Clamping apparatus for molding machine

A clamping apparatus for a molding machine, comprising:

• a fixed board disposed on a base;
• a movable board disposed on said base, said movable board being movable relative to said fixed board;
• a plurality of mold clamping cylinder devices each having a mold clamping piston with a tie bar insertion hole, said plurality of mold clamping cylinder devices being provided in predetermined positions of one of said fixed board and said movable board;
• a plurality of tie bard disposed on the other of said fixed board and said movable board, each insertable into a respective one of said insertion holes;
• a plurality of half nut connection devices respectively connected to said mold clamping pistons for clamping said tie bars to said one board;
• a mold opening/closing cylinder device for moving said movable board relative to said fixed board;
• and
• a mold thickness adjustment device disposed at an outer position of each of said connection devices for controlling the axial position of each of said tie bars with respect to each of said connection devices during said clamping, said mold thickness adjustment device having a stopper for containing an end of each of the bars, said stopper being movable in the axial direction thereof.