JPS58132127A - Method for removing variation in weight of one lap and weight in long direction of lap and apparatus therefor - Google Patents

Abstract

PURPOSE:To form laps without the variation in weight, by setting an adjusting standard draft based on the difference value from the standard weight of one lap, and adding the draft ratios set to compensate the trend value of the variation in the weight in the long direction thereof successively to the laps. CONSTITUTION:The weight of one lap is weighed by a weighing apparatus, and compared with the upper and lower limit set values by a comparator. If the weight is within the upper and lower set limit values, it is compared with a set median weight value by a comparing arithmetic unit. The deviation value is then used as a basis to calculate the adjusting standard draft, which is then input to a draft ratio proportion control mechanism (B). A draft ratio for removing the variation in the weight in the long direction of the lap is memorized in a memory apparatus, and signals corresponding to the draft ratio necessary according to the progress of the lap to be treated in a drafting part are given to a draft ratio changing mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and placement for eliminating single wrap and longitudinal weight variations.

There are weight variations in the slivers or wraps used in spinning mills. This weight fluctuation can be broadly divided into long-period weight fluctuation and short-period weight fluctuation.

This is done in a wrap former machine, such as a cotton comb machine. In the case of a sliver wrap machine or a ribbon machine, which is a preparation machine, the length of each wrap is set to a constant length by a counter, so the long-period weight fluctuation is due to the difference in weight of one wrap formed by a wrap-hummer machine. This appears as a real weight fluctuation, while the short period weight fluctuation appears as a weight fluctuation in the longitudinal direction of the wrap.

The fluctuations in the weight of each wrap are caused by long-term fluctuations in the weight of the raw material supplied to the wrap former machine. Particularly in modern spinning mills where the cotton blending process and the carding process are continuous, there is a tendency for the slivers of all the carding machines connected to one series of cotton blending devices to become heavier or lighter all at once. Therefore, there is a tendency that the wrap of a wrap former machine made using this sliver will continue to be heavy for a while if it becomes heavier, or it will remain lighter for a while if it becomes lighter. If such long-period weight fluctuations are left unattended, they will eventually lead to fluctuations in yarn count, so they must be removed. However, this weight fluctuation occurs over a long period and occurs for all lots connected to one line of cotton blending equipment.
I am also considering a method in which weight fluctuations that cannot be removed by doubling can be corrected by taking a sample from the carding machine or preparing machine, measuring it, and replacing the gears on the carding machine or preparing machine. In reality, this method cannot be adopted due to the large amount of work involved and the inability to obtain appropriate timing for measurement, and therefore, the current situation is that long-period weights have no choice but to be dilated. be.

On the other hand, the weight fluctuation in the longitudinal direction of the whelk is a phenomenon caused by the illegal draft that occurs when the wrap, which has a low binding force between the fibers, is placed on a pair of crease rollers and wound up.

In other words, when the diameter of the lap is small, the knob is affected by the grooved roller, and as a result, the wrap becomes thinner.On the other hand, as the diameter of the lap becomes larger, the effect of the grooved roller is weakened, causing the rough draft. This is difficult to occur, and as a result, the wrap does not become thin.The tendency for the thickness of the wrap to change due to this irregularity differs depending on the lap former machine even when the same raw material is lap-formed under the same conditions.

This is a characteristic of the so-called lap 7 ohming mechanism.

In other words, it is a weight fluctuation due to the peculiarities of the machine.

As mentioned above, if a wrap with weight variation in the longitudinal direction is processed by a combing machine, the weight variation of the wrap supplied to the sliver after being combed will naturally be shifted, and the combing process and subsequent processes will be affected. Even if there is some compensation by the doubling operation in , the weight fluctuation of the wrap ultimately has the disadvantage of reducing the uniformity of the yarn.

Therefore, conventionally it has been necessary to use the wraps randomly in the combing process to compensate for variations in the longitudinal weight of the wraps.

