WO2015108074A1 - Courroie plane sans fin et procédé de fabrication associé - Google Patents

Courroie plane sans fin et procédé de fabrication associé Download PDF

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Publication number
WO2015108074A1
WO2015108074A1 PCT/JP2015/050821 JP2015050821W WO2015108074A1 WO 2015108074 A1 WO2015108074 A1 WO 2015108074A1 JP 2015050821 W JP2015050821 W JP 2015050821W WO 2015108074 A1 WO2015108074 A1 WO 2015108074A1
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WO
WIPO (PCT)
Prior art keywords
reinforcing cloth
rubber layer
flat belt
endless
cord
Prior art date
Application number
PCT/JP2015/050821
Other languages
English (en)
Japanese (ja)
Inventor
東英 岡村
良寛 小西
武士 窪田
小野　充昭
祥吾 山路
優嗣 藤井
匡史 松本
英太 野村
靖順 石切山
Original Assignee
ニッタ株式会社
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Filing date
Publication date
Application filed by ニッタ株式会社 filed Critical ニッタ株式会社
Publication of WO2015108074A1 publication Critical patent/WO2015108074A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G3/00—Belt fastenings, e.g. for conveyor belts
    • F16G3/10—Joining belts by sewing, sticking, vulcanising, or the like; Constructional adaptations of the belt ends for this purpose
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/22—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns
    • B29C66/221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns being in the form of a sinusoidal wave
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/22—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns
    • B29C66/223—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns being in the form of a triangle wave or of a sawtooth wave, e.g. zigzagged
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/22—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns
    • B29C66/225—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns being castellated, e.g. in the form of a square wave or of a rectangular wave
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/22—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns
    • B29C66/227—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns being in the form of repetitive interlocking undercuts, e.g. in the form of puzzle cuts
    • B29C66/2276—Other specific local geometries of interlocking undercuts not provided for in B29C66/2272 - B29C66/2274
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/22—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns
    • B29C66/229—Other specific patterns not provided for in B29C66/221 - B29C66/227
    • 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
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4324—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms for making closed loops, e.g. belts
    • 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
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4329—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms the joint lines being transversal but non-orthogonal with respect to the axis of said tubular articles, i.e. being oblique
    • 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
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B29D29/00—Producing belts or bands
    • 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
    • B29C66/01—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
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • B29C66/1162—Single bevel to bevel joints, e.g. mitre joints

