JP3208779B2 - Calendar bank amount detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting a bank amount of a calendar for forming a sheet or film of rubber or plastic using two or more multi-stage rolls.

[0002]

2. Description of the Related Art As shown in FIG. 4, a calendar for forming a sheet or film of rubber, plastic, or the like has a first roll 1, a second roll 2, a third roll 3, and a fourth roll 4 which are respectively arranged in parallel. The material 5 is placed between the first and second rolls 1 and 2 and the second and third
The sheet-like product 6 is formed by successively rolling by passing between the rolls 2 and 3 and between the third and fourth rolls 3 and 4 sequentially.

In the above-mentioned calendar, the first bank B1 formed between the first and second rolls 1 and 2, between the second and third rolls 2 and 3, and between the third and fourth rolls 3 and 4, respectively. It is necessary to pay attention to the bank amounts (reservation amounts of the material 5) of the second bank B2 and the third bank B3. That is, if the bank amount is too large (the bank is too thick), there is a possibility that a wound called air entrainment may occur, and the rotation of the bank may not be performed smoothly, and the kneading of the material 5 may be uneven, resulting in uneven quality. There are drawbacks that occur. On the other hand, if the bank amount is too small (the bank is thin), there is a possibility that problems such as cutting of the sheet-like product 6 and increase in thickness variation may occur.

For this reason, conventionally, a method has been adopted in which the amount of bank is detected by measuring the distance between the materials of the bank 5 as an object to be measured using a laser sensor. However, in the case of this method, the second bank B2, the third bank
In the bank B3, the first bank B1 is not used because the distance required for the measurement cannot be kept in relation to other surrounding equipment and the durability is uneasy due to use in a high temperature atmosphere.
Could only be used to detect

As a bank amount detection method which does not cause a problem as in the case of the above laser sensor method, an image of a bank is formed by a thermography device, and an area ratio of a portion corresponding to a material in the image is calculated to determine the bank amount. A method of detecting the image (Japanese Patent Application Laid-Open No. 63-21116), a process of photographing a screen before and after the bank is generated with a TV camera, and subtracting the screen before and after the process to binarize the image. There has recently been proposed a method of detecting the amount of bank (for example, Japanese Patent Publication No. 2-22881).

[0006]

However, in the above-mentioned recently proposed methods, although the measurement is very accurate, the first bank is expensive because the thermography device or the TV camera as a bank sensor is expensive. In addition, when trying to detect the bank amounts of all the banks, 3 to 6 units are required only for the bank sensor, which is very expensive overall. Further, in order to detect the bank amount, a specialized technique such as an image processing technique is required.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a calendar bank amount detecting device capable of detecting a bank amount at low cost without requiring specialized techniques.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a calendar for forming a sheet or film while forming a plurality of banks by using a multi-stage roll. A first infrared thermometer arranged toward the boundary between the surface and the bank; and a second infrared thermometer arranged toward the surface of the material, further comprising: a measurement signal of the first infrared thermometer; The measurement signal of the second infrared thermometer as a temperature correction signal is input to the measurement signal, and based on the change in the area ratio of the surface of the roll to the material at the bank boundary which is the field of view of the first infrared thermometer. And a bank amount calculator for calculating the bank amount.

A first infrared temperature disposed toward a boundary between the roll surface and the bank corresponding to the bank in a calendar for forming a sheet or a film while forming a plurality of banks using a multi-stage roll. A thermometer, a second infrared thermometer arranged toward the surface of the material, and a third infrared thermometer arranged toward the roll surface, respectively.
Further, a measurement signal of the first infrared thermometer, a measurement signal of the second infrared thermometer and a measurement signal of the third infrared thermometer, which are temperature correction signals for the measurement signal, are inputted and the first infrared thermometer is inputted. A configuration is provided in which a bank amount calculator is provided for calculating the bank amount based on a change in the area ratio between the surface of the roll and the material at the bank boundary, which is the visual field of the thermometer.

Further, a first infrared temperature arranged toward a boundary between the roll surface and the bank, corresponding to the bank in a calendar for forming a sheet or a film while forming a plurality of banks using a multi-stage roll. A thermometer, and a third infrared thermometer arranged toward the roll surface. Further, the measurement signal of the first infrared thermometer, and the third infrared thermometer serving as a temperature correction signal for the measurement signal And a bank amount calculator for calculating the bank amount based on the change in the area ratio between the surface of the roll and the material at the bank boundary which is the field of view of the first infrared thermometer.

