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    • 2. 发明授权
    • EXTRUSIONSKOPF
    • EP1089864B1
    • 2002-07-31
    • EP00922636.6
    • 2000-04-14
    • MAUSER-WERKE GmbH & Co. KG
    • LANGOS, PeterLEHMANN, ManfredKEUSCH, Stefan
    • B29C47/20
    • B29C47/54B29C47/0023B29C47/0054B29C47/20
    • The invention relates to an extrusion head (10) for a blow molding machine for producing two-layer synthetic hollow bodies. Said blow molding machine comprises one or more extruders for feeding molten synthetic material which extruders are connected to the housing (12) of the extrusion head. The aim of the invention is to make sure that, if different synthetic materials of different viscosities are used, both materials have substantially the same rheological flow conditions when they are distributed across the circumference of the die to form a tubular preform. To this end, the expulsion piston consist of two concentric cylinder bushes (16, 18) which define between them an annular gap in which the two distributor organs are located on opposite sides inside on the inner surface of the outer cylinder bush and outside on the outer surface of the inner cylinder bush. The synthetic materials of the two distributor organs that are distributed across the circumference are issued by the expulsion piston (16, 18) into the cavity (22) of the extrusion head (10) approximately in the center of the expulsion piston at the lower end of the annular gap.
    • 4. 发明公开
    • EXTRUSIONSKOPF
    • 挤压头
    • EP1089864A1
    • 2001-04-11
    • EP00922636.6
    • 2000-04-14
    • MAUSER-WERKE GmbH
    • LANGOS, PeterLEHMANN, ManfredKEUSCH, Stefan
    • B29C47/20
    • B29C47/54B29C47/0023B29C47/0054B29C47/20
    • The invention relates to an extrusion head (10) for a blow molding machine for producing two-layer synthetic hollow bodies. Said blow molding machine comprises one or more extruders for feeding molten synthetic material which extruders are connected to the housing (12) of the extrusion head. The aim of the invention is to make sure that, if different synthetic materials of different viscosities are used, both materials have substantially the same rheological flow conditions when they are distributed across the circumference of the die to form a tubular preform. To this end, the expulsion piston consist of two concentric cylinder bushes (16, 18) which define between them an annular gap in which the two distributor organs are located on opposite sides inside on the inner surface of the outer cylinder bush and outside on the outer surface of the inner cylinder bush. The synthetic materials of the two distributor organs that are distributed across the circumference are issued by the expulsion piston (16, 18) into the cavity (22) of the extrusion head (10) approximately in the center of the expulsion piston at the lower end of the annular gap.