JP3156797B2 - Calendar bank amount control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a calender for rolling a molding material supplied from a material supply device to form a sheet or film-like member. It is intended to prevent fluctuation and perform stable molding.

[0002]

2. Description of the Related Art A calender for forming a sheet or film of rubber, plastic or the like is usually constituted by combining three to four rolls in parallel, and rolling the material continuously two or three times to form a sheet or film. Is molded. In the calendar, it is necessary to pay attention to the amount of bank, that is, the amount of material accumulated between rolls. That is, if the amount of the bank is too large (the bank is too thick), there is a possibility that air will be trapped and a flaw called a skip will occur. In addition, since the rotation of the bank is not performed smoothly, the kneading of the material becomes uneven and the quality becomes uneven. There is a disadvantage that occurs. On the other hand, if the bank amount is too small (the bank is thin), there is a possibility that a problem such as cutting of the sheet or film or variation in thickness becomes large. Therefore, conventionally, in order to prevent this, the first
The bank amount of the bank is detected by a bank sensor such as a television camera, and the supply amount of the material supply device is feedback-controlled so that the value is maintained at a predetermined value.

However, in such a control method, the supply amount of the material supply device is changed after detecting that the bank amount has changed. Therefore, when the distance from the material supply device to the calendar is long, the bank amount is reduced. Even if the material supply device changes the supply amount immediately after detecting the change in the supply amount, it takes time for the changed part of the supply amount to reach the calendar, and it takes time for the bank amount to be corrected. Was. For this reason, especially when the molding speed of the calendar was changed, the fluctuation of the bank amount was large, and stable production was not possible.

FIG. 2 shows an example in which such a disadvantage in the prior art is improved to suppress the fluctuation of the bank amount when the molding speed is changed. This is because, when the molding speed is changed, the material supply amount of the material supply device is forcibly changed by an amount corresponding to the change in the molding speed, so that there is no need to wait for a change in the bank amount due to the change in the molding speed. Then, the material supply amount can be adjusted, and thereafter, a change in the bank amount is detected and feedback control is performed.

In the calendar device 1 shown in FIG. 2, the molding material supply device 10 is constituted by an extruder 12. Extruder 1
2 is rotationally driven by a motor 22 to extrude the molding material 14 in a mixed manner. The discharge amount of the extruder 12 per unit time is determined by the rotation speed of the motor 22. This rotation speed is detected by a speed detector 23 such as a tacho generator.

[0006] The rotation speed of the motor 22 is controlled manually or automatically. In the case of manual operation, the switch 29 (relay contact of the automatic / manual changeover switch) is turned off at the contact 29a,
The contact 29b is turned on, and the operator controls the speed of the motor 22 via the extruder rotation speed control device 32 by manually setting the extruder rotation speed setting device 30 while observing the top bank amount. In the case of automatic operation, the switch 29 is turned on at the contact 29a and the contact 29b is turned off, and the bank amount feedback control signal f from the bank amount control device 62 is supplied to the extruder rotation speed control device 32 via the amplifier 31. , Motor 2
2 is controlled.

The molding material 14 extruded from the extruder 12
Is supplied to a feed conveyor 16 as a molding material conveying device. The feed conveyor 16 is driven by a motor 18, a speed is detected by a speed detector 19 such as a tacho generator, and the feed conveyor speed controller 20
The speed is controlled to a constant speed manually set by the feed conveyor speed setting device 22. The feed conveyor 16 conveys the molding material, and feeds the first and second rolls 25, 25 of the calendar 24.
26 to the top bank 28. At this time, the feed conveyer 16 reciprocates in the width direction of the roll at a predetermined cycle around the point a near the right end so as to evenly supply the top bank 28 in the width direction.

