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Patent Searching and Data


Document Type and Number:
Japanese Patent JPH0575504
Kind Code:
B2
Abstract:
A clamping cylinder system used in a diecast machine and the like and includes a clamping cylinder (1) and a booster cylinder (2). The booster cylinder (2) has two chambers (9, 10) different in inner diameters, and a booster piston (8) has a small diameter (D2) portion and a large diameter (D1) portion, which correspond to the inner shapes of these chambers. During the low pressure of the clamping cylinder, the oil pressure is given to the clamping cylinder (1), with the booster cylinder (2) being in non-operating condition, and, when a booster operating signal is given, the booster piston (8) is operated. With this arrangement, a boosted pressure force in accordance with the ratio of the area between the small diameter (D2) portion and the large diameter (D1) portion of the booster piston (8) can be obtained.

Inventors:
IWAMOTO NORIHIRO
Application Number:
JP25674689A
Publication Date:
October 20, 1993
Filing Date:
September 29, 1989
Export Citation:
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Assignee:
TOSHIBA MACHINE CO LTD
International Classes:
F15B11/028; B22D17/26; B29C33/24; B29C45/67; F15B3/00; (IPC1-7): B22D17/26; B29C33/24; B29C45/67; F15B11/02