Process for the production of oriented hollow plastic bodies

Details Process for the production of oriented hollow plastic bodies Process for the production of oriented hollow plastic bodies

1978-02-06

1980-04-01

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, 264535, 425529, 425535, B29C 1707

Patent

active

041961650

ABSTRACT:
Production of oriented hollow plastic bodies having a more uniform wall thickness by formation of elongated preforms of which one end is closed and the other is open and has a molded neck, heat conditioning of the preforms at a temperature which allows the plastic to be oriented by stretching, introduction of the preforms into blow molds the cavities of which have a greater length than the length of the preforms and reproduce the shape of the desired hollow bodies and blowing of the preforms by introducing an expansion fluid into the preforms through their open end in which the expansion fluid is introduced into the preforms towards their bottom along a direction substantially parallel to their longitudinal axis and at a distance from their bottom which is between 20 and 60% of their length which is subjected to expansion.

REFERENCES:
patent: 3164646 (1965-01-01), Fischer
patent: 3202739 (1965-08-01), Zavasnik
patent: 3371376 (1968-03-01), Fischer et al.
patent: 3412188 (1968-11-01), Seefluth
patent: 3470282 (1969-09-01), Scalora
patent: 3754851 (1973-08-01), Reilly et al.
patent: 3865530 (1975-02-01), Jessevallee et al.
patent: 3900120 (1975-08-01), Sincock

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