Material pipe assembly special for polyvinyl chloride

The invention relates to a material pipe assembly special for polyvinyl chloride. The material pipe assembly comprises a heating ring, a material pipe outer sleeve, an air passage, thermocouples, a material pipe inner sleeve, a air valve and air passage ports, wherein the material pipe outer sleeve...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LI XIAOJING, HUANG TURONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 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:	The invention relates to a material pipe assembly special for polyvinyl chloride. The material pipe assembly comprises a heating ring, a material pipe outer sleeve, an air passage, thermocouples, a material pipe inner sleeve, a air valve and air passage ports, wherein the material pipe outer sleeve and the air passage are fixedly cooperated with the material pipe inner sleeve. The invention is characterized in that during the production of the polyvinyl chloride products, when the thermocouples detect a too high temperature of the material pipe inner sleeve, a switch is opened through the valve, external gas sources can send cool air into the air passage through the air passage ports, heating of the heating ring is reduced or suspended at the same time, and the air passage is communicated with the air passage ports, wherein one end of the air passage ports conveys the cool air, and the other end of the air passage ports exhausts hot air, thereby effectively reducing the temperature of the material pipe assemb