Method for manufacturing recycled substrate

Abstract

To prevent a joint material from remaining on an inner peripheral surface of a recycled substrate, compared to a case of providing only a process of separating a support body and a process of removing a coating film.SOLUTION: A method for manufacturing a recycled substrate comprises: separating a support body from a cylindrical substrate that has a coating film formed on an outer peripheral surface and to which the support body is attached to its end part by a joint material of an end portion of an inner peripheral surface; rotating the substrate around an axis, and spraying liquid ejected from a nozzle onto the end portion to remove the joint material; and supporting the substrate without contacting the inner peripheral surface from which the joint material has been removed, and removing the coating film from the outer peripheral surface.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a regenerated substrate.

Background Art

[0002] Patent Document 1 describes a method for regenerating an electrophotographic photoreceptor including a photoreceptor drum having a photosensitive layer formed on the surface of a cylindrical conductive substrate and a flange having a conductive portion at least partially, the flange being adhered to the end of the photoreceptor drum via the conductive portion and an electrically conductive peelable adhesive. In this method for regenerating the electrophotographic photoreceptor, the adhesive force of the electrically conductive peelable adhesive is weakened by applying electricity to the electrically conductive peelable adhesive via the photoreceptor drum and the flange, and includes a step of removing the flange from the photoreceptor drum.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] There is a cylindrical assembly in which a support is attached to the end of a cylindrical substrate having a coating film formed on its outer peripheral surface. A part of the support is inserted into the substrate, and the support is attached to the end of the substrate by an adhesive at the end portion of the inner peripheral surface of the substrate.

[0005] In the method for manufacturing a regenerated substrate for regenerating the substrate of this cylindrical assembly, there are a step of separating the support from the substrate and a step of peeling and removing the coating film from the substrate. However, with only these steps, a part of the adhesive remains at the end portion of the inner peripheral surface of the substrate.

[0006] An object of the present disclosure is to suppress the remaining of the adhesive on the inner peripheral surface of the regenerated substrate as compared with the case where only the step of separating the support and the step of removing the coating film are provided.

Means for Solving the Problem

[0007] The method for manufacturing a reproduction substrate according to the first aspect of the present disclosure includes a step of separating a support from a cylindrical substrate having a coating film formed on an outer peripheral surface and the support attached to an end portion by a bonding material at an end portion of an inner peripheral surface, rotating the substrate around an axis, applying a liquid jetted from a nozzle to the end portion to remove the bonding material, and supporting the substrate in a non-contact state with the inner peripheral surface from which the bonding material has been removed and removing the coating film on the outer peripheral surface.

[0008] The method for manufacturing a reproduction substrate according to the second aspect of the present disclosure is the method for manufacturing a reproduction substrate according to the first aspect, wherein in the step of removing the bonding material, while moving the nozzle in a state inclined with respect to the axial direction of the substrate from the outside to the inside in the axial direction of the substrate, the liquid jetted from the nozzle is applied to the end portion and the end surface of the substrate, and the moving speed of the nozzle when applying the liquid to the end surface is made faster than the moving speed of the nozzle when applying the liquid to the end portion to remove the bonding material.

[0009] The method for manufacturing a reproduction substrate according to the third aspect of the present disclosure is the method for manufacturing a reproduction substrate according to the second aspect, wherein in the step of removing the bonding material, the liquid is continuously jetted from the nozzle, after moving the nozzle from the outside to the inside in the axial direction at a first speed, moving the nozzle in the reverse direction at a second speed slower than the first speed to remove the bonding material, and after removing the bonding material, moving the nozzle at a third speed equal to or higher than the first speed to apply the liquid jetted from the nozzle to the end surface.

[0010] The manufacturing method of the reproduction substrate according to the fourth aspect of the present disclosure is the manufacturing method of the reproduction substrate described in the first aspect. In the step of removing the bonding material, while moving the nozzle in a state inclined with respect to the axial direction of the substrate from the outside to the inside in the axial direction with respect to the substrate, the liquid ejected from the nozzle is applied to the end portion and the end face of the substrate. The rotational speed of the substrate when the liquid is applied to the end face is made faster than the rotational speed of the substrate when the liquid is applied to the end portion to remove the bonding material.

[0011] The manufacturing method of the reproduction substrate according to the fifth aspect of the present disclosure is the manufacturing method of the reproduction substrate described in the fourth aspect. In the step of removing the bonding material, liquid is continuously ejected from the nozzle. After rotating the substrate at a first rotational speed and moving the nozzle from the outside to the inside in the axial direction, the substrate is rotated at a second rotational speed slower than the first rotational speed, the nozzle is moved in the reverse direction to remove the bonding material. After removing the bonding material, the substrate is rotated at a third rotational speed equal to or higher than the first rotational speed, and the liquid ejected from the nozzle is applied to the end face.

[0012] The manufacturing method of the reproduction substrate according to the sixth aspect of the present disclosure is the manufacturing method of the reproduction substrate described in the first aspect. In the step of removing the bonding material, while moving the nozzle in a state inclined with respect to the axial direction of the substrate from the outside to the inside in the axial direction with respect to the substrate, the liquid ejected from the nozzle is applied to the end portion and the end face of the substrate. The separation distance between the tip of the nozzle and the end face when the liquid is applied to the end face is made longer than the separation distance between the tip of the nozzle and the end portion when the liquid is applied to the end portion to remove the bonding material.

[0013] The method for manufacturing a reproduction substrate according to the seventh aspect of the present disclosure is the method for manufacturing a reproduction substrate according to the sixth aspect, wherein in the step of removing the bonding material, liquid is continuously ejected from the nozzle, and after moving the nozzle from the outside to the inside in the axial direction with the separation distance between the tip of the nozzle and the end face being a first distance, the nozzle is moved in the reverse direction with the distance between the tip of the nozzle and the end portion being a second distance shorter than the first distance to remove the bonding material, and after removing the bonding material, the liquid ejected from the nozzle is applied to the end face with the distance between the tip of the nozzle and the end face being a third distance equal to or greater than the first distance.

[0014] The method for manufacturing a reproduction substrate according to the eighth aspect of the present disclosure is the method for manufacturing a reproduction substrate according to the first aspect, wherein in the step of removing the bonding material, while moving the nozzle in the axial direction from the outside to the inside in the axial direction of the substrate with the nozzle inclined with respect to the axial direction of the substrate, the liquid ejected from the nozzle is applied to the end portion and the end face of the substrate, and the ejection amount of the liquid ejected from the nozzle when applying the liquid to the end face is made smaller than the ejection amount of the liquid ejected from the nozzles when applying the liquid to the end portion to remove the bonding material.

[0015] The method for manufacturing a reproduction substrate according to the ninth aspect of the present disclosure is the method for manufacturing a reproduction substrate according to the eighth aspect, wherein in the step of removing the bonding material, liquid is continuously ejected from the nozzle, and after moving the nozzle from the outside to the inside in the axial direction with the ejection amount of the liquid from the nozzle being a first ejection amount, the nozzle is moved in the reverse direction with the ejection amount of the liquid from the nozzle being a second ejection amount greater than the first ejection amount to remove the bonding material, and after removing the bonding material, the liquid ejected from the nozzle is applied to the end face with the ejection amount of the liquid from the nozzle being a third ejection amount equal to or less than the first ejection amount.

[0016] The manufacturing method of the reproduction substrate according to the tenth aspect of the present disclosure is characterized in that, in the method for manufacturing the reproduction substrate according to any one of the first to ninth aspects, in the step of removing the bonding material, a covering member that covers the end face of the substrate from the nozzle side is used.

Effect of the Invention

[0017] According to the manufacturing method of the reproduction substrate according to the first aspect of the present disclosure, it is possible to suppress the bonding material from remaining on the inner peripheral surface of the reproduced substrate as compared with the case where only the steps of separating the support and removing the coating film are provided.

[0018] According to the manufacturing method of the reproduction substrate according to the second aspect of the present disclosure, it is possible to suppress the end face of the reproduced substrate from being scraped by the liquid ejected from the nozzle as compared with the case where the moving speed of the nozzle when applying the liquid to the end face is the same as the moving speed of the nozzle when applying the liquid to the end portion to remove the bonding material.

[0019] According to the manufacturing method of the reproduction substrate according to the third aspect of the present disclosure, a simpler configuration can be achieved as compared with the case of controlling the stop and start of the liquid ejected from the nozzle.

[0020] According to the manufacturing method of the reproduction substrate according to the fourth aspect of the present disclosure, it is possible to suppress the end face of the reproduced substrate from being scraped by the liquid ejected from the nozzle as compared with the case where the rotation speed of the substrate when applying the liquid to the end face is the same as the rotation speed of the substrate when applying the liquid to the end portion to remove the bonding material.

[0021] According to the manufacturing method of the reproduction substrate according to the fifth aspect of the present disclosure, a simpler configuration can be achieved as compared with the case of controlling the stop and start of the liquid ejected from the nozzle.

[0022] According to the method for manufacturing a reproduction substrate according to the sixth aspect of the present disclosure, the distance between the tip of the nozzle and the end face when applying the liquid to the end face is compared with the distance between the tip of the nozzle and the end portion when applying the liquid to the end portion to remove the bonding material. In this case, it is possible to suppress the end face of the reproduced substrate from being scraped by the liquid ejected from the nozzle.

[0023] According to the method for manufacturing a reproduction substrate according to the seventh aspect of the present disclosure, a simpler configuration can be achieved compared to the case of controlling the stop and start of the liquid ejected from the nozzle.

