WO2002032640A1 - Procede de fabrication de chenilles en caoutchouc - Google Patents
Procede de fabrication de chenilles en caoutchouc Download PDFInfo
- Publication number
- WO2002032640A1 WO2002032640A1 PCT/JP2001/004890 JP0104890W WO0232640A1 WO 2002032640 A1 WO2002032640 A1 WO 2002032640A1 JP 0104890 W JP0104890 W JP 0104890W WO 0232640 A1 WO0232640 A1 WO 0232640A1
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- WIPO (PCT)
- Prior art keywords
- vulcanization
- rubber
- vulcanization step
- mold
- crawler
- Prior art date
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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
- B29D29/00—Producing belts or bands
- B29D29/08—Toothed driving belts
- B29D29/085—Double-toothed driving belts
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- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/222—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length characterised by the shape of the surface
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- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/224—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length having a profiled section, e.g. tubes, rods
- B29C43/226—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length having a profiled section, e.g. tubes, rods having a corrugated section
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- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/28—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
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- 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
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- 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
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- 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
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- 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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
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- 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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
- B29C66/12841—Stepped joint cross-sections comprising at least one butt joint-segment comprising at least two butt joint-segments
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- 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
- B29C66/14—Particular design of joint configurations particular design of the joint cross-sections the joint having the same thickness as the thickness of the parts to be joined
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- 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
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- 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
- B29C66/49—Internally supporting the, e.g. tubular, article during joining
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- 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
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- 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
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- 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
- B29C2791/00—Shaping characteristics in general
- B29C2791/001—Shaping in several steps
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- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
- B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
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- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/26—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length in several steps
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- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/52—Heating or cooling
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- 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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2021/00—Use of unspecified rubbers as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/10—Cords, strands or rovings, e.g. oriented cords, strands or rovings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/709—Articles shaped in a closed loop, e.g. conveyor belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/709—Articles shaped in a closed loop, e.g. conveyor belts
- B29L2031/7094—Driving belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/775—Toothed articles
Definitions
- the present invention relates to a method for producing an endless rubber channel suitable for use in snow vehicles, construction vehicles, and the like, which are remodeled such as recreational vehicles (hereinafter referred to as “RV vehicles”).
- RV vehicles recreational vehicles
- the method shown in FIG. 1 is a basic manufacturing method, which is to form a belt-like rubber member 31 in which a reinforcing cord (not shown) is embedded as shown in FIG. 1 (a), as shown in FIG. 1 (b).
- the upper and lower molds 32, 33 are clamped, and the molds 32, 33 are further clamped and heated by hot plates 34, 35 to heat the band-shaped rubber member 31.
- the staggered thin-walled ends 36A and 36B of the crawler material 36 are overlaid to form an end joint as shown in Fig. 1 (c).
- FIG. 2 shows a manufacturing method called feed vulcanization, which is used to manufacture an endless rubber crawler having a relatively long circumference.
- a long strip-shaped rubber member 41 with a reinforcing cord embedded is used, and as shown in Fig. 2 (b), a relatively short upper and lower mold 42, 4 3 and the molds 42 and 43 are further sandwiched and heated by the hot plates 44 and 45 to partially add a predetermined length of the band-shaped rubber member 41.
- a crawler material 46 is sequentially repeated over the entire length of the belt-shaped rubber member 41 to form a crawler material 46, and this crawler material 46 is then replaced with a crawler material as shown in FIG. 2 (c).
- the staggered thin-walled ends 46 A and 46 B of the material 46 are overlapped and vulcanized by the upper and lower molds 42 and 43 and the hot plates 44 and 45.
- the endless rubber crawler can be manufactured.
- the band-shaped rubber members 31 and 41 must be formed in advance before the vulcanization step, so that the molding step and the molding apparatus are inevitable.
- the device for carrying the belt-shaped rubber member into the vulcanization process was dog-powered, and the production of the rubber crawler required a great deal of time and labor.
- the vulcanization method shown in Fig. 1 requires a large installation space due to the lengthening of the mold and hot plate, and further requires a bonding vulcanization step only at the ends, while the vulcanization shown in Fig. 2
- the mold and hot plate are miniaturized, but the vulcanization is repeated several to about 10 times for each predetermined length, which requires much more vulcanization time.