It is an object of the present invention to eliminate the above-mentioned drawbacks of the conventional wrap 7-ohm machine and to form a wrap in which single-wrap weight fluctuations and longitudinal weight fluctuations are eliminated using each wrap former machine.

The purpose of the present invention is to weigh the weight of one wrap formed by a wrap form machine, compare the weighed value with the standard weight of one wrap, detect the difference, and calculate the difference based on the difference. The standard draft ratio of the drafting means of the lap former machine is adjusted to set the adjusted standard draft, and on the other hand, the characteristics of the lap 7 ohming mechanism in the tube former machine and the change in the outer diameter of the lap when winding the lap make it possible to adjust the standard draft. The trend value of the longitudinal weight fluctuation of the t-image is measured, and a draft ratio set to cancel the trend value is sequentially added to the adjusted draft ratio of the drafting means of the lap former machine as the lap forming progresses. This is accomplished by eliminating the longitudinal weight fluctuations of the wraps that occur in the wrap former machine together with the fluctuations in the weight of each wrap due to the setting of the adjustment reference draft ratio.

In order to compare the method of the present invention with the adjustment of the weight of the wrap in a conventional wrap 7-ohm machine, the method will be described below with reference to the drawings. That is, FIG. 1 is a diagram for explaining a method for eliminating single-wrap weight fluctuations and longitudinal weight fluctuations of the present invention.

Three stages of adjusting the draft ratio according to the winding of the wrap when carrying out the method of the present invention are shown side by side, and the horizontal axis direction is from the beginning of winding to the winding end of one wrap for each stage. shows. The stage indicated by 8D in FIG. 1 indicates the standard draft ratio of the draft bar in the lap former machine, which is the difference in weight per unit length between the supplied sliver or wrap and the processed wrap, as is known. It is determined by the following. If a wrap of the desired weight cannot be obtained, work such as gear replacement is performed to change the reference draft ratio. That is, in FIG. 1, if a wrap of the desired weight per unit is obtained by spinning at the standard draft ratio a1, the standard draft ratio is manually changed to a2 or a3. This operation is a method that has been carried out in conventional textile mills, and is carried out relatively frequently due to the difference in draft effect due to the influence of temperature and humidity in the mill. Note that when the target weight of a single wrap changes, it is necessary to significantly change the standard draft ratio as shown by alO in FIG. Among the methods of the present invention, the method for eliminating the weight fluctuation of one wrap, which will be described later, is to automate the work of manually changing the standard draft ratio alwo to a2 or a3 in FIG. Do not make significant changes up to fL110 in one part of the draft parts as described below as there is a risk of degrading the quality of the wrap.

This is done by replacing gears as before.

In FIG. 1, the stage indicated by A indicates the ninth stage for eliminating single-wrap weight variations, and the stage indicated by B indicates the stage for eliminating longitudinal weight variations of the wraps.

First, in stage B, the song 1salW1. alW2. a
lW3 and alW4 are shown. This curve serves as a model to show the weight variation per unit length of one wrap in the longitudinal direction. As mentioned above, this is the longitudinal weight variation of the wrap that occurs as the wrap is wound, and this curve differs depending on the wrap former machine, that is, depending on the habits of the machine. This curve has various aspects as shown in FIG.

Usually the curve alWIKIH, 7 is the shape with 2 protrusions 7
Depending on the machine, the deviation from the center line indicated by the dashed-dotted line is varied along the length of the tube wrap.

The method of removing the longitudinal weight fluctuation of the wrap in the present invention is to calculate the trend value of the longitudinal weight fluctuation of the wrap.

For example, a nine curve denoted by alWl is obtained by measurement.

The draft ratio of the draft part of the lap former machine is automatically changed in accordance with the formation of the lap so that this tendency value can be canceled to obtain the weight per unit length corresponding to the center line of the mate shown by the dashed line. It is. As a result, it is possible to obtain a wrap with a uniform weight per unit length over the entire area from the start to the end of the wrap.

