Foreign object removal device

Abstract

To provide a foreign matter removal device capable of efficiently removing foreign matter adhering to a workpiece.SOLUTION: A foreign matter removal device removes foreign matter adhering to an outer peripheral surface of a workpiece obtained by cutting an outer peripheral surface of a laminate composed by laminating a plurality of sheets of films with adhesive layers. The foreign matter removal device includes: a holding unit which holds the workpiece so as to be exposed from the outer peripheral surface; and a foreign matter removal unit which has a delivery roller for delivering an adhesive tape, a winding roller which winds the adhesive tape delivered from the delivery roller, and an abutting roller which is arranged between the delivery roller and the winding roller and is configured so that the adhesive tape can be pressed on the workpiece.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a foreign matter removing device.

Background Art

[0002] Conventionally, it has been known to perform cutting on the end face of a workpiece in which a plurality of films are stacked using a cutting tool such as an end mill. However, when a film with an adhesive layer is used as the film, there is a problem that foreign matter (cutting chips) adheres to the cut surface after cutting. Conventionally, when such foreign matter occurs, it has been removed manually using an adhesive tape or the like, but such work is complicated and has a problem in efficiency. Also, it is disadvantageous in that an excessive amount of adhesive tape is required.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention has been made to solve the above conventional problems, and its main object is to provide a foreign matter removing device capable of efficiently removing foreign matter adhering to a workpiece.

Means for Solving the Problems

[0005] The foreign matter removal device of the present invention is a foreign matter removal device that removes foreign matter adhering to the outer peripheral surface of a workpiece obtained by cutting the outer peripheral surface of a laminate formed by laminating a plurality of films with an adhesive layer, and holds the workpiece so that the outer peripheral surface is exposed. The holding unit, a feeding roller that feeds out an adhesive tape, a winding roller that winds up the adhesive tape fed out from the feeding roller, and an abutting roller that is disposed between the feeding roller and the winding roller and is configured to be able to press the adhesive tape against the workpiece. It comprises a foreign matter removal unit having. In one embodiment, the workpiece is configured to be rotatable. In one embodiment, the abutting roller is configured to be movable back and forth following the shape and rotation of the workpiece. In one embodiment, the abutting roller is an elastic roller having an elastic layer on its surface. In one embodiment, the thickness of the elastic surface layer of the elastic roller is 4 mm or more. In one embodiment, the pressing force of the abutting roller is 0.2 MPa to 0.5 MPa. According to another aspect of the present invention, a foreign matter removal method is provided. This foreign matter removal method is a method of removing foreign matter adhering to the outer peripheral surface of a workpiece obtained by cutting the outer peripheral surface of a laminate formed by laminating a plurality of films with an adhesive layer using the above foreign matter removal device, and setting the workpiece in the holding unit. Rotating the workpiece about the vertical axis of the workpiece, and removing foreign matter adhering to the outer peripheral surface of the workpiece while pressing the adhesive tape running through the foreign matter removal unit against the outer peripheral surface of the workpiece. In one embodiment, the foreign matter removal method includes pressing the adhesive tape running through the foreign matter removal unit against the outer peripheral surface of the workpiece while rotating the workpiece about the vertical axis of the workpiece after setting the workpiece. In one embodiment, the workpiece is obtained by cutting the outer peripheral surface of the laminate by bringing a cutting means into contact with the outer peripheral surface of the laminate while rotating the laminate about a vertical axis, and the rotational speed of the workpiece is higher than the rotational speed of the laminate when cutting the outer peripheral surface. In one embodiment, the rotational direction of the workpiece is opposite to the rotational direction of the laminate when cutting the outer peripheral surface.

Advantages of the Invention

[0006] According to the present invention, it is possible to provide a foreign matter removing device that can efficiently remove foreign matter adhering to a workpiece.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0008] Hereinafter, specific embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to these embodiments. For clarity, the drawings are schematically represented, and furthermore, ratios such as length, width, and thickness in the drawings, as well as angles, etc., are different from the actual ones.

[0009] A. Foreign object removal device FIG. 1 is a schematic perspective view of a foreign matter removing device according to one embodiment of the present invention. The foreign matter removing device 100 in the illustrated example includes a holding unit 10 and a foreign matter removing unit 20.

