CN217289439U

CN217289439U - Cleaning device and pole piece production line

Info

Publication number: CN217289439U
Application number: CN202220880578.0U
Authority: CN
Inventors: 王彬
Original assignee: Sany Technology Equipment Co Ltd
Current assignee: Sany Technology Equipment Co Ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-08-26
Anticipated expiration: 2032-04-14

Abstract

The utility model relates to a clean technical field of battery sheet, concretely relates to cleaning device and pole piece production line. The cleaning device includes: a drive mechanism; the cleaning mechanism is in transmission connection with the driving mechanism and comprises a magnetic rod and a cleaning part, at least part of the cleaning part is sleeved on the periphery of the magnetic rod, the magnetic rod can rotate around the axis of the cleaning part under the driving of the driving mechanism, and the cleaning part can move along the axis direction of the magnetic rod under the driving of the driving mechanism. The utility model discloses a cleaning device can clean the pole piece through the bar magnet, can sweep away iron fillings and magnetic particle on the bar magnet through the cleaning part again, realizes that the automation of bar magnet is clean, efficient, and the bar magnet can be followed self axis rotation simultaneously and strengthened cleaning dynamics and clean effect with the cleaning part of motion cooperatees.

Description

Cleaning device and pole piece production line

Technical Field

The utility model relates to a clean technical field of battery sheet, concretely relates to cleaning device and pole piece production line.

Background

The production process of the battery pole piece is easy to stick scrap iron, magnetic particles and other impurities, if the impurities are not removed, the impurities possibly pierce through a diaphragm to cause battery failure and affect the use safety of the battery, the magnetic substance can also affect the electrochemical performance and the safety performance of the battery, the self-discharge of the battery is caused slightly, the scrap iron or the magnetic particles on the surface of the pole piece are removed seriously, and even the explosion of the battery is caused, so the scrap iron or the magnetic particles on the surface of the pole piece is required to be removed in the production process of the battery.

The existing cleaning of the pole piece is generally realized by arranging a magnetic rod at a position close to the pole piece on a tape walking path, and the magnetic rod adsorbs iron chips and magnetic particles to a magnet, so that the pole piece is cleaned.

However, the prior art has the following defects: scrap iron and magnetic particles on the magnetic bar need to be cleaned in time, otherwise, secondary pollution can be caused due to excessive accumulation; when the magnetic bar is cleaned and stopped, the cleaning cloth is manually used for wiping, so that the efficiency is low, the process is uncontrollable, and the cleaning effect is poor.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming prior art's cleaning device and cleaning inefficiency, clean the poor defect of effect to a cleaning device and pole piece production line that clean efficient, clean effectual is provided.

In order to solve the above problem, the utility model provides a cleaning device, it includes: a drive mechanism; the cleaning mechanism is in transmission connection with the driving mechanism and comprises a magnetic rod and a cleaning part, at least part of the cleaning part is sleeved on the periphery of the magnetic rod, the magnetic rod can rotate around the axis of the cleaning part under the driving of the driving mechanism, and the cleaning part can move along the axis direction of the magnetic rod under the driving of the driving mechanism.

As a preferable aspect of the cleaning device, the drive mechanism includes: a drive motor; the lead screw is in transmission connection with the driving motor; and the sliding support is in transmission connection with the lead screw and is fixedly connected with the cleaning part.

As a preferred technical scheme of the cleaning device, the driving mechanism further comprises a transmission assembly, and the magnetic rod is in transmission connection with the driving motor through the transmission assembly.

As a preferred technical scheme of the cleaning device, the transmission assembly comprises a first transmission wheel, a transmission belt and a second transmission wheel, the first transmission wheel is fixed on the lead screw, the second transmission wheel is fixed on the magnetic bar, and the transmission belt is rotatably sleeved on the first transmission wheel and the second transmission wheel.

As a preferred technical scheme of the cleaning device, the driving motor is a forward and reverse rotating motor or the lead screw is a bidirectional lead screw.

As a preferred technical scheme of cleaning device, cleaning portion is the arc piece, and it sets up in the bar magnet one side of keeping away from the pole piece.

As a preferable mode of the cleaning device, the cleaning mechanism further includes a dust collection cover which covers an outer periphery of the cleaning portion, a cleaning gap is formed between the cleaning portion and the dust collection cover along a movement direction of the cleaning portion, and an avoidance gap is provided between the dust collection cover and a surface of the magnetic rod.

As a preferred technical scheme of the cleaning device, one surface of the cleaning part, which is abutted against the magnetic rod, is provided with a plurality of arc-shaped strip-shaped protruding parts, and the arc-shaped strip-shaped protruding parts are matched with the arc-shaped surface of the magnetic rod.

