APPARATUS FOR WORKING PIN IN HOLE AS-CAST

摘要

PURPOSE:To enable exchange of a pin in hole as-cast under condition of sticking a cylinder unit to a die by forming a through hole in axial direction on a piston rod in the cylinder unit fitted to the die and inserting the pin in hole as-cast as exchangeable through opening at rear end of the through hole. CONSTITUTION:When the pin 15 in hole as-cast is broken after shotting at many times, a nut 16 screwed on the rear end of the through hole 14 in the piston rod 12 is released and a part of the pin 15 in hole as-cast remaining in the piston rod 12 or in the fixed die 1 or the fixed core 2 is pulled out. Then, when the tip part, etc., of the pin 15 in hole as-cast remains in cavity, by opening the dies, this is taken out. After that, the new pin 15 in hole as-cast is inserted from the opening at the rear end of the through hole 14 in the piston rod 12 and fixed by tightening the nut 16. Therefore, the exchanging time of the pin in hole as-cast is shortened. Further, when the pin in hole as-cast is made hollow and inserting a cooling pipe in the inner part, rigidity of the pin comes to high and the service life is extended and further, smoothness of sliding part in the pin is improved.