[0010] The holding unit 10 is an element that holds the work W, and holds the work W such that the outer peripheral surface of the work W is exposed. The work W is obtained by cutting the outer peripheral surface of a laminate formed by laminating a plurality of films with an adhesive layer. The work W obtained by cutting the outer peripheral surface of the laminate has a lot of foreign matter (cutting chips) attached to its outer peripheral surface. The foreign matter removing device 10 of the present invention travels on the outer peripheral surface of the work W held by the holding unit 10 by the foreign matter removing unit 20, and presses the adhesive surface of the adhesive tape 30 having an arbitrary appropriate adhesive force against the outer peripheral surface, thereby removing the foreign matter attached to the outer peripheral surface of the work W. According to the foreign matter removing device of the present invention, a new portion (a portion not used for foreign matter removal) of the adhesive surface of the adhesive tape 30 can be sequentially supplied to the contaminated portion of the outer peripheral surface of the work W, and the foreign matter can be efficiently and automatically removed.

[0011] In one embodiment, the holding unit 10 is composed of two holding means having a shaft 11 and a pressing portion 12 disposed at the tip of the shaft 11. The work W can be pressed and held by the holding means arranged so that the pressing portions 12 face each other.

[0012] In one embodiment, the work W can be rotated about the vertical axis of the work W. In this embodiment, it is possible to efficiently and automatically clean the entire outer circumference of the work W. Also, it is advantageous in that a new portion (a portion not used for foreign matter removal) of the adhesive surface of the adhesive tape 30 can always be supplied to the contaminated portion of the outer peripheral surface of the work W.

[0013] The foreign matter removing unit 20 has a function of continuously running a long adhesive tape 30, and has a feeding roller 21, a winding roller 22, and a contact roller 23. The feeding roller 21, the winding roller 22, and the contact roller 23 can be arranged on a single pedestal 24.

[0014] For the pay-out roller 21, roller members (tape holders) such as metal rollers, rubber rollers, and resin rollers can be used. The pay-out roller 21 may be a roller having a drive source or a roller without a drive source. In one embodiment, the pay-out roller 21 is configured to rotate as the adhesive tape 30 travels without having a drive source by itself. The pay-out roller 21 may apply back tension to the adhesive tape 30 by means such as a powder brake.

[0015] For the take-up roller 22, roller members such as metal rollers, rubber rollers, and resin rollers can be used. The take-up roller 22 has a drive source and rotates to take up the adhesive tape 30. In one embodiment, the take-up roller 22 takes up the adhesive tape 30 fed and traveling by the contact roller 23 pressed against the rotating workpiece W and trailing along. In this way, the usage amount of the adhesive tape 30 can be reduced. The take-up roller 22 may apply back tension to the adhesive tape 30 by means such as a powder brake.

[0016] The contact roller 23 is disposed between the pay-out roller 21 and the take-up roller 22 (in the middle of the traveling path of the adhesive tape 30). The contact roller 23 can be disposed such that the traveling direction of the adhesive tape 30 changes due to the contact roller 23. Also, the contact roller 23 is preferably disposed such that the wrap angle of the adhesive tape 30 is between 45° and 200°, and more preferably between 90° and 180°.

[0017] The contact roller 23 can be configured to be movable back and forth, and can be positioned away from the workpiece W before and after the foreign matter removal operation, and can move so as to contact the outer peripheral surface of the workpiece W during the foreign matter removal operation. Further, the contact roller 23 is biased by a predetermined driving means so as to follow the shape and rotation of the workpiece W, and is configured such that the contact roller can move back and forth. In this way, during foreign matter removal, the contact roller can be positioned corresponding to the outermost rotation locus of the workpiece W, and the adhesive tape 30 can always be pressed against the workpiece W by the contact roller 23 during the foreign matter removal operation. The contact roller 23 can be configured to be driven without a drive source and to be dragged and rotated by being pressed against the rotating workpiece W. The contact roller 23 can be arranged such that the rotation axis extends in the stacking direction of the workpiece W.

[0018] The back-and-forth movement of the contact roller 23 can be performed by any suitable means. The back-and-forth movement of the contact roller 23 can be performed using a driving means such as a cylinder (air cylinder, hydraulic cylinder, etc.), a spring, a motor, etc. Preferably, the pay-off roller 21, the take-up roller 22, and the contact roller 23 are arranged on a single pedestal 24, and the contact roller 23 is moved back and forth by moving the pedestal 24 back and forth.