Each of the rolls 25 to 28 of the calendar 24 usually has a DC motor 34 and a speed detector 38 for each roll (only the fourth roll 28 is shown). Based on manual setting by a calendar speed setting device 37. Are driven at a constant speed ratio with each other by a calendar speed control device 36. The raw materials supplied between the first and second rolls 25 and 26 are finally formed between the rolls while being sequentially formed between the rolls.
Formed as a sheet 40 on roll 28. The sheet 40 is stretched between the fourth roll 28 and the take-off roll 42 to form a sheet 40 ′, and cooled and solidified by the cooling roll 43 to form a product sheet 40 ″.
At 4, the product roll 46 is formed.

A take-up device 48 from the take-off roll 42 to the cooling roll 43 is composed of a number of rolls, and is divided into appropriate roll groups, and inverter motors 49, 50,.
The speed is controlled by the take-off line speed control device 56 as 4,. In particular, the speed ratio between the fourth calendar roll 28 and the take-off roll 42 is set by a take-off roll draw setting device 58, and operation is performed with an appropriate speed ratio (normally, the take-off roll 42 is 2.0 to 4.0 times faster). The roll groups thereafter are subjected to so-called uniform speed control in which the operation speed is controlled at a constant speed ratio by a draw setting device 60 (only one roll is shown) of each roll.

The bank amount control device 62 includes a bank sensor 6
3 , the amount of the top bank 28 is detected, and the excess or deficiency relative to the reference bank amount is determined. Further, a line speed V [m / min] detected by the speed detector 54, a sheet thickness H [g / m ² ] detected by the β-ray thickness meter 64,
The sheet width W [m], which is detected by the sheet width detector 66 obtains the _{Q 0 [kg / min] =} V × H × W × molding material consumption Q ₀ from 10 ^-3. Then, a value Q (=) obtained by adding the obtained molding material consumption amount Q ₀ and an increase / decrease amount ΔQ of the discharge amount of the extruder 12 within the control cycle time for correcting the excess or deficiency of the bank amount. Q ₀ + ΔQ), and the corresponding extruder rotation speed command value N (= N ₀₎
+ ΔN (N ₀ : the number of rotations for discharging Q ₀ , ΔN: the number of rotations for discharging ΔQ)) is output as an extruder rotation speed control signal f to control the rotation speed of the extruder motor 22.

According to such control, the bank sensor 6
The control of the extruder discharge amount based on the detection of the bank amount by 3 suppresses the fluctuation of the bank amount. Further, when the molding speed is changed by the calendar speed setting device 37, the extruder discharge amount is forcibly increased or decreased by the amount of the change of the molding material consumption, thereby suppressing the fluctuation of the bank amount.

[0012]

According to the conventional apparatus shown in FIG. 2, when the molding speed is changed, or when the bank amount is excessive or insufficient even during the steady operation, the extruder 12 (molding material supply device) is used. The change in the discharge amount of the top bank 28 suppresses the change in the bank amount of the top bank 28. However, the feed conveyor 16
Since the speed of the (molding material conveying device) is constant, the extruder 12
, A time delay occurs from the change in the discharge amount to the time when the change in the discharge amount reaches the topper bank 28. For this reason, the fluctuation of the bank amount of the top bank 28 could not be completely suppressed. An object of the present invention is to solve the problems in the prior art and to provide a calendar bank amount control method capable of more reliably suppressing the fluctuation of the bank amount of the top bank at the time of changing the molding speed or at the time of steady operation. is there.

[0013]

According to the first aspect of the present invention,
In a calendar device for supplying a molding material supplied from a molding material supply device to a calendar via a molding material conveying device to form a sheet-like or film-like member, the molding material supply according to the amount of molding material consumed in the calendar. The molding material supply amount of the apparatus is variably controlled, and the molding material conveyance amount per unit length in the molding material conveyance device is controlled so as to be substantially constant regardless of a change in the molding material supply amount due to the variable control. The transfer speed of the molding material transfer device is variably controlled.

