JPH08260255A - Coaming machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the thickness of a combed sliver to be maintained as constantly as possible even after the lapse of time so as for it not to change with time. SOLUTION: A comparison equipment is at least one component of the controller for generating at least one adjustment signal 16 which controls at least one composition element 4, 6, 10 selected from the group consisting of the composition element of a combing head, composition elements of means 3, 4 for assembling combed slivers each from a single head into one fiber sliver joint 5 and composition elements of the draft machines 6, 10 belonging to the combing machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination of a plurality of combing heads for delivering a single head lifting sliver made of a combed fiber material and the single head lifting sliver. Means for forming one fiber sliver joint, a drafting device for drafting the fiber sliver joint, a means for forming a combed sliver from the drafted fiber sliver joint, and a sliver for the combed sliver A sensor device for continuously detecting the thickness or the mass of the fiber sliver assembly, and a comparison device for comparing at least one processed output signal from the sensor device with a presettable target value. It relates to a combing machine of the type provided.

[0002]

2. Description of the Prior Art Combing machines of the type described above are known, in which each combing head in principle has one nipper unit for feeding the wrap to be combed. During operation, it is reciprocated between a rear end position and a front end position. In the rear end position, the nipper unit is closed and holds the front end section of the wrap against the rotating circular comb. Then the nipper unit is moved to the front end position and opened, and the front end of the fiber tuft combed by the circular comb is fed back by the counter rotation of the previously formed detaching cylinder. It is placed on the rear end section of the combed fleece. Following this, the detaching cylinder is rotated in the forward direction (forward direction) so that the fiber tufts are withdrawn from the wrap located in the nipper unit and combined with the combing fleece. This coalescing action is
In the art, it is called soldering.

The fleece formed in the plurality of combing heads is formed into a single-head lifting sliver through one funnel guide, and each single-head lifting sliver runs on one delivery table. On the delivery table, the single head lifting sliver is deflected and guided in parallel to each other and runs as a fiber sliver joint toward one draft device. As a rule, behind the drafting device (in some cases or even before the drafting device), a sensor device for continuously detecting the sliver thickness or thickness of the combing sliver or the mass of the fiber sliver joint is arranged. Has been done. Such devices are described, for example, in the patent literature, namely European patent application 03760.
It can be easily conceived based on the specification No. 02.

A sensor device for this purpose detects the sliver thickness of a combed sliver at short intervals, and calculates an average value signal and a variation signal from discrete detected sliver thickness values. The short intervals correspond, for example, to the sliver mileage (after advancing the draft device) on the order of 1 cm or the time interval of several ms, respectively. The average value signal represents the average value of the sliver thickness over a relatively long distance. The variation signal represents, for example, discrete variations in the detected sliver thickness values calculated over a relatively long distance. It is also possible to calculate the dispersion spectrum of the sliver thickness from this discrete sliver value. The relatively long distance corresponds to, for example, a sliver traveling section of the order of 100 m or a time interval of the order of 1 minute.

A comparator device can then compare the mean value signal and / or the variation signal with the respective target value.
In a known combing machine of the type described as a superordinate concept of the invention in claim 1, the output signal of the comparison device is such that the average value signal or the variation signal has a deviation of a prescribed allowable error range of the target value or more. Used to shut down the combing machine if it has one.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to improve a combing machine of the type described in the preamble of claim 1 without changing the sliver thickness of a combed sliver over time. The goal is to keep it as constant as possible over time.

[0007]

SUMMARY OF THE INVENTION A comparison device is a constituent element of a combing head, or a constituent element of a means for combining single head lifting slivers into a single fiber sliver joint, or a drafting device belonging to a combing machine. Is a component of at least one controller for generating at least one adjustment signal for controlling at least one of the components.

[0008]

