US 4,358,263 AGranted

Press apparatus

AssigneeHonda Giken Kogyo Kabushiki Kaisha

InventorsMotoatsu Shiraishi, Tatsushi Matsuda, Masao Sano

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Abstract

A press of improved moldability and operation efficiency, including an upper movable die having a concave bottom surface, a lower, stationary arc having a convex top surface conforming to the concave bottom surface of the upper die, a blank holder arranged around the lower die for vertical sliding movement, and a blank support lever arm pivotally mounted on top of the blank holder. The blank holder is normally held raised by cushion means in such a position that its top surface is lower than the crest of the convex top surface of the lower die. The blank support lever arm is normally biased to a horizontal position to support a blank in a horizontal position in co-operation with the crest of the lower die and is tilted down by the upper die in downstroke movement out of its path, allowing the blank to be pressed down.

Claims6

Dependent claims

A press apparatus comprising:

a lower, stationary die having a convex top surface;
an upper die arranged above said lower die for vertical movement relative thereto and having a concave bottom surface facing opposite to and conforming to the convex top surface of said lower die;
a blank holder arranged around said lower die for vertical sliding movement relative thereto and normally urged by cushion means to a top limit position in which the top surface of said blank holder is held at a level lower than that of the crest of the convex top surface of said lower die;
and a blank support lever arm mounted on the top surface of said blank holder for pivotal movement in a vertical plane and normally urged to a horizontal position to support a blank in a horizontal position in co-operation with the crest of the convex top surface of said lower die, said blank support lever arm being arranged so as to be tilted down by said upper die out of the path of down-stroke movement thereof to allow the blank to be pressed down.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 06/286,522Filed 24 Jul 1981
Priority: JP 55-10591426 Jul 1980
Granted: 9 Nov 1982
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B21D 43/26
Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or…:…
B21D 22/02
Shaping without cutting, by stamping, spinning, or deep-drawing: stamping using rigid devices or tools
B21D 22/06
Stamping using rigid devices or tools: having relatively-movable die parts
Y10S 425/048
Plastic article or earthenware shaping or treating: apparatus: sheet clamping