Definitions

  • This embodiment relates to an endless flat belt suitable for applications such as high-speed transmission and precision transmission, and a method for manufacturing the same.
  • a belt in which both ends of a belt-like belt having a polyamide film as a core is joined is used as a flat belt used as a high-speed transmission belt.
  • a step is formed in the joint portion, and troubles are likely to occur in the high-speed running of the belt. Therefore, after processing both ends of the belt into a joint shape such as a sky bar joint or a finger joint, it is common to form an endless belt by bonding them together using an adhesive or thermal bonding.
  • the adhesive is usually poor in flexibility
  • the belt becomes partially hard at the joint portion, and stress tends to concentrate on that portion. For this reason, the durability of the belt, in particular the bending resistance, is likely to be reduced, resulting in a case where the service life is reached.
  • the joint portion is likely to have a thickness difference as compared with other belt portions, and causes belt running troubles such as belt vibration and noise, meandering and skewing during belt running at high speed transmission.
  • endless flat belts without joints are conventionally vulcanized by joining reinforcing cloths and covering the outer surface of a cylindrical mold according to the belt dimensions, arranging cord cores, and covering a rubber sheet or the like. Obtained by the method.
  • the belt itself has no joint and has excellent bending resistance.
  • the reinforcing cloth is often joined, and as a joining method, both ends of the reinforcing cloth are conventionally processed by sewing or fusion.
  • the joint portion has a convex shape, which causes the distance between the belt core and the pulley to vary. For this reason, belt running may become unstable, especially in high-speed transmission and precision transmission applications.
  • the belt may be used with a circumference of 30 m or more, and a belt excellent in running stability, long life, etc. is required. ing.
  • An object of the present invention is to provide an endless flat belt that can be easily manufactured and a method for manufacturing the same.
  • this embodiment has the following configuration.
  • One end portion of the reinforcing cloth has a convex portion protruding in the longitudinal direction of the belt, the other end portion has a concave portion corresponding to the convex portion, and the convex portion is inside the concave portion.
  • An endless flat belt characterized in that the endless flat belt is disposed on and bonded to each other.
  • the endless flat belt according to (1) which has a surface rubber layer on one side or both sides.
  • the cord core wire is an endless cord according to any one of (1) to (5), in which cord cords twisted in S-twist and cord cords twisted in Z-twist are alternately arranged Flat belt.
  • a process for producing an endless flat belt comprising: a step of performing vulcanization molding by pressing.
  • the reinforcing cloth formed in an endless shape is wound around at least two rotating rolls, and the rotating roll is rotated to wind the cord core wire in a spiral shape at a predetermined pitch in the width direction of the reinforcing cloth.
  • the method for producing an endless flat belt according to (7) wherein: (9) The method for producing an endless flat belt according to (7) or (8), wherein a rubber sheet for forming a surface rubber layer is superposed on the belt surface and vulcanized under pressure. (10)
  • the cord core wire is the endless cord according to any one of (7) to (9), in which cord cords twisted in S-twist and cord cords twisted in Z-twist are alternately arranged A method for producing a flat belt.
  • the convex portion formed in one end portion of the reinforcing cloth is arranged and bonded in advance in the concave portion formed in the other end portion. Therefore, the thickness difference of the joint portion that occurs when the belts are joined together as in the prior art is eliminated, and the vibration of the belt during high-speed transmission can be reduced. Therefore, there is an effect that the belt is excellent in durability and bending resistance, and the circumference of the belt can be freely designed, and even a belt having a long circumference can be easily manufactured.
  • FIG. 1 is a schematic cross-sectional view showing an endless flat belt according to an embodiment of the present invention. It is a schematic cross-sectional view showing an endless flat belt according to another embodiment of the present invention. It is a schematic cross-sectional view showing an endless flat belt according to still another embodiment of the present invention. It is process drawing for demonstrating one Embodiment of the manufacturing method of this invention.
  • (A)-(c) is explanatory drawing which shows the joining process of the reinforcement cloth in this invention. It is a perspective view which shows the joint part shape of the reinforcement cloth in this invention.
  • A)-(e) is a perspective view which shows the other joint shape of the reinforcement cloth in this invention. It is explanatory drawing which shows the winding process of the cord core wire in this invention. It is a perspective view which shows the joint shape of the comparative example 1. It is a perspective view which shows the joint shape in the comparative example 2.
  • 6 is a schematic cross-sectional view showing an endless flat belt of Comparative Example 2.
  • FIGS. 1 to 3 show endless flat belts having different forms.
  • An endless flat belt 15 shown in FIG. 1 includes an inner rubber layer 1 in which cord core wires 11 are spirally wound at a predetermined pitch in the width direction (indicated by an arrow W) of the endless flat belt 15; It consists of a reinforcing cloth 2 attached to one side of the inner rubber layer 1 and a surface rubber layer 3 attached to both sides.
