Patent ID: 6625873
Filing Date: 2003-09-30
Classification: B29C,Y10T

Abstract:
A method of making an injection molding nozzle comprising the steps of:making an inner portion having a melt bore extending therethrough, a front end, an outer surface, and a heater groove in the outer surface; placing a heater element in the heater groove; metallurgically bonding the heater element to the inner portion using a first bonding material; and then metallurgically bonding a tip insert to the front end of the inner portion using a second bonding material, wherein the second bonding material has a lower melting temperature than the first bonding material, and the step of metallurgically bonding the tip insert comprises heating the inner portion and the tip insert to a temperature that is above the melting temperature of the second bonding material and below the melting temperature of the first bonding material so as not to disrupt the metallurgical bond between the heater element and the inner portion.