WO1986001464A1 - Courroie cannelee tissee pour pneus; son procede et appareil de fabrication - Google Patents

Courroie cannelee tissee pour pneus; son procede et appareil de fabrication Download PDF

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Publication number
WO1986001464A1
WO1986001464A1 PCT/US1985/001033 US8501033W WO8601464A1 WO 1986001464 A1 WO1986001464 A1 WO 1986001464A1 US 8501033 W US8501033 W US 8501033W WO 8601464 A1 WO8601464 A1 WO 8601464A1
Authority
WO
WIPO (PCT)
Prior art keywords
belt
strip
channels
tape
tire
Prior art date
Application number
PCT/US1985/001033
Other languages
English (en)
Inventor
William J. Thomas
Original Assignee
Armstrong Rubber Company
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 Armstrong Rubber Company filed Critical Armstrong Rubber Company
Publication of WO1986001464A1 publication Critical patent/WO1986001464A1/fr

Links

Classifications

    • 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
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/26—Folded plies
    • B60C9/263—Folded plies further characterised by an endless zigzag configuration in at least one belt ply, i.e. no cut edge being present

Definitions

  • the present invention relates to woven belts for belted tires, either radial, bias belted or bias with belts, and more specifically, to a construction of the woven belt and the plurality of tapes which form the woven belt such that air is channelled from the interstices between these tapes during tire manufacture.
  • Belted tires utilize multiple ply composite belts to reinforce the tread region of the tire.
  • the tire in- eludes a carcass on the interior, a reinforcing composite belt adjacent to the carcass, and a tread region adhered to the composite belt and the carcass of the tire.
  • One type of composite belt system is a "cut belt” construction which consists of polymeric material reinforced with cords that are in the form of sheet like material cut along its edges. In a typical construction, two separate plies are used and the cords of one ply cross the cords of the second ply. In all cut belt systems, regardless of the number of plies, the cut cords are at the lateral edges of the belt, and are disadvantageous for several reasons including the tendency of the tread to separate in the region where the cut cords are exposed at the lateral edges of the tire.
  • a third type of belt is a "woven belt” and com ⁇ prises a plurality of tapes interwoven and laid surface to surface, wherein each tape comprises a elastomeric material reinforced with a plurality of spaced apart reinforcing cords extending lengthwise within the strip.
  • the tapes are typically woven in zig zag pattern so that the lateral edges of the belt are smooth, and do not contain exposed cord ends. When the tapes are woven in a zig zag pattern a large number of interstices are formed between the tapes. Examples of woven belts are disclosed in U.S. Patent Nos. 3,589,426; 3,674,079; 3,598,166; 3,720,569 and 3,720,570.
  • the woven belt is placed around the tire carcass, and a tread length is placed over the woven belt and "stitched" to the carcass and the belt.
  • the term "stitched” as known in the art means pressing the tread against the underlying belt and carcass to form an uncured tire, which is thereafter placed in a mold and cured under heat and pressure.
  • the tread is forced against the belt and carcass by two rollers, each of which is in contact with the tread and moves from the center of the tire to its shoulder as the tire is rotated.
  • air may become trapped in the interstices between the tapes of the woven belt, and may remain in the tire after the tire has been cured and is ready for use.
  • a tape for use in a woven belt of a tire comprises an elongate flat strip made from elastomeric material reinforced by a plurality of spaced apart rein ⁇ forcing cords.
  • the cords extend lengthwise in the strip and the strip has a generally rectangular cross section defined by upper and lower " surfaces and two edges.
  • a plurality of channels are formed in a surface of the strip and extend laterally between the edges thereof to permit air flow between the edges of a given strip.
  • an apparatus and a method for forming the channels in the tape or the woven belt formed from a plurality of tapes comprises a first cylindrical _ _
  • roller having an axis and a second cylindrical roller having an axis extending parallel to the axis of the first roller.
  • the rollers are spaced apart to accommodate pass ⁇ ing of the tape therethrough.
  • At least one of the rollers has an outer cylindrical surface including a plurality of protrusions extending axially along the outer surface of the roller and spaced from each other about the circumference of the roller. As the tape is passed between the rollers, the protrusions form channels in the tape. In the case where it is desirable to form channels in the woven belt formed from a plurality of tapes, the rollers are spaced apart to accommodate the woven belt and the protrusions form channels in the surface of the woven belt.
  • both rollers may have the protrusions on the outer surface thereof, and the protrusions of each roller are spaced so that the protrusions are located in face to face relation to provide two air channels, one on either side of the tape.
  • FIG. 2 shows an enlarged perspective and sectional view of a tape in accordance with the present invention
  • FIG. 3 shows a sectional view along the plane
  • FIG. 4 is an exploded sectional view showing the tape shown in FIG. 2 interwoven to form a woven belt and wherein the tread of the tire is being stitched to the belt and carcass;
  • FIG. 5 shows a perspective view of an apparatus for forming channels on both sides of a woven belt
  • FIG. 6 shows a perspective view of the belt shown in FIG. 5 during manufacture of a belted tire wherein the tread is being stitched to the belt and carcass of the tire.
  • the tape 12 comprises an elastomeric material reinforced by a plurality of spaced apart reinforcing cords 14 which extend lengthwise in the elongate strip. As shown in Figures 2 and 3, the strip has upper and lower surfaces 16 and 18 and edges 20 and 22.
  • the extruded tape binder is an elastomeric material such as uncured rubber or other suitable materials. Rubber as used herein means natural or synthetic elasto ⁇ meric polymers or copolymers, or mixtures thereof, useful in composite construction such as in tires.
  • the plurality of spaced cords may be made from polyester, aramid, glass, steel, nylon, cotton and other materials.