- there is a problem that the same end joining process as above is required.
- both ends of the belt-shaped crawler material 36, 46 including the reinforcing cord are vulcanized and joined, so that the reinforcing cord is overlapped at the joint.
- the conventional method is compatible with the high-speed rotation of the crawler as the vehicle speeds up. I could't do that.
- rubber 2 A, 2 B and 3 A, 3 B are vulcanized and bonded to the inner peripheral side and ground side of the endless ring-shaped reinforcing cord 1 by heating and pressing with molds 4, 5, 6.
- a middle die 6 disposed on the inner peripheral side of the endless ring-shaped reinforcing cord 1 and an upper die 4 and a lower die 5 disposed on the upper and lower sides of the outer peripheral side of the reinforcing cord, respectively.
- the relatively small upper and lower dies 4, 5 and the middle die 6 can be vulcanized at the same time for approximately half the circumference of the rubber crawler, and vulcanization is completed in two convenient vulcanization moldings. Therefore, it is possible to reduce costs by downsizing the carosulphurization facility, reduce the number of steps including the preparation step and vulcanization step, and embed the spiral reinforcing cord. By reducing the number of connection portions by sulfuric bonding, it is possible to impart sufficiently uniform strength characteristics on the circumference, and therefore, it is possible to manufacture a rubber crawler that can cope with high-speed running.
- the end portions of the vulcanized rubber parts 2A, 3A and 2B, 3B are positioned and arranged in the upper and lower dies 4, 5 and the middle dies 6 by, for example, several pitches. This is particularly important when a vulcanization method is used to ensure the mutual bonding of the rubber parts to be vulcanized in the respective vulcanization processes of the second and the second, and the relationship between the mold length and the circumference of the rubber crawler. Under such circumstances, the surrounding space is further reduced, which may reduce the handling workability of the rubber crawler at the time of demolding, and may hinder the arrangement of the tension device and the like in the surrounding space. was there.
- the present invention further improves the above-mentioned proposed technology to enable vulcanization molding of a rubber crawler with a sufficient margin for handling and the like, thereby improving workability and disposing auxiliary devices and the like. It is another object of the present invention to provide a method of manufacturing a rubber crawler that has also been simplified.
- the present invention is directed to a method of forming a reinforcing cord between a middle die disposed on the inner peripheral side of an endless ring-shaped reinforcing cord and upper and lower dies disposed on the outer peripheral side of the reinforcing cord.
- a method of manufacturing a rubber crawler comprising a secondary vulcanization step of molding, characterized in that in each vulcanization step, at least the middle mold is heated by the flow of a heat medium into a flow path provided therein. Is what you do.
- the end blocks arranged adjacent to the respective ends of the upper and lower dies and the middle dies are cooled in the first vulcanization step by the flow of the refrigerant into the flow channels provided there.
- At least one of the upper mold and the lower mold is also heated by flowing a heat medium into a flow path provided therein.
- the rubber portion cooled in the end block is vulcanized in the second vulcanization step to a crawler portion to be vulcanized and molded in the second vulcanization step. Sulfur bonding. More preferably, the vulcanization circumference in the first vulcanization step is made longer than the vulcanization circumference in the second vulcanization step, and the second vulcanization step is performed in the first vulcanization step. This is done with at least one pitch of each end part of the crawler part formed in the position set in each mold.
- the crawler portion formed in the first vulcanization step, the end portion positioned in each mold in the second vulcanization step, is slightly reduced in the second vulcanization step. More preferably, cooling is performed by the flow of the refrigerant to the flow path provided in the middle mold.
- FIG. 1 is a schematic view showing a vulcanization step of a conventional rubber channel manufacturing method.
- FIG. 2 is a schematic view showing a vulcanizing step of another conventional method for manufacturing a rubber roller.
- FIG. 3 is a schematic diagram showing a vulcanizing step of a rubber crawler production method on which the present invention is based.
- FIG. 4 is a schematic view showing a vulcanization mold used for carrying out the present invention.
- FIG. 5 is a side view showing a presetting process of the inner peripheral rubber to the middle mold in the manufacturing method according to the present invention.