According to a second aspect of the present invention, in the first aspect of the present invention, the amount of molding material supplied by the molding material supply device is detected so as to correct the excess or deficiency of the bank amount of the calendar. In addition to the variable control, the conveying speed of the molding material transport device is set such that the molding material transport amount per unit length in the molding material transport device is substantially constant regardless of a change in the molding material supply amount due to the variable control. Is variably controlled.

[0015]

According to the first aspect of the present invention, when the molding speed is changed, the molding material supply amount changes accordingly, and the molding material conveyance speed also changes, so that the supply amount to the top bank is reduced. Change without time delay. Therefore, the fluctuation of the bank amount is reliably suppressed, and a stable operation can be performed.

According to a second aspect of the present invention, in the first aspect of the present invention, the amount of molding material supplied and the conveying speed are varied so as to detect the amount of the bank of the calendar and correct the excess or deficiency. Since the control is performed, the fluctuation of the bank amount can be suppressed more reliably.

[0017]

【Example】

(Embodiment 1) A first embodiment of the present invention is shown in FIG. This is an application of the present invention to the conventional device of FIG.
The molding material supply device is constituted by an extruder, and the molding material transport device is constituted by a feed conveyor. 2 are denoted by the same reference numerals. In the calendar device 1 of FIG. 1, the molding material supply device 10 includes an extruder 12. The extruder 12 is rotationally driven by a motor 22 to knead and extrude the molding material 14. The discharge amount (molding material supply amount) of the extruder 12 per unit time is determined by the motor 2
2 is determined by the rotation speed. This rotation speed is detected by a speed detector 23 such as a tacho generator.

The rotation speed of the motor 22 is controlled manually or automatically. In the case of manual operation, the switch 29 (relay contact of the automatic / manual changeover switch) is turned off at the contact 29a,
The contact 29b is turned on, and the operator controls the speed of the motor 22 via the extruder rotation speed control device 32 by manually setting the extruder rotation speed setting device 30 while observing the top bank amount. In the case of automatic operation, the switch 29 is turned on at the contact 29a and the contact 29b is turned off, and the extruder rotation speed control signal (N = N ₀ + ΔN) from the bank amount control device 62 is transmitted via the amplifier 31 to the extruder rotation speed. The control signal is supplied to the control device 32 to control the speed of the motor 22.

The molding material 14 extruded from the extruder 12
Is supplied to a feed conveyor 16 as a molding material conveying device. The feed conveyor 16 is driven by a motor 18, a speed is detected by a speed detector 19 such as a tacho generator, and the speed is controlled by a feed conveyor speed control device 20. The feed conveyor drive motor 18
For example, an inverter motor or the like that can control the speed in a wide range can be used. The feed conveyor 16 conveys the molding material, and feeds the first and second rolls 25 and 2 of the calendar 24.
6 to the top bank 28. At this time, the feed conveyer 16 reciprocates in the width direction of the roll at a predetermined cycle around the point a near the right end so as to evenly supply the top bank 28 in the width direction.

Each of the rolls 25 to 28 of the calendar 24 usually includes a DC motor 34 and a speed detector 38 for each roll (only the fourth roll 28 is shown). Are driven at a constant speed ratio with each other by a calendar speed control device 36. The raw materials supplied between the first and second rolls 25 and 26 are finally formed between the rolls while being sequentially formed between the rolls.
Formed as a sheet 40 on roll 28. The sheet 40 is stretched between the fourth roll 28 and the take-off roll 42 to form a sheet 40 ′, and cooled and solidified by the cooling roll 43 to form a product sheet 40 ″.
At 4, the product roll 46 is formed.

The take-off device 48 composed of the take-off rolls 42 to the cooling rolls 43 is composed of a large number of rolls and is divided into appropriate roll groups, and inverter motors 49, 50,. , 52, 54,... Are controlled by a take-off line speed controller 56. In particular, calendar fourth roll 2
The speed ratio between the take-off roll 42 and the take-off roll 42 is set by a take-off roll draw setting device 58, and the vehicle is operated at an appropriate speed ratio (normally, the take-off roll 42 is 2.0 to 4.0 times faster). The group of rolls is so-called uniform speed control in which the operation speed is controlled at a constant speed ratio by a draw setting device 60 (only one roll is shown) of each roll.