[0024] According to the method for manufacturing a reproduction substrate according to the eighth aspect of the present disclosure, the amount of liquid ejected from the nozzle when applying the liquid to the end face is compared with the amount of liquid ejected from the nozzle when applying the liquid to the end portion to remove the bonding material. In this case, it is possible to suppress the end face of the reproduced substrate from being scraped by the liquid ejected from the nozzle.

[0025] According to the method for manufacturing a reproduction substrate according to the ninth aspect of the present disclosure, a simpler configuration can be achieved compared to the case of controlling the stop and start of the liquid ejected from the nozzle.

[0026] According to the method for manufacturing a reproduction substrate according to the tenth aspect of the present disclosure, it is possible to suppress the end face of the reproduced substrate from being scraped by the liquid ejected from the nozzle compared to the case of directly applying the liquid to the end face.

Brief Description of the Drawings

[0027]

Figure 1

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Mode for Carrying Out the Invention

[0028] <First Embodiment> An example of the method for manufacturing a regenerated substrate according to the first embodiment of the present disclosure will be described with reference to FIGS. 1 to 11. The arrow H shown in each figure indicates the vertical direction of the regeneration device used in the method for manufacturing the regenerated substrate, which is the vertical direction. The arrow W shown in each figure represents the width direction of the regeneration device, which is orthogonal to the arrow H and indicates the horizontal direction. The arrow D shown in each figure represents the depth direction of the regeneration device, which is orthogonal to the arrows H and W and indicates the horizontal direction. Also, the drawings used in the following description are all schematic. Furthermore, the dimensional relationships of the respective elements shown in the drawings, the ratios of the respective elements, etc. do not necessarily match the actual ones.

[0029] The method for manufacturing a regenerated substrate according to the present embodiment is a method for manufacturing a regenerated substrate that can regenerate and reuse the cylindrical substrate constituting the photosensitive drum of an image forming apparatus. After the used photosensitive drum recovered from the market due to maintenance or the like of the image forming apparatus is input into the regeneration device, the substrate of the photosensitive drum is regenerated, and a new photosensitive drum is manufactured by inputting the regenerated substrate into the manufacturing line of the photosensitive drum.

[0030] First, the photosensitive drum 100 having a substrate to be regenerated by the method for manufacturing a regenerated substrate will be described, and then the regeneration device used in the method for manufacturing a regenerated substrate will be described.

[0031] (Photosensitive Drum 100) As shown in Fig. 1(A), the photoreceptor drum 100 is a member used in an electrophotographic image forming apparatus. As shown in Fig. 1(B), the photoreceptor drum 100 includes a cylindrical base body 102, a coating film 104, a silencer 106, a pair of flanges 108, and a bonding material 110. Note that the photoreceptor drum 100 will be described in the posture in which it is attached to the separation device 20 (see Fig. 3) that constitutes the reproducing device 10.

[0032] The base body 102 is made of metal and is a cylindrical member extending in the width direction as shown in Fig. 1(B). As an example, the base body 102 is formed of a conductive metal such as an aluminum alloy.

[0033] The coating film 104 is an organic photoreceptor layer mainly composed of a thermosetting resin, and is formed on the outer peripheral surface 102a of the base body 102 as shown in Fig. 1(B). Since the coating film 104 mainly contains a thermosetting resin, it cures when the temperature reaches or exceeds the crosslinking temperature T1. The crosslinking temperature T1 of the coating film 104 is set higher than the softening point T2 of the bonding material 110 described later.

[0034] As shown in Fig. 1(B), the silencer 106 is a resin-made cylindrical member having a substantially C-shaped cross section that is inserted into the base body 102, and the outer peripheral surface of the silencer 106 is in contact with the inner peripheral surface 102c of the base body 102. The silencer 106 has a function of suppressing the vibration of the photoreceptor drum 100 used in the image forming apparatus.

[0035] The flange 108 is integrally formed using a material mainly composed of a thermoplastic resin (for example, polycarbonate), and is respectively disposed on both sides in the longitudinal direction of the base body 102 and attached to the ends of the base body 102 as shown in Figs. 1(A) and 1(B). The flange 108 is an example of a support.

[0036] The flange 108 has a cylindrical main body portion 108a and a cylindrical protruding portion 108b that protrudes inward (toward the central portion in the longitudinal direction of the base 102) with respect to the main body portion 108a. The outer diameter dimension of the main body portion 108a is the same as the outer diameter dimension of the base 102 on which the coating film 104 is formed, and the outer diameter dimension of the protruding portion 108b is made smaller than the inner diameter dimension of the base 102.

[0037] Also, a stepped surface 108c facing the width direction is formed between the main body portion 108a and the protruding portion 108b. And in a state where the flange 108 is attached to the base 102, this stepped surface 108c contacts the end surface 102b of the base 102, and the protruding portion 108b is arranged inside the base 102. In other words, the flange 108 is positioned in the width direction by pressing the stepped surface 108c against the end surface 102b of the base 102.

[0038] The bonding material 110 is a thermoplastic hot melt adhesive, and as shown in FIG. 1(B), it is provided between the outer peripheral surface of the protruding portion 108b and the inner peripheral surface 102c of the base 102, and is configured to bond the flange 108 to the base 102.

[0039] (Recycling device 10) As shown in FIG. 2, the recycling device 10 includes a separation device 20, a removal device 40 arranged on one side in the width direction (the right side in the figure) of the separation device 20, a peeling device 60 arranged on one side in the width direction of the removal device 40, an inspection device 70 arranged on one side in the width direction of the peeling device 60, and a control unit 58 that controls each device.

[0040] 〔Separation device 20〕 The separation device 20 is a device that separates and removes the flange 108 and the silencer 106 from the photosensitive drum 100 recovered from the market, and as shown in FIG. 3, includes a gripping portion 22, a heating portion 24, a separation portion 26, and an extrusion portion 28.

[0041] The holding portion 22 includes a holding part 22a that holds the photosensitive drum 100 so as to extend in the width direction, and a rotating part 22b that rotates the photosensitive drum 100 held by the holding part 22a about the axis with the axial direction being the vertical direction. The holding portion 22 holds the photosensitive drum 100 from the outer peripheral surface side of the coating film 104 so that only the holding part 22a contacts the coating film 104 formed on the outer peripheral surface 102a of the base body 102 in order to suppress the occurrence of scratches or the like on the base body 102.

[0042] The heating portion 24 is arranged to heat the end portions in the width direction of the base body 102 of the photosensitive drum 100 held by the holding portion 22.

[0043] The separating portion 26 is arranged on the other side in the width direction (the left side in the figure) with respect to the photosensitive drum 100 held by the holding portion 22. The separating portion 26 includes a chuck part 26a that grips the flange 108 of the photosensitive drum 100 held by the holding portion 22, and a rotating part 26b that rotates the flange 108 gripped by the chuck part 26a about the axis with the axial direction being the width direction. Further, the separating portion 26 includes a moving part 26c that moves the chuck part 26a and the rotating part 26b in the width direction.

[0044] The pushing-out portion 28 is arranged on the opposite side of the separating portion 26 with the photosensitive drum 100 interposed therebetween, and includes a main body portion 28a that extends in the width direction, a rod that is supported by the main body portion 28a so as to be movable in the width direction and extends in the width direction, and a pushing-out part 28b that is fixed to the other side in the width direction of the rod and protrudes from the main body portion 28a to the other side in the width direction and moves along with the movement of the rod toward the photosensitive drum 100 held by the holding portion 22. Specifically, the main body portion 28a and the rod can be exemplified by an air cylinder configured such that the rod can advance and retract (protrude and retract) with respect to the main body portion 28a.

[0045] 〔Removing device 40〕 The removing device 40 is a device for removing the bonding material 110 from the substrate 102 (see FIG. 4) on whose outer peripheral surface 102a a coating film 104 is formed and on whose inner peripheral surface 102c the bonding material 110 remains. As shown in FIG. 5, the removing device 40 includes a gripping part 42 and a pair of removing parts 46 and 56. Details of the removing device 40 will be described later.

[0046] 〔Peeling device 60〕 The peeling device 60 is a device for peeling and removing the coating film 104 from the substrate 102 on which the coating film 104 is formed (hereinafter sometimes referred to as "the substrate 102 with the coating film 104"). As shown in FIG. 6, the peeling device 60 includes a housing 62, a gripping part 64, a motor 66, a nozzle 68a, and a moving part 68b.

[0047] The housing 62 is in the shape of a rectangular parallelepiped extending in the vertical direction, and a rectangular parallelepiped-shaped peeling space 62a in which the substrate 102 with the coating film 104 is arranged is formed inside (see FIG. 7). An opening 62b extending in the vertical direction is formed in the front part of the housing 62 in the depth direction.

[0048] A pair of gripping parts 64 are provided, and grip the substrate 102 with the coating film 104 by sandwiching it from above and below so as to extend in the vertical direction. As shown in FIGS. 7 and 8, the substrate 102 with the coating film 104 is arranged so as to face the opening 62b in the depth direction.

[0049] Specifically, as shown in FIG. 7, conical surfaces 64a in the shape of a hammer are respectively formed on the pair of gripping parts 64, and these conical surfaces 64a are in contact with the corner parts of the substrate 102. Here, the corner part of the substrate 102 is the ridge line part formed by the end surface 102b and the inner peripheral surface 102c of the substrate 102. In this way, the pair of gripping parts 64 support the substrate 102 in a non-contact state with the inner peripheral surface 102c of the substrate 102. And the pair of gripping parts 64 grip the substrate 102 rotatably with the axis of the substrate 102 as the rotation axis.

[0050] The motor 66 is arranged to rotate the gripping part 64 disposed above. By rotating the motor 66 to rotate one (upper) gripping part 64, the base body 102 gripped by the pair of gripping parts 64 rotates about the axis. Note that the other (lower) gripping part 64 is arranged to rotate passively due to the rotation of the base body 102 about the axis.

