KR20110131762A

KR20110131762A - Control method for automatic splicing of the unwinder

Info

Publication number: KR20110131762A
Application number: KR1020100051361A
Authority: KR
Inventors: 안정진; 최인혁
Original assignee: 주식회사 뉴콘트롤텍
Priority date: 2010-05-31
Filing date: 2010-05-31
Publication date: 2011-12-07

Abstract

PURPOSE: A method for controlling the automatic splicing of an unwinder is provided to minimize the defective rate of products by adjusting a tail length regardless of the speed of production. CONSTITUTION: A method for controlling the automatic splicing of an unwinder is as follows. The position of a material contact part located at the starting point of a waiting material is sensed(150). The operation of a material contact roll is controlled to press a working material on the waiting material depending on the sensed signal(160). The operation of a cutting knife is controlled to cut the working material in consideration of pre-set production speed, the diameter of the waiting material, the position constant of material contact part, a set tail length, and the actual reaction time of the cutting knife(170).

Description

Control Method for Automatic Splicing of the Unwinder}

The present invention relates to an unwinder splicing technology, and more particularly, by cutting the fabric of the work roll after adhering the fabric of the work roll to the fabric of the work roll without stopping the machine in the unwinder providing the fabric. In the replacement splicing operation, a new unwinder automatic splicing control method which controls the gluing / cutting operation so that the user can set the desired tail length according to the production speed.

In general, the construction of a machine for processing a fabric such as film, paper, thin metal, or the like in the form of a web or sheet includes an unwinder, a processing apparatus, and a rewinder. Unwinder refers to a device that unwinds a roll-shaped fabric and supplies it to a processing device. Rewinder refers to a device that rewinds the fabric processed in the processing device to a roll shape. The processing apparatus may be, for example, a coater for coating such as an LCD polarizing film, a sintering film, or the like, a printer for performing a bag or magazine or electronic printing, or a printed or coated like this. And laminators for laminating films and the like.

However, in order to improve the productivity of the processing apparatus, a splicing operation of connecting the work fabric and the standby fabric without stopping or decelerating the machine is required. In order to meet this necessity, conventionally, for example, the registered publication of Korean Patent Registration No. 10-0403421 "Unwinder splicing apparatus of gravure printing machine", by adhering the fabric of the atmospheric roll to the fabric of the working roll, A splicing device has been proposed that cuts the fabric of the work roll immediately after the fabric is released together with the fabric of the work roll. According to this conventional splicing device, the advantage is that the fabric can be automatically replaced without interruption of the gravure printing machine, which is a processing device. However, at this time, after the fabric of the atmospheric roll is bonded to the fabric of the work roll, the fabric of the atmospheric roll and the fabric of the work roll are supplied to the processing apparatus until the fabric of the work roll is cut. The work roll fabric in the superimposed state is called a "tail", but the faster the production speed of the processing apparatus, there is a problem that the length of the tail is increased very much.

In other words, as mentioned in, for example, the registration of Korean Patent Registration No. 10-0412323, "Unwinder Splicing Adjustment Device of Gravure Printing Machine," it takes about 2 seconds to cut after bonding (lamination). That is, when the print speed is 160 ~ 200 mpm (meter per min (m / min)), the tail length can occur up to about 5 ~ 7 m. This long tail length affects the rolls and processing parts of the processing equipment, which can shorten the life of the machine and also cause it to flutter as it progresses, thus adversely affecting precision machining operations. Some parts after the tail are not valuable as products. You lose.

Therefore, in order to shorten this tail length, the domestic patent registration No. 10-0412323, from the proximity sensor for detecting the position of the fabric adhesive portion during the rotation of the atmospheric roll after the fabric of the atmospheric roll is bonded to the fabric of the work roll It is proposed a control device for generating a signal for cutting the work roll fabric in accordance with the detection signal. According to this technique, the control unit cuts the process fabric by operating the cutting means at the same time that the process fabric (working fabric) and the standby fabric are laminated (actually after a certain delay time according to the response time of the cutting device). Could be greatly shortened.

