Article Content

Print

A hydraulic press shall have a construction that the slider cannot be activated without doing the start operation after a hydraulic pump started.

An over drop distance (inertial descending value) of the slider shall be less than the value in Attachment table 4 when the protective stop mechanism in the hydraulic press acts on the slider being of a maximum dropping speed.

The hydraulic press shall have a safety stopper to support the total weight of the slider and the upper half die.

The solenoid valve in the hydraulic press or shear machine shall be a normally closed type with a spring-return construction.

The hydraulic press or shear machine shall have a safety device to prevent that hydraulic pressure goes beyond the set value.