Apparatus for detection of foreign matter in plastic material in spinning room preparation, ginning or the like installation

Abstract

The present invention relates to an apparatus in a spinning room preparation, ginning or the like installation for detection of foreign objects of plastics material, such as polypropylene, weaving plastic, plastic sheet and the like, in or between a stream of fibre material, especially cotton. In the apparatus, the foreign objects in or between the stream of fibre material are arranged to be penetrated by a polarised light source cooperating with a detector, preferably a camera, weak color and / or transparent foreign objects are penetrated, and the light from another light source is applied on the stream of the fibre material. For effectively detecting the white and / or transparent plastic material sheets by a simple structure, the foreign objects in or between the stream of the fibre material are arranged to be illuminated by an ultraviolet light source or reflected light, and the ultraviolet light source cooperates with the detector, wherein the detector is capable of detecting the penetrated and illuminated foreign objects and separating them from the fibre material.

Description

technical field [0001] The invention relates to a device installed in spinning room preparation, cotton ginning etc. for detecting foreign bodies of plastic material such as polypropylene, woven plastic and plastic sheets between or in a flow of fibrous material such as cotton, where Foreign objects between or in materials can be transilluminated (transmitted light) by means of a polarized light source cooperating with a detector device (camera), light colored and / or transparent foreign objects are transilluminated and light from another source reacts on the flow of fibrous material. Background technique [0002] One problem affecting the operation of optically functional foreign fiber and foreign matter separators in spinning room preparation machines for cotton or synthetic fibers is that due to the or packaging fibers), they cannot be detected adequately or at all due to their low optical contrast. [0003] In the case of a known device (EP 0545129B) for detecting polyp...

AI Technical Summary

Problems solved by technology

[0002] One problem affecting the operation of optically functional foreign fiber and foreign matter separators in spinning room preparation machines for cotton or synthetic fibers is that due to the or packaging fibers), their low optical contrast cannot be detected adequately or at all

However, to do so it is necessary to interrupt the movement of the material, the scanning operations occur successively and the roll of silk fiber is progressively advanced

The construction of the device is expensive

It is especially inconvenient to switch lighting systems, transfer material intermittently, and take two images

A further significant disadvantage is that these packaging materials and plastic waste cannot be discerned using transilluminated polarized light, e.g. dense or thick packaging debris cannot be detected

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