JP3335489B2 - Calendar bank control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a calendar bank control device.

[0002]

2. Description of the Related Art A calender is used to laminate a plurality of types of materials into a sheet. In this calendering apparatus, a material such as rubber is formed into a sheet by a feed mill and supplied to a raw material pool (hereinafter, referred to as a "bank portion") formed between calender rolls, and the stored material in the bank portion is calendered. A predetermined laminated product is obtained by polymerizing with another material passing between the rolls.

In this type of calendering apparatus, it is said that maintaining a small amount of material in the bank portion (hereinafter referred to as "bank amount") is preferable for maintaining the quality stability of the product. If the amount is too small, a roll kiss or the like may occur. Then, the present inventor disclosed in Japanese Patent Application Laid-Open No.
No. 75 has developed a calendar bank control device and has achieved good results in keeping the bank volume constant.

[0004]

However, the technique described in the above-mentioned prior application controls the width of a knife provided at the cut-out portion of the feed mill conveyor and controls the speed of the feed mill conveyor in parallel with this. It was that. Therefore, equipment using a DC motor as the drive unit of the feed mill conveyor (such as a line in which a steel cord is buried during material polymerization) can be used, but equipment using an AC motor as the drive unit of the feed mill conveyor (material Such as lines where textile cords are embedded during polymerization).

[0005] Because of the characteristics of the AC motor, it is difficult to control the speed of the AC motor and the response is inferior, and there is a possibility that a defect such as a roll kiss may occur between the detection of the abnormality of the bank amount and the achievement of the control. Because. In addition, products with embedded textile cords have a longer main prep cord length, a significantly larger number of prep, more types of polymerized material, and a greater top width (rubber than products with embedded steel cords). There are structural differences such as wide film width and thin gauge (thickness), which has caused the most important problem in bank control, that is, the difficulty of measuring the bank amount. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is directed to a line in which a textile cord is buried during material polymerization, regardless of whether the AC mill is used for a drive unit of a feed mill conveyor. In any case, it is an object of the present invention to provide a calendar bank control device capable of suitably controlling a bank amount without being influenced by the above, so that a high quality product can be stably obtained. .

[0007]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, in the present invention, a supply means for cutting out a material kneaded by a feed mill with a knife and supplying it to a bank part of a calendar, a measuring means for measuring a bank amount of the bank part of the calendar, and a control cycle of the measuring means Based on each measurement result,
A calendar bank control device comprising: a control unit for controlling the bank amount to an appropriate value; wherein the measuring unit includes a plurality of sensors provided along an axial direction of the calender roll; Means are
Averaging is performed on the basis of the measurement data measured by each sensor of the measuring means to determine the bank amount, and after repeating the averaging process over time, a predetermined number of past bank amounts are calculated from the latest bank amount. Averaging means for calculating an average bank amount from them retroactively, and discriminating means for determining whether the average bank amount obtained by the averaging means is “large”, “small”, or “appropriate” And a correction means for multiplying the reference knife width by a predetermined knife width control coefficient when the discrimination means judges "large" or "small".

When the determining means determines that the amount is “appropriate”, the control means goes back a predetermined number of past average bank quantities from the latest average bank quantity, and determines the average bank quantity with time. A tendency detecting means for taking as a correlation coefficient an increase / decrease tendency of the average bank amount by performing a first-order regression on the relationship; And a converging means for multiplying by

Further, the control means, when the tendency detecting means determines "no tendency", Fn = KWn-1..kappa. / CSn-1.SPW where KW: knife width CS: calendar speed SPW: Spec Unit Weight κ: Coefficient Subscript n finds a factor Fn defined as meaning the n-th control cycle for each control cycle.
It is possible to provide a configuration including arithmetic means for controlling the knife width so that the factor Fn becomes a constant value .

[0010]

According to the present invention, the measuring means is provided with a plurality of sensors provided along the axial direction of the calender roll, and averaging is performed based on data measured by each of these sensors. The means performs the averaging process, and further repeats this process a predetermined number of times over time to calculate the average bank amount from the obtained plurality of bank amounts. It is possible to accurately grasp the bank amount and the tendency of its transition. Therefore, it is possible to cope with structural differences such as those described above.

