Title of Invention

DEVICE AT A CARD FOR COVERING OF LIGHT FIBRE WASTE LIKE SHORT FIBRE, DUST, FIBRE FRANGMENTS, FLY AND THE LIKE

Abstract

A carding machine (CM) comprising: (e) clothed rolls (5) for processing and carrying fiber material thereon; (f) means for (9) separating lightweight waste from the fiber material processed by the clothed rolls (5); (g) a conduit (9c) for receiving the lightweight waste; (h) air stream generating means (23) for generating an air flow in said conduit (9c) for removing the lightweight waste; (i) adjusting means (4a,4b) for varying a degree of carding intensity of said carding machine(CM); (j) detecting means (MD) for measuring quantities of the light-weight waste produced at a respective degree of carding intensity; (k) a carding machine outlet (18), said conduit (9c) extending from said carding machine outset; and (I) a pair of crushing rolls (7,8) and a sliver trumpet (10) through which the fiber material consecutively passes, said conduit (18) extending from between said crushing rolls (7,8) and said sliver trumpet (10).

Full Text

Device at a card for covering of light fibre waste like short fibre, dust, fibre fragments, fly and the like The invention refers to a device at a card for covering of light fibre waste like short fibre, dust, fibre fragment, fly and the like which is released in the processing of fibre materials with a trimmed roller, in which in cross section of a suction line at least one filter area is present. In a known device (DE 3429024) it is provided to measure the dust- and dirt content of a fibre material. The fibre material is supplied over a feed device of a release roller, which shows a dust separation opening with a strainer type surface, to which a filter unit is connected, which shows in suction direction one after the other a strainer for short fibres and fly and a dust filter. As per carried out test through measurement the arisen amount of dust (at dust filter) and short fibres (at strainer) can be found out. A disadvantage exists therein that the degree of opening of release roller is constant. Besides, it disturbs that measurement and evaluation take place discontinuously, which is expensive apparatus wise. The assignment lies therefore at the base of the invention to procure a device mentioned at the entry which avoids the mentioned disadvantages, which makes possible in particular a continuous determination of fibre damage through carding at a card. The solution of this assignment takes place through the distinguished features of claim 1. Through the measures as per invention, it is possible to determine the fibre damage of carded fibre material continuously (on line). A special advantage lies therein that in a definite carding - over the amount in fibre waste - the fibre damage determined with measurement values can be compared for the fibre damage with gentle carding and with damaging carding and in this way an optimum setting of carding can take place. The claims 2 to 26 have advantageous further development of invention in content. The invention is explained closer followingly with the help of an execution example represented diagramitically. Fig. 1 Schematic side view of a card for the device as per invention. Fig.2 The area of non woven fleece acceptance of the card with suction device for light fibre waste. Fig.3a Side view of a measurement equipment for light fibre waste. Fig.3b rotatable filter disc of the measuring instrument. Fig.3c Dependence of difference pressure from the carding setting. Fig.4a Sideview of the flexible arch and moving cover with movable wedge shaped slide way and cover rods in a first position. Fig.4b The device as per Fig.4a, with slidway shifted in direction A and cover rods shifted radially in direction E. Fig. 5 A shifting equipment for the slide way and preset equipment. Fig. 6 Block diagram of an electronic control - and regulating equipment. Fig.l Shows a card, as for example Truetzschler high capacity card DK 903, with feed roller 1, feed table 2, lickers in 3a, 3b, 3c drum 4, accepter 5, stripper roller 6, squeeze roller 7, 8, non -woven fleece guide item 9, pile funnel 10, withdrawal roller 11, 12, moving cover 13 with cover rods 14, can 15 and can stock 16. The direction of rotation of rollers are shown with bent arrows. With M the middle point (axis) of drum 4 is denoted. 4b gives the direction of rotation of drum 4. With K the working direction is given. As per Figure 2 the non woven fleece guide item 9 as for example Truetzschler WEBSPEED shows a prefunnel 9a to which a non woven fleece support item 9b is prelaid. Between the prefunnel 9a and the pile funnel 10 an air gap is present through which lighter fibre waste come out, which is sucked up wards over a suction equipment 9c as for example suction pipe, hose or the like. The fibre material F is taken out through the stipper roller 6 by the accepter 5 and turns out over a guiding item 19 through the roller gap between the squeeze rollers 7, 8, supported through the non woven fleece support item 9b in the entry opening of pre funnel 9a, runs through the pre funnel 9a and enters over the pile funnel through, from which it is withdrawn through the withdrawal rollers 11, 12 as fibre sliver. At the area above of fibre materials F between the roller gap of squeeze roller 7,8 and the entry in the pre funnel 9a a further suction