EP0787841B1 - Production method of a carding sliver with a carding machine and carding machine - Google Patents

Description

The invention relates to a method for producing a card sliver with a carding machine according to the preamble of claim 1 and a carding machine according to the preamble of claim 16. Consider the preamble of claim 1 and the preamble of claim 16 the prior art according to EP 0 627 508 A1, which is explained further below.

The conventional revolving flat card has a so-called flexible arch on each side provided, which is adjustable in relation to the corresponding side plate, around the carding gap (between the set of flat bars and the set of drum). The setting can be done manually according to DE-Gbm 9313633.

It is also known for today's revolving flat cards, for example the C50 card Patent applicant that the quality of the card sliver produced at regular intervals is checked with a laboratory device. The clothing tooth is optically from the spinning master examined. If, on the basis of his observations and the operating time, he finds that the If the quality drops below a specified standard, the card must be decommissioned so that the teeth of the drum set and possibly also the cover set are re-ground can. This work is often carried out by the clothing manufacturers as part of service contracts carried out.

After grinding, the existing carding distance, which is due to wear and tear grinding has increased, be reset. There are usually three to five Control elements on the flexible bend are provided on each side of the card. The carding distance is with a leaf gauge measured and adjusted at different points. This work is well known time-consuming and cause downtimes of up to one day on a single card. It goes without saying that the spinning mills, however, keep the operating times of the machines as full as possible want to utilize capacity and therefore try to minimize the downtimes for machine revisions. In many spinning mills, this revision work is only carried out at the last moment, that means when the quality of the card sliver produced is still sufficient or is already below tolerance. Given this unsatisfactory situation the patent applicant made various suggestions for the automatic grinding of the drum set in European patent applications EP-A-497736 and EP-A-O 565 486. In the The last document is, for example, a control for the use of a grinding element in periodic Working intervals provided. The quality of the produced card sliver over a certain time and within a certain tolerance range be respected. However, it is still necessary to adjust the carding distance by hand.

A card is known from EP 0 627 508A1, which comprises a reel and to this adjustable parts, preferably having a nominal distance, such as a briseur, a stationary lid, revolving lid or customer. To check the existing one or already set the distance between the drum and the opposite, parts mentioned, a sensor is provided. The sensor can be on the side of the arrangement or in be arranged an area that lies between the sides of the drum and the sensor can be carried by a flat bar.

In addition to the means for checking the distance mentioned, there is also an adjustment actuator and a controller influencing the actuator system is provided, which controls the above-mentioned distance signal processed to control the actuators. The actuator system can be used to set a stationary one Cover element or to adjust the flexible sheet, etc. are provided.

It is an object of the present invention to adjust the card without sacrificing quality on the card sliver produced.

This task is procedurally by the features of claim 1 and device-wise solved by the features of claim 16.

Preferred embodiments of the method according to the invention or of the invention Carding machine can be found in the subclaims and the description below.

Fig. 1 eine Wanderdeckelkarde nach dem Stand der Technik, anhand welcher die vorliegende Erfindung verdeutlicht wird,

Fig. 2 schematisch einen Flexibelbogen einer Wanderdeckelkarde mit motorisch verstellbaren Stellelementen und einer erfindungsgemässen Steuerung,

Fig. 3 eine graphische Darstellung des Verlaufs des Abnutzungsgrades an Arbeitselementen der Wanderdeckelkarde, die dem Steuerungsprogramm einer Maschine nach Fig. 2 zugrunde gelegt werden kann,

Fig. 4 eine Modifikation der Verstelleinrichtung nach der DE-Gbm 93 13 633,

Fig. 5 eine Kopie der Fig. 2 der EP-A-565 486 mit Ergänzungen nach dieser Erfindung,

Fig. 6 und 7 Kopien der Figuren 3 bzw. 4 der EP-A-565 486 zur Erklärung des gesteuerten Garniturschleifens,

Fig. 8 eine schematische Ansicht vom Seitenschild einer Karde nach der Erfindung, um die bevorzugte Lösung darzustellen,

Fig. 9 ein Detail der Anordnung nach Fig. 8, und zwar in der Richtung des Pfeils IX in Fig. 8,

Fig.10 eine schematische Darstellung des Kardierabstands,

Fig.11 ein Detail der Anordnung nach Fig. 10, und

Fig.12 ein Diagramm zur Erklärung des Arbeitsprinzips der bevorzugten Lösung.

