JPH01246422A - Drawing frame equipped with sliver controlling device - Google Patents

Abstract

PURPOSE:To prevent spinning of extraordinary sliver, by converting a measured signal from a thickness detector of spun sliver into unevenness data of constant length sliver by a conversion function part and comparing the unevenness data with normal and abnormal unevenness characteristic data to discriminate unevenness characteristics. CONSTITUTION:A measured signal continued from a thickness detector 11 of a spun sliver 30 is converted by an interface part 14 into unevenness data of constant length sliver and inputted to CPU15. In CPU15, the inputted signal is compared with a preliminarily inputted standard weight value, a weight variability pattern io a control limit as normal sliver and several abnormal weight variability pattern to continuously check weight variability ratio of the spun sliver 30 and unevenness characteristics. When discriminated unevenness characteristics are controllable by a draft roller part 1, revolution of back rollers 8 are regulated and when uncontrollable by the draft part 1, a machine stand is stopped and cause of abnormal sliver is shown on CRT17.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a drawing machine equipped with a spun sliver management device, specifically, a drawing machine equipped with a spun sliver management device. A drawing machine that can continuously measure the thickness of the spun sliver to be produced, input the measured values into a computer one after another, and manage the uneven thickness characteristics of all the slivers stored in the can. It is related to.

(Prior art) As is well known, recent drawing machines incorporate a sliver thickness unevenness control device, which controls fluctuations in the amount of supplied sliver introduced into the back roller or the thickness of the spun sliver sent out from the front roller. The thickness of the spun sliver is controlled by checking the fluctuations in the sliver and adjusting the draft rate of the trough 1-roller section in accordance with these fluctuations.

The spun sliver with its thickness unevenness controlled in this way is stored in a can and supplied to the next process. Then, to check whether the supplied sliver is within a predetermined weight range, a portion of the sliver is removed from the can and the weight per 6 yards is measured, or the variation rate of thickness unevenness is measured using a testing machine. A quality control method is used.

(Problem to be Solved by the Invention) However, in the sliver quality control method using the above-mentioned sampling inspection, a small portion of a large amount of sliver spun from a drawing machine is sampled, and the weight fluctuation of the sliver is The quality of all spun slivers is predicted based on the results by measuring the rate of change (gellen variation rate) and weight per unit length. ), it cannot be avoided that the sliver is supplied to the next process, and since the sampling sliver happened to be an abnormal sliver, many of the other slivers were within the control limits (
Even if the sliver is a normal sliver (hereinafter referred to as a normal sliver), it will be treated as an abnormal sliver.

In addition, the abnormal sliver described above directly affects the quality of the spun yarn, especially in a spinning machine such as a sliver-to-yarn spinning machine 1, for example, an open-end spinning machine, and the abnormal sliver directly affects the quality of the spun yarn, such as sliver-to-yarn spinning machine 1, for example, an open-end spinning machine. This will lead to the occurrence of fraudulent systems such as this, and will be a major factor in increasing the number of thread breaks.

Although the cause of the above-mentioned abnormal sliver cannot necessarily be determined, it has been empirically determined that troubles such as fibers wrapping around the roller of the draft roller section (hereinafter referred to as "draft roller trouble") and the amount of supplied sliver introduced into the back roller. Abnormal fluctuations in sliver (hereinafter referred to as supply and sliver troubles) are roughly divided into two types, and the characteristics of abnormal sliver spots caused by these problems have certain trends, and it is possible to determine the cause of abnormal sliver occurrence from the characteristics of sliver spots Almost predictable.

The present invention is capable of checking the quality of all slivers spun from a drawing machine, and through this check, corrective measures are taken to prevent abnormal slivers from being spun, and even in spite of the corrective measures or as described above. If an abnormal sliver is suddenly spun due to trouble with the trough roller, the machine is immediately stopped to prevent the abnormal sliver from being stored in the can, and the cause of the abnormal sliver is predicted and displayed.

Furthermore, it is an object of the present invention to provide a drawing machine that allows the quality of the sliver being spun or the quality of the sliver already spun to be known at a given time.

