Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Punching article from sheet material
Patent
1987-12-01
1989-07-04
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Punching article from sheet material
83 36, 83206, 83268, 264544, 4253021, 425397, B26D 520, B29C 5100
Patent
active
048448524
ABSTRACT:
Method and apparatus for forming a web of uncut thermoplastic articles from a sheet of material and severing the uncut articles from the web of unseparated articles by precisely locating the unseparated articles with respect to a cutting tool and, once located, cutting the product from the web. Male locating pins included as part of the trimmer and spaced a known distance from the cutting edge move forward to engage web deformations. The forward movement of the male locating pin delivers sufficient force to the deformations to center them on the male locating pin. Continued forward movement forces the other side of the deformation into contact with a female locating pin included as part of the die and spaced the same known distance from the die edge. The female locating pin grabs the deformation to place the sheet in the desired location. Once the article has been precisely located with respect to the cutting edge, the sheet of uncut articles is pressed against the die face and the articles are cut from the sheet.
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Die Design and Diemaking Practice; The Industrial Press, New York City, 1951, p. 196.
Keyser Stephen R.
Vadney David
Heitbrink Jill L.
McKillip Alexander J.
Mobil Oil Corporation
Silbaugh Jan H.
Speciale Charles J.
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