The invention has the essential advantage that the required readjustments to the working elements of the carding machine can be carried out automatically in a simple and inexpensive manner in good time and without additional checking by the spinning master. This can be done during carding, so that the otherwise necessary downtimes can be avoided, whereby the productivity of the carding machines is increased. This is extremely important, especially with the capital-intensive revolving card. The automatic readjustment or readjustment also guarantees an independent and constant quality of the card sliver produced, regardless of the operating personnel. Further advantageous designs are specified in the subclaims and can be found in the following description. There, the invention is explained in more detail using an exemplary embodiment shown in the drawings. It shows:

1 is a revolving flat card according to the prior art, on the basis of which the present invention is illustrated,

2 schematically shows a flexible sheet of a revolving flat card with motor-adjustable adjusting elements and a control according to the invention,

3 shows a graphical representation of the course of the degree of wear on working elements of the revolving flat card, which can be used as the basis for the control program of a machine according to FIG. 2,

4 shows a modification of the adjustment device according to DE-Gbm 93 13 633,

5 is a copy of FIG. 2 of EP-A-565 486 with additions according to this invention,

6 and 7 copies of Figures 3 and 4 of EP-A-565 486 to explain the controlled clothing grinding,

8 is a schematic view from the side plate of a card according to the invention to illustrate the preferred solution,

9 shows a detail of the arrangement according to FIG. 8, specifically in the direction of arrow IX in FIG. 8,

10 shows a schematic representation of the carding distance,

11 shows a detail of the arrangement according to FIG. 10, and

Fig. 12 is a diagram for explaining the working principle of the preferred solution.

1 shows a revolving flat card 1 known per se, for example card C50 Applicant, shown schematically. The fiber material is in the form of dissolved and cleaned flakes fed into the hopper 2, by a breeze or licker 3 as Cotton pad taken over, handed over to a drum or drum 4 and from a traveling cover set 5 parallelized, the opposite to the direction of rotation of the reel 4 is driven. Fibers from the fleece located on the drum 4 are then from a take-off roller 7 removed and in one consisting of different rollers Outfeed section 8 formed into a card sliver 9. This card sliver 9 is then one Tape storage 10 placed in a transport can 11 in a cycloidal manner.

In Fig. 2, a section of the flexible sheet 12 of such a card is now shown with thereon revolving revolving covers 13 (only two shown) which are supported by a toothed belt 14 and a drive, not shown here, in the same direction or in the opposite direction to the direction of rotation of the drum 4 be moved slowly. Adjustment elements 15 are provided on this flexible sheet 12, with which the distance between the revolving cover 13 and the drum surface, the so-called carding distance, can be adjusted. The design of such control elements on the flexible elbow are for example from the German utility model DE-U-93 13 633 of the applicant known. In this case, however, the adjusting elements 15 are not only manually adjustable, but rather they can be automatically adjusted by means of actuators, for example small servomotors 17. Suitable Piezoelectric translators of the designation P-170 are for this task, for example to P-173 from Physik Instrumente GmbH & Co. in D-7517 Waldbronn. This actuator technology is included connected to a controller 16, which the setting of the flexible sheet 12, and thus the Carding distance determined; for example according to an adjustment characteristic according to FIG. 3.

In Fig. 3 a diagram is shown, the change in the carding distance K on the The abscissa is a function of the accumulated card sliver production P in tons (kg) on the ordinate for different processed material types. The curve S indicates the target distance, that is the carding distance, which is without wear on the drum set (and the revolving cover) would be given. Depending on the carding work that is necessary, a certain material to be processed (influenced e.g. by dirt, fiber length and nits of the fed fiber material) there is now a stronger or less in function of the production heavy wear, as with curves a and b for the different fiber materials A and B. is made clear. The degree of wear depending on the current production for the different Provenance of the fiber material (A or B) is either known or can be determined empirically, so that this data can be entered into the controller 16 (FIG. 2) and the actuators 15 can be adjusted based on this information.

The current production of a card is a function of the delivery speed and the Band number. The total production of a card from a given point in time (e.g. from one Changing a set or a set service) is nowadays thanks to a programmable control determined by the machine and displayed on request, that is, such data is normally already present in the machine control. The "zero point" for calculating this Total production is of course also the zero point for controlling the adjustment of the carding distance usable. A prerequisite is that the elements to be adjusted are at the zero point are in a predetermined state, which is guaranteed by the operating personnel must become. Otherwise it becomes necessary to "start" the elements with a suitable one Monitor sensors and report them to the controller, which clearly shows the effort required elevated.

The control can be programmed by the machine supplier with the adjustment characteristic, that means the characteristic is entered in the memory of the control. The user can then call up the appropriate characteristic by entering the material to be processed.

The adjustment is preferably not made continuously, but intermittently (step by step) depending from the capabilities of actuators. The actuator system is preferably capable of reliably one Adjustment that is only a fraction (e.g. maximum 20%) of the normal carding distance represents. Such distances today are in the range of 20 to 30 hundredths of a millimeter. Preferably, the actuator system can reliably perform adjustment steps in the range of 1 to 3 hundredths.

