JP2009233509A - Foreign matter removing apparatus and foreign matter removing method for sheet-like object - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foreign matter removing apparatus and method, capable of catching the foreign matters stuck to the surface of a traveling sheet-like object in-line without omission without damaging the sheet-like object. <P>SOLUTION: For the foreign matter removing apparatus and method for the sheet-like object, the foreign matter removing apparatus for removing the foreign matters stuck to the surface of the traveling sheet-like object includes an air blowing means for blowing air at the position of passing through on a roll, a hooded suction means installed in the opposite direction of the air blowing means, and a block for guiding air flowing along the surface of the sheet-like object into the hood of the suction means in front of the hood of the suction means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a foreign matter removing apparatus and a foreign matter removing method for collecting foreign matter adhering to the surface of a sheet-like material in-line.

  In recent years, requirements for foreign substances are becoming stricter for optical films used for liquid crystals and the like, and high-performance films used for electronic equipment parts, and the production of these sheet-like materials is performed in a clean room. However, environmentally generated foreign matter generated by the operator's work, etc., and sheet-like chips generated in the slitting process may scatter in the process, and these foreign matters adhere to the sheet-like product. There was a problem of being wound and mixed in the state.

  In order to solve this problem, foreign matter removal is generally performed using an adhesive rubber roll, and it is brought into contact with another adhesive rubber roll having a stronger adhesive force against the decrease in the adhesive force caused by foreign matter laminated on the surface of the adhesive rubber roll. There has been proposed a method for maintaining the foreign substance removal capability (see, for example, Patent Document 1). However, in this method, the adhesive rubber roll that comes into contact with the sheet-like material comes into contact with the stronger adhesive rubber roll, thereby peeling off the components and the like of the adhesive rubber roll itself, and the fragments and components of the adhesive rubber roll are attached to the sheet-like material. There's a problem. Further, the adhesive rubber roll has a problem that fibrous foreign matters and small foreign matters of several tens of microns cannot be completely removed.

In order to remove small foreign matters, a dust removal method (for example, see Patent Document 2) in which foreign matters are lifted and sucked by ultrasonic pressure air in an air knife flow has been proposed. However, there are some foreign substances attached to the sheet-like material whose dimensions are equivalent to the diameter of several tens of microns to over 1 mm. In this case, there are cases where large foreign substances or heavy foreign substances are not removed. There was a problem that the dust removal performance deteriorated as the moving speed increased.
JP 2003-181945 A JP-A-9-52291

  For such a problem, on the upstream side of the winding process of the sheet-like material, compressed air is blown onto the sheet-like material by the air blowing means installed at a certain interval from the sheet-like material, and is arranged in the direction opposite to the air blowing means. In general, a method of removing foreign matter using a collecting suction device or the like is used. Here, the collecting means needs to prevent the generation of wrinkles due to contact with the sheet-like material, and can only approach the sheet-like material to about several centimeters. However, the compressed air blown onto the sheet-like material has high directivity and high flow velocity, so it has the property of flowing along the sheet-like surface due to the Coanda effect, and a part of the air flow is a collection suction device There is a problem that the foreign matter is reattached to the sheet-like material.

  The present invention solves the above-mentioned problems of the prior art, and removes foreign matter adhering to the surface of the sheet-like material stably and efficiently over a long period without damaging the sheet-like material. It is an object to provide a foreign matter removing apparatus and a foreign matter removing method.

  In order to solve the above problems, a sheet-like foreign matter removing apparatus according to the present invention includes an air blowing means for blowing air at a position passing over a roll, and a hooded suction means installed in a direction opposite to the air blowing means. A block for guiding the air flowing along the surface of the sheet-like material into the hood of the suction means is provided in front of the hood of the suction means.

  According to the above configuration, since air is blown at a position where the sheet-like material passes over the roll, it is possible to prevent the sheet-like material from being charged by vibration caused by air and from being broken. Therefore, it is possible to blow stronger air than a free sheet-like material that is not supported, and as a result, it is possible to reliably remove attached dust, for example, and minute foreign matter. Here, it is preferable that the direction in which the air is blown is opposite to the direction in which the sheet-like object moves, in that foreign matter is easily peeled off by air.

