Cleaning method and cleaning apparatus

Abstract

To provide a washing method and a washing device capable of improving workpiece washing power.SOLUTION: A washing method includes: a holding step for causing a holding part 35 to hold a coating die 10; a washing tool arrangement step for arranging a washing tool 41 so as to come in contact with the coating die 10 held by the holding part 35; an immersion step for immersing the coating die 10 in washing liquid W in a washing tank 2; and a washing step performed after the holding step, the washing tool arrangement step, and the immersion step for relatively vibrating the holding part 35 and the washing tool 41 and removing foreign matter adhering to the coating die 10 with the washing tool 41. A washing device 1 includes: the holding part 35 for holding the coating die 10; the washing tool 41 for removing foreign matter adhering to the coating die 10 held by the holding part 35; the washing tank 2 that stores the holding part 35 and the washing tool 41, and retains the washing liquid W; and a vibration source 33 for relatively vibrating the holding part 35 and the washing tool 41.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a cleaning method and a cleaning device.

Background Art

[0002] Patent Document 1 discloses a cleaning device for cleaning a coating die for coating an enamel paint on the outer periphery of a wire rod. The cleaning device described in Patent Document 1 attempts to remove the paint adhering to the coating die by non-contact ultrasonic cleaning.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When cleaning a workpiece such as a coating die by non-contact using ultrasonic cleaning as in the cleaning device described in Patent Document 1, it is conceivable that foreign matter firmly adhering to the workpiece cannot be completely removed.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a cleaning method and a cleaning device capable of improving the cleaning power of a workpiece.

Means for Solving the Problems

[0006] To achieve the above objective, the present invention provides a cleaning method for cleaning a workpiece, comprising: a holding step of holding the workpiece in a holding unit; a cleaning tool placement step of arranging a cleaning tool so as to contact the workpiece held in the holding unit; an immersion step of immersing the workpiece in a cleaning solution in a cleaning tank; and a cleaning step performed after the holding step, the cleaning tool placement step, and the immersion step, wherein the holding unit and the cleaning tool are vibrated relative to each other to remove foreign matter adhering to the workpiece with the cleaning tool.

[0007] Furthermore, in order to achieve the above objective, the present invention provides a cleaning apparatus comprising: a holding part capable of holding a workpiece; a cleaning tool for removing foreign matter adhering to the workpiece held by the holding part; a cleaning tank that houses the holding part and the cleaning tool and can store cleaning liquid; and a vibration source that causes the holding part and the cleaning tool to vibrate relative to each other. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a cleaning method and a cleaning apparatus that can improve the cleaning power of a workpiece. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view of the workpiece in the embodiment. [Figure 2] This is a cross-sectional view of the workpiece in the embodiment. [Figure 3] This is a cross-sectional view of the cleaning apparatus during workpiece cleaning in the embodiment. [Figure 4] Figure 3 shows a cross-sectional view taken along the line IV-IV. [Figure 5] This is a magnified view of the area around one of the retaining holes in Figure 4. [Figure 6] This is an exploded perspective view of the tray, holder, and cleaning tool in the embodiment. [Figure 7] This is a cross-sectional view of a cleaning apparatus showing the holding unit arrangement process in an embodiment. [Figure 8]This is a cross-sectional view of a cleaning apparatus showing the cleaning tool placement process in an embodiment. [Figure 9] This is a cross-sectional view of the cleaning apparatus in the embodiment, showing the state after the cleaning tool placement process. [Figure 10] This is a cross-sectional view of the cleaning apparatus after the immersion process in the embodiment. [Modes for carrying out the invention]

[0010] [Embodiment] Embodiments of the present invention will be described with reference to Figures 1 to 9. The embodiments described below are presented as preferred specific examples for carrying out the present invention, and while some parts specifically illustrate various technically preferable technical matters, the technical scope of the present invention is not limited to these specific embodiments.

[0011] (Work) This section describes the workpieces that are targeted for cleaning using this cleaning method. Figure 1 is a perspective view of the workpiece. Figure 2 is a cross-sectional view of the workpiece. The workpiece is used after removing any foreign matter F adhering to its surface by cleaning. In this embodiment, an example is described in which the workpiece is a paint die 10 having a through hole 101. The paint die 10 is used, for example, in the manufacture of enameled wire.