equipment 18, for example pipe, hose or the like is connected. The measuring equipment 19 for light fibre waste G covers a close pipe as for example a hose 20, at whose one end a tube distributing guide 21 with a swinging end valve 22 and ot other end a suction source, as for example a ventilator 23 are located. The hose 20 is crossed by a filter disc 24, which is driven rotatably axis parallel to the hose axis around an axis 36 a by a motor 36. The filter disc 24 shows a filter medium 25, which allows the entry of suction air, however would hold back the light fibre waste G on the filter surface 25 in hose. Through rotation in direction of arrow C the filter surface gets in corresponding to Fig 30 out of the position 25' in hose 20 in a cleaning position 25" outside of hose 20 opposite to a cleaning equipment 37 as for example suction equipment. In the internal space of hose 20 before and behind the filter disc 24 in each case a pressure sensor 37a or rather 37b is present, which determines over a difference pressure instrument 38 the difference pressure before and behind the filter surface 25'. The difference pressure measuring instrument 38 is connected to an electronic control- and regulating equipment 33 (see Fig. 6) in which in a storage the relation between the difference pressures and the amount of light fibre waste G located on the filter surface 25' is input. In preset reference pressure difference the motor 36 sets the filter disc 24 in motion so that a free filter surface from light fibre waste 4 gets in the cross section of hose 20. The further rotation of filter disc 24 can also take place as per a present reference time, the air flow with the light fibre waste is denoted with D. The exit of pipe distributing guide 21 is connected over a pipe 39 to the sucked filter equipment of the card. In the Fig. 4a and 4b the shifting of slide way 30 on the flexible arch 17 in direction of arrow A is represented. Through the shifting as for example around 50mm the distance between the cover set and the drum set 4a, that means the distance between the peak circles, is enlarged. Through it, that the slide way 30 is shifted in direction A, the cover rods 14 are lifted from the position in direction E Shown in Fig. 4a in the position shown in Fig. 4b. The cover rods 14 are moved between the cover deflecting roller 13a and the cover deflecting roller 13b through a drive belt (not represented), followingly deflected and then led back again on the opposite side. With r3 the radius of convex external surface 17a of flexible arch 17, with r4 the radius of concave internal surface 20b of slide way is denoted. The cover deflector rollers 13a, 13b circulate in direction of arrow H or rather I. In the Figure 4a and 4b the Truetzschler - precision cover setting system PFS is represented. As per Fig.5 at the slide way 30 a carry item 26 is brought up, which is combined with a gear rack 27a in which a rotatable tooth gear 27b in direction O.P. engages which is driven by a drive equipment 28, as for example a reversible motor through which the slide way 30 in direction of arrow A, B is movable. At the drive equipment 28 a preset equipment 29 is connected with which a desired narrow carding gap a3, as for example 3/1000" can be preset (reference value). The setting can also take place through an electronic control and regulating equipment 33 (see Fig.6) with reference value storage and/or input equipment. In narrower (Smaller)_ carding gap corresponding to the adjustment as per Fig. 4a a damaging (aggressive) carding with increased shares at light fibre waste G takes place. Reverse in wider (larger) carding gap corresponding to the setting as per fig. 4b a gentle carding takes place with less shares in light fibre waste G. As Fig. 3c shows a relation exists between the recording of filter disc 24 with light fibre waste G and the carding on ground of setting of carding gap. As per Fig.6 an electronic control- and regulating equipment 33 as for example micro computer is present, at which an input equipment 34 for the desired carding gap, the drive equipment 28, the setting 23 for fixing of distance between the filetting tips of cover rods 14 and the drum set 4a, an indicator equipment 25, a preset equipment 29 and a switching element 35 for the motor 36 are connected. The concepts short fibre content, dust and fibre fragments, that means lighter fibre waste, are followingly short K5F called. During the carding the material gentle carding differentiates from material damaging carding specially the increased short fibre fly the dust exit and the free release of fibre fragments at the surrounding of mechanical loading of non-woven fleece or rather slivers (release of KSF-parts). These released KSF-parts make out infact only one part of all KSF-parts in non woven fleeces, the released share acts however proportional to remaining share in non- woven fleece or rather in sliver (in constant space- and material climate). Through it that as per invention the released KSF-amounts are trapped suction technically, it is possible to describe the degree of fibre damage or rather the degree of carding. The mechanical sliver load of non woven fleece or rather of sliver appear as per carding process in area of non woven fleece acceptance. Here specially two places are to be mentioned Position above the webspeed and Position above