[0019] In one embodiment, as shown in FIG. 2, a cylinder 25 and a spring 26 are combined to move the contact roller 23 (or the pedestal 24 on which the roller 23 is arranged) back and forth. In one embodiment, the spring 26 is used for the forward movement of the contact roller 23 (movement toward the workpiece W) and the pressing of the contact roller 23 against the workpiece W, and the cylinder 25 (preferably an air cylinder) is used for the backward movement of the contact roller 23. The spring 26 may be used to press the contact roller 23 against the workpiece W.

[0020] In one embodiment, the contact roller 23 is an elastic roller having an elastic layer on its surface. By using an elastic roller, when the contact roller 23 is pressed against the workpiece W, the surface of the roller deforms, enabling the contact roller 23 to well follow the minute unevenness on the outer peripheral surface of the workpiece, and also enabling the contact roller 23 to follow the inclined workpiece. As a result, the generation of a gap between the contact roller 23 (substantially the adhesive tape 30) and the workpiece W can be prevented.

[0021] The pressing pressure of the contact roller 23 is preferably 0.2 MPa to 0.5 MPa, more preferably 0.3 MPa to 0.4 MPa. By pressing the contact roller 23 against the workpiece W with such a pressing pressure and running the adhesive tape 30 between the contact roller 23 and the workpiece W, foreign matter attached to the outer periphery of the workpiece W can be removed better, and the quality of the outer peripheral surface can be maintained well.

[0022] The hardness (JIS A) of the elastic layer is preferably less than 60°, more preferably less than 50°, still more preferably 20° to 40°, and particularly preferably 20° to 40°. If it is within such a range, foreign matter attached to the outer periphery of the workpiece W can be removed better.

[0023] The elastic layer can be formed of any suitable material. Examples of materials for forming the elastic layer include, for example, butyl rubber, fluorine rubber, acrylic rubber, ethylene propylene rubber (EPDM), nitrile butadiene rubber (NBR), acrylonitrile butadiene styrene rubber, natural rubber, isoprene rubber, styrene-butadiene rubber, butadiene rubber, ethylene-propylene rubber, ethylene-propylene terpolymer, chloroprene rubber, chlorosulfonated polyethylene, chlorinated polyethylene, urethane rubber, syndiotactic 1,2-polybutadiene, epichlorohydrin rubber, silicone rubber, fluorine rubber, polysulfide rubber, polynorbornene rubber, hydrogenated nitrile rubber, thermoplastic elastomers (such as polystyrene-based, polyolefin-based, polyvinyl chloride-based, polyurethane-based, polyamide-based, polyurea, polyester-based, fluororesin-based), and mixtures thereof.

[0024] The thickness of the elastic layer is preferably 4 mm or more, more preferably 5 mm or more, and even more preferably 7 mm or more. Within such a range, foreign matter adhering to the outer periphery of the work W can be removed more favorably.

[0025] The outer diameter of the contact roller 23 is preferably 10 mm to 100 mm, and more preferably 20 mm to 60 mm. The width of the contact roller 23 is preferably equal to or greater than the thickness of the work W.

[0026] B. Foreign object removal method The foreign matter removal method of the present invention is a method for removing foreign matter adhering to the outer peripheral surface of a predetermined work using the above-described foreign matter removal device.

[0027] The foreign matter removal method of the present invention includes setting the work in the holding unit of the foreign matter removal device, and removing the foreign matter adhering to the outer peripheral surface of the work while pressing the adhesive tape on which the foreign matter removal unit travels against the outer peripheral surface of the work.

[0028] The above workpiece is obtained by cutting the outer peripheral surface of a laminate formed by laminating a plurality of films with an adhesive layer. As the film with an adhesive layer, any appropriate film can be used. For example, a resin film with an adhesive layer (e.g., an optical film), a glass film with an adhesive layer, a composite film thereof, and the like can be mentioned. The above laminate is typically cut into any appropriate shape when forming the workpiece. Specifically, the optical laminate may be cut into a rectangular shape, a shape similar to a rectangular shape, or an appropriate shape according to the purpose (e.g., circular).

