Measuring and testing – Sampler – sample handling – etc. – Conveyor coacting
Patent
1991-12-20
1994-03-22
Noland, Tom
Measuring and testing
Sampler, sample handling, etc.
Conveyor coacting
73160, 73159, 356429, G01N 3336
Patent
active
052954013
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a method for the random-sample analysis of textile fiber strands.
BACKGROUND OF THE INVENTION
In the sense of the method of the invention, the term "fiber strands" is used to include both ordered and irregular strands of textile single fibers (slivers) and furthermore also webs.
It is known in the textile industry to use mechanical or capacitive sensors to monitor automatically mass fluctuations of continuously moving fiber strands or slivers for purposes of quality control. On the other hand, foreign particles and foreign fibers are measured manually by a lab technician who randomly pulls apart slivers on a luminous table and visually searches for foreign particles and counts them. The properties of the individual fibers cannot be measured at all, and therefore it is impossible to ascertain changes in parameters (for instance length, crimping) caused by processing conditions.
SUMMARY OF THE INVENTION
An object of the invention is improvement of the methods. It is the object of the invention to create a method for the random sampling of textile strands allowing non-destructive analysis of the moving fiber strand.
Essentially the advantages of the invention are that by means of its method, it is possible to carry out "on-line" analysis by randomly sampling the moving fiber strand (for instance a card sliver) without residually damaging the fiber strand.
Further advantages are automated analysis of foreign particles and detecting changes in length due to processing conditions. These values also may be used to optimize the previous processing. The routinely occurring doubling of the slivers arising in such processing may be monitored and controlled, so that the values of the fiber parameters, and thereby also yarn quality, remain constant.
BRIEF DESCRIPTION OF THE DRAWINGS
An illustrative implementation of the invention which at the same time elucidates the principle of operation is shown in the drawings and described comprehensively below. In the drawings,
FIG. 1 schematically shows apparatus with which to carry out the method of the invention,
FIG. 2 schematically shows the means of the invention in the apparatus of FIG. 1 for flattening the fiber strands prior to its actuation,
FIG. 3 schematically shows the means of the invention of the apparatus of FIG. 1 for flattening the fiber strands after a sliver has been seized;
FIG. 4 schematically shows the fiber-strand flattening means of the equipment of the invention of FIG. 1 after the sliver has been drawn apart,
FIG. 5 is a variation of the detailed FIG. 4 at the time of measurement,
FIG. 6 shows typical interfering particles in a cotton web which can be analyzed by the method of the invention, and
FIG. 7 shows a plurality of centrally controlled apparatus in accordance with the invention to simultaneously and randomly analyze several textile fiber strands employing different analyses.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The measurement instrumentation 7 shown in FIG. 1 used to carry out the method of the invention essentially comprises fiber transporting means 25, 4, 28, 27, fiber strand retaining or damming means 5,6, fiber strand leveling means 3; and a textile measuring apparatus 26. The instrumentation 7 can be connected directly, on-line to the output of a unit 1 producing a fiber strand or sliver 2 such as a stretching device, a card or a combing means.
The fiber strand 2 entering the measurement instrumentation 7 on the left at a speed between 8 and 120 m/min passes between two pairs of cooperating rolls 25, 25; 4,4 and arrives in the region of the textile measuring apparatus 26 and finally, after passing between two cooperating pairs of rolls 28, 28; 27, 27 mounted a distance of 0.1 to 1.0 m apart, leaves the measurement instrumentation 7 in the longitudinal direction 23. Preferably the material, surface, size and drive and control by electric motor of the pairs of rolls corresponds to those of standard stretching equipment.
By briefly stopping the pairs of rolls 4 and 28 while the
REFERENCES:
patent: 3333467 (1967-08-01), Hoskins
patent: 3377852 (1968-04-01), Leistra
patent: 3669552 (1972-06-01), Briscoe
patent: 3795906 (1974-03-01), Erbstein
patent: 4058962 (1977-11-01), Spescha et al.
patent: 4295252 (1981-10-01), Robinson et al.
patent: 4791812 (1988-12-01), Kirby et al.
patent: 4827781 (1989-05-01), Vollm
Farley Walter C.
Noland Tom
Siegfried Peyer AG
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