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US 12,214,417 B2Granted
Casting mould for producing helical cast bodies
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsMatthias Busse, Franz-Josef Wöstmann
Life of this patent
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Abstract
The invention relates to a casting mould for producing helical cast bodies (1), in particular coils, springs or spirals, having a mould (10) in the form of a permanent mould which determines the outer contour of the helical body and consists of a ceramic material or is coated by a ceramic material; a supporting tool (8), which supports the mould (10) from outside; and a mould core (12), which defines the continuous opening within the helical body (1) and consists of a ceramic material or is coated by a ceramic material, the mould core being formed in particular as a core puller.
Claims21
A casting mold for producing a helical cast body, the casting mold comprising:
- a die in the form of a permanent mold, wherein the permanent mold establishes an outer contour of the helical cast body, wherein the die is made of a ceramic material or is coated with a ceramic material, the die comprising:
- a supporting tool, which supports the die from outside the die, and
- a mold core, which defines a continuous opening inside the helical cast body, wherein the mold core is made of a ceramic material or is coated with a ceramic material, and wherein the mold core is designed as a core puller, wherein the core puller includes two or more movable sub-bodies, wherein the two or more movable sub-bodies are movable with respect to one another and wherein at least two of the two or more movable sub-bodies form a portion of a surface of the core puller that abuts the helical cast body, wherein the core puller comprises at least two non-dissolvable sub-bodies, wherein the at the least two non-dissolvable sub-bodies form a portion of a surface of the core puller that abuts the helical cast body, and wherein only the at least two non-dissolvable sub-bodies make contact with a casting material or melt.
A casting mold for producing a helical cast body, comprising:
- a die in the form of a permanent mold which forms an outer contour of the helical cast body, wherein the die is made of a ceramic material or is coated with a ceramic material, the die including:
- a supporting tool configured to support the die from outside the die;
- a mold core that defines a continuous opening inside the helical cast body, wherein the mold core is made of a ceramic material or is coated with a ceramic material, and wherein the mold core is designed as a core puller, the core puller comprising:
- a projection that defines at least a portion of a helix forming the helical cast body and separates different mutually adjoining windings of the helix from one another;
- and
- two or more movable sub-bodies, wherein the two or more movable sub-bodies are movable with respect to one another, wherein at least two of the two or more movable sub-bodies form a portion of a surface of the core puller that abuts the helical cast body, wherein the core puller further comprises at least two non-dissolvable sub-bodies, wherein the at least two non-dissolvable sub-bodies form a portion of a surface of the core puller that abuts the helical cast body, and wherein only the at least two non-dissolvable sub-bodies make contact with a casting material or melt.
3 more elements
A die for a casting mold, the die comprising:
- a supporting tool configured to support the die from outside the die;
- and
- a mold core that defines a continuous opening inside a helical cast body, wherein the mold core is made of a ceramic material or is coated with a ceramic material, and wherein the mold core includes a core puller, the core puller comprising:
- a projection that defines at least a portion of a helix forming the helical cast body, and separate different, mutually adjoining windings of the helix from one another;
- and
- two or more movable sub-bodies, wherein the two or more movable sub-bodies are movable with respect to one another, and wherein at least two of the two or more movable sub-bodies form a portion of a surface of the core puller that abuts the helical cast body;
- wherein the mold core comprises at least two non-dissolvable sub-bodies, forming a portion of a surface of the core puller that abuts the helical cast body, wherein only the at least two non-dissolvable sub-bodies make contact with a casting material or melt, wherein the die is in the form of a permanent mold which establishes an outer contour of the helical cast body, wherein the die comprises a ceramic material or is coated with a ceramic material, and wherein the die includes a multi-piece die and is configured such that multiple parts of the die are removed from one another after each casting process for demolding.
4 more elements
Dependencies are inferred from the claim text.