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US 2006/0048559 A1Published application
Method for making punch head of paper punch
OwnerChien-Chuan Huanginventor
Life of this patent
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Abstract
A method for making punch heads includes a step of pulling a cylindrical metal material wrapped around a mandrel; a step of cutting the cylindrical metal material into sections; a step of inserting the sections into concavity of a mold set and punching a recess in a first end of each section by a first tool; a step of punching the recess into V-shaped recess and including a punching edge by a second tool; a step of pushing the sections out from the mold set by a pushing rod; and a step of obtaining a punch head.
Claims6
A method for making punch heads, comprising:
- step 1:
- pulling cylindrical metal material wrapped around a mandrel;
- step 2:
- cutting the cylindrical metal material into sections;
- step 3:
- inserting the sections into concavity of a mold set and punching a recess in a first end of each section by a first tool;
- step 4:
- punching the recess into a V-shaped recess and including a punching edge by a second tool;
- step 5:
- pushing the sections out from the mold set by a pushing rod;
- step 6:
- obtaining a punch head.
9 more elements
Dependencies are inferred from the claim text.