JP2019104616A - Web processing apparatus and method of manufacturing web processing product - Google Patents

Abstract

To provide a web processing apparatus configured to optimize expander roll installation conditions, and capable of improving web slack and wrinkles before processing, and as a result, improving an appearance defect generated during processing.SOLUTION: There is provided a web processing apparatus in which a first guide roll 1, an expander roll 2, a second guide roll 3, and a processing unit are arranged in this order from an upstream side on a web transport route. A distance between an axis of the first guide roll and an axis of the expander roll is 300 mm or more, and a distance between the axis of the expander roll and an axis of the second guide roll is 300 mm or less.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a web processing apparatus for applying a coating solution to a web-like article conveyed by a plurality of rollers, and a method of producing a web article using the same.

  Generally, a long sheet having flexibility such as plastic film, paper, metal foil, etc. wound in a roll is unrolled and wound into a roll, and then wound and wound up to a roll. There is known a web processing apparatus that performs processing such as coating, chemical processing, and slitting in between. Usually, a flexible long sheet such as the plastic film, paper, metal foil or the like is called a web.

  In the web processing apparatus, various functions are added in various places to correspond to various web types, their thickness and width. Manufacturing is possible without changing the equipment conditions if the properties of the input web are exactly the same or within the tolerance that the equipment can cope with, but if the web exceeding the equipment tolerance is flowed, manufacture The conditions need to be reviewed (adjusted) each time.

  Factors that exceed the device tolerance include, for example, web width, web thickness, web slack, web web displacement, web break strength, etc. beyond the device specifications, but in particular, slack before processing and wrinkles The occurrence is fatal, and if processing is performed with slackness or wrinkles, serious appearance defects (coating loss etc.) will occur, so adjust the transport tension and guide roll (conveyance roll) before processing and slacken. It is necessary to be in a state where there are no wrinkles.

  As a method of improving slack and wrinkles before processing of the web, there is a method of installing an expander roll in the transport path (for example, Patent Documents 1 and 2). FIG. 7A shows a structural example of the expander roll in a partially broken plan view. The expander roll has a structure in which a cylindrical roll having a built-in bearing and covered with an exterior member is disposed on a curved support shaft, and the cylindrical roll in contact with the web is curved around the stationary support shaft. It has the function of removing slack and wrinkles by rotating it.

  FIG.7 (b) is the figure which looked at Fig.7 (a) from the back side, and is a top view for demonstrating the aspect by which a web is spread in the width direction by an expander roll. Since the expander roll transports the web in a direction perpendicular to the curved center line C2, the transport direction coincides with the web flow direction on the center line C1, but as it moves outward from the center line C1, the arrow As shown, lean more outward. Therefore, the web is pushed and spread (widening effect) on both sides in the width direction with the center line C1 as a boundary, and slack and wrinkles are improved.

  However, since the expander roll is curved, the traveling distance is different between the central portion and the end portion of the web, so that the web is easily flapped at the end portion, and there is a problem that the web may meander. Therefore, slack and wrinkles can not be removed unless the installation conditions such as the direction of the curved portion are adjusted well, which may cause further deterioration. That is, it is difficult to grasp the setting of conditions, and there is a problem in the stability and reproducibility of sagging and wrinkle removal.

  Before processing, it is necessary to check how much slack and wrinkles are present before processing in order to make them free of wrinkles and to make improvements, if necessary, and some proposals have been made. (For example, Patent Documents 3 and 4).

However, the method disclosed in Patent Document 3 is a method of evaluating the flatness by placing the web in a slack, wrinkled, and bent state on a flat plate installed horizontally, and for measurement, the roll to web is measured. It is necessary to sample some. Therefore, there is a problem such as web loss. In addition, if the web roll itself is a product, there is a problem that 100% inspection is difficult.

  In the method disclosed in Patent Document 4, the outer diameter of the roll on which the web is wound is measured, and the difference from the average value is calculated as the amount of displacement, and then the maximum amount of displacement is the maximum amount of slack (or the amount of wrinkles; The presence or absence of slack is appropriately extracted and described as a representative example, and whether the slack of the web is acceptable or not is determined by comparing a preset reference value with the maximum displacement amount. It can not be judged if it is slack.

  After all, under the present circumstances, it is necessary to adjust the conveyance tension which is one of the manufacturing conditions while conveying web slack and wrinkles with the device and visually confirming it, and it is easy to show individual error by the measurer during measurement The problem remains that the eye can not keep up and the measurement speed is limited.

