Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to heat or cool
Patent
1997-02-28
1998-12-01
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, 425572, B29C 4520
Patent
active
058434950
ABSTRACT:
A hot nozzle for use with a side-gate runnerless injection molding system includes a base portion and a nozzle portion adapted to be inserted into a nozzle hole formed in a mold. The base portion and the nozzle portion are formed by a tubular body made of a conductive metal having a predetermined electrical resistance. The tubular body has outlet holes formed in a front part of the nozzle portion and opened in a lateral side thereof. At least one pair of longitudinal slits extend substantially over the length of the tubular body in an axial direction thereof except at least the front part of the nozzle portion to divide said body into at least two sections. Each of the sections includes a device for connection to a source of electric power, so that the tubular body is heated mainly at the front part of the nozzle portion when electric power is applied between two sections of the tubular body divided by the slits. Each of the slits has a front portion including a pair of bifurcated parts. Each of the bifurcated parts includes a front end positioned adjacent corresponding one of the outlet holes.
REFERENCES:
patent: 4212624 (1980-07-01), Ando et al.
patent: 4648833 (1987-03-01), Yamada
patent: 5435711 (1995-07-01), Yamada
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