  • the endless flat belt 16 shown in FIG. 2 has the same structure as the endless flat belt 15 except that the surface rubber layer 3 is stuck only on one side.
  • the endless flat belt 17 shown in FIG. 3 has reinforcing cloths 2 and 2 ′ attached to both surfaces of the inner rubber layer 1 in which the cord core wire 11 is embedded, and the reinforcing cloths 2 and 2 ′ are opposite to the inner rubber layer 1.
  • Each surface has a structure in which the surface rubber layer 3 is affixed to each other, and the others have the same structure as the endless flat belt 15.
  • the inner rubber layer 1 is formed by attaching a rubber sheet to at least one surface of the reinforcing cloth 2 or applying and drying liquid rubber on the surface of the reinforcing cloth 2, and the cord core wire 11 is embedded therein.
  • the material of the internal rubber layer 1 include nitrile rubber, carboxylated nitrile rubber, hydrogenated nitrile rubber, chloroprene rubber, chlorosulfonated polyethylene, polybutadiene rubber, natural rubber, EPM, EPDM, urethane rubber, and acrylic rubber. At least one selected from the group consisting of:
  • the thickness of the inner rubber layer 1 is preferably 0.1 to 2.0 mm.
  • a cord core wire 11 is embedded in the inner rubber layer 1 in the length direction of the belt.
  • the cord core wire 11 is spirally wound at a predetermined pitch in the width direction of the belt. It is preferable that the cord core wire 11 alternately arranges the cord core wire 11a twisted in the S twist and the cord core wire 11b twisted in the Z twist in order to suppress the skew during the belt running.
  • Examples of the material of the cord core wire 11 include at least one selected from the group consisting of polyester fiber, nylon fiber, aramid fiber, glass fiber, and carbon fiber.
  • the thickness of the cord core wire 11 is usually 110 to 11000 dtex, preferably 220 to 8330 dtex.
  • the reinforcing cloth 2 imparts durability to the belt.
  • a reinforcing cloth 2 is affixed to at least one side of the internal rubber layer 1.
  • the material of the reinforcing cloth 2 include woven cloth and knitted cloth such as polyester fiber, nylon fiber, aramid fiber, glass fiber, carbon fiber, and cotton. As will be described later, at least one side of the reinforcing cloth 2 is joined at both ends by finger joints or the like.
  • the surface rubber layer 3 is preferably one suitable for frictional transmission having a stable transmission capability between the belt and the conveyed product or power transmission device on the surface of the endless flat belt 15.
  • Examples of the material of the surface rubber layer 3 include nitrile rubber, carboxylated nitrile rubber, hydrogenated nitrile rubber, chloroprene rubber, chlorosulfonated polyethylene, polybutadiene rubber, natural rubber, EPM, EPDM, urethane rubber, acrylic rubber, Examples include silicon rubber.
  • the thickness of the surface rubber layer 3 is 0.1 to 10 mm, preferably 0.2 to 3 mm.
  • the surface rubber layer 3 may have a fine uneven pattern (so-called basis weight pattern) formed on the surface in order to prevent a decrease in the coefficient of friction with the conveyed product.
  • the pattern provided on the surface of the surface rubber layer 3 can be formed at the time of vulcanization molding, but may be before vulcanization or after vulcanization. Examples of the forming method include the following methods. A cloth pattern material is placed on the surface of the unvulcanized surface rubber layer 3 and then pressure vulcanized to strongly press the cloth pattern material against the surface rubber layer 3 surface. By proceeding with vulcanization as it is and peeling off the cloth pattern material after vulcanization is completed, the unevenness of the cloth pattern can be provided on the surface of the surface rubber layer 3.
  • the manufacturing method of the endless flat belt 15 according to this embodiment includes the following steps (I) to (V) and is performed in the order of steps (I) to (V).
  • a rubber sheet is attached to the surface of the belt-shaped reinforcing cloth 2, or liquid rubber is applied and dried, and then cut into a predetermined length. Adhesion of the rubber sheet may use an adhesive or may be performed by heating and pressing. The thickness of the rubber sheet to be used or the coating amount of the liquid rubber is adjusted according to the thickness of the inner rubber layer 1 to be formed.
  • the width W between the convex portion 4a and the concave portion 4b shown in FIG. 6 is usually 5 to 100 mm, preferably 10 to 30 mm, and the length L is usually 10 to 200 mm, preferably 50 to 150 mm.
  • the joint is formed orthogonal to the length direction of the reinforcing cloth 2, but as shown in FIG. It may be a finger joint shape (indicated by an arrow F1) formed in an inclined manner.
  • the shape of the finger joint is such that the convex portion 4a and the concave portion 4b are shapes other than an isosceles triangle, for example, a square shape, a substantially semicircular shape, a trapezoidal shape, as shown by arrows F2 to F5 in FIGS.
  • An uneven shape such as a convex shape may be used.
  • the method for forming the finger joint shape 4 on the reinforcing cloth 2 includes punching, but may be formed by cutting. After punching, it is sent to the next bonding process.
  • the endless reinforcing cloth 2 is wound around the cord winding device 7 composed of at least two axes of the driving pulley 7a and the passive pulley 7b to give an appropriate tension to the cord tension control device 6.
  • the cord core wire 11 whose tension is controlled is wound spirally at a predetermined pitch in the width direction of the reinforcing cloth 2 (winding process).
  • the cord core wire 11 is wound around the reinforcing cloth 2 to obtain a laminate 20 composed of the reinforcing cloth 2, the internal rubber layer 1, and the cord core wire 11.