The system is best suited for the user who has a long period given material type processed. The calculation of the "total production" at frequencies Changing materials will prove difficult.

If the material type and delivery remain unchanged over a long period and the If the effect is predictable, time can be used as a control parameter instead of production become. The benefit here means the effective production time in a given time period.

Fig. 4 shows a modification of Fig. 1 of DE-Gbm-9313 633 to the motorized adjustment to be able to perform according to this invention. This version also corresponds in part to the Actuator system according to Fig. 13 of our Swiss patent application No. 1681/93 (EP 94 810 309.8)

4 shows an adjusting device 20 on a card in partial cross-section. Left is a Partial section through the reel 22 of the card and above is the profile of a flat bar 23 can be seen. This flat bar 23 lies with its head piece 24 on a bearing, here a sliding or flexible sheet 25 (also called flexible sheet), which in a support element 26 with U-shaped profile is kept almost free of play. The U-shaped profile is in the area of the Provide sliding or flexible sheet 25 with a precisely fitting gap so that it is almost jammed is held in the support member 26. Below the sliding or flexible arch 25 is the U-shaped one Profile of the support member 26 expanded so that the almost clamping effect mentioned - i.e. precise guidance - only necessary in the area of the sliding or flexible bend 25 is. This simplifies production, since only these contact surfaces are precisely machined (e.g. by grinding). The support element 26 is integral with one here connected only schematically indicated side plate 27, but it can also be an independent Be part, which in a known manner by means of screws or the like with the side plate connected is. A bore 29 is provided in the base 28 of the support element 26, in which an actuator 31 can move freely in its longitudinal direction. At the foot of the control element 31 a shoe 30 is provided, which will be discussed in more detail below. Longitudinal of the adjusting element 31, a flat and narrow groove can be provided on the shaft thereof, in which is engraved with an adjustment scale, so that the adjustment of the sliding or flexible bow The setting element 31 and the shoe 30 are outside arranged on the drum plate, and therefore always easily accessible. The head 32 of the adjusting element 31 is slightly cambered and is in contact with the underside of the sliding or flexible sheet. Due to the precise location of the sliding or flexible sheet 25 in the support element 26 and the location Tilting of the contact point of the control element on the flexible bend is excluded and given a simple and time-saving setting.

The shoe 30 sits on the cylindrical surface 33 of an eccentric cam 34 which is on a shaft 35 is mounted to rotate with the shaft 35 about the longitudinal axis of the latter when an adjusting motor 36 is operated. The motor 36 is, for example, a stepper motor that is operated by a control unit 37 can be excited to the shaft 35 by a number of steps determined by the unit 37 rotate. The shaft 35 is mounted in the card frame (not shown) to rotate about the own longitudinal axis, but no further movements.

The weight of the revolving lid assembly (which is only partially shown here) pushes the Flexible sheet 25 on the head 32 of the actuating element 31. There can be other elements of this type be provided to the curvature of the arch with respect to the drum axis (not shown) to determine, or only one adjustable element 31 per sheet 25 can be provided - For example according to Fig. 13 of the previous application CH 1681/93. A double of the arrangement 4 must be provided in mirror image on the other side of the card to to be able to set the corresponding flexible sheet.

By means of the designs already described, the carding distance can be maintained during the running Automatically adjust production in a particularly simple and cost-effective way; in order to unnecessary downtimes are avoided. The readjustment or readjustment of the carding distance can also depend on the grinding of a set, in particular on automatic grinding of the drum set. So that the operating times the carding machines in a spinning mill significantly increased, without significant loss of quality to have to put up with. A suitable embodiment is described below with the aid of Fig. 5 described. This figure corresponds to a combination of FIG. 2 from EP-A-565 486 with the 13 from CH 1681/93 (EP 94 810 309.8) and with additions according to this invention For the time being, the controlled grinding according to EP-A-565 486 is briefly described, for details of the method or the arrangement is referred to the entire EP document.

Fig. 5 shows schematically the reel 40, briseur 42, pickup 44 and the grinding system that is indicated as a whole by reference numeral 46. System 46 includes a grindstone its holder, a drive motor and a guide means (not shown) which the Grinding stone holder leads over the width of the card during a lifting movement. On the latter Elements is discussed in more detail in EP-A-565 486 and the description is not repeated here. FIG. 5 also shows the drive motor 50 for the card, which drives the reel 40, for example Timing belt 52 set in rotation when the card is in operation. The motor 50 is through signals controlled by a card controller 54 and reports its status to this controller 54 back. The card controller 54 also controls the grinding system 46, in the example shown it was assumed that the grinding system was provided with its own "under-control" 56, which certain control functions autonomously based on control commands from the main controller 54 performs.

