JPH06280118A - Apparatus in carding of textile fiber such as cotton and chemical fiber - Google Patents

Abstract

PURPOSE: To enable a carding machine to have a specially high feeding speed (production) without damaging or tearing a fiber sheet on rollers even if the feeding speed is temporarily reduced (spinning initiation, start, stop, replacing work). CONSTITUTION: Rollers in a doffer zone are driven by the motor provided with an electronic control/adjusting unit having a target value adjusting means, the tachometer 25 connected to a motor adjusting devices 20, 24 cooperates with rollers 5, 6 in the doffer zone, the speed varies in accordance with the variation of the rpm of the motor 19 in the doffer zone or the like and a specific draft is adjusted. Rollers or roller pairs in the doffer zone are driven by two or more motors which are provided with the motor adjusting device and are respectively independent. The tachometer in cooperation with the motor is connected to the draft adjusting means automatically amending the draft between rollers or roller pairs independently driven based on the tachometer when the feeding speed is varied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller of a doffer area driven by an electric motor having an electronic control and adjusting unit and a target value adjusting means, and a change in supply speed is performed, for example, by a change in the rotation speed of the electric motor with respect to the doffer area. The present invention also relates to a production control device for a card of textile fiber such as cotton and chemical fiber, which is capable of adjusting the draft of the fiber material.

[0002]

2. Description of the Related Art Known devices (German Patent Publication No. 29)
No. 44428), a first electric motor control means is associated with the doffer, which consists of an electronic tachometer, an electronic motor adjuster and an adjusting electric motor driving the doffer (including the rollers in the doffer area). The electronic motor controller consists of a rotation speed controller and a current controller attached to it. The target value adjusting means of the production speed corresponding to the rotation speed of the doffer, for example, the potentiometer, is connected to the electronic motor controller via the target value preselector. The first motor controller for the doffer is connected via an electric shaft to the second motor control for the Ford rollers. The second motor control is an electronic tachometer, an electronic motor controller that works with Ford Roller,
And an adjusting electric motor for driving the feed roller.
Target value adjusting means for the feed roller, for example a potentiometer for adjusting the draft, is connected to the electronic motor controller via the target value preselector. The electronic tachometer for the doffer and the electronic motor controller for the doffer are connected with the electronic motor controller for the feed roller (electric shaft) via a setpoint preselector for the feed roller.

The feed rate (eg 150 rpm) is equal to the peripheral speed of the delivery roller after the web funnel or in the Kenscoyler. The supply speed depends on the rotation speed of the doffer. The draft (eg, 100 times) is equal to the quotient of the peripheral speed of the delivery roller and the peripheral speed of the feed roller (DIN64
All drafts according to 080). The total draft is the sum of multiple individual drafts, for example, the draft between the delivery roller and the doffer and the draft between the doffer and the feed roller.

In the case of known equipment and reconditioning (eg item exchange), a certain total draft (eg 100%) is adjusted and maintained during operation. To this end, a potentiometer is provided which is connected to the electronic motor controller for the feed roller. At the same time, all individual drafts are adjusted, for example 23% draft between the delivery roller and the nip roller. Unlike the draft, the feed rate (production) can change during operation. Feed rates range from high maximum rates during production to relatively low rates at start and stop to low feed rates at the start of spinning. Even if the feed rate changes in this way, the draft initially adjusted is constant. In other words, even if the supply rate changes,
The draft, that is, all drafts and individual drafts, does not change. The feed roller is connected by an electric shaft,
It rotates synchronously at a specific ratio to the doffer.

[0005]

Large drafts are required in order to achieve high feed rates for the purpose of high production. If a large draft for operation with a high feed rate is maintained even at a low feed rate (eg spinning start), the fiber sheet (fleece) on the rollers will tear at the low feed rate. This is because the draft is too large in this speed range. The problem is all the more significant the initial speed of the card is from the final speed. This problem limits the maximum speed of the card and therefore also the maximum production.

The object of the present invention is to avoid the above disadvantages and to prevent the fiber sheet on the roller from being damaged or torn even if the supply speed is temporarily reduced (spinning start, start, stop, replacement work). To provide a device which allows a particularly high feed rate (production).

