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US 9,221,096 B2Granted
Centrifugal casting apparatus and method
AssigneeATI Properties, Inc.
InventorsJohn W. Foltz, IV, Raul A. Martinez-Ayers, Aaron L. Fosdick
Life of this patent
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Abstract
A centrifugal casting apparatus includes a rotatable assembly to rotate about a rotation axis. The rotatable assembly includes a sprue chamber positioned about the rotation axis and is shaped to receive a supply of molten material. A first gate and a second gate are positioned to receive molten material from the sprue chamber in a general direction of centrifugal force. A first cavity and a second cavity are stacked and are respectively positioned to receive molten material from the first gate and the second gate in the general direction of centrifugal force.
Claims62
A centrifugal casting apparatus comprising:
- a rotatable assembly configured to rotate about a rotation axis, wherein the rotatable assembly comprises:
- a sprue chamber positioned about the rotation axis and structured to receive a supply of molten material;
- a first gate positioned to receive molten material from the sprue chamber in a general direction of centrifugal force;
- a second gate positioned to receive molten material from the sprue chamber in the general direction of centrifugal force;
- a first cavity positioned to receive molten material from the first gate in the general direction of centrifugal force, wherein the first gate comprises a volume greater than a volume of an equal adjacent length of the first cavity;
- and
- a second cavity positioned to receive molten material from the second gate in the general direction of centrifugal force;
- wherein the first cavity and the second cavity are stacked.
5 more elements
A centrifugal casting mold comprising:
- a front face configured to receive a supply of molten material;
- a back face;
- a first cavity and a second cavity, each extending from the front face toward the back face and defined by a sidewall and a back wall adjacent to the back face of the mold, wherein the first and second cavities are stacked and configured to receive molten material in a general direction of centrifugal force extending radially outward from a rotational axis of the mold;
- and
- a first gate defined in the mold positioned between the front face and the first cavity, wherein the first gate is configured to receive molten material in a general direction of centrifugal force extending radially outward from the rotational axis of the mold, and wherein the first gate comprises a volume greater than a volume of an equal adjacent length of the first cavity;
- wherein the mold is structured to differentially insulate each of the first and second cavities such that for each of the first and second cavities a rate of heat extraction from the molten material is greater at the back wall than a rate of heat extraction at the sidewall, promoting directional solidification from the back wall in a general direction extending toward the rotational axis of the mold.
3 more elements
A centrifugal casting mold comprising:
- a front face configured to receive a supply of molten material;
- a back face;
- a first cavity extending from the front face toward the back face, the first cavity defined by a sidewall and a back wall adjacent to the back face of the mold;
- and
- a first gate defined in the mold positioned between the front face and the first cavity, wherein the first gate comprises a cross-sectional area larger than a cross-sectional area of the first cavity, and wherein the first gate is configured to receive molten material in a general direction of centrifugal force.
2 more elements
A centrifugal casting mold comprising:
- a front face comprising a first material supply port configured to receive a supply of molten material;
- a back face;
- a first cavity extending from the first material supply port toward the back face, the first cavity defined by a sidewall and a back wall adjacent to the back face of the mold;
- a first gate defined in the mold positioned between the front face and the first cavity, wherein the first gate is configured to receive molten material in a general direction of centrifugal force extending radially outward from a rotational axis of the mold, and wherein the first gate comprises a volume greater than a volume of an equal adjacent length of the first cavity;
- and
- the first cavity comprising a decreasing cross-sectional area along a length of the first cavity.
3 more elements
A centrifugal casting mold comprising:
- a front face comprising a first material supply port and a second material supply port, the first and second material supply ports configured to receive a supply of molten material;
- a back face;
- a first cavity extending from the first material supply port toward the back face, the first cavity defined by a sidewall and a back wall adjacent to the back face of the mold, the first cavity comprising a continually decreasing cross-sectional area from the front face to the back face of the first cavity;
- a first gate defined in the mold positioned between the front face and the first cavity, wherein the first gate comprises a cross-sectional area larger than a cross-sectional area of the first cavity, and wherein the first gate is configured to receive molten material in a general direction of centrifugal force extending radially outward from a rotational axis of the mold;
- and
- a second cavity extending from the second material supply port toward the back face, wherein the second cavity is defined by a sidewall and a back wall adjacent to the back face of the mold, the second cavity comprising a continually decreasing cross-sectional area from the front face to the back face of the second cavity and wherein the first cavity and the second cavity are stacked.