In addition, the control means controls the correction means to control only the knife width when the determination means determines "large" or "small" based on the average bank amount thus obtained. Therefore, suitable control can be performed even for equipment using an AC motor as a drive unit of the feed mill conveyor. Even if the determination means determines that the average bank amount is within the “appropriate amount” range, the trend detection means captures the transition of the average bank amount as a correlation coefficient, thereby increasing from the median of the appropriate amount range. It is designed to accurately determine whether it has a tendency to increase, decrease, or has no tendency.If an increase or decrease is confirmed, this is determined by convergence means. Since the knife width is controlled for correction, the control can be facilitated and assured.

In the case where there is no tendency, the factor control is performed, so that the control can be performed without waste by preventing the occurrence of hunting and the like.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the bank control device of the present invention has a calender device 1 and a supply means 2 for supplying a material to the calender device 1. The calendar device 1
Has first to fourth calender rolls 3, 4, 5, and 6, the first and second calender rolls 3, 4 are arranged adjacent to each other in the lateral direction, and the second and third calender rolls 4,
5 are arranged adjacent to each other in the vertical direction, and the third and fourth calender rolls 5 and 6 are arranged adjacent to each other in the horizontal direction. The first to fourth calendar rolls 3, 4, 5, 6 are:
It is rotationally driven by a roll drive motor 7. This motor 7 is a variable speed motor. In the illustrated example, one motor 7 is shown, but it may be provided for each roll.

The first and second calender rolls 3, 4
An upper bank portion 8 is formed between them, and a lower bank portion 9 is formed between the third and fourth calender rolls 5 and 6.
A textile code (not shown) is conveyed from one side to the second and third calender rolls 4 and 5 from one side thereof, and upper and lower banks 8 are provided on both upper and lower surfaces of the textile code.
The sheet-like product is sent out to the other side while the material from the lower bank section 9 is polymerized.

The supply means 2 includes a feed mill 12 for kneading a material such as rubber, an upper knife 13 and a lower knife 14 provided at an outlet of the feed mill 12, and a discharge through each of the knives 13. Feed mill conveyors 15 and 16 for supplying the material to be supplied to the upper bank section 8 and the lower bank section 9. The upper and lower knives 13 and 14 regulate the width of the material discharged from the feed mill 12, and width adjustment devices 17 and 18 are connected to the knives 13 and 14, respectively. By these upper and lower width adjusting devices 17 and 18, the knife width of the upper knife 13 and the knife width of the lower knife 14 can be independently adjusted.

The upper and lower feed mill conveyors 15,
16 are driven by an AC type conveyor drive motor (not shown) at a constant speed and in synchronization with each other. In order to measure the bank amount of the material supplied to the upper and lower bank sections 8, 9, an upper measuring section 20 and a lower measuring section 21 are provided.
Is provided. These upper and lower stage measuring means 20, 21
Consists of a plurality of sensors provided along the axial direction of each of the calender rolls 3, 4, 5, and 6. The number of sensors is preferably about 3 to 5 for each of the upper and lower sides (in the illustrated example, three for each, and a total of six). A non-contact type distance sensor such as an optical type, an ultrasonic type and an electromagnetic type is used for each sensor, and the distance from each sensor to the surface of the upper and lower banks 8 and 9 is output as measurement data.

The upper measuring means 20 includes an upper controlling means 2
2 and a lower control means 23 in the lower measurement means 21.
Each is electrically connected. Since these upper and lower control units 22 and 23 have the same configuration,
The upper control means 22 will be described, and the lower control means 23 will not be described in detail. The upper control unit 22 is configured by electrically connecting the averaging unit 25, the determination unit 26, the correction unit 27, the tendency detection unit 28, the convergence unit 29, and the calculation unit 30 to each other.