  • a tape in accordance with the present invention includes a plurality of channels 24 extending laterally with respect to the strip between the edges 20 and 22 to permit flow of air from edge to edge.
  • the channels are spaced apart from each other along the length of the strip.
  • the channels 24 extend laterally from edge to edge, and preferably extend at a right angle with respect to the lengthwise direction of the tape.
  • the channels are uniformally spaced from each other, but the spacing -6- CT/US85/01033
  • the channels may be irregular or may have a pattern other than that shown.
  • a tape having a plurality of channels is formed, it is interwoven to produce a woven belt 26 as shown in Figure 4.
  • the tapes can be woven in numerous patterns, such as those disclosed in the patents cited as prior art above.
  • a multi ⁇ tude of interstices 28 are formed between the edges of the tapes.
  • air may become entrapped in these interstices and small voids may be formed in the tire.
  • view ⁇ ing Figure 4 the large number of channels in these tapes form a grid-like network of passages which permits flow of air laterally within the belt.
  • the belt 26 is placed over a tire carcass 30 and a strip of tread 32 of uncured rubber is placed over the belt.
  • the uncured rubber of the tread 32 is in a soft uncured state and can be adhered to the woven belt 26 by downward pressure of rollers 34 and 36.
  • the rollers 34 and 36 are moved in the direction of arrows 38 and 40 from the center of the tire to the tire shoulder 42. Since the pressure is applied at the center of the tire by both rollers, air in the interstices near the center of belt 26 is driven laterally toward the shoulders of the tire.
  • the rol ⁇ lers 34 and 36 move outwardly from the center of the tire, the entrapped air continues to be forced outwardly toward the shoulder so that as the rollers move out outwardly and than down the shoulder of the tire, the air is expelled from the interior of the tire.
  • conventional tire making equipment may be used to expell the air, and no major redesign of the tire making ap ⁇ paratus is necessary.
  • pressure is applied to the tread and translated to the tapes 12.
  • the rubber of the tapes 12 during stitching flows as pressure is applied and a firm bond is provided between the tread and the tapes of the woven belt.
  • the tire is cured under pressure and heat and the tape rubber flows further to provide a bond between the tape rubber and the tread rubber.
  • the apparatus comprises first and second -cylin- drical rollers 50 and 52 each having an axis 54 and 56.-
  • Cylindrical roller 50 has an outer cylin ⁇ drical surface 58 including a plurality of protrusions 60 extending axially along the outer surface of the roller and spaced apart from each other the protrusions 60 have a generally rectangular cross section and provide a chan ⁇ nel in the tape having a substantially identical cross section.
  • the cylindrical surface 62 of roller 52 func- tions as an anvil, supporting the underside of the tape.
  • the tape After the tape 12 has passed through first and second cylindrical rollers 50 and 52, the tape includes channels on one side thereof. Depending upon the type of reinforcing cord used, an impression may be made on the surface opposite that in which the channels are formed. More specifically, it has been found that when using aramid and other synthetic reinforcing cords, a small channel is formed on the side of the tape opposite that in which channels are intended to be formed. These smaller channels may also aid in permitting air to be forced out of the tire during tire manufacture. In instances where it is desirable to form channels on both sides of the tape, the apparatus described below with respect to Figure 5 may be used.
  • the roller 70 includes protrusions 71 and is substantially identical to roller 50 in Figure 1 with the exception that the roller is wider so that it spans the entire width of woven belt 26.
  • Roller 72 is identical to roller 70 and includes a series of protrusions 74.
  • Rollers 76 and 78 are positioned on the side of woven belt 26 opposite re ⁇ spectively rollers 70 and 72.
  • Roller 70 extends in sub ⁇ stantially parallel in relation to roller 76.
  • Roller 78 also extends in substantially parallel in relation to
  • roller 72 As the woven belt 26 is passed through the two sets of rollers, it is first pressed on one side to provide channels 80 and then on the other to provide channels 82.
  • the channels 80 and 82 extend from one edge of the belt 26 to the other edge of the belt thus providing passages for the air to be expelled from the interstices of the belt.
  • the apparatus shown in Figure 5 is shown forming channels on a belt made from a plurality of tapes 12, rather than a single tape. If it is desirable to form channels on both sides of a tape, an apparatus similar to that shown on Figure 5 may be used wherein channels are formed on both sides of the tape by two opposed rollers each of which have protrusions.
  • the tire shown in Figure 6 corresponds to that of the tire shown in Figure 4 with the exception that the woven belt has lateral grooves 80 and 82 extending the entire width of the belt rather than the large number of grooves for each tape of the belt. It should be under- stood that during the stitching of the tread 90 onto the carcass 92, air is moved laterally outwardly from the center of the woven belt to the shoulder of the tire by the imposition of conventional stitching rollers which compose a force which is moved from the center of the tire toward the shoulder.
  • the channels 24 are formed having a sufficient depth to expose a length of the reinforcing cord. More specifi ⁇ cally, referring to Figure 2, the channels 24 have a depth sufficient to expose upper surfaces 25 of the cords 14.
  • the cords 14 are typically made from twisted strands having small air spaces between the strands. To the extent some air is not forced out of the tire through channels 24, such air may enter the reinforcing cord thereby avoiding or minimizing entrapment of air in the rubber.
  • a tape having a plurality of channels wherein the tapes are formed into a woven belt or, alternatively, a woven belt where the channels are formed in the belt provides distinct advantages over prior art constructions in that air that is typically entrapped in a conventional belted tire is forced out of the woven belt thus providing a tire with few or no voids.
  • the present invention is applicable to various types of belted tires including radial, bias belted or bias with belts type tires.

