CN1082106C

CN1082106C - Method and device for detecting mass of fibre material in spinning machine

Info

Publication number: CN1082106C
Application number: CN96110954A
Authority: CN
Inventors: F·贝奇勒
Original assignee: Zellweger Luwa AG
Current assignee: Uster Technologies AG
Priority date: 1995-07-19
Filing date: 1996-07-19
Publication date: 2002-04-03
Anticipated expiration: 2016-07-19
Also published as: JPH0931775A; CN1145960A; DE59608295D1; JP3750030B2; EP0754789B1; EP0754789A1; TR199600597A2

Abstract

The invention relates to a method and device for detecting the mass of fiber material (5) which is processed in a rotor spinning machine to form yarn. In order to obtain a measurement signal which is a function of the mass of fiber material and which can also be used for controlling or monitoring a spinning station without requiring an independent measuring device, this measurement signal is detected in the spinning station of a rotor spinning machine on the feed trough (1) thereof.

Description

Be used for method for quality and device at spinning machine detection fibers material

The present invention relates to a kind of method and a kind of device of detection fibers quality of materials in spinning machine.

Known spinning machine for example only is equipped with a so-called feeding trough at the inlet to yarning position or spinning box, and it will press to the feeding roller with the feeding fibrous material that the ribbon form is carried, and therefore, this fiber material is fed roller and draws in by feeding trough.That this feeding trough can be understood that the lever form or the flap form, it is settled rotationally and can its does approximately tangential extension relatively near the feeding roller.After the feeding roller, this fibrous material is received by an opening roller, minute is combed into single fiber at this this fiber.

If the thickness of fibrous material or quality are being recorded around the yarning position or in the zone, so, for example known measurement mechanism just must be arranged on before the yarning position as measurement funnel etc. or after.But this point have only when along the fibrous material of carrying vertically have the space that is used for measurement mechanism the time just can so be provided with.If exist the space, people just can be provided with a measurement mechanism so, but it just produces resistance and must overcome it in fibrous material, and therefore, this fibrous material just may be affected in the mode of not expecting.

Task of the present invention for this reason as specifically noted in the claims, is that a kind of method and a kind of device are set, and it can be avoided above-mentioned defective and can realize measurement to mass of fibre material.

The technical scheme that solves this task is, the quality of detection fibers in the feeding roller zone of the yarning position of rotor spinning machine.One has a measuring mechanism on feeding trough to its suitable device, and it is the structure that can send a signal, and this signal is corresponding with the mass of fibre material on the feeding trough.This measuring mechanism can so constitute on the one hand, that is, itself can detect the motion or the position of feeding trough, and it is determined and be converted into a kind of measuring-signal by the quality of ribbon or the variation of thickness.On the other hand, a measuring mechanism can integral body be formed in the feeding trough, and measuring mechanism provides a signal.This measuring mechanism can be surveyed the surface of fiber material and produce skew in response to unevenness, and can realize be offset moving and convert an indication about stroke or pressure to.Therefore, this side measuring mechanism can have detecting element, and this element links to each other with a pressometer or a stroke measurment device.As the stroke measurment device special extension can be set and measure bar, stroke recording device optics or condenser type work or pressure recorder pneumatic or piezoelectric type work.

The advantage that is realized for example is thus, and this fibrous material can only need through less elements on the one hand, and therefore, the adverse effect that causes also reduces; This spinning machine also only need be equipped with less elements on the other hand, thereby yarning position is also sensible easily on every side with it.Additional advantage is, the measuring-signal that is produced is particularly suitable for the adjusting of yarning position, and promptly they can directly apply to adjusting, and therefore the quality fluctuation of fibrous material has just been avoided by this suitable adjusting on yarning position.Like this, also set up such possibility, promptly before being processed into yarn with regard to the quality of testing fiber material.

Elaborate the present invention by embodiment and with reference to accompanying drawing below.Wherein:

Fig. 1 to 8 be respectively apparatus of the present invention each special embodiment and

Fig. 9 is the change curve of the signal of measured value and derivation.

