Method and apparatus for applying a layer of material to a centrifugal casting mold
OwnerCharles H. Nobleinventor
Life of this patent
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Abstract
Method and apparatus for establishing a layer of particulate material on at least a portion of the internal surface of a centrifugal casting mold by confining a quantity of the particulate material in a cavity, inserting the cavity into the mold, rotating the mold and the cavity at substantially the same rate adequate to apply substantial centrifugal force to the particulate material in the cavity, and opening the cavity to release the particulate material while continuing to rotate the mold and the cavity.
Claims26
In apparatus for establishing a layer of particulate material on at least a portion of the active surface of a rotatable centrifugal casting mold, the combination of
- a hollow outer member having an outer surface and an inner surface,
- the dimensions and shapes of the outer surface being such that at least a portion of the outer member can be inserted axially into the mold;
- an inner unit comprising
- first means capable of cooperating with the outer member to define cavity to accommodate the particulate material to be applied to the mold, and
- a shaft extending axially relative to said first means;
- at least one of the outer member and the inner unit comprising means engageable with the mold to cause the apparatus to rotate with the mold;
- the outer member and the inner unit being so constructed and interrelated that at least one of the outer member and the inner unit can be moved axially relative to the other in order to progressively open the cavity to allow radial release of particulate material held by the cavity when the mold and the apparatus are rotating;
- and means for accomplishing such relative axial movement while the mold and the apparatus are rotating.
The method for establishing a layer of particulate material on at least a portion of the active surface of a rotatable centrifugal casting mold, comprising
- confining a quantity of the particulate material in a closed cavity with the particulate material in such condition as to be projectable under centrifugal force;
- rotating the mold at a rate adequate to densify the layer of said particulate material when a layer of that material has been established on the active surface of the mold;
- introducing the cavity into the mold and rotating the cavity at substantially the same rate as the mold, that rate being adequate to apply a substantial centrifugal force to the particulate material confined in the activity;
- while continuing to rotate the mold and cavity at such rates, progressively opening the cavity to release the particulate material centrifugally from the cavity with the centrifugal force then applying the released particulate material to the active surface of the mold in the form of a layer;
- and
- then withdrawing the cavity from the mold.
Dependencies are inferred from the claim text.