased, high adhesive strength is obtained. It is particularly resistant to bending deformation.
- the welding thermoplastic material 19 adhering to the tire frame half body 17A is gradually solidified, the pair of tire frame half bodies 17A are welded by the welding thermoplastic material 19, and the two tire frame half bodies 17A are completely integrated.
- the converted tire frame member 17 is obtained.
- the extruder 50 is retracted, a cord supply device (not shown) is disposed in the vicinity of the support 44, and the heated reinforcing cord 26 is spirally wound around the outer peripheral surface of the tire frame member 17 to form a reinforcing layer. 28 is formed.
- the reinforcing cord 26 can be easily embedded in the resin material by winding the resin-coated steel cord while melting the resin by heating.
- the vulcanized belt-shaped tread member 30 is wound around the outer peripheral surface of the tire frame member 17 by one turn, and the tread member 30 is bonded to the outer peripheral surface of the tire frame member 17.
- the bonding is performed using an adhesive, unvulcanized rubber (when unvulcanized rubber is used, vulcanization for bonding is performed in a later step), and the like.
- the tread member 30 can use the precure tread used for the retread tire conventionally known, for example. This step is the same step as the step of bonding the precure tread to the outer peripheral surface of the base tire of the retreaded tire.
- the tire 10 is removed from the tire support member 48.
- the set screw 46B is loosened, and the arm portion 46 is contracted as shown in FIG. 9B.
- the distal end portion 46A is separated from the tire support member 48, and each divided piece 48P is removed from the inside of the tire frame member 17. In this way, the tire 10 is completed.
- protrusions 32 are formed on the inner surface in the tire radial direction of the crown half portion 16A of the tire skeleton half body 17A. Therefore, by engaging the ridges 32 with the recesses 48D formed on the outer surface in the tire radial direction of the tire support member 48, the movement of the tire skeleton half body 17A in the tire axial direction W with respect to the tire support member 48 is suppressed. be able to. Thereby, the tire frame half body 17A can be supported at an accurate position by the tire support member 48, and good bonding can be obtained.
- the ridge 32 has a semicircular cross section, the strength against deformation during rolling of the tire can be increased. Further, when the tire frame half body 17A is molded, it is possible to facilitate the die cutting.
- the ridges 32 do not necessarily have a semicircular cross section, and may have a square shape. However, it is preferable that the corners of the cross section of the ridges 32 have an R shape.
- the tire skeleton half 17A side is the ridge 32 and the tire support member 48 side is the recess 48D, but the tire skeleton half 17A side is the recess and the tire support member 48 side is convex. It is good also as an article.
- the tire frame half body 17A side as the ridges 32, compared with the case where the recesses are formed, a thin portion is not formed in the tire frame member 17, and the strength of the tire is increased. Can be maintained.
- a step is formed by increasing the thickness of the tip end 16B side of the crown half portion 16A of the tire frame half body 17A, and a step is also formed on the tire support member 48 side so as to correspond to the step. Also good.
- the ridges 32 are formed over the entire circumference of the tire frame half body 17A in the tire circumferential direction. Therefore, in each part in the tire circumferential direction, the tire frame half body 17A with respect to the tire support member 48 is formed. The movement in the tire axial direction W can be satisfactorily suppressed.