Unexamined-Japanese-Patent No. 6-107361 JP 2012-153436 A JP-A-7-27561 JP, 2010-185763, A

  The present invention solves the problems of the prior art as described above, and the purpose thereof is to optimize the installation conditions of the expander roll, to improve the slack and wrinkles of the web before processing, and As a result, there is provided a web processing apparatus in which appearance defects generated during processing are improved, more preferably, a web processing apparatus provided with a slack shape measurement mechanism for quantifying web slack, and a web product using them It is in providing a manufacturing method.

In order to solve the above-described problems, the invention according to claim 1 is a web processing in which a first guide roll, an expander roll, a second guide roll, and a processing unit are arranged in order from the upstream side in the web transport path. A device,
A web processing apparatus, wherein a distance between axes of the first guide roll and the expander roll is 300 mm or more, and a distance between axes of the expander roll and the second guide roll is 300 mm or less. It is

In the invention according to claim 2, the web is conveyed while being partially held by the second guide roll.
In a part of the area where the web is held by the second guide roll, the web and the light receiver of the laser displacement meter pass in parallel with the width direction of the second guide roll and in the optical path of the laser light Placed in
The web processing apparatus according to claim 1, further comprising: a mechanism configured to measure the shape of the slack of the web according to a light shielding shape of the partially shielded laser light received by the light receiver. It is a thing.

In the invention according to claim 3, the web is conveyed by being partially held by the expander roll,
The web processing apparatus according to claim 1 or 2, wherein a holding angle when the web is partially held by the expander roll is 90 ° or less.

  The invention according to claim 4 has a function of changing the transport speed when the measured value by the mechanism for measuring the shape of the slack of the amount of slack defined from the shape of the slack exceeds a prescribed allowable value. It is set as the web processing apparatus of Claim 2 or 3 characterized by the above-mentioned.

  The invention according to a fifth aspect is a method for producing a processed web, characterized by using the web processing apparatus according to any one of the first to fourth aspects.

  According to the present invention, since the setting conditions of the expander roll are optimized, slack of the web before processing and wrinkles are improved, and as a result, it is possible to obtain a web processing apparatus which improves appearance defects generated during processing. More preferably, since the slack of the web is quantified by the slack shape measuring mechanism, web processing devices capable of reducing adjustment of human manufacturing conditions and reducing loss and workload, and web using them A method of producing a workpiece is obtained.

(A) The schematic front view which shows the main structures of 1st Embodiment of the web processing apparatus of this invention, The schematic front view which partially expanded the A section of (b) and (a). The schematic front view which shows the main structures of 2nd Embodiment of the web processing apparatus of this invention. The schematic side view which shows the installation mode of the laser displacement meter to the roll for slack measurement based on 2nd Embodiment of the web processing apparatus of this invention, and the mode at the time of measurement. The schematic front view which expands and shows the aspect at the time of the measurement in FIG. 3 partially. The schematic front view which shows the main structures of 3rd Embodiment of the web processing apparatus of this invention. The top view for demonstrating the measurement location of the slack before coating in an Example. (A) The partially broken top view which illustrates the structure of an expander roll, (b) The top view for demonstrating the aspect which a web is expanded in the width direction by an expander roll.

  Hereinafter, a web processing apparatus and a method of manufacturing a web processing product according to an embodiment of the present invention will be described using the drawings. The same reference numerals are given to the same components unless there is a reason for convenience. In the drawings, the thickness and proportions of components may be exaggerated for ease of view, and the number of components may be reduced and illustrated. Further, the present invention is not limited to the following embodiments without departing from the scope of the invention.

  The web processing apparatus according to the present invention includes the first embodiment, the second embodiment, and the third embodiment as described later, but the configuration and function of the first embodiment are the second embodiment. It also has a form and a third embodiment. The configuration and functions of the second embodiment also have the third embodiment.

  Fig.1 (a) is a schematic front view which shows the main structures of 1st Embodiment of the web processing apparatus of this invention, The same (b) is the schematic front view which expanded the A section of (a) partially. The web processing apparatus of the first embodiment is disposed in the order of the first guide roll 1, the expander roll 2, the second guide roll 3, and the processing unit from the upstream side in the web conveyance path. Although the figure shows up to the fourth guide roll 6, the third and subsequent guide rolls may or may not be any plural as needed.

The web processing apparatus according to the first embodiment, as shown in FIG. 1 (b), the distance L ₁ between the axes of the first guide roll 2 and the expander roll 2 is at least 300 mm, expander roll 2 and the second distance _{L 2} between the axes of the guide rolls 3 is less than 300 mm. The effectiveness of these distance definitions is shown in the examples.