The main controller 54 has a display 58 and a keyboard 60 for the human machine Provide communication. This controller 54 also includes a time signal generator, which is schematic is indicated at 62.

a) die Anzahl Hubbewegungen des Schleifsteines während einer bestimmten Betriebsphase,

b) die Betriebsgeschwindigkeit derartiger Bewegungen (dies kann aber in der Untersteuerung 56 einprogrammiert sein),

c) ein Startsignal zum Auslösen einer Betriebsphase.

The main controller 54 now issues the following control commands to the sub-controller 56:

a) the number of strokes of the grindstone during a certain operating phase,

b) the operating speed of such movements (but this can be programmed in the sub-controller 56),

c) a start signal for triggering an operating phase.

6 and 7, the various phases (and the corresponding control commands or machine settings to be entered by the operator) become.

6 is a timing diagram and is used to explain the duration of each standby phase used. This diagram is not a realistic representation of reality, but rather to be understood as a purely fictional diagram to explain principles.

In Fig. 6, the time on the horizontal axis and the tooth wear of the drum set is on plotted on the vertical axis. The "curve" K1 shows the increasing tooth wear a period T1 of uninterrupted operation with a predetermined drum speed and one certain processed material. The "wear" is to be understood here as tooth wear, which leads to an impairment of the functionality of the tooth as a carding element. This is explained in more detail below with reference to FIG. 7. In other operating conditions (drum speed, processed material) the wear is slower (e.g. after curve K2) or even faster (not shown), which results in a steeper curve.

It is assumed in FIG. 6 that tooth wear has reached such a level at "N" that needs to be sanded. This is not an absolutely valid level, but can be obtained from the spinning mill in Depending on your production program (orders) determined at your own discretion become. The decision is e.g. based on the delivered card sliver quality, e.g. to the nits level. The (rather unrealistic) assumptions of the example shown result in the operating conditions of curve K1 a maximum operating time T1 and curve K2 a maximum operating time T2 until the card for card grinding (without using a built-in grinding system) would have to be shut down and partially dismantled. It is about one Much of this period T1 (or T2) worked with a significant degree of tooth wear Service. The grinding then causes an interruption U until the card again for another Period T1 (or T2) can start operating.

By using a built-in grinding system (like System 46, 5) it is possible to determine the effective tooth wear (which is decisive for the product quality) to keep almost zero. But this was a complex operation because a certain The degree of wear of the teeth remains without significant loss of quality, that is to say is tolerable. Accordingly, under the operating conditions of curve K1, it is possible For example, to let the card work over an operating period t without a measurable one Effect on product quality arises. At the end of this operating period t, the system becomes 46 (Fig. 5) actuated to cause a predetermined number of strokes of the grindstone, which brings effective wear back to zero, with no downtime. A The possibility of controlling the number of lifting movements is explained below with reference to FIG. 7. A preferred solution is listed below towards the end of the description.

The operating time t (without using the grinding system) is the standby period of the grinding system 46 equal. During this period, the grindstone waits in its end position or is in this end position ready for use. The time period t can be determined by the operator via the Keyboard 60 can be entered into the controller 54 (and again via the display 58 for control purposes be retrieved). The "optimal" conditions can first be determined by test settings and the determined values can then be entered for normal operation.

However, it may turn out that the "optimal" waiting period t over the life of a given set (i.e. until the card is refinished), i.e. the duration of this Waiting period will often prove to be a function of the total operating time of the set. This can by controller 54 using an hour meter (not shown) and messages be taken into account both by the motor 50 and by the time signal generator 62. The engine 50 (which drives the drum) is only shown as an example as a source for the signals which the Activate operating hours counter. Such signals could e.g. removed from the customer drive would and would therefore have a closer relationship to the material flow.

The correct function of the operating time and a start signal after re-garnishing must by the operator, after which the controller 54 is able to select the correct ones Determine when to use the grinding system. At the end of each waiting period Controller 54 sends a start signal to sub-controller 56 to use the grinding system trigger. The subsequent use will now be explained with reference to FIG. 7.

Fig. 7 shows diagrammatically two teeth 64,66 of a set and their direction of movement P. Die Work of the tooth is done at the tip S, and the wear at this point is for the Product quality is decisive. The technology of carding (the product quality) is of the Sharpness of the tip depending on the leading edge of each tooth 64,66 etc. When grinding (all Types) the tooth height is reduced in order to have a sharp tip S1, S2 etc. to restore at the front edge. This can go down to a very low tooth height continued, e.g. to the tip Sn (Fig. 7), where the tip in the transition to the next Tooth pending.

It can be seen from FIG. 7 that the carding distance is compulsorily every grinding operation is changed unless newly hired. This can now be accomplished by means of an actuator system 5, for example after the modifications described in FIG. 5 Application with respect to Fig. 2 of EP-A-565 486.

