JP2924092B2 - Calendar material supply control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a material supply control device for a calendar.

2. Description of the Related Art A conventional calendar material supply amount control apparatus described in Japanese Patent Publication No. 62-57486 will be described with reference to FIGS. 3 and 4. FIG.

 In the figure, reference numeral 1 denotes a material supply device.

32 is a material extruder constituting the material supply device 1, 33 is a feed conveyor constituting the material supply device 1, 8 is a pair of parallel kneading rolls constituting the material supply device 1, and 9 is a material supply device 1. A knife device 10 for adjusting the supply amount of the material 3 ', a screw 10 arranged in parallel with the axis of the kneading roll 8, a guide rod 11 arranged in parallel with the screw 10, and a screw 12 for the screw 10. And a movable knife having a distal end in contact with the surface of the one kneading roll 8, and a movable knife 12 and a guide rod
A knife width 14 between the fixed knife 31 and the fixed knife 31 attached to the motor 11 is a motor connected to the screw 10 via the coupling 15.

In FIG. 3, reference numeral 2 denotes a swing conveyor which conveys the material 3 'cut out from the material supply device 1 to the bank 4' of the calendar 4, and the upper end of the swing conveyor 2 is centered on the lower end thereof. Reciprocatingly swings in the width direction.

Reference numeral 5 denotes a sheet material 6 rolled by a calendar 4 and a sheet material 6 '.
A take-off roll 7 is drawn out to the outside while being stretched, and a cooling roll 7 cools the sheet material 6 '.

In FIG. 3, reference numeral 37 denotes a bank sensor such as a monitor camera, 38 denotes a signal representing the bank amount detected by the bank sensor 37, 21 denotes an arithmetic and control unit that outputs a knife width adjustment signal 27 based on the bank amount signal 38, and 35 denotes A position detector 36 attached to the motor 14 is a feedback signal from the position detector 35.

 Next, the operation will be described.

First, in the material supply device 1, the material 3 is supplied from the material extruder 32.
And feeds the material 3 between a pair of kneading rolls 8, 8 'via a feed conveyor 33. And kneading rolls 8,8 '
Is rotated with the opposing portions facing downward to knead the material 3 supplied to the upper portion between the kneading rolls 8, 8 '.

The kneading of the material 3 is performed by mixing the upper material 3 between the kneading rolls 8 and 8 '.
Is crushed by the gap between the kneading rolls 8, 8 ', and the material 3 which has been crushed and taken out below the gap between the rolls is wound around one of the kneading rolls 8, and again the upper portion between the kneading rolls 8, 8'. This operation is performed by repeating the operation of returning to.

In the knife device 9 constituting a part of the material supply device 1,
As described later, the knife width adjustment signal 27
Is sent to the motor 14, the motor 14 is driven, the screw 10 rotates a required number of times, the moving knife 12 moves along the guide rod 11, and the knife width 13 between the moving knife 12 and the fixed knife 31 is adjusted. .

Thereby, it is wound around the kneading roll 8, and the kneading rolls 8, 8 '
A part of the material 3 being returned to the upper part between
12. The fixed knife 31 cuts out the knife 13 in width.

Therefore, the amount of material supplied from the material supply device 1 to the calendar 4 is determined according to the knife width 13.

In the swing conveyor 2, the material 3 ′ cut from the material supply device 1 by the knife device 9 is transferred to the bank 4 ′ of the calendar 4.
Transport to

At this time, the upper end of the swing conveyor 2 reciprocates in the width direction of the swing conveyor 2 around the lower end, and supplies the material 3 ′ to the bank 4 ′ of the calendar 4 uniformly in the width direction.

In the calender 4, the material 3 ′ conveyed from the swing conveyor 2 is formed in the gap between the calender rolls to produce the sheet material 6.

The sheet material 6 formed by the calendar 4 is pulled out by the take-off roll 5 to become 6 ', and then cooled by the cooling roll 7 and guided to the outside.

