Apparatus and method for removing extraneous material, recycling method for sheet material, and manufacturing method for electronic components

Abstract

To provide an adhering substance removal device capable of removing adhering substances safely and easily.SOLUTION: An adhering substance removal device 1 of the invention includes: a delivery mechanism 120 which delivers an elongated sheet member 100; a winding mechanism 130 which winds up the sheet member 100 delivered by the delivery mechanism 120; a pressing member 140 which presses the sheet member 100 from a rear surface side to fold the sheet member 100 so that its front surface side forms a protruding shape in a period from delivery of the sheet member 100 by the delivery mechanism 120 to winding up the sheet member 100 by the winding mechanism 130; a rear surface side air nozzle 170 which blows air to the rear surface side of the sheet member 100 at an upstream side in a transport direction of the sheet member 100 relative to the pressing member 140; and a dust collection mechanism 180 which collects adhering substances peeled from the sheet member 100.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an apparatus for removing adhering matter, a method for removing adhering matter, a method for recycling sheet members, and a method for manufacturing electronic components. [Background technology]

[0002] In the case of electronic components such as multilayer ceramic capacitors, a plurality of ceramic green sheets are laminated together, and in order to improve the ease of handling, the ceramic green sheets are backed with a sheet member such as a PET film.

[0003] In recent years, there has been a demand for the reuse of materials as a measure to conserve environmental resources, and such sheet members are returned to the raw material level after the attachments on the sheet members have been removed, and are pelletized and reused. Conventionally, a method for removing attachments on such sheet members has been to wash the sheet members with an organic solvent (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-291690 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when cleaning sheet members with an organic solvent, the organic solvent used for cleaning must be purified because disposing of the solvent as is can have a negative impact on the environment, which is time-consuming and requires a large amount of water for purification, making it unenvironmentally friendly.

[0006] The present invention aims to provide an apparatus and method for removing adhering matter that can safely and easily remove adhering matter, as well as an efficient method for recycling sheet members and a method for manufacturing electronic components. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides a device for removing adhesions from a sheet member, comprising: a payout mechanism for paying out a long sheet member; a winding mechanism for winding up the sheet member paid out by the payout mechanism; a pressing member for pressing the sheet member from the back side and bending the sheet member so that the front side of the sheet member is convex between being paid out by the payout mechanism and being wound up by the winding mechanism; a back side air nozzle for blowing air toward the back side of the sheet member upstream of the pressing member in the conveying direction of the sheet member; and a dust collection mechanism for collecting adhesions peeled off from the sheet member.

[0008] In addition, in order to solve the above-mentioned problems, the present invention provides a method for removing adhesions from a sheet member, which includes unrolling a long sheet member having adhesions on its surface, blowing air onto the back side of the sheet member using a back-side air nozzle to remove the adhesions transferred from the front side to the back side, pressing the sheet member from the back side with a pressing member and folding the sheet member so that the front side of the sheet member is convex, thereby peeling off the adhesions from the front side of the sheet member, peeling the adhesions from the sheet member and collecting them, and rolling up the sheet member from which the adhesions have been peeled off.

[0009] Furthermore, the present invention provides a method for producing a sheet member having a long shape and a surface with a deposit thereon, The method for recycling a sheet member includes blowing air onto the back side of the sheet member using a back-side air nozzle to remove any attached matter transferred from the front side to the back side, pressing the unwound sheet member from the back side with a pressing member to fold the sheet member so that the front side of the sheet member is convex, thereby peeling off the attached matter from the front side of the sheet member, collecting the attached matter after peeling it off from the sheet member, winding up the sheet member from which the attached matter has been peeled off, and pulverizing the sheet member from which the attached matter has been removed to form pellets.

[0010] In addition, the present invention provides a method for feeding a long sheet member having a deposit on its surface, a back-side air nozzle blowing air onto a back side of the sheet member to remove any adhesions transferred from the front side to the back side, pressing the unwound sheet member from the back side with a pressing member to fold the sheet member so that the front side of the sheet member is convex, thereby peeling off the adhesions from the front side of the sheet member, peeling off the adhesions from the sheet member and collecting the adhesions, winding up the sheet member from which the adhesions have been peeled off, crushing the sheet member from which the adhesions have been removed to form pellets, using the pellets to regenerate a long sheet member, forming a ceramic green sheet on the regenerated sheet member, and using the ceramic green sheet to manufacture an electronic component. Effect of the Invention

[0011] According to the present invention, it is possible to provide an apparatus and method for removing adhering matter that can safely and easily remove adhering matter, as well as an efficient method for recycling sheet members and a method for manufacturing electronic components. [Brief description of the drawings]

