Injection molding nozzle tip insulator and injection molding device

An insulator for an injection molding nozzle tip comprising:

• an inner conductive portion adapted to surround and be in contact with the nozzle tip;
• an outer insulative portion surrounding said inner portion, an inner surface of said outer portion contacting an outer surface of said inner portion along at least a portion of the surfaces, said outer insulative portion comprising a solid and being in direct contact with said inner annular portion throughout an entire length of said inner annular portion.

An insulator for an injection molding nozzle tip comprising:

• an inner portion adapted to surround and be in contact with the nozzle tip;
• and
• an outer insulative portion surrounding said inner portion, an inner surface of said outer portion contacting an outer surface of said inner portion along at least a portion of the surfaces, wherein said outer insulative portion comprises polyamide, and wherein a distal end of the outer insulative portion is recessed relative to the inner portion at ambient temperature, such that the outer insulative portion does not protrude beyond the inner portion and cause a stagnant zone when heated.

A nozzle tip insulator for use with an injection molding nozzle tip having an opening end and a tip end, said insulator comprising:

• an inner conductive ring adapted to contact an outer surface of the nozzle tip;
• an outer insulative ring concentric with said inner conductive ring, an inner surface of said outer insulative ring contacting an outer surface of said inner conductive ring, said outer insulative ring comprising a solid and being less heat-conductive than said inner conductive ring, said inner conductive ring having a flange extending over and contacting at least a portion of an end of said outer insulative ring, a furthest extremity of said inner conductive ring in a longitudinal direction of the tip end being in direct contact with said outer insulative ring.

An injection molding nozzle tip insulator for a nozzle tip having an opening end and a tip end, said insulator comprising:

• inner means, in contact with an outer surface of a nozzle tip, for conducting heat;
• outer means for insulating the heat conducted by said inner means, said outer means surrounding said inner means, an inner surface of said outer means contacting an outer surface of said inner means along at least a portion of their respective surfaces, wherein an outermost longitudinal end of said inner means in the direction of the nozzle tip end directly contacts said outer means, said outer means comprising a solid.

An injection molding nozzle tip insulator, comprising:

• inner means, in contact with an outer surface of a nozzle tip, for conducting heat;
• outer means for insulating the heat conducted by said inner means, said outer means surrounding said inner means, an inner surface of said outer means directly contacting an outer surface of said inner means along an entire outer surface of said inner means, said outer means comprising polyamide.

An injection molding nozzle comprising:

• a nozzle housing having a head end and a tip end;
• a nozzle tip thermal insulator disposed adjacent said nozzle tip end having an inner portion and an outer portion, the inner portion surrounding and in contact with an outer surface of said nozzle housing, said inner portion having a flange in contact with and extending over at least a portion of the distal end of the outer portion, the inner portion and the outer portion each comprising a solid having different thermal insulation coefficients, where the inner portion has a thermal insulation coefficient that is lower than the thermal insulation coefficient of the outer portion.