Process for heating a blow molding preform

Details Process for heating a blow molding preform Process for heating a blow molding preform

1992-07-14

1994-05-17

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264521, 264535, B29C 3508, B29C 4964

Patent

active

053125720

ABSTRACT:
A preform of a thermoplastic material, especially a material which is orientable during blow forming, has an opening region, a closed bottom as well as walls connecting the bottom with the opening region. In the region of at least a part of the surface demarcating the preform a texturing enlarging the surface is provided, which has a low profile depth relative to the wall thickness of the preform. A process for heating a preform of a thermoplastic material is also disclosed which includes texturing a portion of the surface of the preform to enlarge the surface area thereof whereby the time required to heat the preform to a desired temperature suitable for blow molding is reduced. The preform is also rotated as it is moved past a heating device and the heating device is controlled such that the heating device combination with the texturing provides a desired temperature profile rendering the preform suitable for blow molding.

REFERENCES:
patent: 3689346 (1972-09-01), Rowland
patent: 3865912 (1975-02-01), Rosenkranz et al.
patent: 4076071 (1978-02-01), Rosenkranz et al.
patent: 4079104 (1978-03-01), Dickson et al.
patent: 4153667 (1979-05-01), Brady et al.
patent: 4606723 (1986-08-01), Pasternicki
patent: 4997692 (1991-03-01), Yoshino
patent: 5124110 (1992-06-01), Yokobayashi
Patent Abstract of Japan, vol. 7, No. 71 (M-202) (1216) Mar. 24, 1983 & JP-A-57-212031 (Asahi Kasei Kogyo K.K.) Dec. 27, 1982.

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