WO2005009727A1 - タイヤ構成部材の製造方法 - Google Patents

タイヤ構成部材の製造方法 Download PDF

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Publication number
WO2005009727A1
WO2005009727A1 PCT/JP2004/010389 JP2004010389W WO2005009727A1 WO 2005009727 A1 WO2005009727 A1 WO 2005009727A1 JP 2004010389 W JP2004010389 W JP 2004010389W WO 2005009727 A1 WO2005009727 A1 WO 2005009727A1
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WO
WIPO (PCT)
Prior art keywords
width
band
shaped member
cord
belt
Prior art date
Application number
PCT/JP2004/010389
Other languages
English (en)
French (fr)
Inventor
Yasuo Mizota
Original Assignee
Bridgestone Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Corporation filed Critical Bridgestone Corporation
Priority to US10/555,188 priority Critical patent/US7758714B2/en
Priority to EP04770862A priority patent/EP1650014A4/en
Publication of WO2005009727A1 publication Critical patent/WO2005009727A1/ja

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Classifications

    • 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
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/30—Applying the layers; Guiding or stretching the layers during application
    • B29D30/305—Applying the layers; Guiding or stretching the layers during application by feeding cut-to-length pieces in a direction parallel to the drum axis and placing the pieces side-by-side to form an annular element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/156—Coating two or more articles simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/435—Making large sheets by joining smaller ones or strips together
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7214—Fibre-reinforced materials characterised by the length of the fibres
    • B29C66/72141—Fibres of continuous length
    • 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)
    • B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
    • B29D30/42—Endless textile bands without bead-rings
    • 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)
    • B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
    • B29D30/46—Cutting textile inserts to required shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/355—Conveyors for extruded articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • 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
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/24—Drums
    • B29D2030/241—Auxiliary drums used for temporary storage of the layers before application to the building drums
    • 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)
    • B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
    • B29D30/42—Endless textile bands without bead-rings
    • B29D2030/421—General aspects of the joining methods and devices for creating the bands
    • B29D2030/423—Joining by overlapping
    • 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)
    • B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
    • B29D30/44—Stretching or treating the layers before application on the drum
    • B29D2030/4437—Adjusting the dimensions of the layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/10—Cords, strands or rovings, e.g. oriented cords, strands or rovings
    • B29K2105/101—Oriented
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10S156/906—Off-drum manufacture of tire fabric or ply
    • Y10S156/907—Off-drum manufacture of tire fabric or ply including assembly of bias-cut fabric
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y10T156/1075—Prior to assembly of plural laminae from single stock and assembling to each other or to additional lamina

