Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including application of internal fluid pressure to hollow...
Patent
1981-04-30
1983-08-02
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...
264531, 425525, 425535, B29C 1707
Patent
active
043965741
ABSTRACT:
The disclosure relates to a method and apparatus for blow moulding hollow plastic articles each having at an end thereof, a main opening and a secondary opening defined by an angled passageway. The method includes the step of laterally stretching a tubular parison from which the article is to be moulded so as to receive a primary mandrel for forming said opening and a secondary mandrel for forming the passageway. Air is introduced into the parison through the secondary mandrel to form the inner end portion of the passageway while the parison is expanded to conform to the shape of the mould.
REFERENCES:
patent: 3100317 (1963-08-01), Perry
patent: 3538543 (1970-11-01), Nataf
patent: 3724987 (1973-04-01), Schiemann
patent: 4118452 (1978-10-01), Myers et al.
Silbaugh Jan H.
Supreme Casting & Tooling
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