Process for manufacture of hollow bodies

Details Process for manufacture of hollow bodies Process for manufacture of hollow bodies

1978-05-02

1980-12-23

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

264532, 425530, 425534, B29C 1707

Patent

active

042410088

ABSTRACT:
Process for making transparent hollow bodies of terephthalate of polyethyleneglycol in which a preform is made, the preform is cooled rapidly to a temperature at least equal to the crystallization temperature, and is then rapidly expanded to obtain bi-orientation and solidification prior to substantial crystallization of the material. The preform can also be axially stretched during the operation. The apparatus for preforming the process includes a rotatable turret with mandrels, which operates to slightly expand the material on a mandrel.

REFERENCES:
patent: 3966378 (1976-06-01), Valyi
patent: 4065246 (1977-12-01), Marcus
patent: 4108937 (1978-08-01), Martineu et al.

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