Next, in stage C, the curves alW1bl, alW1b2
and alW1b3 are shown. Although the shapes of the respective curves are the same, the center weights indicated by the dashed lines are different. This difference in center weight corresponds to the difference in the amount of electricity per wrap of the above-mentioned wraps. As mentioned above, in the wrap 7-ohm machine, variations in the weight of the feed material, ie, the supplied sliver or two pieces, cause variations in the weight of one wrap. Therefore, if the processed wrap is supplied to the next process with this variation in weight of one wrap as it is, even if the longitudinal weight variation in one wrap is removed in step B, the effect will be removed by doubling in the next process. It will be erased. Therefore, in the method of the present invention, in addition to the step of removing the weight fluctuation in the longitudinal direction of the wrap in step B, the weight fluctuation of one wrap is removed. In other words, each time a wrap is formed using one Wrap Four machine, the wrap is weighed and the weight of each wrap is measured, and the weight value of each wrap is compared with the target weight value of one wrap, that is, the standard weight of one wrap. The difference value is detected, and based on this difference value, the standard draft ratio of the draft part of the lap 7-oh machine that has been clearly set is adjusted to set an adjustment standard draft ratio, and based on this adjustment standard draft ratio, stage B This method eliminates the longitudinal weight fluctuation of the two tubes. To explain this using Figure 1, if there is no change in the weight of one wrap, step B is performed using the curve alW1bl, and if there is a change in the weight of one wrap, the standard draft ratio is adjusted to 1kW4 as shown in the curve alW1b2 or &IW1b3. do.

In addition, in stage B, a tolerance range is set for the variation in the weight of one piece,
It is preferable to issue a warning when a lap with a weight exceeding the allowable range Bt-91 occurs, and to stop the lap 7-ohm machine if necessary. If this exceeds the allowable range, there is a cause such as sliver breakage on the feed material side, so this can be eliminated.On the other hand, changing the standard draft ratio to an extreme in one part of the draft part is a new problem. This is because it is undesirable as it may lead to the occurrence of draft spots.

Further, it is not necessarily necessary to adjust the reference draft ratio for each lap. If the operation of the lap former machine is stable, dotting may be performed every few work shifts or every day.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the apparatus for eliminating single-wrap weight fluctuations and longitudinal weight fluctuations of the present invention will be described in detail below with reference to the accompanying drawings.

The device for eliminating weight fluctuations in one wrap and longitudinal weight fluctuations of the present invention includes a standard draft ratio adjustment mechanism that sets an adjustment standard draft ratio in order to eliminate weight fluctuations in one lap, and a standard draft ratio adjustment mechanism for the standard draft ratio adjustment mechanism. and a draft ratio control mechanism that eliminates longitudinal weight fluctuations of the wrap with reference to the adjusted reference draft ratio.

FIG. 2 shows a block diagram of an embodiment of a device for eliminating single-wrap weight fluctuations and longitudinal weight fluctuations of the present invention. The part surrounded by the broken line A in FIG. 2 shows the block diagram of the standard draft ratio adjustment mechanism, and the part surrounded by the broken line B
The part surrounded by indicates the draft ratio control mechanism.

The reference draft ratio adjustment mounting A is composed of a weighing device, a comparator, a comparison calculator, and an alarm device. The weigher is a device that weighs the weight of a single wrap that has been wound to a certain length by the winding means of the wrap former machine and dotted after dotting.Weighting is performed for each dotfing, and the weighed value is compared as an electrical signal. output to the device. Upper and lower limit values for the weight of one wrap are set in the comparator. The comparator is a device that compares the electric signal input from the scale with the upper and lower limit set values, and outputs a signal to the alarm device if the electrical signal is outside the upper and lower limit set values. The warning device includes a flashing lamp and/or a warning buzzer, and also has a signal transmitting device for stopping the drive device of the lap former machine.

On the other hand, if the signal from the weighing device is within the upper and lower limit set values, the signal is output to the comparator.

