Injection molding nozzle heater clamp

Details Injection molding nozzle heater clamp Injection molding nozzle heater clamp

1994-06-27

1996-09-24

Warden, Robert

Plastic article or earthenware shaping or treating: apparatus

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

With means to heat or cool

26432815, 425DIG245, B29C 4523

Patent

active

055588883

ABSTRACT:
A clamp for clamping heater assemblies onto cylindrical bodies such as injection molding nozzles that require heating. The clamp includes a mandrel that slips over the nozzle, and has a heater wound on the exterior. The mandrel has a longitudinal slit that will permit the bore of the mandrel to be reduced in size when a lateral width of the slit is reduced. The mandrel carries outwardly facing cam surfaces, and an overlying sleeve has inwardly facing cam surfaces which mate, and upon relative longitudinal movement, the cam surfaces cause the lateral width of the slit to reduce and clamp the mandrel onto the nozzle. The clamping can be effected by differential movement due to differences in thermal expansion of the mandrel and the sleeve, or by mechanical movement of the sleeve relative to the mandrel to obtain the cam action.

REFERENCES:
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patent: 2820133 (1958-01-01), Norton
patent: 3244236 (1966-04-01), Langham
patent: 4268241 (1981-05-01), Rees et al.
patent: 4613296 (1986-09-01), Nagasaka
patent: 4875845 (1989-10-01), Hara et al.
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patent: 4968247 (1990-01-01), Olson
patent: 5113576 (1992-05-01), van Boekel et al.
patent: 5267375 (1993-12-01), Lasmar
patent: 5360333 (1994-11-01), Schmidt
"Band and Nozzle Heaters" brochure pp. 53-60 Watlow Electric Heater Manufacturing Company, St. Louis, Missouri, Publication date unknown.

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