[0051] The nozzle 68a is arranged to inject water toward the base body 102 with the coating film 104. Specifically, the nozzle 68a is arranged on the opposite side of the base body 102 with the opening 62b therebetween.

[0052] The moving part 68b extends in the vertical direction and supports the proximal end portion of the nozzle 68a, and is arranged to move the nozzle 68a in the vertical direction. Specifically, the moving part 68b is a uniaxial robot that moves the nozzle 68a so as to cover the range in which the base body 102 is arranged in the vertical direction.

[0053] 〔Inspection device 70〕 As shown in FIG. 2, the inspection device 70 inspects the presence or absence of scratches or the like on the base body 102 from which the coating film 104 has been peeled off by the peeling device 60, and determines whether the base body 102 is a good product or a defective product.

[0054] (Main part configuration) Next, the removing device 40 (see FIG. 5) for removing the bonding material 110 from the base body 102 with the coating film 104 and the control unit 58 (see FIG. 2) will be described. As shown in FIG. 5, the removing device 40 includes a gripping part 42 and a pair of removing parts 46 and 56.

[0055] 〔Gripping part 42 of the removing device 40〕 As shown in FIG. 5, the gripping portion 42 is configured to grip the substrate 102 with the coating film 104 from the outer peripheral surface side of the coating film 104 formed on the outer peripheral surface 102a of the substrate 102 so as to extend in the width direction. Specifically, as shown in FIG. 9, the gripping portion 42 has a pair of drive rolls 44a whose axial direction is the width direction, which are in contact with the lower portion of the substrate 102 with the coating film 104 to support the substrate 102 and are spaced apart in the depth direction. Further, the gripping portion 42 has a pair of driven rolls 44b whose axial direction is the width direction, which are in contact with the upper portion of the substrate 102 with the coating film 104 to stabilize the posture of the substrate 102 and are spaced apart in the depth direction. The pair of drive rolls 44a rotate the substrate 102 with the coating film 104 around its axis by transmitting the driving force from a motor (not shown) through gears (not shown) and the like.

[0056] 〔Removing portions 46 and 56 of the removing device 40〕 As shown in FIG. 5, the removing portion 46 is disposed on the other side in the width direction with respect to the gripping portion 42, and includes a nozzle 46a for injecting water, a pump 46b for injecting water from the nozzle 46a, and a moving portion 46c which is a three-dimensional robot (three-axis robot) for moving the nozzle 46a in the width direction. Water is an example of a liquid.

[0057] Specifically, the nozzle 46a is spaced apart from the substrate 102 in the width direction and is disposed in an inclined state with respect to the axial direction of the substrate 102. Then, the water injected from the nozzle 46a in a direction inclined with respect to the axial direction of the substrate 102 hits the end portion (the end portion on the other side in the width direction) of the inner peripheral surface 102c of the substrate 102. In this embodiment, as an example, the angle at which water is injected is 30 [degrees] with respect to the axis (axial direction) of the substrate 102 as viewed from the depth direction.

[0058] Further, as shown in FIG. 5, the removal unit 56 is disposed on one side in the width direction with respect to the gripping unit 42 and is symmetric in the width direction with respect to the removal unit 46. The removal unit 56 includes a nozzle 56a from which water is sprayed, a pump 56b that sprays water from the nozzle 56a, and a moving unit 56c that is a three-dimensional robot that moves the nozzle 56a in the width direction.

[0059] Specifically, the nozzle 56a is spaced apart from the base body 102 in the width direction and is disposed in an inclined state with respect to the axial direction of the base body 102. The water sprayed from the nozzle 56a in a direction inclined with respect to the axial direction of the base body 102 hits the end portion (the end portion on one side in the width direction) of the inner peripheral surface 102c of the base body 102.

[0060] 〔Control Unit 58〕 The control unit 58 shown in FIG. 2 is configured to control the separation device 20, the removal device 40, the peeling device 60, and the inspection device 70. The control of each part by the control unit 58 will be described together with the operations described later.

[0061] (Operation of the Main Component Configuration) Next, a method for manufacturing a regenerated substrate for regenerating the substrate 102 will be described. In the method for manufacturing a regenerated substrate, there are a separation step of separating the flange 108 from the substrate 102, a removal step of removing the bonding material 110 at the end portion of the inner peripheral surface 102c of the substrate 102, and a peeling step of peeling and removing the coating film on the outer peripheral surface 102a of the substrate 102. The separation step, the removal step, and the peeling step are performed in this order to manufacture a regenerated substrate.

[0062] In the non-operating state of the separation device 20, the chuck portion 26a shown in FIG. 3 is disposed at a position spaced apart from the flange 108 (the flange 108 on the other side in the width direction) of the photosensitive drum 100 gripped by the gripping portion 22, and the rotation of the rotating portion 26b is stopped. Further, most of the rod that fixes the extrusion portion 28b on the other side in the width direction of the extrusion portion 28 of the extrusion unit 28 is housed in the main body portion 28a, and is spaced apart from the flange 108 (the flange 108 on one side in the width direction) of the photosensitive drum 100.

[0063] Also, in the non-operating state of the removing device 40, the pumps 46b and 56b shown in FIG. 5 are non-operating, and the nozzles 46a and 56a are arranged at positions farthest from the end (end face 102b) of the substrate 102 with the coating film 104 held by the holding part 42 in the width direction. Specifically, the nozzles 46a and 56a are arranged at positions farthest from the end of the substrate 102 in the width direction so that water does not hit the substrate 102 even if water is sprayed from the nozzles 46a and 56a.

[0064] Also, in the non-operating state of the peeling device 60, the motor 66 shown in FIG. 6 is non-operating, the spraying of water from the nozzle 68a is stopped, and the nozzle 68a is arranged at the lower part of the moving part 68b.

[0065] 〔Separation process〕 In the separation process, when the substrate 102 with the coating film 104 is held by the holding part 22a of the holding part 22 shown in FIG. 3 so as to extend in the width direction, the separation device 20 operates, and each part is controlled by the control part 58 (see FIG. 2). Note that the operations of each part described below are under the control of the control part 58.

[0066] When the separation device 20 is operated, the heating part 24 heats the other part in the width direction of the substrate 102 of the photosensitive drum 100. Thereby, the bonding material 110 (see FIG. 1(B)) is softened.

[0067] In the state where the bonding material 110 is softened, the chuck part 26a and the rotating part 26b are moved to one side (the right side in the figure) in the width direction by the moving part 26c, and the flange 108 is grasped by the chuck part 26a. Further, the chuck part 26a holding the flange 108 rotates by the rotating part 26b.

[0068] Further, due to the moving part 26c, the rotating chuck part 26a moves toward the other side in the width direction (the left side in the figure), and the flange 108 is separated from the photoreceptor drum 100. Then, the separated flange 108 is released by the chuck part 26a and discarded. In this way, one flange 108 is separated from the photoreceptor drum 100.

[0069] Furthermore, due to the rotating part 22b, the photoreceptor drum 100 from which one flange 108 has been separated rotates 180 degrees, and the other flange 108 faces the chuck part 26a of the separating part 26 in the width direction. Then, in the same procedure as for one flange 108, the other flange 108 is separated from the photoreceptor drum 100.

[0070] Furthermore, when both flanges 108 are separated from the photoreceptor drum 100, the extrusion part 28b of the extrusion part 28 protrudes (moves) from the main body part 28a toward the other side in the width direction and enters the inside of the base body 102. Then, the silencer 106 (see FIG. 1(B)) inside the base body 102 is extruded and separated from the base body 102. In this way, the photoreceptor drum 100 becomes the base body 102 with the coating film 104 after the pair of flanges 108 and the silencer 106 are separated from the photoreceptor drum 100 (see FIG. 4). In this state, the bonding material 110 used to bond the flange 108 to the base body 102 remains at both end portions of the inner peripheral surface 102c of the base body 102 with the coating film 104.

[0071] 〔Removal step〕 In the removal step, when the base body 102 with the coating film 104 is gripped by the gripping part 42 shown in FIGS. 5 and 9, the removal device 40 operates, and each part is controlled by the control part 58 (see FIG. 2). Note that the operations of each part described below are under the control of the control part 58.

[0072] When the removal device 40 is operated, the drive roll 44a shown in FIG. 9 rotates at a constant rotational speed. Due to the rotation of the drive roll 44a, the base body 102 with the coating film 104 rotates at a constant speed around the axis of the base body 102. Also, when the base body 102 with the coating film 104 rotates, the driven roll 44b also rotates.

[0073] Furthermore, pumps 46b and 56b shown in FIG. 5 operate, and water is ejected from nozzles 46a and 56a. Here, while the removing device 40 is operating, water is continuously ejected from nozzles 46a and 56a. In other words, while the removing device 40 is operating, pumps 46b and 56b continuously operate without stopping. Note that the water ejected from nozzles 46a and 56a does not hit the base body 102.

[0074] In this state, by the moving part 46c, as shown in FIGS. 10(A) and 10(B), the nozzle 46a that is ejecting water moves from the other side in the width direction to one side. Then, the water ejected by the nozzle 46a passes over the end portion (the end portion on the other side in the width direction) where the bonding material 110 remains on the inner peripheral surface 102c. In other words, the nozzle 46a moves from the outer side to the inner side in the axial direction of the base body 102 by the moving part 46c so as to change from the state of FIG. 10(A) to the state of FIG. 10(B). That is, the water ejected from the nozzle 46a hits the end surface 102b of the base body 102 on the other side in the width direction and then hits the end portion of the inner peripheral surface 102c of the base body 102 on the other side in the width direction. Here, the outer side in the axial direction of the base body 102 is the side that moves away from the central portion in the longitudinal direction of the base body 102, and the inner side in the axial direction of the base body 102 is the side that approaches the central portion in the longitudinal direction of the base body 102.

