Apparatus and method for longitudinal stretch for blow molding

Details Apparatus and method for longitudinal stretch for blow molding Apparatus and method for longitudinal stretch for blow molding

1975-01-31

1976-09-21

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Including shaping means comprising fluid pressure contacting...

425389, 425DIG15, 425DIG16, B29D 2303

Patent

active

039816680

ABSTRACT:
This injection blow molding machine 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:
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patent: 2363107 (1944-11-01), Young
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patent: 3321564 (1967-05-01), Dobbins et al.
patent: 3341043 (1967-09-01), Santelli
patent: 3651180 (1972-03-01), Glueckert
patent: 3740180 (1973-06-01), Sidur
patent: 3776991 (1973-12-01), Marcus
patent: 3878282 (1975-04-01), Bonis et al.

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