The averaging means 25 receives measurement data from each sensor of the upper measuring means 20.
Further, the upper line speed data actually measured by the first and second calender rolls 3 and 4 is input to the calculating means 30. The correcting means 27 and the convergence means 2
9. The arithmetic means 30 selects one of them and outputs a control signal to the width adjusting device 17 of the upper knife 13.

The upper averaging means 25 operates as follows. That is, first, as shown in FIG. 2, when each sensor of the upper stage measuring means 20 is P, Q, R, the number of these sensors P, Q, R is L (for example, L = 12) over time. After measuring the measurement data, a plurality of the measurement data are excluded from those having a large numerical value and a plurality of measurement data (for example, L / 4 = 3 each) are selected from those having a small numerical value. In the example, six measurement data are averaged. Then, the average value thus obtained is used as the measured value p, q, r for each sensor P, Q, R.
After obtaining the average value among the measured values p, q, and r, the obtained average value is used as the bank amount B (bank height [unit: c
m]).

Subsequently, by repeating such calculation processing, a plurality (b ₁ , b ₂ , b ₃ ,...) Of bank amounts B are obtained over time as shown in FIG. Then, from the latest bank amount (b _m ), a past predetermined number (for example, M =
10), and average them to calculate the average bank amount BA. This average bank amount BA
Is repeated every time one bank amount B is obtained (that is, the target bank amount B is shifted one by one).

The judging means 26 judges whether the average bank amount BA obtained by the averaging means 25 is "large", "small" or "appropriate" as the bank state of the upper bank section 8. If it is determined to be "large" or "small", the result is output to the correction means 27, and if it is determined to be "appropriate", the result is output to the tendency detection means 28. ing.

The criterion for the determination is, for example, as shown in FIG.
The case of A> 4.8 is classified as “large”, the case of 4.8 ≧ BA ≧ 2.5 is “appropriate amount”, and the case of 2.5> BA is “small”. The specific numerical values shown in the examples are examples, and the present invention is not limited to these numerical values.) The correcting means 27 includes the upper knife 13
As a control signal to be output to the width adjusting device 17 of the above, the discriminating means 26 is “many” with respect to a preset reference knife width.
If the determination means 26 determines that the number is small, the predetermined knife width control coefficient (for example, 0.85) that is a negative factor is multiplied. It is configured to multiply by a coefficient (for example, 1.15).

The tendency detecting means 28 determines whether the average bank amount BA indicates "increase tendency" or "decrease tendency" in the appropriate amount range when the judgment means 26 judges "appropriate amount".
, Or in the state of “no tendency”, and if “increase tendency” or “decrease tendency” is determined, the result is output to the convergence means 29 and “trend” is output. When it is determined that "none", the result is outputted to the calculating means 30.

A tendency judging method in the tendency detecting means 28
Is done as follows. That is, as shown in FIG.
The latest average bank amount to BA_mAnd at this point
Average number of past banks (eg, M = 10)
BA_m-1, BA_m-2, BA_m-3, ... BA_m-9About
As shown in FIG._(Ten),
Y₍₉₎, Y₍₈₎, ... Y₍₁₎Toki, and corresponding to this
X time element_(Ten)= 10, X ₍₉₎= 9, X₍₈₎= 8,
... X₍₁₎= 1 and for Y and X, 1
Formula for calculating the correlation coefficient γ by performing the following regression
) To calculate the correlation coefficient γ
In other words, the average bank amount BA is captured.

[0025]

(Equation 1)

Then, the obtained correlation coefficient γ is γ> +
If it is 0.9 and the latest average bank amount BA _m is larger than the median of the appropriate amount range (see FIG. 4), this is determined as “increase tendency”. Further, the correlation coefficient γ is −0.9>
If it is γ and the latest average bank amount BA _m is smaller than the median of the appropriate amount range, this is determined to be “decreasing tendency”. Further, the correlation coefficient γ is + 0.9 ≧ γ ≧ −0.9
And if it is, if the latest average bank quantity BA _m is the median of the appropriate amount range, it is determined that "no trend".