A center weight setting value corresponding to the target weight per unit length of the wrap formed by the two-tube machine is set in the comparator. The comparator is a device that receives input from the comparator, compares it with the set value of the center weight of the skin electrical signal, and calculates and outputs the deviation value as a weighted average of the values measured up to the previous time in a geometric series. It is. The output from the comparator is input to the draft ratio control mechanism B.

As mentioned above, in the standard draft ratio adjustment mechanism, the deviation value between the weighed value of one wrap formed by the wrap former machine and the center weight setting value corresponding to the target weight per unit length of the wrap is calculated up to the previous time. The reference draft ratio used in the draft ratio control mechanism is adjusted because the following values are weighted and averaged in a geometric series and output to the draft ratio control mechanism. For example, if the weighed value of one wrap is 3es heavier than the center weight set value, the draft ratio control mechanism is set to operate based on the adjusted standard draft ratio that is 3% higher than the standard draft ratio. In this case, if there is a large difference in the measured value of the weight of one lap formed by the Wrap 7 Ohma machine with respect to the center weight setting value, the adjustment standard draft ratio will be significantly different from the standard draft ratio. Become. The draft mechanism of the lap former machine has a standard draft ratio set so that the supplied sliver or wrap can be properly drafted, so drafting is performed using an adjusted standard draft ratio that is significantly different from the standard draft ratio. If this happens, draft unevenness will occur on the formed wrap. Since it is not desirable for such a draft to occur, the comparator of the reference draft ratio adjustment mechanism is configured to have upper and lower limit set values so that the lap 7-ohm machine stops in a range where proper draft cannot be guaranteed. has been done. In this embodiment, the upper and lower limit set values are set within ±2-2 by weight of one wrap.

If the upper and lower limit set values are exceeded, this is because the weight of the sliver or wrap supplied as a weight is not as specified, so the sliver or wrap may be removed or adjusted.

Next, the draft ratio control mechanism B will be explained. As shown in FIG. 2, the draft ratio control mechanism B consists of a storage device, a draft ratio changing mechanism, and a storage device operating mechanism.

A draft ratio for eliminating longitudinal weight fluctuations of the wrap is stored in the storage device. Then, the required draft ratio is adjusted according to the progress of the lap processed in the draft part by receiving instructions from the storage device from the storage device operating mechanism which is linked to the rotation of the main motor that drives the entire lap former machine. A corresponding signal is issued to the draft ratio changing mechanism. The draft ratio stored in the storage device means that the wrap 7 of each two-tube machine is equipped with a device for eliminating weight fluctuations and longitudinal weight fluctuations of the present invention.
Characteristics of the ohming mechanism, that is, the tendency of the weight variation in the longitudinal direction of the wrap that occurs due to the characteristics of the wrap former machine and the change in the outer diameter of the wrap during lamp winding. This is the draft ratio determined to cancel this tendency value.

An example of the tendency value of the longitudinal direction weight fluctuation of the wrap is shown in FIG. 3. In FIG. 3, the vertical axis shows the weight per unit length of the wrap, and the horizontal axis shows the length of the wrap in the longitudinal direction.

In the example shown in FIG. 3, the wrap gradually becomes heavier from the beginning, becomes heaviest near the end, and then becomes lighter again. Therefore, the draft ratio stored in the storage device may be set so that the weight per unit length of each portion of the wrap becomes the average weight per unit length shown by the dashed line 22 in FIG. In Fig. 3, when the portion of the lap corresponding to the portion indicated by 1 to 4 on the horizontal axis is processed by the lap 7-ohm machine, a lower draft ratio than the standard is given corresponding to the curve 21; When the lap portion corresponding to the portion indicated by 5 to 10 is processed by a 2-tube 7-o-one machine, a draft ratio p higher than the standard is given corresponding to the song @21. The draft ratio may be set so that the weight per unit length is as shown by the dashed line 22 over the entire length of the wrap.

