CZ305558B6 - Method of controlling textile machine with at least one yarn detector at workstation - Google Patents

Abstract

When producing a yarn (0), at least one yarn (0) fabrication characteristic is monitored by at least one yarn detector (1, 2) in the yarn detector (1, 2) monitoring zone. Data, acquired by the monitoring of the yarn (0) fabrication characteristic in the monitoring zone is the used for the control of at least one working means of the machine and/or a working means of a workstation in the yarn (0) fabrication phase. At least one nonproductive state of the yarn (0) is monitored in the yarn (0) non-manufacturing phase in the yarn detector (1, 2) monitoring zone. Data acquired by the monitoring of this yarn (0) nonproductive state in the yarn detector (1, 2) monitoring zone, is used for the control of service operations at the workstation.

Description

The invention relates to a method of controlling a textile machine with at least one yarn sensor at a workstation, wherein during the yarn production by the yarn sensor, at least one yarn production characteristic in the yarn sensor monitoring zone is monitored. at least one machine working means and / or work station working means in the yarn production phase.

BACKGROUND OF THE INVENTION

In the textile industry, knowledge of the condition, quality and other parameters of manufactured products, such as yarns, fiber strands, etc., is one of the key areas. Equally important is the need to know the conditions occurring at the textile machine workstations, such as yarn break, breakdown, job site breakdown, etc.

A variety of sensors and sensors are known for monitoring various parameters on a textile machine, such as the quality and / or break of yarn and other longitudinal moving formation produced at a textile machine workstation, as well as workstation and machine condition sensors such as breakage, filling of the wound bobbin, opening or closing of the spinning unit, movement or stopping of working means, etc.

For monitoring individual parameters or parameter types, specialized sensors are used, eg for yarn quality monitoring, a yarn quality sensor equipped with its own electronics and software and connected to the machine control system is used, on the machine control system, to monitor operating conditions at the workstation, specialized sensors are located at the workstation, eg rotation, opening, etc.

Integrated yarn quality and yarn break sensors are also known, which are essentially devices that integrate both sensors previously housed in separate housings into one housing.

A disadvantage of the prior art is the relatively large number of separate sensors needed at each of a number of the same workstations, which in total gives a relatively large number of sensors, which increases the complexity of the machine and the cost. Due to the progressive automation and digitization of machines, there is also a need to monitor new and new parameters and statuses at the job, a condition that was not necessary to know or monitor at all recently.

It is an object of the present invention to reduce the number of individual sensors while maintaining or extending the overall functionality and awareness of the machine's operation and results.

SUMMARY OF THE INVENTION

The object of the invention is achieved by a textile machine having a yarn quality and / or yarn breaker, characterized in that the yarn sensor monitoring zone monitors at least one yarn non-production stage in the yarn non-production phase, used to manage service operations on the job.

The present invention is based on the fact that modern digital yarn sensors, in particular optical yarn sensors with dedicated computing means, have a relatively high processing power and a number of their specific functions are based in particular on proper use of hardware resources by corresponding software, thus enabling the existing sensor yarns with enhanced functionality, ie for other functions at the workstation or on the machine or to reduce the number of specialized sensors or sensing means needed so far, in particular for yarn monitoring functions or simple tracking zone monitoring, during service operations at the workstation, for example, while preparing to start spinning, etc.

Clarification of the drawing

The invention is shown schematically in the drawing.

DETAILED DESCRIPTION OF THE INVENTION

The invention will be described by way of example of a textile machine having a quality sensor 1 and / or yarn breakage sensor 2 and a method of operating it, in particular an embodiment of a spinning machine for yarn production 0 and winding on a cross-wound bobbin. types of textile machines, such as rotor spinning machines, jet spinning machines, winding machines, including machines with other yarn storing means or with yarn stock 6 which temporarily assume the yarn storing function 0 instead of the spool 3, by sucking through the yarn piping 8, etc.

The spinning machine comprises a number of identical workstations arranged next to each other. Among other things, the powertrain and machine control unit are assigned to the job council.

The work station comprises a set of working means for producing the yarn 0 and winding it on the bobbin 3, in this case a cross-wound bobbin 3. Between the yarn production means 0 and the yarn winding means 0 on the bobbin 3 is arranged a yarn withdrawal device 9 from the means 4 for yarn production.

Further, a yarn quality sensor 1 is provided between the yarn production means 0 and the yarn winding means 0 on the bobbin 3, or there is a yarn breaker sensor 2 or both sensors 1, 2 are provided.

In the following, either the particular encoder of the yarn sensor, i.e. the yarn quality sensor, or the yarn break sensor 2, will be used if the description relates to that particular sensor 1 or 2, or only "yarn sensor 1, 2" it is to be understood that the above matter relates either to the yarn quality sensor 1 or the yarn break sensor 2, or to the two sensors 1, 2 without distinction.

