Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including application of internal fluid pressure to hollow...
Patent
1994-08-22
1996-10-15
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Including application of internal fluid pressure to hollow...
264529, 425536, B29C 4918, B29C 4960
Patent
active
055651658
ABSTRACT:
In a blow molding process, a fused thermoplastic polymer parison is interposed between a pair of split molds. The split molds are closed around the parison to seal the ends. A small diameter hollow needle is inserted through one of the split molds and fluid is blown into the parison forming a balloon. After the balloon begins to form, a large diameter hollow needle is inserted while internal pressure is applied to the parison via the small diameter hollow needle, and a large amount of fluid is blown in. This process is highly productive and reduces the conventional blow molding cycle by 60 percent due to the rapid cooling of the hollow article.
REFERENCES:
patent: 3089185 (1963-05-01), Di Settenbrini
patent: 3114931 (1963-12-01), Pelikan
patent: 3338998 (1967-08-01), Di Settembrini
patent: 3450805 (1969-06-01), Chesser
patent: 3492106 (1970-01-01), Peters et al.
patent: 3592886 (1971-07-01), Havely
patent: 4025276 (1977-05-01), Peters
patent: 4092389 (1978-05-01), Sakurai
Morrison Thomas R.
Pastel Christopher R.
Timm Catherine
Toyo Seikan Kaisha Ltd.
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