Hot runner nozzle heater and methods of manufacture thereof

US8175446B2 · kind B2 · utility

Assignee

• Wallow Electric Manufacturing Company

Inventors

• Elias Russegger · Bischofshofen, AT
• Gerhard Schefbanker · Bischofshofen, AT
• Gernot Antosch · Altstadt, AT
• Wolfgang Pöschl · Abtenau, AT
• Christopher C. Lanham · O'Fallon, US
• James McMillin · Algonquin, US
• William A. McDowell, III · Aurora, US
• Kenneth F. Fennewald · Maryland Heights, US
• Allen Boldt · Kirkwood, US
• Frederic Zimmermann · Frankenberg, Hesse, DE
• Reinhardt Lehnert · Ubstadt-Weiher, DE
• Kevin Ptasienski · O'Fallon, US

Key dates

• Filing date: Sep 5, 2007
• Grant date: May 8, 2012
• Expiry date: Jul 18, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/6416
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

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.