- FIG. 6 is a side view showing a prepress process of the inner peripheral rubber into the middle mold in the manufacturing method according to the present invention.
- FIG. 7 is a side view showing a presetting step of the ground-side rubber to the lower mold in the manufacturing method according to the present invention.
- FIG. 8 is a side view showing a step of presetting the inner peripheral side rubber to the middle mold after the middle mold and the lower mold are turned upside down in the manufacturing method according to the present invention.
- FIG. 9 is a side view showing a first vulcanized state after the ground-side rubber has been set on the upper mold in the manufacturing method according to the present invention.
- FIG. 10 is an enlarged partial cross-sectional view showing a second vulcanized state.
- FIG. 11 is an enlarged partial cross-sectional view showing a second vulcanized state when the middle die is divided into upper and lower parts.
- the present invention provides a reinforcement between a middle die disposed on the inner peripheral side of an endless ring-shaped reinforcement cord and an upper die and a lower die disposed respectively on the upper and lower sides of the outer periphery of the reinforcement cord.
- the flow of a heat medium for example, steam
- the basic two-stage vulcanization production method of the present invention is the same as that shown in FIG. 3 except for the structure and action of the medium-sized vulcanized steel.
- a reinforcing cord 1 with or without coating rubber for example, wound spirally to form an endless ring, Vulcanization by heating and pressurizing the rubber 2, 3 attached to the inner circumference side and the ground side of the reinforcing cord with or without rubber coating of the conventional type that is connected with molds 4, 5 and 6
- Fig. 3 (a) a reinforcing cord 1 with or without coating rubber, for example, wound spirally to form an endless ring
- the total vulcanization perimeter in the first vulcanization step that is, a cross-section composed of the inner peripheral rubbers 2A and 2B and the ground rubbers 3A and 3B.
- the perimeter of the crawler part is the total vulcanization perimeter in the second vulcanization step, that is, the perimeter of the crawler part composed of the inner rubber 2C and 2D and the ground rubber 3C and 3D.
- the vulcanization perimeter in the first vulcanization step and the vulcanization perimeter in the second vulcanization step are substantially equal. If the length is increased, the mold temperature will be described later for the vulcanized crawler part that enters the mold due to the difference in vulcanization circumference during the second vulcanization process. By appropriately controlling in this manner, even when the same upper, middle, and lower molds are used, the adverse effects due to double vulcanization of the interconnected portion of the crawler portion can be effectively removed.
- the rubber connecting portion formed by the first and second vulcanization steps is preferably a male and female wedge fitting, for example, a convex section having a substantially V-shaped cross section in the longitudinal direction. It is configured to be joined by fitting with the concave portion, and at this time, a joining sheet or the like which promotes adhesion can be interposed in the fitting portion.
- the vulcanization mold used in the method of manufacturing a rubber crawler according to the present invention includes a middle mold 6, an upper mold 4 and a lower mold 5 arranged vertically with the middle mold 6 interposed therebetween.
- the upper mold 4 and the lower mold 5 have the same molding surface shape.
- FIGS. 4 (b) and 4 (d) which are viewed from arrows b and d in FIG. A number of lug forming grooves 4 A and 5 A are engraved respectively. Further, as shown in FIG. 4 (c), which is a view in the direction of arrow c in FIG. This is also true for the lower surface of the medium-sized 6. You. In FIG. 4A, the driving projection forming groove is indicated by 6B.
- the area surrounded by the outer mold protruding portions E1 and E2 described in FIG. 3 includes tension means for urging the reinforcing cable opening portion from the inner peripheral side. Auxiliary equipment will be provided.
- a characteristic feature of this molding die is that at least a large number of flow paths 7 are formed in the middle die 6 and a heat medium or the like, for example, steam is caused to flow through the flow paths 7 during vulcanization molding of rubber. It is in.
- the medium size 6 can be used as a heat source for vulcanization without using a hot plate or the like.
- the thickness can be reduced. Further, for example, by providing a phase difference of, for example, a half pitch between the formation positions of the drive protrusion forming grooves 6A and 6B on the upper surface and the lower surface of the middle die 6, the thickness can be further reduced. It is possible.
- the flow path 7 formed in the mold is provided in the middle mold 6 and the lower mold 5, and the upper mold 4 employs a conventional type in which a hot plate 8 is additionally provided.