  In addition, by installing a suction device with a hood in the opposite direction to the air blowing, the foreign material separated by air is collected by the suction means, so that the foreign material is scattered in the process and reattached to the sheet. Can be suppressed.

  Furthermore, by installing a block using the Coanda effect, for example, in front of the suction means, air flowing along the surface of the sheet-like material due to the Coanda effect can be guided into the hood of the suction means. It is possible to reliably collect. In the present invention, the “block” is not limited as long as it guides the air flowing along the surface of the sheet-like material into the hood of the suction means.

  In the sheet foreign matter removing apparatus according to the present invention, the air blowing means and the suction means are installed on at least one surface with respect to the front surface side or the back surface side of the sheet material, toward the sheet material on the roll. A suction means is provided that blows air onto the surface of the sheet-like material at an angle smaller than a right angle and covers the direction in which the air is reflected with a hood.

  According to the above configuration, the air blowing means and the suction means are installed on at least one surface with respect to the front surface side or the back surface side of the sheet-like material, and in the process where there is a foreign object on both surfaces, By installing the air blowing means and the suction means on both, adhered foreign matters can be reliably removed. Further, since the suction means is installed so as to cover the direction opposite to the air blowing, it is possible to prevent the foreign matters scattered by the blown air from adhering to the sheet-like material again.

  Furthermore, by setting the air blowing to an angle smaller than the right angle toward the sheet on the roll, the scattering direction of the foreign matter can be adjusted, and even when hard foreign matter such as metal powder is attached, There is no risk of wrinkling the sheet by pressure.

  In the foreign object removing apparatus for sheet-like material according to the present invention, a preferred embodiment of the block installed in front of the hood of the suction means is a columnar structure.

  According to the above configuration, the cylindrical shape can sufficiently exert the Coanda effect on the curved surface, can effectively guide air into the hood of the suction means, and can accurately collect foreign matters with the suction means. It becomes possible.

  More preferably, the block is made of a metal material having a smooth surface, which is superior in that the effect of the Coanda effect is enhanced and air can be more effectively guided into the hood of the suction means.

  In the foreign object removing apparatus for sheet-like material according to the present invention, the block installed in front of the hood of the suction means is preferably structured to rotate with respect to the traveling direction of the sheet-like material.

  According to the said structure, it becomes possible to guide and remove the foreign material adhering to the surface of the block by the blown air into the hood of the suction means by adopting a structure in which the block rotates.

  Preferably, using a metal roll for the block and rotating it to the opposite side of the air flow direction, it is excellent in that the foreign matter adhering to the surface of the roll can be accurately removed.

  More preferably, by using a metal roll for the block and rotating it to the opposite side of the air flow direction, the sheet-like material is made to have the same traveling speed of the sheet-like material and the peripheral speed of the roll. Even when it comes into contact with the roll by vibration or the like, it is excellent in that there is no risk of wrinkling the sheet-like material.

  The method for removing foreign matter from a sheet-like material according to the present invention relates to the removal of, for example, dust or minute foreign matter adhering to the surface of a traveling sheet-like material by blowing air at a position passing over a roll and sucking from the opposite direction of the blowing air. In front of the suction means, for example, a block using the Coanda effect is installed to guide the air flowing along the surface of the sheet-like material into the hood of the suction means.

  According to the above method, since air is blown at a position where the sheet-like material passes over the roll, it is possible to prevent the sheet-like material from being vibrated by the air and being charged, or from being broken. Therefore, it is possible to blow stronger air than a free sheet-like material that is not supported by the roll, and as a result, the adhering foreign matter can be reliably removed. Here, it is preferable that the direction in which the air is blown is opposite to the direction in which the sheet-like object moves, in that foreign matter is easily peeled off by air.

  Further, since suction is performed from the opposite direction to the air blowing, it is preferable in that foreign matter can be prevented from being scattered on the winder side by the blown air and reattaching to the sheet.

  Furthermore, by installing a block using the Coanda effect, for example, in front of the suction means, air flowing along the surface of the sheet-like object due to the Coanda effect can be guided into the hood of the suction means, and foreign matter can be captured. It is effective in that the collection is performed reliably.