The bank amount signal 38 in the bank 4 ′ of the calendar 4 is detected by the bank sensor 37 and sent to the arithmetic and control unit 21.

When the bank amount signal 38 from the bank sensor 37 changes, the arithmetic and control unit 21 sends a knife width adjustment signal to the material supply device 1.
27, the knife width 13 of the material supply device 1 is adjusted so that the amount of the bank 4 'is constant.

[Problems to be Solved by the Invention] However, the conventional material supply amount control device for a calendar has the following problems.

That is, when the molding speed of the calendar 4 is changed, an increase or decrease in the amount of the bank 4 'is detected by the bank sensor 37, and the knife width 13 is adjusted accordingly.
There is a time delay corresponding to the material transport time of the swing conveyor 2 before the vehicle arrives at the bank 4 'of the calendar 4, and during this time the amount of the bank 4' fluctuates greatly. Takes a long time.

If the amount of the bank 4 ′ is not stable, it becomes an obstacle in producing a uniform sheet material 6.

The present invention has been made in view of the above circumstances, and has as its object to provide a calendar material supply amount control device that minimizes a change in the bank amount during transition before and after a change in the molding speed of the calendar.

Means for Solving the Problems The present invention relates to a bank sensor for detecting a bank amount of a calendar, and an arithmetic and control unit for sending a signal for changing a material supply amount to a material supply device based on the bank amount from the bank sensor. In a calender material supply amount control device provided with a calender, a molding speed detector for detecting a calendering speed, a sheet width detector and a sheet thickness for detecting a sheet width and a sheet thickness of a sheet material formed by the calendar When the sheet thickness is inputted along with the detector, the forming speed and the sheet width, and the forming speed of the calendar is changed, the changing of the forming speed of the calendar causes the material supply device to start changing the material supply amount. The amount of deviation between the amount of material consumed and the amount of material reached in the calendar until the time until the material supply amount has changed, and the material after the change in the material supply amount has been An arithmetic control unit for sending a signal for correcting the material supply amount to the material supply device based on a deviation between the material consumption amount and the material arrival amount of the calendar until the time reaches the material amount of the calendar. The present invention relates to a supply amount control device.

[Operation] The arithmetic and control unit sends a signal for changing the material supply amount to the material supply device based on the bank amount detected by the bank sensor to make the bank amount constant.

When the molding speed of the calendar is changed and the material consumption of the calendar is changed, the arithmetic and control unit determines the molding speed from the molding speed detector and the sheet width from the sheet width detector as well as the sheet from the sheet thickness detector. Enter the thickness and change the amount of material supplied from the material supply device to the calendar to an amount equal to the amount of material consumed by the calendar after changing the molding speed, and supply the material after the change in the molding speed of the calendar is started. The amount of deviation between the material consumption of the calendar and the amount of material that occurs before the device starts changing the material supply amount, and the difference between the material supply amount after the material supply device starts changing the material supply amount. A knife width adjustment signal is sent to the knife device of the material supply device to correct the material supply amount according to the deviation between the material consumption amount and the material arrival amount of the calendar that occurs until the material reaches the calendar. .

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

 1 and 2 show an embodiment of the present invention.

Reference numeral 28 denotes an arithmetic and control unit, which includes a sheet width 22 from the sheet width detector 16 and a sheet thickness 23 from the sheet thickness detector 17.
And the molding speed 24 from the molding speed detector 18 and the inter-roll gap 25 from the inter-roll gap detector 19, and calculate the material consumption of the calendar 4 by performing an operation described later based on these. After that, the knife width 13 necessary for matching the material supply amount of the material supply device 1 with the material consumption amount of the calendar 4 is determined, and the forming speed 24 of the calendar 4 is determined.
That is, when the material consumption is changed, the material consumption of time t ₁ calendar 4 from being changed molding rate calendar 4 until the material supply device 1 to initiate a change of the quantity of material fed and the material reaches the deviations to Q ₁ to the amount, the material consumption of transport time t ₂ calendar 4 up material 3 after the material supply volume change material supply apparatus 1 from the start of the change of the quantity of material fed reaches the calender 4 determine the amount and the deviation amount Q ₂ of the material arrival quantity, seeking knife width 13 necessary for correcting the quantity of material fed after the material consumption changes in deviations Q _1, Q ₂ of the material consumption, A knife width adjustment signal 29 is sent to the motor 14 of the knife device 9.