[0007]

According to the present invention, the above object is characterized in that a roller or a pair of rollers in the doffer area can be driven by two or more independent electric motors each having a motor controller, and the supply speed can be changed. Draft adjusting means for automatically correspondingly changing the draft between the independently driven rollers or roller pairs is provided.

The measures of the present invention provide for automatic draft changes at various production rates. These drafts are automatically changed in different areas of the card between the delivery roller and the doffer according to a special characteristic curve depending on the production speed. As a result, a small draft (eg 15%) is obtained at a low production rate, and a large draft (eg 55%) is obtained at a high production rate of 300 rpm or more. With this construction, the large draft required for high production is reduced at low production rates so that the fleece does not tear at low speeds. In particular, the maximum speed of the machine and thus the maximum production is increased even if the initial speed of the machine is separated from the final speed. Advantageously, this makes it possible to increase the production by adapting the draft to different speeds between the initial speed and the maximum speed as the rotational speed changes.

It is preferred that the doffer and stripping rollers can be driven by one electric motor and the nip roller and delivery roller can be driven by another electric motor.
By doing so, the fibrous sheet does not break or tear on the stripping roller in the critical range. It is advisable to have a separate motor drive the roller (calendar roller) for the Kenscoyler. The tachometer is connected to an electronic control and adjustment unit (microcomputer) that changes the speed of one motor or another motor in the doffer area when the roller speed of one roller or roller pair changes. Is preferred. This electronic control / adjustment unit has a storage means for storing the dependency between the rotation speed measured based on the tachometer of the roller or the roller pair and the rotation speed of the roller in the doffer area to be adjusted. It is a good idea to do it. Conveniently, a corresponding dependency curve is stored for each motor for the other roller or other roller pair. Advantageously, an electrical signal for adjusting the speed of rotation is sent from the electronic control and adjusting unit to a motor controller associated with each motor. It is preferable that the electric signal for the change of the rotation speed is the changed target rotation speed. Advantageously, another electric motor drives the calender roller of the Kenskoyler. It is preferred that the tachometer be associated with an electric motor for the delivery roller.

In another solution, the rollers or pairs of rollers in the doffer area can be driven via a continuously variable transmission by an electric motor with an electric motor adjuster, and a tachometer associated with the electric motor draft adjusts. When the roller speed changes, the draft adjusting means automatically changes the draft between the rollers or roller pairs driven independently of each other based on the tachometer. There is. In this case, it is preferable that a servomotor is associated with the transmission for adjustment.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 shows a feed roller 1, a feed table 2, a take-in 3, a cylinder 4, a doffer 5, a stripping roller 6, nip rollers 7 and 8, a fleece guide member 9, a web funnel 10, delivery rollers 11 and 12, and a rotary flat 13. Cards provided, eg EXACTACA from Trutschler
RD DK760 is represented. A tachometer 14 is associated with the feed roller 1. The tachometer 14 adjusts the electric motor 15 that drives the feed roller 1 via the electric motor adjuster 16. The target value selector 17 is pulsed through a potentiometer 18 which is connected to the motor controller 16.

The motor controller 24 is a delivery roller 11.
And 12 electric motors 23 and an electronic control and adjustment unit microcomputer 26. In addition, the microcomputer 26 is a motor controller 20.
The electric motor 19 of the doffer 5 is controlled via. That is,
As is clearly shown in FIG. 2, the doffer 5 and the stripping roller 6 are directly driven by the electric motor 19. On the other hand, the electric motor 23 uses the nip rollers 7 and 8
And drive the delivery rollers 11 and 12. calculator,
That is, the information (signal 38) sent to the microcomputer 26 is input to the means 39 for storing the supply speed.
The means 39 is connected to the means 40 for designating the number of rotations for the delivery rollers 11 and 12. Further, the means 39 is connected to the draft adjusting means 22. The draft adjusting means 22 evaluates the feed rate as shown in the trend curve of FIG. The optimum draft range corresponding to the supply speed is obtained by comparing with the curve obtained based on experience, and the new speed of the doffer 5 based on this is calculated in the speed calculation means 21 according to FIG.

