Punch press shedder pin knockout arrangement
OwnerRichard J. Greenleafinventor
Life of this patent
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Abstract
A punch press arrangement for the manufacture of a stamped-out part from a sheet of “part” material, comprising a punch member for shaping a part from the part material, and a first shedder pin arranged in the punch member to plastically deform against the part being created to prevent “pulling” and retention of the stamped out part on the punch member on the punch member's return stroke.
Claims14
A punch press arrangement for the manufacture of a stamped-out part from a sheet of “part” material, comprising:
- a punch member for piercedly shaping a part from the part material;
- a first “shedder pin” having a distal end arranged extend through the punch member to plastically deform against the part being created to prevent “pulling” of the part by the punch member on its return stroke.
A method of eliminating the “pulling” of a stamped-out-part by a knock-out member in a compound punch press arrangement, comprising:
- placing an elongated compressible plastic shedder pin in a knock-out member of that punch press arrangement;
- arranging a distal end of the shedder pin to extend beyond the distal end of the knock-out member;
- and
- plastically compressing the shedder pin against the part as the punch press arrangement cuts out that part during the stamping operation.
A method of eliminating the “pulling” of a stamped-out-part from a part material layer by a punch member in a progressive punch press arrangement, comprising:
- placing an elongated compressible plastic shedder pin in a first punch member of that progressive punch press arrangement;
- placing an elongated compressible plastic shedder pin in a further punch member of that progressive punch press arrangement;
- arranging a distal end of the shedder pins to extend beyond the distal end of the first punch member and the further punch member;
- and
- plastically compressing the shedder pins against the part material layer as the punch press arrangement cuts out that part from the part material layer during the stamping operation.
Dependencies are inferred from the claim text.