Apparatus for removing deposits, method for removing deposits, method for recycling sheet members, and method for manufacturing 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 wind area air nozzle 150 which blows air from a downstream side in a transport direction of the sheet member 100 toward the front surface side of the folded sheet member 100 in an area, which ranges from one side to the other side as seen in a width direction, of the sheet member 100; partial air nozzles 160 which respectively blow air to the one side and the other side as seen in the width direction of the sheet member 100; 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 deposits, a method for removing deposits, a method for recycling sheet members, and a method for manufacturing electronic components. [Background technology]

[0002] In electronic components such as multilayer ceramic capacitors, a plurality of ceramic green sheets are stacked one on top of another. To improve ease of handling, the ceramic green sheets are backed with a sheet material 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 then pelletized and reused. Conventionally, a method of removing attachments on such sheet members has been used in which the sheet members are washed with an organic solvent (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-291690 Summary of the Invention [Problem to be solved by the invention]

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

[0006] The present invention aims to provide an apparatus and method for removing deposits that can safely and easily remove deposits, 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 an apparatus for removing deposits from a sheet member, comprising: a payout mechanism that pays out a long sheet member; a winding mechanism that winds up the sheet member paid out by the payout mechanism; a pressing member that presses the sheet member from the back side and folds the sheet member so that the front side of the sheet member is convex between when it is paid out by the payout mechanism and when it is wound up by the winding mechanism; a wide-area air nozzle that blows air toward the front side of the folded sheet member from the downstream side in the conveying direction of the sheet member, in an area spanning from one side to the other in the width direction of the sheet member; a partial air nozzle that blows air toward each of the one side and the other in the width direction of the sheet member; and a dust collection mechanism that collects deposits that have 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 comprises: unwinding a long sheet member having adhesions on its surface; 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; blowing air from a wide-area air nozzle toward the front side of the folded sheet member from the downstream side in the conveying direction of the sheet member, in an area spanning from one side to the other in the width direction of the sheet member; and blowing air from a partial air nozzle toward each of the one side and the other in the width direction of the sheet member, thereby peeling the adhesions from the sheet member; collecting the adhesions peeled from the sheet member; and winding up the sheet member from which the adhesions have been peeled.

[0009] Furthermore, the present invention provides a method for recycling a sheet member, comprising: unwinding a long sheet member having attachments on its surface; pressing the unwound sheet member from the back side with a pressing member to fold the sheet member so that the front side is convex; blowing air from a wide-area air nozzle toward the front side of the folded sheet member from the downstream side in the conveying direction of the sheet member, in an area spanning from one side in the width direction of the sheet member to the other; and blowing air from a partial air nozzle toward each of the one side and the other side in the width direction of the sheet member, thereby peeling the attachments from the sheet member; collecting the attachments peeled from the sheet member; winding up the sheet member from which the attachments have been peeled; and pulverizing the sheet member from which the attachments have been removed to form pellets.

[0010] In addition, the present invention provides a method for feeding out a long sheet member having an attachment on its surface, The method for manufacturing an electronic component includes pressing the unwound sheet member from the back side with a pressing member to fold the sheet member so that the front side is convex, blowing air from a wide-area air nozzle toward the front side of the folded sheet member from the downstream side in the conveying direction of the sheet member to an area spanning from one side in the width direction of the sheet member to the other, and also blowing air from a partial air nozzle toward each of the one side and the other side in the width direction of the sheet member, thereby peeling the attachments from the sheet member, collecting the attachments peeled from the sheet member, winding up the sheet member from which the attachments have been peeled, pulverizing the sheet member from which the attachments 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. [Effects of the Invention]