In FIG. 5, the range in which satisfactory operation can be performed at various feeding speeds and the corresponding drafts (individual drafts between the delivery roller and the doffer) is shown by hatching. FIG. 6 is a system configuration diagram of the control of the doffer 5. The electric motor 23 is the lower delivery roller 1
2 is driven and is connected to the tachometer 25. The tachometer 25 itself is connected to the motor regulator 24 and a calculator, or microcomputer 26. The electric motor adjuster 24 is used to normally control the electric motor 23, that is, to keep the rotation speed of the electric motor constant during normal operation. A similar thing is done by the tachometer 31. The tachometer 31 is connected to the electric motor 19 of the doffer 5 via the electric motor controller 20. However, the tachometer 25 is given a more important problem. That is, the tachometer 25 also fulfills the function of sending data to the microcomputer 26 as described above.
These data are evaluated there and sent to the motor 19 of the doffer 5 via the motor controller 20 and the draft is adjusted by the change in the rotational speed.

In FIG. 7, there are two kinds of speeds, namely, a spinning start speed (10 m / min) and a normal feeding speed (250 m / mi).
For n), the course of the curve is shown, the following table shows the feed rate,
Shows the relationship between draft, delivery roller rotation speed, and doffer speed. Feed rate (m / min) Draft 250 10 (%) Delivery roller speed (rev / min) 1100 44 25 Doffer speed (rev / min) 90 10 8 When the feed rate decreases in the spinning process, the microcomputer 26 automatically The speed is adapted and the draft corresponding to this speed is specified.

Instead of controlling the draft at one location, the draft control can be performed at multiple locations or at another location by providing a separate motor to the rollers, which conventionally has a fixed gear ratio.
Of course it is also possible to do it in one place. These possibilities are illustrated in Figures 8-13. For example, in FIG. 8, the stripping roller 6 driven by the electric motor 28 can be independently adjusted. In this case, the tachometer 31 or 31 'is associated with both the electric motor 28 and the electric motor 19 which drives the doffer 5. These tachometers can be used for both regulation and control.

FIG. 9 contains another section. Here, the nip rollers, namely the upper nip roller 7 and the lower nip roller 8, can be driven and adjusted independently of each other. According to FIG. 10, the doffer 5 and the stripping roller 6 are driven by one electric motor 19. That is, they rotate at a constant draft ratio. Similarly, the nip rollers 7, 8 and the delivery rollers 11, 1
Two roller pairs are also grouped together. That is, draft adaptation can occur between these two components.

In FIG. 11, the doffer 5 is individually driven by the electric motor 19 and all the rollers in the latter stage are combined. The desired draft adaptation here takes place between the doffer 5 and the stripping roller 6. Similar to this, in FIG. 12, the draft is two roller pairs, an upper nip roller 7 and a lower nip roller 8,
Upper delivery roller 11 and lower delivery roller 12
Can be adjusted between What is common to all FIGS. 8 to 12 is that the Kenscoyler 27 and the calendar rollers 35, 36 arranged thereon are also driven.
In the section shown in FIG. 13, the delivery roller 11,
12 and the calendar roller 35 in the Ken Coyler 27,
You can also draft with 36. For this purpose, the motor 30 of the Kenscoir 27 must be connected to the microcomputer 26. Similarly, other electric motors, that is, the electric motor 23 that drives the delivery roller 12 or the delivery roller pairs 11 and 12, the electric motor 29 that drives the nip roller pairs 7 and 8, the electric motor 28 that drives the stripping roller 6, and the electric motor 19 that drives the doffer 5. , Must be connected to the microcomputer 26.