  The foreign matter removing method for a sheet-like material according to the present invention preferably performs air blowing and suction on at least one surface with respect to the front surface side or the back surface side of the sheet-like material, and is perpendicular to the sheet material on the roll. The air is blown onto the surface of the sheet-like object at a smaller angle, and suction is performed so that the center of the direction in which the air is reflected, preferably the direction in which the air is reflected, is covered with a hood.

  According to the above method, air blowing and suction are performed on at least one surface with respect to the front surface side or the back surface side of the sheet-like material, and in both the front surface side and the back surface side in the process where there is a foreign substance on both surfaces. By performing air blowing and suction, the adhered foreign matter can be reliably removed. Further, since the suction is performed so as to cover the direction opposite to the air blowing, there is an effect that the foreign matter scattered by the blown air can be prevented from adhering to the sheet-like material again.

  Furthermore, by setting the air blowing to an angle smaller than the right angle toward the sheet on the roll, the scattering direction of the foreign matter can be adjusted, and even when hard foreign matter such as metal powder is attached, There is no risk of wrinkling the sheet by pressure.

  In the sheet foreign matter removing method according to the present invention, a preferred embodiment of the block installed in front of the hood of the suction means is a columnar shape.

  According to the above method, the cylindrical shape sufficiently exhibits the Coanda effect on the curved surface, can effectively guide air into the hood of the suction means, and can accurately collect foreign matters. .

  More preferably, the block is made of a metal material having a smooth surface, which is superior in that the effect of the Coanda effect is enhanced and air can be more effectively guided into the hood of the suction means.

  In the foreign matter removing method for a sheet-like material according to the present invention, the block installed in front of the hood of the suction means is preferably rotatable with respect to the traveling direction of the sheet-like material.

  According to the above method, the rotation of the block allows the foreign matter attached to the surface of the block by the blown air to be guided and removed into the suction hood.

  Preferably, the block is made of a metal roll, which is excellent in that the foreign matter adhering to the surface of the roll can be accurately removed by rotating the block to the opposite side of the air flow direction.

  More preferably, the block is made of a metal roll, rotated in the opposite direction of the air flow direction, and the sheet speed is controlled by the vibration and the like by controlling the traveling speed of the sheet and the peripheral speed of the roll equally. Even in contact, it is excellent in that there is no risk of wrinkling the sheet-like material.

  According to the present invention, the foreign matter adhering to the surface of the sheet-like material is not dependent on the type, shape or size of the foreign matter, and is stable and efficient over a long period without damaging the sheet-like material. There is an effect that it can be removed.

  Below, the foreign material removal apparatus and method of the sheet-like material concerning this invention are demonstrated based on FIGS. In addition, the following embodiment is an example which actualized this invention, Comprising: The thing of the character which limits the technical scope of this invention is not.

  FIG. 1 is a schematic diagram showing a schematic configuration of a foreign object removing apparatus for sheet-like material according to an embodiment of the present invention.

  In FIG. 1, when a moving sheet-like object 2 passes through a roll 3, an air jet nozzle 1 is installed on the roll 3 and the air direction is adjusted at an angle θ smaller than a right angle with respect to the sheet-like object 2. A hood 5 of a suction device (not shown) is installed in a direction opposite to the spraying, and a block 6 that guides the air flowing along the surface of the sheet-like material into the suction hood is installed in front of the suction hood 5. When the foreign matter 4 adhering to the surface of the sheet-like material 2 is blown away in the direction of the suction hood 5 by the air continuously blown, the air flowing along the surface of the sheet-like material 2 by the air induction block 6 is also induced by the Coanda effect. A foreign substance that flows along the surface of the block 6 and is guided to the suction hood 5 and scattered by the air can be accurately collected by the suction device.

  The air jet nozzle 1 is a device that is connected to an air source through a dehumidifying device or an air filter (not shown) and ejects air from the tip of the nozzle. For example, an Ikeuchi flat type air nozzle (TAIFU-Jet type) is used. Can be used.