In the figure, reference numerals 34 and 34 'denote motors, and the motor 34 is provided with a speed detector 20 for detecting the roll speed 26 of the kneading roll 8. The conveyor conveyance speed by the motor 34 'is set to a value substantially equal to the roll surface speed of the kneading roll 8 by the motor 34.

 Next, the operation will be described.

The operation of forming the material 3 'cut out by the material supply device 1 with the calendar 4 and the operation of maintaining the amount of the bank 4' constant based on the bank sensor 37 are the same as those in FIGS.

When changing the production amount of the sheet material 6 ', the molding speed 24 of the calendar 4 is changed by a molding speed setting device (not shown).

Then, the molding speed 24 of the calendar 4 is increased or decreased, and the material consumption of the calendar 4 is changed.

When the molding speed 24 of the calendar 4 changes, the molding speed 24 from the molding speed detector 18 provided on the cooling roll 7 also changes, and the arithmetic control unit 28 changes the molding speed 24 of the calendar 4 according to the change of the molding speed 24. Determine what you have done.

When the molding speed of the calendar 4 changes, the arithmetic and control unit 28
Is obtained by multiplying the molding speed 24 from the molding speed detector 18, the sheet width 22 from the sheet width detector 16 and the sheet thickness 23 from the sheet thickness detector 17 to obtain the material consumption of the calendar 4. The material consumption is divided by the roll speed 26 of the kneading roll 8 from the speed detector 20 and the inter-roll gap 21 from the inter-roll gap detector 19 to make the amount of material supplied from the material supply device 1 equal to the material consumption. To obtain a knife width of 13
A knife width adjustment signal 29 is sent to the material supply device 1 to adjust the material supply amount of the material supply device 1.

Further, the arithmetic and control unit 28 calculates the deviation between the material consumption of the calendar 4 and the amount of material reached at the time t ₁ from when the material consumption of the calendar 4 is changed to when the material supply device 1 starts to change the material supply. and minute Q _1, the material 3 after the material supply volume change material supply apparatus 1 from the start of the change of the quantity of material fed 'calendar 4
The deviations Q ₂ with the material consumption and the material reaches the amount of the transfer time t ₂ calendar 4 to reach determined sums the deviation obtained material supply amount Q _1, Q _2, the calendar 4 The excess or deficiency of the material supply amount of the material supply device 1 after the change of the material consumption amount is determined,
Further, a knife width for correcting the excess or deficiency of the material supply amount.
13 is obtained, and a knife width adjustment signal 29 in which the excess or deficiency is corrected is sent to the material supply device 1.

By doing so, the fluctuation of the bank amount of the calendar 4 before and after the change of the molding speed 24 is reduced, and even when the molding speed 24 is changed, the uniform production of the sheet material 6 'can be performed.

 The above is described with reference to the time chart of FIG.

The arithmetic and control unit 28 is a ipecac a forming speed 24 sent from the forming speed detector 18 at predetermined time intervals T _1, monitors the molding rate 24 calendar 4, and the swing conveyor 2 is swung time equal quantity of material fed per control time T ₂ to,
The material supply amount of the material supply device 1 is controlled.

Initially, the molding speed 24 of the calendar 4 is V ₁ , the material consumption of the calendar 4 at this time is W ₁ , the material supply amount of the material supply device 1 is W ₁ ′ (W ₁ = W ₁ ′), and the material supply device 1 bank 4 of fed material 3 is conveyed to the swing conveyor 2 calendar 4 'W ₁ "of material reaching the amount of time that reaches the (W _1' =
W ₁ ″), if the molding speed 24 of the calendar 4 starts to change at the point A and becomes V _{2 at the} point B, the material consumption of the calendar 4
W ₁ starts to change at the point A as in the molding speed 24, and becomes W _{2 at the} point B.

