Heat dissipation device for and method of dissipating heat from a nozzle
AssigneeMold-Masters Limited
InventorRobert Trudeau
Life of this patent
Estimating the term…
Abstract
An injection molding apparatus comprises a manifold having a manifold channel for receiving a melt stream of moldable material under pressure. A nozzle having a nozzle channel receives the melt stream from the manifold channel and delivers the melt stream through a mold gate to a mold cavity. The nozzle includes a nozzle head, a nozzle body and a nozzle tip. A heat dissipation device is coupled to the nozzle body at a location between the nozzle head and the nozzle tip to regulate the temperature of the nozzle and maintain it within a predetermined temperature range.
Claims30
An injection molding apparatus, comprising:
- a manifold having a manifold channel for receiving a melt stream of moldable material under pressure;
- a nozzle having a nozzle channel in communication with said manifold channel for receiving the melt stream from said manifold channel, said nozzle having a nozzle head and a nozzle tip;
- a mold plate having a mold cavity and an opening into which said nozzle is inserted;
- and
- a heat dissipation device coupled to said nozzle at a location between said nozzle head and said nozzle tip wherein said heat dissipation device is spaced from the mold plate when a temperature of said nozzle is below a predetermined temperature;
- and
- wherein said heat dissipation device thermally expands and contacts said mold plate when a temperature of said nozzle is above the predetermined temperature.
An injection molding apparatus, comprising:
- a manifold having a manifold channel for receiving a melt stream of moldable material under pressure;
- a nozzle having a nozzle channel in communication with said manifold channel for receiving the melt stream from said manifold channel, said nozzle having a nozzle head and a nozzle tip;
- a nozzle heater coupled to said nozzle;
- a mold plate having a mold cavity and an opening into which said nozzle is inserted;
- and
- a heat dissipation device coupled to said nozzle at a location between said nozzle head and said nozzle tip, said heat dissipation device having a first spatial orientation spaced from the mold plate when said nozzle is at a temperature below a predetermined temperature and a second spatial orientation when said nozzle is at a temperature greater than the predetermined temperature, wherein said first and second orientations differ in that said second orientation contacts said mold plate.
A heat dissipation device for use in an injection molding apparatus, comprising:
- one or more layers of material, each layer having a first end and a second end, wherein said first end is coupled to a nozzle, said heat dissipation device having a first spatial orientation spaced from an adjacent mold plate when the nozzle is at a temperature below a predetermined temperature and a second orientation when the nozzle is at a temperature greater than the predetermined temperature, wherein said first and second orientations differ in that said second orientation includes said second end in contact with said adjacent mold plate.
A method of dissipating heat from a nozzle of an injection molding apparatus, comprising:
- providing a heat dissipation device made from at least one thermally expanding material having a first end and second end;
- coupling said first end to said nozzle of said injection molding apparatus;
- positioning a second end of said device such that thermal expansion causes said second end to come into contact with a cooler member when said nozzle is heated to a predetermined temperature;
- and
- heating said nozzle to greater than said predetermined temperature.
A method of dissipating heat from a nozzle of an injection molding apparatus, comprising:
- providing an injection molding nozzle;
- providing a mold plate adjacent but not contacting said injection molding nozzle;
- providing a heat dissipation device having a first end and a second end;
- coupling said first end to said injection molding nozzle;
- directing heat away from said nozzle by allowing said heat dissipation device to thermally expand and come into contact with said mold plate when said nozzle temperature increases beyond a predetermined temperature.
Dependencies are inferred from the claim text.