The draft ratio may be stored continuously or intermittently. In other words, in the case of continuous recording, for example, the curve 21 shown in FIG. 3 is taken as the memorized draft ratio, one curve 21 is sequentially followed by a phototube, and the change in the vertical direction in FIG. 3 is taken out from the storage device as an electrical signal. In the case of intermittent recording, the longitudinal direction of the wrap is divided into a plurality of parts to grasp the trend value, and the same number of storage elements as the number of the divided parts are provided in the storage device, and each storing a draft ratio for canceling the tendency value of each divided portion in a storage element;
As the lapping process progresses, corresponding draft ratios may be sequentially extracted from the memory element as electrical signals.

The draft ratio changing mechanism is a mechanism that adds the signal from the reference draft ratio adjusting device A to the signal from the storage device and changes the draft ratio of the draft part upon receiving the signal. FIG. 4 shows an embodiment of the draft ratio changing mechanism.
The draft ratio changing mechanism in FIG.
, a control motor mechanism 39,80, and a differential gear 42. The motor control unit 38 is a mechanism that amplifies a signal from the storage device, that is, a voltage value in this case, and transmits the amplified signal to the control motor mechanism. The control motor mechanism includes a control motor 39 and a deceleration 4.
It consists of mechanical coupling means such as 1!40.

The control motor 39 is amplified by the motor control unit 38 to generate a rotational force at a required rotational speed corresponding to the external voltage, and one mechanical coupling means transmits the rotational force to the differential gear 42 . In addition to the aforementioned rotational force from the control motor 39, the differential gear 42 receives a rotational force set to give the draft part a standard dot ratio. That is, as shown in FIG. 4, an input shaft 41 is connected to one end of a differential gear 42, and the rotational force from the main motor is applied to the input shaft 41 through a plurality of mechanical coupling mechanisms to adjust the reference draft ratio of the draft parts. The rotation speed is converted to correspond to the given rotation speed. As a result, the rotational speed becomes a combination of the rotational speed of the output shaft 43 of the differential gear 42 and the rotational speed of the rotational force from the main motor. This combined required eye rotation speed is given to the dredge part.

As is well known, the draft part of the lap former machine is composed of a plurality of pairs of draft rollers. The combined rotational speed is applied to one pair of draft rows, usually a back bottom roller, among the plurality of pairs of draft rollers. On the other hand, the other draft rollers are rotated by the main motor via a predetermined mechanical connection mechanism. Therefore, the combined rotational speed is the reference draft ratio adjusting device A.
The total draft of the lap passing through the draft part changes accordingly, as it changes according to the draft ratio stored in the storage device and set to cancel the trend value of longitudinal weight fluctuation of the next lap. .

The storage device operating mechanism is a device for instructing the timing of retrieval of a corresponding draft ratio from the storage device during the formation of one wrap. When the draft ratio is stored continuously as described above, for example, a curve 21 as shown in FIG. 3 is drawn, and the paper is transferred from the main motor through the mechanical linkage mechanism to the curve 21 corresponding to the winding start to the end of the wrap. Alternatively, the paper may be fixed and the phototube may be moved relative to the paper in accordance with the winding of the wrap.On the other hand, when the paper is stored intermittently as described above, For example, a trap can be implemented by attaching a pulse generator to any part of a lap 7-ohm machine that is linked to the rotation of the main motor, and counting the pulses from the pulse generator with a counter.
The configuration may be such that a signal is retrieved from a storage element in the storage device every count value corresponding to the interval of the intermittent recording.

Since the method and apparatus for eliminating single-wrap weight fluctuations and longitudinal weight fluctuations of the present invention are constructed as described above, weight fluctuations per unit length within one wrap are eliminated, and one-wrap weight fluctuations are eliminated. This also means that weight fluctuations from time to time are also removed. However, the long-term symmetry of yarn spun from wraps made using the method and apparatus of the present invention is very poor.

