Ware is reserved to pipeline preformed hole

The utility model provides a ware is reserved to pipeline preformed hole, includes the centre form of tubbiness and the external mold of tube -shape, the outer wall of centre form and the contact of the inner wall of external mold, and the contact surface is the conical surface. The centre form includes staving and gim peg, install the end cover on the staving top end opening, open at the end cover center has the intercommunicating pore, staving bottom center is provided with the screw hole, gim peg bottom is provided with the self tapping screw head, and the top level is provided with the anchorage bar, the gim peg bottom is passed the intercommunicating pore and is passed through threaded connection with the screw hole. Ware is reserved to pipeline preformed hole makes the centre form strut the external mold through the contact surface of the conical surface, and after the completion of moulding plastics, the centre form contracts in taking out and making the external mold, and directly will reserve the war