The bank amount control device 62 includes a bank sensor 6
3 , the amount of the top bank 28 is detected, and the excess or deficiency relative to the reference bank amount is determined. Further, the line speed V [m / min] (line speed is generally 2 to 4 times the calendar speed) detected by the speed detector 54 and the sheet thickness H [g / g] detected by the β-ray thickness meter 64. and m ^2], the sheet width W [m], which is detected by the sheet width detector _{66, Q 0 [kg / min} ] = V × H × W × 10 -3 (1) molding material consumption Q ₀ from Ask for. Then, the extruder rotation speed N ₀ for discharging the obtained molding material consumption amount Q ₀ and the discharge amount of the extruder 12 within the control cycle time for correcting the excess or deficiency of the bank amount are described. The rotational speed ΔN of the extruder for discharging the increase / decrease amount ΔQ is obtained, and the addition amplifier 3
In step 1, the extruder rotation speed command value N (= N ₀ +
ΔN). Thus, during automatic operation (contact 29a of switch 29 is on, contact 29b is off), extruder 12 discharges a required discharge amount Q (= Q ₀ + ΔQ). It should be noted that even during manual operation (contact 29a is off, contact 29b is on), the extruder rotation speed setting device 30
Is set once, the calendar speed signal V ₀ set by the calendar speed setting device 37 is supplied to the extruder rotation speed setting device 30, so that even if the calendar speed is changed, the extruder 12 Is variably controlled to obtain a discharge amount corresponding to the molding material consumption amount.

The bank amount controller 62 controls the speed of the feed conveyor 16 (the amount of molding material transported per unit time).
The control signals v ₀ and Δv are output. Among them, v ₀ is the speed corresponding to the extruder discharge amount Q ₀ , and Δv is the extruder discharge amount ΔQ
Is the speed corresponding to FIG. 3 shows the relationship between the rotation speed of the extruder and the speed of the feed conveyor.

The addition amplifier 70 adds v ₀ and Δv, and outputs v (= v ₀ + Δv) as a speed control signal for the feed conveyor 16. Switch 72 is switch 29
This is a relay contact of an automatic / manual change-over switch interlocked with the switch. During the automatic operation, the contact 72a is turned on and the contact 72b is turned off.
2b is turned on. Then, at the time of automatic operation, the feed conveyor speed control signal v is input to the feed conveyor speed control device 20, and the speed of the feed conveyor 16 is controlled to a speed corresponding to the extruder discharge amount as shown in FIG. According to such control, the extruder discharge rate (Kg / mi
Regardless of the size of n), a constant molding material 14 is always placed on the feed conveyor 16, so that the molding speed (here, "molding speed" is a concept of the fast / slow state of molding in the calendar section). It has a meaning close to “calendar speed”.) When the bank amount becomes excessive or deficient even at the time of change or steady operation, the calendar top bank from the feed conveyor 16 follows the fluctuation of the extruder discharge amount. Since the supply amount to the top bank 28 fluctuates immediately, even when the molding speed is changed, the fluctuation in the bank amount of the top bank 28 is completely suppressed.

This state will be described with reference to FIG. Now
As shown in FIG. 4A, when the molding material 14 is extruded from the extruder 12 at a constant extrusion rate, and is conveyed at a constant speed by a feed conveyor 16, and molding is performed at a constant molding speed. I do. Consider a case in which the molding speed is increased from this state to produce the same product. At this time, in the conventional apparatus of FIG. 2, as shown in FIG. 4B, even if the extrusion amount of the extruder 12 is increased, the speed of the feed conveyor 16 remains constant. Is the top bank 28
, A time delay occurs, and during that time, the bank amount of the top bank 28 decreases. That is, the total amount of the molding material 14 on the feed conveyor 16 fluctuates according to the molding speed, and the amount of the top bank increases / decreases by the fluctuation.

