B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/67 (2006.01)
Patent
CA 2133794
ABSTRACT OF THE DISCLOSURE A mold closing unit for an injection molding machine includes a movable mold carrier cooperating with a stationary mold carrier; a first piston slidably received in a first hydraulic cylinder and dividing it into a high-pressure chamber and a low-pressure chamber which are connectable to one another by a transfer channel; a first piston rod connecting the first piston with the movable mold carrier for applying a holding pressure to the closed mold; a second piston slidably received in a second hydraulic cylinder; a second piston rod connecting the second piston with the movable mold carrier for applying thereto a shifting force for movement relative to the stationary mold carrier; a valve opening or closing the transfer channel; and first and second work chambers connected to the valve for applying thereto a valve opening and a valve closing motion, respectively. The second hydraulic cylinder or the conduit which supplies the second hydraulic cylinder with pressurized hydraulic fluid is in open communication with the first work chamber.
Hehl Karl
Macrae & Co.
LandOfFree
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