(Means for Solving the Problems) The present invention provides a drawing machine equipped with an automatic sliver unevenness control device in the draft roller section, in which the actual thickness of the spun sliver being sent out toward the can is continuously controlled. A thickness measuring device is installed below the calender roller of the drawing machine to measure the thickness, and continuous measurement signals from the thickness measuring device are sequentially calculated as the weight of the fixed length sliver spun at predetermined time intervals. The conversion function unit to be converted compares the thickness unevenness data from the conversion function unit with several types of standard thickness unevenness data set and inputted as a program in advance, and determines the unevenness characteristics of the thickness unevenness data of the spun sliver. If the spun sliver's mottling characteristics tend to approximate the abnormal sliver's mottling characteristic data of the standard thickness mottling data, the draft roller unit is commanded to correct the characteristic value of the spun sliver's thickness mottling. A computer that instructs the machine to stop when it determines that the data is abnormal sliver unevenness characteristics based on the standard thickness unevenness data, continuously stores the unevenness characteristic data of the spun sliver, and calculates the thickness unevenness variation rate. It is equipped with a system.

The above computer system basically consists of a CPU that manages the entire system, a CPU that checks the functionality of the flame detector, and a DRA that sequentially inputs converted data.
A measuring tape that can withstand high-speed rotation is used as a spun sliver thickness detector installed below the calendar roller. Ring rollers are applicable.

Further, the reference thickness unevenness data mentioned above may include standard unevenness data of a normal sliver, unevenness data of an abnormal sliver caused by the above-mentioned factors, and the like.

(Function) Continuous measurement signals from the spun sliver thickness detector are converted into irregularity data of a fixed length sliver divided into unit lengths in the conversion function section, and each converted unit length is These data are sequentially and continuously inputted into a computer and compared with the standard data of the normal sliver set in advance as a program and several types of spot characteristic data of the abnormal sliver. Through this comparison, the input data of the spun sliver is compared. When the mottling characteristics are determined and the determined mottling characteristics are predicted to tend to deviate from the standard data, the computer separately commands the draft roller control unit to control the rotation of the back roller. When the spun sliver's mottling characteristics match the uncorrectable mottling characteristic data, the machine is immediately stopped by a signal sent from the computer, the cause of the abnormal sliver is displayed on the CRT, and the data of the spun sliver is displayed. The weight fluctuation rate and U% are calculated while being stored in the computer, making it possible to check the quality of the spun sliver at a given time or to display the operating efficiency and production level of the 81 units.

(Example) To explain an example of the present invention below, in FIG. An air micrometer type detector (4) is provided on the delivery side to detect the thickness of the spun sliver (3), and each detector ( 2) Based on the measured values in (4), the control unit (5) with a built-in computer determines the correction direction, and rotates the back roller (8) via the servo motor (6) and differential gear (7). The spun sliver (3) with a controlled number and unevenness control is fed into the can (10) via a calender roller (9).

The present invention provides a drawing machine equipped with a sliver unevenness control device as described above, including a calendar roller (9) and a can (1).
A measuring device (11) of a meshalling roller type for detecting the thickness of the spun sliver (30) immediately before being accommodated in the can (10) is provided between the measuring device (11) and the can (10). The sliver thickness obtained by
3) with an interface section (14)
Transfer to U (+5). The input signal to the CPU (15) is input to the CPU at the interface section (14).
(+5) is retained while processing data and CP
Wait until U (+5) can be input, and when input is possible, set the timing so that the input signal is sent to CP Ll (15), so that signals can be input continuously at this timing interval. ing. CPU
(+5> performs the following processing on this input signal.

1) Compare the input signal with the standard weight value that has been programmed in advance, the weight fluctuation pattern within the control limits for a normal sliver, and the weight fluctuation patterns of several types of abnormal slivers, and determine whether the spun sliver (30) Continuously check weight fluctuation rate and spot characteristics.

2) When an abnormal tendency is found in the spun sliver (30) by the above check, its mottling characteristics are determined.