14 to 16 show the prior art, it goes without saying that the basic members are the same as above. The electronic tachometer 14 associated with the feed roller 1
It is used in connection with the electric motor adjuster 16 to adjust the rotational speed of the electric motor 15 that drives the feed roller 1. Similarly, the tachometer 31 is used to adjust the rotation speed of the electric motor 19 which drives the doffer 5 via the electric motor controller 20. Further, it is possible to adjust the specific rotation speed of the feed roller 1 and the doffer 5 via the target value adjusting means 32 and the target value preselector 33 or the target value adjusting means 18 and the target value preselector 17. However, the draft once adjusted to 23 to 34% between the delivery rollers 11 and 12 and the doffer 5 is because the doffer 5 and the rollers 6; 7, 8; It was constant at all speeds.

FIG. 17 shows another solution for the draft adjustment between the doffer 5 and the stripping roller 6. A pair of delivery rollers 11, 12 instead of one independent electric motor
And the doffer 5 are provided with a continuously variable transmission. In this case, the control is carried out by the microcomputer 26 via the adjusting means 37, for example a servomotor. The servomotor modifies the rotational speed of one of the shafts engaged with the transmission 34, thereby adapting the draft to the feed speed.

The motor controller 20, 24 has a dual function. A specific rotation speed, for example 100 rpm, is designated as a target value for the doffer 5 by the operation function. Depending on the adjusting function, the specified speed, for example 1
00 rpm is kept constant. The diameter of the doffer 5 is, for example, 700 mm, and the diameter of the delivery rollers 11, 12 is, for example, 150 mm.

Reference numeral 42 represents a signal generator. Signal generator 42
By means of this, for example, a signal 38 for adjusting the spinning start operation is input. 39 represents a means of storing the feed rate, eg for spinning start or for high production. 40
Represents means for designating the rotation speed corresponding to the supply speed to the motor controller 24. The signal generator 42 can be a measuring element for the amount of sliver filling the can 41. The signals 38a, 38b, 38c (see FIG. 6) are different signal generators (not shown) for ending the can replacement work and the like.
Can be formed by.

[Brief description of drawings]

FIG. 1 is a side view of a card having a device of the present invention.

FIG. 2 is a plan view of the card of FIG.

FIG. 3 is a trend curve of draft and feed rate.

FIG. 4 is a doffer velocity-draft trend curve.

FIG. 5 is the curve range between draft and feed rate.

FIG. 6 is a system configuration diagram of doffer rotation speed control.

FIG. 7 is a curve showing the relationship between the rotation speed of the doffer and the rotation speed of the delivery roller.

FIG. 8 is an embodiment of a system block diagram for controlling a doffer, stripping roller, delivery roller and nip roller.

FIG. 9 shows another embodiment.

FIG. 10 shows another embodiment.

FIG. 11 shows another embodiment.

FIG. 12 shows another embodiment.

FIG. 13 shows another embodiment.

FIG. 14 is a control method according to a known technique.

FIG. 15 is a plan view of a conceptual diagram of a card according to a known technique.

FIG. 16 shows the relationship between the corresponding draft and the feed rate.

FIG. 17 is a conceptual diagram of a roller drive system using a continuously variable transmission.

[Explanation of symbols]

 5 ... Doffer 6 ... Stripping roller 7, 8 ... Nip roller 11, 12 ... Delivery roller 19, 23, 28, 29, 30 ... Electric motor 20, 24 ... Electric motor controller 22 ... Draft adjusting means 25 ... Rotation speed meter 26 ... Electronic control -Adjustment unit 34 ... Transmission 35, 36 ... Calendar roller 37 ... Servo motor 39 ... Supply speed storage means 41 ... Can 42 ... Signal generator

Claims (16)

