CONTINUOUS VULCANIZATION METHOD OF RUBBER PRODUCT WITH HOLLOW PART

PROBLEM TO BE SOLVED: To provide a continuous vulcanization method with which a rubber product with a hollow part is continuously vulcanized with vulcanization speed nearly equal to extrusion speed, while retaining the shape of the product even when the unvulcanized rubber product with the hollow pa...

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Bibliographische Detailangaben
Hauptverfasser:	KUBOTA TAKUMI, SHIKAYAMA KOTARO, AOYAMA HIROMITSU, TSUDA TAKEO, FUKUDA KOJI, NORO SHOHEI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a continuous vulcanization method with which a rubber product with a hollow part is continuously vulcanized with vulcanization speed nearly equal to extrusion speed, while retaining the shape of the product even when the unvulcanized rubber product with the hollow part to be extrusion molded is long and has a large cross-sectional shape.SOLUTION: An unvulcanized rubber product C with a hollow part c to be molded with continuous extrusion, having a liquid heat medium injected into the hollow part, is sent to, and immersed in, a liquid vulcanization tank 3 in which the liquid heat medium 5, consisting of one liquid or a plurality of liquids with specific gravity less than that of the unvulcanized rubber product, is heated and stored, and vulcanized under normal pressure. The unvulcanized rubber product is continuously vulcanized by retaining the liquid heat medium in the hollow part and maintaining an immersed state in the liquid heat medium 5 without being floated with buoyancy, and uniformly heating the product, while retaining the shape, in accordance with extrusion speed under normal pressure.