Definitions

  • the present invention relates to a manufacturing method for forming a tire component member having a predetermined length by sequentially connecting cord-containing belt-shaped member pieces while overlapping their longitudinal edges.
  • a cord-containing band-shaped member is cut out into a plurality of narrow cord-containing band-shaped member pieces having a predetermined length, and the narrow cord-containing band-shaped member pieces are cut out.
  • a method of forming a tire component having a predetermined length by sequentially connecting the tire components while overlapping their longitudinal edges see Patent Document 1).
  • Patent Document 1 W ⁇ 02/055289
  • the width of the band-shaped member piece is obtained by adding the overlap margin ⁇ for the superposition of the cord-containing band-shaped member piece to the size ⁇ D / n obtained by dividing the circumferential length ⁇ D of the forming drum having a diameter D by an integer value ⁇ . ⁇ D / n +
  • the cord pitch p is determined by the performance required of the tire (eg, durability, driving stability of the vehicle, riding comfort of the vehicle, etc.) and the strength and elastic modulus of the fiber material to be applied.
  • the number of codes obtained by truncating the decimal point of ( ⁇ ⁇ / ⁇ + h) Zp is applied to the strip-shaped member pieces.
  • the width of the belt-shaped member is standardized and determined based on the number of cords and the code pitch p.
  • the width of the band-shaped member differs depending on the length of the wire pitch p.
  • the width guide of the band-shaped member must be adjusted each time, and this has been a factor of increasing the cost of the automation equipment.
  • the present invention has been made in view of its power, and its purpose is to change the code type by setting the width of the belt-shaped member to a desired constant length regardless of the code pitch.
  • the present invention provides a method for manufacturing a tire component that does not require adjustment of the width guide.
  • a cord-containing band-like member having at least one cord embedded therein is cut into a plurality of cord-containing band-like member pieces having a predetermined length, and a plurality of cord-containing band-like members are cut out.
  • the member pieces are sequentially joined while their longitudinal edges are overlapped with each other to form a tire component.
  • a method for manufacturing a tire component is provided, wherein a belt-shaped member having a predetermined constant width that is always related to a pitch of a cord in the tire component is used as the member.
  • the constant width of the strip can be obtained by increasing the calculated width of the strip obtained from the pitch of the cords in the tire component.
  • the predetermined constant width of the belt-shaped member can be determined based on the code pitch calculated from the predetermined length of the tire component.
  • the belt-shaped member is formed to a desired constant width regardless of the code pitch, so even if there is a change in the code type, the width guide does not have to be adjusted one by one, and automation is achieved. In equipment, cost can be suppressed.
  • the width of the belt-shaped member By setting the width of the belt-shaped member to an appropriate desired width, it is possible to form a tire component member of a predetermined length by sequentially connecting the band-shaped member pieces cut out from the force while overlapping their longitudinal edges. .
  • the predetermined constant width of the belt-shaped member is determined based on the code pitch calculated from the predetermined length of the tire component, and the tire component is always formed to a constant width. That can be S.
  • FIG. 1 is a view showing a schematic configuration of a ply forming step according to one embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of an example of a band-shaped member piece having a constant width while maintaining a predetermined code pitch.
  • FIG. 3 is a cross-sectional view of another example of a band-shaped member piece having a constant width while maintaining a predetermined code pitch.
  • FIG. 4 is a cross-sectional view of an example of a band-shaped member piece having a constant width in which a code pitch is changed.
  • FIG. 5 is a cross-sectional view of another example of a band-shaped member having a constant width with a different code pitch.
  • FIG. 6 is a cross-sectional view of an example of a conventional strip member.
  • FIG. 7 is a cross-sectional view of another example of a conventional strip member.
  • the belt-shaped member pieces are connected to form a ply as a tire constituent member.
  • FIG. 1 shows a schematic configuration of the ply forming step.
  • An extruder 10 has a cylinder 11 having a screw provided therein, and the cylinder 11 is supplied with various materials from a hopper 12.
  • the material supplied to the hopper 12 is a ply rubber material or the like, and the ply rubber material or the like supplied to the outside of the cylinder 11 is kneaded by the rotation of the screw to the tip of the cylinder 11. , And further supplied to an insulation head 13 and guided to a die 14 having a predetermined shape.
  • an inserter 15 is arranged behind the die 14 on the insulation head 13 of the extruder 10, and a predetermined number of wires as a cord wound out from a plurality of reels 16 arranged behind the die 14. 1 are arranged in a horizontal line at a predetermined wire pitch by an inserter 15 and supplied to the die 14 from behind.
