Down blowing water cooling extruder water ring device

Abstract

The invention provides a water ring device of a down-blowing water-cooling extruder. The water ring device comprises a water ring, a purified water inlet and a purified water outlet, wherein the water ring comprises an annular outer wall, an annular inner wall and a bottom surface, the purified water inlet and the purified water outlet are formed in the annular outer wall of the water ring. The water ring device is characterized in that an air conditioner coiler is arranged in the water ring, the air conditioner coiler is provided with two ports, namely an outlet end and an inlet end, the air conditioner coiler is provided with an air conditioner, the outlet end of the air conditioner coiler is connected with a compressor of the air conditioner, the inlet end of the air conditioner coiler is connected with a throttling valve of the air conditioner, and a refrigerant is filled in the air conditioner coiler. The cooling effect of the upper part of the water ring is enhanced to ensure that the temperature of purified water in the water ring is uniform, the lower temperature value is kept, the transparency of a membrane is enhanced, the qualified rate of a produced membrane is increased, the manufacturing cost and the running cost are low, and the convenience is facilitated.

Description

technical field [0001] The invention belongs to the technical field of blown film forming, and relates to an improvement of a cooling device for a plastic film extruder, in particular to a water ring device for a down-blown water-cooled extruder. Background technique [0002] The basic production process of the plastic film blown water-cooled extruder is as follows: the plastic particles are melted by the extruder, filled with clean compressed air in the middle, extruded at the film head, the lower outer wall of the film head is covered with a cooling water ring, and the molten state The plastic is blown down and cooled by the water ring to form, and reaches the first traction through the herringbone board, and then becomes a film after a series of traction, stretching, drying, static removal, and winding. [0003] During the production process, the water temperature of the water ring determines the cooling effect and directly affects the transparency of the film. Usually t...

AI Technical Summary

Problems solved by technology

Usually the purified water in the water ring is cooled by the ice water machine, and the temperature is about 7°C when it comes out of the ice water machine. However, in summer, due to the loss of the workshop pipeline and the change of the ambient temperature, the temperature has already reached the lower part of the water ring. When it reaches about 14 degrees, the membrane head continuously releases heat during the molding process, so the purified water needs to be replenished continuously. Since the upper part of the water ring has a large contact area with the membrane head body, the water temperature in the water ring is constant from the lower part to the upper part. If the temperature is increased, the temperature of the purified water directly connected to the membrane head is close to 20°C, so its cooling effect is greatly reduced, which will have a negative impact on the transparency of the membrane.

For a long time, this problem has been perplexing those skilled in the art. However, a technical solution with good cooling effect, low operating cost and easy implementation has not been found so far.

Images