[0029] The outer periphery of the workpiece is cut by any appropriate cutting means. The cutting can be performed by bringing the cutting edge of the cutting means into contact with the outer peripheral surface of the above laminate. The cutting may be performed over the entire circumference of the outer peripheral surface of the above laminate or only at a predetermined position. Examples of the cutting means include an end mill. In one embodiment, the above workpiece is obtained by bringing the cutting means into contact with the outer peripheral surface of a laminate formed by laminating a plurality of films with an adhesive layer while rotating the laminate around a vertical axis. In one embodiment, such cutting is performed while holding the above laminate in the above holding unit. The workpiece obtained after cutting can be fed into a foreign matter removing device while being held in the holding unit and subjected to a foreign matter removing process.

[0030] The rotational speed (rps) of the workpiece during the above cutting is, for example, 0.02 rps to 0.04 rps.

[0031] In one embodiment, after setting the workpiece in the holding unit, while rotating the workpiece around the vertical axis as described above, the adhesive tape running on the foreign object removing unit is pressed against the outer peripheral surface of the workpiece. Typically, the contact roller of the foreign object removing unit is moved forward to press the contact roller against the workpiece. At this time, in the foreign object removing unit, an adhesive tape is set from the pay-out roller provided in the foreign object removing unit to the take-up roller, and by the forward movement of the contact roller, the adhesive tape running on the foreign object removing unit is pressed against the outer peripheral surface of the workpiece. Thereby, foreign objects attached to the outer peripheral surface of the workpiece can be removed by the adhesive surface of the adhesive tape that has come into contact with the workpiece. In one embodiment, the adhesive tape runs by means of a contact roller that follows the rotation of the workpiece.

[0032] In one embodiment, the rotational speed of the workpiece is higher than the rotational speed of the laminate when machining the outer peripheral surface. The rotational speed (rps) of the workpiece is, for example, 0.05 rps to 0.5 rps.

[0033] The rotational speed of the workpiece does not have to be constant. For example, when a rectangular workpiece is used for foreign object removal, the rotational speed of the workpiece may be decreased before and after the corner of the workpiece comes into contact with the adhesive tape. By doing so, it becomes easier for the contact roller to follow a sudden change in the outermost rotational locus of the workpiece. In particular, when the contact roller suddenly moves forward, for example, at a corner where the contact position of the adhesive tape switches from the short side to the long side (when cleaning such that the angle changes suddenly while the foreign object removing unit moves forward), it is preferable to decrease the rotational speed of the workpiece. In one embodiment, the rotational speed of the workpiece when the corner of the workpiece comes into contact with the adhesive tape is set to 50% to 90% of the rotational speed of the workpiece when the straight portion of the workpiece comes into contact with the adhesive tape.

[0034] The pressing pressure of the contact roller against the workpiece is preferably 0.2 MPa to 0.5 MPa, more preferably 0.3 MPa to 0.4 MPa. With such a pressing pressure, the contact roller is pressed against the workpiece, and the adhesive tape is run between the contact roller and the workpiece, so that foreign matter attached to the outer periphery of the workpiece can be removed more favorably. Also, delamination between the films constituting the workpiece and chipping of the adhesive layer can be prevented, and the quality of the outer peripheral surface can be maintained favorably.

[0035] In one embodiment, the rotation direction of the workpiece is opposite to the rotation direction of the laminate when cutting the outer peripheral surface. In this way, foreign matter attached to the outer periphery of the workpiece can be removed more favorably.

[0036] In the above foreign matter removal method, the number of rotations of the workpiece from the start to the end of the foreign matter removal operation is preferably 1 to 10 rotations, more preferably 1 to 5 rotations, and even more preferably 1 rotation. According to the present invention, foreign matter on the outer periphery of the workpiece can be removed in a short time. The end face (outer periphery) of the workpiece may be cleaned for one revolution, two revolutions, or three or more revolutions.

Example

[0037] Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to these examples.

[0038] <Example 1> Using the foreign matter removal device shown in FIG. 1, while rotating a workpiece (total thickness: about 10 mm) obtained by cutting the outer peripheral surface of a laminate composed of a plurality of laminated films with an adhesive layer, an adhesive tape running in the foreign matter removal unit was pressed against the outer periphery of the workpiece to remove foreign matter attached to the outer periphery of the workpiece. The contact roller was configured such that an elastic layer (urethane rubber, thickness: 7.5 mm) was provided on the outer periphery of an iron core (φ15 mm), and the hardness (JIS A) of the elastic layer was 50°. Also, the rotation speed of the workpiece was 0.2 rps, and the rotation direction was opposite to the rotation direction of the laminate when cutting the outer peripheral surface. The foreign matter removal operation was completed with one rotation of the workpiece. When visually inspecting the outer appearance of the outer circumference of the workpiece, no adhesion of foreign matter was observed. The outer appearance of the outer circumference of the workpiece before the foreign matter removal operation is shown in Fig. 3(a), and the outer appearance of the outer circumference of the workpiece after the foreign matter removal operation is shown in Fig. 3(b).