The card has a flexible sheet 70 on each side (only indicated schematically). The machine frame (not shown) includes a guide (not shown) for an actuator 72, similar to the Example of the actuating element 31 (FIG. 4), which works together with an eccentric cam 74. The Cam is rotated by a motor 78 by means of a shaft 76 when the motor 78 is off the Card control 54 is controlled. The same controller 54 now controls both of these Grinding by means of the device 46 as well as the adjustment of the flexible arch (of which only one 5 can be seen) by means of the motors 78 (one per card side).

1. Das Schleifen und das Verstellen wird jedes für sich, d.h. unabhängig voneinander, gesteuert (programmgemäss ausgelöst),

2. das Verstellen wird im Anschluss an einen Schleifvorgang ausgelöst.

3. Das Verstellen und das Schleifen kann unabhängig voneinander ausgelöst werden, wobei das Verstellen auch im Anschluss an einen Schleifvorgang ausgelöst werden kann.

Depending on the programming of the controller 54, various combinations are now conceivable, namely:

1. The grinding and the adjustment is controlled individually (ie independently of each other) (triggered according to the program),

2. The adjustment is triggered after a grinding process.

3. The adjustment and the grinding can be triggered independently of one another, whereby the adjustment can also be triggered after a grinding process.

The preferred solution provides for adjustment after a grinding process, namely after a number of grinding operations determined by the control. The Adjustment can only be triggered after several grinding processes, e.g. only when the top S2 (Fig. 7) or even the peak S3 is reached. The number of operations can be preprogrammed become. The adjustment also programmed then depends on the number mentioned Processes as well as the intensity of the grinding.

According to an advantageous modification of the program according to FIG. 7, the grinding system is used not strictly controlled according to time, but according to production. To this end the user can set the desired lifespan of the set, based on the number produced Enter the quantity of material (tons) in the control. According to a given characteristic the latter can then determine how often grinding has to be carried out in the controller's memory. This The characteristic must be adapted to the type of material and / or the clothing type, or it must the appropriate type can be called by the user from memory. This characteristic in turn determines both the total number of grinding cycles (e.g. the double stroke of the grinding stone) about the set lifetime of the set, as well as the distribution of these grinding cycles over the lifetime.

The adjustment of the flexible arch can now be controlled using the same characteristics, since the tooth shape will probably only be possible after a few grinding cycles by taking the bow into account.

The use of actuators to compensate for the effect of the grinding is of course not on the Combination with a grinding process controlled by the machine is restricted. It could e.g. a signal can be entered into the control by the user, one by the user fixed adjustment causes. According to the operating instructions for the Grinding can be set even when using a grinder for grinding on the card assembled and then dismantled again. There could even be preprogrammed "adjustment steps" are triggered by the user, the time of adjustment by the user is determined itself.

The use of actuators to compensate for the effect of tooth wear (without consideration grinding) is also not limited to the solution according to FIG. 3. For example, are sufficient, in a simplified solution, the use of the adjustment actuators only after production (without considering the material type).

The actuator can of course be used to determine the effects of wear on the clothing of the drum and / or the flat bars, i.e. the invention is not based on the Limited consideration of wear on the drum sets.

A card that is conventional today is of considerable size - see e.g. those in EP-A-446796 specified comparison values. It is necessary to adjust the carding distance to be strictly observed at all points, i.e. over the entire working area of the flat bars. It is therefore desirable to run the flexible sheet in several places and when Adjusting again, as will now be explained with reference to FIGS. 8 to 12. Figures 10 and 11 are explained relatively briefly for the time being, since they are only listed to explain terms, which will be used in the explanation of the other figures below.

The curve 80 in FIG. 10 represents the "impact circle" (or the "lateral surface") of the tips of the clothing 81, which is carried by the drum 4. The curve 82 represents the impact circle (or the lateral surface) the tips of the set 83, which is carried by the flat bars 13 (Fig. 2). In Fig. 10 is the division of the set 83 into partial sets on the various flat bars 13 has been neglected, since this division is irrelevant for the required explanation. Because of this division, the effective impact circle is not a curve segment in practice, but rather a polygon, but approaching a curve segment. The carding distance KA is the distance from impact circle 82 to impact circle 80. This distance is usually intentionally variable over the length of the flexible bend - it is relatively large at the inlet (where a flat bar is in contact comes with the flexible arch) and relatively small at the outlet (where the flat bar is again from the flexible arch).

Since Fig. 11 shows only one detail, on a larger scale, only one appears here Flat bar 13 with part of the "set" 83 according to Fig. 10. The flat bar 13 has a sliding surface 84, which slides on a sliding surface 85 (FIG. 8) on the flexible sheet 12. The dimension ZH in 11 shows the tooth height or the distance between the impact circle 82 and the sliding surfaces 84 and 85 respectively. The carding distance KA changes while the card is working, namely out Reasons in this description and in EP-A-384297, EP-A-627508 and DE-A-4235610 have been explained.

