MANUFACTURE OF VALVE SEAT

PURPOSE:To obtain a seat ring to which a seal ring is fitted so as not to come off even with no claming ring by a structure wherein elastic material is injected in the metallic seat ring, over the whole periphery in which a groove to fit the elastic seal ring is made, by means of a mold and, after t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SAJI TERUHISA, HASHIMOTO KAZUHARU
Format:	Patent
Sprache:	eng
Schlagworte:	ACTUATING-FLOATS AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BLASTING COCKS DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TAPS THERMAL INSULATION IN GENERAL TRANSPORTING VALVES WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a seat ring to which a seal ring is fitted so as not to come off even with no claming ring by a structure wherein elastic material is injected in the metallic seat ring, over the whole periphery in which a groove to fit the elastic seal ring is made, by means of a mold and, after that, the other mold is separated under the state that the elastic seal ring is fitted to the seat ring. CONSTITUTION:A groove 5 for fitting a rubber seal ring is made in a seat ring 4 in such a form that prevents the seal ring from coming off. Molten rubber is injected from an injection molder in a molding space S for the seal ring formed by the groove 5 and a recess 12 by assembling the seat ring 4 and a mold 10. After the molten rubber in the space S solidifies, only the mold 10 is separated in the state that the seal ring 6 is fitted to the seat ring 4 from the assembly of the seat ring 4 and the mold 10. Thus, the elastic seal ring 6 is surely prevented from coming off without increasing the number of parts.