[0012] [Figure 1] 1 is a diagram showing an attachment removal device 1 according to a first embodiment. [Diagram 2] 1 is a diagram showing a sheet member 100 from which adhering matter 101 is removed by an adhering matter removal device 1. FIG. [Diagram 3] 1 is a diagram showing a multilayer ceramic capacitor 300 produced using a sheet member 100. FIG. [Figure 4] FIG. 2 is a schematic diagram of an example of a sheet peeling device 200. [Diagram 5] FIG. 13 is a diagram showing a part of the sheet peeling device 200 in a state where the peeling roll 202 is retracted from the peeling area A2. [Figure 6] FIG. 2 is a diagram showing a mother block laminate 210. [Figure 7]2 is a diagram illustrating a deposit removal unit 110 of the deposit removal device 1 of the first embodiment. FIG. [Figure 8] FIG. 2 is a diagram for explaining the positions of a wide area air nozzle 150 and a partial air nozzle 160 in the deposit removal device 1 of the first embodiment. [Figure 9] FIG. 4 is a diagram showing an attachment removal device 2 according to a second embodiment. [Figure 10] 13 is a perspective view of a blade tip 21 at the tip of a pressing blade member 20 of a second embodiment. FIG. [Figure 11] 10 is a diagram illustrating the position of a pressing blade member 20 relative to a sheet member 100 in the second embodiment. FIG. [Figure 12] 13 is a diagram illustrating a state in which a pressing blade member 20 of the second embodiment peels off a deposit 101 that is attached to the entire surface of a sheet member 100. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an attachment removal device 1 and an attachment removal method according to an embodiment of the present invention will be described. Fig. 1 is a diagram showing an attachment removal device 1, and Fig. 2 is a diagram showing a sheet member 100 from which attachment 101 is removed by the attachment removal device 1 of the embodiment.

[0014] (Sheet member 100) The sheet member 100 is long and made of a resin such as PET (polyethylene terephthalate), and has a release layer (not shown) formed on its surface on which an attachment 101 is attached. The width of the sheet member 100 is, for example, 180 mm or more and 330 mm or less, and the thickness of the sheet member 100 is, for example, 0.5 μm or more and 20 μm or less.

[0015] (Attachment 101) The attachments 101 are, for example, remnants of a ceramic green sheet, and are attached in a ladder shape. That is, the attachments 101 have two longitudinal attachments 101a extending in the longitudinal direction L while maintaining a constant widthwise distance between them on both sides of the widthwise direction W of the long sheet member 100, and a plurality of widthwise attachments 101b extending in the widthwise direction W at constant intervals in the longitudinal direction L between the two longitudinal attachments 101a.

[0016] The reason why the deposits 101 are attached in a ladder shape to the sheet member 100 will be described below. The sheet member 100 is used in an intermediate process for manufacturing a multilayer electronic component such as a multilayer ceramic capacitor 300. Fig. 3 is a diagram showing a multilayer ceramic capacitor 300 produced using the sheet member 100. The multilayer ceramic capacitor 300 is manufactured as follows.

[0017] (a) First, a release layer (not shown) is provided on the surface of a long sheet member 100 made of, for example, PET, and a slurry that will become a ceramic green sheet containing dielectric ceramic powder, a binder, a solvent, etc. is applied in sheet form to the surface of the sheet member 100 on which the release layer is provided.

[0018] (b) Next, an electrode pattern is printed on the surface of the ceramic green sheet that has been applied to the sheet member 100 in sheet form.

[0019] (c) Then, the ceramic green sheet on which the electrode pattern is printed is cut into a rectangle and peeled off from the sheet member 100 using a sheet peeling device 200.

[0020] 4 is a schematic diagram of an example of a sheet peeling device 200. The sheet peeling device 200 includes a conveying roll 201, a peeling roll 202, a cutting blade 203, a cutting stage 204, a peeling head 205, and a lamination stage 206. The cutting blade 203 and the cutting stage 204 are disposed in a cutting region A1 through which the sheet member 100 conveyed between the conveying roll 201 and the peeling roll 202 passes, and the peeling head 205 and the lamination stage 206 are disposed in a peeling region A2 downstream in the conveying direction H from the cutting region A1.

[0021] The sheet member 100 holding the ceramic green sheet on its surface, on which an electrode pattern is printed, is transported by the transport roll 201 onto the cutting stage 204 in the cutting region A1. Then, the cutting blade 203 descends, and the ceramic green sheet on which the electrode pattern is printed on the sheet member 100 is cut into a rectangle. Since it is difficult to cut out only the ceramic green sheet from the sheet member 100, a part of the sheet member 100 together with the ceramic green sheet may be cut by the cutting blade 203.

[0022] Next, the sheet member 100 is transported from the cutting area A1 to the peeling area A2. In the peeling area A2, the peeling head 205 descends, and the ceramic green sheet 101c cut into a rectangle and having an electrode pattern printed thereon is sucked in by the peeling head 205. When the ceramic green sheet 101c cut into a rectangle is sucked in and peeled off from the sheet member 100, a ladder-shaped ceramic green sheet residue remains on the sheet member 100 as an attachment 101 as shown in FIG. 2. This is the reason why the attachment 101 adheres to the sheet member 100 in a ladder shape.