[0075] Here, the moving speed of the nozzle 46a (the moving speed when the nozzle 46a moves from the other side in the width direction to one side) is set as the first speed V1. Regarding this first speed V1, it is predetermined so that the water ejected from the nozzle 46a does not impart a scratch that causes functional damage to the end surface 102b even when it hits the rotating end surface 102b of the base body 102. That is, regarding this first speed V1, it is determined so that the water ejected from the nozzle 46a does not hit the same part on the end surface 102b for a long time.

[0076] Further, as shown in FIGS. 10(B) and 11(A), by the moving part 46c, the nozzle 46a that is ejecting water moves from one side in the width direction to the other side, and the water ejected by the nozzle 46a moves on the inner peripheral surface 102c past the end portion where the bonding material 110 remains and up to in front of the end surface 102b. In other words, the moving part 46c moves the nozzle 46a in the reverse direction so as to change from the state of FIG. 10(B) to the state of FIG. 11(A).

[0077] Here, the moving speed of the nozzle 46a (the moving speed when the nozzle 46a moves from one side in the width direction to the other side) is set as a second speed V2 which is slower than the first speed V1. Regarding this second speed V2, it is predetermined such that the water ejected from the nozzle 46a hits the inner peripheral surface 102c of the rotating base body 102 and removes all of the bonding material 110 remaining on the inner peripheral surface 102c. By moving the nozzle 46a at the second speed V2, all of the bonding material 110 remaining at the end portion on the other side in the width direction on the inner peripheral surface 102c is removed. That is, regarding this second speed V2, it is determined such that the water ejected from the nozzle 46a hits the entire bonding material 110.

[0078] Further, as shown in FIGS. 11(A) and 11(B), by the moving part 46c, the nozzle 46a that is ejecting water moves from one side in the width direction (the state of FIG. 11(A)) to the other side (the state of FIG. 11(B)), and the water ejected by the nozzle 46a passes through the end surface 102b of the base body 102, and the nozzle 46a stops at the initial position (the state of FIG. 11(B)). Note that even when the nozzle 46a stops at the initial position, the pump 46b continues to operate, and water continues to be ejected from the nozzle 46a. This water (the water continuously ejected from the nozzle 46a at the initial position) does not hit the end surface 102b of the base body 102 on the other side in the width direction.

[0079] Here, the moving speed of the nozzle 46a (the moving speed when the nozzle 46a moves from one side in the width direction (the state of FIG. 11(A)) to the other side (the state of FIG. 11(B))) is set to a third speed V3 that is equal to or higher than the first speed V1. Regarding this third speed V3, it is determined in advance so that even when the water ejected from the nozzle 46a hits the end face 102b of the rotating base body 102, no damage that would cause functional impairment is imparted to the end face 102b. That is, regarding this third speed V3, it is determined so that the water ejected from the nozzle 46a does not hit the same part of the end face 102b for a long time.

[0080] Then, when the nozzle 46a stops at the initial position, the nozzle 56a on one side in the width direction moves by the moving part 56c shown in FIG. 5. Specifically, in the same manner as the control of the moving part 46c etc. by the control part 58, the moving part 56c etc. are controlled by the control part 58, and all of the bonding material 110 remaining at the end part on one side in the width direction on the inner peripheral surface 102c is removed.

[0081] 〔Peeling process〕 In the peeling process, when the base body 102 with the coating film 104 that has finished the removal process is gripped by the gripping part 64 shown in FIGS. 6 and 7 so as to extend in the vertical direction in a non-contact state with the inner peripheral surface 102c of the base body 102, the peeling device 60 operates, and each part is controlled by the control part 58 (see FIG. 2). Note that the operations of each part described below are under the control of the control part 58.

[0082] When the peeling device 60 is operated, the base body 102 with the coating film 104 rotates at a constant rotational speed around the axis of the base body 102 by the motor 66. Also, water is ejected from the nozzle 68a arranged so as to face the lower end part of the base body 102 with the coating film 104 toward the rotating base body 102 with the coating film 104.

[0083] Furthermore, by the moving part 68b, the nozzle 68a from which water is being ejected is moved upward. Then, by ejecting water toward the rotating base body 102 with the coating film 104, the coating film 104 is peeled off and removed from the base body 102 with the coating film 104. In this way, a regenerated base body is manufactured.

[0084] Regarding the reproduced substrate 102, it is determined whether it is a good product or a defective product by the inspection device 70 described above, and one example of the process ends.

[0085] (Summary) As described above, in the method for manufacturing a reproduced substrate, in the removal step, the substrate 102 with the coating film 104 is rotated about the axis, and the water sprayed from the nozzle 46a is applied to the end portion of the inner peripheral surface 102c to remove the bonding material 110. As a result, compared with the case where only the separation step of separating the flange 108 and the peeling step of peeling and removing the coating film are provided, the remaining of the bonding material 110 on the inner peripheral surface 102c of the reproduced substrate is suppressed.

[0086] Also, in the method for manufacturing a reproduced substrate, in the peeling step, the substrate 102 with the coating film 104 is gripped by the gripping portion 64 in a non-contact state with the inner peripheral surface 102c of the substrate 102. As a result, compared with the case where the substrate 102 with the coating film 104 is gripped in contact with the inner peripheral surface 102c of the substrate, the damage caused to the inner peripheral surface 102c by the gripping portion 64 is suppressed. Thereby, when a new flange 108 is attached to the inner peripheral surface 102c of the reproduced substrate 102, the occurrence of defects such as the inclination of the flange 108 due to the damage can be suppressed.

[0087] Also, in the method for manufacturing a reproduced substrate, in the removal step, the moving speed of the nozzle 46a when water is applied to the end face 102b is made faster than the moving speed of the nozzle 46a when water is applied to the end portion of the inner peripheral surface 102c to remove the bonding material 110. As a result, compared with the case where the moving speed of the nozzle when water is applied to the end face is the same as the moving speed of the nozzle when water is applied to the end portion of the inner peripheral surface 102c to remove the bonding material 110, the end face 102b is suppressed from being scraped by the water sprayed from the nozzle 46a. Thereby, when a new flange 108 is attached to the end face 102b of the reproduced substrate 102, the function of the flange 108 can be suppressed from being impaired (the occurrence of positioning defects in the width direction of the flange 108 can be suppressed).

[0088] In addition, in the method for manufacturing the reproduction substrate, in the removal step, after moving the nozzle 46a from the outer side to the inner side in the axial direction at the first speed V1, the nozzle 46a is moved in the reverse direction at the second speed V2 slower than the first speed V1 to remove the bonding material 110. After removing the bonding material 110, the nozzle 46a is moved at the third speed V3 equal to or higher than the first speed V1 to apply the water ejected from the nozzle 46a to the end face 102b. In this way, water is continuously ejected from the nozzles 46a and 56a. As a result, compared with the case of controlling the stop and start of the water ejected from the nozzle, the configuration is simplified.

[0089] <Second Embodiment> An example of the method for manufacturing the reproduction substrate according to the second embodiment of the present disclosure will be described with reference to FIGS. 12 and 13. Note that, for the second embodiment, the parts different from the first embodiment will be mainly described.

[0090] As shown in FIG. 2, the reproduction apparatus 120 according to the second embodiment includes a separation apparatus 20, a removal apparatus 40, a peeling apparatus 60, an inspection apparatus 70, and a control unit 158 that controls each apparatus.

[0091] In the second embodiment, the removal step is different from the removal step of the first embodiment. The removal step of the second embodiment will be described below.

[0092] 〔Removal Step〕 In the removal step, when the substrate 102 with the coating film 104 is gripped by the gripping portion 42 shown in FIGS. 5 and 9, the removal apparatus 40 is operated, and each part is controlled by the control unit 158 (see FIG. 2). Note that the operations of each part described below are under the control of the control unit 158.

[0093] When the removal apparatus 40 is operated, the drive roll 44a shown in FIG. 9 rotates. Due to the rotation of the drive roll 44a, the substrate 102 with the coating film 104 rotates. Further, when the substrate 102 with the coating film 104 rotates, the driven roll 44b also rotates.

[0094] Furthermore, pumps 46b and 56b shown in FIG. 5 operate, and water is sprayed from nozzles 46a and 56a. Here, while the removing device 40 is operating, water is continuously sprayed from nozzles 46a and 56a. In other words, while the removing device 40 is operating, pumps 46b and 56a continuously operate without stopping. Note that the water sprayed from nozzles 46a and 56a does not hit the base body 102.

[0095] In this state, by the moving part 46c, as shown in FIGS. 12(A) and (B), the nozzle 46a that is spraying water moves at a constant speed from the other side in the width direction to one side. Then, the water sprayed by the nozzle 46a passes through the end portion (the end portion on the other side in the width direction) where the bonding material 110 remains on the inner peripheral surface 102c. In other words, the moving part 46c moves the nozzle 46a from the outer side to the inner side in the axial direction of the base body 102 so as to change from the state of FIG. 12(A) to the state of FIG. 12(B). That is, the water sprayed from the nozzle 46a hits the end face 102b of the base body 102 on the other side in the width direction and then hits the end portion of the inner peripheral surface 102c of the base body 102 on the other side in the width direction.