  In the web processing apparatus according to the first embodiment, as shown in FIG. 1B, it is preferable that the holding angle (θ) when the web is partially held by the expander roll 2 is 90 ° or less. If the holding angle (θ) is larger than 90 °, the contact area between the web and the expander roll 2 becomes too large, and the frictional force becomes excessive to cause the web to be damaged.

  FIG. 2 is a schematic front view showing the main configuration of a second embodiment of the web processing apparatus of the present invention. In the second embodiment, in addition to the configuration of the first embodiment of FIG. 1 (a), the light projector and the light receiver of the laser displacement meter 4 are provided in a part of the area where the web is held by the second guide roll 3. Prepare. In the following, in the second embodiment, the second guide roll 3 including the light projector and the light receiver of the laser displacement meter 4 is appropriately referred to as a slack measurement roll 3 '.

  FIG. 3 is a schematic side view showing the installation mode of the laser displacement meter on the slack measurement roll and the mode at the time of measurement according to a second embodiment of the web processing apparatus of the present invention. As described above, in a part of the region where the web is held by the slack measurement roll, preferably at substantially the center, the width direction of the slack measurement roll of the light projector and the light receiver of the laser displacement gauge (the direction of the dotted arrow in the figure). The web is disposed so as to pass through the optical path of the laser light in parallel with the above, and constitutes a web slack shape measuring mechanism.

  As shown in FIG. 3, when the web is slackened, the light path of the laser light is blocked by the slack, so that a light shielding portion is generated. Therefore, in the web slack shape measuring mechanism, the laser light which is partially blocked by the slack is received by the light receiver, and the shape of the slack is measured by the light blocking shape.

  FIG. 4 is a schematic front view showing a mode in measurement in FIG. 3 in a partially enlarged manner. The optical path of the laser beam is a measurement area, and the lower limit of the measurement area is set at a position where the web is in contact with a part of the area held by the slack measurement roll, preferably about the center.

  In the web processing apparatus of the second embodiment, it is determined whether or not the measured value by the web slack shape measuring mechanism of the slack amount defined from the shape of the slack is within the separately defined allowable value of the slack amount. The amount of slack defined from the shape of the slack may be, for example, the maximum height of the slack shape shown by H in FIG. 4 or the cross-sectional area of the light shielding portion (slack portion) shown by oblique lines, obtained from the shape of the slack. It may be information of smaller slack and their collection. Depending on the product specification, select one or more parameters of the amount of slack that affect the quality, and experimentally determine and define the tolerance value.

  As the slack shape may increase, the beam diameter of the laser displacement gauge should be larger. As a laser displacement meter used in the present invention, in addition to a two-dimensional laser displacement meter that scans a one-dimensional laser displacement meter that measures at a point, a three-dimensional laser displacement meter that captures a shape by a surface is also commercially available. , Can be suitably used.

  As described above, in the web processing apparatus according to the second embodiment, the web slack shape measurement mechanism is disposed upstream of the processing unit to quantify the slack amount of the web, and therefore, it is possible to manage tendency or isolate when an abnormality occurs ( It can also be used for base paper origin or processing origin).

  FIG. 5 is a schematic front view showing the main configuration of a third embodiment of the web processing apparatus of the present invention. In the third embodiment, in addition to the second embodiment, when the measured value by the web slack shape measuring mechanism of the slack amount defined from the shape of the slack exceeds the separately defined allowable value of the slack amount, the transport speed Has the ability to change.

Specifically, in FIG. 5, the displacement gauge control device is connected to the winding control device, and the slack gauge control device takes up the slack amount from the displacement gauge control device when the measured value of the slack amount exceeds a prescribed allowable value. Output to The winding control device calculates a suitable speed change value from the conversion formula of slack amount and speed change value defined in advance, and outputs the calculated speed change value to the drive inverter control device. The drive inverter control device changes the number of rotations of the transport motors M1 and M2 in communication with the unwinding roll and the processing unit. The web processing apparatus of the third embodiment changes the transport speed by the above series of functions.

  The relationship between the transport speed and the tension of the expander roll will be described. For example, the faster the transport speed, the shorter the contact time between the web and the expander roll. Then, even if the expander roll applies outward tension to the web, the web may pass through the expander roll before the slack is improved. Conversely, if the measured slack value exceeds the specified slack tolerance, reduce the transport speed so that the web has sufficient outward tension as it passes through the expander roll. Can improve the slack shape.

  As described above, in the web processing apparatus according to the third embodiment, when the web exceeds the allowable amount of slack, the conveyance speed is changed by automatic control to correct slack before being carried into the processing unit. Therefore, the stability and reproducibility of wrinkling can be improved, and processing loss can be reduced, even against changes in web conditions and any fluctuations during transport.

