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US 11,958,263 B2Granted
Molding die and manufacturing method for the same
AssigneeKYOCERA Corporation
InventorHiroshi Hamashima
Life of this patent
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Abstract
A molding die according to the present disclosure includes a tubular portion and a base portion that closes an end portion of the tubular portion at one side. A cut level difference Rδc1 in a roughness curve of an inner wall surface of the tubular portion is smaller than a cut level difference Rδc2 in a roughness curve of an inner wall bottom portion of the base portion. The cut level difference represents a difference between a cut level at a load length ratio of 25% in a roughness curve and a cut level at a load length ratio of 75% in the roughness curve.
Claims16
A molding die comprising:
- a tubular portion;
- and
- a base portion configured to close an end portion of the tubular portion, wherein
- a cut level difference Rδc1 in a roughness curve of an inner wall surface of the tubular portion is smaller than a cut level difference Rδc2 in a roughness curve of an inner wall bottom portion of the base portion, and
- a cut level difference is defined by a difference between a cut level at a load length ratio of 25% in a roughness curve and a cut level at a load length ratio of 75% in the roughness curve.
2 more elements
Dependencies are inferred from the claim text.