In order to be able to automatically equalize the sliver thickness of the produced combed fried sliver during operation, the adjusting signals sent by the controller or controllers allow the various constituent elements in the combing machine to be adjusted. It is possible to exert control interference on the. Examples of the constituent elements as described above include the following members. Ie:
Drive device (for example, drive motor) for the nipper unit in the combing head (for example, for changing the detaching interval, that is, for changing the front end position of the nipper unit), for the fiber feeding cylinder axially supported in the nipper unit Driving device (for changing the fiber feeding length), driving device for the detaching cylinder of the combing head (for changing the detaching time point and / or the detaching length and / or the detaching speed and / or the joining interval), combing An adjusting device for the fixed comb of the head (for changing the puncture depth), an adjusting device for the draft device (for changing the draft ratio and / or the spacing or load of the draft rollers of the draft device),
And an adjusting device (for changing the stroke length of the single-head lifting sliver) for the deflection guide roller for the single-head lifting sliver on the delivery table. In order to exert a control interference on the combing process, it is also possible to change the suction negative pressure for the combs by adjusting the suction blower used for this. Short-term variation in sliver thickness of combed sliver (variation from several cm wavelength to several m wavelength in drafted combed sliver)
The main factor of detaching operation and joining (soldering)
In operation. Such short-term variations are purposely minimized by exerting control interference on the drive for the detaching cylinder. Long-term variations in the sliver thickness of the combed sliver are compensated, for example, by exerting control interference on the drive (for changing the draft ratio) for the draft device. Advantageous components of the invention are specified in the subclaims 2 and the following claims.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

The combing machine shown in FIGS. 1 and 2 has, for example, eight combing heads arranged in a row, each combing head supporting the lap roll body 1 and the combed fiber material. The single head lifting sliver 2 consisting of Since the single head lifting sliver 2 runs on the delivery table 3 and is deflected on the delivery table by one deflection guide roller 4, these single head lifting slivers are parallel to each other. One fiber sliver bonded body 5 is formed on the slab, and the sliver bonded body 5 travels toward the draft device 6. Three draft roll pairs 7, 8 and 9 of the draft device are schematically shown, the draft roll pairs being continuously driven by a drive device 10.

A trumpet guide 11 is arranged at the exit of the draft device 6, and the trumpet guide is
The drafted flat sliver or fleece is shaped into a generally circular comb sliver 12. The circular combing sliver 12 then runs through a sensor device 13 in the form of a measuring funnel which continuously delivers an electrical signal corresponding to the thickness of the combing sliver 12. This electrical signal is supplied to the processor 14.

In the processor 14, first, a signal representing the sliver thickness of the combing sliver 12 is processed to form an average value signal representing the average value of the sliver thickness. The second signal is then calculated as the percentage deviation of the instantaneous sliver thickness from the mean value. This second signal, the percentage deviation of the instantaneous sliver thickness from the mean value do, is illustrated in the graph of FIG. 4 over a length L of the combed sliver 12 of about 20 m. Furthermore, along the drafted combed fried sliver 12 at short intervals, for example a few milliseconds (1 to
10ms or 3-6ms) or about 1cm (0.5-2c)
The instantaneous sliver thickness d _i is detected at intervals of m), and the deviation coefficient CV is calculated based on the following equation.

[0013]

[Equation 1]

The number of samples n is in the order of 10 ⁴ and corresponds to, for example, an interval of 10 to 100 seconds or an interval of 100 m along the combing sliver 12. Further, it is possible to detect the spectrum of the sliver thickness variation. Such a spectrum, that is, the variation amplitude in the continuous zone of the variation wavelength λ is graphically displayed in FIG.

The processor 14 also has at least one controller. The comparison device forms part of each controller or part of each controller. The comparison device sends the above-mentioned signal, that is, the mean value d _{o of the} sliver thickness and / or the deviation coefficient CV and / or the spectrum of the sliver thickness variation (or a part of the spectrum) to the conductor 14
It can be compared with a settable target value supplied via. Such a target value is, for example, a limit value that can be set for the magnitude of one amplitude, as illustrated in FIG. In other words, the soldering process must be controlled and interfered accordingly so that the joint site does not generate amplitudes above the limit value. Then, in connection with the comparison result (s), each controller may be provided with an adjustment signal for the constituent elements of the combing head, or an adjustment device for adjusting the deflection guide roller 4 on the delivery table 3, or a draft device. 6 or an adjustment signal for the drive device 10 is generated and delivered via the conductor 16 towards the adjustment site.

In addition to the sensor device 13, it is also possible to arrange another sensor 13a, shown in broken lines, in front of the draft device 6, which sensor measures the fiber mass fed to the draft device 6. The measured and signal is agitated and sent to the processor 14. A comparison with the target value is then made in the processor 14. The value resulting from this comparison (the deviation from the target value) is processed as a control signal to effect a control intervention in the drive system of the draft device 6. As a result, in particular, as long as the draft device 6 is equipped with a control device, it is possible to compensate for short-term variations in the amount of fibers to be fed through the control of the draft device 6. In particular, it is possible to detect the sliver break by the sensor 13a and activate the corresponding means by this. It is also possible to combine the signals of both the sensor device 13 and the sensor 13a with one another to form a control signal for control intervention. Since the measurement and control system of the above type is widely known based on actual operation and based on the patent document (for example, European Patent Application Publication No. 1412488), a detailed description thereof will be omitted here. To do.

