COOLING WATER RING DEVICE FOR BLOW-DOWN TYPE FILM BLOWING MACHINE

摘要

A cooling water ring device for a blow-down type film blowing machine comprises an upper cooling water ring (1), an annular upper inner wall (11) is disposed on the upper cooling water ring (1), an annular water reservoir (12) is formed at the periphery of the upper inner wall (11), a water inlet (13) is disposed on the water reservoir (12), a lower cooling water ring (2) is further disposed below the upper cooling water ring (1), the lower cooling water ring (2) comprises an annular lower inner wall (21) and an annular lower outer wall (22), an annular cavity (23) is formed between the annular lower inner wall (21) and the annular lower outer wall (22), the annular cavity (23) is provided with a suction port (26) in communication with the external; the annular lower inner wall (21) assumes a taper shape with a larger upper part and a smaller lower part, a diameter of an upper edge of the annular lower inner wall (21) is equal to a diameter of a lower edge of the annular upper inner wall (11); a wall body of the annular lower inner wall (21) is of a two-layer structure, wherein an outer layer is a metal mesh, an inner layer is an elastic cylinder having multiple pores, and the elastic cylinder leans against the metal mesh. The present invention may improve the cooling speed of bubbles, and avoid the bubbles from falling to deform.