[0012] First, let's explain an example of a general manufacturing method for enameled wire. In manufacturing enameled wire, a coating formation cycle, including a painting process and a baking process, is performed multiple times on the wire while it is running. The painting process involves immersing the wire in liquid enamel paint to adhere the enamel paint to the surface of the wire, and then inserting the wire through the through hole 101 of the painting die 10 to achieve a predetermined thickness of enamel paint. The baking process involves heating the wire after the painting process to harden the enamel paint. The coating formation cycle, including the painting and baking processes, is repeated multiple times (for example, several dozen times) to obtain enameled wire with multiple layers of enamel coating. In other words, the number of coating formation cycles, including the painting and baking processes, is the same as the number of layers of enamel coating.

[0013] In the first coating cycle performed on the wire, an enamel coating is formed directly on the outer surface of the wire. Then, in subsequent coating cycles performed on the wire, another enamel coating is formed on the surface of the enamel coating formed in the previous coating cycle. Therefore, as the outer diameter of the enamel coating needs to be increased with each subsequent coating cycle, multiple coating dies 10 are used in the manufacture of enameled wire, with the same number of enamel coating layers as the number of through-holes 101, and each having a different size.

[0014] Next, we will describe the painting die 10 as the workpiece. The coating die 10 is formed with a through hole 101 for inserting a traveling wire. One end of the through hole 101 is an inlet 101a through which the traveling wire is introduced, and the other end of the through hole 101 is an outlet 101b through which the traveling wire is led out. The opening area of the inlet 101a is smaller than the opening area of the outlet 101b. And the through hole 101 has a throttle portion 101c whose flow path cross-sectional area becomes narrower from the inlet 101a side toward the outlet 101b side. In FIGS. 1 and 2, simply, an example is shown in which the entire through hole 101 is the throttle portion 101c and the cross-sectional shape of the through hole 101 is a perfect circle shape, but the shape of the through hole 101 is not limited to this. For example, the coating die 10 for manufacturing a rectangular enameled wire has a cross-sectional shape of the through hole 101 corresponding to the cross-sectional shape of the rectangular wire strand.

[0015] Also, the coating die 10 has a flange portion 102 that protrudes to the outer peripheral side at the end on the inlet 101a side in the axial direction. The flange portion 102 is a part for fixing the coating die 10 to a predetermined installation location of the enameled wire manufacturing apparatus.

[0016] As shown in FIG. 2, foreign matter F may adhere to the inner surface 101d of the through hole 101 of the coating die 10 used for manufacturing the enameled wire. As the foreign matter F, it is assumed that the enamel paint adheres to the inner surface 101d of the through hole 101. When manufacturing an enameled wire using the coating die 10 with foreign matter F adhering to the inner surface 101d of the through hole 101, the shape of the enamel paint on the traveling wire passing through the coating die 10 may be different from the desired shape, so the foreign matter F on the inner surface 101d of the through hole 101 needs to be removed.

[0017] As described above, the coating die 10 has been described as the work to be cleaned by the cleaning method of this embodiment, but it is only an example, and various coating dies for coating an insulating paint on the outer periphery of a conducting wire can be adopted as the coating die to be cleaned. Also, the work may be a die other than the coating die 10 (for example, a die for wire drawing), or a component or the like that requires cleaning other than a die.

[0018] (Washing device 1) Next, the cleaning apparatus 1 for paint dies 10 will be described with reference to Figures 3 to 6. Figure 3 is a cross-sectional view of the cleaning apparatus 1 during cleaning of multiple paint dies 10. Figure 4 is a cross-sectional view taken along the line IV-IV in Figure 3. Figure 5 is an enlarged view of the area around one of the holding holes 351 in Figure 4. Figure 6 is an exploded perspective view of the receiving tray 34, the holding part 35, and the cleaning tool 41. As will be described later, some parts of the cleaning apparatus 1 are removable from the cleaning tank 2, but in this embodiment, unless otherwise specified, the cleaning apparatus will be described in the state in which each part of the cleaning apparatus 1 is attached to the cleaning tank 2. Also, hereafter, the expression "up and down" will mean up and down in the vertical direction. For example, the up and down direction in Figure 3 is the vertical direction.

