Process and apparatus for producing a plastic blow-molded part
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United States of America Patent
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-
Dec 3, 2002
Grant Date -
N/A
app pub date -
Oct 23, 2000
filing date -
Oct 22, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for producing a plastic blow-molded part. A plastically deformable plastic parison with a first subregion and an opposite second subregion is placed between a molding element having a projecting region and a mold interacting with the molding element. A positive pressure is generated between the molding element and the first subregion and within the parison, to keep the first subregion at a distance from the molding element and to keep the first and second subregions at a distance from each other. A stretching region of the first subregion is preformed by moving the molding element in relation to an edge region in the direction of the mold and by generating a negative pressure between the projecting region and the stretching region of the first subregion. The subregions are deformed for generating a positive pressure within the parison.
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