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US 2023/0364670 A1Published application
Apparatus method for locating, controlling geometry, and managing stress of hot tops for metal casting
AssigneePyrotek, Inc.
InventorJonathan KLESCH
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Abstract
A method and apparatus used to achieve alignment during mold assembly and accommodate thermal expansion comprising employing a compressible region and a modified interface dimension.
Claims25
A hot top mold assembly system, comprising:
- a hot top and a mold, said hot top including a dimension creating a locational clearance fit between the hot top and the mold, the hot top including a collar configured to mate with an end of the mold and a depending edge configured to interface with an internal wall of the mold, wherein the edge includes a deformable feature to improve alignment during assembly of the hot top with the mold and accommodate thermal expansion.
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A hot top for use in a hot top mold assembly system, the hot top comprising:
- a hot top configured to create a locational clearance fit between the hot top and a mold, the hot top including a annular wall configured to penetrate an opening of the mold assembly, a collar extending radially from an intersection with the annular wall, the collar configured to engage an end surface of the opening of the mold, wherein the annular wall further comprises a feature to restrain or locate a compressible component of the hot top.
A method to reduce thermal stress of a hot top comprising providing a locational clearance fit between the hot top and a mold, wherein the locational clearance fit of the hot top dimension at ambient temperature (So) is expressed as:
- MO≤SO≤IO/1+0.833αΔT
- wherein MO is a mold dimension at ambient temperature;
- IO is a mold interface dimension at ambient temperature;
- α is a coefficient of thermal expansion of bulk hot top material;
- and
- ΔT is temperature change between ambient temperature and casting temperature.
3 more elements
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Dependencies are inferred from the claim text.