Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Differential temperature conditioning
Patent
1982-12-23
1985-07-23
Silbaugh, Jan
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Differential temperature conditioning
264532, 264533, 264291, B29C 1707, B29C 1700
Patent
active
045308110
ABSTRACT:
A process of producing a tubular pre-moulding of a thermoplastic material, suitable for subsequent shaping to form containers by a rolling process. The material in a part of a tube is axially oriented as a result of reducing the wall thickness by applying an external pressure which causes the material to flow. The oriented material is moulded by a blow-moulding process into future mouth parts and parts of adjacent neck sections, preferably from two blank parts, joined to one another, of pre-mouldings, the blank parts in the transition between the two mouth parts being severed in order to form two separate blank parts, so that, after closing one end and, if necessary, reworking in order to obtain the requisite closing faces at the other end, the two blank parts each form a tubular pre-moulding.
REFERENCES:
patent: 4108937 (1978-08-01), Martineu et al.
patent: 4297306 (1981-10-01), Yoshino et al.
patent: 4380525 (1983-04-01), Jacobsen et al.
patent: 4397808 (1983-08-01), Yoshino et al.
patent: 4405546 (1983-09-01), Jacobsen et al.
Jakobsen Kjell M.
Nilsson Claes T.
PLM Aktiebolag
Silbaugh Jan
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