The yarn sensor 12 is designed as an optical yarn sensor 0, which comprises a radiation source against which at least one radiation detection means is arranged, comprising at least one row adjacent to each other the radiation-sensitive elements. An empty space is formed between the radiation source and the radiation detecting means which forms the yarn tracking zone. In the production of yarn 0, the yarn 0 is moved in the monitoring zone of the sensors 1, 2 and at least one production characteristic of the yarn 0 is sensed, in particular the yarn characteristics 0 such as yarn movement 0, yarn diameter 0 and its changes, yarn surface properties 0 ( the color characteristics of the yarn 0, the presence of foreign fibers in the yarn 0, e.g. polypropylene, and last but not least, the presence or absence of fibers. the absence of yarn 0 in the tracking zone to detect yarn break 0 and stop yarn 0 from being produced. The yarn sensor 1, 2 further includes its own electronics and software that provide the actual operation of the yarn sensor 1 and its functions. The sensor 1, 2 is further connected to a machine control device to which it transmits the readings.

According to the present invention, the yarn sensor 1, 2 monitors the above-mentioned manufacturing characteristics, for which the sensors 1, 2 are primarily intended, but its functionality is extended by monitoring. 9.

at least one non-manufacturing state of the yarn 0 in the monitoring zone, which is not directly related to the primary determination of the yarn sensor 1, 2, i.e. not directly related to the detection of the physical properties of the produced yarn 0; during spinning. E.g. for yarn quality sensor 1, the primary determination is to monitor yarn quality 0, which is to monitor yarn diameter 0 and its changes over time, to monitor yarn surface parameters 0 such as yarn hairiness, color, and changes thereof. yarn break 0, i.e., creating information to stop yarn production 0 and start service operations to resume yarn production at the workstation.

According to the present invention, the yarn sensor 1, 2 is provided with means for monitoring at least one yarn quality and / or yarn breakage, yarn quality and spin condition, and at the same time is provided with means for monitoring at least one non-production yarn state 0 in the monitoring zone during off time. producing the yarn 0, i.e. between the end of the yarn 0 production at the work station and the start of the introduction of new fibers into the yarn forming device 0 for spinning. Such non-manufacturing state of the yarn 0 is, for example, the yarn return direction 0, the yarn return direction 0, the presence / absence detection of yarn 0 in the monitoring zone of the sensor 12 at time out of yarn production 0, in the direction in which the yarn 0 moves when the yarn is withdrawn 0 during yarn production 0 etc.

According to the invention, the yarn quality sensor 1 is provided with means for monitoring the quality of yarn 0 and possibly yarn break 0 as a yarn production characteristic of yarn 0 and further comprising means for sensing at least one non-production state of yarn 0 in the monitoring zone. yarn 0 in the monitoring zone when yarn production 0 is stopped, means for detecting yarn 0 motion when yarn 0 is unwound at the workstation, means for detecting yarn motion 0 in the direction in which yarn 0 moves at the time of yarn production when yarn withdrawn 0 or the quality sensor 1 is provided with means for determining the moment of change of state in the monitoring zone when the yarn 0 is not being produced, eg means for determining the stopping time or vice versa of the yarn starting time 0; kd y yarn leaves the tracking zone etc.

According to the invention, the yarn breakage sensor 2 is provided with means for monitoring the yarn breakage moment 0 as a manufacturing characteristic and a system for evaluating this manufacturing characteristic, and further comprises a system for monitoring at least one non-manufacturing state of the yarn 0 in the monitoring zone, e.g. yarn 0 when yarn 0 is unwound at a workstation outside yarn production 0 and / or is provided with a system for determining the moment of change of the yarn state 0, e.g., to determine the stopping or starting time of the yarn 0, zone, or when yarn 0 leaves the tracking zone, etc.

The invention works by arranging a yarn quality sensor 1 and / or a yarn breakage sensor 2 in the area between the yarn production means 4 and the yarn winding means 5 on the spool 3. During the production of the yarn 0, i.e. during spinning or after starting the introduction of new fibers into the yarn forming device 0 for spinning, these sensors 1, 2 follow the manufacturing characteristics of the yarn 0 before it is wound on a spool 3. This is the standard functionality of the sensors 1,2, which is commonly used today.

It is an object of the invention that, in addition to the production characteristics of the yarn 0, these, preferably optical, yarn sensors 1, 2, respectively, are used. it also monitors at least one non-production state of the yarn 0 in the monitoring zone, which is not related to the yarn 0 production process, in particular the condition in the monitoring zone during the yarn preparation and start-up, spinning-in operation. the yarn 0, the yarn movement 0, the presence or presence of the yarn 0 are monitored by the optical yarn sensor 1, 2 in the monitoring zone. absence of yarn 0 etc.

- 3 GB 305558 B6

Monitoring the state of the yarn 0 in the monitoring zone outside the yarn production 0, i.e. in the non-production phase of the work station, means, for example, detecting and monitoring the course of the yarn return movement as it is unwound from the bobbin 3 towards yarn forming means 4 or i beyond these means, or the movement of the yarn 0 into the region between the yarn winding means 5 and the yarn forming means 4, e.g. into the yarn intermediate reservoir 6 located between the yarn forming means 4 and the yarn winding means 5 on the bobbin 3, etc. The detected non-manufacturing state of the yarn 0 in the monitoring zone is used to control the means of the workstation for unwinding the produced yarn 0 from the spool 3 into the yarn storage bin 6 to perform servicing operations at the workstation.