[0039] <Examples 2 to 8> Foreign matter removal from the outer circumference of the workpiece was performed in the same manner as in Example 1, except that the core diameter of the contact roller, the thickness of the elastic layer, and the hardness of the elastic layer were set to the values shown in Table 1. The appearance after the foreign matter removal operation was visually inspected and evaluated according to the following criteria. △: A decrease in foreign matter (adhesive layer component) was confirmed, but residual foreign matter was also observed, and further foreign matter removal by manual work was necessary. 〇: A considerable amount of foreign matter had decreased, and the labor for further foreign matter removal by manual work was slight. ◎: No foreign matter was confirmed, and no further foreign matter removal by manual work was necessary.

[0040]

Table 1

Industrial Applicability

[0041] The foreign matter removal device of the present invention can be suitably used when removing foreign matter adhering to the outer peripheral surface of a workpiece obtained by cutting the outer peripheral surface of a laminate composed of a plurality of laminated adhesive layer films.

Explanation of Signs

[0042] 10 Holding unit 20 Foreign matter removal unit 21 Pay-out roller 22 Take-up roller 23 Contact roller 25 Cylinder 26 Spring 30 Adhesive tape 100 Foreign matter removal device

Claims

1. A foreign object removing device for removing foreign objects adhering to the outer peripheral surface of a rectangular workpiece obtained by cutting the outer peripheral surface of a laminate formed by laminating a plurality of films with an adhesive layer, comprising: a holding unit that holds the workpiece such that the outer peripheral surface is exposed; a feeding roller that feeds an adhesive tape, a winding roller that winds up the adhesive tape fed from the feeding roller, and a contact roller disposed between the feeding roller and the winding roller and configured to be able to press the adhesive tape against the workpiece, and a foreign object removing unit having the same; the workpiece is rotatable; while rotating the workpiece about a vertical axis, pressing the adhesive tape traveling with the foreign object removing unit against the outer peripheral surface of the workpiece, and configured such that the rotational speed of the workpiece is reduced before and after the corner of the workpiece contacts the adhesive tape. Foreign object removing device.

2. The foreign object removing device according to claim 1, wherein the contact roller pressed against the workpiece is configured to be able to move back and forth following the shape and rotation of the workpiece.

3. The foreign object removing device according to claim 1 or 2, wherein the contact roller is an elastic roller having an elastic layer on its surface.

4. The foreign object removing device according to claim 3, wherein the thickness of the elastic surface layer of the elastic roller is 4 mm or more.

5. The foreign object removing device according to any one of claims 1 to 4, wherein the pressing force of the contact roller is 0.2 MPa to 0.5 MPa.

6. A method for removing foreign objects adhering to the outer peripheral surface of a workpiece obtained by cutting the outer peripheral surface of a laminate formed by laminating a plurality of films with an adhesive layer, using the foreign object removing device according to any one of claims 1 to 5, comprising: setting the workpiece in the holding unit, and removing foreign objects adhering to the outer peripheral surface of the workpiece while pressing the adhesive tape traveling with the foreign object removing unit against the outer peripheral surface of the workpiece, and after setting the workpiece, pressing the adhesive tape traveling with the foreign object removing unit against the outer peripheral surface of the workpiece while rotating the workpiece about a vertical axis. Foreign object removing method.

7. The workpiece is a workpiece obtained by cutting the outer peripheral surface by bringing a cutting means into contact with the outer peripheral surface of the laminate while rotating the laminate about a vertical axis. The rotational speed of the workpiece is higher than the rotational speed of the laminate when cutting the outer peripheral surface. The foreign matter removal method according to claim 6.

8. The rotational direction of the workpiece is opposite to the rotational direction of the laminate when cutting the outer peripheral surface, and the foreign matter removal method according to claim 7.

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