[0019] As shown in Figure 3, the cleaning device 1 comprises a cleaning tank 2 for storing cleaning liquid W, a holding part 35 that is immersed in the cleaning liquid W and capable of holding a plurality of paint dies 10, a cleaning tool 41 for removing foreign matter F (see Figure 2) adhering to the plurality of paint dies 10 held in the holding part 35, and a vibration source 33 for causing relative vibration between the holding part 35 and the cleaning tool 41. The cleaning device 1 generates relative vibration between the holding part 35 and the cleaning tool 41 using the vibration source 33, so that, as shown in Figure 5, the cleaning tool 41 rubs against the inner surface 101d of the paint dies 10 held in the holding part 35, thereby removing foreign matter from the inner surface 101d of the paint dies 10. In this embodiment, an example is described in which the vibration source 33 vibrates the holding part 35 but does not vibrate the cleaning tool 41. However, it is sufficient that the holding part 35 and the cleaning tool 41 can vibrate relative to each other, and for example, a configuration in which the cleaning tool 41 is vibrated but the holding part 35 is not may be adopted.

[0020] As shown in Figures 3 and 4, in this embodiment, the cleaning device 1 includes a cleaning tank 2, a vibrating assembly 3 attached to the cleaning tank 2 and vibrating integrally with it, and a stationary assembly 4 attached to the cleaning tank 2 and not vibrating. Hereafter, each part of the cleaning device 1 will be described in detail.

[0021] As shown in Figure 3, the cleaning tank 2 comprises a tank body 21 with an opening 211 formed at the top, and a lid 23 that closes the opening 211 of the tank body 21 via a sealing portion 22. The tank body 21 has a bottom wall 212 and side walls 213 erected from the periphery of the bottom wall 212. The bottom wall 212 has an inclined wall 212a that is inclined with respect to the horizontal plane. As a result, the cleaning tank 2 gradually deepens from the upper end to the lower end of the inclined wall 212a. The cleaning liquid W is stored in the cleaning tank 2, for example, up to near the uppermost position of the inclined wall 212a. At the deepest point of the cleaning tank 2, a discharge channel 11 and a discharge valve 12 for discharging the used cleaning liquid W from the cleaning tank 2 are connected. A vibration assembly 3 is attached to the inclined wall 212a.

[0022] The vibration assembly 3 comprises a vibration platform 31, a connecting member 32, a vibration source 33, a receiving plate 34, and a holding part 35. The vibration platform 31 is attached to the inclined wall 212a via an elastic body 13. The elastic body 13 is elastically deformable in a direction perpendicular to the inclined wall 212a and can be, for example, a coil spring. A connecting member 32 is fixed to the vibration platform 31 on the side opposite to the inclined wall 212a, connecting the vibration platform 31 and the vibration source 33.

[0023] The connecting member 32 has a first portion 321 fixed to the vibration table 31 and a second portion 322 fixed to the vibration source 33. The first portion 321 overlaps with the side of the vibration table 31 opposite to the inclined wall 212a. The first portion 321 is fixed to the highest position of the vibration table 31 so that the vibration source 33 connected to the second portion 322 is positioned outside the cleaning fluid W. The second portion 322 is erected upward from the first portion 321 and is inclined relative to the first portion 321.

[0024] The vibration source 33 is non-electric. By making the vibration source 33 non-electric, it is not necessary to make the vibration source 33 pressure-resistant explosion-proof even when a flammable solvent is used as the cleaning fluid W. In this embodiment, the vibration source 33 is an air vibrator that generates vibration by air pressure. Air is introduced into the vibration source 33 via an air introduction tube 331 and discharged via an air discharge tube 332. The side wall 213 of the cleaning tank 2 is provided with a partition joint 14 to which the air introduction tube 331 is connected and a partition joint 15 to which the air discharge tube 332 is connected, thereby allowing air to flow through the side wall 213 of the cleaning tank 2. The vibration source 33 generates vibration by the piston movement of an internal piston (not shown) caused by air pressure.

[0025] The vibration source 33 is fixed to the second portion 322 of the connecting member 32 in a position that allows it to vibrate horizontally. As described above, the first portion 321 and the second portion 322 of the connecting member 32 are inclined relative to each other, so the horizontal vibrations emitted by the vibration source 33 are converted to a direction perpendicular to the inclined wall 212a and transmitted to the vibration table 31. Therefore, when the vibration source 33 is ON, the vibration assembly 3 vibrates in a direction perpendicular to the inclined wall 212a.

