JPH038890A - Method for determining exchange timing of elastic roll of supercalender - Google Patents

Abstract

PURPOSE:To determine the optimum exchange timing of an elastic roll by detecting surface roughness, etc., of an elastic roll, using the critical detection signal to being the deterioration of the luster and smoothness of the product as a preset value and comparing the subsequent detection signals with the preset value. CONSTITUTION:At least one factor selected from the surface roughness and vibration of elastic rolls 5, 5', noise of a supercalender and luster and smoothness of the product is detected and the detection signal is inputted to an analyzing apparatus 13. The detection signal is compared with a preset value stored in the analyzing apparatus in advance. The exchanging timing of the roll is determined by the analyzing apparatus and displayed on a display 20.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for diagnosing elastic roll replacement timing for a supercalender.

[Prior art] A super calendar in a finishing machine is equipped with a large number of metal rolls and elastic rolls that rotate at high speed, and by passing the product (paper) between these rolls, it improves the smoothness and gloss of the product. I try to let them do it.

The elastic roll of the above-mentioned super calendar is compression-molded from paper, cotton, etc., and its outer surface is polished.The elastic roll is subject to heavy wear and becomes polygonal when used, causing vibrations. There are problems in that it causes noise and has a negative impact on the quality of the paper.

For this reason, conventionally, in order to polish the elastic roll,
I try to replace it regularly every 7 to 10 days.

[Problems to be Solved by the Invention] However, in the above conventional method, the replacement period of the elastic roll is simply determined based on experience, such as every few days. Work may continue without replacement, resulting in a deterioration in quality, or replacement may occur when there is no need to replace, resulting in more frequent line stoppages and reduced productivity. I have a problem (2).

The present invention aims at diagnosing the appropriate time to replace an elastic roll, thereby enabling the most efficient operation of the elastic roll.

[Means for Solving the Problems] The present invention detects at least one of the vibration of an elastic roll, the surface roughness of an elastic roll, the noise of a super calendar, and the glossiness and smoothness of a product, and the detection signal detects the Calculate the value at which at least one of the glossiness or smoothness is at the limit value for deterioration and input it into the diagnostic device as a set value,
This invention relates to a method for diagnosing when to replace an elastic roll of a super calendar, characterized in that the detected signal is then compared with the set value to diagnose when to replace the roll, and the time to replace the roll is displayed on a display device. be.

[Effects] Vibration of the elastic roll, surface roughness of the elastic roll, noise of the supercalender, and at least one of the gloss and smoothness of the product.
When one of the rolls is detected and the detection signal is input to the diagnostic device, the detection signal is compared with the setting value input in advance to the diagnostic device to diagnose the roll replacement time, and the roll replacement time is displayed on the display device. Is displayed.

[Implementation example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of an apparatus for carrying out the method of the present invention, in which a frame 1 of a supercalender is provided with a top crown control roll 2 at the upper end and a bottom crown control roll 3 at the lower end. Metal rolls 4 and elastic rolls 5 are arranged substantially alternately between both control rolls 2.3, and a product (paper) 6 is passed in a zigzag pattern between these rolls. Moreover, each of the rolls 2, 3.4
．． 5 is supported via a bearing 7 to be movable in the vertical direction with respect to the frame support.

Further, a roll storage post 9 is provided at the front position of the roll installation side of the frame 1 on which a plurality of spare elastic rolls 8 for replacement are placed.

Each roll provided in the super calender 2゜3.4.
5 is installed so that it can be moved in the vertical direction, so 1. The bottom elastic roll 5° is operated under the harshest conditions and is most susceptible to wear and deformation.

For this purpose, a vibration detector IO for detecting vertical vibration of the bottom elastic roll 5° is installed on the bearing 7 of the bottom elastic roll 5°. The vibration acceleration detection signal 12 obtained through the diagnosing device 13 is inputted to the diagnostic device 13.

On the other hand, a noise detector 14 for detecting the noise of the super calendar is installed at a position close to 5° of the bottom elastic roll, and a noise detection signal 15 detected by the noise detector 14 and obtained via the frequency analyzer 11 is provided. is input into the diagnostic device 13.

Further, a roll surface detector 17 is installed near the bottom elastic roll 5' to detect the surface condition of the bottom elastic roll 5' while moving in the axial direction of the bottom elastic roll 5' along the rail 1G. The detection signal from the roll surface detector 17 is input to the image processing device 18 and the elastic roll 5
The roll surface roughness detection signal 19 is input to the diagnostic device 13.

In addition, a gloss meter 21 is installed at the super calendar exit position of product 6.
and a smoothness meter 22.

