US20090301639A1 - Method and apparatus of fabricating carcass member for tire - Google Patents

Method and apparatus of fabricating carcass member for tire Download PDF

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Publication number
US20090301639A1
US20090301639A1 US12/162,421 US16242106A US2009301639A1 US 20090301639 A1 US20090301639 A1 US 20090301639A1 US 16242106 A US16242106 A US 16242106A US 2009301639 A1 US2009301639 A1 US 2009301639A1
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United States
Prior art keywords
cord
rubber
aligning
drum
rubber coated
Prior art date
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Abandoned
Application number
US12/162,421
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English (en)
Inventor
Shigeo Kudo
Tetsuo Tatara
Osamu Fujiki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Tire Corp
Original Assignee
Toyo Tire and Rubber Co Ltd
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 Toyo Tire and Rubber Co Ltd filed Critical Toyo Tire and Rubber Co Ltd
Assigned to TOYO TIRE & RUBBER CO., LTD. reassignment TOYO TIRE & RUBBER CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KUDO, SHIGEO, TATARA, TETSUO, FUJIKI, OSAMU
Publication of US20090301639A1 publication Critical patent/US20090301639A1/en
Abandoned legal-status Critical Current

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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)
    • B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
    • 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
    • B29D30/3028—Applying the layers; Guiding or stretching the layers during application by feeding a continuous band and winding it helically, i.e. the band is fed while being advanced along the drum axis, to form an annular element
    • 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
    • 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
    • B29D2030/3064—Details, accessories and auxiliary operations not otherwise provided for
    • B29D2030/3078—Details, accessories and auxiliary operations not otherwise provided for the layers being applied being substantially continuous, i.e. not being cut before the application step
    • 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
    • B29D2030/385—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre made by winding and joining a continuous reinforced rubber band onto a mandrel, to obtain a tubular article as an intermediate element in the manufacture of the insert
    • 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
    • B29D2030/385—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre made by winding and joining a continuous reinforced rubber band onto a mandrel, to obtain a tubular article as an intermediate element in the manufacture of the insert
    • B29D2030/386—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre made by winding and joining a continuous reinforced rubber band onto a mandrel, to obtain a tubular article as an intermediate element in the manufacture of the insert the tubular article being cut to obtain a flat, single-layer insert