  • the arrangement of the wires 1 is covered with ply rubber, formed into a predetermined shape through the die 14, and formed into a band-shaped member containing a wire. 2 are formed continuously.
  • the strip 2 is given a width B by the die 14.
  • the continuously formed belt-shaped member 2 is conveyed to the transfer drum 20 by a conveyor 17, and its longitudinal ends are regulated by a width guide 18 and positioned at a predetermined position on the peripheral surface of the transfer drum 20. Supplied to A cutter 19 is disposed in front of the transfer drum 20.
  • the transfer drum 20 is a large-diameter drum, with the rotating shaft directed in the conveying direction of the band-shaped member 2, and arranged at a position where the band-shaped member piece 3 cut into a fixed length by the cutter 119 is supplied to the uppermost portion. It has been.
  • the band-shaped member 2 positioned by the width guide 18 and attached to the peripheral surface of the transfer drum 25 is disposed along the side surface of the transfer drum 20 before being attached to the peripheral surface of the transfer drum 20.
  • the shell 19 is forked on the transfer drum 20 as a strip 3 cut into a predetermined length L by the cutter 19.
  • the band member 3 thus pasted is moved in the circumferential direction by a predetermined angle due to the rotation of the transfer drum 20, the next band member 3 is supplied, and the rear side of the band member 3 is supplied.
  • the strip-shaped member pieces 3 are sequentially pasted and connected such that the front-side longitudinal edge of the strip-shaped member piece 3 overlaps with the longitudinal-edge.
  • a predetermined number of band-shaped member pieces 3 are connected on the transfer drum 20, and a ply material 4 having a predetermined length in a direction orthogonal to the longitudinal direction is formed.
  • a molding drum 25 is disposed downstream of the transfer drum 20, and the molding drum 25 has an inner liner or the like as a base.
  • the transfer drum 20 is brought close to the molding drum 25, and the transfer drum 20 and the molding drum 25 When the two drums 20 and 25 are rotated in opposite directions with the ply material 4 interposed therebetween, the ply material 4 moves from the transfer drum 20 to the forming drum 25 and is transferred by the bonding of the members.
  • the length of the ply 4 is substantially equal to the circumference of the forming drum 25, so that the ply 4 is formed on the forming drum 25 into an annular ply having a front end and a rear end joined together.
  • the forming drum 25 has a diameter D of 15 inches (382 mm), and an integer value n for dividing the circumferential length ⁇ D is 30, where ⁇ ⁇ '382Z30 40 (mm), and assuming that the overlap margin a is small, the width of the band-shaped member 2 is approximately 40 mm.
  • the desired width of the belt-shaped member 2 is fixed to 40 mm. That is, a die having an opening width of 40 mm is used for the die 14 of the insulation head 13 regardless of the wire pitch.
  • the tire component formed by 24 wires has a width of 39.36 mm.
  • the inserter 15 uses a conventional one that arranges 24 wires at a pitch of 1.64 mm, thereby maintaining a predetermined wire pitch of 1.64 mm as shown in Fig. 2.
  • the width of the calculated band-shaped member 2 obtained from the same wire pitch, 39.36 mm is increased to 40 mm as a predetermined constant width, and the band-shaped member 2 is extruded.
  • the increase in the width of the band-shaped member 2 can be performed at one end of the band-shaped member 2 or at both ends.
  • the calculated width of the strip-shaped member 2 obtained from 17 wires is 38.59 mm.
  • the form uses a predetermined constant width of 40 mm, which is greater than its width of 38.59 mm.
  • a force inserter 15 using a die 14 with an opening width of 40 mm is used, which is a conventional one that aligns 17 wires at a pitch of 2.27 mm.
  • the width of the band-shaped member 2 is increased from the calculated width of the band-shaped member 2 and the band-shaped member 2 having a constant width of 40 mm is extruded.
  • the increase in the width of the band-shaped member 2 can be performed at one end of the band-shaped member 2 or at both ends.
  • the belt-shaped member 2 is formed to have a desired constant width of 40 mm regardless of the code pitch. Therefore, even if the code type is changed, the die 14 does not need to be replaced, and the width guide 18 in the post-process does not need to be adjusted one by one, and the cost can be reduced in the automated equipment.
  • the wire pitch p is set to the predetermined length, and in accordance with the force width of 40 mm, in the first example, 24 wires are evenly arranged including both end edges.
  • 24 wires are evenly arranged including both end edges.
  • use an inserter with a wire pitch of 1.67 ( 40/24) mm and use a die with an opening width of 40 mm, so that the wire shown in Fig. 4 has a pitch of 1.67 mm and includes both ends.
  • the strip members 2 having a desired width and a length of 40 mm, which are uniformly arranged, are extruded.
  • the band-like member 2 having the desired constant width of 40 mm in which the wires including the both ends are evenly arranged is formed. Even if the type is changed, the width guide 18 in the post-process does not have to be adjusted one by one, and the cost can be reduced in the automated equipment.
  • the present invention can be applied to forming a velvet as a force tire constituent member that forms a ply, and a cord embedded inside is made of a resin other than the wire. Can also be used.