[0026] As shown in Figures 3 and 4, a receiving tray 34 is positioned on the side of the vibration table 31 opposite to the inclined wall 212a. The receiving tray 34 has a plate wall 341 positioned facing the vibration table 31, and an annular enclosure wall 342 erected from the plate wall 341 on the side opposite to the inclined wall 212a. The receiving tray 34 collects foreign matter peeled off from the paint dies 10 inside the enclosure wall 342. Although detailed illustrations are omitted, the receiving tray 34 is fixed to the vibration table 31 in a way that allows for one-touch attachment and detachment. This makes it easier to insert and remove multiple paint dies 10 into and out of the cleaning tank 2, as will be described later. Here, "one-touch attachment and detachment" means that it can be attached and detached by hand with a single action, such as turning or pushing, without using tools. The receiving tray 34 may also be fixed to the vibration table 31 with bolts or the like. As shown in Figure 6, a boss portion 343 for fixing the retaining portion 35 is erected on the inside of the enclosure wall 342 in the plate wall portion 341. The retaining portion 35 is fastened to the boss portion 343 using bolts B1.

[0027] As shown in Figures 3, 4, and 6, the holding portion 35 has multiple holding holes 351 for holding multiple paint dies 10. In this embodiment, the holding portion 35 has multiple holding holes 351 arranged in parallel. Specifically, the holding portion 35 has a total of 40 holding holes 351 arranged in 5 rows and 8 columns. This is because the purpose is to be able to simultaneously hold 40 paint dies 10 used when manufacturing enameled wire having 40 layers of enamel coating. The number of holding holes 351 is not limited to this, but it is preferable to have multiple holding holes 351 from the viewpoint of simultaneously cleaning multiple paint dies 10.

[0028] As shown in Figure 5, the retaining hole 351 is formed to a size that allows the painting die 10 to be loosely fitted. That is, the painting die 10 is not fixed in the retaining hole 351, but is movable within the retaining hole 351. The inner surface 352 of the retaining hole 351 is formed in a stepped shape. Specifically, the inner surface 352 of the retaining hole 351 has a large-diameter inner surface 352a, a small-diameter inner surface 352b which is located closer to the inclined wall 212a than the large-diameter inner surface 352a and has a smaller diameter than the large-diameter inner surface 352a, and a stepped surface 352c between the large-diameter inner surface 352a and the small-diameter inner surface 352b. The painting die 10 is held in the retaining hole 351 by placing the flange portion 102 on the stepped surface 352c. When the painting die 10 is held in the retaining hole 351, a gap is formed between the large-diameter inner surface 352a and the small-diameter inner surface 352b and the painting die 10. The shape of the holding hole 351 can be any shape that can hold the workpiece, and can be varied depending on the shape of the workpiece being targeted.

[0029] As shown in Figures 3 and 4, a stationary assembly 4 fixed to the cleaning tank 2 is positioned on the side of the holding portion 35 opposite to the inclined wall 212a. The stationary assembly 4 includes a cleaning tool 41 and a mounting plate 42.

[0030] The cleaning tool 41 has a plate-shaped base 411 and cleaning sections 412 protruding from the base 411, the same number as the holding holes 351 (i.e., 40). The cleaning sections 412 only need to be capable of scrubbing off foreign matter adhering to the workpiece. The cleaning sections 412 may be detachably attached to the base 411. This allows the cleaning effect of the cleaning sections 412 to be maintained by replacing the cleaning sections 412 in the cleaning tool 41. The number and position of the cleaning sections 412 may also be set according to the number and position of the workpieces held in the holding holes 351. In this embodiment, the cleaning section 412 is shown as an example of a brush made of multiple fibrous members (i.e., bristles), but it may also be a sponge or the like. Multiple cleaning sections 412 are inserted into through holes 101 of multiple painting dies 10 held in the holding section 35. The cleaning sections 412 have a length that extends through the through holes 101. As shown in Figure 6, when no external force is applied to the cleaning section 412, the multiple bristles constituting each cleaning section 412 are formed in an inverse tapered shape so that they spread out as they move away from the base 411. On the other hand, as shown in Figures 3 to 5, when the cleaning section 412 is inserted into the through hole 101 of the painting die 10, it deforms to a shape corresponding to the shape of the through hole 101.

[0031] As shown in Figure 4, the mounting plate 42 is positioned on the side of the base 411 opposite to the cleaning section 412. The mounting plate 42 and the cleaning tool 41 are fixed together using bolts B2 and nuts N. The mounting plate 42 is attached to a fixed wall 214 formed in the cleaning tank 2. Although detailed illustrations are omitted, the mounting plate 42 is fixed to the fixed wall 214 in a way that allows for one-touch attachment and detachment. Since the stationary assembly 4 and the fixed wall 214 need to be attached and detached each time a workpiece is cleaned, the convenience is improved by making the fixing of the mounting plate 42 to the fixed wall 214 a one-touch operation. Alternatively, the mounting plate 42 may be fixed to the fixed wall 214 using bolts or the like.