The level of the vibration acceleration detection signal 12 from the vibration detector 10, the level of the noise detection signal 15 from the noise detector 14, and the roll surface detected by the roll surface detector 17 and obtained via the image processing device 18. When we compared the changes over time in the level of the roughness detection signal 19 and the changes over time in the glossiness S of the product 6 from the gloss meter 21, we found that they were very closely related, as shown in FIG. It turned out that it was.

Moreover, this relationship was exactly the same for the glossiness of Product 6. The glossiness and smoothness of the product can be detected by conventional optical detection methods.

Therefore, the limit value of the deterioration of the glossiness S or smoothness of the product is determined, and the vibration acceleration detection signal 1 when the limit value is reached.
2 set vibration value 12°, noise detection signal 15 set noise value 15°, roll surface roughness detection signal 19 set roughness value 19
By determining the respective degrees and inputting them into the diagnostic device 13 in advance, the vibration acceleration detection signal 12, the noise detection signal 15, and the roll surface roughness detection signal 19 that are actually detected are obtained.
From this, it is possible to diagnose the roll replacement time X.

The diagnostic results obtained by the diagnostic device 13 are displayed on a display device 20 such as a display, printout, or alarm generator.

Next, the operation of the above embodiment will be explained.

While the super calendar is in operation, a vibration acceleration detection signal 12 is obtained by detecting with the vibration detector 10 and passing through the frequency analyzer 11, and detecting with the noise detector 14 and passing through the frequency analyzer 11. Noise detection signal 1
5 is obtained, the roll surface tI degree detection signal 19 is obtained by detecting with the roll surface detection 3117 and passing through the image processing device 18, and the glossiness S of the product is checked to determine that the glossiness S is within the limit value. The respective detection signals 12, 15.1 when
9 is determined and input into the diagnostic device N13 as set values 12°, 15', and 19°.

Thereafter, vibration acceleration, noise, and roll surface roughness are detected in the same manner as above, and the detection signals 12, 15, and 19 are sent to the diagnostic device 1.
Enter 3.

When the elastic roll 5.5 gradually wears out and deforms due to the operation of the super calendar, each of the detection signals 12.15
．． 19 gradually rises, and the detection signals 12, 15
．． When the level of roll 19 reaches the set value 12°, 15°, 19, the diagnostic device 13 diagnoses the need for roll replacement and displays this on the display device 2o.

Further, the diagnostic device 13 receives each of the detection signals 1215.1.
It is also possible to predict and display the roll replacement time X based on the increase in the level of 9.

Furthermore, the diagnostic device 13 detects the detection signals 12, 15, 19
Even if it is determined that the roll needs to be replaced when any one of the setting signals reaches 12', 15°, or 19°,
Alternatively, the need for roll replacement may be determined when two or three detection signals reach a set signal.

Also, regarding the smoothness obtained from the smoothness meter 22, it is possible to diagnose the roll replacement time in exactly the same manner as described above.

It should be noted that the method for diagnosing elastic roll replacement timing for a supercalender according to the present invention is not limited to the above-mentioned embodiments.
It is possible to have one or more vibration detectors, noise detectors, and roll surface detectors; one or more gloss meters and smoothness meters; Of course, it is possible to install more than one, and various changes can be made without departing from the gist of the invention.

[Effects of the Invention] As explained above, according to the method for diagnosing the time to replace the elastic roll of a supercalender of the present invention, the time to replace the elastic roll can be automatically and accurately diagnosed and displayed, thereby making it easier to replace the elastic roll. By doing so at the appropriate time, the elastic rolls can be operated most effectively, resulting in excellent effects of improving productivity and reducing costs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of an apparatus for implementing the method of the present invention, and FIG. 2 is a diagram showing the relationship between the glossiness of a product and the level of a detection signal. ■ is the frame, 5.5° is the elastic roll, 6 is the product, 7 is the bearing, 10 is the vibration detector, it is the frequency analyzer, 12 is the vibration acceleration detection signal, 12° is the setting value, 13 is the diagnostic device, 14 is a noise detector, 15 is a noise detection signal, 15° is a set value, 17 is a roll surface detector, 18 is an image processing device,
19 is a roll surface roughness detection signal, 19 is a set value, 2o is a display device, 21 is a gloss meter, 22 is a smoothness meter, S is a product gloss level, and L is a limit value.

Claims (1)

[Claims] 1) Detect at least one of the vibration of the elastic roll, the surface roughness of the elastic roll, the noise of the super calendar, the glossiness and smoothness of the product, and the detection signal indicates that at least one of the glossiness or smoothness of the product is detected. The value at the time of the deterioration limit value is determined and inputted into the diagnostic device as a set value, and then the detected detection signal is compared with the set value to diagnose when it is time to replace the roll, and the time to replace the roll is displayed. A method for diagnosing elastic roll replacement timing for a super calendar, characterized by displaying the information on a device.