Abstract

  少なくとも１本のコード（１）を埋め込んだコード入り帯状部材（２）を、所定長さ（Ｌ）の複数のコード入り帯状部材片（３）に切り出し、次いで、複数のコード入り帯状部材片（３）をその長手方向縁部を相互に重ねながら順次接合して、該長手方向に直交する方向に関して所定長さをもつタイヤ構成部材を形成する。この際、従来は、コード（１）の種類等の変更がある場合、コード入り帯状部材片（３）の幅（Ｂ）を決める押出機ダイ（14）や幅ガイド（18）をその都度調整していた。開示された発明では、タイヤ構成部材内のコード（１）のピッチに関係なく、同開口幅のダイ（14）を用いることにより、前記コード入り帯状部材（２）として、常に、予定の一定幅（Ｂ）をもつ帯状部材（２）を得るようにする。これにより、タイヤ構成部材の形成手順が簡略化される。

Description

明 細 書
タイヤ構成部材の製造方法
技術分野
[0001] 本発明は、コード入り帯状部材片をその長手方向の縁部を重ねながら順次連結して 所定長さのタイヤ構成部材を形成する製造方法に関する。
背景技術
[0002] タイヤ構成部材であるベルトやカーカスプライを形成するのに、コード入り帯状部材 を、所定長さの複数の狭幅のコード入り帯状部材片に切り出し、狭幅のコード入り帯 状部材片をその長手方向縁部を重ねながら順次連結して所定長さのタイヤ構成部 材を形成する方法が知られている（特許文献 1参照）。
特許文献 1 : W〇 02/055289
[0003] 帯状部材片の幅長は、直径 Dの成型ドラムの周長 π Dを整数値 ηで除算した大きさ π D/nに、コード入り帯状部材片の重ね合わせの重ね代 αを加算した π D/n + である。
一方でコードピッチ pは、タイヤに要求される性能 (例えば耐久性、車の操縦安定性 、車の乗り心地性能等）および適用される繊維材料の強度や弾性率などによって決 定され、よって 1本の帯状部材片には（π ϋ/η+ひ） Zpの小数点以下を切り捨てし た本数のコードが打ち込まれる。
[0004] 実際には、このコード本数とコードピッチ pとにより帯状部材の幅長が、規格化され て決定されている。例えばコードにワイヤーを用レ、、そのワイヤーピッチ pが 1.64mmの 第 1の例の場合、 24本のワイヤーで形成する帯状部材は、図 6に示すように 39.36 ( = 1.64 X 24) mmの幅長に規格統一されている。
[0005] また、ワイヤーピッチ pが 2.27mmの第 2の例の場合、 17本のワイヤーで形成する帯 状部材は、図 7に示すように 38.59 ( = 2.27 X 17) mmの幅長に規格統一されている。 発明の開示
発明が解決しょうとする課題
[0006] このようにワイヤーピッチ pの長さにより帯状部材の幅長が異なっていたため、後ェ 程で帯状部材を使用するに際して、コード種の切替えがあると、そのたびに帯状部材 の幅ガイドを調整しなければならず、 自動化設備においてはコストアップの要因とな つていた。
[0007] 本発明は、力かる点に鑑みなされたもので、その目的とする処は、コードピッチに関 係なく帯状部材の幅長を所望の一定長さにしてコード種の切替えがあっても幅ガイド を一々調整しなレ、ですむタイヤ構成部材の製造方法を供する点にある。
課題を解決するための手段
[0008] 上記目的を達成するために、本発明によれば、少なくとも 1本のコードを埋め込んだ コード入り帯状部材を、所定長さの複数のコード入り帯状部材片に切り出し、複数の コード入り帯状部材片をその長手方向縁部を相互に重ねながら順次接合して、該長 手方向に直交する方向に関して所定長さをもつタイヤ構成部材を形成するタイヤ構 成部材製造方法において、前記コード入り帯状部材として、前記タイヤ構成部材内 のコードのピッチに関係なぐ常に予定の一定幅をもつ帯状部材を用いることを特徴 とするタイヤ構成部材製造方法が提供される。
本発明のタイヤ構成部材製造方法では、前記帯状部材の一定幅は、前記タイヤ構 成部材内のコードのピッチから得られる帯状部材の計算上の幅を増すことにより得る こと力 Sできる。
[0009] 本発明のタイヤ構成部材製造方法では、タイヤ構成部材の前記所定長さから計算 されるコードピッチを基礎にして、帯状部材の前記予定の一定幅を決定することがで きる。
発明の効果
[0010] 力かるタイヤ構成部材製造方法によれば、コードピッチに関係なく帯状部材が所望 の一定幅に成形されるので、コード種の切替えがあっても幅ガイドを一々調整しない ですみ、自動化設備においてはコストの抑制を図ることができる。
