The present utility model provides a pipe-penetrating upright post for a mold clamping device, a mold clamping device and an injection blow molding machine, comprising a cylindrical solid upright post body. Four through cylindrical long through holes are formed in the solid upright post body, the axes of the four long through holes are parallel to the axis of the solid upright post body, and internal threads are provided at the orifices of the through holes for connecting pipe joints. The present utility model drills four oil passage holes in the solid upright post as transition oil passages, avoiding damage caused by mutual friction due to direct contact of rubber hoses, and realizing neat and clear oil passage arrangement. Meanwhile, the solid upright post has a larger stress area, making the mold locking of the equipment more stable and reliable.

Country Code: CN

Application Number: CN202023314451.2