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Device in spinning room preparaed for detecting foreign bodies made of plastics, such as polypropylene tapes, fabrics and films and the like

A technology of polypropylene tape and foreign matter, which is applied in the field of devices in spinning workshops, and can solve problems such as large machines, low optical contrast, and separators that cannot be detected

Active Publication Date: 2012-07-04
TRUETZSCHLER GRP SE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In spinning room preparation machines for cotton or synthetic fibres, problems arise during the optical operation of the foreign fiber and foreign matter separator: due to the low optical contrast, the separator cannot detect or only detects shallow Colored, colorless or transparent plastics (e.g. wrapping film or wrapping fabric made of polyethylene or polypropylene)
It has been found disadvantageous that, due to mutual influence, this setup cannot be combined in one inspection station with typical color detection or methods using polarized transmitted light
The setting of another inspection station in the machine is also limited because a minimum distance must be kept between the inspection stations to exclude mutual interference, the machine would become too large, or the distance between the inspection station and the separation station Becomes too large so foreign matter cannot be separated or too much good material is separated at the same time

Method used

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  • Device in spinning room preparaed for detecting foreign bodies made of plastics, such as polypropylene tapes, fabrics and films and the like
  • Device in spinning room preparaed for detecting foreign bodies made of plastics, such as polypropylene tapes, fabrics and films and the like
  • Device in spinning room preparaed for detecting foreign bodies made of plastics, such as polypropylene tapes, fabrics and films and the like

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Embodiment Construction

[0020] figure 1 A test channel 1 with a transparent wall 3 is shown in the test region 2 , through which the fiber bundles 4 to be tested and foreign bodies 5 flow. Two cameras 6 (one on each side) are pointed into the tunnel and encounter a material-coloured background plate 7 on the respective other side. For the illumination, for example a light emitting tube 8 is used, which emits white unpolarized light in the visible wavelength range. Another luminous tube 9 illuminates the background plate 7 . The light reflected by the fiber tuft 4 or the foreign object 5 is received by a camera 6 and analyzed by an evaluator 10 for brightness and color. It is preferred here that the cameras are able to receive light in the red, green or blue wavelength range of the channel and further process it separately, but in simple cases black / white cameras can also be used if their sensitivity For example if limited to the visible part of the spectrum by using filters.

[0021] Using one or...

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Abstract

The invention relates to a device in a spinning room preparaed for detecting foreign bodies made of plastics, such as polypropylene tapes, fabrics and films and the like, in or between fibre tufts, for example of cotton, in particular for detecting in fibre materials those packaging materials and waste plastics which are not detectable using polarised light (non-transparent) or detectable using UV light (non-fluorescent), by illuminating the fibre material on the one hand with non-polarised light of one wavelength range and at the same time with polarised light of a different wavelength range in such a way that both kinds of light can be used together in one machine at closely adjacent inspection stations.

Description

technical field [0001] The invention relates to a device in a spinning mill prepared for the detection of foreign bodies made of plastic, such as polypropylene tapes, fabrics and films, etc., in or between fiber tufts (eg cotton). Background technique [0002] In spinning room preparation machines for cotton or synthetic fibres, problems arise during the optical operation of the foreign fiber and foreign matter separator: due to the low optical contrast, the separator cannot detect or only detects shallow Colored, colorless or transparent plastics (such as wrapping film or wrapping fabric made of polyethylene or polypropylene). [0003] DE102008031199A discloses the simultaneous use of polarized light (transmitted light) in combination with UV light radiation (incident light). [0004] DE 10347240 A already discloses a method for determining and evaluating the surface gloss of foreign objects for detection by means of polarized incident light. It has been found to be disad...

Claims

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Application Information

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IPC IPC(8): D01G31/00
CPCG01N21/8901G01N2021/8845G01N21/21G01N21/8915D01G31/003G01N21/892G01N21/94
Inventor G·恩格斯
Owner TRUETZSCHLER GRP SE
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