Title of Invention

A METHOD FOR MANUFACTURING OF FIBRE BY SELECTIVELY REMOVING FOREIGN PARS WITH A CLEANING DEVICE OF TEXTILE MACHINE

Abstract

The present invention provides a method for manufacturing of fibre by selectively removing foreign parts. For selective removal of foreign parts (impurities) at an opening (aperture) roll of a textile machine air accumulations are built before an eliminating blade. The air accumulation is built in positions, which corresponda with the positions,at which, seden opposite to the flow ot the material, impurities have been recognised before with tbe help of an electronic device. Various methods towards generation of the air accumulation are shown.

Full Text

The present invention relates to a method for manufacturing of fibre by selectively removing foreign parts with the cleaning device of a textile machine. The Patent Application No. 10 6187 890 included a system for recognition of foreign parts in an opening machine. The foreign parts (impurities) are detected with the help of sensor which control an opening roll axis parallelly. If the foreign parts are detected with the help of the sensors and the evaluating electronic, then one of the valves coupled at the outlet side (subsequently switched on) to the opening machine is automatically controlled and the impurities are removed with good fibres. It is disadvantageous in this regard that relatively many good fibres are removed with the impurities. A machine OP TISCAN, which is described in the DE- 43 30 173, has received widest possible acceptance in the textile industry. Especially since only at the positions, through the width, the fibres are removed at which the impurities are detected. The task of the invention is, to arrange for a removing device which is very simple and which reacts very quickly, which renders it possible to eliminate the impurities selectively an an opening roll. The elimination takes place in the zones arranged axis parallelly to the rolls. These zones correspond with the identification (recognition) spheres which seen in the flow of the material are pre-supported in these zones (extended in front of these zones). If a foreign part is recognised in one of the recognition zones, which is transported from the opening roll at the circumference of the roll, there takes place a signal towards removal in the corresponding zones. The corresponding removal segment can be found at the same opening (aperture) roll a little later in the material flow, or an opening roll which directly takes over the fibres from the opening roll or takes over the fibres material through one or several intermediate rolls from the opening roll, at which the fibres are controlled. The removal takes place with the help of the generation of an air accumulation before an eliminating blade or an eliminating edge. Towards clarification of the process the air conditions at an opening roll are depicted in a simple manner. The opening roll is provided with lathe carrier centre at the circumference. These centres pull the fibre along with. An air film rotates with the opening roll at the surface along with. Towards mechanical elimination of impurities one or several 'blades' are arranged in the short distance from the surface. Large parts cannot pass through between the blade and the roll surface and are elim inated at the blade border. Also no parts, which exist in the periphery of the air film rotating with the roll, are eliminated. In order to hold air film and thereby the fibres at the opening rolls, it is, however, necessary to lead the air film at the roll surface with the help of the baffle plate. The distance between the baffle plate and the opening roll, at the point, at which the baffle plate ends before the next blade, determines how thick the air film around the roll before the next blade is. If the air film is very thick in comparison to the gap, which the blade has for the surface, then much material is eliminated. This is distinctly described in the EP 0110017. This knowledge on the air condition at the aperture (opening) roll is basic for the Invention. The selective elimination through generation of a partial " air accummulation" before an eliminating blade or before an eliminating edge takes place according to the Invention. The fibre material with the foreign part (impurity) is lifted from the centres (T) of the opening roll with the help of the "air accummulation" and are eliminated at the subsequent blade. The Invention is clarified in the following on the basis of accompanying diagrams. Fig. 1 shows the manner of operation of a cleaning machine for textile. Through feed roll(l) fibre material arrive at an opening roll(2). The material at the blades(3) is led by with the help of the opening roll. In order to hold the air cover( shield) on the drum rotating along with, baffle plates(4) are provided with. An arrangement(5) serves the purpose of optical recognition of impurities in the fibre flakes. The fibres are lifted at the end of then- rotation by an air flow (6) from the fitting or with the help of an air- accummulation at the stripper blade(7) separated from the roll and leave the cleaning machine through a suction funnel(8). The eliminated parts arrive in a collection chamber(9) and are conveyed by a suction device 10) from the cleaning machine. The following figures show executions for generation of an " air accummutation" before an eliminating blade as section of Fig. 1. Fig. 2 shows the opening rolls, a blade(3), a baffle plate(4) and a blade(3) following the baffle plate. In order to generate an air-accum mutation (11) before the blade(3) additional air is blown through the nozzles(l2) between the open space between the baffle plate(4) and the blade(3). The additional volume of air cannot pass-through between the blade and the opening roll. The air accum mutates (pile up) before the blade. The air film rotating along with the drum is disturbed and the eddy convey fibres and impurities from the surface of the roll away. Fibres and impurities are further obstructed by the blade(3) from rotating further along with the drum. The nozzles stretch themselves in around axis parallel to the surface of the roll. These are controlled and actuated selectively, corresponding with the impurities recognised through sensors in the zones arranged, with the help of the magnet valve(3). The fibres and the impurities eliminated with the help of the air accummulation and air turbulence react to the waste chamber(9) and are there sucked-off. It is also conceivable to supply (feed) the additional air in the sphere of the baffle plate. Fig. 3 shows the formation of the air accummulation through nozzles which before the chopping-off blade Fig. 4 shows an arrangement of nozzles, at which the nozzles are arranged behind the eliminating blade(3) and blow through between blade and rolls opposite to the direction of rotation, in order to effect the accummulation of air before the blade border. The control of the nozzles takes place as shown in Fig.