Apparatus for producing pipes or hoses from thermoplastic material

An apparatus for producing pipes or hoses from a hollow strand of thermoplastic material, comprising a film blowing die, which has at least one connected extruder, feeding in the polymer material, and at least one mandrel, arranged in the barrel of the said extruder, there being formed at least betw...

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Bibliographische Detailangaben
1. Verfasser:	DOEHMEN, WILLI
Format:	Patent
Sprache:	eng ; fre ; ger
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:	An apparatus for producing pipes or hoses from a hollow strand of thermoplastic material, comprising a film blowing die, which has at least one connected extruder, feeding in the polymer material, and at least one mandrel, arranged in the barrel of the said extruder, there being formed at least between the mandrel and the barrel a flow space for the hollow strand, to which space the polymer material is fed via at least one heart-shaped groove, permits a more uniform distribution of the material and consequently improved hollow strands if the run-out regions (19,20) of the channel branches (15,16) of the heart-shaped-groove distributor overlap one another in the manner of a spiral mandrel distributor.