The task of the solution according to FIGS. 8 and 9 is to set the one correctly Carding distance KA (including any variability along the flexible sheet) through the compensation to be able to intermittently restore the effects of wear and tear while the card still working.

For this purpose, the flexible bow 12 according to FIG. 8 is indicated by five arrows Positions S1 to S5 (hereinafter referred to as "positioning points") or opposite the side plate 26 supported. The shield 26 comprises a bearing part 90, which the axis of rotation 92 from Drum 4 defined. A separate control element 31 is assigned to each control point S1 to S5, for the sake of simplicity only one such adjusting element 31 in FIG. 8 and another 31 A in FIG. 9 will be shown. The elements 31 at the control points S1, S2, S3 and S5 each have a cambered Head, on which the arch 12 is based, or against which the arch 12 from the element 31A at the set point S3 is pulled The latter element (Fig. 9) has a bore 93 with a thread for Receiving a pin 94, of which the head 95 in a recess (not shown) in the flexible bend 12 is added so that the arc between the head 95 and the end of the element 31 A is clamped and has to move with the element.

The adjustment mechanism is the same for all elements 31, 31A, so that it is sufficient to use only one To describe copy. This comprises two lugs 96 which are attached to the shield 26 side by side are (or are cast in one piece with the shield), and a pin 97 between the lugs 96 is rotatably supported about an axis of rotation 98. The central part of the pin 97 (between the lugs 96) has a cylindrical surface 99 (see FIG. 9) which is opposite the Axis of rotation 98 is arranged eccentrically. Each actuator 31, 31A is with a connecting ring 100 provided, which receives the eccentric central part of the pin 97 without play. At the Rotating the pin 97 about the axis 98 therefore moves the element in one or the other other radial direction opposite the axis of rotation. A guide (not shown) can be on the shield 26 can be provided to ensure linear movements of the element 31,31A.

Each pin 97 is connected to a rotary lever 101 with the purpose of applying torque to it to be able to exercise. Each rotary lever 101 is assigned a respective rocker arm 102, which moves around an axis of rotation 104 carried by the shield 26 can tilt. The tilting movement of all levers 102 is accomplished by a common actuator 106. This device includes a rail 107 which is guided in a guide (not shown) carried by the shield, and in such a way that it can move about its axis 92 in its own longitudinal direction. Since the Rail 107 is connected to each rocker arm 102 (e.g. at location 108, Fig. 8), the Movements of the rail 107 simultaneously to all levers 102 and to all elements 31.31 A. transfer.

A movement of the rail 107 is brought about by a suitable, controllable drive 109. On Electric cylinder with a distance measurement is suitable as drive 109, the results of Distance measurement as control signals to a controller (not shown in Fig. 8, but see e.g. Fig. 5) can be forwarded via signal lines.

Fig. 8 shows the sheet 12 only on one side of the card. On the other hand is a second one Bow 12 with its own elements 31.31A, eccentric pins 97, lever 101.102 and actuating device 106 provided. The two arches 12 can therefore each individually (independently of one another) can be set. The principle of adjustment or tracking is as follows explained with reference to FIG. 12, this figure as a purely schematic representation (without reference to Reality regarding mass of the elements).

Assume that the card is initially set so that at operating temperature or operating speed the impact circle 80A of the drum set a sliding surface 85A of the flexible bow is delivered. It is further assumed that the impact circle 80A is circular around the axis of rotation 92 (see also FIG. 8), wherein the sliding surface 85A can also be circular or opposite the reel can be "adjusted" to a variable carding distance in the work area To achieve flat bars.

It is now assumed that the drum set of the drum set shrinks during operation the card on 80B (the masses have been exaggerated in the interest of illustration). The Sliding surface 85 should "follow" the impact circle, but the carding distance (including any Variability) should be kept as constant as possible. The curvature of the sliding surface 85 must therefore be changed, at least to take into account the change in the curvature of the impact circle 80. In the illustration according to FIG. 12, the sliding surface 85A must not merely be vertically downwards drive - it must also adapt to the changed radius of the impact circle 80.

The control points S1 to S5, where the control elements touch the sheet 12, must therefore be move along the respective radii R1 to R5 which intersect at the axis of rotation 92, and they must all follow the same route DELTA R, e.g. S1 -> S11, S2 -> S22, S3 -> S33, S4 -> S44 and S5 -> S55.

If now only the wear on the drum set has to be taken into account, the way is DELTA R is the radial distance between the impact circle 80A and the impact circle 80B. The new setting does not contain any contribution to the possible wear on the set the flat bars 13 to be considered. To compensate for this wear, the Slide surface 85 are moved closer to the impact circle 80, so that the distance "a" between of the sliding surface 85A and the impact circle 80A is greater than the distance "b" between the sliding surface 85B and the impact circle 80B.

