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Method and device for removing foreign matters from a fibre material, in particular from raw cotton

A technology of fiber materials and fibers, which is applied in the field of separating impurities in fiber materials, especially raw cotton, and can solve problems such as the disturbance of impurities in the separation container

Inactive Publication Date: 2007-11-21
USTER TECHNOLOGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem with this known method is that the compressed air pulse at the moment of separation blows a large amount of air into the separation vessel in a short time
However, the suction effect at the moment of separation causes the impurities in the separation container to be disturbed, so the impurities still have to be discharged from the separation container through the gate often

Method used

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  • Method and device for removing foreign matters from a fibre material, in particular from raw cotton
  • Method and device for removing foreign matters from a fibre material, in particular from raw cotton
  • Method and device for removing foreign matters from a fibre material, in particular from raw cotton

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Embodiment Construction

[0019] As shown in Figures 1 and 2, the device generally indicated at 1 comprises a fiber conveying channel 2 in which cotton fibers or sheets are conveyed in loose form. This device is integrated in the blowroom production line in a manner known per se, for example arranged downstream of the bale opener or downstream of the carding machine. Pneumatic conveying devices are well known in the art and are not shown here in detail. In this embodiment, the cotton fibers pass through the sensor device or the separating device from bottom to top but obliquely relative to the vertical direction. However, the direction can be changed arbitrarily. In the dirt detection zone or in the separation zone, the fiber feed channel 2 has a rectangular cross-section, which then transitions into a circular or other shaped cross-section.

[0020] The sensor arrangement consists of two cameras such as CCD cameras 3, 3' in a known manner, the optical axes of which are aligned with the fiber feed ch...

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PUM

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Abstract

A sensor system (3, 3') for detecting foreign matters and a separation device (4) provided with at least one compressed air nozzle (5) which is perpendicular to a pneumatic fibre conveying conduit are successively mounted in a direction of conveyance (a), wherein said fibre conveying conduit is provided with a removing opening (6) arranged in front of the compressed air nozzle. Contrary to state of the art of actual methods and devices, the foreign matters are not removed to a substantially pressure-tight separation container. According to said invention, the removing opening (6) is connected to a derivation (7, 10) in which a permanent airflow (d, e) for transporting separated foreign matters away is maintained.

Description

technical field [0001] The invention relates to a method according to the preamble of claim 1 for separating impurities in fibrous material, in particular raw cotton. Background technique [0002] This method is used, for example, in cleaning plants to prepare raw cotton for spinning. In this case, foreign fibers such as twine, flakes, etc., but also plastic films and the like are sorted out as early as possible after opening the cotton bales. Whereas in the past this part of the dirt was diverted into the separation container by means of deflection guides or preselectors, today the separation is only accomplished by means of compressed air pulses directed transversely to the fiber conveying channel. [0003] The problem with this known method is that the compressed air pulse at the moment of separation blows a large amount of air into the separation vessel in a short time. The danger then arises that impurities already present in the separating container are blown up by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01G31/00
CPCD01G31/003
Inventor A·于尔根斯A·迈耶霍夫C·安德雷格
Owner USTER TECHNOLOGIES