帯状部材の幅は、適切な所望幅とすることで、これ力 切り出した帯状部材片をそ の長手方向縁部を重ねながら順次連結して所定長さのタイヤ構成部材を形成するこ とができる。
[0011] また、前述のように、タイヤに要求される性能および適用される繊維材料の強度や 弾性率などによって決定された所定のワイヤーピッチを維持したまま、帯状部材の幅 を、コードのピッチから得られる帯状部材の計算上の幅を増すことで、常に一定幅に 成形すること力できる。
[0012] 前述のように、タイヤ構成部材の前記所定長さから計算されるコードピッチを基礎に して、帯状部材の前記予定の一定幅を決定し、常にタイヤ構成部材を一定幅に成形 すること力 Sできる。
図面の簡単な説明
[0013] [図 1]本発明の一実施の形態に係るプライ成形工程の概略構成を示す図である。
[図 2]所定コードピッチを維持した一定幅の帯状部材片の例の断面図である。
[図 3]所定コードピッチを維持した一定幅の帯状部材片の別の例の断面図である。
[図 4]コードピッチを変えた一定幅の帯状部材片の例の断面図である。
[図 5]コードピッチを変えた一定幅の帯状部材片の別の例の断面図である。
[図 6]従来の帯状部材片の例の断面図である。
[図 7]従来の帯状部材片の別の例の断面図である。
符号の説明
[0014] 1…ワイヤー、 2…帯状部材、 3…帯状部材片、 4…プライ材、 10…押出機、 11…シ リンダ、 12…ホッパー、 13…インシュレーションヘッド、 14…ダイ、 15…インサータ、 16 …リーノレ、 17…搬送コンベア、 18…幅ガイド、 19…カッター、 20…転写ドラム、 25…成 型ドラム。
発明を実施するための最良の形態
[0015] 以下、本発明に係る一実施の形態について図 1ないし図 3に基づき説明する。本実 施の形態は、帯状部材片を連結してタイヤ構成部材であるプライを形成するものであ る。
[0016] 図 1にプライ成形工程の概略構成が図示されている。押出機 10には内部にスクリュ 一が設けられたシリンダ 11が延出しており、シリンダ 11にはホッパー 12から各材料が 供給される。
[0017] ホッパー 12に投入される材料は、プライ用ゴム材料等であり、シリンダ 11ないに投入 されたプライ用ゴム材用などはスクリューの回転で混練されながらシリンダ 11の先端ま で搬送され、さらにインシュレーションヘッド 13に供給されて所定形状のダイ 14に導か れる。
[0018] 一方、押出機 10のインシュレーションヘッド 13にはダイ 14の後方にインサータ 15が 配置され、さらに後方に配置された複数のリール 16から卷き出された所定本数のコー ドとしてのワイヤー 1がインサータ 15により水平一列に所定ワイヤーピッチで整列され てダイ 14に後方から供給され、このワイヤー 1の配列にプライ用ゴムが被覆されてダイ 14を通して所定形状に成形されてワイヤー入りの帯状部材 2が連続的に形成される。 帯状部材 2はダイ 14により幅 Bを与えられる。
[0019] 連続的に形成される帯状部材 2は、搬送コンベア 17により転写ドラム 20に搬送され 、その長手方向両端縁を幅ガイド 18により規制され中心位置決めされて転写ドラム 20 の周面の所定位置に供給される。転写ドラム 20の手前にはカッター 19が配置されて いる。
[0020] 転写ドラム 20は大径のドラムであり、回転軸を帯状部材 2の搬送方向に向け、カツタ 一 19により定長に切断された帯状部材片 3が最上部に供給される位置に配置されて いる。
[0021] 幅ガイド 18により位置決めされて転写ドラム 25の周面に貼り付けられる帯状部材 2は 、転写ドラム 20の周面に貼り付けられる前に、転写ドラム 20の側面に沿って配置され た前記カッター 19により所定長さ Lに切断された帯状部材片 3として転写ドラム 20に 貝占り付けられる。
[0022] こうして先に貼り付けられた帯状部材片 3は転写ドラム 20の回動により所定角度周 方向に移動したところへ次の帯状部材片 3が供給され、先の帯状部材片 3の後側の 長手方向縁部に、次に続く帯状部材片 3の前側の長手方向縁部が重なるようにして 順次貼り付け連結されていく。
[0023] 転写ドラム 20上で帯状部材片 3が所定枚数連結されて、前記長手方向に直交する 方向に関して所定長さのプライ材 4が構成される。
[0024] 転写ドラム 20の下流側には成型ドラム 25が配置され、成型ドラム 25は下地にインナ ライナーなどがある。