- the lower mold 5 may be a conventional type, or the flow path 7 may be formed in both the upper mold 4 and the lower mold 5 to use the mold itself as a heat source for vulcanization.
- end blocks 11, 12, 13 are arranged adjacent to the ends of the upper and lower dies 4, 5, and the middle die 6, and these end blocks 11, 1, 2, 1
- a plurality of flow paths 14 are formed in 3, and a refrigerant, for example, cooling water flows through these flow paths 14 during vulcanization of rubber.
- these end blocks 11, 12, and 13 function to maintain the rubber portion that has entered the end block in the first vulcanization step in an unvulcanized state.
- the rubber portion acts as a connecting portion that is vulcanized and joined to the crawler portion that is vulcanized and molded in the second vulcanization step.
- the close pitch for the appropriate pitch that is arranged in the mold during the second vulcanization step is used.
- the flow of each type should be performed in the area corresponding to the end part. It is preferable to flow cooling water in the passage 7 instead of steam.
- FIGS. 5 to 9 are diagrams illustrating the primary vulcanization step corresponding to FIGS. 3A and 3B when the above-described mold is used. The main part of the secondary vulcanization step is shown in FIG.
- each lower drive projection forming groove 6 B formed on the lower surface of the middle die 6 (in FIG. On the other hand, the middle die 6 is turned upside down at the time of vulcanization.
- the unvulcanized driving projection rubber pieces 2 B 1 are respectively stored and the driving projection forming groove 6 B is removed (FIG. 4). (See (c))).
- a lower inner peripheral rubber 2B is formed by the driving projection rubber pieces 2B1 and the inner peripheral rubber pieces 2B2.
- the lower inner peripheral rubber 2B is pressed from above by a plate-shaped body or the like (not shown) via the reinforcing cord 1 to thereby form the driving protrusion rubber pieces 2B1 and 2B1.
- the unvulcanized driving projection rubber pieces 2 A 1 are stored in the respective upper driving projection forming grooves 6 A located on the upper surface of the middle die 6, and the projection forming grooves 6 A are formed.
- the belt-shaped upper inner peripheral rubber piece 2 A 2 is placed on the portion excluding A.
- the upper inner peripheral rubber 2A is composed of the driving protrusion rubber pieces 2A1 and the inner peripheral rubber pieces 2A2. Further, as shown in FIG. 9, the upper grounding rubber piece 3 A 1 is interposed on the upper reinforcing cord 1, and the upper die 4 containing the lug rubber piece 3 A 2 in the lug forming groove 4 A is mounted. And preset.
- an upper vulcanizing table 9 is set on the upper part of the upper die 4 via a hot plate 8
- a lower vulcanizing table 10 is set on the lower part of the lower die 5.
- end blocks 11, 12, 13 are arranged adjacent to the ends of the upper and lower dies 4, 5 and the middle die 6, and these end blocks 1, 1, 2, The flow of cooling water as a refrigerant is made possible through the plurality of flow paths 14 in 13.
- the temperature of the crawler which has been vulcanized, is reduced to about 130 ° C. by passing water through passage 7, for example, instead of steam, to remove the crawler. I do. Instead of such forced cooling of the mold, it is also possible to allow it to cool naturally.
- the semi-finished rubber crawler that is, the crawler part
- the mold is closed by filling the rubber material again, and the secondary vulcanization is performed by passing steam through the flow path 7.
- the unvulcanized portion of the end portion of the crawler portion is securely attached to the crawler portion formed by vulcanization in the second vulcanization step without excessive vulcanization. Vulcanization bonding.
- the steam is supplied to the channel 7 in the same manner as described above. Instead, water is circulated to lower the mold temperature to about 130 ° C, and then the crawler part is removed to produce the required rubber crawler.
- the upper vulcanization stage 9 and the lower vulcanization stage 10 are separated from each other in the first vulcanization step, and the upper and lower dies 4, 5 and the middle die 6 are separated from the crawler portion.
- the rubber crawler semi-finished product is moved in the circumferential direction at the working position by human power or a crane, or by an appropriate method such as roller driving, and is set to the position shown in FIG. Move to secondary vulcanization step. In this case, end blocks 11, 12, and 13 are removed.