  The pressure of the air source supplied to the air jet nozzle 1 needs to be set from the vibration of the sheet-like material when air is blown, the state of wrinkles, and the state in which foreign matter 4 can be blown off, preferably 0.1 MPa. It sets to -0.7MPa, More preferably, it sets to 0.3MPa-0.5MPa.

  In addition, the air jet nozzle 1 is preferably arranged so as to blow air over the entire width direction of the sheet-like material 2, and the flat type air nozzles are alternately installed with the position slightly shifted before and after the traveling direction of the sheet-like material 2. It is preferable to do.

  The air blowing angle θ, that is, the angle formed between the extended line of air blowing from the air jet nozzle 1 and the tangent of the sheet-like object 2 on the roll 3 is set to an angle θ smaller than a right angle, and the angle θ is 20 ° to It is preferable to set in the range of 60 °. When air is blown at an angle close to a right angle, the sheet-like material 2 may be wrinkled by air pressure if hard foreign matter such as metal powder adheres.

  Since the air flow velocity attenuates in inverse proportion to the distance, the distance between the tip of the air jet nozzle 1 and the sheet-like object 2 is more advantageous as it is close to the extent that it does not contact the sheet-like object 2 and should be 50 mm or less. preferable.

  If the sheet-like material 2 has high electrical insulation, the sheet-like material 2 may be charged while moving, and foreign matter may not be blown away by air due to electrostatic attraction, and is shown on the upstream side where the air jet nozzle 1 is installed. It is preferable to install a static eliminating device that is not present and suppress the charging voltage of the sheet-like material 2 to ± 0.5 kV or less. The static elimination means is provided with a static elimination bar, an ionizer air device or the like on at least one side of the sheet-like material 2.

  Moreover, it is preferable to install the foreign material removal apparatus similar to the above on the opposite surface of the sheet-like object 2 shown in FIG.

  Further, the air guide block 6 installed in front of the hood of the suction means is sufficiently cylindrical to exhibit the Coanda effect on the curved surface, so that air can be effectively guided to the suction hood 5 and foreign matters can be accurately detected. It is preferable in terms of collection.

  More preferably, the block 6 is made of a metal material having a smooth surface, which enhances the action of the Coanda effect and is superior in that air can be more effectively guided to the suction hood 5.

  The air induction block 6 installed in front of the suction hood 5 has a structure that rotates in the traveling direction of the sheet-like object 2.

  Further, the air guide block 6 installed in front of the suction hood 5 has a structure in which the block rotates, so that foreign matter adhering to the surface of the air guide block 6 by the blown air is also guided to the suction hood 5 and removed. It becomes possible.

  Preferably, a metal roll is used as the air guide block 6 and is excellent in that the foreign matter adhering to the surface of the metal roll is accurately removed by rotating the roll to the opposite side of the air flow direction.

  More preferably, a metal roll is used as the air guide block 6 and rotated to the opposite side of the air flow direction to make the traveling speed of the sheet-like object 2 equal to the peripheral speed of the roll. Even when the object 2 comes into contact with the metal roll by vibration or the like, the sheet 2 is excellent in that there is no risk of wrinkling.

  As described above, as a method of removing dust and minute foreign matters attached to the surface of the sheet-like object 2, an angle θ smaller than a right angle with respect to the sheet-like object 2 on the roll 3 before winding the sheet-like object 2. It is possible to remove foreign matter with high accuracy by adjusting the wind direction and blowing air, and efficiently sucking and collecting the foreign matter 4 into the suction hood 5 through the air guide block 6 from the opposite direction. Become.

  Hereinafter, embodiments of the present invention will be described based on examples.

Example 1
In the process of running imide-based resin film, for a film with a thickness of 25 μm, an air jet nozzle, an air guide block, and a suction hood are installed in a part of the film width direction with the arrangement shown in FIG. The foreign substance removal performance on the film surface was evaluated by the foreign substance inspection apparatus in FIG.

  As the foreign matter to be evaluated, plastic powder or fiber having a size of 100 μm to 2000 μm was intentionally attached to the film on the upstream side of the foreign matter removing apparatus.

