Injection molding heater including circuit breaking means
AssigneeHusky Injection Molding Systems Ltd.
InventorsHarald Schmidt, Edward J. Jenko
Life of this patent
Estimating the term…
Abstract
An injection molding heater system for heating molding resins or plastics includes a plurality of heaters for heating resin wherein each of the heaters is positioned adjacent a nozzle or manifold. The system also includes an electrical circuit which is connected with the heaters and carries electricity from a power source to each of the heaters in order to energize the heaters. A plurality of circuit breaking devices are incorporated in the circuit for discontinuing the flow of electricity through each of the electrical circuits for preventing circuit damage in case of overcurrent, surges or the like. At least one circuit breaker is positioned in each of the electrical circuits between the power source and each of the heaters.
Claims25
An electric heater system for heating molding material to maintain the flowability of the material in an injection molding device, comprising:
- a flow path means for directing the flow of the material in the injection molding device, wherein said flow path means is a mold manifold;
- at least one heating means for heating said material for facilitating flow through said flow path means, said heating means positioned adjacent said flow path means;
- an electrical circuit means in said mold manifold connected with said heating means for carrying electric current from a power source to said heating means to energize said heating means;
- and
- a circuit breaking means for discontinuing the flow of electricity through said circuit means to prevent damage to the system, wherein said circuit breaking means is positioned in said electrical circuit means in said mold manifold between said source and said heating means, and for each one of said heating means in said circuit there is provided at least one of said circuit breaking means.
Dependencies are inferred from the claim text.