[0023] (d) When the ceramic green sheet 101c cut into a rectangle is sucked by the peeling head 205, the peeling roll 202 retreats from the peeling region A2. Fig. 5 is a diagram showing a part of the sheet peeling device 200, showing the peeling roll 202 retreated from the peeling region A2.

[0024] The ceramic green sheets 101c cut into rectangular shapes are stacked on a stacking stage 206. FIG. 6 is a diagram showing a mother block laminate 210 formed by repeatedly stacking the ceramic green sheets 101c cut into rectangular shapes. The mother block laminate 210 formed by stacking a predetermined number of ceramic green sheets 101c is cut into a predetermined size to obtain a plurality of laminate chips 220. Then, external electrodes 310 are formed on the outer surfaces of the laminate chips 220, and a multilayer ceramic capacitor 300 as shown in FIG. 3 is manufactured. The laminate 210 may be sandwiched between ceramic green sheets on which no electrode pattern is printed.

[0025] On the other hand, the sheet member 100 from which the ceramic green sheet remains as a ladder-like deposit 101 is pulverized after the deposit 101 is removed to form PET pellets that are the raw material of the sheet member 100. The pellets are recycled as the sheet member 100, and the above-mentioned steps from (a) onwards are repeated.

[0026] (Deposit removal device 1) Next, a description will be given of an adhering matter removal device 1 and an adhering matter removal method according to an embodiment, which removes adhering matter 101 from a sheet member 100. Returning to FIG.

[0027] (Deposition removal section 110) 7 is a diagram illustrating the deposit removal unit 110. The deposit removal unit 110 includes a payout mechanism 120 that pays out the sheet member 100, a winding mechanism 130 that winds up the sheet member 100 paid out by the payout mechanism 120, a pressing member 140 that presses the sheet member 100 from the back side and bends the sheet member 100 so that the front side of the sheet member 100 becomes convex during the period from when the sheet member 100 is paid out by the payout mechanism 120 to when the sheet member 100 is wound up by the winding mechanism 130, a wide-area air nozzle 150 that blows air across the width direction W of the sheet member 100 toward the front side of the sheet member 100 downstream in the conveyance direction H of the sheet member 100 from the position where the pressing member 140 is disposed, and a partial air nozzle 160 that blows air toward each of both sides of the width direction W of the sheet member 100.

[0028] The deposit removal unit 110 further includes a back surface air nozzle 170 that blows air onto the back surface of the sheet member 100 upstream of the pressing member 140 in the conveying direction H of the sheet member 100 .

[0029] Further, the deposit removal section 110 includes an ionizer 191 and a removal sensor 192 downstream of the pressing member 140 in the conveying direction H. The ionizer 191 prevents the deposit 101 removed by the back surface side air nozzle 170, the pressing member 140, the wide area air nozzle 150, and the partial air nozzle 160 from being blown up by the air and re-adhering to the sheet member 100. The removal sensor 192 is, for example, a transmission type laser sensor or fiber sensor, and measures the removal rate of the removed deposit 101.

[0030] (Feeding mechanism 120) The unwinding mechanism 120 includes a unwinding roll 121, and a brake 123 for applying tension to the sheet material 100 is attached to the central shaft of the unwinding roll 121. The long sheet material 100 to which the above-mentioned deposits 101 are attached in a ladder shape is wound around the unwinding roll 121. In an embodiment, but not limited to this, the sheet material 100 is wound around the unwinding roll 121 with the surface to which the deposits 101 are attached facing the inner diameter side, and is unwound with this surface facing downward.

[0031] (Take-up mechanism 130) The winding mechanism 130 includes a winding roll 131, and a central shaft of the winding roll 131 is connected to a winding motor (not shown). The winding motor rotates to rotate the winding roll 131, and the sheet member 100 is wound against the brake 123, so that the sheet member 100 is transported with a constant tension and at a constant transport speed. In the embodiment, the transport speed of the sheet member 100 is 100 m / min or more and 250 m / min or less.

[0032] The deposit removal unit 110 further includes two auxiliary rolls, 122 and 132. The sheet member 100 unwound from the unwound roll 121 is guided and transported by the auxiliary rolls 122 and 132 with the surface to which the deposits 101 are attached facing downward, and is wound up by the winding roll 131 of the winding mechanism 130.

[0033] (Pressing member 140) In the embodiment, the pressing member 140 is a pressing blade having a pointed tip. The pressing member 140 is disposed between the auxiliary roll 122 and the auxiliary roll 132, and is pressed against the sheet member 100 from the back surface side of the sheet member 100. In the embodiment, since the front surface of the sheet member 100 faces downward, the pressing member 140 presses the sheet member 100 from above downward.

