Injection molding method for multi-layer bottomed parisons
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United States of America Patent
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Aug 25, 1992
Issued Date -
N/A
app pub date -
Sep 8, 1987
filing date -
Jul 31, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An injection molding method for a multi-layer bottomed parison comprising: using a triple nozzle concentrically comprising a first flowpassage in communication with a nozzle hole, a second flowpassage and a third flowpassage respectively opening to a distal end of the first flowpassage in the inside of the nozzle hole, forming an inner layer and an outer layer of a bottomed parison with a resin from the first flowpassage, and forming a bottomed parison having a five-layer or a four-layer in section comprising an intermediate layer and a center layer or two intermediate layers with resins from the second flowpassage and the third flowpassage.
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