Definitions

  • the present invention relates to a method and an apparatus of fabricating a carcass member used in a carcass layer of a radial tire.
  • a radial tire is formed by a plurality of tire constituting members.
  • a tire T is constituted by combining rubber members of an inner liner 2 , a tread 3 , a side wall 4 , a rim strip 5 and the like and tire reinforcing members of a carcass layer 1 , a belt layer 7 and the like including a cord made by a fabric or made by a metal.
  • Numeral 8 in the drawing designates a bead portion including a bead core 9 .
  • the carcass member (carcass ply) constituting the carcass layer of the radial tire there is used a so-to-speak topping sheet topped (covered) with rubber by constituting a core member by a number of pieces of cords for reinforcement.
  • such a carcass member for a tire uses a so-to-speak cord-like fabric of a comparatively wide width woven by constituting yarn mainly by a cord made by a synthetic fabric constituting a core member and roughly striking slender weft having as a connection at required intervals in yarn direction, rubber is topped to the cord-like fabric at a calendering step, at a next step, the fabric is cut to a predetermined width in accordance with a width of a carcass layer, the cords are directed in a transverse direction to be jointed successively to form in a shape of a long strip, thereafter, wound in a roll-like shape by interposing a separating cross to be jointed to be stocked, which is carried to a tire building step and is used by being cut to a predetermined length.
  • Patent Reference 1 and Patent Reference 2 disclose that by aligning a plurality of pieces of cords and passing the cords through a die for topping continuously provided with an extruder, rubber is topped to the cord rows to form into a strip-like shape, the strip-like member is cut by a predetermined length and the cut pieces are successively aligned to be bonded on a building drum or a conveyor, or the strip-like member is wound spirally on a drum for forming a sheet, the formed cylinder-like member is cut in a direction in parallel with a drum axis center (width direction) to form a carcass member in which the cord constitutes an angle of 90° substantially relative to a circumferential direction.
  • the invention resolves the above-described problem and provides a method and an apparatus of fabricating a tire carcass member capable of efficiently fabricating a carcass member for a tire used for a carcass layer of a radial tire by using one piece of a rubber coated cord coated with rubber, particularly, capable of providing a carcass member in which a cord for reinforcement makes an angle of substantially 90° relative to a tire circumferential direction and capable of easily adjusting a length or the like in accordance with a size.
  • the invention is directed to a method of fabricating a carcass member for a tire, characterized by passing one piece of a cord continuously through a die for coating rubber to coat the rubber on the cord, shaping the rubber coated cord to constitute a predetermined sectional outer shape, winding the rubber coated cord around an aligning drum having a circumferential length and a length in accordance with a width and a length of a carcass member constituting an object of fabrication to align to bond without producing a gap to form a cylinder-like member of a predetermined length, and thereafter, cutting the cylinder-like member in a direction in parallel with a drum axis center to be formed into a sheet-like shape.
  • one piece of the rubber coated cord is wound around the aligning drum without producing a gap, and therefore, although the cord is wound spirally, the cord substantially constitutes 90° relative to the cutting direction in parallel with the drum axis center. Therefore, a carcass layer a carcass cord of which constitutes an angle of substantially 90° relative to a tire circumferential direction can be constituted by using the carcass member in the sheet-like shape provided as described above by directing the cut end in the tire circumferential direction by converting longitudinal and transverse directions thereof.
  • the carcass member can be used as one sheet of the carcass member the same as that of the background art, and therefore, a number of joint portions are not produced as in a case of bonding a number of cut pieces of a strip-like member and there is not a concern of deteriorating a weight balance of a tire.
  • the cylinder-like member is formed by winding one piece of the rubber coated cord around the aligning drum, and therefore, a length in the circumferential direction of the carcass member, that is, a number of pieces of cords necessary for a length in an axial direction of the cylinder-like member can be set by a unit of one piece of the cord by increasing or reducing a number of times of winding the cord. Further, the length in an axial direction of the cylinder-like member can easily be adjusted by a unit of a dimension of an amount of one piece of the cord and can easily deal with also a change in a tire size.
  • the rubber coated cord is shaped such that the sectional outer shape constitutes an elliptical shape and the rubber coated cord is wound around the aligning drum, in accordance with a mode of the carcass member constituting an object of fabrication, the cord is wound by adjusting a direction of the elliptical shape.
  • a pitch of winding the cord can arbitrarily be changed by adjusting to change the direction of the elliptical shape such that, for example, the direction of a long diameter thereof is changed in any of a parallel direction, a skewed direction, or a vertical direction relative to the drum circumferential face, or the directions are mixed. Therefore, a number of pieces of the cords or a density thereof can freely be changed without changing a length in an axial direction of the cylinder-like member formed, that is, a length in a circumferential direction of the carcass member.
  • the length in the axial direction of the cylinder-like member formed that is, the length in the circumferential direction of the carcass member can be adjusted without changing the number of times of winding the cord on the aligning drum. That is, a carcass member having an aimed mode or property can easily be provided. Further, more number of kinds of modes of carcass members can be provided by combining to adjust a direction of the elliptical shape and adjust the number of times of winding the cord.
  • the rubber coated cord is passed through inside of a heating atmosphere until being wound around the aligning drum.
  • the coated rubber is cured to some degree, an aligning degree is increased by stabilizing a state of winding the cord around the drum, a carcass member having an excellent accuracy can be fabricated, and therefore, the coated rubber is made to be able to be thin-walled and also a vulcanization time period is made to be able to be shortened.
