The invention relates to a needle valve mechanism in an injection blow molding machine, comprising a frame, a flow guide seat base plate and an oil cylinder support plate are sequentially arranged on the frame from front to back, a flow guide seat is arranged on the flow guide seat base plate, a nozzle is arranged at the front end of the flow guide seat, a small hole is arranged at the front end of the nozzle, a needle valve is movably arranged in the flow guide seat, the front end of the needle valve extends into the nozzle, the tail end of the needle valve extends out of the flow guide seat, the top end of the needle valve is matched with the small hole, an oil cylinder is arranged on the side wall of the oil cylinder support plate, the oil cylinder comprises a cylinder body and an oil cylinder shaft, the center lines of the oil cylinder shaft, the needle valve and the small hole are on the same horizontal line, the tail end of the oil cylinder shaft is movably arranged in the cylinder body, the front end of the oil cylinder shaft extends out of the cylinder body and is connected with the tail end of the needle valve. The invention has simple structure, low cost and convenient operation, and is not easy to cause material blockage and wire drawing during filling.

Country Code: CN

Application Number: CN201310451827.X