  • the laminate 20 may be provided with the reinforcing cloth 2 on both surfaces of the internal rubber layer 1.
  • the cord core wire 11 is wound around the belt so that the cord core wire 11a twisted in the S twist and the cord core wire 11b twisted in the Z twist are alternately arranged in the width direction of the reinforcing cloth 2. It is preferable for preventing skew.
  • one or two or more guide rollers are provided between the drive pulley 7a and the passive pulley 7b of the cord winding device 7 to lengthen the stroke. do it.
  • ⁇ Process (V)> A sheet-like rubber material for forming the surface rubber layer 3 is superposed on both surfaces of the laminate 20 and heated and pressurized to simultaneously vulcanize and mold the inner rubber layer 1 and the surface rubber layer 3. The overlapping of rubber materials and vulcanization molding may be performed continuously. In this way, the endless flat belt 15 shown in FIG. 1 is obtained. Further, when a sheet-like rubber material for forming the surface rubber layer 3 is superposed on only one side of the laminate 20 and heated and pressurized, an endless flat belt 16 shown in FIG. 2 is obtained. Further, in the step (IV) shown in FIG.
  • the cord core wire 11 is spirally wound at a predetermined pitch in the width direction of the reinforcing cloth 2, and then the surface on which the reinforcing cloth 2 of the inner rubber layer 1 is pasted.
  • another reinforcing cloth 2 ′ is stuck to the opposite surface and the surface rubber layer 3 is formed on the outer surface of the reinforcing cloth 2, 2 ′, an endless flat belt 17 shown in FIG. 3 is obtained.
  • the reinforcing cloth 2 and the reinforcing cloth 2 ′ may be the same material cloth or different material cloths.
  • Example 1 A nitrile rubber sheet having a thickness of 0.4 mm was pasted on a polyester canvas (see FIG. 5A), and then punched into a saw blade to form convex portions and concave portions, respectively (FIG. 5B). reference). Next, the convex portion is placed inside the concave portion and pressed at 100 ° C. (see FIG. 5C). As shown in FIG. 6, the finger joint shape has a width W of 15 mm and a length L of 70 mm. A bonded endless canvas was formed.
  • an endless canvas was wound around the drive pulley 7a and the passive pulley 7b of the cord winding device 7 as shown in FIG.
  • a polyester cord core of 2200 dtex is spirally embedded in a nitrile rubber sheet of an endless canvas while controlling the tension with the tension control device 6 of the cord core, and consists of a canvas, a rubber layer, and a cord core.
  • An endless laminate was obtained.
  • a sheet of carboxylated nitrile rubber was stuck on both surfaces of the laminate, and vulcanization molding was performed.
  • an endless flat belt having a structure as shown in FIG. 1 and a thickness of 2 mm and a circumferential length of 1500 mm was obtained.
  • Example 2 After applying and drying nitrile rubber on the polyamide canvas so that the layer thickness is 0.2 mm, the joint portion was punched and pressed in the same manner as in Example 1 to form an endless canvas. Next, the obtained endless canvas was mounted on the outer surface of the cylindrical mold, and a polyester cord of 5000 dtex was spirally embedded in the nitrile rubber of the endless canvas. Thereafter, a polyamide canvas was wound around the outer surface, and carboxylated nitrile rubber sheets were stacked on both sides of the laminate, followed by vulcanization molding. In this way, an endless flat belt having a structure as shown in FIG. 3 and a thickness of 3.0 mm and a circumferential length of 1500 mm was obtained.
  • Example 3 A 0.4 mm nitrile rubber sheet was bonded to the polyester canvas to form an endless canvas bonded in the form of a finger joint in the same manner as in Example 1. Then, the endless laminated body which consists of a canvas, a rubber layer, and a cord core wire was obtained by the same method as Example 1. Next, a polyester canvas and a carboxylated nitrile rubber sheet were inserted during vulcanization molding to obtain an endless flat belt having a structure as shown in FIG. 3 and a thickness of 2.7 mm and a circumferential length of 1500 mm.
  • Example 4 A nitrile rubber sheet having a thickness of 0.4 mm was bonded to the polyester canvas, and an endless laminate composed of the canvas, the rubber layer, and the cord cord was obtained in the same manner as in Example 3. Next, a polyamide canvas and a carboxylated nitrile rubber sheet were inserted during vulcanization molding to obtain an endless flat belt having a structure as shown in FIG. 3 and a thickness of 2.7 mm and a circumferential length of 1500 mm.
  • Example 5 After applying a liquid nitrile rubber to a polyamide canvas so that the layer thickness is 0.2 mm and drying, both ends of the canvas are punched into an oblique uneven shape to form convex portions and concave portions. .
  • the convex portion is placed inside the concave portion and pressed at 100 ° C., and as shown in FIG. 7A, the convex portion has an oblique concave and convex shape having a width W ′ of 10 mm and a length L ′ of 80 mm.
  • a bonded endless canvas was formed. Thereafter, an endless flat belt having a structure as shown in FIG. 1 and a thickness of 2.0 mm and a circumferential length of 1500 mm was obtained in the same manner as in Example 1.
  • the endless flat belts obtained in Examples 1 to 5 have a smaller thickness difference between the belt joint and the main body than the belts of Comparative Examples 1 and 2, and the vibration width of the belt is small. It can be seen that it is greatly reduced. Therefore, the endless flat belt of the present embodiment can be suitably used in a wide range of applications such as conveyance of paper sheets and the like, and transmission of textile machines and general machine tools.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

