Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1975-01-31
1976-08-03
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
264 89, 264 97, B29C 1707
Patent
active
039729761
ABSTRACT:
This injection blow molding method has special provision for maintaining the plastic of a parison on a core rod at the orientation temperature of the plastic; and stretching the plastic of the parison lengthwise of the core rod for orientation in the direction of one axis without any substantial increase in the diameter of the parison. After this orientation in one axis, the temperature is controlled to maintain an orientation temperature, and the plastic of the parison is then blown to a larger diameter so as to obtain orientation in another axis for "bi-axial orientation". The core rod is covered by an elastic balloon, and provision is made for obtaining flow of the plastic on the core rod lengthwise of the rod during the first orientation operation.
REFERENCES:
patent: 3032823 (1962-05-01), Sherman
patent: 3305158 (1967-02-01), Whiteford
patent: 3311684 (1967-03-01), Heider
patent: 3470282 (1969-09-01), Scalora
patent: 3607998 (1971-09-01), Goodridge
patent: 3776991 (1973-12-01), Marcus
patent: 3868206 (1975-02-01), Erlandson et al.
Farrell Patent Company
Feldman Marvin
Silbaugh Jan H.
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