- line 32 was formed over the perimeter of the tire circumferential direction of 17 A of tire frame
- line 32 was divided
- line 32A may be arrange
- interval may be arrange
- a hemispherical convex sphere 32 ⁇ / b> B may be formed along the tire circumferential direction in place of the split ridge 32 ⁇ / b> A.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Tyre Moulding (AREA)
Abstract
Description
ここで、クラウン半部は、タイヤ径方向外側にトレッドを配置する領域であり、ビード部は、リムフランジと接触する部分である。また、サイド部は、クラウン半体とビード部との間の領域である。
(タイヤ構成)
まず、第1実施形態について説明する。図1に示すように、本実施形態のタイヤは内部に空気を充填して用いる空気入りタイヤである。タイヤ10は、タイヤ骨格部材17を備えている。タイヤ骨格部材17は、1対のビード部12と、ビード部12からタイヤ径方向外側に延びるサイド部14と、各々のサイド部14のタイヤ径方向外側端同士を連結するクラウン部16と、を備えている。
次に、本実施形態の空気入りタイヤ10のタイヤ製造装置39を説明する。
次に、本実施形態におけるタイヤ骨格部材の成形工程について説明する。
まず、モールド成形により、ビードコア15の埋設されたタイヤ骨格半体17Aを成形する。凸条32は、モールド内に対応する凹条を設けてタイヤ骨格半体17Aと一体的に成形する。凸条32は、断面半円状となっているので、型抜きが行いやすい。
また、タイヤ骨格半体17Aのクラウン半部16Aの先端16B側の厚みを厚くして段差を形成し、この段差に対応するようにタイヤ支持部材48側にも段差を形成して係合させてもよい。
上記実施形態では、凸条32をタイヤ骨格半体17Aのタイヤ周方向の全周に亘って形成したが、図10に示すように、凸条32は、タイヤ周方向で分割された分割凸条32Aで構成されていてもよい。
Claims (10)
- 樹脂材料で構成され、ビード部、サイド部、及び半幅のクラウン半部を有する一対のタイヤ骨格半体が、前記クラウン半部の先端で突き合わされて接合された、タイヤ骨格部材と、
前記クラウン半部のタイヤ径方向内側面かつ前記クラウン半部同士の接合部分よりもタイヤ幅方向外側に形成され、接合の際に前記一対のタイヤ骨格半体をタイヤ径方向内側から支持する支持具の外面と係合して、前記支持具に対するタイヤ軸方向の移動を規制する係合部と、
を備えたタイヤ。 - 前記係合部は、前記クラウン半部のタイヤ径方向内側面から突出した凸状であること、を特徴とする請求項1に記載のタイヤ。
- 前記係合部は、タイヤ周方向に沿って形成されていること、を特徴とする請求項1または請求項2に記載のタイヤ。
- 前記係合部は、タイヤ周方向の全周に亘って形成されていること、を特徴とする請求項3に記載のタイヤ。
- 前記係合部は、タイヤ周方向に複数に分割され、タイヤ周方向において不規則に配置されていることを特徴とする請求項3に記載のタイヤ。
- タイヤ径方向に伸縮可能とされ、タイヤ径方向外側へ延びる複数のアーム部と、
前記アーム部のタイヤ径方向外側に配置される先端部でタイヤ径方向内側から支持され、タイヤ周方向に複数に分割され、外面がタイヤ骨格部材の内周に沿った円環状とされて前記タイヤ骨格部材の内面に当接され、一対のタイヤ骨格半体をタイヤ径方向内側から支持するタイヤ支持部材と、
前記タイヤ支持部材のタイヤ径方向外面に形成され、前記タイヤ骨格半体同士の接合部分よりもタイヤ幅方向外側に形成された係合部と係合する支持係合部と、
を備えたタイヤ製造装置。 - 前記支持係合部は、前記タイヤ支持部材のタイヤ径方向外面に形成された凹状であること、を特徴とする請求項6に記載のタイヤ製造装置。
- 前記支持係合部は、タイヤ周方向に沿って形成されていること、を特徴とする請求項6または請求項7に記載のタイヤ製造装置。
- 前記支持係合部は、タイヤ周方向の全周に亘って形成されていること、を特徴とする請求項8に記載のタイヤ製造装置。
タイヤ製造装置。 - 請求項1~5のいずれか1項に記載のタイヤを請求項6に記載のタイヤ製造装置で製造するタイヤ製造方法であって、
前記係合部を前記支持係合部と係合させ、
前記一対のタイヤ骨格半体同士を樹脂材料を付加して接合し、
前記アーム部の先端部をタイヤ径方向内側へ退避させて前記タイヤ支持部材と離間させ、
前記タイヤ支持部材を前記タイヤ骨格半体の内側から取り外す、
タイヤ製造方法。
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US14/767,291 US20150367587A1 (en) | 2013-02-20 | 2014-02-17 | Tire, tire manufacturing apparatus, and tire manufacturing method |
CN201480009273.0A CN104995034B (zh) | 2013-02-20 | 2014-02-17 | 轮胎、轮胎制造装置及轮胎制造方法 |
EP14753629.6A EP2960078B1 (en) | 2013-02-20 | 2014-02-17 | Tire, tire manufacturing device, and tire manufacturing method |
JP2015501441A JP6301306B2 (ja) | 2013-02-20 | 2014-02-17 | タイヤ、タイヤ製造装置、及びタイヤの製造方法 |
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CN106715148A (zh) * | 2014-09-12 | 2017-05-24 | 株式会社普利司通 | 充气轮胎 |
CN107405953A (zh) * | 2015-03-24 | 2017-11-28 | 株式会社普利司通 | 非充气轮胎 |
CN112677707A (zh) * | 2019-10-17 | 2021-04-20 | 盐城固倍特轮胎技术有限公司 | 一种高承载力实心轮胎 |
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US9937757B2 (en) | 2013-03-05 | 2018-04-10 | Bridgestone Corporation | Tire |
JP2018065425A (ja) * | 2016-10-18 | 2018-04-26 | 株式会社ブリヂストン | タイヤ |
NL2021842B1 (en) | 2018-10-19 | 2020-05-13 | Vmi Holland Bv | Tire building drum and method for tire building |
JP6943275B2 (ja) * | 2019-10-10 | 2021-09-29 | 住友ゴム工業株式会社 | 空気入りタイヤ |
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JPWO2014129427A1 (ja) | 2017-02-02 |
EP2960078A1 (en) | 2015-12-30 |
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EP2960078B1 (en) | 2019-07-24 |
EP2960078A4 (en) | 2016-10-26 |
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CN104995034B (zh) | 2017-06-09 |
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