3 more elements
A centrifugal casting apparatus comprising:
- a rotatable assembly configured to rotate about a rotation axis, wherein the rotatable assembly comprises:
- a sprue chamber positioned about the rotation axis and structured to receive a supply of molten material;
- a first gate positioned to receive molten material from the sprue chamber in a general direction of centrifugal force;
- a second gate positioned to receive molten material from the sprue chamber in the general direction of centrifugal force;
- a first cavity positioned to receive molten material from the first gate in the general direction of centrifugal force, wherein the first gate comprises a diameter larger than a diameter of the first cavity;
- and
- a second cavity positioned to receive molten material from the second gate in the general direction of centrifugal force;
- wherein the first cavity and the second cavity are stacked.
5 more elements
A centrifugal casting apparatus comprising:
- a rotatable assembly configured to rotate about a rotation axis, wherein the rotatable assembly comprises:
- a sprue chamber positioned about the rotation axis and structured to receive a supply of molten material;
- a first gate positioned to receive molten material from the sprue chamber in a general direction of centrifugal force;
- a second gate positioned to receive molten material from the sprue chamber in the general direction of centrifugal force;
- a first cavity positioned to receive molten material from the first gate in the general direction of centrifugal force, wherein the first gate comprises a diameter larger than a diameter of the first cavity, and wherein the first gate comprises a cross-sectional area between 125% and 150% of a cross-sectional area of the first cavity, and a length between 50% and 150% of the largest dimension of a cross-section of the first gate;
- and
- a second cavity positioned to receive molten material from the second gate in the general direction of centrifugal force;
- wherein the first cavity and the second cavity are stacked.
5 more elements
A centrifugal casting mold comprising:
- a front face configured to receive a supply of molten material;
- a back face;
- and
- a first cavity and a second cavity, each extending from the front face toward the back face and defined by a sidewall and a back wall adjacent to the back face of the mold, wherein the first and second cavities are stacked and configured to receive molten material in a general direction of centrifugal force extending radially outward from a rotational axis of the mold;
- and
- a first gate defined in the mold positioned between the front face and the first cavity, wherein the first gate comprises a cross-sectional area larger than a cross-sectional area of the first cavity, and wherein the first gate is configured to receive molten material in a general direction of centrifugal force extending radially outward from the rotational axis of the mold;
- wherein the mold is structured to differentially insulate each of the first and second cavities such that in each of the first and second cavities a rate of heat extraction from the molten material is greater at the back wall than a rate of heat extraction at the sidewall to promote directional solidification from the back wall in a general direction extending toward the rotational axis of the mold.
4 more elements
A centrifugal casting mold comprising:
- a front face comprising a first material supply port configured to receive a supply of molten material;
- a back face;
- a first cavity extending from the first material supply port toward the back face, the first cavity defined by a sidewall and a back wall adjacent to the back face of the mold;
- a first gate defined in the mold positioned between the front face and the first cavity, wherein the first gate comprises a cross-sectional area larger than a cross-sectional area of the first cavity, and wherein the first gate is configured to receive molten material in a general direction of centrifugal force extending radially outward from a rotational axis of the mold;
- and
- the first cavity comprising a decreasing cross-sectional area along a length of the first cavity.
3 more elements
A centrifugal casting mold comprising:
- a front face comprising a first material supply port and a second material supply port, the first and second material supply ports configured to receive a supply of molten material;
- a back face;
- a first cavity extending from the first material supply port toward the back face, the first cavity defined by a sidewall and a back wall adjacent to the back face of the mold, the first cavity comprising a continually decreasing cross-sectional area from the front face to the back face of the first cavity;
- a first gate defined in the mold positioned between the front face and the first cavity, wherein the first gate is configured to receive molten material in a general direction of centrifugal force extending radially outward from a rotational axis of the mold, and wherein the first gate comprises a volume greater than a volume of an equal adjacent length of the first cavity;
- and
- a second cavity extending from the second material supply port toward the back face, wherein the second cavity is defined by a sidewall and a back wall adjacent to the back face of the mold, the second cavity comprising a continually decreasing cross-sectional area from the front face to the back face of the second cavity and wherein the first cavity and the second cavity are stacked.
3 more elements
Dependencies are inferred from the claim text.