  The method for producing a web product of the present invention is a method for producing a web product using the web processing apparatus of the present invention. Examples of the processed web include a coated product coated with a coating solution, a chemical-treated product, a slit processed product, a dry laminate product, and the like. The dry-laminated product is coated with an adhesive as a coating solution on the surface of the plastic film transported from the unwinding roll on which the barrier film and the like are formed, dried, and then transported from the second unwinding roll. The second film and the laminating section are pressure bonded and wound up, and the adhesive is cured and laminated, and is often used for packaging materials such as food and medicine.

  In order to confirm the effectiveness of the web processing apparatus of the present invention, three types of PET (polyethylene terephthalate) films (1), (2) and (3) are prepared as web materials, and first (A) before coating The amount of slack was measured. The measurement of the amount of slack before coating was performed by cutting each sample into an area of 1 m × 1 m, setting the cut out film on a flat bed, and using a digital caliper. The measurement points were eight points indicated by ○ in FIG. 6, and the average value was determined. If the average value is less than 0.10 mm, appearance defects are unlikely to occur, but all three samples in this case were out of tolerance and were used because they are suitable for confirming the effect of the expander roll.

Next, coating was carried out with a liquid containing a binder resin and fine particles in which appearance defects due to slack generally easily occur, and the amount of slack after coating was measured. Coating conditions were made into the following (B) and (C). (B) The web processing apparatus of the structure of 2nd Embodiment of FIG. 2 was used (however, the distance between the axes is the following reference).
(C) In the web processing apparatus of the structure of 2nd Embodiment of FIG. 2, it replaced with the expander roll 2 and used the normal guide roll. In both the conditions (B) and (C), the distance between the axes of the first guide roll 1 and the second guide roll 3 is constant at 600 mm, and the first guide roll 1 and (B) the expander roll 2 or (C) The distance between the axes of the normal guide rolls (the distance between the upstream rolls), and the distance between the axes of the (B) expander roll 2 or (C) normal guide rolls and the axis of the second guide roll 3 (downstream rolls) Coating was performed with various changes in distance). The measurement of the amount of slack after coating measured the maximum height of slack shape with the laser displacement meter with which the second embodiment is provided.

The above experimental conditions, measurement results, and determination results are shown in Table 1 before coating (A), and in Table 2 in the case of coating conditions (B) and (C). In addition, determination was made OK determination when it was the allowance (less than 0.10 mm) of slack amount.

  From Table 1 and Table 2, under condition (B), the expander roll is disposed between the first guide roll and the second guide roll, and the distance between the axes of the first guide roll and the expander roll is 300 mm or more. Only when the web processing apparatus of the first embodiment of the present invention, in which the distance between the expander roll and the axis of the second guide roll is 300 mm or less, the amount of slack is within the allowable value, and the appearance after coating It confirmed that a defect could also be suppressed.

  On the other hand, when using a normal guide roll or using an expander roll, if the distance between the axes of the first guide roll and the expander roll is less than 300 mm, the slack seen at the expander roll entrance, With respect to wrinkles, improvement by the web widening effect by the expander roll was not obtained. Even when the distance between the expander roll and the second guide roll was greater than 300 mm, the effect of removing slack and wrinkles was not obtained.

1 ... 1st guide roll 2 ... ... Expander roll 3 ... 2nd guide roll 3 '... Roll for measuring slack 4 ... ... Laser displacement meter 5 ... 3 Guide roll 6 ··· Fourth guide roll

Claims (5)

A web processing apparatus in which a first guide roll, an expander roll, a second guide roll, and a processing unit are arranged in this order from the upstream side in the web conveyance path,
The distance between the axes of the first guide roll and the expander roll is 300 mm or more, and the distance between the axes of the expander roll and the second guide roll is 300 mm or less. The web is conveyed while being partially held by the second guide roll.
In a part of the area where the web is held by the second guide roll, the web and the light receiver of the laser displacement meter pass in parallel with the width direction of the second guide roll and in the optical path of the laser light Placed in
2. The web processing apparatus according to claim 1, further comprising a mechanism for measuring the shape of the slack of the web according to a light shielding shape of the partially shielded laser light received by the light receiver. The web is conveyed by being partially held by the expander roll,
The web processing apparatus according to claim 1 or 2, wherein a holding angle when the web is partially held by the expander roll is 90 ° or less.   4. The apparatus according to claim 2, further comprising a function of changing the transport speed when the measured value by the mechanism for measuring the shape of the slack of the amount of slack defined from the shape of the slack exceeds a prescribed allowable value. Or the web processing apparatus as described in 3.   A method of producing a processed web, wherein the web processing apparatus according to any one of claims 1 to 4 is used.