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US 5,411,392 AGranted
Heated nozzle assembly including a heater clamp arrangement
AssigneeHusky Injection Molding Systems Ltd.
InventorStefan Von Buren
Life of this patent
Estimating the term…
Abstract
An improved heater clamp arrangement for use in molding including a channel for transferring molten plastic, a sheet-like band heater around at least a portion of the channel means for heating the channel and molten plastic, and means placing continuous pressure on the band heater to urge same towards the channel in the hot and cold condition, as a sheet-like strip.
Claims19
A heated nozzle assembly for use in plastic molding, including:
- a nozzle having a channel means for transferring molten plastic;
- an electrically activated, band heater having an outside diameter around at least a portion of said nozzle for heating said channel means and said molten plastic;
- and means adjacent said band heater placing continuous pressure on said band heater to urge said band heater towards said nozzle, said continuous pressure means comprised of a material which exhibits spring characteristics, formed with a diameter less than the outer diameter of said heater, and such that said continuous pressure means places continuous pressure on said heater to urge the heater towards said nozzle when the heater is electrically activated or deactivated.
A heated nozzle assembly for use in plastic molding, including:
- a nozzle having a channel means for transferring molten plastic;
- an electrically activated, band heater having an outside diameter around at least a portion of said nozzle for heating said channel means and said molten plastic;
- and means adjacent said band heater placing continuous pressure on said band heater to urge said band heater towards said nozzle, said continuous pressure means comprised of a material which exhibits spring characteristics, formed with a diameter less than the outer diameter of said heater, and such that said continuous pressure means places continuous pressure on said heater to urge the heater towards said nozzle when the heater is electrically activated or deactivated, and wherein said continuous pressure material includes strengthening ribs.
A heated nozzle assembly for use in plastic molding, including:
- a nozzle having a channel means for transferring molten plastic;
- an electrically activated, band heater having an outside diameter around at least a portion of said nozzle for heating said channel means and said molten plastic;
- and means adjacent said band heater placing continuous pressure on said band heater to urge said band heater towards said nozzle, said continuous pressure means comprised of a material which exhibits spring characteristics, formed with a diameter less than the outer diameter of said heater, and such that said continuous pressure means places continuous pressure on said heater to urge the heater towards said nozzle when the heater is electrically activated or deactivated, and wherein the heater has an inside surface and an outside surface, wherein the continuous pressure means engages the inside surface and is secured thereto and places the heater under tension to pull said heater towards the channel means.
Dependencies are inferred from the claim text.