[Claims] 1. The rollers of the doffer section are driven by an electric motor having an electronic control and adjustment unit and setpoint adjustment means, the change of the feed rate being effected for example by a change of the number of revolutions of the electric motor relative to the doffer area, and further of the fibrous material. In a production control device for a card of textile fiber such as cotton or chemical fiber with adjustable draft, a roller (5, 6) in the doffer area (doffer, stripping roller) or roller pair (7, 8; 11, 12) ( The nip roller and delivery roller are electric motor adjusters (20, 2).
4) each having two or more independent electric motors (1
9 and 23), and the draft between the rollers (5, 6) or roller pairs (7, 8; 11, 12) that are independently driven can be changed correspondingly when the supply speed changes. An apparatus, characterized in that a draft adjusting means is provided. 2. The doffer (5) and stripping roller (6) can be driven by one electric motor (19), and the nip rollers (7, 8) and the delivery rollers (11, 12) can be driven by another electric motor (23). The device according to claim 1. 3. An electric motor (23) for driving the rollers (35, 36) for the Kenskoiler.
The device according to. 4. A tachometer (25) comprises a motor (19) for the doffer zone when the roller speed of a roller (5, 6) or roller pair (7, 8; 10, 11) changes. And / or another electric motor (28, 2
9) Electronic control / adjustment unit (2)
6) It is connected to a (microcomputer).
4. The device according to any one of 1 to 3. 5. The electronic control and adjustment unit (26) provides the measured number of revolutions of the roller (5, 6) or roller pair (7, 8; 10, 11) based on a tachometer (25),
Rollers in the doffer area (5,6,7,8,9,10,1
5. The device according to claim 1, further comprising storage means for storing the dependence of 1) on the number of revolutions to be adjusted. 6. Rollers (5, 6) or roller pairs (7,
8; 11,12; 35,36) for each motor (19,23,28,29,30) corresponding dependency curves are stored in said storage means.
6. The device according to any one of 1 to 5. 7. An electric signal for adjusting the rotational speed is sent from the electronic control and adjustment unit (26) to the respective motor (1).
9. 23, 28, 29, 30) delivered to a motor regulator (20) associated with the motor control (20).
The device according to paragraph. 8. The device according to claim 1, wherein the electrical signal for changing the rotational speed is the changed target rotational speed. 9. A device according to claim 1, wherein another electric motor drives the calender roller of the Kenskoyler. 10. A tachometer is a delivery roller (11,
12. A motor (23) for 12) is associated with the motor.
10. The device according to any one of 1 to 9. 11. The rollers in the doffer area are driven by an electric motor having an electronic motor adjuster with target value adjusting means, and the rollers in the doffer area are associated with a tachometer connected to the motor adjuster to provide a feed speed control. In the production control device for the card of textile fiber such as cotton, chemical fiber, etc., which can be adjusted by changing the rotation speed of the electric motor with respect to the doffer area, etc. The transmission (3) in which the roller pair (7, 8; 11, 12) is steplessly adjustable by the electric motor (19) having the electric motor adjuster (20).
4), a tachometer (25) associated with the electric motor (19) is connected to the draft adjusting means (22) and this draft adjusting means (22) is connected when the roller speed changes. Automatically change the draft between rollers (5, 6) or roller pairs (7, 8; 10, 11) driven independently of each other based on a tachometer (25) apparatus. 12. Device according to claim 11, wherein a servomotor (37) is associated with the transmission (34) for adjustment. 13. A roller in the doffer area is driven by an electric motor having an electronic control and adjustment unit and a target value adjusting means, and one roller in the doffer area is associated with a tachometer connected to the motor adjuster to provide a supply. 2. A change in speed is effected, for example, by a change in the speed of rotation of the motor in the doffer area, and further a specific draft can be adjusted.
13. The production control device for a card of textile fiber such as cotton and chemical fiber according to any one of 1 to 12, wherein the rollers (5, 6) (doffer, stripping roller) or roller pair (7, 8; 11, 12)
(Nip roller, delivery roller) can be driven by two or more independent electric motors (19, 23) having electric motor adjusters (20, 24), the electric motor (23)
A tachometer (25) associated with is connected to the draft adjusting means (22), and this draft adjusting means (22) is automatically based on the tachometer (25) when the roller speed changes. Independently driven rollers (5,
6) or a device characterized by changing the draft between roller pairs (7, 8; 11, 12). 14. A signal generator (42) for varying the feed rate.
The device according to any one of claims 1 to 13, which is performed corresponding to. 15. The device according to claim 1, wherein the signal generator (42) is associated with a means (39) for storing the feed rate. 16. The signal generator (42) comprises a can (41).
The device according to any one of claims 1 to 15, wherein the device is a filling amount measuring element.