[0096] Here, the rotation speed of the base body 102 with the coating film 104 (the rotation speed of the base body 102 with the coating film 104 when the nozzle 46a moves from the other side in the width direction to one side) is set to the first rotation speed V6. Regarding this first rotation speed V6, it is predetermined so that the water sprayed from the nozzle 46a does not cause damage that would result in functional impairment to the end face 102b even when it hits the rotating end face 102b of the base body 102. That is, regarding this first rotation speed V6, it is determined so that the water sprayed from the nozzle 46a does not hit the same part on the end face 102b for a long time.

[0097] Also, as shown in FIGS. 12(B) and 13(A) by the moving part 46c, the nozzle 46a that sprays water moves at a constant speed from one side in the width direction to the other side, and the water sprayed by the nozzle 46a moves past the portion where the bonding material 110 remains on the inner peripheral surface 102c and reaches just before the end surface 102b. In other words, the moving part 46c moves the nozzle 46a in the reverse direction so that the state shown in FIG. 12(B) changes to the state shown in FIG. 13(A).

[0098] Here, the rotation speed of the substrate 102 with the coating film 104 (the rotation speed of the substrate 102 with the coating film 104 when the nozzle 46a moves at a constant speed from one side in the width direction to the other side) is set to a second rotation speed V7 that is slower than the first rotation speed V6. Regarding this second rotation speed V7, it is predetermined such that the water sprayed from the nozzle 46a hits the inner peripheral surface 102c of the rotating substrate 102 and removes all the bonding material 110 remaining on the inner peripheral surface 102c. By rotating the substrate 102 with the coating film 104 at the second rotation speed V7, all the bonding material 110 remaining at the end portion on the other side in the width direction on the inner peripheral surface 102c is removed. That is, regarding this second rotation speed V7, it is determined such that the water sprayed from the nozzle 46a hits the entire bonding material 110.

[0099] Furthermore, as shown in FIGS. 13(A) and 13(B) by the moving part 46c, the nozzle 46a that sprays water moves at a constant speed from one side in the width direction (the state in FIG. 13(A)) to the other side (the state in FIG. 13(B)), and the water sprayed by the nozzle 46a passes through the end surface 102b of the substrate 102, and the nozzle 46a stops at the initial position (the state in FIG. 13(B)). Even when the nozzle 46a stops at the initial position, the pump 46b continues to operate, and water continues to be sprayed from the nozzle 46a. This water (the water continuously sprayed from the nozzle 46a at the initial position) does not hit the end surface 102b of the substrate 102 on the other side in the width direction.

[0100] Here, the rotation speed of the substrate 102 with the coating film 104 (the rotation speed of the substrate 102 with the coating film 104 when the nozzle 46a moves at a constant speed from one side in the width direction (the state of FIG. 13(A)) to the other side (the state of FIG. 13(B))) is set to a third rotation speed V8 that is equal to or higher than the first rotation speed V6. Regarding this third rotation speed V8, it is predetermined such that even when the water jetted from the nozzle 46a hits the end face 102b of the rotating substrate 102, no damage that would cause functional impairment is imparted to the end face 102b. That is, regarding this third rotation speed V8, it is determined such that the water jetted from the nozzle 46a does not hit the same part on the end face 102b for a long time.

[0101] Then, when the nozzle 46a stops at the initial position, the nozzle 56a on one side in the width direction moves by the moving part 56c shown in FIG. 5. Specifically, in the same manner as the control by the control unit 158 for the moving part 46c and the like, the moving part 56c and the like are controlled by the control unit 158, and all of the bonding material 110 remaining at the end part on one side in the width direction on the inner peripheral surface 102c is removed.

[0102] In addition, in the removal process of the second embodiment, different from the removal process of the first embodiment, the moving speed of the nozzle 46a is uniform (for example, always the second speed V2 described above).

[0103] (Summary) As described above, in the method for manufacturing a regenerated substrate, in the removal process, the rotation speed of the substrate 102 when water is applied to the end face 102b is made faster than the rotation speed of the substrate 102 when water is applied to the end part of the inner peripheral surface 102c to remove the bonding material 110. Thereby, compared with the case where the rotation speed of the substrate when water is applied to the end face is the same as the rotation speed of the substrate when water is applied to the end part of the inner peripheral surface 102c to remove the bonding material 110, the end face 102b is suppressed from being scraped by the water jetted from the nozzle 46a.

[0104] In the method for manufacturing the reproduction substrate, in the removal step, after the substrate 102 is rotated at the first rotation speed V6 and the nozzle 46a is moved from the outer side to the inner side in the axial direction, the substrate 102 is rotated at a second rotation speed V7 slower than the first rotation speed V6, and the nozzle 46a is moved in the reverse direction to remove the bonding material 110. After removing the bonding material 110, the substrate 102 is rotated at a third rotation speed V8 equal to or higher than the first rotation speed V6, and the water sprayed from the nozzle 46a is applied to the end face 102b. As a result, a simpler configuration is achieved compared to the case where the stop and start of the water sprayed from the nozzle are controlled.

[0105] Regarding other operations, they are the same as those of the first embodiment except for the operations caused by the difference in the moving speed of the nozzle.

[0106] <Third Embodiment> An example of the method for manufacturing the reproduction substrate according to the third embodiment of the present disclosure will be described with reference to FIGS. 14 and 15. Note that, for the third embodiment, the parts different from the first embodiment will be mainly described.

[0107] As shown in FIG. 2, the reproduction device 210 according to the third embodiment includes a separation device 20, a removal device 40, a peeling device 60, an inspection device 70, and a control unit 258 that controls each device.

[0108] In the third embodiment, the removal step is different from the removal step of the first embodiment. The removal step of the third embodiment will be described below.

[0109] 〔Removal Step〕 In the removal step, when the substrate 102 with the coating film 104 is gripped by the gripping part 42 shown in FIGS. 5 and 9, the removal device 40 operates, and each part is controlled by the control unit 258 (see FIG. 2). Note that the operations of each part described below are under the control of the control unit 258.

[0110] When the removal device 40 is operated, the drive roll 44a shown in FIG. 9 rotates at a constant rotational speed. Due to the rotation of the drive roll 44a, the substrate 102 with the coating film 104 rotates at a constant speed around the axis of the substrate 102. Also, as the substrate 102 with the coating film 104 rotates, the driven roll 44b also rotates.

[0111] Furthermore, the pumps 46b and 56b shown in FIG. 5 operate, and water is sprayed from the nozzles 46a and 56a. Here, while the removal device 40 is operating, water is continuously sprayed from the nozzles 46a and 56a. In other words, while the removal device 40 is operating, the pumps 46b and 56a operate continuously without stopping. Note that the water sprayed from the nozzles 46a and 56a does not hit the substrate 102.

[0112] In this state, by the moving part 46c, as shown in FIGS. 14(A) and (B), the nozzle 46a that is spraying water moves from the other side in the width direction to one side. Then, the water sprayed by the nozzle 46a passes through the end portion (the end portion on the other side in the width direction) where the bonding material 110 remains on the inner peripheral surface 102c. In other words, the moving part 46c moves the nozzle 46a from the outside to the inside in the axial direction of the substrate 102 so as to change from the state in FIG. 14(A) to the state shown by the two-dot chain line in FIG. 14(B). That is, after the water sprayed from the nozzle 46a hits the end face 102b of the substrate 102 on the other side in the width direction, it hits the end portion of the inner peripheral surface 102c of the substrate 102 on the other side in the width direction.

[0113] Here, the separation distance between the tip of the nozzle 46a and the end face 102b of the base body 102 (the separation distance between the tip of the nozzle 46a and the end face 102b when the nozzle 46a moves from the other side in the width direction to one side) is defined as the first distance L1. Specifically, the separation distance between the tip of the nozzle 46a and the end face 102b when the water jetted from the nozzle 46a hits the end face 102b is defined as the first distance L1. Regarding this first distance L1, it is predetermined so that even when the water jetted from the nozzle 46a hits the end face 102b of the rotating base body 102, no damage that would cause functional impairment is imparted to the end face 102b. Since the wall thickness of the base body 102 is thin, the separation distance between the tip of the nozzle 46a and the end face 102b of the base body 102 may also be regarded as the separation distance between the tip of the nozzle 46a and the surface obtained by extending the inner peripheral surface 102c of the base body 102 in the axial direction of the base body 102.

[0114] Also, as shown in FIGS. 14(B) and 15(A), by the moving part 46c, the nozzle 46a that is jetting water moves from one side in the width direction to the other side, and the water jetted by the nozzle 46a moves past the end portion where the bonding material 110 remains on the inner peripheral surface 102c and reaches just in front of the end face 102b. In other words, the moving part 46c causes the nozzle 46a to move in the reverse direction so as to change from the state shown by the solid line in FIG. 14(B) to the state in FIG. 15(A).

[0115] Here, the separation distance between the tip of the nozzle 46a and the end portion of the inner peripheral surface 102c (the separation distance between the tip of the nozzle 46a and the end portion of the inner peripheral surface 102c when the nozzle 46a moves from one side in the width direction to the other side) is set to a second distance L2 that is shorter than the first distance L1. Regarding this second distance L2, it is predetermined such that the water jetted from the nozzle 46a hits the inner peripheral surface 102c of the rotating base 102 and removes all of the bonding material 110 remaining on the inner peripheral surface 102c. Then, by setting the separation distance between the tip of the nozzle 46a and the end portion of the inner peripheral surface 102c to the second distance L2, all of the bonding material 110 remaining at the end portion on the other side in the width direction on the inner peripheral surface 102c is removed. Note that prior to the nozzle 46a moving from one side in the width direction to the other side, the separation distance between the tip of the nozzle 46a and the end portion of the inner peripheral surface 102c is changed by the moving portion 46c from the first distance L1 (the state shown by the dashed-two-dot line in Fig. 14(B)) to the second distance L2 (the state shown by the solid line in Fig. 14(B)).

