An air-cooled blow pin assembly belongs to the technical field of air blowing devices for blow molding machines. It comprises a blow pin body formed with a hollow cavity, an air inlet pipe fitting joint extending from one end of the blow pin body, a cooling air inlet arranged on the side, a blow pipe fitting seat formed on the cavity wall of the hollow cavity, an annular air groove arranged at the other end of the blow pin body and a cooling sleeve fixed thereto, and a group of cooling sleeve cooling air holes arranged on the inner wall of the hollow cavity. A blow pin head is formed with a blow pin head cavity, and a group of heat dissipation fins are formed on the inner wall of the blow pin head cavity. A blow pipe is arranged in the hollow cavity, one end of which extends out of the blow pin head and forms a blow pin cap, and a group of secondary air injection holes are arranged on the blow pin cap. The gap between the outer wall of the blow pipe and the inner wall of the hollow cavity forms a cooling air guiding cavity, the cooling air inlet communicates with the cooling air guiding cavity, and the cooling sleeve cooling air holes communicate with the cooling air guiding cavity. Advantages: no pollution to products; shortened parison inflation time and improved production efficiency; enhanced heat dissipation effect.
Country Code: CH
Application Number: CN201210333588.3