the prefunnel at CCD funnel One receives through it a statement powerful reference variable which one relates all to the KFS-amount, which is released in material gentle carding. In case one would like to describe additionally the entire carding area by means of KFS-amount, then like wise in an extremely fibre damaging carding positioning the KFS-amount is covered. For change of carding intensity, as per Fig. 4a, 4b and 5 the automatic PFS-adjustment is applied. First the KFS-amount is sucked specifically and is led on the small filter medium 25 of measuring equipment 19, according to which after a definite time the pressure drop before and behind the filter medium 25 is determined, from where a pressure difference ∆P is found out. This pressure difference is proportioned to KSF-amount. In case one puts the pressure difference at gentle carding to 0%, then one can describe the degree of fibre damage of any other carding percentage wise. With this percentage variable the degree of carding on line can be described. The measurement of KFS-amount can be carried out with help of a portable measurement equipment 19 at different cards. Since the PFS in each card is available at disposal, it is possible, to integrate the KFS-amount determination in the card. For this the additional cleaning equipment 37 could be replaced through a rotation reverse of ventilator 23. WE CLAIM: 1. A carding machine (CM) comprising: (a) clothed rolls (5) for processing and carrying fiber material thereon; (b) means for (9) separating lightweight waste from the fiber material processed by the clothed rolls (5) ; (c) a conduit (9c) for receiving the lightweight waste; (d) air stream generating means (23) for generating an air flow in said conduit (9c) for removing the lightweight waste; (e) adjusting means (4a,4b) for varying a degree of carding intensity of said carding machine(CM); (f) detecting means (MD) for measuring quantities of the light-weight waste produced at a respective degree of carding intensity; (g) a carding machine outlet (18), said conduit (9c) extending from said carding machine outset; and (h) a pair of crushing rolls (7,8) and a sliver trumpet (10) through which the fiber material consecutively passes, said conduit (18) extending from between said crushing rolls (7,8) and said sliver trumpet (10). 2. The carding machine as claimed in claim 1, wherein said detecting means (MD) comprises (a) a filter disposed (25',25") in said conduit (9c) for retaining thereon the lightweight waste carried by the air flow; (b) first and second pressure sensors (37a,37b) disposed in said conduit (9c) upstream and downstream of said filter (25',25") as viewed in the direction of the air flow; and (c) a pressure difference forming device (38) connected to said first and second pressure sensors (37a, 37b) for determining a difference between pressures detected by said first and second pressure sensors (37a, 37b). 3. A carding machine comprising: (a) clothed rolls (5) for processing and carrying fiber material thereon; (b) means for (9) separating lightweight waste from the fiber material processed by the clothed rolls (5); (c) a conduit for (9c) receiving the lightweight waste; (d) air stream generating means (23) for generating an air flow in said conduit (9c) for removing the lightweight waste; (e) adjusting means (4a,4b) for varying a degree of carding intensity of said carding machine (CM); and (f) detecting means (MD) for measuring quantities of the lightweight waste produced at a respective degree of carding intensity, wherein said conduit (9c) comprises a first branch conduit (20) and a second branch conduit (39), said first branch conduit (20) containing said detecting means (MD), said second branch conduit (39) extending from said first branch conduit (20) for bypassing said detecting means (MD), and a gate (22) for selectively directing the lightweight waste into said first branch conduit (20) and said second branch conduit (39). 4. A carding machine comprising: (a) clothed rolls (5) for processing and carrying fiber material thereon; (b) means for (9) separating lightweight waste from the fiber material processed by the clothed rolls (5); (c) a conduit (9c) for receiving the lightweight waste; (d) air stream generating means (23) for generating an air flow in said conduit (9c) for removing the lightweight waste; (e) adjusting means (4a,4b) for varying a degree of carding intensity of said carding machine(CM); (f) detecting means (MD) for measuring quantities of the lightweight waste produced at a respective degree of carding intensity, said detecting means (MD) comprising a filter (25',25") disposed in said conduit for retaining thereon the lightweight waste carried by the air flow; first and second pressure sensors (37a,37b) disposed in said conduit (9c) upstream and downstream of said filter (25',25") as viewed in the direction of the air flow; and a pressure difference forming device (38) connected to said first and second pressure sensors (37a,37b) for determining a difference between pressures detected by said first and second pressure sensors (25',25"); (g) a movably supported carrier disk (24) having a description portion disposed in said conduit (20) and a second portion disposed externally of said conduit (20); (h) first and second filter elements (25',25"), constituting said filter, mounted on said disks (24) eccentrically thereof; and (i) means for (36) moving said disk (24) for periodically and alternatingly placing said first and second filter elements (25',25") in said conduit (20) and externally thereof. 