Thick film heater for injection mold runner nozzle
AssigneeWatlow Electric Manufacturing Company
InventorsRoly Juliano, Christopher C. Lanham, Louis P. Steinhauser
Life of this patent
Estimating the term…
Abstract
Hot runner injection molding systems with externally heated injection runner nozzles for such systems. The heater is preferably a tubular heater with the resistive element applied to the exterior surface by fine film printing. The heater is adapted to externally heat a hot runner injection mold runner nozzle.
Claims28
In an injection mold runner nozzle having a substrate surface, a heater comprising:
- a) a fine film printed dielectric layer applied on said substrate surface;
- b) a fine film printed resistive element layer applied on said dielectric layer;
- c) a fine film printed terminal contact applied in electrical contact with said resistive element for electrical connection to a power source;
- and
- d) an over glaze layer printed on said resistive element layer.
The method of heating comprising the steps of:
- (a) precision fine film printing a dielectric layer on an exterior substrate heating surface of a runner nozzle;
- (b) precision fine film printing a resistive element layer on said dielectric layer;
- (c) precision fine film printing terminal contacts in electrical communication with said resistive element;
- (d) precision fine film printing of a protective over glaze on said resistive element layer;
- and
- (e) electrically powering said terminal contact.
A heater comprising:
- an exterior substrate surface of an injection mold runner nozzle;
- a dielectric layer applied on said substrate surface by precision fine film printing;
- a resistive element layer applied on said dielectric layer by precision fine film printing;
- a terminal trace for electrical contact to a power source in electrical contact with said resistive element applied by precision fine film printing;
- and
- an over glaze layer applied on said resistive element layer by printing.
An injection mold runner nozzle body having an exterior substrate surface comprising:
- a) a fine film dielectric layer printed on said substrate surface;
- b) a fine film resistive element layer printed on said dielectric layer for heating;
- c) a fine film terminal contact printed in electrical contact with said resistive element for electrical connection to a power source;
- and
- d) an over glaze layer printed on said resistive element layer.
An injection mold runner nozzle having a co-axially disposed cylindrical sleeve with an exterior substrate surface comprising:
- a) a fine film dielectric layer printed on said substrate surface;
- b) a fine film resistive element layer printed on the dielectric layer for heating;
- c) a fine film terminal contact printed in electrical contact with said resistive element for electrical connection to a power source;
- and
- d) an over glaze layer printed on the resistive element layer.
Dependencies are inferred from the claim text.