The convergence means 29 is used as a control signal to be output to the width adjusting device 17 of the upper knife 13 when the tendency detecting means 28 determines "increase tendency" with respect to a preset reference knife width. When the tendency detecting means 28 determines “decreasing tendency” by multiplying by a predetermined tendency reversal coefficient (for example, 0.95) that is a negative factor, a predetermined tendency reversal coefficient (for example, 1.05) that is a positive factor Is configured to be multiplied.

[0028] The arithmetic means 30, when the tendency detecting means 28 as described above, it is judged "no _{trend", F n = KW n-1} · κ / CS n-1 · SPW However, KW: Knife width CS: Calendar speed SPW: Specification unit weight κ: Coefficient Subscript n means a factor Fn which is defined to mean the _nth control cycle.
And it has a configuration in which the factor F _n is controlled width adjustment device 17 of the upper knife 13 so as to be constant values.

[0029] By performing such control of the factor F _n, it is possible to keep the balance of the material into and out of the calendar. FIG. 6 is a flowchart showing the overall flow of the control. First, each sensor P, Q,
After R measures the data, the averaging means 25 certifies the measured values p, q, and r and calculates the bank amount B obtained by averaging them (steps 100 to 109).

The calculation of the bank amount B is performed a predetermined number of times to calculate the average bank amount BA, and the calculation of the average bank amount BA is repeated a predetermined number of times (step 100).
To 111). After a plurality of averaged bank amounts BA over time are obtained in this way, the determination means 26 performs determination (step 200).

As a result of the determination, when it is determined that the number is "many", the process proceeds from step 201 to step 207, where the control coefficient (for example, 0.85) which is a negative factor for the reference knife width.
Is multiplied. With this, the upper knife 13
Is narrowed, and the material passing amount is reduced, so that the bank amount of the upper bank portion 8 is returned to the appropriate amount range. If the result of the determination is “low”, step 2
The process proceeds from step 06 to step 207, in which control for multiplying the reference knife width by a control factor (for example, 1.15) as a positive factor is performed. As a result, the width of the upper knife 13 is increased and the material passing amount is increased, so that the bank amount of the upper bank portion 8 is returned to an appropriate range.

On the other hand, when the result of the determination is determined to be “appropriate amount”, the presence or absence of a tendency is further determined in step 202. As a result, when the “increase tendency” is determined, the process proceeds to step 207 via step 203, and the control coefficient (for example, 0.
95). As a result, the width of the upper knife 13 is slightly narrowed, and the material passing amount is reduced, so that the bank amount of the upper bank portion 8 converges to the median of the appropriate amount range.

If the result of the determination is "decreasing tendency", the process proceeds to step 207 via step 205, and the reference knife width is multiplied by a control factor (for example, 1.05) as a positive factor. Control is performed. As a result, the width of the upper knife 13 is slightly widened, and the material passing amount increases, so that the bank amount of the upper bank portion 8 converges to the median of the appropriate amount range.

If the result of the determination is that there is no tendency, the process proceeds to step 20 through step 204.
7 and the factor control is performed. These are repeated as a whole. The lower bank 9
In this case, the same control as that performed by the above-described upper measurement unit 20 and upper control unit 22 is performed by the lower measurement unit 21 and the lower control unit 23.

The present invention is not limited to the above-described embodiment. For example, the present invention is applicable to equipment in which a DC motor is used in a drive unit of a feed mill conveyor or a line in which a steel cord is embedded between material stacks. It can also be implemented.

[0036]

According to the present invention, the measuring means comprises a plurality of sensors provided along the axial direction of the calender roll, and based on data measured by each of these sensors. The averaging means performs an averaging process, and further repeats this process a predetermined number of times over time to calculate the average bank amount from the obtained plurality of bank amounts. It is possible to accurately grasp the appropriate bank amount and the tendency of its transition. Therefore,
It is possible to cope with structural differences such as those mentioned above.