However, if the tail length is too short, the old and new fabrics that are replaced do not stick together, which is also a factor that causes the machine to be forcibly stopped, which is a disadvantage. Thus, there is still a problem of leaving tails of appropriate length that are neither too long nor too short.

Furthermore, according to the device cutting "after a certain time unconditionally" after bonding the old and new fabrics, there was a problem that the tail length is changed according to the production speed. For example, when the production speed is 50 mpm based on 0.1 second, the tail length is about 80 mm. However, when the production speed is 300 mpm, the tail length is 500 mm or more. Even if the production speed is the same, the appropriate tail length is different depending on the material of the fabric, such as film, paper, or thin metal, for example, each case has a limit that it is difficult to leave the optimum tail length.

Therefore, in the splicing operation of attaching the fabric of the atmospheric roll to the fabric of the work roll without interruption of the machine and then cutting the fabric of the work roll, the splicing / cutting can be set to the desired tail length according to the production speed. There is an urgent need for techniques to control operation.

The present invention is to improve the conventional unwinder splicing control technique described above and to provide additional advantages, in particular, in the unwinder after adhering the fabric of the atmospheric roll to the fabric of the working roll without stopping the machine. In the splicing operation to replace by cutting the fabric, the object of the present invention is to provide a new unwinder automatic splicing control method for controlling the bonding / cutting operation so that the user can set the desired tail length according to the production speed.

In addition to the production speed and the desired tail length, the object of the present invention is to compensate the reaction speed of the control unit consisting of a circuit such as (PLC, programmable logic controller) and the response speed of the actual machine in response to the electrical signal from the control unit with a constant The new unwinder automatic splicing control method allows the user to set the desired tail length at any time, regardless of fabric or machine type, by calculating the time at which the cutting device starts to operate.

This object is achieved by an unwinder automatic splicing control method provided according to the present invention.

Unwinder automatic splicing control method provided in accordance with an aspect of the present invention, in the unwinder for providing the fabric, the work roll of the standby roll of the waiting roll to rotate in synchronization with the rotation of the work roll without interruption of the machine; In the unwinder automatic splicing control method for cutting the work fabric of the work roll after the bonding point after bonding to the work fabric, the sensing step of detecting the position of the fabric adhesive located at the starting point of the standby fabric Wow; Controlling the operation of the fabric bonding roll to press the working fabric onto the atmospheric fabric according to the sensing signal in the sensing step; From the time point of receiving the detection signal in the sensing step, the predetermined production speed (S), the diameter of the standby fabric (D), the position constant of the fabric adhesive (P), the tail length (Tail), the control circuit response time (scanT And a delay time calculated in consideration of the actual reaction time (KnifeT) of the cutting knife, and controlling the operation of the cutting knife to cut the work fabric.

In one embodiment, the delay time is the predetermined production speed (S), the diameter (D) of the standby fabric (8), the distal end position constant (P), the set tail length (Tail), the control unit In consideration of the circuit reaction time (scanT) and the actual reaction time (KnifeT) of the cutting knife,

delayT = idealdelayT- (scanT + knifeT)

{Here, idealdelayT is an ideal cutting knife operation delay time without considering the machine response time, which is calculated by idealdelayT = Tt + Tail / (S * 1000/60); Tt is the time taken for the fabric bonding portion to progress between the fabric bonding roll and the fabric bonding portion when the fabric bonding roll presses the atmospheric fabric, and is calculated by Tt = (D * π * P) / (S * 1000/60). do. The unit is time in sec, distance in mm and speed in mpm}.

In another embodiment, the distal end portion constant P is preferably a value between 1/2 and 1.

As described above, the present invention can continue the work without stopping or slowing down the machine in order to attach the fabric, thereby increasing productivity, and improving the hassle when replacing the work fabric from the work fabric.

And the tail length can be adjusted irrespective of the production speed, so the defect rate of the product can be minimized.

Furthermore, various desired tail lengths can be applied depending on the material of the fabric (resin film, paper, metal, etc.), thereby providing a remarkable effect of producing an optimal product.