[0032] Each part of the cleaning device 1 is made of a material that does not dissolve in the cleaning solution W. If, for example, N-methylpyrrolidone (NMP) is used as the cleaning solution W, the cleaning part 412 (i.e., the brush) may be made of fluororesin, polyphenylene sulfide (PPS), other engineering plastics, or super engineering plastics.

[0033] (Cleaning method) Next, a cleaning method for the painting die 10 of this embodiment will be described using Figures 7 to 10. The cleaning method consists of a holding step, a holding unit placement step, a cleaning tool placement step, an immersion step, and a cleaning step, which are performed in order.

[0034] The holding process involves holding the paint dies 10 in the holding part 35. In this embodiment, multiple paint dies 10 are held in the holding part 35, which is fixed to the receiving tray part 34. The paint dies 10 are held in the holding hole 351 with the inlet 101a facing away from the inclined wall 212a. Hereafter, the holding part 35 and the receiving tray part 34, which are fixed to each other, will be referred to as the holding unit 16.

[0035] Next, as shown in Figure 7, in the holding unit placement process, the holding unit 16, which holds multiple painting dies 10, is fixed to the vibration table 31 in the washing tank 2. This fixing is performed with a single touch, as described above.

[0036] Next, as shown in Figures 8 and 9, in the cleaning tool placement step, the cleaning tools 41 and mounting plate 42 (i.e., the stationary assembly 4), which are fixed to each other, are fixed to the fixed wall 214 of the cleaning tank 2. This fixing is also done with a single touch, as described above. At this time, the multiple cleaning parts 412 of the cleaning tool 41 are inserted into the through holes 101 of the multiple painting dies 10, so that the cleaning tool 41 comes into contact with the inner surface 101d of the through holes 101.

[0037] Next, as shown in Figure 10, in the immersion process, cleaning liquid W is poured from the opening 211 of the cleaning tank 2. In this embodiment, cleaning liquid W is a solvent for enamel paint and is a flammable solvent. Specifically, cleaning liquid W is N-methylpyrrolidone (NMP). The cleaning liquid W is poured up to a level (for example, the uppermost position of the inclined wall 212a) where all the paint dies 10 held in the holding part 35 are immersed in the cleaning liquid W, and the vibration source 33 is not immersed in the cleaning liquid W. By providing an inclined wall 212a in the cleaning tank 2, the amount of cleaning liquid W required to immerse multiple paint dies 10 can be reduced. At least a part of the vibration source 33 may be immersed in the cleaning liquid W. After the cleaning liquid W is poured into the cleaning tank 2, the opening 211 of the tank body 21 of the cleaning tank 2 is closed by the seal part 22 and the lid 23.

[0038] Next, a cleaning process is carried out. In the cleaning process, the vibration source 33 is vibrated as shown in Figure 3. This causes the holding part 35 and the multiple painting dies 10 held therein to vibrate in a direction perpendicular to the inclined wall 212a (i.e., in the axial direction of the painting die 10). This causes friction between the painting die 10 and the cleaning tool 41, removing foreign matter adhering to the inner surface 101d of the through hole 101 of the painting die 10. Here, as mentioned above, the painting die 10 is not fixed in the holding hole 351 but is merely loosely fitted, so during the cleaning process, the painting die 10 can move freely relative to the holding hole 351. This movement, combined with other factors, makes it easier to remove foreign matter F adhering to the painting die 10. The removed foreign matter falls into the surrounding wall 342 of the receiving tray part 34 and is collected.

[0039] As described above, multiple paint dies 10 are cleaned simultaneously.

[0040] After cleaning the multiple paint dies 10, the holding unit 16 that holds the multiple paint dies 10 is removed from the vibration table 31 with a single touch. The multiple paint dies 10 may be stored while still held in the holding unit 16. Alternatively, the next step (for example, a step to remove the cleaning solution W adhering to the multiple paint dies 10) may be performed in this state.