[0116] Furthermore, as shown in Figs. 15(A) and 15(B), by the moving portion 46c, the nozzle 46a that is jetting water moves from one side in the width direction (the state shown by the solid line in Fig. 15(A)) to the other side (the state in Fig. 15(B)), and the water jetted by the nozzle 46a passes through the end face 102b of the base 102, and the nozzle 46a stops at the initial position (the state in Fig. 15(B)). Note that even when the nozzle 46a stops at the initial position, the pump 46b continues to operate, and water continues to be jetted from the nozzle 46a. This water (the water that continues to be jetted from the nozzle 46a at the initial position) does not hit the end face 102b of the base 102 on the other side in the width direction.

[0117] Here, the separation distance between the tip of the nozzle 46a and the end face 102b of the base body 102 (the separation distance between the tip of the nozzle 46a and the end face 102b of the base body 102 when the nozzle 46a moves from one side in the width direction (the state shown by the solid line in FIG. 15(A)) to the other side (the state in FIG. 15(B))) is set to a third distance L3 that is equal to or greater than the first distance L1. Specifically, the separation distance between the tip of the nozzle 46a and the end face 102b of the base body 102 when the water ejected from the nozzle 46a hits the end face 102b is set to a third distance L3 that is equal to or greater than the first distance L1. Regarding this third distance L3, it is determined such that even when the water ejected from the nozzle 46a hits the end face 102b of the rotating base body 102, no damage that would cause functional impairment is imparted to the end face 102b. Note that the separation distance between the tip of the nozzle 46a and the end portion of the inner peripheral surface 102c is changed from a second distance L2 (the state shown by the two-dot chain line in FIG. 15(A)) to a third distance L3 (the state shown by the solid line in FIG. 15(A)) by the moving portion 46c prior to the nozzle 46a moving from one side to the other side in the width direction. The separation distance between the tip of the nozzle 46a and the end portion of the inner peripheral surface 102c may start to be changed from the second distance L2 (the state shown by the two-dot chain line in FIG. 15(A)) to the third distance L3 (the state shown by the solid line in FIG. 15(A)) by the moving portion 46c when the nozzle 46a starts to move from one side to the other side in the width direction.

[0118] Then, when the nozzle 46a stops at the initial position, the nozzle 56a on one side in the width direction moves by the moving portion 56c shown in FIG. 5. Specifically, in the same manner as the control of the moving portion 46c and the like by the control unit 258, the moving portion 56c and the like are controlled by the control unit 258, and all of the bonding material 110 remaining at the end portion on one side in the width direction on the inner peripheral surface 102c is removed.

[0119] Note that in the removal process of the third embodiment, unlike the removal process of the first embodiment, the moving speed of the nozzle 46a is uniform (for example, always the second speed V2 described above).

[0120] (Summary) As described above, in the method for manufacturing a reproduction substrate, in the removal step, the separation distance between the tip of the nozzle 46a and the end face 102b when water is applied to the end face 102b is made longer than the separation distance between the tip of the nozzle 46a and the end portion of the inner circumferential face 102c when water is applied to the end portion of the inner circumferential face 102c to remove the bonding material 110. Thereby, compared with the case where the separation distance between the tip of the nozzle and the end face when water is applied to the end face is the same as the separation distance between the tip of the nozzle and the end portion of the inner circumferential face 102c when water is applied to the end portion of the inner circumferential face 102c to remove the bonding material 110, the end face 102b is suppressed from being scraped by the water ejected from the nozzle 46a.

[0121] Further, in the method for manufacturing a reproduction substrate, in the removal step, after moving the nozzle 46a from the outside in the axial direction toward the inside with the separation distance between the tip of the nozzle 46a and the end face 102b as the first distance L1, the distance between the tip of the nozzle 46a and the end portion of the inner circumferential face 102c is set as a second distance L2 shorter than the first distance L1, and the nozzle 46a is moved in the reverse direction to remove the bonding material 110. After removing the bonding material 110, water ejected from the nozzle 46a is applied to the end face 102b with the distance between the tip of the nozzle 46a and the end face 102b as a third distance L3 equal to or greater than the first distance L1. Thereby, compared with the case of controlling the stop and start of the water ejected from the nozzle, the configuration becomes simple.

[0122] Regarding other operations, they are the same as those of the first embodiment except for the operations caused by the difference in the moving speed of the nozzle.

[0123] <Fourth Embodiment> An example of the method for manufacturing a reproduction substrate according to the fourth embodiment of the present disclosure will be described with reference to FIGS. 16 and 17. Regarding the fourth embodiment, mainly the parts different from the first embodiment will be described.

[0124] As shown in FIG. 2, the reproduction apparatus 310 according to the fourth embodiment includes a separation device 20, a removal device 40, a peeling device 60, an inspection device 70, and a control unit 358 that controls each device.

[0125] In the fourth embodiment, the removal process is different from the removal process of the first embodiment. The removal process of the fourth embodiment will be described below.

[0126] 〔Removal Process〕 In the removal process, when the substrate 102 with the coating film 104 is gripped by the gripping portion 42 shown in FIGS. 5 and 9, the removal device 40 operates, and each part is controlled by the control unit 358 (see FIG. 2). Note that the operations of each part described below are under the control of the control unit 358.

[0127] When the removal device 40 is operated, the drive roll 44a shown in FIG. 9 rotates at a constant rotational speed. Due to the rotation of the drive roll 44a, the substrate 102 with the coating film 104 rotates at a constant speed. Also, as the substrate 102 with the coating film 104 rotates, the driven roll 44b also rotates.

[0128] Furthermore, the pumps 46b and 56b shown in FIG. 5 operate, and water is sprayed from the nozzles 46a and 56a. Here, while the removal device 40 is operating, water is continuously sprayed from the nozzles 46a and 56a. In other words, while the removal device 40 is operating, the pumps 46b and 56b operate continuously without stopping. Note that the water sprayed from the nozzles 46a and 56a does not hit the substrate 102.

[0129] In this state, by the moving portion 46c, as shown in FIGS. 16(A) and (B), the nozzle 46a that sprays water moves from the other side in the width direction to one side. And the water sprayed by the nozzle 46a passes through the end portion (the end portion on the other side in the width direction) where the bonding material 110 remains on the inner peripheral surface 102c. In other words, the nozzle 46a moves from the outer side to the inner side in the axial direction of the substrate 102 by the moving portion 46c so as to change from the state of FIG. 16(A) to the state of FIG. 16(B). That is, the water sprayed from the nozzle 46a hits the end surface 102b of the substrate 102 on the other side in the width direction and then hits the end portion of the inner peripheral surface 102c of the substrate 102 on the other side in the width direction.

[0130] Here, the injection amount of water injected from the nozzle 46a (the injection amount of water injected from the nozzle 46a when the nozzle 46a moves from the other side in the width direction to one side) is set as the first injection amount Q1. Regarding this first injection amount Q1, it is predetermined such that even when the water injected from the nozzle 46a hits the end face 102b of the rotating base body 102, it does not impart a scratch that would cause functional damage to the end face 102b.

[0131] Also, as shown in FIGS. 16(B) and 17(A) by the moving part 46c, the nozzle 46a that is injecting water moves from one side in the width direction to the other side, and the water injected by the nozzle 46a moves past the end portion where the bonding material 110 remains on the inner peripheral surface 102c and reaches in front of the end face 102b. In other words, the moving part 46c causes the nozzle 46a to move in the reverse direction so as to change from the state of FIG. 16(B) to the state of FIG. 17(A).

[0132] Here, the injection amount of water injected from the nozzle 46a (the injection amount of water injected from the nozzle 46a when the nozzle 46a moves from one side in the width direction to the other side) is set as the second injection amount Q2, which is larger than the first injection amount Q1. Regarding this second injection amount Q2, it is predetermined such that the water injected from the nozzle 46a hits the inner peripheral surface 102c of the rotating base body 102 and removes all of the bonding material 110 remaining on the inner peripheral surface 102c. And by setting the injection amount of water injected from the nozzle 46a as the second injection amount Q2, all of the bonding material 110 remaining at the end portion on the other side in the width direction on the inner peripheral surface 102c is removed. Note that prior to the nozzle 46a moving from one side in the width direction to the other side, the injection amount of water injected from the nozzle 46a is changed from the first injection amount Q1 to the second injection amount Q2 by the pump 46b.

[0133] Further, as shown in FIGS. 17(A) and 17(B), by the moving part 46c, the nozzle 46a that is ejecting water moves from one side in the width direction (the state of FIG. 17(A)) to the other side (the state of FIG. 17(B)), and the water ejected by the nozzle 46a passes through the end face 102b of the base body 102, and the nozzle 46a stops at the initial position (the state of FIG. 17(B)). Note that even when the nozzle 46a stops at the initial position, the pump 46b continues to operate, and water continues to be ejected from the nozzle 46a. This water (the water that continues to be ejected from the nozzle 46a at the initial position) does not hit the end face 102b of the base body 102 on the other side in the width direction.

[0134] Here, the ejection amount of the water ejected from the nozzle 46a (the ejection amount of the water ejected from the nozzle 46a when the nozzle 46a moves from one side in the width direction (the state of FIG. 17(A)) to the other side (the state of FIG. 17(B))) is set to a third ejection amount Q3 that is equal to or less than the first ejection amount Q1. Regarding this third ejection amount Q3, it is determined such that even when the water ejected from the nozzle 46a hits the end face 102b of the rotating base body 102, no damage that would cause functional damage is imparted to the end face 102b. Note that the ejection amount of the water ejected from the nozzle 46a is changed from the second ejection amount Q2 to the third ejection amount Q3 by the pump 46b prior to the nozzle 46a moving from one side in the width direction (the state of FIG. 17(A)) to the other side (the state of FIG. 17(B)). The ejection amount of the water ejected from the nozzle 46a may start to be changed from the second ejection amount Q2 to the third ejection amount Q3 by the pump 46b when the nozzle 46a starts to move from one side in the width direction to the other side.

