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
1979-11-26
1982-02-16
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...
264526, 264530, 264531, 264532, 264542, 264312, 425526, 425530, B29C 1707
Patent
active
043158889
ABSTRACT:
A method and apparatus are disclosed for forming blown thermoplastic articles in which an extrusion head extrudes an essentially tubular parison of thermoplastic material. Sections of a preform mold are then closed around the parison, the sections having a preform cavity with a configuration such that one end of the parison is open after closing and the other end is enclosed. A core pin is next inserted into the open end of the parison and is utilized to compression mold the parison to form a preform. Heat is transferred from the parison through the inner and outer walls of the preform between the mold cavity and core pin during the compression molding step in order to thermally condition the preform and being the temperature within the desired range. The sections of the preform mold are then opened and the preform is enclosed within sections of blow molds within a blow mold cavity. The preform is next expanded to the shape of the blow mold cavity. This process may be continuously repeated by means of multifunction mold halves.
REFERENCES:
patent: Re29045 (1976-11-01), Uhlig
patent: 3288898 (1966-11-01), West
patent: 3307726 (1967-03-01), Cleereman
patent: 3356242 (1967-12-01), Cleereman
patent: 3375553 (1968-04-01), Criss
patent: 3488804 (1970-01-01), Butcher
patent: 3754851 (1973-08-01), Reilly et al.
patent: 3767747 (1973-10-01), Uhlig
patent: 3806300 (1974-04-01), Hafele et al.
patent: 3940225 (1976-02-01), Uhlig
patent: 3941542 (1976-03-01), Uhlig
patent: 3949033 (1976-04-01), Uhlig
patent: 3995763 (1976-12-01), Ayres et al.
patent: 4004872 (1977-01-01), Krall et al.
patent: 4049761 (1977-09-01), Lorge et al.
patent: 4115494 (1978-09-01), Valyi
patent: 4122138 (1978-10-01), Cleereman et al.
patent: 4147748 (1979-04-01), Saumsiegle
LandOfFree
Method for forming a blown thermoplastic article does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for forming a blown thermoplastic article, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for forming a blown thermoplastic article will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-942431