[0041] (Operation and Effects of the Embodiment) The cleaning method of this embodiment comprises a holding step of holding a workpiece in a holding part 35, an immersion step of immersing the workpiece in a cleaning liquid W, a cleaning tool placement step of positioning a cleaning tool 41 so as to contact the workpiece held in the holding part 35, and a cleaning step performed after the holding step, the cleaning tool placement step and the immersion step, in which the holding part 35 and the cleaning tool 41 are vibrated relative to each other to remove foreign matter F adhering to the workpiece with the cleaning tool 41. Therefore, since foreign matter F adhering to the workpiece can be physically removed by the cleaning tool 41, the cleaning power of the workpiece is improved.

[0042] Furthermore, during the holding process, multiple workpieces are held in the holding section 35, and during the cleaning process, multiple workpieces are cleaned simultaneously by the cleaning tool 41. Therefore, it is easy to shorten the cleaning time for multiple workpieces.

[0043] Furthermore, the cleaning solution W is a flammable solvent that dissolves foreign matter F, and during the cleaning process, the holding part 35 and the cleaning tool 41 are vibrated relative to each other using a non-electric vibration source 33. When a flammable solvent is used as the cleaning solution W, if an electric vibration source 33 is placed inside the cleaning tank 2, the vibration source 33 would need to be explosion-proof, but this is not necessary in this embodiment.

[0044] Furthermore, the workpiece is a die having a through hole 101 (in this embodiment, a painting die 10 in particular), and in the cleaning process, at least the inner surface 101d of the workpiece is cleaned with a cleaning tool 41. Since the removal of foreign matter F from the inner surface 101d of the painting die 10 is strongly required, the cleaning method of this embodiment is preferably implemented for cleaning the inner surface 101d of the painting die 10.

[0045] Furthermore, during the cleaning process, the holding part 35 and the cleaning tool 41 are vibrated relative to each other in the axial direction of the painting die 10. Therefore, foreign matter F adhering to the inner surface 101d of the painting die 10 is easily removed.

[0046] Furthermore, during the holding process, the workpiece is loosely fitted into the holding part 35. Therefore, the workpiece moves freely during the cleaning process, and this movement, combined with other factors, makes it easier to remove foreign matter F adhering to the workpiece.

[0047] Furthermore, the holding portion 35 (specifically the holding portion 35 and the receiving tray portion 34) is detachably fixed to the cleaning tank 2. Therefore, since multiple workpieces are held in the holding portion 35 and then moved in and out of the cleaning tank 2, it becomes easy to move multiple workpieces in and out of the cleaning tank 2.

[0048] As described above, this embodiment provides a cleaning method and cleaning apparatus that can improve the cleaning power of the workpiece.

[0049] (Summary of the embodiments) Next, the technical concept understood from the embodiments described above will be described using the reference numerals and other symbols from the embodiments. However, the reference numerals and other symbols in the following description are not limited to the components in the claims that are specifically shown in the embodiments.

[0050] [1] A cleaning method for cleaning a workpiece, comprising: a holding step of holding the workpiece in a holding part (35); a cleaning tool placement step of arranging a cleaning tool (41) so as to contact the workpiece held in the holding part (35); an immersion step of immersing the workpiece in a cleaning liquid (W) in a cleaning tank (2); and a cleaning step performed after the holding step, the cleaning tool placement step and the immersion step, of vibrating the holding part (35) and the cleaning tool (41) relative to each other to remove foreign matter (F) adhering to the workpiece with the cleaning tool (41).

[0051] [2] The cleaning method according to [1], wherein in the holding step, a plurality of workpieces are held in the holding part (35), and in the cleaning step, the plurality of workpieces are cleaned simultaneously with the cleaning tool (41).

[0052] [3] The cleaning method according to [1] or [2], wherein the cleaning liquid (W) is a flammable solvent that dissolves the foreign matter (F), and in the cleaning step, the holding part (35) and the cleaning tool (41) are vibrated relative to each other using a non-electric vibration source (33).

[0053] [4] The cleaning method according to [3], wherein the non-electric vibration source (33) is an air vibrator.

[0054] [5] The cleaning method according to any one of [1] to [4], wherein the workpiece is a die (10) having a through hole (101), and in the cleaning step, at least the inner surface (101d) of the workpiece is cleaned with the cleaning tool (41).

[0055] [6] The cleaning method according to [5], wherein in the cleaning step, the holding part (35) and the cleaning tool (41) are vibrated relative to each other in the axial direction of the die (10).

[0056] [7] The cleaning method according to any one of [1] to [6], wherein in the holding step, the workpiece is loosely fitted into the holding portion (35).

