Watlow Electric Manufacturing Company

Gunther Heisskanaltechnik Gmbh

Guenther Heisskanaltechnik Gmbh

Frederic Zimmermann

Kevin Ptasienski

Herbert Gunther

Allen Norman Boldt

Elias Russegger

Siegrid Sommer

Kenneth F Fennewald

James McMillin

Gernot Antosch

Christopher C Lanham

Wolfgang Pöschl

Reinhardt W Lehnert

William A McDowell, Iii

Gerhard Schefbänker

Gerhard Schefbanker

Herbert Guenther

Reinhardt Lehnert

Wolfgang Poschl

Allen Boldt

James Mcmillin

William A Mcdowell

Ralf Droessler

A hot runner nozzle having an electrical heating element includes a connector for producing an electrical connection to a connection line, terminal contacts for the heating element terminating in an insulation body for the connector that separates the terminal contacts from one another electrically. The connection line has contact elements that are electrically contactable with the terminal contacts of the heating element. The insulation body is arranged at least in part in a receiving sleeve of the connector, that the connection line may be fixed in or on the receiving sleeve such that the contact elements of the connection line electrically contact the terminal contacts of the heating element, and that a first end of the receiving sleeve that faces towards the heating element wraps around the insulation body and has on this first end two opposing feet that face outward and that are attached to the heating element.

Hot runner nozzle having an electrical heating element

The present invention relates to an electric heater () to heat substantially cylindrical objects (), in particular hot runner nozzles () of hot runner systems, essentially being fitted with at least one cylindrical support and with at least one heating conductor track () deposited on the support (). To reduce premature failure of the heater, the invention stipulates that each heating conductor track () runs substantially in the axial direction (A) of said support (), the heating conductor tracks () being connected to each other by conductor tracks () of lower electrical resistance and each conductor track () running essentially in the tangential direction (T) of the support ().

Electrical heater for heating substantially cylindrical objects

An instrumented heater sleeve is provided that has a plurality of zones, a dielectric layer disposed over an outer surface of the sleeve, a resistive element layer disposed over the first dielectric layer, and a plurality of pairs of lead wires secured to a portion of the resistive element layer. Each pair of lead wires is connected to and corresponds with each of the zones and a protective layer is disposed over the dielectric layer. An amount of power is supplied to each of the zones and adjusted during a test run, or multiple test runs, to achieve a desired temperature profile along a heating target such as a hot runner nozzle. Methods of designing a hot runner nozzle heater using the instrumented heater sleeve are also provided.

Hot runner nozzle heater and methods of manufacture thereof

A hot runner nozzle heater is provided that includes a sleeve defining a slot extending along a length of the sleeve. A first dielectric layer is disposed over an outer surface of the sleeve, and a resistive element layer is disposed over the first dielectric layer, wherein the resistive element layer defines a resistive circuit pattern that is preferably formed by a laser trimming process. A pair of terminal leads are secured to a portion of the resistive element layer thus defining a termination area, and the termination area is positioned proximate the slot and away from the proximal end and the distal end of the sleeve. A second dielectric layer is disposed over the resistive element layer but not over the termination area, a third dielectric layer is disposed over the termination area, and a protective layer disposed over the second dielectric layer and the third dielectric layer.

Growing community of inventors

Frankenberg, Germany

Frederic Zimmermann