US Patent: 638,808
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| Vertical Piercing-Press.
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Patentee:
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| Emil F. Holinger (exact or similar names) - McKeesport, Allegheny County,, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 27, 1899 |
| Granted: |
Dec. 12, 1899 |
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Joel Havens
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Description: |
| Abstract:
This improvement relates to the type of apparatus for producing hollow ingots employing a stationary vertical punch, which serves to support a hot billet upon its upper end and [o which is combined with a vertically reciprocal matrix and a vertically- reciprocal ram for driving the matrix downward, and thereby compelling it to envelop the billet and force the metal thereof into the annular 15~ space between the surface of the stationary punch and the wall of the matrix.
Claim:
In a piercing-press for producing hollow billets, the combination, as herein set forth, of a stationary vertical punch for supporting a billet upon its upper end; a vertically-reciprocal matrix-carriage; means for imparting appropriate vertical movements to said carriage; a matrix secured to said carriage and interiorly provided near its upper end with an annular shoulder corresponding io5 in width to the thickness of the wall of the pierced billet; a vertically reciprocal ram adapted to hear upon the upper end of said matrix and provided with an extension adapted to fill the upper part of said matrix, and terminating at its lower end in or near the plane of said annular shoulder; a bearing-block for interposition between the upper end of said matrix and the lower end of said ram extension, and a hydraulic piston for actuating said ram.
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