[0034] When the pressing member 140 is pressed against the sheet member 100 from the back side, the sheet member 100 is flexible and therefore bends to follow the tip shape of the pressing member 140. On the other hand, the deposit 101 attached to the sheet member 100 is a ceramic green sheet in this embodiment, and is unlikely to bend in the same manner as the tip shape of the pressing member 140. In addition, since a release agent is applied to the surface of the sheet member 100, a gap is generated between the deposit 101 and the sheet member 100, and the deposit 101 peels off from the sheet member 100 and falls downward. In this manner, the deposit 101 is separated from the sheet member 100.

[0035] If the tip radius R of the pressing member 140 is greater than 1 mm, it becomes difficult to create a difference in the degree of bending between the attachment 101 and the sheet member 100, making it difficult to peel the attachment 101 from the sheet member 100. If it is less than 0.1 mm, the sheet member 100 may be damaged, such as broken, from the cut made by the cutting blade 03. Therefore, the tip radius R of the pressing member 140 is 1 mm or less, and preferably 0.1 mm or more and 0.5 mm or less.

[0036] The sheet member 100 pressed by the pressing member 140 so that the front surface side becomes convex is folded at a folding angle θ1. If the folding angle θ1 is greater than 90°, it becomes difficult to create a difference in the degree of folding between the attachment 101 and the sheet member 100, and it becomes difficult to peel the attachment 101 from the sheet member 100. Therefore, the folding angle θ1 is 90° or less, preferably 30° to 70°, and more preferably 30° to 60°.

[0037] (Wide area air nozzle 150) As described above, the deposit 101 is formed in a ladder shape. The width-direction deposit 101b of the deposit 101 has a short length in the longitudinal direction L, so that it is unlikely to crack even when pressed by the pressing member 140, and is unlikely to form a trigger for peeling. Therefore, the deposit removal device 1 of the embodiment includes a wide-area air nozzle 150 to easily peel off the width-direction deposit 101b.

[0038] Fig. 8 is a diagram for explaining the positions of the wide-area air nozzle 150 and the partial air nozzle 160, and is a diagram viewed from bottom to top of the deposit removal device 1 shown in Fig. 7. The wide-area air nozzle 150 has a plurality of ejection ports 151 arranged at regular intervals across the width direction W of the sheet member 100.

[0039] The wide-area air nozzle 150 is disposed downstream in the conveying direction H of the sheet member 100 from the position where the pressing member 140 is disposed. The outlet 151 of the wide-area air nozzle 150 is disposed at a position distance L1 away from the pressing member 140 in the conveying direction H as shown in Figures 7 and 8, and at a position distance T1 away from the sheet member 100 as shown in Figure 7. It is preferable that L1 is 5 mm or more and 30 mm or less, and T1 is 3 mm or more and 20 mm or less.

[0040] Air is sprayed from the nozzle 151 of the wide area air nozzle 150 toward the position of the sheet member 100 that is folded by the pressing member 140. The flow rate of the air sprayed from the wide area air nozzle 150 is preferably 200 L / min or more and 400 L / min or less.

[0041] The wide area air nozzle 150 blows air over at least the entire area where the ladder-shaped deposit 101 is attached, from one side to the other in the width direction W. It is preferable that the wide area air nozzle 150 blows air over an area in the width direction W that is wider than the area where the ladder-shaped deposit 101 is attached.

[0042] (Partial Air Nozzle 160) In this way, the deposits 101 are removed by the pressing member 140 and the wide-area air nozzle 150, but the two longitudinal deposits 101a extending in the longitudinal direction L, which are deposited in a ladder shape, may remain because they are in large quantities.

[0043] Therefore, the deposit removal device 1 of the embodiment further includes a partial air nozzle 160. The partial air nozzle 160 includes two partial air nozzles, a partial air nozzle 160a that blows air toward one side of the width direction W of the sheet member 100, and a partial air nozzle 160b that blows air toward the other side of the width direction W of the sheet member 100, each having an outlet 161. The width between the two outlets 161 is preferably 60 mm or more and 150 mm or less. The partial air nozzle 160a and the partial air nozzle 160b each blow air onto an area having a length of 15% or more and 25% or less of the sheet member 100.

[0044] The partial air nozzle 160, like the wide-area air nozzle 150, is disposed downstream in the conveying direction H of the sheet member 100 from the position where the pressing member 140 is disposed. The outlet 151 of the partial air nozzle 160 is also disposed at a position away from the pressing member 140 in the conveying direction H by a distance L1 and away from the sheet member 100 by a distance T1. L1 is preferably 5 mm or more and 30 mm or less, and T1 is preferably 3 mm or more and 20 mm or less. Air is ejected from the outlet 161 of the partial air nozzle 160 toward the position where the sheet member 100 is folded by the pressing member 140. The flow rate of air ejected from the partial air nozzle 160 is preferably 200 L / min or more and 400 L / min or less, like the wide-area air nozzle 150.

[0045] (Back side air nozzle 170) Furthermore, due to the tightening of the sheet member 100 on the payout roll 121, the deposit 101 may be transferred to the back surface of the sheet member 100, which is not coated with a release agent, because the deposit 101 contains a binder. The occurrence of transfer is particularly noticeable in the first 30 mm or so of the winding, which is close to the paper tube. If the sheet member 100 is transported with the deposit 101 transferred, the transferred deposit 101 may be scraped off and piled up at the pressing member 140, which may cause an obstacle to the pressing by the pressing member 140.

