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US 9,408,256 B2Granted
Removeable heating device for a heating channel nozzle
AssigneeOtto Männer Innovation GmbH
InventorSwen Spuller
Life of this patent
Estimating the term…
Abstract
A removable heating device for a hot runner nozzle contains an elongated heating unit which exhibits at least one longitudinal slot which does not extend as far in the longitudinal direction as the length of a substantially cylindrical heating unit and which enables an enlargement of the inner diameter of the heating unit by its open end. The heating device further has a channel disposed in the outer surface of the heating unit in which an electrical heating element is disposed. Furthermore, a heater/thermocouple assembly contains such a heating device and at least one thermocouple for detecting the temperature in the front end region of the hot runner nozzle.
Claims57
A removable heating device for a hot runner nozzle, comprising:
- an elongated heating unit formed from a thermoconductive material, said elongated heating unit having an inner diameter, a length, an axis, an inner surface, an outer surface and a wall thickness;
- said elongated heating unit having at least one first longitudinal slot formed therein and said first longitudinal slot does not extend as far in a longitudinal direction as said length of said elongated heating unit being a cylindrical heating unit, said first longitudinal slot having a width and an open end on a first face side of said elongated heating unit and a closed end on a second face side of said elongated heating unit so as to form a first bridge limiting an enlargement of said inner diameter of said elongated heating unit on one end of said elongated heating unit, wherein an enlargement of said inner diameter is enabled by said open end of said first longitudinal slot;
- said elongated heating unit having a channel formed therein in said outer surface of said elongated heating unit and said channel winding around said elongated heating unit, said channel defining a bottom surface and two side walls, said channel running completely around said elongated heating unit and crossing said first longitudinal slot at least once;
- and
- an electrical heating element with a heater housing and a heater wire disposed in said heater housing, said heater housing being at least partially disposed in said channel and being in direct contact with said bottom surface and with at least one of said two side walls so as to transfer heat generated by said electrical heating element to the hot runner nozzle via contact between said inner surface of said elongated heating unit and an outer surface of the hot runner nozzle, and wherein said electrical heating element limiting said elongated heating unit from radially expanding in an area of said first longitudinal slot due to warming or due to mechanical force.
2 more elements
A removable heater/thermocouple assembly for a hot runner nozzle, the removable heater/thermocouple assembly comprising:
- a thermocouple having a temperature detecting section;
- and
- a heating device, containing:
- an elongated heating unit formed from a thermoconductive material, said elongated heating unit having an inner diameter, a length, an axis, an inner surface, an outer surface and a wall thickness;
- said elongated heating unit having at least one first longitudinal slot formed therein and said first longitudinal slot does not extend as far in a longitudinal direction as said length of said elongated heating unit being a cylindrical heating unit, wherein said first longitudinal slot having a width and an open end on a first face side of said elongated heating unit and a closed end on a second face side of said elongated heating unit so as to form a first bridge limiting an enlargement of said inner diameter of said elongated heating unit on one end of said elongated heating unit, wherein the enlargement of said inner diameter is enabled by said open end of said first longitudinal slot;
- and
- said elongated heating unit having a channel formed in said outer surface of said elongated heating unit and winding around said elongated heating unit, said channel having a bottom surface and two side walls, wherein said channel running completely around said elongated heating unit and crossing said first longitudinal slot at least once;
- and
- an electrical heating element containing a heater housing and a heater wire disposed in said heater housing, wherein said heater housing being at least partially disposed in said channel and being in direct contact with said bottom surface and with at least one of said two side walls so as to transfer heat generated by said elongated heating element to the hot runner nozzle via contact between said inner surface of said elongated heating unit and an outer surface of the hot runner nozzle, and wherein said electrical heating element limiting said elongated heating unit from radially expanding in an area of said first longitudinal slot due to warming or due to mechanical force.
6 more elements
Dependencies are inferred from the claim text.