Mold clamping for injection blow molding

Details Mold clamping for injection blow molding Mold clamping for injection blow molding

B - Operations, Transporting

29

F

18/707

B29F 1/00 (1980.01)

Patent

CA 1069663

MOLD CLAMPING FOR INJECTION BLOW MOLDING ABSTRACT OF THE DISCLOSURE This invention is an improved injection molding ap- paratus, and more specifically an injection blow molding machine. An injection mold and/or other molds have a movable part that is moved toward and from a fixed part to open and close the mold. Hydraulic motors supplied with high pressure liquid holds the molds closed. In order to conserve high pressure liquid, a small motor is used to open and close the molds and to move a piston of the high pressure hydraulic motor. Liquid under little or no pres- sure is drawn into the hydraulic motors as they are moved by the small motor. When the molds reach closed position, communication of the hydraulic motors with the low pressure liquid supply is cut off, and high pressure liquid is supplied to the hydraulic motors. The preferred construction has all of the movable parts of the molds connected with a frame. Special motion-transmitting means maintain the frame against tilting. -1-

238391

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