- the end block It is also possible to perform this without using 11, 12, and 13.
- the primary vulcanization step and the secondary vulcanization step are performed with the same mold.
- each vulcanization step can be performed by another mold. In the latter case, when the semi-finished rubber crawler is set in the mold in the second vulcanization step, it is advantageous that the residual rubber in the mold is excessively vulcanized by the residual heat of the mold. It can be prevented.
- the vulcanization bonding between the crawler portions may be, for example, at least prior to the first vulcanization step, at least the rubber portion that becomes vulcanized rubber in the first vulcanization step 2A, 2B, 3A, and 3B are bonded with a release sheet having irregularities on the joint surface, and after vulcanization, the release sheet is peeled to form irregularities on the joint surface.
- A, 2B, 3A, 3B and the rubber parts 2C, 2D, 3C, 3D in the second vulcanization step are vulcanized and joined, a surface like Ox canvas can be obtained.
- a common sheet-like material with concaves and convexes as a release sheet, it is possible to easily apply irregularities to the bonding surface of the rubber part and improve the adhesiveness. It is also possible to omit troublesome steps such as puff work.
- the rubber portion 2A in the first vulcanization step When an adhesive sheet made of adhesive rubber or the like is interposed between the joints of 2B, 3A, 3B and the rubber parts 2C, 2D, 3C, 3D in the second vulcanization step and vulcanized and joined In the second vulcanization step, the rubber part 2C, 2D, 3C, 3D is vulcanized, and at the same time, the adhesive sheet which is unvulcanized rubber is vulcanized. 2A, 2B, 3A, 3B and the rubber parts 2C, 2D, 3C, 3D in the second vulcanization step can be joined well.
- the adhesive sheet although the bonding surface of the rubber portions 2 A, 2 B, 3 A, and 3 B after vulcanization in the first vulcanization step has fine irregularities formed by a peeling sheet, If the uncured rubber part 2C, 2D, 3C, 3D in the secondary vulcanization process is a flat surface, the surface of the adhesive sheet on the rubber part 2C, 2D, 3C, 3D side is uneven May be formed.
- the sulfur content of the adhesive sheet is determined by the rubber parts 2A, 2B, 3A, 3B in the primary vulcanization step and the rubber parts 2C, 2D, 3C, 3D in the secondary vulcanization step.
- the sulfur content is determined by the rubber parts 2A, 2B, 3A, 3B in the primary vulcanization step and the rubber parts 2C, 2D, 3C, 3D in the secondary vulcanization step.
- the vulcanization circumference in the first vulcanization step is larger than the vulcanization circumference in the second vulcanization step, and the end portions of the dies 4, 5, and 6 in the second vulcanization step Therefore, when the end portion of the crawler portion after the primary vulcanization step is positioned again in the mold by at least one pitch, preferably several pitches, an area corresponding to the positioning portion is provided. Then, by flowing cooling water in place of steam in each mold, and in the flow path 7 in the middle mold 6 and the lower mold 5 as shown in the figure, excessive positioning of each positioning portion in the second vulcanization step is performed. Vulcanization can be effectively prevented.
- the vulcanization circumference in the first vulcanization step and the thickness of the middle mold 6 are related. If the degree of bending of the vulcanized part becomes too large, for example, as shown in FIG. The degree of bending of the vulcanized portion can be effectively reduced by displacing the divided portions as necessary.
- the shapes of the upper, lower, and middle dies that is, the shapes of the rubber crawlers (or the middle A plurality of rows of drive projection forming grooves, each of which is provided with a projection of each metal core and vulcanized, etc.) Reinforcing cord type (endless by spiral winding, end connecting part by parallel cord) Object, with bias cord, rubberized them, etc.), shape, shape of end block, number and direction of passages in the end block and each mold (width direction, length direction, combinations thereof, etc.) ), Its configuration (especially for medium-sized ones, it is also possible to provide a hot plate in addition to the steam passage if it is extremely thin), the preset configuration of the inner peripheral rubber and the grounding rubber, Next vulcanization process Beauty Oyo joint shape of the junction of the rubber portion of the rubber portion and a secondary vulcanization step takes, for the joint vulcanization forms and the like comprising a redundant
- a middle die arranged on the inner peripheral side of the endless ring-shaped reinforcing cord, and an upper die and a lower die disposed respectively on the upper and lower sides of the outer peripheral side of the reinforcing cord.