As a preferred technical scheme of the cleaning device, at least one of two ends of the magnetic rod is provided with a non-magnetic section.

The utility model also provides a pole piece production line, it includes as before cleaning device.

The utility model has the advantages of it is following:

1. the utility model discloses a cleaning device adsorbs iron fillings and magnetic particle on the pole piece through the bar magnet that cleans in the mechanism to the realization is to the cleanness of pole piece, cleans the motion of the portion of cleaning in the mechanism along bar magnet axis direction under the actuating mechanism drive in order to clean iron fillings and magnetic particle on the bar magnet, realizes the automatic cleanness to the bar magnet, efficient, the bar magnet rotates along self axis under the actuating mechanism drive simultaneously, cleaning the dynamics and clean effect have been strengthened in coordination with the portion of cleaning of motion.

2. The utility model discloses a cleaning device, driving motor drive bar magnet and cleaning portion simultaneous movement both make motion synchronization, simplify the drive structure again, reduce the device volume.

3. The utility model discloses a cleaning device establishes driving motor to positive reverse motor or establishes the lead screw to two-way lead screw to realize the reciprocating motion of cleaning portion, realize further promoting and clean efficiency to the reciprocal cleaning of bar magnet.

4. The utility model discloses a cleaning device establishes the cleaning portion to the arc piece, and it sets up in one side that the pole piece was kept away from to the bar magnet, makes the bar magnet can normally adsorb the cleanness to the pole piece and realize cleaning the bar magnet when one side of pole piece, improves pole piece production efficiency.

5. The utility model discloses a cleaning device, still include the dust cage, the dust cage cladding is in the periphery of cleaning portion, the direction of motion along cleaning portion forms between cleaning portion and dust cage and cleans the clearance, and be equipped with between dust cage and bar magnet surface and dodge the clearance, the interference of dust cage to cleaning portion has both been avoided, can in time accomodate the dust cage with iron fillings and the magnetic particle that cleaning portion swept away again through cleaning the clearance in, when cleaning portion moves to no magnetic section, iron fillings and magnetic particle drop to and realize storing in the dust cage, avoid flying upward.

6. The utility model discloses a cleaning device is equipped with a plurality of arc strip bellyings in the one side of cleaning portion and bar magnet butt to arc strip bellyings and the arc surface looks adaptation of bar magnet, with this, when the cleaning portion moved along the bar magnet, a plurality of arc strip bellyings can play the purpose of cleaning many times to the same position of bar magnet, have further strengthened and have cleaned the effect.

7. The utility model discloses a pole piece production line, including foretell cleaning device, it has realized the cleanness to the pole piece, can also automize to the bar magnet simultaneously and clean, clean efficient, clean effectual.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 shows a schematic view of the overall structure of a cleaning device according to an embodiment of the present invention;

fig. 2 is a partially enlarged schematic structural view of a driving mechanism in a cleaning device according to an embodiment of the present invention;

fig. 3 is a side view of a sweeping mechanism in a cleaning apparatus according to an embodiment of the present invention;

fig. 4 is a front view of a sweeping mechanism in a cleaning device according to an embodiment of the present invention.

Description of the reference numerals:

1. a drive mechanism; 11. a drive motor; 12. a lead screw; 13. a sliding support; 14. a transmission assembly; 141. a first drive pulley; 142. a transmission belt; 143. a second transmission wheel; 2. a cleaning mechanism; 21. a magnetic bar; 211. a non-magnetic section; 22. a cleaning part; 221. an arc-shaped strip-shaped protruding part; 23. a dust collection cover; 231. a dust collecting port; 232. avoiding the gap; 233. clearing the clearance; 100. and (6) pole pieces.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1-4, the embodiment of the utility model discloses a cleaning device, including actuating mechanism 1 and cleaning mechanism 2, wherein, cleaning mechanism 2 is connected with actuating mechanism 1 transmission, and cleaning mechanism 2 includes bar magnet 21 and cleaning portion 22, and cleaning portion 22 at least part cup joints in the periphery of bar magnet 21, and bar magnet 21 can rotate around self axis under actuating mechanism 1 drives, and cleaning portion 22 can move along the axis direction of bar magnet 21 under actuating mechanism 1's drive.

The utility model discloses a cleaning device can clean pole piece 100 through bar magnet 21, can sweep iron fillings and magnetic particle on the bar magnet 21 through cleaning part 22 again, realizes that automatic clean, the efficient of bar magnet 21, and bar magnet 21 can be followed self axis rotation simultaneously and has strengthened cleaning dynamics and clean effect with the cleaning part 22 of motion in coordination.