On the other hand, the arithmetic and control unit 28 determines that the forming speed 24 at point A changes, forming speed 24 point C is a forming speed detection value acquisition time after the point B is determined that a V ₂ .

Then, the arithmetic and control unit 28 sends the knife width adjustment signal to the material supply device 1 at the point D which is the material supply amount control time after the point C.
Send 29 to change the material supply as follows. That is, the material consumption W ₂ of the changed forming speed, deviations of the material consumption during the deviations Q ₁ and time t ₂ of the material consumption during the time t ₁
The material supply amount W ₃ ′ corrected by Q ₂ is used.

Thereafter, at point F, the arithmetic and control unit 28 sends a knife width adjustment signal 29 to the material supply device 1 to return the material supply amount to W ₂ ′, which is equal to the changed material consumption amount W ₂ .

Finally, a method of obtaining the material supply amounts W ₁ ′, W ₂ ′, and W ₃ ′ will be described.

First, assuming that the material consumption W of the calendar 4 is S, the sheet width of the obtained sheet material 6 'is S, the sheet thickness is H, the forming speed of the sheet material 6' is V, and the specific gravity of the sheet material 6 'is γ. It is obtained by the equation (1).

W = S · H · V · γ (1) The material supply amount W ′ of the material supply device 1 is the knife width 13
Is N, the gap between the kneading rolls 8, 8 'is G, and the roll speed of the kneading rolls 8 is V'.

W ′ = NGGV′γ (2) When the material consumption W in the calendar 4 and the material supply W ′ in the material supply device 1 are equal, the bank amount of the calendar 4 is constant. Therefore, the condition for keeping the bank amount constant is W = W ', that is, equation (3).

S · H · V · γ = NG · V ′ · γ (3) Here, the material supply amount W ′ in the material supply device 1 is:
Since the set values, ie, the gap G between the kneading rolls 8 and 8 ′ and the roll speed V ′ of the kneading rolls 8, are constant unless they are changed, they are changed by the knife width N. To summarize, Is obtained.

Here, sheet width S, sheet thickness H, kneading rolls 8, 8 '
Since the gap G between the rolls and the material speed V 'are set values and constant. Is represented by a constant k, N = k · V (5)

Therefore, the knife width N ₁ when the material supply amount of W ₁ 'is
(5) of the right side of the V by substituting _{V 1 N 1 = k · V} 1 ... (6) , and the knife width N ₂ when the material supply amount W ₂ '(5)
By substituting V ₂ for V on the right side of the equation, N ₂ = k · V ₂ (7)

Also, knife width N ₃ when the quantity of material fed is W ₃ 'is as follows.

The knife width N _Q1 for correcting the deviation Q ₁ of the total material supply amount from the point A to the point D is approximately the average forming speed from the point A to the point D. Then, the velocity difference is given to V on the right side of equation (5). And to allocate the right side proportionally to the control time T ₂ of the material supply amount, Multiply Further, the knife width N _Q2 for correcting the deviation Q ₂ of the material supply amount from the point D to the point E is obtained by substituting the speed difference V ₂ −V ₁ into V on the right side of the equation (5), and to prorating right within the control time T ₂ of the quantity of material fed Multiply Becomes

Therefore, the knife width N ₃ seeking is determined as the N ₂ to N of the sum of N _Q1 and _{N Q2 3 = N 2 + N} Q1 + N Q2 ... (10).

F point subsequent to the knife width 13 and N _2.

Although the case where the molding speed 24 of the calendar 4 is increased has been described above, the case where the molding speed 24 is decreased is the same as above.

