Opening and closing mechanism for portfolio blowing and blowing-

Details Opening and closing mechanism for portfolio blowing and blowing- Opening and closing mechanism for portfolio blowing and blowing-

1992-09-23

1994-07-05

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

Including means to close or lock blow mold

4254514, B29C 4956

Patent

active

053262506

ABSTRACT:
A mechanism for opening and closing a portfolio blowing or stretching-blowing mold used to manufacture plastic containers. A stationary pin (4) supports two rotating half-molds (3), and two curved control arms (9) are joined at their one ends to the two half-molds on either side of the pin (4). A cam device includes a loose follower roller (16) on a support shaft (16a) parallel to the pin (4), and a guide cam (17) moves the roller perpendicular to (toward and away from) the pin (4). The connection between the roller and the other end of the two arms (9) includes a pair of normally parallel connection rods (13, 14) whose one ends individually support the shaft (16a) and a shaft (10) connecting the other ends of the arms (9), and whose other ends are mounted on a shaft (15) parallel to the shaft (4), the connection rods being oriented transverse to a mold joint plane (M) containing the pin (4) and the shaft (10). The connection rods are coupled by a ball and detent arrangement, which releases in the event of an excessive load.

REFERENCES:
patent: 3599280 (1971-08-01), Rosenkranz et al.
patent: 3608152 (1971-09-01), Fink et al.
patent: 3761212 (1973-09-01), Kontz
patent: 4822275 (1989-04-01), Voss et al.
patent: 4834642 (1989-05-01), Voss et al.
patent: 5064366 (1991-11-01), Voss

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