On the other hand, in the calendar device of FIG.
If the extrusion rate of the extruder 12 fluctuates due to a change in the molding speed, the speed of the feed conveyor 16 increases by an amount corresponding to the change in the extrusion rate. The supply of molding material to the bank 28 increases immediately. That is, when producing the same product, the total amount of the molding material 14 on the feed conveyor 16 is always constant irrespective of the molding speed, so that the top bank amount does not change. Thereby, a stable operation can be performed.

In FIG. 1, the feed conveyor speed adjuster 74 is for manually setting the feed conveyor speed during manual operation. Since the calendar speed signal V ₀ is supplied to the adjuster 74 via the extruder rotation speed setting device 30, once set, the speed of the feed conveyor 16 changes following the molding speed. Also, when the extruder rotation speed setting device 30 is adjusted, the speed of the feed conveyor 16 changes accordingly. This suppresses a change in the top bank amount due to a change in the molding speed even during manual control.

As described above, according to the calendar apparatus shown in FIG. 1, the following operation can be obtained. Regarding the same product, even if the molding speed is changed, the extruder discharge amount and the feed conveyor speed follow this, so that the supply amount to the top bank 28 changes immediately, and the fluctuation of the top bank amount is suppressed. Even event insufficient follow the extruder discharge rate or feed conveyor speed to changes in extrusion rate, vans
Since the feed bank control based on the bank amount detection of the sensor 63 operates in the next control cycle time, the fluctuation of the bank amount is corrected. Since there is no transfer delay from the extruder 12 to the calendar top bank 28, hunting is prevented even if the response is increased by increasing the feedback gain of the control based on the detection of the bank amount.

Although the case where the same product is manufactured has been described above, when a different product is manufactured, the discharge amount of the extruder 12 is naturally increased by the product thickness × product width even if the line speed is the same. Be changed. In this case, regardless of the product type, if the relationship between the extruder discharge rate and the feed conveyor speed is uniquely defined, when making narrow and thin products, the foot conveyor speed will be extremely slow, during which time The molding material is undesirably cooled. Therefore, as shown in FIG. 5, by changing the relationship between the extruder discharge rate and the feed conveyor speed depending on the type of product, the line speed and feed conveyor speed can be determined regardless of the type of product (weight per unit length, etc.). And keep the relationship constant. By doing so, the cooling state of the molding material reaching the top bank can be kept constant regardless of the product type. In order to perform such control, a table as shown in FIG. 5 is stored in the bank amount control device 62 of FIG. 1, and the speed of the feed conveyor speed with respect to the calendar speed according to the detected product thickness and width. The coefficient is automatically changed (the speed coefficient can also be manually changed so as to obtain the relationship shown in FIG. 5). According to such control, the total amount of the molding material 14 on the feed conveyor 16 differs for each product, but is constant for the same product.

(Embodiment 2) FIG. 6 shows a second embodiment of the present invention.
Shown in This is such that the extruder rotation speed control signal N ₀ and the conveyor speed control signal v ₀ in FIG. 2 are given manually by the extruder rotation speed setter 30 and the feed conveyor speed adjuster 74. According to this, the extruder rotation speed command signal N ₀ proportional to the calendar speed is input to the extruder rotation speed control device 32 regardless of whether the bank amount is automatically controlled or the vehicle is manually operated, and the extruder rotation speed N ₀ It is conveyor speed command signal v ₀ in proportion to being input to the feed conveyor speed controller 20.

When the bank amount is automatically controlled (the switches 29a and 72a are turned on), the bank amount controller 62 obtains the excess / deficiency amount (Kg) of the top bank 28 by the bank sensor 63 , and determines the excess / deficiency. From the amount and the control cycle, a required increase / decrease amount ΔQ (Kg / min) of the extruder discharge amount is obtained. Then, an extruder rotation speed (increase / decrease) control signal ΔN necessary for discharging the same is calculated, and the extruder rotation speed control device 32 is calculated.
As a control signal. The control device 32 controls the speed of the extruder motor 22 using a value N (= N ₀ + ΔN) obtained by adding ΔN to N ₀ set by the extruder rotation speed setting unit 30 as a command value.