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

[0012] [Figure 1] 1 is a diagram showing an attachment removal device 1 of a first embodiment. [Figure 2] 1 is a diagram showing a sheet member 100 from which an adhering substance 101 is removed by an adhering substance removal device 1. FIG. [Figure 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. [Figure 5] FIG. 10 is a diagram showing a part of the sheet peeling device 200 in a state where the peeling roll 202 has retreated 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 an adhering matter removal unit 110 of the adhering matter removal device 1 of the first embodiment. FIG. [Figure 8] 3 is a diagram illustrating 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. FIG. [Figure 9] FIG. 2 is a diagram showing an attachment removal device 2 according to a second embodiment. [Figure 10] FIG. 10 is a perspective view of a cutting edge 21 at the tip of a pressing blade member 20 of a second embodiment. [Figure 11] 10 is a diagram illustrating the position of a pressing blade member 20 relative to a sheet member 100 in a second embodiment. FIG. [Figure 12] 10 is a diagram illustrating a state in which a pressing blade member 20 according to a second embodiment peels off an adhering matter 101 adhering to the entire surface of a sheet member 100. FIG. DETAILED DESCRIPTION OF THE INVENTION

[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 the 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 onto 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 include 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 regular intervals in the longitudinal direction L between the two longitudinal attachments 101a.

[0016] The reason why deposits 101 are attached to sheet member 100 in a ladder-like pattern will now be described. Sheet member 100 is used in an intermediate process for manufacturing a multilayer electronic component such as multilayer ceramic capacitor 300. FIG. 3 is a diagram showing multilayer ceramic capacitor 300 fabricated using sheet member 100. 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 containing dielectric ceramic powder, a binder, a solvent, etc., which will become a ceramic green sheet, 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 of the cutting region A1 in the conveyance direction H.

[0021] The sheet member 100, which holds a ceramic green sheet on its surface on which an electrode pattern is printed, is transported by transport rolls 201 onto a cutting stage 204 in cutting region A1. There, a 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. Note that, since it is difficult to cut out only the ceramic green sheet from the sheet member 100, a portion 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 region A1 to the peeling region A2. In the peeling region A2, the peeling head 205 descends, and the ceramic green sheet 101c, which has been cut into a rectangle and on which an electrode pattern is printed, is sucked by the peeling head 205. When the ceramic green sheet 101c cut into a rectangle is sucked and peeled off from the sheet member 100, ladder-shaped residue of the ceramic green sheet remains on the sheet member 100 as the attachment 101, as shown in FIG. 2. This is the reason why the attachment 101 is attached to the sheet member 100 in a ladder-like manner.

[0023] (d) When the ceramic green sheet 101c cut into a rectangular shape 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 rectangles 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 rectangles. The mother block laminate 210 formed by stacking a predetermined number of ceramic green sheets 101c is cut to a predetermined size, resulting in a plurality of laminate chips 220. Thereafter, external electrodes 310 are formed on the outer surfaces of the laminate chips 220, thereby producing a multilayer ceramic capacitor 300 as shown in FIG. 3. 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 ladder-like deposits 101 is removed, and then pulverized to form PET pellets that are the raw material for the sheet member 100. The pellets are recycled as the sheet member 100, and the above-mentioned steps from (a) onwards are repeated.

[0026] (Deposition removal device 1) Next, a description will be given of an embodiment of an attachment removal device 1 and an attachment removal method for removing attachment 101 from a sheet member 100. Returning to FIG. 1, the attachment removal device 1 includes an attachment removal unit 110 and a dust collection mechanism 180.

[0027] (Deposition removal section 110) 7 is a diagram illustrating the deposit removal unit 110. The deposit removal unit 110 includes a feeding mechanism 120 that feeds out the sheet member 100, a winding mechanism 130 that winds up the sheet member 100 fed out by the feeding mechanism 120, a pressing member 140 that presses the sheet member 100 from the back side and bends the front side of the sheet member 100 so that it becomes convex between when it is fed out by the feeding mechanism 120 and when it 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 to both sides of the sheet member 100 in the width direction W.

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

[0029] The deposit removal unit 110 also includes an ionizer 191 and a removal sensor 192 located downstream of the pressing member 140 in the conveyance direction H. The ionizer 191 prevents the deposits 101 removed by the back-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 deposits 101.

