Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to heat or cool
Patent
1978-08-10
1980-01-22
Pavelko, Thomas P.
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means to heat or cool
249144, 425577, B29F 100
Patent
active
041848349
ABSTRACT:
An injection molding apparatus, including a mold having a mold cavity therein defining the outer periphery of a pipe fitting, has a core pin assembly adapted to be positioned in the cavity and which comprises opposing distal core sections whose proximal ends abut an intermediate core section therebetween. The core sections are mutually separable and have passages for accommodating a fluid coolant therein, and when the core sections are assembled, at least certain passages in either or both distal core sections are in fluid intercommunicating relation with passages in the intermediate core section. Means is provided for circulating fluid coolant through passages in all the core sections and comprises pump means for pumping fluid coolant at a predetermined pressure through the intercommunicating passages and for concurrently withdrawing the coolant therefrom at a suction pressure greater than the predetermined pressure to prevent leakage of the coolant from the intercommunicating passages outwardly between the abutting proximal ends of the corresponding core sections and into the mold cavity.
REFERENCES:
patent: 2828509 (1958-04-01), Smucker
patent: 3752436 (1973-08-01), Deutsch
Charlotte Pipe and Foundry Company
Pavelko Thomas P.
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