Further, the bank amount control device 62 calculates the ΔQ
Conveyor speed increase / decrease Δv (m / min) using
Is obtained from the following equation (2), and is output to the feed conveyor speed control device 20. Δv ₌ ΔQ (2) v ₀ Q ₀ Q ₀ : molding material consumption amount (Kg /
min) v ₀ : Conveyor speed (m / min) manually set by the feed conveyor speed regulator 74. As can be seen from FIG. 7, the expression (2) sets the feed conveyor speed v to the operating point (v ₀ , Q ₀ ) and origin 0
It is nothing more than controlling on the line connecting the points.

(Embodiment 3) FIG. 8 shows a third embodiment of the present invention.
Shown in This is one in which the molding material supply device 10 is configured by a mixing mill 80. The supply amount of the molding material from the mixing mill 80 is given by the following equation (3). Molding material supply amount [Kg / min] = knife width [mm] x roll speed [m / min] x strip thickness [mm] x specific weight [g
/ Cm ³ ] × 10 ^-3 (3) When a mixing mill is used, one or more of the three parameters (knife width, roll speed, strip thickness) in equation (3) are used in combination. A necessary molding material supply amount Q (= Q ₀ + ΔQ) may be given, and the feed conveyor speed may be changed in proportion to Q.

In general, the mixing mill is difficult to adjust the roll speed in a wide range according to the discharge amount due to the problem of kneading the molding material, and is often operated at a substantially constant speed. At this time, the material supply amount is given by adjusting the width of the strip knife 82 (the material cutting width).

The control of the strip knife width is performed as follows. As described above, the necessary supply amount of the molding material needs to be given by Q (= Q ₀ + ΔQ). Therefore, the line speed is measured at every fixed cycle (for example, every one second), the necessary molding material supply amount is obtained by the equation (1), and the necessary strip knife width is calculated by the equation (3) to obtain the knife width. Control device 84 (servo amplifier),
The tracking of the strip knife 82 is controlled by a servo drive mechanism composed of a servo motor 86 and a strip width measuring potentiometer 88. In this way, the strip width can be made almost completely proportional to the required supply amount Q (= Q ₀ + ΔQ), and the material supply amount can be set to Q. The potentiometer 90 is for measuring a roll gap and is used for detecting a strip thickness.

The roll of the mixing mill 80 is operated at a constant speed by a motor 92 here.
At this time, if the feed conveyor 16 is changed in proportion to the discharge amount Q, a trouble such as the strip 94 being cut at the mill outlet may occur. In order to avoid this, a mill conveyor 96 operated at a constant speed v ₀ may be provided in front of the feed conveyor 16, and a speed difference between the mill conveyor 96 and the feed conveyor 16 may be provided. In this case, even if the strip 94 is cut at a speed difference, the strip 94 is generated on the mill conveyor 96.
The molding material 14 can be supplied without any trouble. In this case, when the molding speed is changed, the mill conveyor 9 is changed.
6, a delay of length L ₀ occurs. However, since the length L ₀ may be very short, the influence on the fluctuation of the bank amount is small.

FIG. 9 which is often used in rubber lines
The strip cutting device 100 of the mill conveyor 9
6 and the feed conveyor 16 to cut the feed strip 94. This case, if the feed conveyor 16 performs speed control in proportion to Q, in the same manner as described above, the time delay of the supply amount at the time of changing the molding speed requires only the length of the L _0.