Further, the material supply amount control time T ₂ are in the above description than the predetermined time T ₁ according to the detection, has been described sufficiently long, the material supply amount control time T ₂ is sufficiently short, according to the detected predetermined time T Control with a cycle close to ₁ is also possible.

In the above description, the method of cutting out the material 3 ′ from the kneading rolls 8 and 8 ′ and supplying the material 3 ′ to the calendar 4 has been described. However, an extruder method of directly supplying the material from the extruder 32 to the swing conveyor 2 is adopted. It is possible.

It should be noted that the calendar material supply amount control device of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the spirit of the present invention.

[Effects of the Invention] As described above, according to the calendar material supply amount control device of the present invention, the following various excellent effects can be obtained.

When the material consumption of the calendar changes by changing the molding speed of the calendar, the material supply amount from the material supply device to the calendar is changed to an amount equal to the material consumption of the calendar after the molding speed is changed, and Only during the material supply amount control time, a deviation amount of the material consumption of the calendar from the material arrival amount between the time when the change of the molding speed of the calendar is started and the time when the material supply device changes the material supply amount, and
The material supply amount is determined by a deviation amount of the material consumption amount in the calendar from the material supply amount start changing the material supply amount until the material after the material supply amount change reaches the calendar with respect to the material arrival amount. Since the correction is made, the change in the bank amount of the calendar before and after the change in the molding speed of the calendar can be kept small, and a more uniform sheet material can be manufactured.

[Brief description of the drawings]

FIG. 1 is a schematic general view of one embodiment of the present invention, FIG. 2 is a time chart of control of a material supply amount in one embodiment of the present invention, FIG. 3 is a schematic general view of a conventional example, and FIG. FIG. 4 is a plan view of the material supply device in FIG. 3. In the figure, 1 is a material supply device, 3 and 3 'are materials, 4 is a calendar, 4'
Is the bank, 6, 6 'is the sheet material, 16 is the sheet width detector, 17 is the sheet thickness detector, 18 is the forming speed detector, 22 is the sheet width, 23 is the sheet thickness, 24 is the forming speed, 28 , A knife width adjustment signal as a signal sent from the arithmetic and control unit 28 to the material supply device 1, 37 a bank sensor, 38 a bank amount signal, V ₁ and V ₂ a molding speed of the calendar 4, W ₁ , W ₂ is the amount of material consumed by the calendar 4, W ₁ ′, W ₂ ′ is the amount of material supplied by the material supply device 1, W ₁ ″, W ₂ ″ is the amount of material reached by the calendar 4, t ₁
Deviations of the material consumption and the material reaches the amount during the time from being changed molding rate to change quantity of material fed is started, Q ₁ is the time t ₁ is, t ₂ Changing the quantity of material fed Time from the start of the process until the material reaches the calendar, Q ₂ is the time
deviations of the material consumption and the material reaches the amount of between t _2, T ₂ represents a material supply amount control time.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B29C 43/22-43/24 B29C 43/32-43/34 B29C 43/58

Claims (1)

(57) [Claims] 1. A material supply amount of a calendar comprising a bank sensor for detecting a bank amount of a calendar, and an arithmetic and control unit for sending a signal for changing a material supply amount to a material supply device based on the bank amount from the bank sensor. In the control device, a forming speed detector for detecting a forming speed of the calendar, a sheet width detector and a sheet thickness detector for detecting a sheet width and a sheet thickness of the sheet material formed by the calendar, a forming speed and a sheet When the molding speed of the calendar is changed by inputting the sheet thickness in the same width as the width, the material of the calendar is the time from when the molding speed of the calendar is changed to when the material supply device starts to change the material supply amount. The amount of deviation between the consumed amount and the material arrival amount, and the calender of the time from when the material supply device starts changing the material supply amount until the material after the material supply amount change reaches the calendar. Material supply amount control device of the calendar being characterized in that a calculation control unit which sends a signal to correct the quantity of material fed to the material supply device according to a deviation amount of the material consumption and the material reaches the amount of.