B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/78
B21D 24/02 (2006.01)
Patent
CA 2027646
ABSTRACT OF THE DISCLOSURE Instead of the conventional type equipment, which consists of an air cylinder unit opened to atmospheric air, the present invention proposes a closed type hydraulic cylinder unit. The lower chamber and the upper chamber of the closed type cylinder unit are communicated with each other, and the differential pressure is controlled. Therefore, if the capability diagram of the press is kept in memory, the differential pressure between two chambers can be automatically con- trolled according to the desired curve. Because die cushion capability during press operation can be changed and adjusted to the value suitable for the product to be processed, a wide variety of products can be produced in high quality and with high efficiency.
Aida Engineering Ltd.
Imanishi Shozo
Swabey Ogilvy Renault
LandOfFree
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