  • the invention is directed to an apparatus of fabricating a carcass member for a tire, characterized by including a portion of supplying one piece of a cord, a rubber coating die for coating rubber on the cord while passing the cord continuously drawn from the supply portion to shape in a predetermined sectional outer shape, an aligning guide having a guide hole for passing a rubber coated cord passing through the rubber coating die and capable of moving in a direction of being intersected with a direction of feeding the rubber coated cord, an aligning drum which is a drum wound with the rubber coated cord passing through the aligning guide, made to be rotatable centering on an axis center in parallel with the direction of moving the aligning guide and having a circumferential length in correspondence with a width of the carcass member constituting an object of fabrication, and a cutting apparatus for cutting a cylinder-like member formed by the rubber coated cord wound around the aligning drum in the direction in parallel with the drum axis center, wherein the aligning guide is constituted to be able to wind the rubber coated cord around the aligning drum
  • the rubber coated cord passing through the rubber coating die can accurately be wound around the drum to be bonded without producing a gap while being aligned by the aligning guide, further, the cylinder-like member aligned to be formed can easily be cut, and therefore, the fabricating method of the invention can excellently be embodied.
  • the rubber coating die is provided to shape the sectional outer shape of the rubber coated cord by an elliptical shape.
  • the aligning guide is provided such that a shape of a mouth portion of at least a delivery side end portion of the guide hole is made to constitute an elliptical shape in correspondence with the sectional outer shape of the rubber coated cord to be able to pivot centering on the guide hole, and is constituted to be able to change a direction of the elliptical shape by controlling to pivot the aligning guide in accordance with moving the aligning guide.
  • the length in the axial direction of the cylinder-like member formed that is, the length in the circumferential direction of the carcass member can easily be adjusted to change, or the number of times of winding of the cord, that is, the number of pieces of the cords of the carcass member fabricated can easily be changed without changing the length in the axial direction. Therefore, the carcass member of a desired mode can easily be provided.
  • a heating apparatus capable of heating the coated rubber of the rubber coated cord to some degree is provided at a portion of feeding the rubber coated cord from the rubber coating die to reach the aligning guide. Thereby, the coated rubber is cured to some degree by passing the rubber coated cord in the heating atmosphere, a state of aligning the cords wound around the aligning drum is stabilized to align and an accurate carcass member can be fabricated.
  • the aligning drum is provided with a slit for cutting and guiding the rubber coated cord in a width direction in parallel with the axis center of the drum main body at one portion in a circumferential direction of the drum main body, and a cylinder-like member formed by winding the rubber coated cord is made to be able to be cut along the slit by a cutter of the cutting apparatus.
  • the cylinder-like member by the rubber coated cord wound around the aligning drum can firmly be cut in a direction orthogonal to the direction of winding the rubber coated cord constituting substantially the drum circumferential direction. Therefore, the carcass member in a shape of a cut sheet can constitute a carcass layer in which the carcass cord constitutes an angle of substantially 90° relative to the tire circumferential direction by using the cut end by directing the cut end in the tire circumferential direction.
  • the carcass member for the tire used in the carcass layer of the radial tire can efficiently be fabricated by using one piece of the rubber coated cord coated with rubber.
  • the carcass member in which the carcass cord of the tire constitutes an angle of substantially 90° relative to the tire circumferential direction can be provided.
  • the length in accordance with the size can easily be adjusted and the number of cords can easily be adjusted in fabrication.
  • FIG. 1 and FIG. 2 are an outline plane view and an outline side view showing an outline of a step of embodying a method of fabricating a carcass member for a tire of the invention.
  • numeral 11 designates a supply portion of a cord C made by a synthetic fabric of nylon, a polyester or the like, and provided to be able to draw to supply continuously one piece of cord C wound around a bobbin by being subjected to be processed by a predetermined adhering agent.
  • Numeral 12 designates an elongating roll for correcting curl or warp or the like of the cord C drawn out as described above, and numeral 13 designates a guide roll.
  • Numeral 14 designates a rubber coating die constituted by providing an extruder 14 b for extruding to supply a predetermined rubber material continuously to a die main body 14 a having an inner hole portion for passing the cord C and is provided to coat rubber to the cord C passing the inner hole portion with rubber by a predetermined thickness.
  • an outer shape of a section by the coated rubber can be constituted by various shapes of a circular shape, and an elliptical shape, a polygonal shape of a rectangular shape of a section or the like and the like, it is preferable that the outer shape is constituted by an elliptical shape as in the embodiment illustrated in embodying.
  • a shape of a mouth portion 14 c at an end portion on a delivery side of the inner hole portion is constituted by an elliptical shape as shown by FIG. 3 such that the sectional outer shape of the rubber coated cord C 1 delivered by being coated with rubber can be shaped to constitute the elliptical shape.
  • the section of the outer shape by rubber R coated to the cord C of the section in the circular shape is constituted by the elliptical shape in the section.
  • a flatness of the elliptical shape that is, a ratio of a long diameter and a short diameter or the like can pertinently be set, preferably, a range of the long diameter is 1.2 through 1.5 relative to a short diameter 1.
  • a thickness of the coated rubber R is made to be, for example, 0.2 through 0.8 mm.
  • Numeral 15 designates a guide roll.
  • Numeral 16 in the drawings designates a heating apparatus of an electric heating type constituted by winding an electric heating line in a coil-like shape, provided such that the rubber coated cord C 1 passes through a heating atmosphere at inside of the heating apparatus 16 , thereby, the coated rubber R is made to be able to be heated to a degree of starting to be cured to some degree although the rubber is not completely cured.