5. The carding machine as claimed in claim 4, comprising a filter cleaning device (41) for removing waste from the filter element (25',25") dwelling externally of said conduit (20). 6. A carding machine comprising: (a) clothed rolls (5) for processing and carrying fiber material thereon; (b) means for (9) separating lightweight waste from the fiber material processed by the clothed rolls (5); (c) a conduit (9c) for receiving the lightweight waste; (d) airstream generating means (23) for generating an air flow in said conduit (9c) for removing the lightweight waste; (e) adjusting means (4a,4b) for varying a degree of carding intensity of said carding machine(CM); (f) detecting means (MD) for measuring quantities of the light-weight waste produced at a respective degree of carding intensity, said detecting means (MD) comprising a filter (25',25") disposed in said conduit (9c) for retaining thereon the lightweight waste carried by the air flow; first and second pressure sensors (37a,37b) disposed in said conduit (9c) upstream and downstream of said filter (25',25") as viewed in the direction of the air flow; and a pressure difference forming device (38) connected to said first and second pressure sensors (37a,37b) for determining a difference between pressures detected by said first and second pressure sensors (25',25"); and (g) control means (23) for setting the degree of carding intensity as a function of the pressure difference. 7. The carding machine as claimed in claim 6, wherein said control means (33) comprises an electronic control and regulating device (33) connected to said pressure difference forming device (38) for receiving signals therefrom representing the pressure difference. 8. The carding machine as claimed in claim 7, wherein said adjusting means (4a,4b) is connected to said electronic control and regulating device (33). 9. A method of measuring lightweight waste in a carding machine, comprising the following steps: (a) processing fiber material by clothed rolls; (b) separating lightweight waste from the fiber material processed by the clothed rolls; (c) introducing the lightweight waste in a conduit; (d) generating an air flow in said conduit for carrying the lightweight waste; (e) varying a degree of carding intensity of said carding machine for setting a degree of gentle carding and a degree of aggressive carding; (f) measuring quantities of the light weight waste produced at a degree of gentle carding; (g) generating first signals representing measured quantities of the lightweight waste produced at a degree of gentle carding; (h) measuring quantities of the lightweight waste produced at a degree of aggressive carding; (i) generating second signals representing measured quantities of the lightweight waste produced at a degree of aggressive carding; and (j) comparing said first and said second signals with one another. 10. The method as claimed in claim 9, wherein the measuring steps (f) and (h) each comprise the following steps: (a) positioning a filter in said conduit for retaining thereon the lightweight waste carried by the air flow; (b) sensing a pressure in said conduit upstream and downstream of said filter as viewed in the direction of the air flow; (c) generating third and fourth signals representing, respectively, sensed pressures in said conduit upstream and downstream of said filter; and (d) generating a fifth signal representing a difference between pressures sensed upstream and downstream of said filter. A carding machine (CM) comprising: (e) clothed rolls (5) for processing and carrying fiber material thereon; (f) means for (9) separating lightweight waste from the fiber material processed by the clothed rolls (5); (g) a conduit (9c) for receiving the lightweight waste; (h) air stream generating means (23) for generating an air flow in said conduit (9c) for removing the lightweight waste; (i) adjusting means (4a,4b) for varying a degree of carding intensity of said carding machine(CM); (j) detecting means (MD) for measuring quantities of the light-weight waste produced at a respective degree of carding intensity; (k) a carding machine outlet (18), said conduit (9c) extending from said carding machine outset; and (I) a pair of crushing rolls (7,8) and a sliver trumpet (10) through which the fiber material consecutively passes, said conduit (18) extending from between said crushing rolls (7,8) and said sliver trumpet (10).

Documents:

76-CAL-2002-FORM 27.pdf

76-cal-2002-granted-abstract.pdf

76-cal-2002-granted-claims.pdf

76-cal-2002-granted-correspondence.pdf

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

76-cal-2002-granted-drawings.pdf

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

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

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

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

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

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

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

76-cal-2002-granted-priority document.pdf

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

76-cal-2002-granted-specification.pdf