Metering device for an injection molding unit

Details Metering device for an injection molding unit Metering device for an injection molding unit

2006-03-21

2006-03-21

Heitbrink, Tim (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With accumulator, trap chamber, or serially arranged valves...

C425S560000, C425S561000, C425S562000, C425S564000

Reexamination Certificate

active

07014454

ABSTRACT:
A metering device for an injection molding unit includes a base body having an antechamber in fluid communication with a feed channel for introduction of plastic material, and a metering chamber in fluid communication with a injection channel. The antechamber and the metering chamber are connectable with one another by a closeable passageway. Movably arranged in the base body between the antechamber and the metering chamber is a displacement member in the form of a piston to separate the antechamber and the metering chamber. The piston has a first end face which demarcates the antechamber and a second end face which demarcates the metering chamber, with the first end face defining an effective area which is smaller than an effective area of the second end face.

REFERENCES:
patent: 3160331 (1964-12-01), Trumbull et al.
patent: 3390433 (1968-07-01), Barnett et al.
patent: 3841813 (1974-10-01), Stanciu
patent: 461 789 (1968-08-01), None
patent: 1 849 055 (1962-03-01), None
patent: 1 428 521 (1964-11-01), None

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