[0011]

[0012]

When the bank amount changes, the area ratio of the surface of the roll to the material in the field of view of the first infrared thermometer arranged toward the bank boundary changes, and the ratio is radiated toward the first infrared thermometer. The amount of infrared energy that changes. For this reason, the measurement signal of the first infrared thermometer is calculated by the bank amount calculator, and the change of the temperature of the material or the roll surface is measured by the second amount.
At least one of the measurement signal of the infrared thermometer and the measurement signal of the third infrared thermometer is input to the bank amount calculator as a temperature correction signal and corrected to obtain the bank amount.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In a calendar having the same structure as that shown in FIG.
A first bank B1 formed between the second rolls 1 and 2, and a second bank B2 formed between the second and third rolls 2 and 3
And a third bank B3 formed between the third and fourth rolls 3 and 4, respectively.
An infrared thermometer 7A and a second infrared thermometer 7B are provided, and each first infrared thermometer 7A is connected to a bank B1, B
2, B3 and the second infrared thermometer 7B disposed toward the boundary between the surfaces of the rolls 2, 3, and 4 downstream thereof, and each of the second infrared thermometers 7B is located on the surface of the material 5 located upstream of the banks B1, B2, and B3. , So that the first infrared thermometer 7A can measure the infrared energy radiated from the bank boundary and the second infrared thermometer 7B can measure the infrared energy radiated from the material 5. Further, a temperature correction circuit 9 is incorporated in the signal line 8 of the second infrared thermometer 7B, and a signal from the second infrared thermometer 7B sent through the temperature correction circuit 9 and the first infrared thermometer 7A
And a bank amount calculator 10 for calculating a bank amount (bank height or bank width) based on a signal from the bank amount calculator 10 and a bank amount signal obtained by the bank amount calculator 10 and a bank amount setter 11. And a bank change amount calculator 12 for calculating the bank change amount by calculating the set signal from the bank.

Since the infrared thermometer can measure the temperature of the object by measuring the amount of infrared energy radiated from the object, the first infrared thermometer 7A uses the infrared thermometer 7A from the bank boundary. By measuring the emitted infrared energy, the temperature of that portion can be determined. FIG. 2 shows the second infrared thermometer 7A.
This figure shows the field of view of the bank boundary in the bank B2. For example, if the amount of bank changes, the area ratio between the surface of the roll 3 and the material 5 changes, so that the amount of emitted infrared energy also changes. become. Therefore, the first
The value measured by the infrared thermometer 7A is the bank amount calculator 1
The bank amount is detected by inputting it to 0 and performing an operation. However, at this time, if the temperature of the material 5 sent from the first bank B1 changes, the radiation amount of the infrared energy changes.
By measuring the temperature of the material 5 with the second infrared thermometer 7B and inputting it as a temperature correction signal to the bank amount calculator 10 through the temperature correction circuit 9, the bank amount can be accurately obtained from the input difference. . Further, the bank change amount is obtained by inputting the obtained bank amount signal and the setting signal from the bank amount setter 11 into the bank change amount calculator 12 and calculating them.

The infrared thermometer used in the present invention may be a commercially available infrared thermometer, and it is possible to detect the bank amount simply by combining two infrared thermometers and subtracting the signal thereof. It becomes something.

FIG. 3 shows another embodiment of the present invention. In a configuration similar to that shown in FIG. 1, rolls 2 and 3 correspond to banks B1, B2 and B3, respectively.
A third infrared thermometer 7C disposed toward the surfaces of the third and fourth thermometers, and a roll surface temperature signal measured by the third infrared thermometer 7C as a temperature correction signal;
The temperature correction circuit 9 'is incorporated in the signal line 13 of the third infrared thermometer 7C so that the temperature is corrected.

In the case of the embodiment shown in FIG. 3, even if the temperature of the roll surface changes, the temperature of the roll surface measured by the third infrared thermometer 7C is used as a temperature correction signal as a bank amount calculator 1
Since the input is made to be 0, the bank amount can be detected more accurately than in the embodiment of FIG.