  The air jet nozzle is a flat air nozzle made by Ikeuchi (TAIFU-Jet type), the air source pressure is set to 0.4 MPa, and the distance between the air jet nozzle tip and the film is 30 mm with respect to the film on the roll. The air was blown at an angle of about 30 ° in the tangential direction of the film, and the air was blown. On the upstream side of the air blowing, a neutralizing bar was installed on the opposite side of the film to the air blowing, and the film was adjusted to have a charge of ± 1 kv or less.

  The suction hood was installed in the opposite direction to air blowing, and a φ50 mm metal roll was installed as an air induction block in front of the suction hood. At this time, the arrangement of the metal roll was adjusted so that the blown air flowed into the suction hood, and it was confirmed with an anemometer that the air flowing along the film surface could be guided into the hood.

  As a result of the evaluation by the foreign substance inspection apparatus on the downstream side under the above-mentioned conditions, the foreign substance having a size of 100 μm to 2000 μm which is artificially attached on the upstream side of the foreign substance removal apparatus is not detected by the foreign substance inspection apparatus on the downstream side. It was confirmed that the foreign matter could be removed reliably.

(Comparative Example 1)
Evaluation was performed under the same conditions as in Example 1 except that a metal roll of an air induction block was not installed in front of the suction hood.

  As a result of the evaluation with the foreign substance inspection apparatus on the downstream side under the above-mentioned conditions, the foreign substance having a size of 100 μm to 2000 μm which is artificially attached on the upstream side of the foreign substance removal apparatus is about 40% in the foreign substance inspection apparatus on the downstream side. As a result, it was confirmed that about 40% of foreign matter was not collected when no air guide block was installed.

The figure which shows an example of the foreign material removal method which concerns on embodiment of this invention, and its apparatus. The figure which shows an example of the foreign material removal method which concerns on embodiment of the comparative example 1, and its apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air jet nozzle 2 Sheet-like thing 3 Roll 4 Adhering foreign material 5 Suction hood 6 Air induction block A Travel direction of sheet-like thing

Claims (8)

  In the foreign matter removing apparatus for removing foreign matter adhered to the surface of the traveling sheet, the air blowing means for blowing air at a position passing over the roll, the hooded suction means installed in the opposite direction of the air blowing means, An apparatus for removing foreign matter from a sheet-like material, comprising a block for guiding air flowing along the surface of the sheet-like material into the hood of the suction device in front of the hood of the suction device.   In the foreign matter removing apparatus, the air blowing means and the suction means are installed on at least one surface with respect to the front surface side or the back surface side of the sheet-like material, and air at an angle smaller than a right angle toward the sheet-like material on the roll. 2. A foreign matter removing apparatus according to claim 1, further comprising suction means for spraying the surface of the sheet-like material and covering the air reflecting direction with a hood.   The foreign matter removing apparatus according to claim 1, wherein the block installed in front of the hood of the suction means of the foreign matter removing apparatus has a cylindrical structure.   The foreign matter removing apparatus according to claim 1, wherein the block installed in front of the hood of the suction means of the foreign matter removing apparatus has a structure that rotates with respect to the traveling direction of the sheet-like material.   In the foreign matter removal method for removing foreign matter attached to the surface of a traveling sheet, air is blown at a position that passes over the roll, sucked from the opposite direction of the blown air, and a block is installed in front of the hood of the suction means. A method of removing foreign matter from a sheet-like material, wherein air flowing along the surface of the sheet-like material is guided into a hood of a suction means.   In the foreign matter removing method, air is blown and sucked on at least one surface with respect to the front surface side or the back surface side of the sheet material, and the air is sheet-shaped at an angle smaller than a right angle toward the sheet material on the roll. 6. The foreign matter removing method according to claim 5, wherein the foreign matter is sprayed on the surface of the object so as to cover the direction in which the air is reflected with a hood.   6. The foreign matter removing method according to claim 5, wherein the block installed in front of the hood of the suction means of the attached foreign matter removing method has a cylindrical shape.   6. The foreign matter removing method according to claim 5, wherein the block installed in front of the hood of the suction means of the attached foreign matter removing method is rotatable with respect to the traveling direction of the sheet-like material.

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