When the mixing mill speed can be changed over a wide range depending on the molding material,
If the roll speed of the mixing mill 80 is made proportional to Q, the molding material supply amount Q can be obtained even if the strip width is constant according to the equation (3).
And the feed conveyor speed is made proportional to Q, there is no problem of the delay due to the length L ₀ (the mill conveyor 96 is also linked to the feed conveyor 16). In FIG. 8, the knife width setting device 10 is used.
Numeral 2 is for manually setting the knife width.

(Embodiment 4) FIG. 1 shows a fourth embodiment of the present invention.
0 is shown. This is one in which a strainer is arranged between the mixing mill 80 and the feed conveyor 16 in the embodiment of FIG. In this case, the strainer 104 does not adjust the supply amount of the molding material, but the mixing mill 80.
The molding material 14 is sent to the calendar 24 while removing (straining) the dust from the molding material 14 sent from the company.

The strainer 104 is a strainer motor 10
5, and the number of rotations is detected by the speed detector 107. The speed of the strainer motor 105 in the case of automatic commanded by strainer speed control signal N _ST, is controlled by a strainer speed control system 108. In the case of manual operation, a command is issued by the strainer rotation speed adjuster 109 .

The strainer conveyor 106 includes a motor 111
, And its rotation speed is detected by a speed detector 113 . Speed of the motor 111 in the case of automatic commanded by strainer conveyor speed control signal v _ST, is controlled by a strainer conveyor speed controller 115. In the case of manual operation, it is instructed by the strainer conveyor speed adjuster 117.

In the case of the above arrangement, it takes about 30 to 60 seconds from the mixing mill 80 to the top puncture 28 of the calendar 24. In the conventional automatic control, the transfer delay is fatal, and there is a problem in control responsiveness and stability. On the other hand, in the apparatus shown in FIG. 10, the delay at the time of changing the molding speed can be greatly reduced by controlling as follows. Mixing mill 80 for supplying molding material
8 and Q (= Q ₀ + Δ) according to the line speed and the bank excess / deficiency amount, as in the example of FIG.
Supply the molding material of Q). The strainer conveyor 106 and the strainer 104 before the strainer 104
Feeder 16 is controlled to each conveyor speed (speed control signals v _ST and v) proportional to the above Q. Strainer rotational speed controller 108 receives a strainer speed control signal N _ST for ejecting material supply amount Q, if to change the strainer rotational speed as shown in FIG. 11 in accordance with the ejection characteristics of the strainer 104, forming speed At the time of the change, there is almost no delay in the supply amount, and the fluctuation in the bank amount can be suppressed.

(Embodiment 5) FIG. 1 shows a fifth embodiment of the present invention.
It is shown in FIG. This controls the amount of bank of the mixing mill 80 in the embodiment of FIG. As a kneader, an extruder 112 and a mixing mill 80 are provided. The molding material 14 discharged from the extruder 112 is supplied to a bank 116 of the mixing mill 80 via an extruder conveyor 114. The bank amount of the bank 116 is detected by a bank sensor 118.

The extruder 112 is driven by an extruder motor 120, and its rotation speed is detected by a speed detector 112. If the speed of the extruder motor 120 is automatic, it is commanded by an extruder rotation speed control signal N (= N ₀ + ΔN), and is controlled by the extruder rotation speed control device 123. In the case of manual operation, an instruction is given by the extruder rotation speed setting device 125.

The extruder conveyor 114 is driven by a motor 124, and the number of revolutions is detected by a speed detector 126.
The speed of the motor 124 is instructed by an extruder conveyor speed control signal v _{ex in} the case of automatic operation, and is controlled by an extruder conveyor speed control device 128. In the case of manual operation, it is commanded by the extruder conveyor speed regulator 130.

