Patent ID: 8905741
Filing Date: 2014-12-09
Classification: B29C

Abstract:
1. An injection molding nozzle comprising: an elongated base body with a channel extending there through for receiving a melt an elongated temperature control element arranged on the elongated base body and including a carrier sleeve and a heating element secured to the carrier sleeve for introducing heat into the base body, the heating element comprising an upper area heating coil and a lower area heating coil arranged in the end areas of the carrier sleeve, wherein each heating coil comprises multiplies windings that are at least partly embedded in one or more external heating grooves, so that at least two adjacent windings along a longitudinal axis of said elongated temperature control element are spaced from each other by at least a sidewall of said one or more heating grooves, where the upper area heating coil and the lower area heating coil are spaced apart and are interconnected by a heater connecting line arranged in a groove extending along the base body, whereby the length of the heating windings in the center part of the base body defined by the heater connecting line is minimal to further reduce an amount of heat energy conducted into the center area of the base body, and where the carrier sleeve further comprises a first longitudinal slot along one side of the heater connecting line and a second longitudinal slot along the other side of the heater connecting line for further reducing the heat input in the center area of the base body relative to the heat input at the upper and lower end portions of the temperature control element.