1 is a schematic view for explaining the overall operation of the unwinder automatic splicing control method according to an embodiment of the present invention.
2 to 8 are schematic diagrams showing each step shown in FIG. 1 in more detail.
9 is a schematic time chart showing the length of time and the sequence required for each step of the unwinder automatic splicing control method according to an embodiment of the present invention.
10 is a schematic flowchart showing each step of the unwinder automatic splicing control method according to an embodiment of the present invention.
FIG. 11 is a schematic block diagram illustrating a controller operation of a splicing apparatus for executing an unwinder automatic splicing control method according to an embodiment of the present invention. FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings in which: FIG.

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

Unwinder automatic splicing control method provided in accordance with an aspect of the present invention, as shown in Figure 1 as a whole, respectively as shown in detail in Figures 2 to 8, the machine in the unwinder for providing the fabric After adhering the atmospheric fabric 8 of the atmospheric roll 7 rotating in synchronization with the rotation of the work roll 2 to the work fabric 3 of the work roll 2 without interruption of the work roll 2, It relates to an unwinder automatic splicing control method for cutting the work fabric (3).

1 to 8, the method according to the present invention may be applied to a splicing apparatus 10 having a configuration as shown in FIGS. 1A and 2. This splicing device 10 has a pair of turrets 4 rotatable about a rotation axis 5 rotatably supported on a support frame 1. Between the pair of turrets 4, the work roll 2, the atmospheric roll 7 and the guide roll 6 are rotatably arranged. The work fabric 3 is released from the work roll 2 and supplied to a subsequent machining process. The speed with which the work fabric 3 is released from the work roll 2 is the production speed in the machining process. The work roll 2 was initially sized to have the same diameter as the atmospheric roll 7 but the diameter of the work roll 2 became smaller as the work progressed. On the other hand, the atmospheric roll (8) is wound around the atmospheric roll (7), the diameter of the atmospheric roll (7) or the diameter of the atmospheric fabric (8) is known in advance, and at the point where the atmospheric fabric (8) begins to unwind, 9) is formed. The fabric adhesive 9 is then bonded to the work fabric 3 being released from the work roll 2, whereby the air fabric 8 can be introduced into the machining process.

Although not shown in FIGS. 1A and 2, as described in detail below, the splicing apparatus 10 further includes a cutting device 40, a controller 50, and the like.

For example, when the operator starts the splicing operation by pressing the start button or the like, as shown in FIGS. 1B and 3C and FIGS. 3 and 4, the turret 4 is centered on the rotary shaft 5. It starts to rotate with respect to the support frame 1, and continues to rotate until the waiting roll 7 is moved to the position where the work roll 2 was located (step 110 of FIG. 10). This rotational operation can be interrupted and completed by, for example, sensing the rotation of the turret 4 or the horizontal position of the work roll 2 and the standby roll 7 by a sensor (not shown) (step 120 of FIG. 10). }. The rotation of the turret 4 is made so that the speed at which the work fabric 3 is released, that is, the production speed is not lowered.

Thus, after the atmospheric roll 7 is moved to the position for replacement, as shown in Fig. 1 (d) and 5, the cutting device 40 is controlled to the control unit 50 (see Fig. 11). It is moved to the working position by the drive of the cutting device drive part 45 (refer FIG. 11) by this (step 130 of FIG. 10). The cutting device 40 includes a fabric bonding roll 20 and a cutting knife 30, and includes an arm or a carrier equipped with driving devices such as a cylinder for their operation. Simultaneously with the movement of the cutting device 40, the atmospheric roll 7 rotates in synchronization with the rotational speed of the work roll 2 to have the same production speed (step 140 in FIG. 10).

Then, in order to start a cutting operation, for example, by pressing a cutting operation start button or applying a signal, the far-end adhesive position detecting sensor 60 (see FIG. 11), which may be, for example, a proximity sensor, is a starting point of the standby fabric 8. Detect the position of the far-end adhesive part 9 located in and transmits it to the control unit 50. {Step 150 of FIG. 10}.