  • Numeral 17 designates an elongating apparatus having a plurality of rolls provided successive to the heating apparatus 16 , which is provided to be able to remove warp or the like of the rubber coated cord C 1 .
  • Numeral 18 designates a guide roll.
  • Numeral 20 in the drawings designates an aligning guide for winding the rubber coated cord C 1 fed as described above, and numeral 30 designates an aligning drum for winding and aligning the rubber coated cord C 1 passing through the aligning guide 20 .
  • the aligning guide 20 includes a guide hole 21 for passing the rubber coated cord C 1 , supported movably in a transverse direction intersecting with a direction of feeding the rubber coated cord C 1 , that is, an axial direction of the aligning drum 30 and is provided to be able to pertinently control to move the aligning guide 20 . That is, the aligning guide 20 is provided to be able to align and wind the rubber coated cord C 1 passing through the guide hole 21 by a predetermined pitch to be bonded to the aligning drum 30 without a clearance therebetween by controlling a movement (particularly, a speed or the like) of the aligning guide 20 in accordance with a rotational speed of the aligning drum 30 and a thickness of the cord.
  • moving means of the aligning guide 20 various moving means (not illustrated) of a ball screw mechanism, a linear motor and the like can be utilized, all of the moving means are provided to be able to arbitrarily controlling the movement and capable of changing a pitch or the like of winding even in the midst of winding.
  • Numeral 22 designates guide means for moving the aligning guide 20 .
  • the aligning guide 20 is constituted such that at least a shape of a mouth portion at an end portion on a delivery side of the guide hole 21 is made to constitute an elliptical shape in accordance with the outer shape of the section of the rubber coated cord C 1 , the aligning guide 20 is provided pivotably centering on the guide hole 21 , and by being controlled to pivot in accordance with controlling to move the aligning guide 20 as described above, a direction of the elliptical shape (directions of long diameter and short diameter) can pertinently be changed.
  • pivoting means of the aligning guide 20 for example, as shown by FIG. 4 and FIG.
  • a gear 23 is provided at an outer periphery of the aligning guide 20 , a gear 24 brought in mesh with the gear 23 is provided to be driven to rotate by pertinent driving means (not illustrated), thereby, the pivoting means is provided to be able to control to pivot the aligning guide 20 .
  • the aligning drum 30 is provided such that an axis center thereof is rotatably supported to be in parallel with the movement direction of the aligning guide 20 , and by rotating the drum 30 , the cylinder-like member Al constituting the layer can be formed by spirally winding the rubber coated cord C 1 passing through the aligning guide 20 to be bonded without a clearance.
  • the aligning drum 30 is constituted by a drum in a shape of the circular cylinder a circumferential length of which corresponds to a lateral width W of a carcass member A constituting an object of fabrication shown in FIG. 12 and an axial direction length L 1 of which is longer than a length in a tire circumferential direction of the carcass member A, that is, a circumferential length of the carcass member A on a building drum at a building step.
  • a slit 31 for a cutting guide of a length L 2 slightly longer than a circumferential length of the carcass member 4 and slidely shorter than the axial length L 1 of the drum 30 is formed at one portion in the circumferential direction of the aligning drum 30 .
  • the slit 31 serves as a guide in cutting into which a blade tip portion of a cutter 35 of a cutting apparatus is brought, and it is not necessary that the slit 31 penetrates inside of the aligning drum 30 as shown by the drawing but the slit 31 can be formed also in a shape of an unpenetrated groove.
  • the aligning drum 30 can also be formed by using other metal material.
  • the cutter 35 may be any build of a cutter of a rotary blade, a side blade or the like so far as the cylinder-like member A 1 constituted by the rubber coated cord C 1 spirally wound around the aligning drum 30 can be cut at the portion of the slit 31 .
  • a reinforcement cord C continuously drawn from the supply portion 11 is passed through the elongating roll 12 and passed through the rubber coating die 14 while adjusting curl or warp thereof to thereby cover rubber R on a surface thereof.
  • the rubber coated cord C 1 coated with the rubber R is shaped to constitute the sectional outer shape by the elliptical shape and is delivered.
  • the rubber coated cord C 1 is passed in a heating atmosphere by the heating apparatus 16 to pertinently heat coated rubber to cure the coated rubber to some degree, thereafter, passed through the elongating apparatus 17 and guided to the aligning guide 20 , and the rubber coated cord C 1 passing through the aligning guide 20 is aligned to be wound around the aligning drum 30 by rotating the drum while gradually moving the aligning guide 20 in a direction in parallel with the axial direction of the aligning drum 30 .
  • the rubber coated cord C 1 is wound in a spiral shape by a predetermined pitch P in accordance with the thickness of the cord to bond without producing a gap to constitute a layer on the aligning drum 30 to thereby form a cylinder-like member A 1 having a predetermined length by the rubber coated cord C 1 ( FIG. 11 ).
  • the length in the axial direction of the cylinder-like member A 1 on the sheet forming drum 30 is set to a length in consideration of a desired joint margin of the length in the tire circumferential direction of the carcass member A constituting the object of fabrication.
  • the length in the axial direction of the cylinder-like member A 1 can be set by a number of times of winding the rubber coated cord C 1 , further, also the length can be adjusted by a unit of one piece of the cord by increasing or reducing the winding number of times and can be adjusted finely near to be stepless.
  • the pitch P in winding the rubber coated cord C 1 to the aligning drum 30 can be set in accordance with the thickness of the rubber coated cord C 1 to be able to bond the cord without producing the gap
  • the thickness of the rubber coated cord C 1 is determined by tan ⁇ of the width of the carcass member A constituting the object of fabrication, and therefore, for example, when the carcass member of the width of 560 mm is formed by using the rubber coated cord having the cord thickness (diameter) of 0.985 mm, the angle is almost near to 0°, and therefore, the winding angle becomes substantially 90° relative to the width direction in parallel with the drum axis center.