[Brief explanation of the drawing]

FIG. 1 is a diagram comparing and explaining the basic structure of the lug weight in a lap 7-ohm machine between a conventional method and the method of the present invention, and FIG. 2 is a block diagram of an embodiment of the device of the present invention. , Fig. 3 Fi is a graph showing the trend value of the longitudinal direction weight fluctuation of the wrap;
This figure is a diagram showing an example of the draft ratio changing mechanism used in the electrical production of the present invention shown in FIG. 2. In the figure, A is a reference draft ratio adjustment mechanism, B is a draft ratio control mechanism, 21 is a curve showing the longitudinal weight fluctuation of the wrap, 22 is a straight line showing the average weight per unit length, 38 is a motor control section, and 39 is a control motor, 40 is a speed reducer, 41
Reference numeral 42 indicates an input shaft of the driving force from the main motor, 42 indicates a differential gear, and 43 indicates an output shaft of the differential gear. Figure 1 B A

Claims (1)

[Claims] 1. A method for eliminating single-wrap weight fluctuations and longitudinal weight fluctuations in a wrap former machine that forms wraps by doubling, drafting, and winding slivers or wraps. The method is that the wrap is formed in a 7 ohm machine and then 1 of 2 tubes is formed.
Weigh the actual weight, compare the measured value with the standard weight of one wrap, detect the difference value, and adjust the standard draft ratio tX of the drafting means of the wrap former machine, which is set based on the difference value. and setting the adjustment standard draft, and the characteristics of the lap forming mechanism in the lap forming machine and the trend value of the longitudinal weight fluctuation of the wrap that occurs due to the change in the outer diameter of the wrap when winding the wrap are collected and measured. A draft ratio set to cancel the trend value is added to the adjustment standard draft ratio of the drafting means of the wrap former machine as the wrap formation progresses, and the longitudinal length of the wrap generated in the 7-ohm wrap machine is determined. and removing directional weight variations. 2. Sliver or wrap doubling means. One of the wraps in a lap former machine comprising a sliver or wrap drafting means and a wrap winding means.
In this device for eliminating weight fluctuations and longitudinal weight fluctuations. The device sets an adjusted reference draft ratio to remove one weight variation tube of the wrap; removes the longitudinal weight fluctuation of the wrap with the adjusted reference draft ratio from the reference draft ratio adjustment mechanism and the cough reference draft ratio adjustment mechanism as a reference; It consists of a draft ratio control mechanism. The standard draft ratio adjustment #! The barrel includes a weighing device, a comparator, a comparison calculator, and an alarm device. The weighing device is a device that weighs the weight of one wrap that has been wound to a predetermined length by the winding means and dotted, and outputs the weight as an electric signal to the comparator. The comparator includes a storage means for retrieving and storing the upper and/or lower limit weight values of one wrap provided at a predetermined width with respect to the desired weight of one wrap, and the comparator receives an electric signal from the weighing device. The weight value of 9 wraps is compared with the upper limit or lower limit weight value of 1 wrap in the storage means, and when the weight of 1 wrap is within the predetermined width, an electric signal is sent to the comparison calculator. The device outputs a signal, and outputs an electric signal to the alarm device when the weight value of one lap is outside the predetermined width, and the comparator calculates the desired weight value of one lap. A device that includes a storage means for storing the data, compares it with the electric signal from the comparator, calculates an adjustment reference draft ratio by weighting the deviation value in a ratio series, and outputs the result to the draft ratio control mechanism. The alarm device is a device that receives an electrical signal from the comparator and issues a signal to stop driving the lap former machine. The draft ratio control mechanism includes a storage device, a storage device activation mechanism that outputs a signal for activating the storage device, and a draft ratio changing mechanism that operates based on the signal from the storage device, and the storage device is used in a lap fork machine. One of the wraps characterized by memorizing the characteristics of the wrap forming mechanism and the draft ratio set to cancel the tendency value of the longitudinal weight fluctuation that occurs due to the change in the outer diameter of the wrap when winding the wrap. Device for eliminating weight fluctuations and longitudinal weight fluctuations. 3. The alarm device is provided with a lamp and/or a buzzer that is activated in response to a signal from the comparator to eliminate single weight fluctuations and longitudinal weight fluctuations of the wrap according to claim 2. Device.