- a primary vulcanization step of simultaneously heating and pressurizing the inner peripheral rubber and the ground side rubber for approximately half the circumference of the reinforcing cord and vulcanizing and molding the same, following the same step.
- the method for producing a rubber crawler which comprises a second vulcanization step of vulcanizing and molding the remaining approximately half circumference, in each vulcanization step, at least a medium mold is flowed into a flow path provided there.
- the thickness of at least the middle mold can be greatly reduced, so that the vulcanization of the rubber crawler with sufficient margin for the reinforcing cord or crawler part at the outside of the mold during vulcanization becomes possible.
- Workability of work such as Other capable, arrangement of the auxiliary device such as the tensioning means is facilitated, and since between the placement portion of the mold outside the projecting portion and the mold is smoothly continuous, excessive force Does not act on the vulcanized part and the like, and vulcanization accuracy can be improved.
- the first vulcanization is performed. It is possible to prevent the vulcanized joint portion from being excessively vulcanized during the second vulcanization process, by maintaining the uncured state of the joint end portion of the crawler portion to be vulcanized by the process, It does not cause rubber deterioration or strength reduction.
- each vulcanization step when at least one of the upper mold and the lower mold is heated by the flow of the heat medium into the channel provided therein, the thickness of the upper mold and the lower mold may be reduced. it can.
- the vulcanization circumference in the first vulcanization step is made longer than the vulcanization circumference in the second vulcanization step, and the second vulcanization step is formed in the first vulcanization step. If at least one pitch of each end of the crawler portion is positioned and arranged in each mold, the existing crawler portion formed in the second vulcanization step The vulcanization bonding to the crawler portion can be performed sufficiently smoothly and with high accuracy, the pitch accuracy of the vulcanization bonding portion can be improved, and lag cracks due to rubber flow can be prevented.
- the end portion of the crawler part formed in the first vulcanization step which is positioned in each mold in the second vulcanization step, is placed in the second vulcanization step.
- cooling by the flow of the refrigerant to the flow path provided in the middle mold enables the common use of each mold in the second-stage vulcanization, and positioning in the mold in the second vulcanization process
- the pitch number of the end portion of the crawler portion to be arranged can be freely selected, and excessive vulcanization of the positioning and arrangement portion can be more effectively prevented.
- the degree of freedom in vulcanization molding of the crawler portion is increased, the vulcanization moldability and workability are greatly improved, and the arrangement of auxiliary devices and the like is provided. Can also be easier.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002535862A JP4159871B2 (ja) | 2000-10-17 | 2001-06-11 | ゴムクローラ製造方法 |
AU2001262735A AU2001262735A1 (en) | 2000-10-17 | 2001-06-11 | Rubber crawler producing method |
US10/275,723 US6767493B2 (en) | 2000-10-17 | 2001-06-11 | Rubber crawler producing method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000316558 | 2000-10-17 | ||
JP2000-316558 | 2000-10-17 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/275,723 A-371-Of-International US6767493B2 (en) | 2000-10-17 | 2001-06-11 | Rubber crawler producing method |
