Double-layer plastic pipe extrusion device

A double-layer plastic pipe extrusion device comprises an extrusion barrel, a first extrusion screw, a second extrusion screw, a blocking ring body and a sealing ring body, the second extrusion screw is arranged in the extrusion barrel and comprises a second extrusion shaft and a second screw blade,...

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Bibliographische Detailangaben
1. Verfasser:	DUAN JUPING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES 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:	A double-layer plastic pipe extrusion device comprises an extrusion barrel, a first extrusion screw, a second extrusion screw, a blocking ring body and a sealing ring body, the second extrusion screw is arranged in the extrusion barrel and comprises a second extrusion shaft and a second screw blade, the second extrusion shaft comprises a feeding section and an extrusion section, and the feeding section and the extrusion section are connected through a first screw blade and a second screw blade. The second spiral blade is arranged on the extrusion section of the second extrusion shaft, the blocking ring body is arranged on the feeding section of the second extrusion shaft, the sealing ring body is arranged on the feeding section of the second extrusion shaft, the sealing ring body is arranged between the inner wall of the extrusion barrel and the outer wall of the second extrusion shaft, and the section of the sealing ring body is triangular. Due to the fact that the sealing ring body is arranged in the extrus