| 摘要 |
PROBLEM TO BE SOLVED: To lower the height of an elevation device of a core in a die for die casting. SOLUTION: A large capacity cylinder 106 having high pressure and low velocity and a small capacity cylinder 204 having low pressure and high velocity are separately disposed in a fixed die block 101 and a movable die block 201, respectively. The piston rods 106a, 204a of both cylinders 106, 204 are mechanically connected or separated by linking with the moving to the front or the rear parts of the movable die block 201.
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