[0046] Therefore, the deposit removal device 1 of the embodiment further includes a back-side air nozzle 170 that blows air onto the back side of the sheet member 100 to blow off the transferred deposit 101. The back-side air nozzle 170 is preferably a nozzle that ejects air in a spiral shape, for example a patter gun.

[0047] The back side air nozzle 170 is disposed upstream of the pressing member 140 in the conveying direction H of the sheet member 100. In the embodiment, the back side air nozzle 170 is disposed so as to blow air near an inflection point where the trajectory of the sheet member 100 changes from the trajectory along the circumference of the pay-out roll 121 to a straight trajectory.

[0048] Furthermore, the distance between the back surface side air nozzle 170 and the position on the sheet member 100 where the air is blown becomes smaller in diameter as the sheet member is unwound from the unwinding roll 121. However, a driving unit (not shown) can move the nozzle so that the distance between the air blowing position and the position on the sheet member 100 where the air is blown remains constant regardless of the amount of sheet member 100 wound around the unwinding roll 121. Therefore, air can be blown onto the sheet member 100 at a constant wind speed and volume.

[0049] In this embodiment, the rear surface side air nozzle 170 has an air pressure of 0.5 MPa and an air amount of 110 L / min, and the removal speed of the deposit 101 is equivalent to 200 m / min. As a result of actually conducting an experiment using fine particles of 1.7 μm, 3.4 μm, and 3.35 μm, when the distance between the rear side air nozzle 170 and the sheet member 100 was 50 mm, it was possible to remove deposits of 1.7 μm, 3.4 μm, and 3.35 μm. When the distance between the rear side air nozzle 170 and the sheet member 100 was 100 mm, it was also possible to remove deposits of 1.7 μm, 3.4 μm, and 3.35 μm. When the distance between the rear side air nozzle 170 and the sheet member 100 was 150 mm, it was possible to remove deposits of 3.4 μm and 3.35 μm, but it was not possible to remove 1.7 μm. When the distance between the rear side air nozzle 170 and the sheet member 100 was 200 mm, it was not possible to remove any of the deposits of 1.7 μm, 3.4 μm, and 3.35 μm. Therefore, the distance between the rear surface side air nozzle 170 and the sheet member 100 is preferably 50 mm or more and 100 mm or less.

[0050] (Dust collection mechanism 180) The dust collection mechanism 180 includes a suction hood 181 arranged below the deposit removal unit 110, a SUS drum 182 connected to the suction hood 181, and a vacuum device 183 that sucks the inside of the suction hood 181 via the SUS drum 182. The deposits 101 peeled off from the sheet member 100 fall into the suction hood 181, are sucked up by the vacuum device 183, and are collected in the SUS drum 182.

[0051] According to the method for removing adhesions using the adhesion removal device 1 of the first embodiment, the sheet member 100 unwound from the unwound roll 121 is guided and transported by the auxiliary rolls 122 and 132 with the surface to which the adhesions 101 are attached facing downward, and is wound up by the winding roll 131 of the winding mechanism 130.

[0052] When the pressing member 140 is pressed against the sheet member 100 from the back surface side, the sheet member 100 is thin and therefore bends to follow the tip shape of the pressing member 140. On the other hand, the attachment 101 attached to the sheet member 100 is a ceramic green sheet in this embodiment and is thicker than the sheet member 100, so it is difficult to bend in the same way as the tip shape of the pressing member 140. Therefore, a gap is generated between the sheet member 100 and the attachment 101, and the attachment 101 peels off from the sheet member 100 and falls downward. In this manner, the attachment 101 is separated from the sheet member 100.

[0053] At this time, the width-direction deposits 101b among the deposits 101 are less likely to crack and are less likely to cause peeling even when pressed by the pressing member 140. However, the deposit removal device 1 of the embodiment is equipped with the wide-area air nozzle 150, and air is blown onto the width-direction deposits 101b, so that cracks can be more easily generated in the width-direction deposits 101b, and the removal efficiency of the deposits 101 is improved.

[0054] Furthermore, since the wide area air nozzle 150 blows air over a wide area in the width direction W, air can be blown evenly over the entire attachment 101 even if the sheet member 100 meanders.

[0055] Furthermore, air is further blown by the partial air nozzle 160 onto the two longitudinal attachments 101a that are attached in a ladder shape and extend in the longitudinal direction L, so that the longitudinal attachments 101a can also be removed more effectively.

[0056] Furthermore, according to the embodiment, a rear air nozzle 170 for blowing air is provided on the rear surface of the sheet member 100, so that the deposit 101 transferred to the rear surface of the sheet member 100 on which the release agent is not applied can be blown away. Therefore, the deposit 101 does not accumulate at the pressing member 140.

