JPH0160085B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is a spinning card process in which raw cotton is carded to spin roving for woolen yarn, and the spinning speed of the roving is controlled. It relates to a method for adjusting the weight of roving to a predetermined set value.

(Prior art) In the conventional woolen carding process, the roving that has been spun passes through a hopper feeder, a first card (breaker card), an intermediate feeding device, an intercard, an intermediate feeding device, a capacitor card (finishing card), a capacitor, etc. The weight was measured through a sampling inspection, and the roving weight was corrected by adjusting the roving spinning speed in the condenser based on the measurement results.

(Problems to be Solved by the Invention) In the case of the above adjustment method, the weight adjustment of the roving tends to be inaccurate, and for example, the product rate of the roving (supply If the ratio of roving weight to fiber weight changes over time, the correlation between the measured roving weight and product rate is unclear, making it difficult to adjust the roving spinning speed to an appropriate level. There was a problem.

An object of the present invention is to improve the quality of spun rovings by equalizing the weight of rovings in the woolen carding process, regardless of fluctuations in the product rate of rovings.

(Means for Solving the Problems) The present invention provides a control box for controlling spinning condition settings such as the fiber weight supplied by a hopper feeder, the product rate of roving, the set roving weight, and the number of rovings divided by a capacitor. At the same time, the actual spinning speed data of the roving during spinning is input into the control box and compared with the standard spinning speed, and the data on the capacitor card and the capacitor are calculated. The spinning speed of the roving being spun is corrected to the reference spinning speed by correcting the rotation speed of the motor that controls the speed change based on the comparison result, and furthermore, the spinning speed of the roving being spun is adjusted to the reference spinning speed. The weight of the yarn is actually measured and input into the control box, and from this measured roving weight data, the corrected product rate of the roving being spun is calculated, and the corrected spinning speed of the roving that is adapted to this corrected product rate is calculated. The gist of the present invention is to provide a method for adjusting the weight of the roving yarn, in which the speed of the rotation of the motor is controlled based on the calculated and corrected spinning speed.

(Function) The spinning speed of the roving during spinning is determined by comparing the standard spinning speed of the roving calculated from each spinning standard setting value in the spinning card process with the actual spinning speed data detected by the detector. is corrected to the standard spinning speed, then the weight of the roving being spun at this standard spinning speed is measured, the corrected product rate of the roving is calculated from this measured roving weight data, and this corrected product Correct the spinning speed of the roving according to the rate.

(Example) Next, an example of the apparatus used in the present invention will be described with reference to the drawings.

A woolen carding machine applied to the woolen carding process in which supplied fibers are carded to spin roving for woolen yarn has a hopper feeder 1, a first card 2, an intermediate feeding device 3, an intercard 4, and an intermediate card. Supply device 5, capacitor card 6, and capacitor 7
The fibers supplied from the hopper feeder 1 are sequentially carded by each card 2, 4, and 6, and the web spun from the capacitor card 6 is divided into multiple webs by the dividing roller 8 of the capacitor 7. The belt 9 is divided into multiple pairs of belts 9
~9, passes between each pair of belts 9 while being kneaded, and is bundled and sent out from between each pair of belts 9.The plurality of rovings R~R are sent to winding rollers 10~10. Then they are each wound up.

The continuously variable transmission 11 installed to rotationally drive the dot 6b of the capacitor card 6 and each roller of the capacitor 7 is equipped with a pilot motor 12 for variable speed control of its output rotation, and has an input shaft 11a.
The rotation of the motor 13 that rotationally drives the cylinder 6a of the capacitor card 6 is transmitted via the belt 14, while the rotation of the output shaft 11b is transmitted via the belt, gears, etc. to the dot 6b, the dividing roller 8, and the belt. 9 and are transmitted to the winding roller 10, respectively.

A speed detection detector (pulse generator, rotary encoder) 14 detects the rotation of each winding roller 10 of the condenser 7 in order to detect the spinning speed of the roving R during spinning. The detection signal of the detector 14 is transmitted to a controller 14, which is connected to a controller 14 that includes a calculation section that inputs spinning standard setting values, spinning data, etc., and calculates the spinning speed and product rate of the roving. It is entered in box 15. The calculation results calculated by the calculation section of the control box 15 are transmitted to the power amplifier 16 connected to the pilot motor 12 of the continuously variable transmission 11 via an A/D converter, an amplifier, etc. The speed of the pilot motor 12 is controlled based on the output signal of the power amplifier 16 to adjust the spinning speed of the roving.

Next, a method of adjusting the weight of the roving during spinning using the above-described apparatus will be described.

First, the weight A (g) of the fibers supplied per time fed by the way pan of the hopper feeder 1, the supply time B (sec) per time pan the feeder, the standard product rate C0 (%) of the roving, and the unit length. Each preset spinning condition setting value, such as the set roving weight D0 (m/g) per unit and the number E of rovings to be divided by the capacitor 7, is input into the control box 15. however,
Unit time supplied by hopper feeder 1 (1 minute)
If the weight of supplied fiber per unit is F, then F=A÷B/60
becomes. Further, the product rate is the ratio of the weight of spun roving per unit time to the weight F of supplied fibers per unit time, and is expressed as D0·E×100/F×spinning speed of roving. The standard product rate C0 is for each card 2,
It is set in advance based on the amount of cotton falling off by the cylinders 4 and 6, the needles, each roller, etc., the amount of falling cotton falling off during splitting, evaporated moisture, moisture content of the fibers, etc.

When each of the above-mentioned spinning condition setting values are input into the control box 15, the standard spinning speed V0 (m/
min) is calculated in the calculation section according to the calculation formula V0=C0・F/D0・E×100 and displayed on a display or the like.