[0025] よって、転写ドラム 20を成型ドラム 25に接近させ、転写ドラム 20と成型ドラム 25との間 にプライ材 4を挟み、両ドラム 20， 25を互いに反対方向に回転すると、部材どうしの接 着によりプライ材 4は転写ドラム 20から成型ドラム 25に移動して転写される。
[0026] プライ材 4の長さは成型ドラム 25の周長に略等しぐよってプライ材 4は成型ドラム 25 上で前端部と後端部が接合された環状のプライが形成される。
本実施の形態では、成型ドラム 25は、直径 Dが 15インチ（382mm)であり、その周長 π Dを除算する整数値 nを 30として、 π
Figure imgf000007_0001
π ' 382Z30 40 (mm)であり、重ね代 aが僅かであるとして、概ね帯状部材 2の幅長は約 40mmである。
[0027] そこで、帯状部材 2の所望の幅長を 40mmに一定とする。すなわち、ワイヤーピッチ に関係なくインシュレーションヘッド 13のダイ 14に開口幅長 40mmのものを使用する。
[0028] 図 6に示すワイヤーピッチ pが 1.64mmの第 1の例の場合、 24本のワイヤーで形成す るタイヤ構成部材は、 39.36mmの幅長であつたが、本実施の形態では上記開口幅長 40mmのダイ 14を使用し、インサータ 15は 24本のワイヤーをピッチ 1.64mmで整列させ る従前のものを使用し、これにより、図 2に示すように所定のワイヤーピッチ 1.64mmを 維持したまま、同ワイヤーピッチから得られる計算上の帯状部材 2の幅である 39.36mmを、予定の一定幅としての 40mmに増して、帯状部材 2を押出し成形する。こ の予定の一定幅としての 40mmは、押出機 10のダイ 14の開口幅長により定まる。よつ て、帯状部材 2の幅の増量分は、 0.64 ( = 40-1.64 X 24) mmである。帯状部材 2の幅 の増量は、帯状部材 2の一方の端縁で行うことも、また両端縁で行うこともできる。
[0029] また、図 7に示すワイヤーピッチ pが 2.27mmの第 2の例の場合、 17本のワイヤーでか ら得られる計算上の帯状部材 2の幅は 38.59mmであるが、本実施の形態ではその幅 38.59mmよりも増した 40mmの予定の一定幅を用いる。このためには、開口幅長 40mm のダイ 14を使用する力 インサータ 15は 17本のワイヤーをピッチ 2.27mmで整列させる 従前のものを使用する.これによつて、図 3に示すように所定のワイヤーピッチ 2.27mm を維持したまま、帯状部材 2の幅を計算上の帯状部材 2の幅よりも増して、一定幅 40mmの帯状部材 2を押出し成形する。この例では、帯状部材 2の幅の増量分は、 1.41 ( = 40_2.27 X 17) mmである。帯状部材 2の幅の増量は、帯状部材 2の一方の端 縁で行うことも、また両端縁で行うこともできる。
[0030] このように帯状部材 2は、コードピッチに関係なく所望の一定幅 40mmに成形される ので、コード種の切替えがあってもダイ 14を交換することなぐまた、後工程の幅ガイ ド 18を一々調整しないですみ、 自動化設備においてはコストの抑制を図ることができ る。
[0031] 以上の実施の形態では、ワイヤーピッチ pは所定長さのまま使用していた力 幅長 40mmに合わせて前記第 1の例については 24本のワイヤーを両端縁を含め均等に配 列するとして、ワイヤーピッチを 1.67 ( = 40/24) mmとするインサータを使用し、ダイは 開口幅長 40mmのものを使用することで、図 4に示すようなワイヤーがピッチ 1.67mmで 両端を含め均等に配列された所望の幅長 40mmの帯状部材 2が押出し成形される。
[0032] また、前記第 2の例については 17本のワイヤーを両端縁を含め均等に配列するとし て、ワイヤーピッチを 2.35 ( = 40Zl7) mmとするインサータを使用し、ダイは開口幅長 40mmのものを使用することで、図 5に示すようなワイヤーがピッチ 2.35mmで両端縁を 含め均等に配列された所望の幅長 40mmの帯状部材 2が押出し成形される。
[0033] このように、所望の一定幅 40mmから逆算されるワイヤーピッチに変えることで、両端 縁を含めワイヤーが均等に配列された所望の一定幅 40mmの帯状部材 2が成形され るので、コード種の切替えがあっても後工程の幅ガイド 18を一々調整しないですみ、 自動化設備においてはコストの抑制を図ることができる。
[0034] 以上の実施の形態では、プライを形成するものであった力 タイヤ構成部材としてべ ノレトなどを形成するのにも当然適用でき、また内部に埋設されるコードもワイヤー以 外に樹脂製の糸なども用いることができる。