[0030] (feeding mechanism 120) The unwinding mechanism 120 includes a unwinding roll 121, and a brake 123 is attached to the central shaft of the unwinding roll 121 to apply tension to the sheet material 100. The long sheet material 100 having the above-mentioned deposits 101 attached thereto in a ladder-like pattern 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 so that the surface having the deposits 101 attached thereto faces the inner diameter side, and is unwound so that this surface faces downward.

[0031] (Take-up mechanism 130) The winding mechanism 130 includes a winding roll 131, and the 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, thereby conveying the sheet member 100 at a constant tension and a constant conveying speed. In this embodiment, the conveying 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 fed from the feed 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 then wound up by the winding roll 131 of the winding mechanism 130.

[0033] (Pressing member 140) In this embodiment, the pressing member 140 is a pressing blade with 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 this 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 shape of the tip of the pressing member 140. On the other hand, the deposit 101 adhering to the sheet member 100 is a ceramic green sheet in this embodiment, and is therefore less likely to bend in the same way as the shape of the tip of the pressing member 140. Furthermore, because a release agent is applied to the surface of the sheet member 100, a gap is created 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 way, 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. Also, 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, making it 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, and therefore is less likely to crack when pressed by the pressing member 140, and is less likely to form a trigger for peeling. Therefore, the deposit removal device 1 of the embodiment is provided with a wide-area air nozzle 150 to make it easier to peel off the width-direction deposit 101b.

[0038] Figure 8 is a diagram illustrating the positions of the wide-area air nozzle 150 and the partial air nozzle 160, and is a bottom-up view of the deposit removal device 1 shown in Figure 7. The wide-area air nozzle 150 has a plurality of air outlets 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 a distance L1 away from the pressing member 140 in the conveying direction H as shown in Figures 7 and 8, and at a position a distance T1 away from the sheet member 100 as shown in Figure 7. It is preferable that L1 be 5 mm or more and 30 mm or less, and T1 be 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 bent 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 deposits 101 are 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 deposits 101 are 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 that are attached in a ladder-like pattern and extend in the longitudinal direction L 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 160: 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] Similar to the wide-area air nozzle 150, the partial air nozzle 160 is disposed downstream in the conveyance 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 distance L1 in the conveyance direction H from the pressing member 140 and a distance T1 from the sheet member 100. 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. Furthermore, air is sprayed from the outlet 161 of the partial air nozzle 160 toward the position of the sheet member 100 that is bent by the pressing member 140. Similar to the wide-area air nozzle 150, the flow rate of air sprayed from the partial air nozzle 160 is preferably 200 L / min or more and 400 L / min or less.

[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. This transfer occurs particularly noticeably in the first 30 mm or so of the winding, close to the paper tube. If the sheet member 100 is transported with the deposit 101 still transferred, the transferred deposit 101 may be scraped off and piled up at the pressing member 140, which may interfere with 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 away the transferred deposits 101. The back-side air nozzle 170 is preferably a nozzle that sprays air in a spiral shape, such as 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 this embodiment, the back-side air nozzle 170 is disposed so as to blow air near the inflection point where the path of the sheet member 100 changes from the path along the circumference of the payout roll 121 to a linear path.

[0048] Furthermore, the distance between the back surface side air nozzle 170 and the position on the sheet material 100 where the air is blown becomes smaller as the sheet material 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 material 100 where the air is blown remains constant, regardless of the amount of sheet material 100 wound around the unwinding roll 121. Therefore, air can be blown onto the sheet material 100 at a constant air 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 deposits 101 is equivalent to 200 m / min. In actual experiments 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. Similarly, when the distance between the rear-side air nozzle 170 and the sheet member 100 was 100 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 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 deposits of 1.7 μm, 3.4 μm, or 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 by the vacuum device 183, and are collected in the SUS drum 182.