In the above embodiment, the combination of the first and second infrared thermometers 7A and 7B and the combination of the first, second and third infrared thermometers 7A, 7B and 7C are shown.
The first and third infrared thermometers 7A and 7C may be combined, and the combination of the infrared thermometers is desirably arranged at three locations, that is, the central portion in the longitudinal direction and the left and right portions of the bank. Of course, the number of arrangements can be arbitrarily selected, and various changes can be made without departing from the scope of the present invention.

[0020]

As described above, according to the calendar bank amount detecting apparatus of the present invention, a plurality of banks are formed using a multi-stage roll while forming a sheet or a film while corresponding to the above-mentioned banks in a calendar. , A first infrared thermometer arranged toward the boundary between the roll surface and the bank, and a second infrared thermometer arranged toward the surface of the material, further comprising a measurement signal of the first infrared thermometer. And a change in the area ratio between the surface of the roll and the material at the bank boundary which is a field of view of the first infrared thermometer and receives a measurement signal of the second infrared thermometer as a temperature correction signal for the measurement signal. , A configuration provided with a bank amount calculator for obtaining a bank amount based on the above, a configuration provided with a third infrared thermometer arranged toward the roll surface, or Since the third infrared thermometer is used in place of the second infrared thermometer, when the bank amount changes, the surface of the roll in the field of view of the first infrared thermometer arranged toward the bank boundary portion is changed. Since the area ratio of the material changes and can be detected as a change in the amount of infrared energy radiated toward the first infrared thermometer, the temperature of the material measured by the second infrared thermometer, and A special technique such as image processing is required by utilizing a change in infrared energy detected by the first infrared thermometer which has been temperature-corrected by at least one of the roll surface temperatures measured by the third infrared thermometer. And the bank amount can be accurately detected, and a commercially available product can be used for the infrared thermometer. Made, it exhibits an excellent effect and the like.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of a calendar bank amount detecting device according to the present invention.

FIG. 2 is a schematic diagram showing a field of view by a first infrared thermometer.

FIG. 3 is a schematic diagram showing another embodiment of the present invention.

FIG. 4 is a schematic diagram showing an example of a calendar.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st roll 2 2nd roll 3 3rd roll 4 4th roll 5 Material 6 Sheet-shaped product 7A 1st infrared thermometer 7B 2nd infrared thermometer 7C 3rd infrared thermometer 8 Signal line 9, 9 'Temperature correction circuit Reference Signs List 10 bank amount calculator 11 bank amount setting device 12 bank change amount calculator B1 first bank B2 second bank B3 third bank

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-161315 (JP, A) JP-A-3-72205 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B29C 43/00-43/58 G01B 11/28

Claims (3)

(57) [Claims] 1. A first infrared temperature arranged toward a boundary between a roll surface and a bank, corresponding to the bank in a calendar for forming a sheet or a film while forming a plurality of banks using a multi-stage roll. A thermometer, and a second infrared thermometer arranged toward the surface of the material, further comprising a measurement signal of the first infrared thermometer, and the second infrared thermometer serving as a temperature correction signal for the measurement signal. A bank amount calculator for inputting a measurement signal of the meter and calculating a bank amount based on a change in an area ratio between a roll surface and a material at a bank boundary portion serving as a field of view of the first infrared thermometer; A bank amount detecting device for a calendar. 2. A first infrared temperature disposed toward a boundary between a roll surface and a bank, corresponding to the bank in a calendar for forming a sheet or a film while forming a plurality of banks using a multi-stage roll. A thermometer, a second infrared thermometer arranged toward the surface of the material, and a third infrared thermometer arranged toward the roll surface, and further, a measurement signal of the first infrared thermometer, The surface and material of the roll at the bank boundary, which receives the measurement signal of the second infrared thermometer and the measurement signal of the third infrared thermometer as a temperature correction signal for the signal and serves as a visual field of the first infrared thermometer A bank amount calculator for obtaining a bank amount based on a change in the area ratio of the calendar. 3. A first infrared temperature arranged toward a boundary between a roll surface and a bank, corresponding to the bank in a calendar for forming a sheet or a film while forming a plurality of banks using a multi-stage roll. A thermometer, and a third infrared thermometer arranged toward the roll surface. Further, the measurement signal of the first infrared thermometer, and the third infrared thermometer serving as a temperature correction signal for the measurement signal And a bank amount calculator for inputting the measurement signal and calculating the bank amount based on the change in the area ratio between the surface of the roll and the area of the material at the bank boundary which is the field of view of the first infrared thermometer. Characteristic calendar bank amount detection device.