The components of the combing head are shown in FIG. 3, which is a schematic vertical cross-section of the combing head. A nipper shaft 20, a circular comb shaft 21, two lap rollers 22 for supporting the lap roll body 1, a detaching cylinder 23, and a drawing roller are pivotally supported in a frame of the combing machine. The nipper shaft 20 supports a nipper arm 25, and a rear end portion of a lower nipper frame 26 is pivotally attached to the nipper arm 25. During operation, the nipper shaft 20 is driven by a drive device 27, which is only schematically shown in a block diagram, to reciprocate the lower nipper frame 26 between a rear end position and a front end position as shown. For example, it can be turned back and forth via a transmission. At the rear end position of the lower nipper frame 26, the nipper unit to which the upper nipper knife 29 supported by the upper nipper arm 28 also belongs is closed, and the front end section of the lap 30 fed from the lap roll body 1 is at the upper part. It is tightened between the nipper knife 29 and the lower nipper plate,
And it is carded by the circular comb segment 31.
The circular comb segment 31 is mounted on a circular comb shaft 21 that is continuously rotated by a drive 32. The nipper units 26, 28, 29 are then
The fiber tufts, which have been moved and opened to the front end position shown, and which have been carded out by the circular comb segment 31, are fed back by the reverse rotation of the detaching cylinder 23, the previously formed comb lift It sits on the rear end section of the fleece 33.

The detaching cylinder 23 is a driving device 3
4, particularly by a servomotor, as can be seen from the diagram in FIG. 6, a Pilger step type (eg 3 steps forward 1
It is reciprocally rotated by a step-back type motion. FIG. 6 shows a movement stroke of one point on the outer circumference of one detaching cylinder 23 during one rotation of the circular comb shaft 21.
When the rotation angle of the circular comb shaft 21 is 0 °, the lower nipper frame 26 is at the rear end position (not shown). The detaching cylinder 23 rotates only slightly until the rotation angle reaches 90 °. At about point A, the detaching operation is started by the reverse rotation of the detaching cylinder 23. After the reverse rotation, the nipper units 26, 28, 29 reach their front end positions as already mentioned, and the front end of the carded-out fiber tufts is fed to the combing fleece 3
Place on top of the sent back trailing section of 3. Since the detaching cylinder 23 is now rotated in the forward direction (forward direction), it holds the fiber tufts,
It is pulled out from the wrap 30 located in the nipper unit 26, 28, 29, and the fixed comb 35 arranged on the lower nipper frame 26 is pulled through to be combined with the comb-lifting fleece 33. This coalescing operation is also referred to in the art as "joining (soldering)." In FIG. 6, the tangent line t tangent to the motion curve segment representing the forward rotation is shown.
Is written, the gradient of the tangent line t corresponds to the detaching speed. The double arrow a represents the detaching length, and the double arrow l represents the joining distance, that is, the distance between the consecutive joining sites.

The above values, that is, the position of the starting point A of the detaching operation, the detaching speed (gradient of the tangent t), the detaching length a and the joining interval l are all with respect to the average value of the sliver thickness of the combing sliver 12. And / or can affect variations in the sliver thickness. As can be seen from the spectrum shown in FIG.
A variation with a wavelength λ of m has a relatively large amplitude. The wavelength of about 50 cm is about 31 mm when the draft ratio in the draft device 6 is about 16.
Corresponds to the joining interval 1 of. In essence, relatively strong variations occur as a result of the joining, and the amplitude of the variations can be reduced by controllably varying one or more of the values. Therefore, in an advantageous embodiment of the invention, a controller or at least one controller in the processor 14 (FIG. 2) delivers a regulation signal for the drive 34 of the detaching cylinder 23. If the drive unit 34 is a mechanical transmission,
In order to change the position of the starting point A (FIG. 6) of the detaching operation, the adjusting signal can actuate the adjusting device, for example for one component of the transmission. However, it is particularly advantageous for the drive device 34 to be a servomotor, in which case the position of the starting point A of the detaching operation or the detaching speed (t) or the detaching length a or the joining distance 1 is adjusted. The signal can control the energy supply for the servomotor.

