Heated injection nozzle

Details Heated injection nozzle Heated injection nozzle

1979-07-12

1981-05-19

Pavelko, Thomas P.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to heat or cool

425548, B29F 103, B29F 108

Patent

active

042682410

ABSTRACT:
A nozzle for the injection of liquefied plastic material into the gate of a mold cavity has a tubular metallic body forming a sprue, the outer surface of this body being in contact with an annular heater in the shape of a closed shell whose interior is filled with a matrix of compacted MgO powder having one or more resistance wires embedded therein. The heater is held in position by a nut, threaded onto a gate-side extremity of the body, against a shoulder or a tapering surface portion thereof and is separated by an air space from a surrounding supporting structure.

REFERENCES:
patent: 2411847 (1946-12-01), Bokeeno
patent: 2529146 (1950-11-01), Feitl
patent: 2566101 (1951-08-01), Vltarsky
patent: 2567147 (1951-09-01), Cousino
patent: 3037245 (1962-06-01), Darnell
patent: 3530539 (1970-09-01), Gellert
patent: 3677682 (1972-07-01), Putkowski
patent: 4043740 (1977-08-01), Gellert
patent: 4173448 (1979-11-01), Rees

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