L'invention concerne une courroie plane sans fin comprenant une couche interne de caoutchouc (1), une âme de corde (11) qui est intégrée dans la couche interne de caoutchouc (1) et est enveloppée en forme de spirale dans la direction en largeur de la courroie selon un pas prescrit, et un tissu de renforcement (2) qui est fixé à la couche interne de caoutchouc (1). Une extrémité du tissu de renforcement (2) présente des parties saillantes (4a) qui dépassent dans la direction en longueur de la courroie, et l'autre extrémité de celui-ci présente des renfoncements (4b) dont la forme correspond aux parties saillantes (4a). Les parties saillantes (4a) sont disposées à l'intérieur des renfoncements (4b) et collées à ceux-ci.
PCT/JP2015/050821 2014-01-15 2015-01-14 Courroie plane sans fin et procédé de fabrication associé WO2015108074A1 (fr)

Applications Claiming Priority (2)

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JP2014004932A JP2015132349A (ja) 2014-01-15 2014-01-15 無端状平ベルトおよびその製造方法
JP2014-004932 2014-03-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3578345A1 (fr) 2018-06-06 2019-12-11 Kunststoffwerk AG Buchs Composant composite en matière plastique
WO2023008335A1 (fr) * 2021-07-27 2023-02-02 ニッタ株式会社 Manchon à longueur circonférentielle variable et rouleau de transporteur à courroie

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017100848A (ja) * 2015-12-02 2017-06-08 ニッタ株式会社 無端状平ベルトおよびその製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000025123A (ja) * 1998-07-09 2000-01-25 Mitsuboshi Belting Ltd 平ベルトの製造方法
JP2001153186A (ja) * 1999-11-24 2001-06-08 Nitta Ind Corp 平ベルト
JP2007314895A (ja) * 2006-05-23 2007-12-06 Nitta Ind Corp 糸撚りベルト
JP2009242007A (ja) * 2008-03-28 2009-10-22 Nitta Ind Corp 平ベルト

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000025123A (ja) * 1998-07-09 2000-01-25 Mitsuboshi Belting Ltd 平ベルトの製造方法
JP2001153186A (ja) * 1999-11-24 2001-06-08 Nitta Ind Corp 平ベルト
JP2007314895A (ja) * 2006-05-23 2007-12-06 Nitta Ind Corp 糸撚りベルト
JP2009242007A (ja) * 2008-03-28 2009-10-22 Nitta Ind Corp 平ベルト

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3578345A1 (fr) 2018-06-06 2019-12-11 Kunststoffwerk AG Buchs Composant composite en matière plastique
CH715075A1 (de) * 2018-06-06 2019-12-13 Kunststoffwerk Ag Buchs Kunststoff-Composite-Bauteil.
WO2023008335A1 (fr) * 2021-07-27 2023-02-02 ニッタ株式会社 Manchon à longueur circonférentielle variable et rouleau de transporteur à courroie

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