Apparatus for longitudinal stretch for blow molding

Details Apparatus for longitudinal stretch for blow molding Apparatus for longitudinal stretch for blow molding

1975-01-31

1977-02-01

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

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

By fluid pressure actuated flexible diaphragm

425DIG208, 425DIG209, 425DIG216, B29C 1707

Patent

active

040059693

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:
patent: 720718 (1903-02-01), Maddock et al.
patent: 3032823 (1962-05-01), Sherman
patent: 3305890 (1967-02-01), Senior et al.
patent: 3439380 (1969-04-01), Seefluth
patent: 3651180 (1972-03-01), Glueckert
patent: 3776991 (1973-12-01), Marcus
patent: 3781395 (1973-12-01), Uhlig
patent: 3865530 (1975-02-01), Jesselallee et al.

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