[0135] Then, when the nozzle 46a stops at the initial position, the nozzle 56a on one side in the width direction moves by the moving part 56c shown in FIG. 5. Specifically, in the same manner as the control by the control unit 358 for the moving part 46c and the like, the moving part 56c and the like are controlled by the control unit 358, and all of the bonding material 110 remaining at the end portion on one side in the width direction on the inner peripheral surface 102c is removed.

[0136] In the removal step of the fourth embodiment, unlike the removal step of the first embodiment, the moving speed of the nozzle 46a is uniform (for example, the second speed V2 mentioned above throughout).

[0137] (Summary) As described above, in the method for manufacturing a reproduction substrate, in the removal step, the injection amount of water injected from the nozzle 46a when water is applied to the end face 102b is made smaller than the injection amount of water injected from the nozzle 46a when water is applied to the end portion of the inner peripheral surface 102c to remove the bonding material 110. Thereby, compared with the case where the injection amount of water injected from the nozzle when water is applied to the end face is the same as the injection amount of water injected from the nozzle when water is applied to the end portion of the inner peripheral surface 102c to remove the bonding material 110, the end face 102b is suppressed from being scraped by the water injected from the nozzle 46a.

[0138] Also, in the method for manufacturing a reproduction substrate, in the removal step, after moving the nozzle 46a from the outside in the axial direction to the inside with the injection amount of water from the nozzle 46a as the first injection amount Q1, the nozzle 46a is moved in the reverse direction with the injection amount of water from the nozzle 46a as the second injection amount Q2 that is larger than the first injection amount Q1 to remove the bonding material 110. After removing the bonding material 110, water injected from the nozzle 46a is applied to the end face 102b with the injection amount of water from the nozzle 46a as the third injection amount Q3 that is equal to or less than the first injection amount Q1. Thereby, compared with the case of controlling the stop and start of water injected from the nozzle, the configuration becomes simple.

[0139] Regarding other operations, they are the same as those of the first embodiment except for the operations caused by the difference in the moving speed of the nozzle.

[0140] <Fifth Embodiment> An example of the method for manufacturing a reproduction substrate according to the fifth embodiment of the present disclosure will be described with reference to FIGS. 18(A) and 18(B). Regarding the fifth embodiment, mainly the parts different from the first embodiment will be described.

[0141] In the removal step of the fifth embodiment, the moving speed of the nozzle 46a is all set to the second speed V2. Further, as shown in FIGS. 18(A) and 18(B), the removal device 440 of the reproduction device 410 according to the fifth embodiment is provided with a covering member 450 that covers the end face 102b from the side of the nozzles 46a and 56a (see FIG. 5) (in FIG. 18, only one covering member 450 is shown).

[0142] This covering member 450 is in the shape of a rectangular parallelepiped extending in the depth direction and is arranged so as not to prevent the water sprayed from the nozzle 46a from hitting the inner peripheral surface 102c.

[0143] (Summary) As described above, in the method for manufacturing a reproduction substrate, in the removal step, the covering member 450 that covers the end face 102b is used. As a result, the water from the nozzles 46a and 56a does not directly hit the end face 102b, so compared with the case where the water from the nozzle directly hits the end face, the end face 102b of the substrate 102 to be reproduced is suppressed from being scraped by the water from the nozzles 46a and 56a.

[0144] <Sixth Embodiment> An example of the method for manufacturing a reproduction substrate according to the sixth embodiment of the present disclosure will be described with reference to FIGS. 19(A) and 19(B). Note that for the sixth embodiment, the parts different from the fifth embodiment will be mainly described.

[0145] As shown in FIGS. 19(A) and 19(B), the removal device 540 of the reproduction device 510 according to the sixth embodiment is provided with a covering member 550 that covers the end face 102b from the side of the nozzles 46a and 56a (see FIG. 5) (in FIG. 19, only one covering member 550 is shown).

[0146] This covering member 550 has an arcuate surface 550a that is circular when viewed from the depth direction, and is arranged so as not to prevent the water sprayed from the nozzles 46a and 56a from hitting the inner peripheral surface 102c.

[0147] (Summary) As described above, in the method for manufacturing a reproduction substrate, in the removal step, the covering member 550 that covers the end face 102b is used. As a result, since the water from the nozzles 46a and 56a does not directly hit the end face 102b, the end face 102b of the substrate 102 to be reproduced is suppressed from being scraped by the water from the nozzles 46a and 56a as compared with the case where the water from the nozzles directly hits the end face.

[0148] Although the present disclosure has been described in detail with respect to specific embodiments, it is obvious to those skilled in the art that the present disclosure is not limited to such embodiments and that various other embodiments can be taken within the scope of the present disclosure. For example, in the above embodiment, the substrate to be reproduced was the substrate 102 of the photoreceptor drum 100, but as long as it is a cylindrical substrate with an adhesive remaining on the inner peripheral surface, it may be, for example, a substrate provided on a developing roll or the like.

[0149] Further, in the above embodiment, the adhesive 110 remained at both end portions on the inner peripheral surface 102c of the substrate 102, but a substrate in which the adhesive remains only at one end portion may be reproduced.

[0150] Further, in the above embodiment, the adhesive 110 remained at both end portions on the inner peripheral surface 102c of the substrate 102. After removing the adhesive at one end portion (the end portion on the other side in the width direction) by the nozzle 46a, the adhesive at the other end portion (the end portion on one side in the width direction) was removed by the nozzle 56a. This is because when removing the adhesive at one end portion by the nozzle 46a, the water jetted from the nozzle 46a can be discharged from the opposite side (the other end portion side) of the substrate 102, and when removing the adhesive at the other end portion by the nozzle 56a, the water jetted from the nozzle 56a can be discharged from the opposite side (one end portion side) of the substrate 102. However, the nozzles 46a and 56a may be operated simultaneously to remove the adhesive at one end portion and the adhesive at the other end portion at the same time.

[0151] In the above-described embodiment, the nozzle 46a is moved in the axial direction of the base body 102 to inject water toward the end portion of the inner peripheral surface 102c. However, the nozzle may be moved in a direction different from the axial direction to inject water toward the end portion of the inner peripheral surface 102c. In this case, the effect achieved by moving the nozzle in the axial direction is not achieved.

[0152] In the above-described embodiment, water is continuously injected from the nozzle 46a. However, the injection of water may be stopped halfway. In this case, the effect achieved by continuously injecting water from the nozzle 46a is not achieved.

[0153] Although not particularly described in the above-described embodiment, the covering members 450 and 550 of the fifth and sixth embodiments may be used in the removing step described in any of the second to fourth embodiments.

[0154] (((1))) A step of separating a support from a cylindrical base body having a coating film formed on an outer peripheral surface and the support attached to an end portion by an adhesive at an end portion of an inner peripheral surface; A step of rotating the base body about an axis and applying a liquid injected from a nozzle to the end portion to remove the adhesive; A step of supporting the base body in a non-contact state with the inner peripheral surface from which the adhesive has been removed and removing the coating film on the outer peripheral surface; A method for manufacturing a regenerated base body comprising:

[0155] (((2))) In the step of removing the adhesive, while moving the nozzle in an inclined state with respect to the axial direction of the base body from the outside to the inside in the axial direction with respect to the base body, the liquid injected from the nozzle is applied to the end portion and the end surface of the base body, The moving speed of the nozzle when applying the liquid to the end surface is made faster than the moving speed of the nozzle when applying the liquid to the end portion to remove the adhesive. The method for manufacturing a regenerated base body according to ((1)).

[0156] (((3))) In the step of removing the bonding material, liquid is continuously ejected from the nozzle, After moving the nozzle from the outside to the inside in the axial direction at a first speed, the nozzle is moved in the reverse direction at a second speed slower than the first speed to remove the bonding material. After removing the bonding material, the nozzle is moved at a third speed equal to or higher than the first speed to apply the liquid ejected from the nozzle to the end face. The method for manufacturing a reproduction substrate according to ((2)).

[0157] (((4))) In the step of removing the bonding material, while moving the nozzle in a state inclined with respect to the axial direction of the substrate from the outside to the inside in the axial direction of the substrate, the liquid ejected from the nozzle is applied to the end portion and the end face of the substrate. The rotational speed of the substrate when applying the liquid to the end face is made faster than the rotational speed of the substrate when applying the liquid to the end portion to remove the bonding material. The method for manufacturing a reproduction substrate according to ((1)).

[0158] (((5))) In the step of removing the bonding material, liquid is continuously ejected from the nozzle, After rotating the substrate at a first rotational speed and moving the nozzle from the outside to the inside in the axial direction, the substrate is rotated at a second rotational speed slower than the first rotational speed and the nozzle is moved in the reverse direction to remove the bonding material. After removing the bonding material, the substrate is rotated at a third rotational speed equal to or higher than the first rotational speed to apply the liquid ejected from the nozzle to the end face. The method for manufacturing a reproduction substrate according to ((4)).

[0159] (((6))) In the step of removing the bonding material, while moving the nozzle in a state inclined with respect to the axial direction of the substrate from the outside to the inside in the axial direction of the substrate, the liquid ejected from the nozzle is applied to the end portion and the end face of the substrate. The separation distance between the tip of the nozzle and the end face when applying the liquid to the end face is made longer than the separation distance between the tip of the nozzle and the end portion when applying the liquid to the end portion to remove the bonding material. The method for manufacturing a reproduction substrate according to ((1)).

