Title of Invention

A SILVER CONTROL DEVICE

Abstract

a coiler plate for depositing a sliver subjected to a tension draft in a sliver coll the coller plate having a rotational axis and comprising: a spatially curved sliver channel having a wall, an inside wall surface, a sliver inlet and sliver outlet, the sliver inlet being arranged substantially coaxial with the rotational axis, and the sliver outlet being arranged at a radial distance and an axial distance from the silver inlet; and a friction reducer, the friction reducer having a drive control for coordinating a tensioning draft upstream from the sliver channel and a movement of a sliver can downstream from the sliver channel such that the sliver is positioned away from at least a portion of the sliver channel inside wall surface, wherein a relative movement exists between the sliver and the inside wall surface of the sliver channel, and the friction reducer facilitates the relative movement by eliminating at least a portion of a frictional resistance acting on the sliver through the inside wall surface.

Full Text

Revolving plate for card sliver depositing equipments specially at drawing frames cards and the equivalent The invention refers to a revolving plate for card sliver depositing equipments specially at drawing frames, cards and the equivalent with a spatially curved sliver passage with an inlet and an outlet for card sliver, in which the inlet is assembled close or coaxially to the rotating axis and the outlet is assembled in radial and axial distance to the inlet, whereon the running card sliver is subjected to a tension drafting through the card sliver, between the running card sliver and the internal wall of sliver passage a relative movement is present, an abrasion resistance affects the internal wall of sliver passage. In the operational practice the card sliver in sliver passage is exposed to multiple number of movement - and force influences. Between delivery rollers and moving cans the card sliver experiences a certain straining draft, a tensile force works through which the card sliver is moved from inlet upto outlet through the sliver passage. Through it, that the outlet is assembled in axial distance to inlet, following the rotational movement in sidewise direction additionally a centrifugal force operates toward outside on the card sliver, which can lead to an undesired wrong draft over a "swelling". The centrifugal force working towards outside is counter acted through reduction of distance of bent sliver passage to the rotational axis that means the "swelling" is reduced wherein the internal wall exerts a counter acting force on the card sliver. The counter acting force brings up an increased friction of stiver materials with the internal wall, through which the sliver running speed is impaired and also wrong drafts caused through friction are not to be excluded. It was proposed to build up a revolving plate for delivery speed of up to 1000 m/min with a bent silver passage out of polished alloy steel. It has however shown that in this way a maintainable increase of sliver running speed about 1000 m/min is not possible Particularly in sensitive drafting slivers high frictional forces against the internal wall lead to undesired wrong drafts. The assignment therefore lies at the base of the invention, to provide a revolving plate of the type described at the entry, which avoids the mentioned disadvantages which makes possible specially an improved tape guide and quality. Thus according to this invention is provided a stiver control device comprising: a cotter plate for depositing a sliver subjected to a tension draft in a silver coil, the coiler plate having a rotational axis and comprising: a spatially curved sliver channel having a wall, an inside wall surface, a sliver inlet and sliver outlet, the sliver inlet being arranged substantially coaxial with the rotational axis, and the silver outlet being arranged at a radial distance and an axial distance from the sliver inlet; and a friction reducer, the friction reducer having a drive control for coordinating a tensioning draft upstream from the sliver channel and a movement of a sliver can downstream from the sliver channel such that the stiver is positioned away from at least a portion of the sliver channel inside wall surface, wherein a relative movement exists between the silver and the inside wall surface of the sliver channel, and the friction reducer facilitates the relative movement by eliminating at least a portion of a frictlonal resistance acting on the silver through the inside wall surface. The measures as per invention considered different movement and force effects from the and on the card silver in the Internal space of sliver passage. The acting forces do not appear at all sides in same proportion. Through it, through change of inter action and/or of spatial allocation between card stiver and internal wall, undesired or rather disturbing forces can be partially and individually counter acted. In this way essentially an improved tape guide and-quality is attained and it makes possible a very remarkable Increase of sliver running speed of about 1000 m/min, particularly in drawing frame. In same measures the improved tape guide as per invention makes possible an improvement of sliver quality also in sliver running speed under 1000 m/mln., particularly in cards. The card sliver is mainly uniform, namely in relation to the draft in it's different sections or rather areas. The part drafts and with it their effect on the section or rather areas of card sliver in sliver passage are uniformly improved and the tension drafting In totality is improved. The advantageous further developments of invention are claimed subsequently. The Invention is explained closer followingly with