  • the carcass member A in a sheet-like shape having the predetermined width and the predetermined length can be provided as shown by FIG. 12 , by using the carcass member A in the sheet-like shape and directing the cut end in the tire circumferential direction by converting longitudinal and transverse directions, the carcass cord constitutes the angle of 90° substantially relative to the tire circumferential direction.
  • the sectional outer shape of the rubber coated cord C 1 constitutes the elliptical shape
  • the rubber coated cord C 1 is wound around the aligning drum 30 , by adjusting to change the direction of the elliptical shape of the guide hole 21 by pertinently pivoting the aligning guide 20 , the pitch P of the cord can be changed by changing a mode of aligning the rubber coated cord C 1 .
  • the direction of the long diameter of the elliptical shape can be changed to a skewed direction of a predetermined angle relative to the drum circumferential face as shown by FIG. 6 , or the direction of the long diameter of the elliptical shape can be changed to a direction orthogonal to the drum circumferential face as shown by FIG. 7 by constituting a reference by a case of making the direction of the long diameter of the elliptical shape of FIG. 4 by the direction in parallel with the drum circumferential face.
  • pitches P 1 , P 2 , P 3 of the cord in the respective aligning modes differ from each other within in the range of the difference between the long diameter and the short diameter of the elliptical shape to constitute P 1 >P 2 >P 3 .
  • the cord can be wound by mixing to combine a plurality of aligning modes to change the direction of the elliptical shape in the midst of winding.
  • the winding pitch or the like can finely be adjusted and the length in the axial direction by winding the rubber coated cord C 1 can pertinently be adjusted.
  • the pitch of winding the cord can arbitrarily be changed by using the same rubber coated cord C 1 , and a number of pieces or a density of the cord can freely be changed without changing the length in the axial direction of the cylinder-like member A 1 formed, that is, the length in the circumferential direction of the carcass member A, further, conversely, the length in the axial direction of the cylinder-like member A 1 formed, that is, the length in the circumferential direction of the carcass member A can be adjusted without changing the number of times of winding the cord on the aligning drum 30 .
  • the length of the carcass member A can easily be changed in accordance with the change of the tire size, an adjustment as in a case of spirally winding a strip-like member having a width is dispensed with and a carcass member having an aimed mode or property can easily be provided.
  • the carcass member A in the sheet-like shape fabricated in this way is constituted by the sheet-like shape by cutting the cylinder-like member constituted by winding a single piece of the rubber coated cord in the direction in parallel with the axis center, and therefore, the carcass member A can be used as one sheet of the carcass member and a number of joint portions are not produced as in a case of bonding a number of cut pieces of a strip-like member and there is not a concern of deteriorating a weight balance of the tire.
  • the embodiment can also be utilized in a case of providing a carcass member used in a tire in which a ply cord of a carcass layer is inclined at least to a tire circumferential direction, or a carcass member used in a tire in which a region constituting a radial direction substantially orthogonal to the tire circumferential direction (within 90° ⁇ 10°) and a region constituting a bias direction of 10 through 60° relative to the tire circumferential direction are mixed.
  • the cord is wound spirally to constitute a layer as a whole by changing the direction of inclining the cord by reversing the direction of moving the aligning guide 20 at every half rotation of the aligning drum 30 by constituting a reference by the portion of the slit 31 for cutting to form a cylinder-like member of a predetermined length similar to the above-described embodiment, thereafter, the cylinder-like member is cut at the portion of the slit 31 in the width direction in parallel with the drum axis center.
  • the method and the apparatus of fabricating the carcass member for a tire according to the invention can preferably be utilized for fabricating the carcass member used for the carcass layer of the radial tire.
  • FIG. 1 is substantially a plane view showing an outline of a step of embodying a method of fabricating a carcass member for a tire of the invention.
  • FIG. 2 is substantially a side view of the same.
  • FIG. 3 is substantially a front view showing a shape of a mouth portion of an end portion on a delivery side of a coating die of the same.
  • FIG. 4 is substantially a front view of a delivery side of an aligning guide of the same.
  • FIG. 5 is substantially a sectional view of the aligning guide of the same.
  • FIG. 6 is substantially a front view of the delivery side in a state of changing a direction of an elliptical shape of a shape of a mouth portion of the aligning guide of the same.
  • FIG. 7 is substantially a front view showing other example of a state of changing the direction of the elliptical shape of the mouth portion of the aligning guide of the same.
  • FIG. 8 is an explanatory view of a mode of aligning in which a direction of an elliptical shape of a rubber coated cord is changed.
  • FIG. 9 is substantially a plane view of an aligning drum of the same.
  • FIG. 10 is substantially a sectional view of the aligning drum of the same.
  • FIG. 11 is substantially a plane view of a state of winding the rubber coated cord on the aligning drum of the same.
  • FIG. 12 is a plane view of a state of cutting a cylinder-like member to be developed in a sheet-like shape.
  • FIG. 13 is a sectional view exemplifying a structure of a tire.
  • T . . . tire 1 . . . carcass layer, 2 . . . inner liner, 3 . . . tread, 4 . . . sidewall, 5 . . . rim strip, 7 . . . belt layer, 8 . . . bead portion, 9 . . . bead core, 11 . . . supply portion of reinforcement cord, 12 . . . elongating roll, 13 , 15 , 18 . . . guide rolls, 14 . . . rubber coating die, 14 a . . . die main body, 14 b . . . extruder of rubber member, 14 c . . . mouth portion, 16 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Tyre Moulding (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
US12/162,421 2006-01-30 2006-01-29 Method and apparatus of fabricating carcass member for tire Abandoned US20090301639A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/301452 WO2007086141A1 (fr) 2006-01-30 2006-01-30 Processus de production de materiau de carcasse pour pneu et appareil pour ce faire