[0160] ((7)) In the step of removing the bonding material, liquid is continuously ejected from the nozzle. After moving the nozzle from the outside to the inside in the axial direction with the separation distance between the tip of the nozzle and the end face as a first distance, the nozzle is moved in the reverse direction with the distance between the tip of the nozzle and the end portion as a second distance shorter than the first distance to remove the bonding material. After removing the bonding material, the liquid ejected from the nozzle is applied to the end face with the distance between the tip of the nozzle and the end face as a third distance equal to or greater than the first distance. The method for manufacturing a reproduction substrate according to ((6)).

[0161] ((8)) In the step of removing the bonding material, while moving the nozzle in a state inclined with respect to the axial direction of the substrate from the outside to the inside in the axial direction of the substrate, the liquid ejected from the nozzle is applied to the end portion and the end face of the substrate. The ejection amount of the liquid ejected from the nozzle when applying the liquid to the end face is made less than the ejection amount of the liquid ejected from the nozzle when applying the liquid to the end portion to remove the bonding material. The method for manufacturing a reproduction substrate according to ((1)).

[0162] ((9)) After moving the nozzle from the outside to the inside in the axial direction with the ejection amount of the liquid from the nozzle as a first ejection amount, the nozzle is moved in the reverse direction with the ejection amount of the liquid from the nozzle as a second ejection amount greater than the first ejection amount to remove the bonding material. After removing the bonding material, the liquid ejected from the nozzle is applied to the end face with the ejection amount of the liquid from the nozzle as a third ejection amount equal to or less than the first ejection amount. The method for manufacturing a playback substrate according to ((8)).

[0163] (((10))) In the step of removing the bonding material, a covering member that covers the end face of the substrate from the nozzle side is used. The method for manufacturing a playback substrate according to any one of ((1)) to ((9)).

[0164] According to the method for manufacturing a playback substrate according to ((1)), it is possible to suppress the bonding material from remaining on the inner peripheral surface of the substrate to be reproduced as compared with the case where only the step of separating the support and the step of removing the coating film are provided.

[0165] According to the method for manufacturing a playback substrate according to ((2)), it is possible to suppress the end face of the substrate to be reproduced from being scraped by the liquid ejected from the nozzle as compared with the case where the moving speed of the nozzle when applying the liquid to the end face is the same as the moving speed of the nozzle when applying the liquid to the end portion to remove the bonding material.

[0166] According to the method for manufacturing a playback substrate according to ((3)), a simpler configuration can be achieved as compared with the case of controlling the stop and start of the liquid ejected from the nozzle.

[0167] According to the method for manufacturing a playback substrate according to ((4)), it is possible to suppress the end face of the substrate to be reproduced from being scraped by the liquid ejected from the nozzle as compared with the case where the rotational speed of the substrate when applying the liquid to the end face is the same as the rotational speed of the substrate when applying the liquid to the end portion to remove the bonding material.

[0168] According to the method for manufacturing a playback substrate according to ((5)), a simpler configuration can be achieved as compared with the case of controlling the stop and start of the liquid ejected from the nozzle.

[0169] According to the method for manufacturing a reproduction substrate according to ((6)), when the separation distance between the tip of the nozzle and the end face when applying the liquid to the end face is compared with the case where the separation distance between the tip of the nozzle and the end portion is the same when applying the liquid to the end portion to remove the bonding material, it is possible to suppress the end face of the reproduced substrate from being scraped by the liquid ejected from the nozzle.

[0170] According to the method for manufacturing a reproduction substrate according to ((7)), a simpler configuration can be achieved compared to the case of controlling the stop and start of the liquid ejected from the nozzle.

[0171] According to the method for manufacturing a reproduction substrate according to ((8)), when the ejection amount of the liquid from the nozzle when applying the liquid to the end face is compared with the case where the ejection amount of the liquid from the nozzle is the same when applying the liquid to the end portion to remove the bonding material, it is possible to suppress the end face of the reproduced substrate from being scraped by the liquid ejected from the nozzle.

[0172] According to the method for manufacturing a reproduction substrate according to ((9)), a simpler configuration can be achieved compared to the case of controlling the stop and start of the liquid ejected from the nozzle.

[0173] According to the method for manufacturing a reproduction substrate according to ((10)), when compared with the case of directly applying the liquid to the end face, it is possible to suppress the end face of the reproduced substrate from being scraped by the liquid ejected from the nozzle.

Explanation of Reference Numerals

[0174] 46a Nozzle 56a Nozzle 102 Substrate 102a Outer Peripheral Surface 102b End Face 102c Inner Peripheral Surface 104 Coating Film 108 Flange (an example of a support) 110 Bonding Material 450 Covering Member 550 Covering Member L1 First Distance L2 Second Distance L3 Third distance Q1 First injection volume Q2 Second injection volume Q3 Third injection volume V1 First speed V2 Second speed V3 Third speed V6 First rotational speed V7 Second rotational speed V8 Third rotational speed

Claims

1. A step of separating a support from a cylindrical substrate having a coating film formed on an outer peripheral surface and the support attached to an end portion by an adhesive at an end portion of an inner peripheral surface; A step of rotating the substrate about an axis and applying a liquid ejected from a nozzle to the end portion to remove the adhesive; A step of supporting the substrate in a non-contact state with the inner peripheral surface from which the adhesive has been removed and removing the coating film on the outer peripheral surface; A method for manufacturing a regenerated substrate comprising the above steps.

2. In the step of removing the adhesive, while moving the nozzle in an inclined state with respect to the axial direction of the substrate from the outside to the inside in the axial direction with respect to the substrate, the liquid ejected from the nozzle is applied to the end portion and the end surface of the substrate, The moving speed of the nozzle when the liquid is applied to the end surface is made faster than the moving speed of the nozzle when the liquid is applied to the end portion to remove the adhesive. The method for manufacturing a regenerated substrate according to Claim 1.

3. In the step of removing the adhesive, the liquid is continuously ejected from the nozzle. After moving the nozzle from the outside to the inside in the axial direction at a first speed, the nozzle is moved in the reverse direction at a second speed slower than the first speed to remove the adhesive. After removing the adhesive, the nozzle is moved at a third speed equal to or higher than the first speed to apply the liquid ejected from the nozzle to the end surface. The method for manufacturing a regenerated substrate according to Claim 2.

4. In the step of removing the adhesive, while moving the nozzle in an inclined state with respect to the axial direction of the substrate from the outside to the inside in the axial direction with respect to the substrate, the liquid ejected from the nozzle is applied to the end portion and the end surface of the substrate, The rotational speed of the substrate when the liquid is applied to the end surface is made faster than the rotational speed of the substrate when the liquid is applied to the end portion to remove the adhesive. The method for manufacturing a regenerated substrate according to Claim 1.

5. In the step of removing the adhesive, the liquid is continuously ejected from the nozzle. After rotating the substrate at a first rotational speed and moving the nozzle from the outside to the inside in the axial direction, the substrate is rotated at a second rotational speed slower than the first rotational speed and the nozzle is moved in the reverse direction to remove the adhesive. After removing the adhesive, the substrate is rotated at a third rotational speed equal to or higher than the first rotational speed to apply the liquid ejected from the nozzle to the end surface. The method for manufacturing a playback substrate according to claim 4.

6. In the step of removing the bonding material, while moving the nozzle in a state inclined with respect to the axial direction of the substrate from the outside to the inside in the axial direction of the substrate, the liquid sprayed from the nozzle is applied to the end portion and the end face of the substrate. The separation distance between the tip of the nozzle and the end face when the liquid is applied to the end face is made longer than the separation distance between the tip of the nozzle and the end portion when the liquid is applied to the end portion to remove the bonding material. The method for manufacturing a playback substrate according to claim 1.

7. In the step of removing the bonding material, liquid is continuously sprayed from the nozzle. After moving the nozzle from the outside to the inside in the axial direction with the separation distance between the tip of the nozzle and the end face as a first distance, the nozzle is moved in the reverse direction with the distance between the tip of the nozzle and the end portion as a second distance shorter than the first distance to remove the bonding material. After removing the bonding material, the liquid sprayed from the nozzle is applied to the end face with the distance between the tip of the nozzle and the end face as a third distance equal to or greater than the first distance. The method for manufacturing a playback substrate according to claim 6.

8. In the step of removing the bonding material, while moving the nozzle in a state inclined with respect to the axial direction of the substrate from the outside to the inside in the axial direction of the substrate, the liquid sprayed from the nozzle is applied to the end portion and the end face of the substrate. The injection amount of the liquid sprayed from the nozzle when the liquid is applied to the end face is made less than the injection amount of the liquid sprayed from the nozzles when the liquid is applied to the end portion to remove the bonding material. The method for manufacturing a playback substrate according to claim 1.

9. In the step of removing the bonding material, liquid is continuously sprayed from the nozzle. After moving the nozzle from the outside to the inside in the axial direction with the injection amount of the liquid from the nozzle as a first injection amount, the nozzle is moved in the reverse direction with the injection amount of the liquid from the nozzle as a second injection amount greater than the first injection amount to remove the bonding material. After removing the bonding material, the liquid sprayed from the nozzle is applied to the end face with the injection amount of the liquid from the nozzle as a third injection amount equal to or less than the first injection amount. The method for manufacturing a playback substrate according to claim 8.

10. In the step of removing the bonding material, a covering member that covers the end face of the substrate from the nozzle side is used. The method for manufacturing a regenerated substrate according to any one of claims 1 to 9.

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