The combing fleece 33 that advances from the detaching cylinder 23 is then transported by the pull-out roller 24. One funnel guide forms each combed frying fleece 33 into a single head lifting sliver 2, which then runs on a delivery table 3.

On the delivery table 3, the single head lifting sliver 2 is deflected by the deflection guide roller 4 and merged into the fiber sliver bonded body 5. In the fiber sliver joint body 5, the irregular sliver thicknesses of the single-head lifted sliver caused by the joints are not located at the same position, but are shifted from each other in the longitudinal direction.
This shift is associated with different stroke lengths on the delivery table 3. In order to obtain mutual compensation of the irregular thickness of the single head lifting sliver in the fiber sliver joint 5 (and thus also in the combing lifting sliver 12 drafted by the drafting device 6) the associated deflection guide rollers 4 are adjusted. As a result, the stroke length can be changed for each single head lifting sliver 2. The controller or at least one controller in the processor 14 may send an adjustment signal to activate some or all of the deflection guide rollers 4 and an adjusting device (not shown) for adjusting the deflection guide rollers 4. .

Comer fried sliver 1 (as indicated by the average value signal formed in processor 14)
Variations in the sliver thickness of 2 over a relatively long period of time can be very easily compensated by correspondingly changing the magnitude of the draft ratio obtained with the draft device 6.
In an advantageous embodiment of the invention at least one controller embedded in the controller or processor 14 is
An adjustment signal is sent to the driving device 10 of the draft device 6. With the adjustment signal, the rotation speed of the preceding draft roll pair 9 in the draft device 6 is set so that the average thickness of the drafted combing sliver 12 becomes substantially constant to a preset target value, and In any case, the rotation speed of the medium draft roll pair 8 can also be controlled. The adjustment signal can, for example, control a supply device that supplies energy to a servomotor that drives a draft roll.

As already mentioned above, it is also possible to equip the inlet of the draft device 6 with another sensor 13a to detect short-term variations and transmit them to the processor 14 for controlling the drive of the draft device. is there. Also, a composite signal is formed from the signal of the sensor device 13 and the signal of the sensor 13a, the composite signal for adjusting another component of the combing head (eg a separate drive of the detaching cylinder). It can also serve as a basis for control interference with the tuning element.

The adjustment signal sent from the controller or at least one controller embedded in the processor 14 minimizes the fluctuations and / or variations in the sliver thickness or thickness of the comb fried sliver 12 as confirmed by the sensor device 13. For constraining, other components of the combing machine can also be controlled.

For example, in order to change the front end position of the lower nipper frame 26 and thus the detaching interval, it is possible to control the driving device 27 of the nipper shaft 20. (The detaching interval is the distance from the nip line on the lower nipper plate at the front end position of the nipper unit to the nip line on the adjacent detaching cylinder 23 at the rear.) An axis in the lower nipper frame 26 The power supply for the drive servomotor of the supported fiber feeding cylinder 36 (FIG. 3) can be controlled to change the fiber feeding amount. The amount of fiber feeding in this case corresponds to the distance by which the fiber feeding cylinder 36, which is intermittently rotated, advances the incoming wrap 30 during each reciprocating motion of the nipper units 26, 28, 29.

The adjusting device for the fixed comb 35, which is supported on the lower nipper frame 26 in each combing head, adjusts the adjustment signal in order to change the puncture depth of the fixed comb into the fiber tuft which is withdrawn by the detaching cylinder 23. Can be operated by.

In order to change the axial distance of the draft roll pairs 7, 8, 9 it is also possible to activate the adjusting device for the roll axes of the draft roll pairs by means of an adjusting signal.

It is also possible to create a suction negative pressure to exert control interference on the combing process by adjusting the suction blower used to drive out combs (noils) and other debris. In addition, this makes it possible to exert control interference on the joining (soldering) process.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a portion of a combing machine.

FIG. 2 is a schematic front view of FIG.

FIG. 3 is a schematic vertical cross-sectional view of one combing head portion of a combing machine.

FIG. 4 is a diagram showing a comb fried sliver thickness detected by a sensor device of a combing machine.

5 is a spectrum diagram showing variations in the thickness of the combed sliver sliver shown in FIG.

FIG. 6 is a diagram showing a reciprocating rotary motion of a detaching cylinder in a combing machine.