Then, as shown in (e) and 6 of FIG. 1, the original fabric roll 20 is the work fabric (3) by the control unit 50 for controlling the original fabric roll driving unit 25 to the standby fabric (8) It acts to press on the surface i.e. the surface of the atmospheric roll 7 (step 160 of FIG. 10).

At the same time, the control unit 50 is a predetermined production speed (S), the diameter (D) of the standby fabric (8), the position constant of the distal end (P), the tail length (Tail), the control circuit reaction time (scanT), and The delay time is calculated by considering the actual knifeT of the cutting knife. And the controller 50 is intuitively shown in Figure 9, after the calculated delayT elapses from the time when the detection signal from the sensor 60 in the sensing step 150, Figure 1 As shown in (f) and FIG. 7, the cutting knife driving unit 35 for the operation of the cutting knife 30 is controlled to cut the work fabric 3 (step 170 of FIG. 10).

After the cutting knife 30 performs the cutting operation, the rotation of the work roll 2 is stopped (step 180 of FIG. 10), and the cutting device including the cutting knife 30 and the fabric adhesive roll 20. 40, the whole is returned to the original position (step 190 of FIG. 10).

7 and 8 from the position where the work fabric 3 and the air fabric 8 overlap each other, that is, the position where the two fabrics are bonded to each other by the bonding portion 9, the work fabric 3 by the cutting knife 30 The part up to the cut off part is shown. The length of the portion where these two fabrics overlap is determined by the tail length of the work fabric 3. According to the invention, this tail length can always be cut to a precisely set length, regardless of the production speed. To this end, the operation of the cutting knife 30 is controlled based on the delay time calculated by the controller 50.

The controller 50 calculates the production speed S, the diameter D of the atmospheric fabric 8, the position constant P of the distal end portion P, the set tail length, and the control circuit in order to calculate the delay time delayT. The reaction time (scanT) and the actual reaction time (KnifeT) of the cutting knife are used as parameters. These data are input in advance by the user and stored on the memory 55, and the memory 55 also stores equations for calculating a delayT, that is, equations 1 to 3 as well.

The delay time delayT is calculated by Equation 1 below. Here, idealdelayT is an ideal cutting knife operation delay time without considering the machine response time, and is calculated by Equation 2 below. Tt is the time taken for the fabric bonding portion to progress between the fabric bonding roll and the fabric bonding portion at the time when the fabric bonding roll presses the air fabric, and is calculated by Equation 3 below. In Equation 1 to 3, the unit of each parameter is a time sec, a distance mm, and a speed mpm.

In the calculation of the delay time according to the present invention, the fabric bonding portion 9 passes through the position of the fabric bonding roll 20 that presses the fabric fabric 30 on the air fabric 8. Tail / (S * 1000/60) to leave the desired tail length (mm) in accordance with the production speed (S) (mpm) at the point of time when the atmospheric fabric 8 is bonded, i.e., after Tt (sec). ) Is considered. Accordingly, according to the present invention can be provided an advantage that the desired tail length can be obtained regardless of the production speed.

Furthermore, in calculating the delay time, we consider the response time scanT of the electronic circuit part of the control unit, and the time knifeT in which the cutting knife reacts, among the response time of the mechanical device. The response time scanT of the electronic circuit part may use a scan time which can be checked in the PLC programming tool, for example, when the control unit is made of a PLC.

The time knifeT responds to the cutting knife is generally not immediately cut even when a control signal is given to the cutting knife, but is cut after being delayed by a mechanical response time of, for example, 10 ms to 200 ms. Therefore, if this delay due to mechanical reaction is not taken into account, the desired tail length cannot be left exactly. In the control method according to the present invention, since such a mechanical reaction is also reflected, an advantage can be provided that the tail of the precise length can be cut without an error due to the delay of the mechanical reaction time. Mechanical reaction time may vary depending on the approach of the cutting device and the distance between the cutting knives and the fabric.

