Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling rate of movement of molding material or its...
Patent
1989-10-27
1991-12-10
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling rate of movement of molding material or its...
264515, 264167, 264173, 4251331, 425149, 425166, 425170, 425381, 425462, 425532, B29C 4792
Patent
active
050716042
ABSTRACT:
A multi-layer parison has a plurality of layers of main and auxiliary resins laminated with each other. An apparatus for forming the multi-layer parison includes a main resin extruding mechanism, at least one auxiliary resin extruding mechanism and a control unit for controlling the main and auxiliary resin extruding mechanisms so that the pressure for extruding the auxiliary resin is immediately increased and the pressure for extruding the main resin is gradually increased at the beginning of extrusion of the main and auxiliary resins.
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Fukuhara Keiji
Tsujikura Takashi
Mazda Motor Corporation
The Japan Steel Works
Thurlow Jeffery
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