the help of diagramatically represented execution example. It shows: Fig. 1 Schematic side view of a drawing frame with the revolving plate as per Invention. Fig. 2 Schematic side view of a card with the revolving plate as per Invention. Fig. 3a the revolving plate with sliver passage as per Figure 1 in section. Fig. 3b Side view of sliver passage with card sliver in section. Fig. 3c Plan view on the sliver passage. The side view as per Fig. 1 shows (partly) the inlet area 1, the measurement area 2, the drafting device 3 and the sliver deposit 4 of a drawing frame as for example struetzschier-drawing frame HSR., In inlet area 1 spinning cans (round cans) of a drawing frame with two can rows below the sliver feed table 6 (creel) are assembled and the feed slivers are pulled off over feed rollers and delivered to the drafting device 3. After the passing of drafting device 3, the stretched card sliver gets in a revolving pate 10 of a can cotter and is deposited in rings in the exit can 11. In the revolving plate 10 a sliver passage 12, as for example a bent pipe is assembled through which the card sliver 9 runs through. With A the working direction of the drawing frame is denoted. With 17a, 17b calendar rolls are denoted. Figure 2 shows a card, as for example Truetzschler-high capacity card DK 903, with feed roll, feed table, licker-in, drum, doffing cylinder stripping roller: squeezer rolls, non woven fleece guide item web trumpet, draw box, revolving flat with flat rods, cans 11 and can coiler 20. The direction of rotation of rolls are shown with bent arrows. With B the working direction of the card is denoted. Above the can coiler cover plate a housing is located, in which a rotating revolving plate 10 is located. The can 11 is moved during the filling with card sliver 19 through the revolving plate 10 through a (not represented) drive equipment. In the revolving plate 10 the sliver passage 12 as for example a bent pipe is assembled through which the card sliver 13 runs through. As per Figure 3a the sliver passage 12 is spatially curved and shows an inlet 12a and an outlet 12b for card sliver 9 (see Figure 3b). The inlet 12a is coaxially assembled to the rotational axis 16 and the outlet 12b is assembled in radial distance a and in axial distance b to the outlet 12a. The revolving plate 10 is assembled in an opening of stationary plate 14. The revolving plate 10 shows between the sliver entry opening 12a and the sliver exit opening 12b a tape guide passage 12b, as for example a bent pipe. The sliver exit opening 12b, which is located in the lower revolving top plate shows somewhat an elliptical shape. The card sliver 9 moves in sliver passage 12 in direction of arrow and enters the can 11 through the sliver exit opening 12b (see also Figure 1). With 15a, 15b ball bearings are denoted. The card sliver 9 is subjected to a light tension drafting in sliver passage 12 that means a tensile force Z operates. During entry the sliver card 9 follows the bendings of sliver passage 9. Following these bendings and the tensile force the sliver card 9 exerts in the areas x and y pressure - or rather friction forces P1 and P2 on the internal wall 12c of sliver passage as at the remaining places of internal wall 12. Between the running sliver card and the internal wall 12c a relative movement is present. The friction resistance between sliver card 9 and the internal wall 12c is reduced as per invention through change of interaction and/or the spatial allocation between sliver card 9 and internal wall 12c of sliver passage 12. The "critical" areas x and y of internal wall 12c are therein of substantial meaning. Thus the friction between card sliver 9 and the areas x and y of internal wall 12c can be reduced through reduction of co-efficient of friction µ, through reduction of angle of friction α and/or through enlargement of radius of curvature r. Also the tension draft, which is determined through the draw boxes 17a, 17b and the speed of can 11, can be changed (Tensile force Z). Through these measures individually or in combination the contact force P1 and P2 are reduced. The sliver delivery takes place through the revolving plate 10, which has the assignment, to deposit cycloidal the finisher sliver 9 or rather 13 of sliver building machine in the spinning can 14. The cycloid arises through super imposition of two rotational movements, one quicker, executed through the revolving plate 10 and slower, executed through the can 11 (in the case of rectangular can the second movement is a translation). In the deposit process the sliver in pipe 12 is exposed to different forces. The force of gravity, the centrifugal force, the prestress force act through the operating tension draft as well as the friction force between sliver 9 and pipe internal wall 12c which is oppositely directed to the direction of movement of sliver 9 and through it hampers the deposit process. In order to obtain clean pull-off conditions, the tension draft is so proportioned that the sliver in pipe 12 always lies under some strain. It puts up though here in the curved areas of pipe 12 always at the convex curved, smaller internal radius of each curvature bend. The above mentioned frictional force arises mainly through the interactions between sliver and pipe in this contact zones x and y. The described negative influences on the machine running condition and the sliver quality are determined above all through this friction between the card sliver 9 and the internal wall 12c of the laying pipe 12. For improvement of tape guide in revolving plate 12 following actions are taken up individually or in combined form. Reduction of friction level between the fibre material and the internal surface of tape guide attachment, in which this is layered segmentwise or is