Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including application of internal fluid pressure to hollow...
Patent
1985-04-30
1987-03-17
Silbaugh, Jan
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Including application of internal fluid pressure to hollow...
264534, 425525, 425530, B29C 4904, B29C 4930
Patent
active
046506276
ABSTRACT:
Expanding the parison while the mold side parts defining the walls of the blow-molding chamber, one part per wall, are moved to mold closed positions causes flash to be pinched between each mold part and provides good wall thickness near the edges of the final product.
REFERENCES:
patent: 3050773 (1962-08-01), Hagen
patent: 3452391 (1969-07-01), Langecker
patent: 3672799 (1972-06-01), Liebertz et al.
patent: 3949034 (1976-04-01), Uhlig
patent: 4086314 (1978-04-01), Lampart et al.
patent: 4129635 (1978-12-01), Yasuike et al.
patent: 4510116 (1985-04-01), Peters et al.
Casperson John R.
Phillips Petroleum Company
Silbaugh Jan
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