Fig. 1 shows the device of a band feeding trough 1, it can rotate around axis 2 in a localized area herein and settle, and have a guidance surface 3 and be used for fibrous material 5, this feeding trough 1 circumference of feeding roller 4 relatively approximately tangentially is placed, as long as this feeding trough is in the words of an operating position.After feeding roller 3, connect an opening roller 6.In addition, in the flow process upstream guiding structural 7 is set and is used for fibrous material, it is led fibrous material on the feeding trough 1.Angle transmitter 8 as measuring mechanism is set on feeding trough 1 in addition, and it detects corner 9, and the thickness or the quality of this angle and the fibrous material 5 between guidance surface 3 and feeding roller 4 are proportional.This corner transmitter 8 is connected with assessment unit 11 by a lead 10.The task of this assessment unit is, for measuring mechanism provides the energy, tries to achieve the signal that is come by measuring mechanism and amplified, and be provided as calibration, is zero compensation, the possible mode that influences for signal normalization and/or for compensate for disturbances.On identical meaning, say, can expect that different feeding troughs can rotating feeding trough 1 with replacement.Then, can measure a stroke to substitute an angle.

Fig. 2 shows another embodiment, wherein, settles a measuring mechanism 12 in feeding trough 1, and this mechanism is in the bottom of guidance surface 3.This measuring mechanism 12 has a detection agency 13 and an evaluation circuits 14.Simultaneously, bar is measured in the extension of making a flexible measuring stick and having on it bridge circuit of settling of this detection agency 13.This evaluation circuits is connected on the bridge circuit and for example has an amplifier.And this output signal can send to an assessment unit by a lead 15 herein.

Fig. 3 has shown a view of feeding trough 1, and people can find out a passing away 16 that is used for fibrous material especially thus; This passage side limits by the gauge tongue 17 that stretches out.The guidance surface 3 of this feeding trough 1 has a window 18, can stretch out a detection agency 13 thus.

Fig. 4 shows such embodiment, and wherein, detection agency 13 is connected with a lever system 19.This system again with stroke recording device 20 mating reactions.For this reason, this detection agency 13 is by a spring imposed load of describing herein, and this spring is extruded on the fibrous material 5 detection agency.

Fig. 5 shows a band and gives the embodiment of the detection agency 21 of displacement earlier, and this mechanism 21 is mutually opposed with an additional guiding structural 22.This guiding structural 22 is placed in equally on feeding trough 1.This detection agency 21 acts on the spring 23, and it is provided with to extend measures bar.This measurement bar is arranged on again in the bridge circuit.An evaluation circuits 24 is provided with an amplifier equally.

Fig. 6 shows a configuration structure with the similar detection agency 21 of Fig. 5, but it and lever system 25 cooperatings, this lever system 25 can amplify or dwindle the drift condition of this detection agency 21, and this will decide according to its configuring condition.And a stroke recording device 26 is set herein to detect the drift condition of this lever system 25.

Fig. 7 shows a system, and it is worked according to a passive pneumatic gauging principle.Therefore, be equipped with an opening 27 that passes to fibrous material as measuring mechanism in guiding structural 22, it is connected with a pressure converter 29 by a conduit 28.This conduit 28 is connected with a feed pipe 31 by a front nozzle 30 in addition.This pressure converter 29 can as disclosed at patent application CH1828/95 be that sample is connected on the ante-chamber.Simultaneously, the feeding trough that preferably connects on it for all of the pressure in feed pipe 31 equates.

Fig. 8 shows the system of the measuring mechanism 42 of capacitor formula work, and this system is placed on feeding roller 4 guiding structurals 7 in front.The electric capacity of this measuring mechanism is placed in the bridge circuit, and it is connected with the assessment unit 41 of a known type again.

The mode of action of described different system is as follows:

In the embodiment of Fig. 1, the position of feeding trough 1 is determined one corresponding to the thickness of fiber material 5 or the value of quality, and above-mentioned position shows by corner 9.In this case, this feeding trough 1 must be executed by elasticity and carry and settle in the mode of easy motion.A signal that shows corner 9 is delivered on the assessment unit 11 by lead 10, and it so represents this signal, or so prepares it, and promptly it can be applied in the adjusting or follow-up work relevant with corner 9.

