Bubble shape stability monitoring device of film blowing equipment

Abstract

The invention relates to a bubble shape stability monitoring device of film blowing equipment. The bubble shape stability monitoring device is characterized by comprising a sliding block fixing framefixedly connected with the bottom of a three-layer platform of the film blowing equipment, wherein a sliding block is fixedly installed at the bottom of the sliding block fixing frame, a sliding railis installed on the sliding block in a movable fit mode, and the sliding rail moves front and back along the sliding block; and one end of the sliding rail is fixedly connected with a bubble shape real-time distance measuring instrument through a fastener, and the bubble shape real-time distance measuring instrument is connected to a central controller of the film blowing equipment through a signal line. The bubble shape stability monitoring device has the advantages that the distance of the bubble shape real-time distance measuring instrument can be adjusted according to different film widths, the phenomenon of adjustment lag in the prior art is avoided, adjustment is pertinent, and the film bubble diameter control precision is relatively high; the bubble shape real-time distance measuring instrument can monitor the size of a film bubble in real time, and real-time accurate adjustment is facilitated; and therefore, the accurate air supply quantity of a fan is realized, and the film quality is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of bubble shape stability monitoring for plastic film blowing equipment, in particular to a bubble shape stability monitoring device for blown film equipment. Background technique [0002] In the actual production process of the plastic film blowing unit, the film blank is extruded through a circular die, and then the inside of the film blank is blown by high-pressure wind, and the outside is shaped into a film bubble of uniform thickness by cooling air. Under the action of the machine, it enters the foam stabilizing device, the herringbone plate device, the traction device in turn, and then passes through the guide roller device and the coiling device, and finally makes a film roll. In the process of the thin bubble being pulled, the film bubble is continuously pulled upwards, and enters the pulling roller from the herringbone plate, and at the same time, the high-pressure air inside the film bubble is even...

AI Technical Summary

Problems solved by technology

Since the bubble shape changes frequently, the readings of the monitoring system will also change, and a fixed value cannot be formed, resulting in unstable data and uneven film width.

Using the above-mentioned monitoring method causes the bubble diameter to change within a certain range, and it often takes many operations to achieve the required bubble diameter, which has obvious hysteresis and poor control accuracy. For inexperienced technicians Said, the difficulty of control and operation is high, which is the deficiency of the existing technology

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