Claims

請求の範囲
[1] 少なくとも 1本のコードを埋め込んだコード入り帯状部材を、所定長さの複数のコード 入り帯状部材片に切り出し、複数のコード入り帯状部材片をその長手方向縁部を相 互に重ねながら順次接合して、該長手方向に直交する方向に関して所定長さをもつ タイヤ構成部材を形成するタイヤ構成部材製造方法において、
前記コード入り帯状部材として、前記タイヤ構成部材内のコードのピッチに関係なく 、予定の一定幅をもつ帯状部材を常に用いることを特徴とするタイヤ構成部材製造 方法。
[2] 前記帯状部材の一定幅は、帯状部材を押出す押出機のダイの開口幅により定める ことを特徴とする請求項 1記載のタイヤ構成部材製造方法。
[3] 前記帯状部材の一定幅は、前記タイヤ構成部材内のコードのピッチから得られる帯 状部材の計算上の幅を増すことにより得られることを特徴とする請求項 1記載のタイ ャ構成部材製造方法。
[4] タイヤ構成部材の前記所定長さから計算されるコードピッチを基礎にして、帯状部 材の前記予定の一定幅を決定することを特徴とする請求項 1記載のタイヤ構成部材 製造方法。
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JP2005041169A (ja) 2005-02-17
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US7758714B2 (en) 2010-07-20
JP4526791B2 (ja) 2010-08-18
US20060124233A1 (en) 2006-06-15

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