1. Mittels einer Blattlehre (oder eines anderen geeigneten Gerätes) wird für jede Seite der Karde eine "Grundeinstellung" festgehalten. Dieser Schritt ist nach wie vor zeitraubend und mühsam, und er erfordert sowohl Geschick als auch Erfahrung. Anders als bis anhin kann aber zukünftig die Grundeinstellung durch Nachstellen gemäss der Erfindung relativ leicht wieder hergestellt werden.

2. Beim Nachstellen wird entweder gemäss einem vorgegebenen Programm (z.B. nach Fig. 5) oder gemäss vom Bedienungspersonal eingegeber Angaben (Befehle) der Flexibeibogen verstellt.

3. Es können sicherheitshalber gelegentlich einige Kontrollen pro Seite durchgeführt werden.Da aber der Bogen als Ganzes nachgeführt wird, wobei die Bewegungen an allen Stellpunkten miteinander gekoppelt sind, werden die durch die Grundeinstellung vorgegebenen Verhältnisse auch beim Nachführen aufrechterhalten.

4. Was geprüft werden muss, ist das Mass des Nachführens bzw. die Grösse der Schritte- Dies muss anhand von Erfahrungswerten für den effektiven Verschleiss festgelegt werden.

In this context, the term "wear" includes both the wear caused by material processing and the loss due to grinding. Setting now requires the following steps:

1. A "basic setting" is held for each side of the card by means of a paper gauge (or another suitable device). This step is still time consuming and tedious, and it requires both skill and experience. Unlike in the past, the basic setting can be restored relatively easily in the future by readjustment according to the invention.

2. When readjusting, the flexible sheet is adjusted either according to a predetermined program (for example according to FIG. 5) or according to information (commands) entered by the operating personnel.

3. As a precautionary measure, a few checks can be carried out on each side. However, since the sheet is tracked as a whole, with the movements being linked to each other at all positions, the conditions specified by the basic setting are also maintained during tracking.

4. What has to be checked is the amount of tracking or the size of the steps. This must be determined on the basis of empirical values for the effective wear.

Trommelgarniturwechsel

Deckelsatzwechsel

Deckelgarniturwechsel

Ausgleich einer "konischen Trommel"

Ausgleich eines "konischen Deckelsatzes".

However, a device according to this invention can have a broader application than just compensating for the effect of wear. The following changes or maladministration can also be taken into account by adjusting:

Cylinder clothing exchange

Cover block change

Flat clothing exchange

Compensation for a "conical drum"

Compensation for a "conical cover set".

The last two procedures require differences in the tracking of the two card sides. The Apparatus can of course be used when using a conventional grinding process e.g. if the drum set or cover set by means of a across the width of the Carding extending grinding roller is ground.

Claims (22)

1. Method to produce a card sliver (9) with a carding machine (1) whereat the condition of the working elements (81, 83) worsens in relation to the length of operation and whereat the working elements need to be adjusted from time to time in order to at least partially balance the worsening of the condition, whereby the re-adjustment is carried out by an actuating system (15, 17, 78, 106) that is controllable by a control means (16, 54), characterised in that

   a) the control means (16, 54) is provided with a control program which initiates the re-adjustment, based on a pre-known wear characteristic (K1 K2) which depends on the actual production, and/or

   b) that the working elements (81, 83) are the clothings (83) of the flat rods (13) and the clothing (81) of the drum (40) of a revolving flat card (1) , that the clothing (81) of the drum is re-ground from time to time and that the carding gap between the clothings (83) of the flat rods (13) and the re-ground clothing (81) of the drum (40) is re-set automatically by the control means (16, 54) in dependence of the grinding of the clothing (81) of the drum (40), or

   c) that the working elements (81, 83) are the clothings (83) of the flat rods (13) and the clothing (81) of the drum (40) of a revolving flat card (1), that the clothings (83) of the flat rods are re-ground from time to time and that the carding gap between the re-ground clothings (83) of the flat rods (13) and the clothing (81) of the drum is automatically re-set by the control means (16, 54) in dependence of the grinding of the clothings (83) of the flat rods (13), or