The structure of the cleaning device will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the driving mechanism 1 includes a driving motor 11, a lead screw 12, and a sliding bracket 13, wherein the lead screw 12 is in transmission connection with the driving motor 11, the sliding bracket 13 is in transmission connection with the lead screw 12, and the sliding bracket 13 is fixedly connected with the cleaning part 22. Through driving motor 11 drive lead screw 12 and rotate to drive sliding support 13 along the axis motion of lead screw 12, and then drive cleaning portion 22 on the sliding support 13 along the axis motion of lead screw 12, cleaning portion 22 can also the limiting displacement to sliding support 13 simultaneously, avoids sliding support 13 along the circumferential direction of lead screw 12.

In this embodiment, the driving motor 11 is a forward and reverse rotation motor, and forward rotation or reverse rotation of the screw 12 is realized by forward rotation or reverse rotation of the driving motor 11, so as to drive the cleaning portion 22 to perform reciprocating motion, so as to realize reciprocating cleaning of the magnetic rod 21, and improve cleaning efficiency.

The screw 12 is arranged parallel to the magnetic bar 21, the screw 12 is a standard component, and the detailed structure is not described herein.

The sliding support 13 is in threaded fit with the lead screw 12, so that the rotation of the lead screw 12 is converted into the linear motion of the sliding support 13 along the lead screw 12, and finally, the motion of the cleaning part 22 along the magnetic bar 21 is realized, and the automatic cleaning of the magnetic bar 21 is realized.

As a preferred technical solution of the cleaning device of the present embodiment, as shown in fig. 2, the driving mechanism 1 further includes a transmission assembly 14, and the magnetic rod 21 is in transmission connection with the driving motor 11 through the transmission assembly 14. The driving motor 11 of the embodiment can drive the cleaning part 22 to move through the lead screw 12, and can drive the magnetic rod 21 to rotate through the transmission assembly 14, so that the cleaning part 22 and the magnetic rod 21 synchronously move, the driving structure is simplified, and the volume of the device is reduced.

Specifically, the transmission assembly 14 includes a first transmission wheel 141, a transmission belt 142 and a second transmission wheel 143, the first transmission wheel 141 is fixed on the screw rod 12, the second transmission wheel 143 is fixed on the magnetic rod 21, and the transmission belt 142 is rotatably sleeved on the first transmission wheel 141 and the second transmission wheel 143. The screw 12 is driven by the driving motor 11 to rotate, so as to drive the first driving wheel 141 thereon to rotate, and further drive the second driving wheel 143 to rotate through the driving belt 142, and finally drive the magnetic bar 21 to rotate.

It should be noted that, under the condition that the transmission ratio of the transmission assembly 14 is constant, the distance that the cleaning part 22 moves transversely and the angle that the magnetic rod 21 rotates are determined by one rotation of the screw 12, and when the transmission ratio and the lead of the screw 12 are in a certain fixed ratio, the magnetic rod 21 rotates to the same angle every time the cleaning part 22 sweeps the same position during reciprocating motion, so that the angle of the magnetic rod 21 is displaced every time the cleaning part 22 moves transversely to the same position when the transmission ratio is set, so that the cleaning part 22 can slowly sweep the whole circle of the magnetic rod 21.

In this embodiment, the magnetic rod 21 is used for adsorbing iron filings and magnetic particles on the pole piece 100, so as to ensure the production quality of the pole piece 100. The two ends of the magnetic bar 21 are provided with the non-magnetic sections 211, so that when the cleaning part 22 moves to the non-magnetic sections 211 at the two ends, iron chips and magnetic objects on the cleaning part fall off due to no magnetic force and self gravity, and the iron chips and the magnetic objects can be cleaned in time.

As shown in fig. 3 and 4, the cleaning part 22 is an arc-shaped block, and is disposed on a side of the magnetic bar 21 away from the pole piece 100. Above-mentioned setting makes bar magnet 21 towards pole piece 100 one side can normally adsorb the cleanness while realizing cleaning bar magnet 21 to pole piece 100, need not to shut down, improves pole piece 100 production efficiency. Specifically, be equipped with semi-circular socket on the arc piece, the arc piece is kept away from the periphery of pole piece 100 one side to bar magnet 21 through semi-circular socket joint, through the rotation of bar magnet 21 self to rotate bar magnet 21 to cleaning portion 22 towards one side of pole piece 100, cleaning portion 22 can clean iron fillings and magnetic particle on it, realizes the automatic cleanness to bar magnet 21. Further, the cross-sectional area of the end of the cleaning part 22 in contact with the magnetic rod 21 is tapered to increase the cleaning area of the cleaning part 22 for the magnetic rod 21, thereby further improving the cleaning efficiency.