(2). Fig. 5 shows a further form for generation of air accumulation before the chopping-off blade(4). The end of the baffle plate (4) situated before the elimination blade(3) is supported around a hinge-joint(14) and is moved with the help of an actuating element(l6), for example, a pneumatic cylinder or a magnet. If a foreign part is recognized upstream, the actuating element swings away the end of the baffle plate from the circumference of the opening rolls. The rotating air film follows the baffle plate and tries to fill-up the space originating between the horizontally swivelled baffle plate and the surface. The air film separates itself from the roll surface and pile up (accummulates) itself before the blade. Fibres and impurities lilt off from top of the opening roll and cannot be drawn through any more through narrow slot between the blade and roll surface. They are eliminated (chopped off). Several sectors of the baffle plates to be actuated are arranged through the width of the opening rolls axis parallelly, which correspond with the identifying sensors. Figs. 6 & Fig. 7 show the generation of an air accummulation through change of the geometry of the eliminating blade(3). The eliminating blades stand normally in a flat angle to the surface of the roll. Lifting borders as represented under Fig. 1.7 stand in an angle of 90° to the roll surface.In order to generate an air accummuiation. the geometry of the eliminating blade is changed to around 90° . This takes place in Fig. 6 with the help of shifting of a block (16) parallel to the front of the blade. The block travels somehow compactly up to the blade tip and builds a chopping border of around 90° . The actuation of the block can take place pneumatically or electrically and obviously section-wise. Fig. 7 shows, how the air accummulation can be effected through the swinging of the blade(3). The blade is swung by its normal flat angle around a rotating point at the knife pinch so that an angle of around 90° builds to the roll surface. The swinging can be effected with the help of pneumatic cylinder. With the help of the generation of an air-accumm illation before an eliminating blade it is possible to eliminate simple impurities selectively at an opening roll. WE CLAIM: 1. A method for manufacturing of fibre by selectively removing foreign parts with a cleaning device of a textile machine, comprising the steps of : - feeding the fibre material to an opening roll (2) by a feed roll (1) ; - positioning the fibre material through a blade (3) and a baffle plate (4), said baffle plate provided next to said blade and parallel to the opening roll for holding a air cover on said opening roll; - recognising the impurities in the fibre flakes with the help of an arrangement (5) having a sensor, and providing a signal of optical recognition; - activating a nozzle (12) of a magnetic valve (13) by said signal for blowing additional air between said baffle plate (4) and eliminating blade (3'), thereby generating an air accumulation (11) before said eliminating blade (3'); - lifting the impurities from the opening roll (2) by said air accumulation (11), said impurities being obstructed by the eliminating blade (3') from rotating further along the roll (2) and the impurities landing into the waste chamber (9); - conveying the impurities from the cleaning device with the help of a suction device (1?). 2. The method as claimed in claim 1, wherein the air accumulation is generated at positions which correspond with the position of air accumulation seen in the flow of the material and at those positions where foreign fibres are detected. 3. The method as claimed in claims 1 or 2, wherein the air accumulation is generated at the same opening roll, at which the impurities are detected or at one of the rolls following this roll, to which the fibres are transferred. 4. The method as clained in one of the claims 1 to 3, wherein the air accumulation is generated with the help of the compressed air, which is inducted in a baffle plate, which lies before the eliminating blade. 5. The method as claime in one of claims 1 to 3, wherein towards generation of air accumulation, the compressed air is blown in the sphere between the end of the baffle plate and of the eliminating blade. 6. The method as claimed in one of the claims 1 to 3, wherein towards generation of the air accumulation before the blade compressed air is blown-through between the eliminating blade and roll surface against the direction of rotation of the roll . 7. The method as claimed in one of claims 1 to 3, wherein towards generation of the air accumulation the end of the baffle plate is moved away before the eliminating blade temporarily from the roll surface. 8. The method as claimed in one of claims 1 to 3, wherein towards generation of the air accumulation an additional element is shifted along the blade towards the knife pinch. 9. The method as claimed in one of claims 1 to 3, wherein towards generation of the air accumulation the eliminating blade is swung temporarily against the direction of rotation of the roll . 10. The method as claimed in one of claims 1 to 9 wherein the air accumulation is generated only for maximum five seconds. 11. The method as claimed in one of claims 1 to 10, wherein instead of the baffle plate a blade element is formed-out before the eliminating blade in such a manner that it leads the air film as a baffle plate. The present invention provides a method for manufacturing of fibre by selectively removing foreign parts. For selective removal of foreign parts (impurities) at an opening (aperture) roll of a textile machine air accumulations are built before an eliminating blade. The air accumulation is built in positions, which corresponda with the positions,at which, seden opposite to the flow ot the material, impurities have been recognised before with tbe help of an electronic device. Various methods towards generation of the air accumulation are shown.

Documents:

2011-cal-1996-abstract.pdf

2011-cal-1996-acceptance publication.pdf

2011-cal-1996-claims.pdf

2011-cal-1996-correspondence.pdf

2011-cal-1996-description (complete).pdf

2011-cal-1996-drawings.pdf

2011-cal-1996-examination report.pdf

2011-cal-1996-form 1.pdf

2011-cal-1996-form 2.pdf

2011-cal-1996-form 3.pdf

2011-cal-1996-form 5.pdf

2011-CAL-1996-FORM-27.pdf

2011-cal-1996-pa.pdf

2011-cal-1996-priority document.pdf

2011-cal-1996-reply to examination report.pdf

2011-cal-1996-specification.pdf

2011-cal-1996-translated copy of priority document.pdf