Stretching equipment for polymer composite multilayer material

Abstract

The stretching equipment for the polymer composite multilayer material comprises an upper clamping and fixing device and a lower clamping and fixing device which are used for clamping a base film to be stretched; the upper clamping and fixing device and the lower clamping and fixing device are driven by the two driving wheels with different radiuses respectively, so that fine difference between the tensile strength of the upper layer and the tensile strength of the lower layer is generated when the driving wheels rotate synchronously, and machine vision and a neural network mode are used for judgment, so that the device can be more accurately suitable for stretching of multi-layer materials; the interlayer stress caused by stretching is avoided, the interlayer stress caused by the material is reduced, and the mechanical property of the film is improved.

Description

technical field [0001] The content of the invention belongs to the field of polymer film materials, and in particular, relates to a stretching device for polymer composite multilayer materials. Background technique [0002] The stretching of polymer polyester material is one of the steps of polyester film formation. The quality of the stretching effect directly affects the uniformity, optical properties and mechanical properties of the polyester film. If the stretching is unsuccessful, the film thickness will not meet the standard after the film is formed, or some areas will not meet the standard. Especially for the composite film, it usually consists of film layers with different components, and the film layers have different mechanical properties. Although the internal stress between the film layers is considered when designing the film, this also brings difficulties to the stretching operation. Films with different mechanical properties are stretched at a stretch ratio....

AI Technical Summary

Problems solved by technology

Although the internal stress between the film layers is considered when designing the film, it also brings difficulties to the stretching operation

The film layers with different mechanical properties are stretched at the same stretching ratio. Due to the different response characteristics of the film layers after being stretched, it is easy to cause the film layers to separate after stretching.

[0003] On the other hand, the existing technology usually controls the stretching ratio through the displacement of the stretching equipment, but for multi-layer composite materials, such control is difficult, and the detection of whether the stretching is in place cannot be guaranteed.

[0004] In addition, when using machine vision for inspection, it is usually necessary to use pigments for calibration, which will cause damage to the material

However, other image processing methods that do not use marking points will have insufficient detection accuracy, and are not suitable for online detection on film stretching production lines.

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