As such, after the cutting operation is started, according to the present invention, the position of the fabric bonding part 9 is sensed. The fabric bonding portion 9 is rotated in accordance with the rotation of the atmospheric roll (7) while passing through the position of the fabric bonding roll 20 is pressing the fabric, the fabric is bonded, the atmospheric fabric 8 is the work fabric (3) It is glued to it and starts to be released. And the cutting knife 30 is operated according to the delay time (delayT) as described above to cut the work fabric (3). Accordingly, the work fabric 3 can be replaced by the standby fabric 8 while the tail length Tail is set.

According to an embodiment of the present invention, the distal end position constant (P) preferably has a value between 0 and 1, more preferably between 1/2 and 1. Here, a value of 1 means that the atmospheric roll 7 rotates one full revolution until the fabric bonding portion 9 reaches the position of the fabric bonding roll 20, and a value of 1/2 means a case in which only one half of the fabric is rotated. do. In the example shown in FIG. 6, the far-end adhesive part 9 must turn 3/4 turns, in this case the far-end adhesive position constant P is 3/4. When this position constant value is larger than 1, not only the cutting operation time is delayed too much but also the tail length becomes too large than the set value. In addition, if the position constant value is too small, there is a high possibility that the margin is too large in consideration of the mechanical reaction time. Since the position constant P depends on the position where the cutting device 40 approaches the atmospheric roll 7 or the position where the fabric sticking roll 20 presses the atmospheric roll 7, the position constant depends on the machine configuration. The value of can vary, but on certain machines it is a constant value.

Although the invention has been described in detail only with respect to the specific examples described, it will be apparent to those skilled in the art that various modifications and variations can be made within the spirit of the invention, and such modifications and variations belong to the appended claims.

10 splicing device 1: support frame
2: work roll 3: work fabric
4: turret 5: turret rotation axis
6: guide roller 7: waiting roll
8: atmospheric fabric 9: fabric adhesive
20: fabric adhesive roll 25: fabric adhesive roll drive unit
30: cutting knife 35: cutting knife driving unit
40: cutting device 45: cutting device drive unit
50: control unit 55: memory
60: fabric adhesive position detection sensor

Claims

In the unwinder providing the fabric, the air fabric 8 of the air roll 7, which rotates in synchronization with the rotation of the work roll 2 without stopping the machine, is adhered to the work fabric 3 of the work roll 2 In the unwinder automatic splicing control method for cutting the work fabric 3 of the work roll 2 after the bonding point,
A sensing step 150 of detecting a position of the far-end bonding part 9 located at the start point of the atmospheric fabric 8;
Controlling (160) the operation of the fabric sticking roll to press the working fabric (3) onto the atmospheric fabric (8) according to the sensing signal in the sensing step (150);
From the time point of receiving the detection signal in the detection step 150, the preset production speed (S), the diameter (D) of the air fabric (8), the fabric adhesive position constant (P), the set tail length (Tail), After the delay time calculated in consideration of the control circuit reaction time (scanT) and the actual reaction time (KnifeT) of the cutting knife, controlling the operation of the cutting knife to cut the work fabric 170
Unwinder automatic splicing control method comprising a.

The method according to claim 1, wherein the delay time delayT is the predetermined production speed S, the diameter D of the atmospheric fabric 8, the distal end position constant P, the set tail length Tail, and the control circuit. Considering the reaction time (scanT) and the actual reaction time (KnifeT) of the cutting knife, the following equation
delayT = idealdelayT- (scanT + knifeT)
{Here, idealdelayT is an ideal cutting knife operation delay time without considering the machine response time, which is calculated by idealdelayT = Tt + Tail / (S * 1000/60); Tt is the time taken for the fabric bonding portion to progress between the fabric bonding roll and the fabric bonding portion when the fabric bonding roll presses the atmospheric fabric, and is calculated by Tt = (D * π * P) / (S * 1000/60). do. The unit is time in seconds, the distance in mm and the speed in mpm.}
Unwinder automatic splicing control method, characterized in that calculated according to.

The method of claim 1, wherein the distal adhesion portion position constant (P) is a value between 1/2 and 1 unwinder automatic splicing control method.