Then, when the woolen carding machine starts operating, the spinning speed of the roving being wound by the winding roller 10 is detected by the detector 14, and the measured spinning speed data V1 becomes the reference spinning speed V0. The deviation between the measured spinning speed data V1 and the reference spinning speed V0 is input to the control box 15 for comparison, and the control box 15 calculates a correction signal corresponding to this deviation. The rotation speed of the pilot motor 12 is controlled based on the deviation between the measured spinning speed data V1 and the set spinning speed V0,
The spinning speed of the roving during spinning is corrected to the set spinning speed V0.

Next, the weight of the roving being spun at the set spinning speed V0 is measured by sampling inspection, and the deviation ΔD between the measured roving weight data D1 and the set roving weight D0 is input into the control box 15. , the corrected product rate C1 of the roving during spinning is calculated in the calculation section by C1=V0・E(D0±ΔD)/F・100, and based on this corrected product rate C1 during spinning. Modified spinning speed V2
(m/min) is calculated by V2=F・C1/100/E・D0=V0(D0±ΔD)/D0, and the calculation result of this corrected spinning speed V2 is sent from the control box 15 to the power amplifier 16. The rotational speed of the pilot motor 12 is then corrected, and the roving is spun at a corrected spinning speed V2 that adapts to the corrected product rate C1 during spinning.

Then, by appropriately measuring the roving weight data D1 during spinning and inputting the roving weight data D1 into the control box 15 each time the measurement is performed, the corrected product rate C
1 and the corrected spinning speed V2 are calculated, and the pilot motor 12 is controlled to change the speed, so that the spinning speed of the roving can be adjusted in accordance with the actual product rate of the roving being spun.

However, calculate the deviation ΔC between the corrected product rate C1 and the standard product rate C0, and adjust the corrected spinning speed V2 based on the calculation result of V1=F・(C0±ΔC)/100/E(D0±ΔD) You may also do so.

Next, the operation and effects of the embodiment having the above configuration will be explained.

Now, in this example, the spinning condition setting values such as the fiber weight F supplied by the hopper feeder 1, the roving product rate C0, the set roving weight D0, and the number E of rovings to be divided by the capacitor are input into the control box. At the same time, the measured spinning speed data V1 of the roving being spun is inputted into the control box 15 and compared with the standard spinning speed V0, and the dots on the capacitor card 6 are calculated. 6b and a pilot motor 1 that controls the speed of the capacitor 7.
The spinning speed of the roving being spun is corrected to the standard spinning speed V0 by correcting the rotation speed of step 2 based on the comparison result, and further, the weight of the roving spun at this standard spinning speed V0. is actually measured and input into the control box, and from this measured roving weight data D1, a corrected product rate C1 of the roving being spun is calculated, and a corrected spinning speed V2 of the roving that is adapted to this corrected product rate C1 is calculated.
is calculated and the rotation of the pilot motor 12 is controlled in variable speed based on the corrected spinning speed V2.

For this reason, even if the weight of the roving being spun changes significantly due to changes in the moisture content and short fiber content of the supplied fiber over time, the product rate of the roving being spun tends to fluctuate. By accurately grasping the weight of the roving, the weight of the roving can be accurately corrected to match the actual product rate during spinning, and the weight of the spun roving can be balanced, improving the quality of the spun roving and improving the quality of the product. This has the effect of improving yield.

(Effects of the Invention) In other words, the present invention can control the weight of fibers supplied by the hopper feeder, the product rate of roving, the set roving weight,
Input the spinning condition setting values such as the number of rovings to be divided by the capacitor into the control box to calculate the standard spinning speed of the roving, and also input the measured spinning speed data of the roving during spinning into the control box. The spinning speed of the roving being spun is adjusted to the standard spinning speed by comparing the spinning speed of the roving being spun with the reference spinning speed and modifying the rotation speed of the motor that controls the speed change of the capacitor card and the capacitor based on the comparison result. Adjust the speed, and then measure the weight of the roving spun at this standard spinning speed and enter it into the control box.
From this measured roving weight data, a corrected product rate of the roving being spun is calculated, and a corrected spinning speed of the roving that is adapted to this corrected product rate is calculated, and based on this corrected spinning speed, the motor By controlling the rotation speed of the spinner, the fluctuation trend of the product rate during spinning can be accurately grasped, and the weight of the roving can be accurately corrected to match the product rate during spinning, thereby increasing the weight of the spun roving. This has the effect of improving the quality of the spun roving by evening out the roving.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the roving adjustment method of the present invention, FIG. 2 is a side view of a woolen card machine, and FIG. 3 is a side view of a capacitor card and a capacitor. 1... Hotpuff feeder, 7... Capacitor, 12...
Pilot motor, 15...Control box, C0...Standard product rate, C1...Corrected product rate, D0
...Set roving weight, V0...Reference spinning speed, V2...Corrected spinning speed.

Claims (1)

[Claims] 1 Enter the spinning condition settings such as the fiber weight supplied by the hopper feeder, the product rate of roving, the set roving weight, and the number of rovings divided by the capacitor into the control box to set the standard spinning speed of roving. At the same time, the measured spinning speed data of the roving being spun is input into the control box and compared with the reference spinning speed, and the rotational speed of the motor that controls the speed of the capacitor card and the capacitor is compared with the above. Based on the results, the spinning speed of the roving being spun is corrected to the standard spinning speed, and the weight of the roving spun at this standard spinning speed is actually measured and input into the control box. Then, from this measured roving weight data, a corrected product rate of the roving being spun is calculated, and a corrected spinning speed of the roving that is adapted to this corrected product rate is calculated, and based on this corrected spinning speed. A method for adjusting roving weight in a woolen carding process, characterized in that the rotation of the motor is controlled at variable speeds.