It is determined whether control is possible or not by the spot control section of the draft section (1).

3) When the draft unit (1) determines that the speckle characteristics can be controlled, a control command is sent to the control unit (5) of the speckle control device, and the mass detector (2) and the thickness detector (4) ) and the control unit (5), and temporarily differentially operates the servo motor (6) and differential gear (7) based on the above control command to control the rotation of the back roller (8). and spun sliver (30)
weight control to correct abnormal trends in sliver weight.

4) When it is determined that the draft roller section (1) is experiencing uncontrollable irregularities, it immediately issues a stop command to stop the machine.

Based on the comparison of the abnormal spot characteristic pattern with the spot characteristic patterns of the several types of abnormal slivers described above, it is determined whether the cause of the abnormal spot is due to an abnormality in the draft roller section (1), for example, or an abnormality in the supply sliver (31). It will be displayed on the CRT (17) and a warning light (
18).

+5>D RAM<16) has spun sliver<3
0>(7) All weight and spot information is memorized, and it is possible to display when the abnormal sliver occurred on the CRT (+7) or printer (19), or to display it on the machine every 8 hours, for example. Operational data such as efficiency, production volume, stop time, etc. or quality data such as U%9 weight fluctuation rate of the spun sliver are displayed or recorded on a recording disk.

Note that (21) in Fig. 1 is the spun sliver (30).
The CPU is used to check whether the measuring device (11) is in a normal state, and if it is determined that there is an abnormality in the measuring device (11), the machine is immediately stopped.

FIG. 2 is a flowchart showing the software of the computer mentioned above.

(Effects of the Invention) As described above, the present invention provides a drawing machine equipped with an automatic sliver unevenness control device in the draft roller section (1), in which the spun sliver sent out from the calendar roller ( A measuring device (11) for detecting the thickness of the sliver (30) is provided, and a functional unit converts continuous measurement signals from the measuring device (11) into data as the weight of a constant length of sliver spun at predetermined intervals. A computer (15) that constantly determines whether the continuous data of the converted weight information is within the allowable range of a normal sliver and predicts its fluctuation tendency, and a draft roller section (1) according to instructions from the computer (15). The machine is equipped with a control means 5 for controlling the rotation of the back roller (8) and a stop means for the machine, and the weight per unit length of all the spun slivers is checked and converted into continuous data. This is because the rotation of the back roller (8) is controlled separately from the control operation by the next-side regulator arranged in the draft roller section based on predictions of the tendency of weight fluctuation.

Abnormal slivers that exceed the control limits will not be spun unless an unexpected problem occurs such as winding around the draft roller or the supplied sliver breaks, and when an unexpected problem like the one mentioned above occurs, Since it is possible to immediately stop the machine after determining that the abnormality is due to a trouble, it is possible to quickly correct the trouble and also to reliably remove the illegal sliver. In addition, it is now possible to record all information on the weight and unevenness of the spun sliver, and by using a CRT and printer, it is possible to record operational data such as machine efficiency, production volume, and stop time for each operating time, as well as U%9 of the spun sliver. Quality data such as weight fluctuation rate can be displayed or printed out, making it extremely advantageous in improving the quality of spun sliver, confirming quality, and managing operations.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing an embodiment of the invention, and FIG. 2 is a flowchart showing computer software.

Claims (1)

[Claims] In a drawing machine equipped with an automatic sliver unevenness control device in the draft roller section, the drawing machine body is provided with a measuring device (11) for detecting the thickness of the spun sliver (30) sent out from the calendar roller. , has a functional unit that converts continuous measurement symbols from the measuring device (11) into data as the weight of a fixed length of sliver spun at predetermined time intervals, and the continuous data of the converted weight information is converted into data of a normal sliver. A spinning device characterized in that it is equipped with a computer that constantly determines whether it is within an allowable range and predicts its fluctuation tendency, a control means that controls the rotation of the back roller according to instructions from the computer, and a means that stops the machine. A drawing machine equipped with a sliver management device.