JPH0510477U - Continuous fiber group quantitative feeder - Google Patents

Abstract

(57) [Abstract] [Objective] [Constitution] A device for continuously measuring the unit weight of a continuous fiber group (for example, a sliver-like fiber group) (for example, a capacitance measuring device) and a rotation of a motor for the measured unit weight. The present invention relates to a continuous fiber group quantitative supply system including a control unit that changes into a signal that governs the number and a supply unit that uses a motor as a drive system that can change the number of rotations by an external signal. [Effect] The quantitative supply system according to the present invention is not affected by the fluctuation of the unit weight of the continuous fiber group to be supplied,
It is possible to make the amount of fiber supplied per unit time uniform, which is useful for improving quality, in particular, improving uniformity in spun yarn production, non-woven fabric production processes and the like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a continuous fiber group quantitative supply device, and particularly to a continuous fiber group which requires a uniform fiber amount in the longitudinal direction and / or the width direction, for example, a continuous fiber group which is a precursor in the production of spun yarn, nonwoven fabric, etc. Specifically, it relates to a device for supplying electricity.

[0002]

[Prior Art]

 Conventionally, in the production of spun yarns, nonwoven fabrics, and the like, attempts have been generally made to make the precursor sliver and the like uniform in order to make the fiber amount in the longitudinal direction and / or the width direction uniform. Examples include controlling the amount of supplied fiber groups by measuring the amount of discharged fibers in a card machine or a gilding machine, performing a kneading process, and repeating a card process.

However, as more uniform spun yarns and non-woven fabrics are demanded, and simplification of the process is demanded, it has become impossible to satisfy the demands only by the attempts so far. Further, depending on the type of fiber, for example, glass fiber, ceramic fiber, carbon fiber and the like, fiber damage in the process of processing into a sliver or the like is great, and it is extremely difficult to achieve uniformity by repeating the process.

[0004]

[Problems to be solved by the device]

 The object of the present invention is to eliminate the influence of fluctuations in the supply source such as a sliver, and to make the amount of fibers in the longitudinal direction and / or the width direction of a product manufactured in spun yarn, nonwoven fabric, etc. It is to provide a device for uniformly feeding a continuous fiber group such as a sliver.

[0005]

[Means for Solving the Problems]

 The above object of the present invention is to provide an apparatus for continuously measuring a unit weight of a continuous fiber group and a rotation speed of a motor for moving the continuous fiber group so that the measured unit weight becomes a set unit weight. A continuous fiber group constant quantity supply device characterized by having a control device for adjusting and a supply device for the continuous fiber group, the drive system of which is the motor whose rotation speed can be varied by a signal from the control device. It

The continuous fiber group referred to here may be any of continuous long fibers, sliver-shaped, cotton-shaped, mat-shaped, ribbon-shaped and the like, as long as the fibers can be continuously connected and supplied. As a method of continuously measuring the unit weight of the continuous fiber group, a mechanical method such as a measuring roller method, a method of measuring a change in air pressure due to a change in volume, or a resonance frequency with respect to a mass of a microwave wave is measured. There are methods and methods of measuring the change in capacitance due to change in mass. Of these, the method of measuring the change in capacitance is preferable to improve the measurement accuracy and prevent damage to the fiber due to contact with the measuring tool. It is more independent than the comparative measurement method using two DUTs. The measurement method is more preferable. Furthermore, in order to prevent the fiber group from being caught in the measuring tool, it is desirable that the openings through which the fiber group is supplied radiate and that the surface of the portion that may come into contact with the fiber group be smooth. In addition, the measurement unit must have a function of transmitting the measured unit weight of the continuous fiber group to the control unit as a digital or analog signal.

The control unit converts the signal transmitted from the measuring unit into a signal that controls the rotational speed of the motor for supplying the continuous fiber group based on the comparison with the set continuous fiber group supply amount, and supplies the signal. Any device can be used as long as it has a function of transmitting data to the department, and a control unit such as a microcomputer having an input / output function or a personal computer is possible. The signal output from the control unit may be digital or analog and is selected arbitrarily.