Abstract

L'invention concerne une courroie cannelée tissée, utilisée pour fabriquer un pneu, un procédé de fabrication de la courroie et le pneu composé de ces courroies. Une courroie tissée comprend une pluralité de rubans formés d'une bande allongée de matériau élastomère renforcée par une pluralité de cordons de renforcement. Les cordons s'étendent longitudinalement sur chaque bande allongée, et chaque bande comprend une pluralité de cannelures qui s'étendent latéralement sur la bande afin de permettre à l'air de s'écouler d'un bord à l'autre de la bande. Lorsque les bandes sont tissées et posées de façon à ce que leurs surfaces se touchent, une pluralité d'interstices se forme entre les rubans, et les cannelures permettent la sortie de l'air hors de la courroie tissée pendant la fabrication du pneu.
PCT/US1985/001033 1984-08-29 1985-06-03 Courroie cannelee tissee pour pneus; son procede et appareil de fabrication WO1986001464A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US64523484A 1984-08-29 1984-08-29
US645,234 1984-08-29

Publications (1)

Publication Number Publication Date
WO1986001464A1 true WO1986001464A1 (fr) 1986-03-13

Family

ID=24588194

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1985/001033 WO1986001464A1 (fr) 1984-08-29 1985-06-03 Courroie cannelee tissee pour pneus; son procede et appareil de fabrication

Country Status (9)

