Parison lubrication method

Details Parison lubrication method Parison lubrication method

1990-06-11

1991-11-26

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264130, 264134, 264513, 425 90, 425 93, 425522, 425DIG115, 427256, 427428, 427429, 4274301, B29C 4900, B29C 4920

Patent

active

050680781

ABSTRACT:
A method for enhancing the uniformity of wall thickness of an article having a high aspect ratio horizontal cross section and produced from a parison in a blow molding process whereby a barrier layer is applied to a selected area of the outer surface of each parison prior to its introduction into the blow molding apparatus, the barrier layer being effective to prevent premature freezing of the blown parison upon contact with a wall of the blow molding apparatus. The barrier layer application apparatus includes a generally contoured pad coupled to a supply of the barrier material, the pad being situated to contact a selected portion of each parison prior to its introduction into the blow molding apparatus.

REFERENCES:
patent: 1662086 (1928-03-01), Stuhr
patent: 4478889 (1984-10-01), Maruhashi et al.
patent: 4499045 (1985-02-01), Obsomer
patent: 4525377 (1985-06-01), Nickel et al.
patent: 4534995 (1985-08-01), Pocock et al.
patent: 4543277 (1985-09-01), Giles
patent: 4550008 (1985-10-01), Shimizo

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