Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to heat or cool
Patent
1997-11-26
2000-02-08
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
060222107
ABSTRACT:
A hot runner nozzle structure provides insulation to reduce heat transfer to a utilizing tool and to increase accuracy of temperature measurement and control. A shaft foot of extremely low heat conductivity is used to separate a point of contact between a feed tube shaft and the tool. The shaft foot may be formed of titanium for example. An insulating cap of extremely low heat conductivity is surrounds the shaft foot in the vicinity of the nozzle tip. The cap may be formed of PEEK or of titanium for example. Gaps may be provided between the insulating cap and shaft foot and between the shaft foot and feed tube shaft. In an alternate embodiment having smaller dimensions, an insulating ring is provided at the end of the feed tube shaft. The structure, combined with a positioning sleeve surrounding the feed tube shaft, permits placing a heat sensor much closer to the nozzle tip in order to obtain more accurate temperature measurements.
REFERENCES:
patent: 3091812 (1963-06-01), Witkowski
patent: 4586887 (1986-05-01), Gellert
patent: 4622001 (1986-11-01), Bright et al.
patent: 4663811 (1987-05-01), Gellert
patent: 5346388 (1994-09-01), Gellert
patent: 5569475 (1996-10-01), Adas et al.
patent: 5665397 (1997-09-01), Fisher et al.
CRC Handbook of Chemistry and Physics, pp. E-11 through E-14, 1982-83.
Gunther Heisskanaltechnik GmbH
Heitbrink Tim
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