Country Link
EP (1) EP0191773A4 (fr)
JP (1) JPS62500092A (fr)
AU (1) AU581236B2 (fr)
CA (1) CA1259154A (fr)
ES (1) ES295958Y (fr)
MX (1) MX161301A (fr)
NO (1) NO853368L (fr)
PT (1) PT80963B (fr)
WO (1) WO1986001464A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1353087A1 (fr) * 2002-04-12 2003-10-15 ContiTech Antriebssysteme GmbH Courroie plate
EP1512520A1 (fr) * 2003-09-05 2005-03-09 Continental Aktiengesellschaft Dispositif de fabrication d'éléments ondulés pour pneus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4636429B2 (ja) * 2004-10-27 2011-02-23 横浜ゴム株式会社 未加硫ゴム部材の溝形成装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1220178A (en) * 1916-02-28 1917-03-27 Miller Rubber Co Method of and apparatus for applying rubber covers to tire-carcasses.
US1460599A (en) * 1922-04-08 1923-07-03 Nicholson Herbert Reenforced pneumatic-tire casing
US2650642A (en) * 1950-08-24 1953-09-01 Us Rubber Co Method of preventing blows in manufacture of pneumatic tires
US2685909A (en) * 1951-12-03 1954-08-10 Firestone Tire & Rubber Co Tread stitcher for tire machine assembly
US3712362A (en) * 1970-10-01 1973-01-23 S Alderfer A pneumatic tire without bead reinforcement rings
US3720569A (en) * 1970-09-03 1973-03-13 Deering Milliken Res Corp Endless reinforcement and method for producing same
DE2359216A1 (de) * 1972-12-01 1974-06-20 Dayco Corp Treibriemen und verfahren zur herstellung eines derartigen treibriemens
US3948304A (en) * 1973-10-05 1976-04-06 Uniroyal Raw pneumatic tire carcass and method of fabricating same
US4094354A (en) * 1977-03-09 1978-06-13 Uniroyal, Inc. Breaker reinforcing tape for belted pneumatic tires, and tires made therefrom
US4395298A (en) * 1980-11-10 1983-07-26 Dayco Corporation Method and apparatus for making toothed belts and belt made employing same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537500A (en) * 1969-03-07 1970-11-03 Firestone Tire & Rubber Co Tire construction
US3770042A (en) * 1970-09-03 1973-11-06 Deering Milliken Res Corp Endless reinforcement and method for producing same
US4002789A (en) * 1974-01-10 1977-01-11 Deering Milliken Research Corporation Endless reinforcement
US4045990A (en) * 1974-01-10 1977-09-06 Milliken Research Corporation Endless reinforcement
DE3401016A1 (de) * 1983-07-27 1985-02-14 Jonny 4000 Düsseldorf Janus Guertelreifen und verfahren zum herstellen desselben

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1220178A (en) * 1916-02-28 1917-03-27 Miller Rubber Co Method of and apparatus for applying rubber covers to tire-carcasses.
US1460599A (en) * 1922-04-08 1923-07-03 Nicholson Herbert Reenforced pneumatic-tire casing
US2650642A (en) * 1950-08-24 1953-09-01 Us Rubber Co Method of preventing blows in manufacture of pneumatic tires
US2685909A (en) * 1951-12-03 1954-08-10 Firestone Tire & Rubber Co Tread stitcher for tire machine assembly
US3720569A (en) * 1970-09-03 1973-03-13 Deering Milliken Res Corp Endless reinforcement and method for producing same
US3712362A (en) * 1970-10-01 1973-01-23 S Alderfer A pneumatic tire without bead reinforcement rings
DE2359216A1 (de) * 1972-12-01 1974-06-20 Dayco Corp Treibriemen und verfahren zur herstellung eines derartigen treibriemens
US3948304A (en) * 1973-10-05 1976-04-06 Uniroyal Raw pneumatic tire carcass and method of fabricating same
US4094354A (en) * 1977-03-09 1978-06-13 Uniroyal, Inc. Breaker reinforcing tape for belted pneumatic tires, and tires made therefrom
US4395298A (en) * 1980-11-10 1983-07-26 Dayco Corporation Method and apparatus for making toothed belts and belt made employing same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0191773A4 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1353087A1 (fr) * 2002-04-12 2003-10-15 ContiTech Antriebssysteme GmbH Courroie plate
WO2003086931A2 (fr) * 2002-04-12 2003-10-23 Contitech Antriebssysteme Gmbh Courroie plate utilisee dans la technologie des ascenseurs
WO2003086931A3 (fr) * 2002-04-12 2004-07-01 Contitech Antriebssysteme Gmbh Courroie plate utilisee dans la technologie des ascenseurs
EP1512520A1 (fr) * 2003-09-05 2005-03-09 Continental Aktiengesellschaft Dispositif de fabrication d'éléments ondulés pour pneus
WO2005032803A1 (fr) * 2003-09-05 2005-04-14 Continental Aktiengesellschaft Dispositif permettant de former des rainures sur des elements constitutifs de pneus de vehicule

Also Published As

Publication number Publication date
EP0191773A4 (fr) 1987-01-22
AU581236B2 (en) 1989-02-16
JPS62500092A (ja) 1987-01-16
CA1259154A (fr) 1989-09-12
AU4463785A (en) 1986-03-06
EP0191773A1 (fr) 1986-08-27
ES295958Y (es) 1988-01-16
NO853368L (no) 1986-03-03
PT80963A (en) 1985-09-01
ES295958U (es) 1987-07-16
MX161301A (es) 1990-09-05
PT80963B (pt) 1987-08-19

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