The material of the cleaning part 22 is selected such that the cleaning part 22 has a low friction coefficient, and the friction between the cleaning part 22 and the magnetic rod 21 is reduced. Further, the one side that cleaning portion 22 and bar magnet 21 butt is equipped with a plurality of arc strip bellying 221 to arc strip bellying 221 suits with the arc surface of bar magnet 21, and with this, when cleaning portion 22 moved along bar magnet 21, a plurality of arc strip bellying 221 can play the purpose of cleaning many times to the same position of bar magnet 21, has further strengthened the cleaning effect. In this embodiment, the plurality of arc-shaped strip-shaped protrusions 221 form a wave shape on the surface of the cleaning part 22.

Accordingly, the screw 12 is also disposed on the side of the cleaning part 22 away from the pole piece 100, so as to reduce the interference to the operation of the magnetic bar 21.

As shown in fig. 1, 3, and 4, as a preferable configuration of the cleaning device of the present embodiment, the cleaning mechanism 2 further includes a dust collection cover 23, the dust collection cover 23 covers an outer periphery of the cleaning portion 22, a cleaning gap 233 is formed between the cleaning portion 22 and the dust collection cover 23 along a moving direction of the cleaning portion 22 (a direction indicated by an arrow in fig. 1 or 4), and a clearance gap 232 is provided between the dust collection cover 23 and a surface of the magnetic rod 21. Above-mentioned setting, the clearance 232 of dodging that forms has avoided dust cage 23 to the interference of cleaning portion 22, and dust cage 23 can in time accomodate the iron fillings and the magnetic particle that cleaning portion 22 swept away in dust cage 23 through cleaning clearance 233, and when cleaning portion 22 moved to no magnetic section 211, iron fillings and magnetic particle dropped to realize storing, avoiding flying upward in dust cage 23. Specifically, a cleaning gap 233 is formed between the side wall of the cleaning portion 22 and the inner wall of the dust collection cover 23 in the moving direction of the cleaning portion 22. In this embodiment, the cleaning gap 233 is provided at each of both sides of the cleaning part 22 to timely store the iron pieces and magnetic particles cleaned by the reciprocating movement of the cleaning part 22 into the dust collection cover 23.

The dust collecting cover 23 is fixed to the sliding bracket 13, and the dust collecting cover 23 is supported and fixed by the sliding bracket 13. Specifically, the dust collection cover 23 is provided with an installation opening, and the sliding bracket 13 is fixed to the cleaning part 22 in the dust collection cover 23 by passing through the installation opening.

Furthermore, the bottom of the dust collection cover 23 is provided with a dust collection port 231, the dust collection port 231 is connected with a dust remover, and negative pressure can be formed in the dust collection cover 23 through suction of the dust remover, so that iron chips and magnetic particles in the dust collection cover 23 are adsorbed into the dust remover.

Regarding the shape of the dust collection cover 23, in the present embodiment, an arc-shaped groove is formed on one side of the dust collection cover 23 facing the magnetic rod 21 to facilitate the installation of the cleaning part 22, and the bottom of the dust collection cover 23 is formed into an inverted cone to facilitate the collection of the iron filings and magnetic particles.

To facilitate understanding of the cleaning device of the present embodiment, the operation of the cleaning device will be described as follows:

the driving motor 11 drives the screw rod 12 to rotate, drives the sliding support 13 and the cleaning part 22 and the dust collection cover 23 on the sliding support 13 to move along the axial direction of the magnetic rod 21, simultaneously the transmission assembly 14 drives the magnetic rod 21 to rotate, and the magnetic rod 21 rotates to the side of the cleaning part 22 towards one side of the pole piece 100; the iron chips and the magnetic particles on the cleaning part 22 contact with the cleaning part 22 through the avoiding gap 232 and are cleaned through the cleaning part 22; in the process that the cleaning part 22 moves along the magnetic bar 21, the iron filings and the magnetic particles are cleaned and stored in the cleaning gap 233 in the dust collection cover 23, and when the cleaning part 22 moves to the non-magnetic section 211 at the end part of the magnetic bar 21, the iron filings and the magnetic particles lose the suction force and fall into the dust collection cover 23 for storage; finally, the dust remover is started to adsorb the iron chips and the magnetic particles in the dust collection cover 23 into the dust remover; by changing the rotation direction of the driving motor 11, the cleaning part 22 can reciprocate along the axial direction of the magnetic rod 21, thereby realizing the reciprocating cleaning of the magnetic rod 21 and improving the cleaning efficiency.