In addition, the control means controls the correcting means to control only the knife width when the determining means determines "large" or "small" based on the average bank amount thus obtained. Therefore, suitable control can be performed even for equipment using an AC motor as a drive unit of the feed mill conveyor. Even if the determination means determines that the average bank amount is within the “appropriate amount” range, the trend detection means captures the transition of the average bank amount as a correlation coefficient, thereby increasing from the median of the appropriate amount range. It is designed to accurately determine whether it has a tendency to increase, decrease, or has no tendency.If an increase or decrease is confirmed, this is determined by convergence means. Since the knife width is controlled for correction, the control can be facilitated and assured.

In the case where there is no tendency, the factor control is performed, so that the control can be performed without waste by preventing the occurrence of hunting and the like.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a bank control device showing an embodiment of the present invention.

FIG. 2 is a diagram illustrating a measurement state of a measurement unit.

FIG. 3 is a diagram illustrating a calculation state of an average bank amount.

FIG. 4 is a plot diagram showing a relationship between a bank amount, an average bank amount, a correlation coefficient, and a knife width control state.

FIG. 5 is a diagram illustrating a procedure for obtaining a correlation coefficient.

FIG. 6 is a flowchart showing an overall flow of control.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Calender device 2 Supply means 8 Upper bank part 9 Lower bank part 12 Feed mill 13 Upper knife 14 Lower knife 20 Upper measuring means 21 Lower measuring means 22 Upper controlling means 23 Lower controlling means 25 Averaging means 26 Discriminating means 27 Correcting means 28 Trend detection means 29 Convergence means 30 Calculation means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-170875 (JP, A) JP-A-3-2499881 (JP, A) JP-A-4-105911 (JP, A) JP-A-4- 113817 (JP, A) JP-A-62-135902 (JP, A) JP-A-56-62125 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B29C 43/22-43 / 24 B29C 43/32-43/34 B29C 43/44-43/46 B29C 43/58

Claims (3)

(57) [Claims] 1. A supply means for cutting out a material kneaded by a feed mill (12) with knives (13) and (14) and supplying it to bank sections (8) and (9) of the calender, and a bank section (8) of the calender. ) (9) measuring means (20) (21) for measuring the bank amount, and the measuring means (20) (2)
1) In a calendar bank control device comprising control means (22) and (23) for controlling the bank amount to an appropriate value based on the measurement result for each control cycle, the measuring means (20) and (21) , A plurality of sensors (P, Q, R) provided along the axial direction of the calender rolls (3, 4, 5, 6). The control means (22) (23) Measurement means (2
0) An averaging process is performed based on the measurement data measured by the sensors (P, Q, R) of (21) to obtain the bank amount (B), and after the averaging process is repeated with time, Averaging means (2) for calculating the average bank amount (BA) from the latest bank amount by going back a predetermined number of past bank amounts.
5) determining means (26) for determining whether the average bank amount (BA) obtained by the averaging means (25) is "large", "small", or "suitable amount"; A correction means (27) for multiplying a reference knife width by a predetermined knife width control coefficient when the determination means (26) determines "large" or "small"; Control device. 2. The control means (22) and (23), when the determination means (26) determines that the amount is “appropriate amount”,
A predetermined number of past average bank amounts are traced back from the latest average bank amount, and those average bank amounts are linearly regressed in relation to time, so that the increasing / decreasing tendency of the average bank amount (BA) is obtained as a correlation coefficient (γ). And a convergence means (29) for multiplying the reference knife width by a predetermined tendency reversal coefficient based on the increasing tendency or the decreasing tendency determined by the tendency detecting means (28). 2. The calendar bank control device according to claim 1, wherein: 3. The control means (22) and (23), when the tendency detecting means (28) judges "no tendency", Fn = KWn-1..kappa. / CSn-1.SPW where KW : Knife width CS: Calendar speed SPW: Spec unit weight κ: Coefficient Subscript n finds a factor Fn which is defined as meaning the nth control cycle for each control cycle.
3. The calendar bank control device according to claim 2, further comprising an arithmetic means for controlling the knife width so that the factor Fn has a constant value .