JPS62190518A - Speed controller - Google Patents

Abstract

PURPOSE:To control the difference of speed variation between rolls to an allowable value or smaller by comparing the difference between the speed variation of a reference roll and that of a following-up roll with an allowable speed variation difference value. CONSTITUTION:If speed variations of a reference roll 2 and a following-up roll 1 which are nipped are different from each other by disturbance or the like, output signals 11a and 12a of rotative speed detectors attached to these rolls are made different from each other, and the difference between the speed variation of the reference roll and that of the following-up roll which is obtained by the characteristic of a comparison operating circuit 13 is outputted as a speed variation difference 13a. This output value is compared with a set value 14a which is set by a setting circuit 14 and is allowed on the characteristic of a nip roll device. If the difference 13a is larger than the set value 14a, a deviation 15a is outputted from an output generating circuit 15 as the speed correcting signal of the following-up roll 1 to correct the speed of the following-up roll 1, and the difference 13a is reduced, thereby controlling always the difference to the allowable value or smaller.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a speed control device for a nip roll device that forms kneaded resin into a sheet.

(Conventional technology) In the conventional technology, the difference in speed change between each roll is not detected and controlled, so even if the difference in speed change between the rolls that are pinched due to disturbance etc. becomes large, the difference in speed change between each roll is not detected and controlled. The problem is that speed correction is not possible and the difference in speed change between rolls exceeds the allowable value due to the characteristics of the nip roll device, causing the resin to break, causing the nipped rolls to come into contact with each other, causing friction and damage to the rolls. was there.

(Problems to be Solved by the Invention) An object of the present invention is to provide a speed control device that can eliminate roll damage due to resin breakage between the rolls caused by a large difference in speed change between the nipped rolls. It is to be.

[Structure of the invention]

(Means for solving the problem) The present invention is attached to each roll to detect the speed of the roll,
A rotation speed detector generates an output corresponding to the speed, and a rotation speed detector receives the output signal of the rotation speed detector to determine the amount of speed change of each roll, compares the amount of speed change of each roll, and calculates the difference in speed change between rolls. A comparison calculation circuit that outputs and a setting circuit that sets the difference in speed change between rolls that is allowable due to the characteristics of the nip roll device, compares the output of the comparison calculation circuit and the setting value of the setting circuit, and performs a comparison calculation from the value of the setting circuit. Equipped with an output generation circuit that outputs the amount of deviation as a speed correction signal for the following roll when the output of the circuit is larger, and follows so that the difference in speed change between rolls does not always exceed the allowable value of the nip roll device. This is a speed control device characterized by correcting the speed of the roll.

(Function) In a device configured in this way, if there is a difference in speed change between the nipped reference roll and the following roll due to disturbance, etc., the output signal of the rotational speed detector attached to each roll will differ. occurs, and the difference between the speed change amount dv1/dt of the reference roll and the speed change amount dv, /dt of the follower roll determined from the characteristics of the comparison calculation circuit (dv, /dt - dv2/dt
) is output, and this output value is compared with the allowable speed change difference value due to the characteristics of the nip roll device set by the setting circuit, and if the input from the comparator is greater than the set allowable value, The output generation circuit outputs the amount of deviation as a speed correction signal for the following roll, corrects the speed of the following roll, and alleviates the difference in speed change between the rolls, thereby reducing the difference in speed change between the reference roll and the nip roll. Always control within the tolerance of the nip roll device.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

1 is a follower roll, 2 is a reference roll, 3 is a kneaded resin,
4 is a sheet formed by rolling the kneaded resin 3 between the follower roll 1 and the reference roll 2, 5 is the follower roll drive motor, 6 is the follower roll control device, 7 is the reference roll drive motor, and 8 is the reference roll. A control device, 9 a roll device speed regulator, 10 a follower roll speed difference adjuster, 11 a follower roll rotational speed detector attached to the follower roll 1, 12 a reference roll rotational speed detector attached to the reference roll 2, 13 is a comparison calculation circuit which receives the output signals 11a and 12a from the follow-up roll rotation speed detector 11 and the reference roll rotation speed detector 12 and outputs the speed change difference 13a between the rolls; A setting circuit 15 sets a set value 14a of the speed change difference between the rolls; 15 compares the speed change difference 13a output from the comparison calculation circuit 13 with the set value 14a of the setting circuit 14, and determines the setting of the setting circuit 14; value 1
This is an output generation circuit that outputs the deviation amount when the speed change amount difference 13a output from the comparison calculation circuit 13 is larger than 4a.

With the above configuration, when a difference occurs in the speed change amount of the nipped reference roll 2 and follower roll 1 due to disturbance etc., the output signal 11a of the rotational speed detector attached to each roll,
12a, and the difference (dv1/dt-dv
, /dt) is output as a speed change amount difference 13a, and this output value is compared with a set value 14a set by a setting circuit 14 and allowed based on the characteristics of the nip roll device.

If the speed change amount difference 13a from the comparison calculation circuit 13 is larger than the set value 14a, the output generation circuit 15
Then, the deviation amount 15 is used as the speed correction signal of the following roll 1.
a is output, the speed of the follower roll 1 is corrected, and the speed change difference 13a between the rolls is alleviated, so that the speed change difference between the reference roll 2 and the nip roll 16 is always within the allowable value of the nip roll device. This means that it can be controlled.

Through these operations, the difference in speed between the rolls of the nip roll device can always be controlled within the allowable value based on the characteristics, and prevents resin breakage between the rolls caused by the difference in speed change between the rolls exceeding the allowable value based on the characteristics. It becomes possible to eliminate roll damage.

〔Effect of the invention〕

As detailed above, according to the present invention, the difference in speed change between the rolls of the nip roll device can always be controlled within the permissible value based on the characteristics, and the difference in speed change between the rolls can be kept within the permissible value based on the characteristics. It is possible to eliminate damage to the rolls due to resin breakage between the rolls caused by exceeding the above range.

[Brief explanation of drawings]

The drawing is a configuration diagram of a speed control device showing an embodiment of the present invention. 1...Following roll 2...Reference roll 5.
... Follow roll drive motor 6 ... Follow roll control device 7 ... Reference roll drive motor 8 ... Reference roll control device 9 ... Roll device speed regulator 10 ... Follow roll speed difference adjuster 11 ...Following roll rotation speed detector 12...Reference roll rotation speed detector 13...Comparison calculation circuit 14...Setting circuit 1
5... Output generation circuit agent Patent attorney Noriyuki Chika

Claims (1)

[Claims] a reference roll rotation speed detector attached to the reference roll to detect the rotation speed; a follower roll rotation speed detector attached to the follower roll to detect the rotation speed; an output signal of the follower roll rotation speed detector; A comparison calculation circuit receives the output signal of the reference roll rotational speed detector, calculates the speed change amount of each roll, compares the speed change amount of each roll, and outputs the speed change amount difference between each roll, and the nip roll device. A setting circuit that sets the difference in speed change between rolls that is permissible due to the characteristics, and the setting value of this setting circuit and the output signal of the comparison calculation circuit are compared, and the output of the comparison calculation circuit is determined based on the setting value of the setting circuit. and an output generation circuit that outputs the amount of deviation as a speed correction signal for the following roll when the signal is larger, so that the difference in speed change between each roll does not always exceed the allowable value of the nip roll device. A speed control device that corrects the speed of the following roll.