JPS5920626A - Controlling method of volume of calender bank - Google Patents

Abstract

PURPOSE:To control each bank volume so that it is kept equal and to improve the quality and yield of a product by detecting the bank volume in the direction of calendering roll shafts and adjusting the speed at which a feed conveyor that supplies material to the bank passes over the bank. CONSTITUTION:A feed conveyor 8 is oscillated and scanned between an operator side end barrier 6 and a driver side end barrier 7 in a material reservoir 5 and supplies material from a conveyor head to the material reservoir 5. Concurrently, bank volumes are detected by each bank sensor 22 at several points in the direction of roll shafts 1-4. An oscillating speed of the conveyor 8 is operated on the basis of a detected value to adjust the amount of supply of the material and to equalize each amount of material in the material reservoir 5 in the direction of the roll shafts 1-4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control method for making the amount of calender banks, that is, the amount of raw material accumulated between calender rolls, uniform in the axial direction of the rolls during calender forming.

In calender forming, the amount of bank between calender rolls (
It is important to maintain a constant amount of accumulated raw material in order to improve product precision. However, in the past, the bank amount was visually checked and the raw material supply device such as a mixing mill was adjusted from time to time to adjust the amount of raw material supplied to the calender, making it impossible to control the bank amount at a constant level in the roll axis direction.
The thickness of the product rolled into a sheet by calender rolls may be uneven in the sheet width direction (roll axis direction), or the thickness of the product in the longitudinal direction may be unstable, resulting in a decrease in yield. I had this problem.

In view of these circumstances, the present invention detects the bank amount in the axial direction of the calender roll, and based on the detected value, determines the passing speed over the puncture of a feed conveyor that reciprocates in the axial direction of the calender roll and supplies raw materials to the puncture. This adjustment is made to uniformly control the bank amount in the roll axis direction.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 to 3, 1 and 2 are upper calender rolls forming a calender raw material bank 5, 3 is an intermediate calender roll, 4 is a lower 1ull calender roll, 6
is an example of operation of the raw material slant part 5, 7 is the drive n end part weir, 8
The operation side end layer 6 and the driving side end layer 7 of the raw material slanting section 5 are used as folding points, and the raw material is swung between them.
9 is the feed conveyor 8
The tail pulley 10 is the helad pulley of the feed conveyor 8, 11 is the conveyor belt passed between both pulleys 9 and 1o, and 12 is the tail pulley 9 via the transmission WJ13.
a drive motor 14 that applies rotational force to move the belt 11;
15 and 16 are guide pulleys provided at both ends of the fixed frame 14, and 17 is a guide pulley with both ends connected to the conveyor 8 side. 15°16
19 is a variable type swinging motor connected to the driving pulley 18, and 20° 21 is activated when the conveyor 8 reaches the turning point. In order to detect the amount of raw material in the raw material diagonal portion 5, a plurality of banks 22 (in the figure, 5 (J locations)) are installed at predetermined intervals in the roll axis direction above the raw material diagonal portion 5. It is a sensor.

In such a configuration, when feeding the raw material to the raw material diagonal section 5, the feed conveyor 8 is oscillated to move the raw material diagonal section 5 between the operation 11II end weir 6 and the driving side end layer 7. The raw material is supplied from the conveyor head section to the raw material oblique section 5 while being scanned by the conveyor head section. At the same time, each bank sensor 22 detects the bank amount at multiple locations in the roll axis direction, calculates the swing speed of the conveyor 8 based on the detected value, adjusts the amount of raw material supplied, and Make the amount of raw materials uniform in the roll axis direction.

That is, when the bank amount detected by each bank sensor 22 has a distribution as shown in FIG. The oscillation speed, that is, the speed at which the material passes over the diagonal portion 5 of the conveyor head section, is slowed down, while in areas C where the material exceeds the specified amount A, the amount of bank is made uniform by increasing the passing speed of the conveyor head section. control.

It should be noted that the present invention is not limited to the above-mentioned embodiments; for example, as a sensor for detecting the bank amount, a method that directly measures the bank height using a known capacitance type sensor, or a method that directly measures the bank height using a known capacitance type sensor, etc. A method of optically detecting the width of the raw material accumulated on the roll of the feed conveyor may be adopted, and a parallel movement type may be used as the feed conveyor in addition to an oscillating type, which deviates from the gist of the invention. It goes without saying that various changes can be made within the scope.

As explained above, according to the present invention, the amount of bank between the calender rolls can be made uniform in the roll axis direction, so it is possible to achieve the excellent effect of improving product quality and yield.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a view from the ■ - arrow direction of Fig. 1, Fig. 3 is a perspective view, and Fig. 4 [A] shows the distribution state of the bank amount. Figure 4 (B) is Figure 4 (B)
FIG. 3 is a diagram showing the relationship between conveyor movement amount and time when adjusting the supply amount of raw materials based on the distribution of the amount of raw materials. 1-4...Calender roll, 5...Slanted part of raw material, 8
...Feed conveyor, 22...Bank sensor. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1) In the process of supplying raw materials to the raw material pool from a feed conveyor that reciprocates between the turning point at a predetermined position in the roll axis direction of the raw material pool formed between calender rolls, the bank amount of the raw material pool in the roll axis direction 1. A method for controlling the amount of calendar bank, characterized in that the amount of bank in the axial direction is controlled to be constant by detecting a change in the conveyor and adjusting the moving speed of the conveyor based on the detected value.