Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Shaping against interior of a forming surface by rotation of...
Patent
1980-09-15
1982-12-07
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Shaping against interior of a forming surface by rotation of...
264540, 264542, 425525, 425532, B29C 1707
Patent
active
043626882
ABSTRACT:
A lower mold half is horizontally placed. The top surface of the lower mold half is provided with a first groove of any desired shape, one end of which is closed with the other end having a notch for allowing air to be blown in. An upper mold half has a bottom surface which matches the top surface of the lower mold half and which is provided with a second groove corresponding in shape to said first groove. Thus, when the upper and lower mold halves are brought into contact, there is formed a mold cavity defined by the first and second grooves. A discharging unit including a nozzle for discharging a parison is disposed above the lower mold half and the nozzle is so provided that it can rotate in either direction at a variable speed. At least one of the nozzle and the lower mold half is movably provided to lay a parison in the first groove.
REFERENCES:
patent: 1634160 (1927-06-01), Semple
patent: 2128239 (1938-08-01), Ferngren
patent: 3425092 (1969-02-01), Taga
patent: 3733309 (1973-05-01), Wyeth et al.
patent: 3809521 (1974-05-01), La Fosse
Excell Corporation
Silbaugh Jan H.
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