Injection mold probe and runnerless injection mold

Details Injection mold probe and runnerless injection mold Injection mold probe and runnerless injection mold

1994-02-15

1995-10-10

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

With means to heat or cool

26432815, B29C 4520

Patent

active

054565928

ABSTRACT:
An injection mold probe and a runnerless injection mold, in which the injection mold has a tip heater for intermittently heating a tip portion of the probe and a body heater for heating a body portion of the probe. The heaters being furnished with power from a single power source. The injection mold probe has its tip portion provided with a tip heater, which is made of platinum or a platinum alloy with the electric resistance thereof increased quickly with temperature increase caused by energization and its body portion provided with a body heater, which is made from a nicrome wire with the electric resistance thereof less increased with temperature increased caused by energization, the tip and body heaters being connected in series. The probe is mounted in a runner portion of a die with its tip portion disposed near a gate portion of the die. The runnerless injection mold comprises a power source unit for controlling power in synchronism to a molding process to serially supply power to the tip and body heaters.

REFERENCES:
patent: 4230934 (1980-10-01), ter Beek et al.
patent: 4516927 (1985-05-01), Yoshida
patent: 4913912 (1990-04-01), Leverenz
patent: 5238391 (1993-08-01), Teng

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