Mold clamping apparatus for injection molding machine

A mold clamping apparatus for an injection molding machine, for closing and opening a mold including a stationary mold and a movable mold and for clamping the closed mold, said mold clamping apparatus comprising:

• a stationary platen fixedly holding the stationary mold;
• a movable platen fixedly holding the movable mold and disposed opposite to the stationary platen;
• tie bars for connecting the movable platen to the stationary platen in a manner that the movable platen moves toward and away from the stationary platen;
• a movable platen driving means for moving the movable platen along the tie bars to close and open the mold;
• a rear mount plate disposed behind the movable platen and connected to the tie bars;
• a mold clamping ram extended between the rear mount plate and the movable platen to exert a mold clamping force on the movable platen;
• and
• a clamping force applying means having a sealed hydraulic cylinder actuator capable of converting energy of a hydraulic fluid into an intensified mold clamping force and of applying the intensified mold clamping force to the mold clamping ram.

A mold clamping apparatus for an injection molding machine, for closing and opening a mold including a stationary mold and a movable mold and for clamping the closed mold, said mold clamping apparatus comprising:

• a stationary platen fixedly holding the stationary mold;
• a movable platen fixedly holding the movable mold and disposed opposite to the stationary platen;
• tie bars for connecting the movable platen in a manner that the movable platen moves toward and away from the stationary platen;
• an intermediate mount plate disposed behind the movable platen and movable along the tie bars;
• a rear mount plate fixedly disposed behind the intermediate mount plate;
• toggle mechanisms interconnecting the intermediate mount plate and the rear mount plate to move the intermediate mount plate forward and backward along the tie bars;
• a mold clamping ram extended between the intermediate plate and the movable platen to exert a mold clamping force on the movable platen;
• and
• a clamping force applying means having a sealed hydraulic cylinder actuator capable of converting energy of a hydraulic fluid into an intensified mold clamping force and of applying the intensified mold clamping force to the mold clamping ram.