[0057] [8] The holding portion (35) is detachably fixed to the cleaning tank (2) [1] to [7] the cleaning method according to any one of these.

[0058] [9] A cleaning device (1) comprising: a holding part (35) capable of holding a workpiece; a cleaning tool (41) for removing foreign matter (F) adhering to the workpiece held by the holding part (35); a cleaning tank (2) that houses the holding part (35) and the cleaning tool (41) and is capable of storing a cleaning liquid (W); and a vibration source (33) for causing the holding part (35) and the cleaning tool (41) to vibrate relative to each other.

[0059]

[10] The cleaning device (1) according to [9], wherein the holding portion (35) has a plurality of holding holes (351) capable of holding a plurality of workpieces, and the cleaning tool (41) has a plurality of cleaning portions (412) for simultaneously cleaning the plurality of workpieces held in the plurality of holding holes (351).

[0060]

[11] The cleaning device (1) according to [9] or

[10] , wherein the vibration source (33) is non-electric.

[0061]

[12] The cleaning device (1) according to

[11] , wherein the vibration source (33) is an air vibrator.

[0062]

[13] The holding portion (35) is detachably fixed to the cleaning tank (2), as described in [9] or

[10] , the cleaning device (1).

[0063] (Note) Although embodiments of the present invention have been described above, the embodiments described herein do not limit the invention as defined in the claims. Furthermore, it should be noted that not all combinations of features described in the embodiments are necessarily essential for solving the problem of the invention. Moreover, the present invention can be implemented with appropriate modifications without departing from its spirit. [Explanation of symbols]

[0064] 1…Washing device 10... Dice 101…Through hole 101d...Inner self 2…Washing tank 33...Vibration source 35...Holding part 351…Retaining hole 41… Cleaning tools 412... Cleaning section F...Foreign object W... Cleaning solution

Claims

1. A cleaning method for cleaning a workpiece, A holding step of holding the workpiece in the holding part, A cleaning tool placement step involves arranging the cleaning tool so as to contact the workpiece held in the holding portion, The process involves immersing the workpiece in a cleaning solution in a cleaning tank, The cleaning step, performed after the holding step, the cleaning tool placement step, and the immersion step, includes a cleaning step in which the holding part is vibrated via a vibration platform positioned at an inclination with respect to the horizontal plane, thereby causing relative vibration between the holding part and the cleaning tool to remove foreign matter adhering to the workpiece with the cleaning tool. Cleaning method.

2. In the holding step, a plurality of workpieces are held in the holding section. In the cleaning process, the multiple workpieces are cleaned simultaneously with the cleaning tool. The cleaning method according to claim 1.

3. The cleaning solution is a flammable solvent that dissolves the foreign matter. In the cleaning process, the holding part and the cleaning tool are vibrated relative to each other using a non-electric vibration source. The cleaning method according to claim 1 or 2.

4. The aforementioned non-electric vibration source is an air vibrator. The cleaning method according to claim 3.

5. The workpiece is a die having a through hole, In the cleaning step, at least the inner surface of the workpiece is cleaned with the cleaning tool. The cleaning method according to claim 1 or 2.

6. In the cleaning step, the holding part and the cleaning tool are vibrated relative to each other in the axial direction of the die. The cleaning method according to claim 5.

7. In the holding step, the workpiece is loosely fitted into the holding portion. The cleaning method according to claim 1 or 2.

8. The holding part is detachably fixed to the washing tank. The cleaning method according to claim 1 or 2.

9. A holding section capable of holding a workpiece, A cleaning tool for removing foreign matter adhering to the workpiece held in the holding part, A cleaning tank that houses the holding part and the cleaning tool and can store cleaning liquid, A vibration source that causes the holding part and the cleaning tool to vibrate relative to each other, The system includes an excitation table that is inclined with respect to the horizontal plane and transmits vibrations from the vibration source to the holding part. Washing device.

10. The holding portion has multiple holding holes capable of holding multiple workpieces, The cleaning tool has multiple cleaning units that simultaneously clean the multiple workpieces held in the multiple holding holes. The cleaning apparatus according to claim 9.

11. The vibration source is non-motorized. The cleaning apparatus according to claim 9 or 10.

12. The vibration source is an air vibrator. The cleaning apparatus according to claim 11.

13. The holding part is detachably fixed to the washing tank. The cleaning apparatus according to claim 9 or 10.

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