The supply unit may have a motor that can proportionally change the number of rotations in response to a signal from the control unit as a drive system and have a function of transferring a continuous fiber group. The transfer can be carried out by a nip system using a rotating roll or a conveyor system in which it is carried on a belt, but it is arbitrarily selected depending on the physical properties such as the shape of the continuous fiber group and the tensile strength. The present invention can be applied to any type of fiber such as natural fiber, regenerated fiber, synthetic fiber, and inorganic fiber as long as it is a continuous fiber group, but its effect is great when the unit weight of the continuous fiber group fluctuates greatly. It is particularly effective for glass fibers, ceramic fibers such as alumina fibers, and inorganic fibers such as carbon fibers.

[0009]

【Example】

 Hereinafter, a specific embodiment of the present invention will be described. FIG. 1 is an explanatory view showing an example of the device of the present invention. This device comprises a measuring tool 3 for continuously measuring the unit weight of the continuous fiber group or its equivalent amount, and a nip roll 2 for supplying the continuous fiber group 1 to a predetermined fiber processing device (not shown). , The measuring unit 9 for changing or amplifying the signal from the measuring tool is compared with the measuring signal of the measuring unit 9 and the setting signal, and the difference is variably reduced via the control pack 6. It is mainly composed of a control device 10 that outputs a control signal to a drive motor 7 of the fiber group supply device. In the figure, 4 is an input terminal of the control device 14, and 5 is an output terminal. As a measuring device (measuring tool 3 and measuring part 9), the fiber supply part of the thickness meter TM-660V of Kyoto Sekihin Seiko Co., Ltd. for measuring the electrostatic capacity of the fiber is enlarged so that the continuous fiber group can pass through. The PC-9801RX personal computer (manufactured by NEC Corporation) with the function of AD converting the signal from the measuring unit 9 and the function of DA conversion of transmitting the signal to the supplying device 8 was used as the control device. It was used and controlled by C language. The feeding device 8 is a nip system with two rolls 2 using a combination of an induction motor (2IK6RA-A) of Oriental Motor Co., Ltd. and a speed control pack (SS3 1MA-J) 6 as a drive system. A glass fiber sliver (4 g / m) was used as the continuous fiber group 1, the fiber group was quantitatively supplied by the continuous fiber group supply device of the present invention, and the result of the continuous supply amount control is shown in Table 1. Shown in. In addition, as a comparative example, the result when the measuring device (3, 5) and the control device 10 are not used is also shown.

[0010]

[Table 1] * 1 Continuous fiber group fluctuation rate: The weight of the continuous fiber group was measured every 5 cm, and the average weight and its standard deviation were calculated.

Fluctuation rate = standard deviation / average weight × 100 * 2 Supply rate fluctuation rate: The weight of the continuous fiber group was measured every 5 seconds, and the average weight and its standard deviation were calculated. Fluctuation rate = standard deviation / average weight × 100 As is clear from Table 1, when the quantitative feeding device of the present invention is used, the fluctuation of the fiber supply amount per unit time is significantly reduced, and particularly, the unit weight of the continuous fiber group. It can be seen that the improvement effect is large when the fluctuation of is large.

In the above examples, the means for measuring the unit weight of the continuous fiber group is shown by capacitance, but any means that can continuously measure the fiber weight may be used. Good.

[0013]

[Effect of the device]

 According to the quantitative supply device of the present invention, the fiber supply amount per unit time can be made uniform without being affected by the fluctuation of the unit weight of the continuous fiber group to be supplied, and the spun yarn to be manufactured. Useful for improving the uniformity of non-woven fabrics.

[Brief description of drawings]

FIG. 1 is an explanatory view of a continuous fiber group quantitative supply device showing an embodiment of the present invention.

[Explanation of symbols]

1 ... Continuous fiber group, 2 ... Nip roll, 3 ... Measuring tool, 4 ...
Input terminal, 5 ... Output terminal, 6 ... Control pack, 7
... motor, 9 ... measuring unit, 10 ... control device.

Claims (1)

[Claims for utility model registration] 1. A device for continuously measuring the unit weight of a continuous fiber group, and a device for moving the continuous fiber group so that the measured unit weight becomes a set unit weight. A continuous fiber group constant amount supply, comprising: a controller for adjusting the number of rotations of a motor; apparatus.