US10/396,808 Continuation-In-Part US6818167B2 (en) | 2000-10-17 | 2003-03-26 | Method of manufacturing rubber crawler |
Publications (1)
Publication Number | Publication Date |
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WO2002032640A1 true WO2002032640A1 (fr) | 2002-04-25 |
Family
ID=18795486
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/004890 WO2002032640A1 (fr) | 2000-10-17 | 2001-06-11 | Procede de fabrication de chenilles en caoutchouc |
Country Status (5)
Country | Link |
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US (1) | US6767493B2 (ja) |
JP (1) | JP4159871B2 (ja) |
CN (1) | CN100400259C (ja) |
AU (1) | AU2001262735A1 (ja) |
WO (1) | WO2002032640A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009137307A (ja) * | 2004-03-03 | 2009-06-25 | Sumitomo Rubber Ind Ltd | 弾性履帯の製造方法及びこれを用いた加硫成形装置 |
JP2012101411A (ja) * | 2010-11-09 | 2012-05-31 | Sumitomo Rubber Ind Ltd | 加硫成形装置 |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
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US20060276859A1 (en) * | 2005-06-02 | 2006-12-07 | Searete Llc, A Limited Liability Corporation Of The State Of Delaware | Photopatterning of skin |
KR100652228B1 (ko) * | 2005-07-09 | 2006-11-30 | 스미토모 고무 고교 가부시키가이샤 | 탄성캐터필러의 제조방법 및 이것을 이용한 가황성형장치 |
JP5603385B2 (ja) * | 2012-08-10 | 2014-10-08 | 住友ゴム工業株式会社 | 弾性クローラの製造方法および弾性クローラ製造用の加硫成形金型 |
CN102785306B (zh) * | 2012-08-27 | 2016-04-27 | 镇江同立橡胶有限公司 | 一种压注式无接头橡胶履带一次成型硫化模具 |
CN104129086B (zh) * | 2014-07-08 | 2016-04-13 | 广东特固力士工业皮带有限公司 | 一种热塑性弹性体输送带平板塑化机 |
JP6702663B2 (ja) * | 2015-06-24 | 2020-06-03 | 株式会社ブリヂストン | ゴムクローラの製造方法 |
CN107434896B (zh) * | 2017-08-29 | 2020-10-09 | 高科橡塑工业有限公司 | 模压无痕氟橡胶硫化胶条及其制备方法 |
JP7241561B2 (ja) * | 2019-02-12 | 2023-03-17 | Nok株式会社 | 長尺体の製造方法 |
CN110919953A (zh) * | 2019-12-17 | 2020-03-27 | 德科摩橡塑科技(东莞)有限公司 | 一种橡胶履带硫化成型工艺及橡胶履带硫化成型机 |
CN113696459B (zh) * | 2021-08-25 | 2023-05-12 | 宁波慈光同步带有限公司 | 一种双面齿同步带的加工装置及其加工方法 |
CN115320144B (zh) * | 2022-08-16 | 2023-09-19 | 无锡市盛捷浠尔自动化设备有限公司 | 一种环形履带成型机 |
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US5536464A (en) * | 1994-11-15 | 1996-07-16 | Bridgestone/Firestone, Inc. | Apparatus and method for curing endless rubber track |
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EP0308550B1 (en) * | 1987-09-21 | 1993-04-07 | Mitsuboshi Belting Ltd. | Method of fabricating a double toothed belt |
JP4264172B2 (ja) | 1999-04-23 | 2009-05-13 | 株式会社ブリヂストン | ゴムクローラ製造方法 |
-
2001
- 2001-06-11 JP JP2002535862A patent/JP4159871B2/ja not_active Expired - Fee Related
- 2001-06-11 AU AU2001262735A patent/AU2001262735A1/en not_active Abandoned
- 2001-06-11 WO PCT/JP2001/004890 patent/WO2002032640A1/ja active Application Filing
- 2001-06-11 CN CNB01817339XA patent/CN100400259C/zh not_active Expired - Fee Related
- 2001-06-11 US US10/275,723 patent/US6767493B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5536464A (en) * | 1994-11-15 | 1996-07-16 | Bridgestone/Firestone, Inc. | Apparatus and method for curing endless rubber track |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009137307A (ja) * | 2004-03-03 | 2009-06-25 | Sumitomo Rubber Ind Ltd | 弾性履帯の製造方法及びこれを用いた加硫成形装置 |
JP4517002B2 (ja) * | 2004-03-03 | 2010-08-04 | 住友ゴム工業株式会社 | 弾性履帯の製造方法及びこれを用いた加硫成形装置 |
JP2012101411A (ja) * | 2010-11-09 | 2012-05-31 | Sumitomo Rubber Ind Ltd | 加硫成形装置 |
Also Published As
Publication number | Publication date |
---|---|
AU2001262735A1 (en) | 2002-04-29 |
US6767493B2 (en) | 2004-07-27 |
JP4159871B2 (ja) | 2008-10-01 |
US20030141630A1 (en) | 2003-07-31 |
CN1469799A (zh) | 2004-01-21 |
CN100400259C (zh) | 2008-07-09 |
JPWO2002032640A1 (ja) | 2004-02-26 |
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