   d) that the control means (16, 54) adjusts an adjustment defined by the user, if necessary at a point of time defined by the user.
2. Method according to claim 1, characterised in that the wear characteristic also depends on the condition of the material supplied.
3. Method according to claim 1, characterised in that the point zero for the calculation of the overall production is used as the point zero for the controlling of the re-adjustment of the carding gap.
4. Method according to claim 1, characterised in that a re-adjustment characteristic, depending on the type of material, is stored in the storage unit of the control unit (16, 54).
5. Method according to claim 1, characterised in that, if the type of material and the material supply remain unchanged over a long period of time, and if the efficiency rate is predictable, the time instead of the production is taken as control of the parameter.
6. Method according to claim 1, characterised in that the re-adjustment is only initiated after several grinding processes.
7. Method according to claim 1, characterised in that the re-adjustment of the carding gap is performed/carried out by re-setting the flex bends (12, 25, 70) and that this re-adjustment is being controlled on the basis of the same characteristic as is applied for the grinding of the clothing (81, 83).
8. Method according to claim 1, characterised in that the grinding of the clothings (81, 83) and the re-adjustment of the carding gap are initiated according to the program, independently of each other.
9. Method according to claim 1, characterised in that the re-adjustment is initiated after a grinding process.
10. Method according to one of the claims 1 to 9, characterised in that during re-adjustment, the positioning points (S1, S2, S3, S4, S5) move radially in relation to the drum (40).
11. Method according to one of the claims 1 to 10, characterised in that the re-adjustment is carried out in steps, whereat each positioning point (S1, S2, S3, S4, S5), on one side of the card, is moved across the same distance.
12. Method according to one of the claims 1 to 11, characterised in that the re-adjustment takes place by independent re-adjustment of the two flex bends (12, 25, 70).
13. Method according to claim 12, characterised in that the flex bend (12, 25, 70) is adjusted simultaneously at several points.
14. Method according to claim 13, characterised in that the flex bend (12) is pulled at one positioning point (S3).
15. Method according to one of the previous claims, characterised in that the re-adjustment is carried out while the production is running.
16. Carding machine with working elements (81, 83) and means (15, 17, 31, 34, 35, 36, 74, 78, 102, 106) for the re-adjustment of said elements (81, 83) in order to at least partially balance a worsening condition of the elements, whereby a control means (16, 54) and an actuating system (15, 17, 31, 34, 35, 36, 74, 78, 102, 106), controllable by the control means, is provided in order to carry out the re-adjustment, characterised in that,

    a) the control unit (61, 54) is provided with a control program which initiates the re-adjustment based on a pre-known wear characteristic (K1 K2) that depends on the actual production, and/or

    b) that the working elements (81, 83) are the clothings (83) of the flat rods (13) and the clothing (81) of the drum (40) of a revolving flat card (1) , that the clothing (81) of the drum is from time to time re-grindable by a grinding means (46) and that the carding gap between the clothings (83) of the flat rods (13) and the re-ground clothing (81) of the drum (40) is re-set automatically by the control means (16, 54) in dependence of the grinding of the clothing (81) of the drum (40), or

    c) that the working elements (81, 83) are the clothings (83) of the flat rods (13) and the clothing (81) of the drum (40) of a revolving flat card (1) , that the clothings (83) of the flat rods are from time to time re-grindable by a grinding means (46) and that the carding gap between the re-ground clothings (83) of the flat rods (13) and the clothing (81) of the drum is re-set automatically by the control means (16, 54) in dependence of the grinding of the clothing (83) of the flat rods (13), or

    d) that the control means (16, 54) is laid out in order to re-adjust an adjustment defined by the user, if necessary at a point of time defined by the user.
17. Carding machine according to claim 16, characterised in that the control means (16, 54) comprises a storage unit into which a wear characteristic (K1 K2) of the working elements is entered, said characteristic being dependent on the production, based on said characteristic the control unit (16, 54) acts on the positioning means (15, 31) of the working element (81) of the drum (40) by means of the actuating system ( 15, 17, 31, 34, 35, 36, 74, 78, 102, 106), so that said working element (81) is automatically re-adjusted and/or repaired at time intervals determined by the control unit (16, 54).
18. Carding machine according to claim 16, characterised in that the characteristics also depend on the condition of the material.
19. Carding machine according to claim 17 or 18, characterised in that an automatic grinding device (46) is provided by means of which the teeth of the clothing (81) of the drum (40) of a flat revolving card (1) are newly ground at time intervals determined by the control means (16, 54).
20. Carding machine according to one of the claims 16 to 19, characterised in that the control means (16, 54) is laid out in such a way that the positioning elements (15, 31) of the flex bend (12, 25, 70) are re-adjustable on the flat revolving card (1) by means of the actuating system ( 15, 17, 31, 34, 35, 36, 74, 78, 102, 106).
21. Carding machine according to one of the claims 16 to 20, characterised in that the actuating means (97, 101, 102, 106) of one card side comprises a common drive (106) for the positioning elements (31) of said side, which are re-adjustable simultaneously.
22. Carding machine according to one of the claims 16 to 21, characterised in that the actuating systems comprises at least one positioning element (S3) which is subjected to tensile load during the re-adjustment.

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