executed out of friction poor material. In this way, as for example the tension draft can be decreased and consequently the wrong drafts are reduced. The geometry of tape guide attachment is redesigned in such a way that an unwinding of fibre materials is avoided over the circumference of tape guide attachment. The geometry of tape guide attachment 12 is expanded particularly in inlet area 12a. Consequently as for example the contact of card sliver 9 or rather 10 with the tape guide attachment 12 under the influence of tension is minimised. External forces are brought upon card sliver 9 or rather 10 (as for example through generation of a magnetic or electric field). Through here as for example the friction between fibres and fibre guiding equipment 12c are reduced. The sliver load fluctuations caused through the sliver deposit are equalised through a controlled drive., for example of the can. The tape guide length is reduced through suitable design of revolving plate guide attachment. The tape guide attachment 12 shows other than round execution shapes (as for example elliptical). The measures for reduction of averaging in the tape guide attachments can be applied in drawing frames, cards, combing operations. WE CLAIM: 1. A silver control device comprising: a coiler plate for depositing a sliver subjected to a tension draft in a sliver coil, the coiler plate having a rotational axis and comprising: a spatially curved sliver channel having a wall, an inside wan surface, a sliver inlet and sliver outlet, the sliver inlet being arranged substantially coaxial with the rotational axis, and the sliver outlet being arranged at a radial distance and an axial distance from the sliver inlet; and a friction reducer, the friction reducer having a drive control for coordinating a tensioning draft upstream from the sliver channel and a movement of a sliver can downstream from the sliver channel such that the sliver is positioned away from at least a portion of the sliver channel inside wall surface, wherein a relative movement exists between the sliver and the inside wall surface of the sliver channel, and the friction reducer facilitates the relative movement by eliminating at least a portion of a frictional resistance acting on the sliver through the inside wall surface. 2. The device according to claim 1, wherein a portion of the stiver channel inside wall surface is convex toward a sliver running path, and The portion of the frictional resistance is eliminated by the friction reducer at the convex portion of the sliver channel inside wall surface. 3. The device according to claim 1, wherein a section of the inside waii surface comprises a low friction material, 4. The device according to claim 3, wherein the low friction material comprises a coating. 5. The device according to claim 4, wherein the entire inside watt surface comprises a low friction material. 6. The device according to claim 1, wherein the spatial curve of the sliver channel approximates a curve defined by an unconstrained silver spun about its central axis. 7. The device according to claim 1, wherein the stiver Intel has a cross sectional area greater than a cross sectional area of a central portion of the sliver channel. 8. The device according to claim 1, wherein a portion of the stiver channel is circular in cross section. 9. The device according to claim 1, wherein a portion of the silver channel is elliptical in cross section. 10. The device according to claim 1, wherein a portion of the sliver channel is polygonal in cross section. 11. The device according to claim 1, wherein the sliver outlet has an elliptical cross section. 12. A carding machine comprising the device according to claim 1, 13. A draw frame comprising the device according to claim 1. 14. The device according to claim 1, further comprising a field producer that produces a field, the field being at least one of a magnetic field and an electric field, wherein the field is for acting on the sliver such that the sliver is positioned away from at least a portion of the sliver channel inside wall surface. a coiler plate for depositing a sliver subjected to a tension draft in a sliver coll the coller plate having a rotational axis and comprising: a spatially curved sliver channel having a wall, an inside wall surface, a sliver inlet and sliver outlet, the sliver inlet being arranged substantially coaxial with the rotational axis, and the sliver outlet being arranged at a radial distance and an axial distance from the silver inlet; and a friction reducer, the friction reducer having a drive control for coordinating a tensioning draft upstream from the sliver channel and a movement of a sliver can downstream from the sliver channel such that the sliver is positioned away from at least a portion of the sliver channel inside wall surface, wherein a relative movement exists between the sliver and the inside wall surface of the sliver channel, and the friction reducer facilitates the relative movement by eliminating at least a portion of a frictional resistance acting on the sliver through the inside wall surface.

Documents:

342-CAL-2002-(13-08-2012)-FORM-27.pdf

342-CAL-2002-FORM 27.pdf

342-CAL-2002-FORM-27.pdf

342-cal-2002-granted-abstract.pdf

342-cal-2002-granted-claims.pdf

342-cal-2002-granted-correspondence.pdf

342-cal-2002-granted-description (complete).pdf

342-cal-2002-granted-drawings.pdf

342-cal-2002-granted-examination report.pdf

342-cal-2002-granted-form 1.pdf

342-cal-2002-granted-form 18.pdf

342-cal-2002-granted-form 2.pdf

342-cal-2002-granted-form 26.pdf

342-cal-2002-granted-form 3.pdf

342-cal-2002-granted-form 5.pdf

342-cal-2002-granted-reply to examination report.pdf

342-cal-2002-granted-specification.pdf

342-cal-2002-granted-translated copy of priority document.pdf