[Explanation of symbols]

1 wrap roll body, 2 single head lifting sliver, 3 delivery table, 4 deflection guide roller, 5 fiber sliver bonded body, 6 draft device, 7,8,9 draft roll pair, 10
Drive device, 11 trumpet guide, 12 circular combing sliver, 13 sensor device, 13a
Sensor, 14 processor, 15 and 16 lead wire, 20 nipper shaft, 21 circular comb shaft,
22 Wrap Rollers, 23 Detaching Cylinders, 24 Draw Rollers, 25 Nipper Arms, 26 Lower Nipper Frames, 27 Drives, 28 Upper Nipper Arms, 29 Upper Nipper Knives, 30 Laps, 31 Circular Comb Segments, 32 Drives, 33 Comers Lifting fleece, 34 drive device, 35 fixed comb, 36 fiber feeding cylinder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Christian Grieshammer, Switzerland Winterthur Butz by Ackerstraße 43 (72) Inventor Guido Bluenecker, Switzerland Atwil Bonecker Schutrace 11

Claims (7)

[Claims] 1. A plurality of combing heads for delivering a single-head lifting sliver (2), each of which is made of combed fiber material, and said single-head lifting sliver (2) are combined to form 1 Means (3, 4) for forming one fiber sliver assembly (5), a drafting device (6) for drafting the fiber sliver assembly,
A means (11) for forming a combed fried sliver (12) from the drafted fiber sliver bonded body, and a sliver thickness of the combed fried sliver (12) or a mass of the fiber sliver bonded body (5) are continuous. In a combing machine comprising a sensor device (13, 13a) for detecting at least one and a comparator device for comparing at least one processed output signal from the sensor device with a presettable target value. The device comprises a constituent element of a combing head, or a constituent element of a means (3, 4) for uniting a single head lifting sliver (2) into one fiber sliver joint (5), or a draft belonging to a combing machine. At least one of the components of the device (6, 10) (27; 32; 3)
5; 36; 4; 6; 10), which is a component of at least one controller for generating at least one regulation signal (16) for controlling the combing machine. 2. A variation in the sliver thickness of the combed sliver (12) measured at a predetermined interval, a variation in the mass of the fiber sliver bonded body (5) measured at a predetermined interval, or the sliver thickness or A signal processing device for processing a variation signal representing the variation spectrum of the mass from a transmission signal of the sensor device (13, 13a) and a comparison device for comparing the variation signal with a settable target value are provided. 2. Combing according to claim 1, characterized in that the comparison device is a component of a controller for generating an adjustment signal for a drive (34) of at least one detaching cylinder (23) provided in each combing head. Machine. 3. The following quantity values in the drive (34) for the detaching cylinder (23), namely the starting point (A) of the detaching operation, the detaching length (a), the detaching speed (t) and the joining interval (l). 3. The combing machine of claim 2, wherein at least one of the) is adjustable by an adjustment signal generated by a controller controlled by the variation signal. 4. Combing machine according to claim 2, wherein the drive device (34) for the detaching cylinder (23) comprises a servomotor. 5. An adjustable deflection guide roller (4) for deflecting a single-head lifting sliver (2) fed from a combing head towards a drafting device (6) is placed on a delivery table (3). The sensor device is provided with a variation signal representing the variation of the sliver thickness of the combing sliver (12), the variation of the mass of the fiber sliver bonded body (5), or the variation spectrum of the sliver thickness, which are arranged and are measured at predetermined intervals. A signal processing device for processing from the output signal of (13, 13a) and a comparison device for comparing the variation signal with a settable target value are provided, and the comparison device includes the deflection guide roller (4). 5. The combing machine according to claim 1, which is a constituent part of a controller for generating an adjustment signal to the adjusting device according to claim 1). 6. A sensor device (13) placed after the draft device (6) and a combed sliver (12) drafted in the draft device (6) each time a sliver of a predetermined length runs. An average value signal representing the average value of the sliver thickness of the comb-dried sliver is given to the sensor device (1
A signal processing device for processing the output signal of 3) and a comparison device for comparing the average value signal with a settable target value are provided, and the comparison device is a driving device for the draft device (6) ( Combing machine according to any one of claims 1 to 5, which is a component of a controller for generating an adjustment signal for 10). 7. A drive device (10) for the draft device (6), wherein the draft amount applied by the draft device (6) is
7. The combing machine according to claim 6, wherein the combing machine is adjustable by an adjustment signal generated by a controller controlled by the average value signal.