Blown film cooling method and device based on air source dynamic distribution

Abstract

The invention discloses a blown film cooling method and device based on air source dynamic distribution. The method comprises the steps that negative pressure is generated through rotation of a distribution fan, cold air is sucked into an annular air cavity, the cold air forms cooling airflow evenly distributed in the circumferential direction at the annular air outlet, the cooling airflow is blown to the surface of a film bubble, and the cooling airflow is evenly distributed from an air source to evenly cool the film bubble. The device comprises an air ring body assembly and a drive assembly. The air ring body assembly comprises air ring outer rings, the distribution fan and an air outlet outer ring, the distribution fan is arranged on the outer side wall of the air outlet outer ring, the air ring outer rings are arranged on the peripheries of the distribution fan and the air outlet outer ring, and the drive assembly drives the air outlet outer ring to drive the distribution fan to rotate. The blown film cooling device can directly replace an air blower and a cooling air ring in traditional equipment, the air blower and the cooling air ring are combined into one, and therefore the size of equipment is reduced, and the cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of cooling for molding and processing of polymer materials, in particular to a method and device for blown film cooling based on dynamic distribution of air source. Background technique [0002] In the plastic film blowing process, the air ring is an indispensable basic component for the formation and cooling of the bubbles in the blow molding process. The uniformity of cooling will have a great impact on the thickness, transparency, surface gloss and physical and mechanical properties of the film. [0003] In the production of extrusion blown film, the traditional external air ring adopts the direct blowing method, and the cold air is blown into the external air ring of the die head of the film blowing machine by a cooling fan to externally cool the film bubble. Its disadvantages are that the wind is uneven and the cooling effect is poor, which leads to uneven film thickness and poor film transparency. In...

AI Technical Summary

Problems solved by technology

Its disadvantages are that the wind is uneven and the cooling effect is poor, resulting in uneven film thickness and poor film transparency.

[0005] In view of the problems of uneven air outlet, poor cooling effect and complex structure in the current cooling air ring, it is of great significance to develop a new blown film cooling method and device.

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