[0057] Then, the sheet member 100 from which the extraneous material 101 has been removed by the extraneous material removal device 1 is pulverized to form PET pellets, and the pellets are recycled as the sheet member 100, thereby providing a method for recycling the sheet member 100.

[0058] Furthermore, the slurry that becomes the ceramic green sheet is applied in a sheet shape on the sheet member 100 thus reproduced. Next, an electrode pattern is printed on the surface of the sheet member 100 on which the ceramic green sheet is applied in a sheet shape. Then, the ceramic green sheet on which the electrode pattern is printed is cut into a rectangle, and is peeled off from the sheet member 100 using a sheet peeling device 200. The peeled ceramic green sheets 101c are stacked to form a mother block laminate 210. The mother block laminate 210 is cut to a predetermined size to obtain a plurality of laminate chips 220. Thereafter, the laminate chip 220 is fired, and an external electrode 310 is formed on the outer surface, thereby providing a manufacturing method for manufacturing a multilayer ceramic capacitor 300 as an electronic component.

[0059] Second embodiment 9 is a diagram illustrating an adhesion removal device 2 of the second embodiment. Unlike the adhesion removal device 2 of the first embodiment, the adhesion removal device 2 is not provided with a pressing member and an air nozzle, but is provided with a pressing blade member 20. Since the other parts are similar to those of the first embodiment, the same reference numerals as those of the first embodiment are used for the similar parts, and the description thereof will be omitted.

[0060] (Pressing blade member 20) The pressing blade member 20 extends along the blade axis A and has a blade tip 21 that is curved in a cross section perpendicular to the blade axis A. Fig. 10 is a perspective view of the blade tip 21 at the tip of the pressing blade member 20. The curved shape of the blade tip 21 is, for example, a circular arc or an elliptical arc.

[0061] 11 is a diagram for explaining the position of the pressing blade member 20 relative to the sheet member 100. As shown in the figure, a plurality of pressing blade members 20 are arranged in a line in the width direction W of the sheet member 100. The rows of the pressing blade members 20 arranged in a line in the width direction W are respectively arranged at a plurality of different positions in the conveying direction H. The rows of the pressing blade members 20 are arranged in two different positions, a front row 20A arranged at a position H1 in the conveying direction from the upstream side to the downstream side in the conveying direction H, and a rear row 20B arranged at a position H2 in the conveying direction.

[0062] Moreover, the blade axis A is disposed in a state inclined at a contact angle θ2 with respect to the sheet member 100 as shown in Fig. 9. The contact angle θ2 is preferably 10° or more and 20° or less.

[0063] The pressing blade members 20 in the rear row 20B are arranged so that their centers in the width direction W are located downstream in the conveying direction H of positions in the width direction W between adjacent pressing blade members 20 in the front row 20A. In addition, in the width direction W, the region where the pressing blade members 20 in the front row 20A press the sheet member 100 and the region where the pressing blade members 20 in the rear row 20B press the sheet member 100 partially overlap. In other words, the blade edges 21 of the pressing blade members 20 in the front row 20A and the blade edges 21 of the pressing blade members 20 in the rear row 20B press the sheet member 100 in regions that partially overlap in the width direction W.

[0064] Moreover, the blade axis A is disposed at a slight angle α with respect to the conveying direction H of the sheet member 100 as shown in FIG.

[0065] According to the adhesion removal method using the adhesion removal device 2 of the second embodiment, the sheet member 100 unwound from the unwound roll 121 is guided and transported by the auxiliary rolls 122 and 132 with the surface to which the adhesion 101 is attached facing downward, and is wound up onto the winding roll 131 of the winding mechanism 130.

[0066] During transport from when the sheet material 100 is unwound from the unwound roll 121 of the unwound mechanism 120 to when it is wound up by the winding roll 131 of the winding mechanism 130, the pressing blade member 20 presses the surface of the sheet material 100 with the blade tip 21 with the blade axis A aligned with the transport direction H of the sheet material 100 and inclined at an angle θ2 perpendicular to the sheet material 100.

[0067] A predetermined tension is applied to the sheet member 100, and when the cutting blade 203 is pressed against the sheet member 100, the sheet member 100 is curved along the shape of the cutting blade 203. Then, the attached matter 101 on the sheet member 100 is chipped off by the blade edge 21 of the pressing blade member 20 and peeled off.

[0068] At this time, when the cutting edge 21 presses against the sheet member 100, the sheet member 100 curves following the curved shape of the cutting edge 21, so that the cutting edge 21 bites into the sheet member 100 and can efficiently peel off the deposits 101. In addition, because the cutting edge 21 is curved, the sheet member 100 is less likely to be damaged compared to a straight blade.

[0069] At this time, for example, among the width-wise adhesions 101b, those that pass between the pressing blade members 20 arranged in the width direction W in the front row 20A may not be sufficiently cut off by the pressing blade members 20 in the front row 20A and may remain.

