Multiple station, multiple clamp assembly rotary blow molding ma

Details Multiple station, multiple clamp assembly rotary blow molding ma Multiple station, multiple clamp assembly rotary blow molding ma

1985-04-09

1986-05-20

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

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

Plural female molds and means to shape parison at each...

425541, B29C 1707, B29C 1712, B29D 2303

Patent

active

045898383

ABSTRACT:
Improvements in the mold opening and closing actuator mechanism in a multiple station, multiple clamp assembly rotary blow molding machine for the manufacture of plastic bottles and the like and improvements in the automatic unloader mechanism for the machine. In a rotary machine having an even number of stations and clamp assemblies rotatably indexable from station to station, the clamp assemblies are closed and opened by rotatable cranks and toggle mechanisms. Adjacent clamp assemblies are opened and closed by rotating the respective cranks in opposite directions for either the closing or the opening movements of the clamp assemblies. Rotary actuators at the mold closing and mold opening stations rotate 180.degree. to actuate the clamp assemblies. By providing the above opposite rotational actuation of adjacent clamp assemblies the need to reverse or retract the rotary actuators during indexing of the clamp assemblies is eliminated as is the time required to reverse or retract. The clamp assemblies can thereby be more quickly indexed from station to station. The unloader mechanism at the mold opening station is mechanically driven from the rotary indexable table drive of the machine thereby providing positive mechanical timing for the unloader to grasp the part and lift the part from the mold as the mold halves separate. The mechanical drive includes a crank drive for vertical motion of the unloader and a rotary indexable drive for movement of the part from the mold opening station to a nearby conveyor.

REFERENCES:
patent: 3496600 (1970-02-01), Heston
patent: 3854855 (1974-12-01), Pollock et al.
patent: 3954370 (1976-05-01), Pollock et al.
patent: 3964852 (1976-06-01), Marfiewicz
patent: 4439127 (1984-03-01), Frohn

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