| 摘要 |
Casting apparatus comprising means for feeding molten material, a mold receiving the molten material in which the molten material solidifies forming a casting advancing through the mold, a cylinder, means including a piston operable in the cylinder ahead of the advancing casting limiting the speed of advance of the casting, means including a fluid pressure system for controlling the speed of advance of the piston in the cylinder by differential pressure on opposite ends of the piston, a control device settable for the desired speed of advance of the piston, a signal device responsive to the actual speed of advance of the piston and connections between the control device and the signal device determining said differential pressure to insure maintenance of the speed of advance of the piston at the desired speed.
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