[0070] However, the pressing blade members 20 in the rear row 20B are disposed downstream in the conveying direction H of the positions in the width direction W between the pressing blade members 20 adjacent to each other in the front row 20A. Therefore, of the width-direction deposits 101b, those that pass between the pressing blade members 20 arranged in the width direction W in the front row 20A and remain without being cut off are cut off by the pressing blade members 20 in the rear row 20B. Therefore, the deposits 101 can be sufficiently removed.

[0071] If the contact angle θ2 between the sheet member 100 and the cutting edge 21 of the pressing blade member 20 is greater than 20°, it is difficult to smoothly peel off the deposit 101, and the cutting edge 21 may get caught on the deposit 101 and be damaged. If it is less than 10°, a portion of the pressing blade member 20 other than the cutting edge 21 may come into contact with the sheet member 100 and interfere with the conveyance of the sheet member 100. However, since the blade axis A of the embodiment is disposed in a state inclined at a contact angle θ2 of 10° or more and 20° or less with respect to the sheet member 100, this does not occur.

[0072] 11, with respect to the conveying direction H of the sheet material 100. Therefore, damage to the sheet material 100 caused by cut marks is prevented.

[0073] 12 is a diagram illustrating a state in which the pressing blade member 20 peels off the adhesion 101 when the adhesion 101 is attached to the entire surface of the sheet member 100. According to the adhesion removal device 2 of the second embodiment, not only the ladder-shaped adhesion 101 but also the adhesion 101 attached to the entire surface of the sheet member 100 as shown in FIG.

[0074] Then, the sheet member 100 from which the extraneous material 101 has been removed by the extraneous material removal device 2 is pulverized to form PET pellets, and the pellets are recycled as the sheet member 100, thereby providing a method for recycling the sheet member 100.

[0075] Furthermore, the slurry that becomes the ceramic green sheet is applied in a sheet form on the sheet member 100 thus reproduced. Next, an electrode pattern is printed on the surface of the sheet member 100 on which the ceramic green sheet is applied in a sheet form. Then, the ceramic green sheet on which the electrode pattern is printed is cut into a rectangle, and peeled off from the sheet member 100 using a sheet peeling device 200. The peeled ceramic green sheets 101c are stacked to form a mother block laminate 210. The mother block laminate 210 is cut to a predetermined size to obtain a plurality of laminate chips 220. Thereafter, an external electrode 310 is formed on the outer surface of the laminate chip 220, thereby providing a manufacturing method for manufacturing a multilayer ceramic capacitor 300 as an electronic component.

[0076] Although the preferred embodiments of the present invention have been described above, the present invention also includes the following combinations. <1> an apparatus for removing adhesions from a sheet member, comprising: a payout mechanism for paying out a long sheet member; a winding mechanism for winding up the sheet member paid out by the payout mechanism; a pressing member for pressing the back side of the sheet member and bending the front side of the sheet member so that it becomes convex between the time when the sheet member is paid out by the payout mechanism and the time when the sheet member is wound up by the winding mechanism; a back side air nozzle for blowing air onto the back side of the sheet member, upstream of the pressing member in the conveying direction of the sheet member; and a dust collection mechanism for collecting adhesions peeled off from the sheet member.

[0077] <2> the pay-out mechanism includes a pay-out roll on which the sheet material is wound, and the back-side air nozzle has a variable blow-out position such that a distance between the air blow-out position and the sheet material onto which the air is blown by the back-side air nozzle is constant regardless of an amount of the sheet material wound on the pay-out roll. <1> The deposit removal device according to claim 1 .

[0078] <3> The air is jetted in a spiral shape from the rear surface side air nozzle. <1> or <2> The deposit removal device according to claim 1 .

[0079] <4> A method for removing adhesions from a sheet member, comprising: unrolling a long sheet member having adhesions on its surface; blowing air onto the back side of the sheet member using a back-side air nozzle to remove the adhesions transferred from the front side to the back side; pressing the sheet member from the back side with a pressing member and folding the sheet member so that the front side of the sheet member is convex, thereby peeling off the adhesions from the front side of the sheet member; peeling the adhesions off from the sheet member and collecting them; and rolling up the sheet member from which the adhesions have been peeled off.

[0080] <5> A method for recycling a sheet member, comprising: unrolling a long sheet member having adhesions on its surface; blowing air onto the back side of the sheet member using a back-side air nozzle to remove the adhesions transferred from the front side to the back side; pressing the unrolled sheet member from the back side with a pressing member to fold the sheet member so that the front side of the sheet member is convex, thereby peeling off the adhesions from the front side of the sheet member; peeling off the adhesions from the sheet member and collecting the adhesions; winding up the sheet member from which the adhesions have been peeled off; and pulverizing the sheet member from which the adhesions have been removed to form pellets.