In the embodiment of Fig. 2, find the operating point that is used for measuring system an of the best and afterwards feeding trough 1 is fixed on this position by regulating feeding trough 1 to the spacing that feeds roller 4.Like this, fibrous material moves this detection agency 13 only so, and promptly it makes a measuring stick implementation bending more or less always.This bending is then detected in known manner by extending the measurement bar.

In the embodiment of Fig. 4, have only detection agency 13 motion and it lever 40 that moves again equally, its skew can be detected.

Under the embodiment situation of Fig. 5 and 6, with similar process operation, its difference is, needn't regulate feeding trough 1 position of feeding roller 4 relatively, but the spacing of the relative guidance surface 3 with it in the position of guiding structural 22 must be conditioned, so that realize best operating point.For this reason, be provided with the still known device of not describing.

Under the embodiment situation of Fig. 7, the position of guiding structural 22 must be regulated.But this size that is in pressure in the pipeline 31 and nozzle 30 plays an important role for the working method that obtains a best.

Under the embodiment situation of Fig. 8, this feeding trough 1 can fixed in position.The quality of the fibrous material of carrying as ribbon 5 is measured near feeding roller 4 as much as possible in known manner.

The various characteristic that in the system shown in Fig. 1 to 8 has as Fig. 9, shows.In Fig. 9, on axle 32, put down in writing numerical value corresponding to mass of fibre material, on axle 33, a signal of telecommunication for example voltage or ampere have been put down in writing, the numerical value of a frequency or a digitized signal, and on vertical axis 34, put down in writing and the corresponding numerical value of physical parameter, as the numerical value of a corner, a pressure, the numerical value of power or stroke.As straight line 35 show, what drawn between the in the end alleged numerical value and the numerical value of the signal of telecommunication may be a kind of relation of linearity.Correspondence will be referred to measure principle with it, whether and the skew value corresponding and and the quality value corresponding between have a kind of relation of linearity.Straight line 36 and 37 has shown at the system of Fig. 1 and Fig. 4, the correlation under 6 and 8 the system situation.Article one, curve 38 shows the correlation when Fig. 2 and 5 systems, and simultaneously, line 39 has shown the correlation in the system of the pneumatic work of Fig. 7.Just can select a working region from these characteristic lines 36-39, wherein, should roughly be suitable for the change of its quality, people correspondingly feed roller 4 relatively and regulate feeding trough 1 or relative guidance surface 3 adjusting guiding structurals 22.

Claims

1. the method for quality of detection fibers material (5) on a spinning machine, wherein,

Described quality is detected in the zone of the feeding roller (4) of a yarning position of an open-end spinning frame, it is characterized in that described quality is by a measuring cell (21,27,42) detect, measured element is arranged to be offset forward with respect to feeding roller (4) and is linked to each other with guiding structural (22,7).

2. by the described method of claim 1, it is characterized in that: described quality goes up detected at feeding trough (1).

3. the device that is used for the quality of detection fibers material (5) in the zone of the feeding roller (4) of the yarning position of a spinning machine, its be used for sending and feeding trough (1) on the corresponding signal of quality of fibrous material (5), it is characterized in that,

One measuring cell (21,27,42) is set with being offset forward and it is arranged in the zone of guiding structural (22,7) with respect to the feeding roller.

4. by the described device of claim 3, it is characterized in that: be provided with a detection agency (21) as measuring cell, it is arranged on the feeding trough (1) on guiding structural (22) opposite.

5. by the described device of claim 3, it is characterized in that: be provided with an opening towards fibrous material (27) as measuring cell, it links to each other with a pressure converter (29) by a conduit (28).

6. by the described device of claim 3, it is characterized in that: described measuring cell is arranged on the guiding structural (7), and it guides to fibrous material on the feeding trough.

7. by the described device of claim 3, it is characterized in that: guiding structural (22) is arranged on the feeding trough (1).

8. by the described device of claim 3, it is characterized in that:

This measuring cell constitutes in the mode of condenser type work.

9. by the described device of claim 3, it is characterized in that:

Pressure converter (29) is set up as measuring cell.