Related Parent Applications (1)

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US20100170073A1 (en) * 2006-06-15 2010-07-08 Bridgestone Corporation Cord aligning device
US20210221174A1 (en) * 2018-08-21 2021-07-22 The Yokohama Rubber Co., Ltd. Method of manufacturing tire, forming system for tire, and tire

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DE112006003680B4 (de) * 2006-01-20 2018-01-04 Toyo Tire & Rubber Co., Ltd. Gürtelreifen und Verfahren zu seiner Herstellung
US8783317B1 (en) * 2013-03-14 2014-07-22 Richard O. Rhodes Method and apparatus for producing polymer solar collectors and heat exchangers
JP7099939B2 (ja) * 2018-11-26 2022-07-12 Ｔｏｙｏ Ｔｉｒｅ株式会社 タイヤ部材成型装置、タイヤ部材の検査方法およびタイヤ部材の製造方法

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US20100170073A1 (en) * 2006-06-15 2010-07-08 Bridgestone Corporation Cord aligning device
US8262065B2 (en) * 2006-06-15 2012-09-11 Bridgestone Corporation Cord aligning device
US20210221174A1 (en) * 2018-08-21 2021-07-22 The Yokohama Rubber Co., Ltd. Method of manufacturing tire, forming system for tire, and tire

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WO2007086141A1 (fr) 2007-08-02
US20110214817A1 (en) 2011-09-08
JPWO2007086141A1 (ja) 2009-06-18
JP4499802B2 (ja) 2010-07-07
DE112006003715T5 (de) 2008-12-11
DE112006003715B4 (de) 2019-06-27
US8156986B2 (en) 2012-04-17

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