US Patent 7112051 Quick clamping device

A quick clamping device includes a main body adapted to be mounted on a mold holder, a clamp piece including first and second arm sections and pivoted to the main body between the first and second arm sections, a wedge body mounted movably on the main body below the second arm section, and a driving unit connected to the wedge body. The first arm section has a press end adapted to clamp a mold unit against the mold holder. The wedge body is movable between a first position, in which the wedge body lifts the second arm section so as to move downward the press end toward the mold unit, and a second position, in which the wedge body moves away from the first position.