In the apparatus shown in FIG. 12, the following control is performed. The material supply from the cutting of the strip of the mixing mill 80 to the calendar 24 is the same as that of the embodiment of FIG. 8, and the strip width and the feed conveyor speed are respectively W (= W ₀ + ΔW) and v (= v ₀ + Δ).
v). W ₀ : Reference strip width corresponding to line speed v ₀ : Feed conveyor speed corresponding to line speed ΔW: Change in strip width corresponding to excess or deficiency of calendar top bank 28 Δv: Excess or deficiency of calendar top bank 28 The material supply from the extruder 112 to the mixing mill 80 is performed in the same manner as described above, and the extruder rotation speed and the extruder conveyor speed are respectively N ₀ + ΔN + Δ.
N ′, v _ex + Δv _ex + v ′ _ex or N ₀ + Δ
N ′, v _ex + Δv ′. Where, N ₀ : extruder rotation speed corresponding to line speed v _ex : extruder conveyor speed corresponding to line speed ΔN: extruder rotation speed increase / decrease amount corresponding to excess or deficiency of top bank amount of calendar Δv _ex : calendar Extruder conveyor speed increase / decrease amount corresponding to excess / deficiency of the top bank amount ΔN ′: Extruder rotation speed increase / decrease amount based on excess / short amount of bank on mixing mill 80 Δv ′ _ex : Excessive bank amount on mixing mill 80 Extruder conveyor speed increase / decrease based on shortage

[0047]

As described above, according to the first aspect of the present invention, when the molding speed is changed, the molding material supply amount changes accordingly, and the molding material conveyance speed also changes. , The supply amount to the top bank changes without time delay. Therefore, the fluctuation of the bank amount is reliably suppressed, and a stable operation can be performed.

According to the second aspect of the present invention, in the first aspect of the present invention, the amount of the molding material supplied and the transfer speed are varied so as to detect the amount of the bank of the calendar and correct the excess or deficiency. Since the control is performed, the fluctuation of the bank amount can be further suppressed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional device.

FIG. 3 is a diagram showing a relationship between an extruder rotation speed and a feed conveyor speed in the embodiment of FIG.

FIG. 4 is a view showing a difference in operation between the conventional apparatus and the apparatus of the embodiment in FIG. 1 when the molding speed is changed.

FIG. 5 is a diagram showing a difference in a relationship between an extruder discharge amount and a line speed due to a difference in a product in the embodiment of FIG. 1;

FIG. 6 is a block diagram showing a second embodiment of the present invention.

FIG. 7 is a diagram showing a relationship between an extruder rotation speed and a feed conveyor speed in the embodiment of FIG.

FIG. 8 is a block diagram showing a third embodiment of the present invention.

FIG. 9 is a diagram showing a partially modified example of the embodiment in FIG. 8;

FIG. 10 is a block diagram showing a fourth embodiment of the present invention.

11 is a characteristic diagram of the strainer of FIG.

FIG. 12 is a block diagram showing a fifth embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 calendar device 10 molding material supply device 14 molding material 16 feed conveyor (molding material transport device) 24 calendar 28 bank 40 sheet-like or film-like member

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-63-21116 (JP, A) JP-A-61-32721 (JP, A) JP-A-59-187832 (JP, A) JP-A-59-18732 26220 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 43/00-43/58

Claims (2)

(57) [Claims] In a calendar device for supplying a molding material supplied from a molding material supply device to a calendar via a molding material conveying device to form a sheet-like or film-like member, the calendering device supplies the molding material in accordance with the amount of molding material consumed in the calendar. The molding material supply amount of the molding material supply device is variably controlled, and the molding material conveyance amount per unit length in the molding material conveyance device is substantially constant irrespective of a change in the molding material supply amount due to the variable control. A method for controlling a bank amount of a calendar, wherein the conveying speed of the molding material conveying device is variably controlled so that 2. A molding material supply amount of said molding material supply device is variably controlled so as to correct an excess or deficiency amount of a bank of a calendar, and the amount of molding material per unit length in said molding material transport device is adjusted. 2. The calendar according to claim 1, wherein the conveying speed of the molding material conveying device is variably controlled such that the molding material conveying amount is substantially constant regardless of a change in the molding material supply amount due to the variable control. Bank amount control method.