[0051] According to the method for removing deposits using the deposit 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 with the deposits 101 facing downward, and is then 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 side, the sheet member 100 is thin and therefore bends to follow the shape of the tip 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, which is thicker than the sheet member 100, and is therefore less likely to bend in the same way as the shape of the tip of the pressing member 140. Therefore, a gap is created between the sheet member 100 and the attachment 101, causing the attachment 101 to peel off from the sheet member 100 and fall downward. In this way, 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 form a trigger for 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, which makes it easier for cracks to form in the width-direction deposits 101b, thereby improving the removal efficiency of the deposits 101.

[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 deposit 101 even if the sheet member 100 meanders.

[0055] Furthermore, the partial air nozzle 160 further blows air onto the two longitudinal deposits 101a that are attached in a ladder shape and extend in the longitudinal direction L, so that the longitudinal deposits 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 deposits 101 transferred to the rear surface of the sheet member 100 that is not coated with the release agent can be blown away. Therefore, the deposits 101 do not accumulate at the pressing member 140.

[0057] Then, the sheet member 100 from which the adhering matter 101 has been removed by the adhering matter removal device 1 is crushed 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, a slurry that will become a ceramic green sheet is applied in sheet form to the sheet member 100 thus recycled. Next, an electrode pattern is printed on the surface of the sheet member 100 on which the ceramic green sheet is applied in sheet form. The ceramic green sheet on which the electrode pattern is printed is then 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, the laminate chips 220 are fired, and external electrodes 310 are formed on the outer surfaces, thereby providing a manufacturing method for a multilayer ceramic capacitor 300 as an electronic component.

[0059] (Second embodiment) 9 is a diagram illustrating an attachment removal device 2 according to a second embodiment. Unlike the attachment removal device 2 according to the first embodiment, the attachment removal device 2 is not provided with a pressing member or an air nozzle, but is provided with a pressing blade member 20. As the other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals as in the first embodiment, and description thereof will be omitted.

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

[0061] 11 is a diagram illustrating 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 side by side in the width direction W of the sheet member 100. The rows of the pressing blade members 20 arranged side by side in the width direction W are also arranged at different positions in the conveying direction H. The rows of the pressing blade members 20 are arranged at two different locations, a front row 20A arranged at 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 position H2 in the conveying direction.

[0062] 9, the blade axis A is disposed in a state inclined at a contact angle θ2 with respect to the sheet member 100. 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 area where the pressing blade members 20 in the front row 20A press the sheet material 100 and the area where the pressing blade members 20 in the rear row 20B press the sheet material 100 partially overlap. In other words, the cutting edges 21 of the pressing blade members 20 in the front row 20A and the cutting edges 21 of the pressing blade members 20 in the rear row 20B press the sheet material 100 in areas 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 method for removing adhesions 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 with the adhesions 101 facing downward, and is then wound up onto the winding roll 131 of the winding mechanism 130.

[0066] During the transport of the sheet material 100 from the unwinding roll 121 of the unwinding mechanism 120 to the winding roll 131 of the winding mechanism 130, the pressing blade member 20 presses the surface of the sheet material 100 with the cutting edge 21 while the blade axis A is aligned with the transport direction H of the sheet material 100 and tilted 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 curves along the shape of the cutting blade 203. Then, the deposit 101 on the sheet member 100 is cut away by the cutting 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 to follow 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 than with a straight blade.

[0069] At this time, for example, among the widthwise 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 of the rear row 20B are arranged downstream in the conveying direction H of the positions in the width direction W between the adjacent pressing blade members 20 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 of 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 deposits 101, and the cutting edge 21 may get caught on the deposits 101 and be damaged. If the contact angle θ2 is less than 10°, portions of the pressing blade member 20 other than the cutting edge 21 may come into contact with the sheet member 100, hindering the conveyance of the sheet member 100. However, this does not occur because the blade axis A of the embodiment is disposed in a state inclined with respect to the sheet member 100 at a contact angle θ2 of 10° or more and 20° or less.

