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Wiland Astfalck
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Individual
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24,450. Astfalck, W. Nov. 1. Punching; squirting.-In squirting tubes &c., a hole larger than the mandrel d is first made through the billet b by a loose punch m, which is pushed off the end of the mandrel and through the die hole e along with the punching f by the squirted tube i. The punch m may have a collar n of the same size as the hole e, and the loss of the punching f may be prevented by a plug r. The mandrel d and plunger c may be in one, or separate.
GB190624450D1906-11-011906-11-01Improvements in the Method and Apparatus for the Manufacture of Tubular Metal Bodies.
ExpiredGB190624450A
(en)