Injection mold having cooling fins

Details Injection mold having cooling fins Injection mold having cooling fins

1989-08-28

1990-10-30

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

With means to heat or cool

249 79, 249111, 26432816, B29C 4573

Patent

active

049665448

ABSTRACT:
An injection mold for injection-molding a tubular article having a bottom at one end and opening at the other end having a cavity plate and a core which define a cavity conforming to the shape of the article when closed. A gate opens to the cavity at a portion defining the bottom of the article. The core is provided with a coolant passage for circulating coolant up to a portion near the free end surface of the core for defining the bottom of the article. The inner surface of the core defining the end portion of the coolant passage near the free end surface of the core tapering toward the gate and the coolant passage extends near a portion of the free end surface of the core opposed to the gate, and at least one rib is provided on the inner surface of the core at the tapering portion to project into the coolant passage and to extend in parallel to the direction of coolant flow.

REFERENCES:
patent: 2770011 (1956-11-01), Kelly
patent: 4208177 (1980-06-01), Allen
patent: 4622001 (1986-11-01), Bright et al.
patent: 4764103 (1988-08-01), Mitake

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