[0072] The blade axis A is disposed at a slight angle α, as shown in Fig. 11, with respect to the conveyance 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 deposit 101 when the deposit 101 is attached to the entire surface of the sheet member 100. The deposit removal device 2 of the second embodiment can effectively remove not only ladder-shaped deposits 101 but also deposits 101 attached to the entire surface of the sheet member 100 as shown in FIG.

[0074] Then, the sheet member 100 from which the adhering matter 101 has been removed by the adhering matter removal device 2 is crushed 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, a slurry that will become a ceramic green sheet is applied in sheet form to the sheet member 100 thus recycled. Next, an electrode pattern is printed on the surface of the sheet member 100 on which the ceramic green sheet is applied in sheet form. The ceramic green sheet on which the electrode pattern is printed is then cut into a rectangle and peeled 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, external electrodes 310 are formed on the outer surfaces of the laminate chips 220, thereby providing a manufacturing method for manufacturing a multilayer ceramic capacitor 300 as an electronic component.

[0076] The preferred embodiments of the present invention have been described above, but the present invention also includes the following combinations. <1> a pressing member that presses the back surface of the sheet material and bends the sheet material so that the front surface side of the sheet material is convex between when the sheet material is unwound by the unwound mechanism and when it is wound up by the winding mechanism; a wide-area air nozzle that blows air toward the front surface side of the folded sheet material from the downstream side in the conveying direction of the sheet material, over an area spanning from one side to the other in the width direction of the sheet material; a partial air nozzle that blows air toward each of the one side and the other in the width direction of the sheet material; and a dust collection mechanism that collects deposits that have peeled off from the sheet material.

[0077] <2> The partial air nozzles are provided on the one side and the other side, and each of the partial air nozzles blows air onto an area having a length of 15% or more and 25% or less of the width of the sheet member. <1> The deposit removal device according to claim 1.

[0078] <3> a rear-side air nozzle that blows air onto the rear side of the sheet member, the rear-side air nozzle being located upstream of the pressing member in the conveying direction of the sheet member; <1> or <2> The deposit removal device according to claim 1.

[0079] <4> the feeding mechanism includes a feeding roll on which the sheet material is wound, and the rear-side air nozzle has a variable blowing position so that the distance between the air blowing position and the sheet material onto which the air is blown by the rear-side air nozzle is constant regardless of the amount of the sheet material wound on the feeding roll. <3> The deposit removal device according to claim 1.

[0080] <5> The air is ejected in a spiral shape from the rear surface side air nozzle. <3> or <4> The deposit removal device according to claim 1. Furthermore, the sheet peeling device 200 and the deposit removing unit 110 may be mounted integrally on the same equipment.

[0081] <6> A method for removing adhesions from a sheet member, comprising: unwinding a long sheet member having adhesions on its surface; pressing the unwound sheet member from the back side with a pressing member to fold the sheet member so that the front side is convex; blowing air from a wide-area air nozzle toward the front side of the folded sheet member from the downstream side in the conveying direction of the sheet member, in an area spanning from one side to the other in the width direction of the sheet member; and blowing air from a partial air nozzle toward each of the one side and the other in the width direction of the sheet member, thereby peeling the adhesions from the sheet member; collecting the adhesions peeled from the sheet member; and winding up the sheet member from which the adhesions have been peeled.

[0082] <7> a wide-area air nozzle blowing air toward the front surface of the folded sheet member from the downstream side in the conveying direction of the sheet member, in an area spanning from one side to the other in the width direction of the sheet member; and a partial air nozzle blowing air toward each of the one side and the other in the width direction of the sheet member, thereby peeling the adhesions from the sheet member; collecting the adhesions peeled from the sheet member; winding up the sheet member from which the adhesions have been peeled; and pulverizing the sheet member from which the adhesions have been removed to form pellets.