[0081] <6> a back-side air nozzle blowing air onto a back side of the sheet member to remove the adhesions transferred from the front side to the back side, pressing the back side of the sheet member with a pressing member to fold the sheet member so that the front side of the sheet member is convex, thereby peeling off the adhesions from the front side of the sheet member, peeling off the adhesions from the sheet member and collecting the adhesions, winding up the sheet member from which the adhesions have been peeled off, crushing the sheet member from which the adhesions have been removed to form pellets, using the pellets to regenerate the long sheet member, forming a ceramic green sheet on the regenerated sheet member, and using the ceramic green sheet to manufacture an electronic component. [Explanation of symbols]

[0082] θ1 Bending angle θ2 Contact angle A Blade axis 1,2 Deposit removal device 2 Deposit removal device 20 Pressing blade member 20A front row 20B back row 21 Cutting Edge 100 Sheet member 101 Attachment 101a Longitudinal deposits 101b Width direction deposits 101c Ceramic Green Sheet 110 Deposit removal section 120 Payout mechanism 121 Payout roll 122 Brake 122 Auxiliary Roll 130 Winding mechanism 131 Winding roll 132 Auxiliary Roll 140 Pressing member 150 Wide Area Air Nozzle 151 spout 160, 160a, 160b Partial air nozzle 161 spout 170 Back side air nozzle 180 Dust collection mechanism 200 Sheet peeling device 300 Multilayer ceramic capacitors

Claims

1. A feeding mechanism that feeds out a long sheet member; a winding mechanism that winds up the sheet member that has been unwound by the unwinding mechanism; a pressing member that presses the back surface of the sheet member from the time the sheet member is unwound by the unwound mechanism and is wound up by the winding mechanism, and bends the sheet member so that the front surface side of the sheet member is convex; At an upstream side of the pressing member in the conveying direction of the sheet member, a back side air nozzle that blows air onto the back side of the sheet member; a dust collection mechanism that collects the deposits peeled off from the sheet member; Equipped with the unwinding mechanism includes a unwinding roll around which the sheet member is wound, The back side air nozzle is Air is blown to an inflection point where a conveying direction of the sheet member changes from a path along a circumference of a delivery roll that delivers the sheet member to a straight path; The device for removing adhesions from a sheet material is capable of varying the air blowing position so that the distance between the air blowing position and the sheet material onto which air is blown by the back-side air nozzle is constant regardless of the amount of the sheet material wound around the pay-out roll.

2. The air is jetted in a spiral shape from the rear surface side air nozzle. The deposit removal device according to claim 1 .

3. A long sheet member having a deposit on its surface is paid out from a payout roll, At an inflection point on the back side of the sheet member where the conveying direction of the sheet member changes from a path along the circumference of a pay-out roll that pays out the sheet member to a straight path, air is blown by a back-side air nozzle while changing the blow-out position so that the distance between the air blow-out position and the sheet member to which the air is blown is constant regardless of the amount of the sheet member wound around the pay-out roll, thereby removing any deposits transferred from the front side to the back side; The sheet member is pressed from the back surface side by a pressing member, and folded so that the front surface side of the sheet member is convex, thereby peeling off the attached matter on the front surface of the sheet member; The attached matter is peeled off from the sheet member and collected; winding up the sheet member from which the deposit has been peeled off; A method for removing deposits from a sheet member.

4. A long sheet member having a deposit on its surface is paid out from a payout roll, At an inflection point on the back side of the sheet member where the conveying direction of the sheet member changes from a path along the circumference of a pay-out roll that pays out the sheet member to a straight path, air is blown by a back-side air nozzle while changing the blow-out position so that the distance between the air blow-out position and the sheet member to which the air is blown is constant regardless of the amount of the sheet member wound around the pay-out roll, thereby removing any deposits transferred from the front side to the back side; The sheet member is pressed from the back side by a pressing member, and the front side of the sheet member is folded so as to be convex, thereby peeling off the deposits on the front side of the sheet member; The attached matter is peeled off from the sheet member and collected; The sheet member from which the deposit has been peeled off is wound up; The sheet member from which the deposits have been removed is pulverized to form pellets. A method for recycling sheet materials.

5. A long sheet member having a deposit on its surface is paid out from a payout roll, At an inflection point on the back side of the sheet member where the conveying direction of the sheet member changes from a path along the circumference of a pay-out roll that pays out the sheet member to a straight path, air is blown by a back-side air nozzle while changing the blow-out position so that the distance between the air blow-out position and the sheet member to which the air is blown is constant regardless of the amount of the sheet member wound around the pay-out roll, thereby removing any deposits transferred from the front side to the back side; The sheet member is pressed from the back side by a pressing member, and the front side of the sheet member is folded so as to be convex, thereby peeling off the deposits on the front side of the sheet member; The attached matter is peeled off from the sheet member and collected; The sheet member from which the deposit has been peeled off is wound up; The sheet member from which the deposits have been removed is pulverized to form pellets; Regenerating a long sheet member using the pellets; forming a ceramic green sheet on the recycled sheet member; Manufacturing an electronic component using the ceramic green sheet. A method for manufacturing electronic components.

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