The monitoring of the non-production state of the yarn 0 in the monitoring zone, i.e. the non-production phase of the work station, i.e. when the yarn production is stopped or the introduction of new fibers after spinning is not understood, in the yarn monitoring zone 1, 2, at the time of stopping the yarn production or the unmounted spinning process, it starts moving or stops moving, i.e. it stops. This non-productive state in the monitoring zone is used in the workstation or machine control system or control unit, for example, as a starting point for triggering or, conversely, stopper operation at the workstation, spinning, etc. Another possibility of using the detection of the movement of yarn 0 in the monitoring zone at the time the yarn production is stopped, for example the possibility of detecting the presence of yarn 0 in some working equipment of the workstation, eg presence of yarn 0 in the yarn guide 7 or in a length compensator (not shown). In this case, it is assumed that if the other working means of the work station are stationary and only the yarn guide conductor 7 is moved, then if yarn 0 is present in the yarn guide conductor 7, it will occur as a result of the movement of the yarn. the yarn 0 guide wire 7 as well as the yarn 0 movement in the tracking zone, which is detected by the yarn sensor 12 as a non-production state in the monitoring zone and is considered to confirm the presence of yarn 0 in the yarn guide wire 7 etc. there may be a number of specific operating situations in which the application of this principle is possible and advantageous, thus saving additional detection means, handling means, etc.

Monitoring the presence of resp. absence of yarn 0 in the monitoring zone of the sensor 1, 2 of the yarn at the time of yarn production 0 or of unmounted spinning is also understood as eg determining whether yarn 0 is / is not present in the monitoring zone of sensor 1, 2; enters, or vice versa, when it exits the sensor zone 1, 2, for example, as a result of performing some non-manufacturing operation at the work site, eg as a result of handling yarn 0 to resume yarn production 0 (finding and preparing yarn end 0 on the bobbin or the path between the spool 3 and the yarn forming means 4, guiding the prepared yarn 0 to a position intended to start the piecing, preparing the individual nodes of the work station and possibly the piecing machines, etc.).

In the case of the so-called controlled yarn breakage 0, when yarn 0 is intentionally interrupted by the machine based on the yarn 0 quality assessment system information, ie the deliberate yarn breakage 0 induced by the sensor and the yarn quality based on detected yarn quality 0, working place of the machine, resp. for the controlled gradual stopping of the machine's working position. At present, stopping the production of yarn 0 is in most cases carried out in such a way that after stopping the yarn 0 remains at least part of its working path at the workstation and also most likely remains in the monitoring zone of at least one optical sensor 1, 2. In this case the non-manufacturing state of the yarn 0 in the monitoring zone according to the present invention is the information from the sensor 1, 2 about the presence or absence of the yarn 0 in the monitoring zone of the respective optical sensor 1, 2. 0, during which the non-production state in the monitoring zone is also the movement or standing of the yarn 0 in the monitoring zone.

As a result, the yarn sensor 1, 2 is maintained in the active state during the non-production phase of the work station, during the work operations at the work station, and monitors the events in the monitoring zone, with event data in the monitoring station. a zone outside the production of the yarn 0 is used to control at least one working means of the work station and / or the machine.

For the purposes of the present invention, the yarn production stage or yarn production stage, i.e., the yarn production stage 0, is understood to be a period of time beginning at the time of starting the introduction of new fibers into the yarn forming device 0 at the spinning station and ending at the stopping time. producing the yarn 0 at the workstation, e.g. until the end of the introduction of new fibers into the yarn forming device 0 or until the yarn withdrawal 0 is stopped, all after the yarn break, or the controlled yarn stopping at the workstation etc.

The non-production phase or the non-production phase of the yarn 0, respectively. for the purposes of the present invention, a period of time beginning at the end of the yarn formation at the workstation and ending at the start of the introduction of new fibers into the yarn forming device at the spinning workstation.

Claims (4)

PATENT CLAIMS A method of controlling a textile machine having at least one yarn sensor (1,2) at a workstation, wherein during the yarn production (0) the yarn sensor (1,2) monitors at least one yarn production characteristic (0) in the sensor monitoring zone (0). 1,2) a yarn, wherein the data obtained by monitoring the yarn production characteristic (0) in the monitoring zone are used to control at least one machine working means and / or work station working means in the yarn production stage (0), characterized in that In the non-production phase of the yarn (0), at least one non-production state of the yarn (0) is monitored in the zone of the yarn sensor (1,2), the data obtained by monitoring this non-production state of the yarn (0) in the monitoring zone. Method according to claim 1, characterized in that the return movement of the yarn (0) is monitored as it is unwound from the spool (3) and the obtained data is used to control the unwinding of the yarn (0). Method according to claim 1, characterized in that the starting or stopping point of the yarn (0) is monitored and / or the starting or exit point of the yarn (0) is monitored or monitored, and the information thus obtained is used to start or stop the yarn. stopping service operations at the job. Method according to claim 3, characterized in that the obtained information is used to start the yarn spinning process (0) at the workstation.