Device and method for controlling flatness of full-width composite material

Abstract

The invention discloses a device and a method for controlling the flatness of a full-width composite material. The device for controlling the flatness of the full-width composite material comprises a thickness gauge, a probe mounting rack, an extruder, a flatness adjusting mechanism, a PLC (programmable logic controller) and a thin film conveying mechanism, wherein a probe of the thickness gauge is arranged on the surface of extrusion composite films through the probe mounting rack; the flatness adjusting mechanism is arranged on the extruder; the flatness adjusting mechanism, the thickness gauge and the extruder are electrically connected with the PLC respectively; the extrusion composite films are conveyed by the thin film conveying mechanism; a die head of the extruder is arranged above the thin film conveying mechanism. The method for controlling the flatness of the full-width composite material comprises the step as follows: thickness uniformity adjustment of a horizontal cross section of each extrusion composite film, thickness uniformity adjustment of a longitudinal cross section of each extrusion composite film and surface flatness adjustment of the stacked extrusion composite films are performed integrally. According to the device and the method, integrated control of the thickness uniformity adjustment of the horizontal cross section of each extrusion composite film, the thickness uniformity adjustment of the longitudinal cross section of each extrusion composite film and the surface flatness adjustment of the stacked extrusion composite films can be realized, and the product quality is effectively improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing flexible packaging materials, in particular to a flatness control device and method for full-width composite materials. Background technique [0002] For extruded composite packaging materials, the thickness uniformity and flatness control of the extruded composite film is one of the key indicators affecting the performance and cost of the packaging material, but in high-speed production, the average error of manual control of the thickness uniformity of the extruded film is in More than 10%, which is far from meeting the requirements of composite packaging materials. [0003] For extruded composite films, the thickness uniformity of the transverse section, the thickness uniformity of the longitudinal section, and the surface uniformity of the extruded composite film after stacking or curling all affect the quality of the final product. [0004] At present, the extrusion compounding equipme...

AI Technical Summary

Problems solved by technology

In actual production, this method has the following defects: 1. When running at a certain line speed, the speed of the open-loop control motor of the frequency converter cannot be adjusted completely according to the same proportional relationship, resulting in a large deviation in the longitudinal thickness of the film; 2. The composite line speed When speeding up and down, the time is short and the change is large, and the speed of the open-loop control motor of the frequency converter cannot be adjusted according to the same proportional relationship, resulting in a large deviation in the longitudinal thickness of the film

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