Heated control pin
AssigneePyrotek High Temperature Industrial Products Inc.
InventorsSylvain Tremblay, Jens Bouchard, Michael Bouchard
Life of this patent
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Abstract
A control pin for controlling the flow of molten metal through a down spout in a casting process is provided. The control pin comprises a body having an elongated shape, a lower portion insertable in the down spout, and a terminal end, opposite the lower portion. The body includes a central core, preferably a hollow tube or a rod of alumina or mullite; a heating element disposed around the central core, and an intermediate layer surrounding the central core and encasing the heating element, the intermediate layer being made of a solidified ceramic putty. Finally, an outer shell, preferably made of woven fiber reinforcing fabric in a matrix of ceramic, surrounds the intermediate layer.
Claims26
A control pin for controlling flow of molten metal through a down spout in a casting process, the control pin comprising:
- a body having an elongated shape, a lower portion insertable in the down spout, and a terminal end, opposite the lower portion, the body comprising:
- an electrically insulating central core;
- a heating element disposed around the central core,
- an intermediate layer surrounding the central core and encasing the heating element;
- and
- an outer shell surrounding the intermediate layer.
A control pin for controlling a flow of molten metal through a down spout in a casting process, the control pin comprising:
- a body having an elongated shape, a lower portion insertable in the down spout, and a terminal end, opposite the lower portion, the body comprising:
- a tube or rod made of alumina or mullite;
- a resistive wire wrapped around the tube or rod;
- an intermediate layer of dried and solidified ceramic putty, surrounding the tube or rod and encasing the resistive wire;
- a tip made of an electrically insulating and heat conducting material, located below the tube or rod and the intermediate layer, and
- an outer shell surrounding the tip and the intermediate layer, the outer shell comprising multiple layers of reinforcing fabric, embedded in a ceramic matrix.
Dependencies are inferred from the claim text.