[0083] <8> a wide-area air nozzle blowing air toward the front surface of the folded sheet member from a downstream side in a conveyance direction of the sheet member, in a region spanning from one end of the width direction of the sheet member to the other, and a partial air nozzle blowing air toward each of the one end and the other end of the width direction of the sheet member, thereby peeling the attachment from the sheet member, collecting the attachment peeled from the sheet member, winding up the sheet member from which the attachment has been peeled, pulverizing the sheet member from which the attachment has 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]

[0084] 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 Attachments 101a Longitudinal deposits 101b Width direction deposits 101c ceramic green sheet 110 Deposit removal section 120 Feeding 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 Capacitor

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 sheet member from a back surface side and bends the sheet member so that the front surface side of the sheet member is convex during the period from when the sheet member is unwound by the unwound mechanism to when the sheet member is wound up by the winding mechanism; From the downstream side in the conveyance direction of the sheet member toward the front side of the folded sheet member, a wide-area air nozzle that blows air onto an area spanning from one side to the other in the width direction of the sheet member; partial air nozzles that are arranged at each of the one end and the other end in the width direction of the sheet member so as to overlap with the wide area nozzles and that blow air parallel to the conveyance direction toward each of the one end and the other end in the width direction of the sheet member; a dust collection mechanism that collects the deposits that have peeled off from the sheet member; An apparatus for removing deposits from a sheet member, comprising:

2. the partial air nozzles are provided on the one side and the other side, and each of the partial air nozzles blows air onto an area having a length of 15% to 25% of the width of the sheet member; The deposit removal device according to claim 1 .

3. On the upstream side of the pressing member in the conveying direction of the sheet member, a rear-side air nozzle for blowing air onto the rear side of the sheet member; The deposit removal device according to claim 1 .

4. The unwinding mechanism includes a unwinding roll around which the sheet material is wound, and regardless of the amount of the sheet material wound around the unwinding roll, the rear surface side air nozzle has a variable blowing position so that the distance between the air blowing position and the sheet member onto which the air is blown by the rear surface side air nozzle is constant; The deposit removal device according to claim 3.

5. The air is ejected in a spiral shape from the rear surface side air nozzle. The deposit removal device according to claim 3.

6. A long sheet member having a deposit on its surface is fed out, The sheet member thus fed 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; From the downstream side in the conveyance direction of the sheet member toward the front side of the folded sheet member, Air is blown onto an area of ​​the sheet member from one side to the other in the width direction by a wide-area air nozzle, a partial air nozzle blowing air parallel to a conveyance direction onto each of the one and the other sides in the width direction of the sheet member, thereby peeling off the deposits from the sheet member; collecting the deposits that have peeled off from the sheet member; winding up the sheet member from which the adhering matter has been peeled off; A method for removing deposits from a sheet member.

7. A long sheet member having a deposit on its surface is fed out, The sheet member thus fed 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; From the downstream side in the conveyance direction of the sheet member toward the front side of the folded sheet member, Air is blown onto an area of ​​the sheet member from one side to the other in the width direction by a wide-area air nozzle, blowing air parallel to a conveyance direction by partial air nozzles onto each of the one and the other sides in the width direction of the sheet member, thereby peeling off the adhering matter from the sheet member; collecting the deposits that have peeled off from the sheet member; The sheet member from which the deposits have been removed is wound up. The sheet member from which the deposits have been removed is pulverized to form pellets. A method for recycling sheet materials.

8. A long sheet member having a deposit on its surface is fed out, The sheet member thus fed 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; From the downstream side in the conveyance direction of the sheet member toward the front side of the folded sheet member, Air is blown onto an area of ​​the sheet member from one side to the other in the width direction by a wide-area air nozzle, blowing air parallel to a conveyance direction by partial air nozzles onto each of the one and the other sides in the width direction of the sheet member, thereby peeling off the adhering matter from the sheet member; collecting the deposits that have peeled off from the sheet member; The sheet member from which the deposits have been removed 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; An electronic component is manufactured using the ceramic green sheet. Manufacturing methods for electronic components.

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