In the present embodiment, the movement of the cleaning portion 22 is realized by driving the motor 11 and the screw 12, but in other embodiments, the driving may be realized by providing the driving motor 11 and a timing belt or a transmission gear, and the present embodiment is not limited thereto. Accordingly, in other embodiments, the transmission assembly 14 may also adopt a transmission gear structure to perform transmission, or the magnetic rod 21 and the cleaning part 22 are driven by two driving motors 11, which is not limited to the solution in this embodiment.

In another embodiment, the driving motor 11 may be a unidirectional rotation motor, and the screw 12 may be a bidirectional screw, so that the cleaning unit 22 can reciprocate along the magnetic rod 21. The non-magnetic section 211 can be selectively disposed at one end of the magnetic rod 21, and is not limited to the solution of the embodiment.

The embodiment also discloses a pole piece production line, which comprises the cleaning device in the foregoing, realizes the cleaning of the pole piece 100, and can automatically clean the magnetic bar 21, so that the cleaning efficiency is high, and the cleaning effect is good.

In conclusion, we can see that the utility model has the advantages that:

(1) can clean pole piece 100 through bar magnet 21, can sweep away iron fillings and magnetic particle on the bar magnet 21 through clean portion again, realize that automatic cleaning, the efficient of bar magnet 21, bar magnet 21 can be followed self axis and rotated and enhanced cleaning dynamics and clean effect with the cleaning portion 22 of motion cooperatees simultaneously.

(2) The driving motor 11 drives the magnetic bar 21 and the cleaning part 22 to move synchronously, thereby not only enabling the magnetic bar 21 and the cleaning part 22 to move synchronously, but also simplifying the driving structure and reducing the volume of the device.

(3) The driving motor 11 is a forward and reverse rotation motor, so that the cleaning part 22 reciprocates, the magnetic rod 21 is cleaned in a reciprocating manner, and the cleaning efficiency is further improved.

(4) The cleaning part 22 is set to be an arc block and is arranged on one side of the magnetic rod 21 far away from the pole piece 100, so that the magnetic rod 21 can be cleaned while the magnetic rod 21 is normally adsorbed and cleaned on one side of the magnetic rod 21 facing the pole piece 100, and the production efficiency of the pole piece 100 is improved.

(5) Dust cage 23 neither disturbs cleaning portion 22, but can in time accomodate the iron fillings and the magnetic particle that cleaning portion 22 swept away in dust cage 23 through cleaning clearance 233, and when cleaning portion 22 moved to no magnetic section 211, iron fillings and magnetic particle dropped to realize storing, avoiding flying up in dust cage 23.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A cleaning device, comprising:

a drive mechanism (1);

clean mechanism (2), with actuating mechanism (1) transmission is connected, clean mechanism (2) include bar magnet (21) and cleaning portion (22), cleaning portion (22) at least part cup joint in the periphery of bar magnet (21), bar magnet (21) can rotate around self axis under actuating mechanism (1) drive, cleaning portion (22) can follow under the drive of actuating mechanism (1) the axis direction motion of bar magnet (21).

2. Cleaning device according to claim 1, characterized in that the drive mechanism (1) comprises:

a drive motor (11);

the screw rod (12) is in transmission connection with the driving motor (11);

and the sliding support (13) is in transmission connection with the lead screw (12), and the sliding support (13) is fixedly connected with the cleaning part (22).

3. The cleaning device according to claim 2, characterized in that the drive mechanism (1) further comprises a transmission assembly (14), and the magnetic rod (21) is in transmission connection with the drive motor (11) through the transmission assembly (14).

4. The cleaning device according to claim 3, wherein the transmission assembly (14) comprises a first transmission wheel (141), a transmission belt (142) and a second transmission wheel (143), the first transmission wheel (141) is fixed on the lead screw (12), the second transmission wheel (143) is fixed on the magnetic bar (21), and the transmission belt (142) is rotatably sleeved on the first transmission wheel (141) and the second transmission wheel (143).

5. The cleaning device according to claim 2, characterized in that the drive motor (11) is a counter-rotating motor or the lead screw (12) is a bidirectional lead screw.

6. The cleaning device according to claim 1, characterized in that the sweeping part (22) is an arc-shaped block which is arranged on the side of the magnetic bar (21) which is far away from the pole piece (100).

7. The cleaning device according to claim 6, wherein the cleaning mechanism (2) further comprises a dust collection cover (23), the dust collection cover (23) covers the periphery of the cleaning part (22), a cleaning gap (233) is formed between the cleaning part (22) and the dust collection cover (23) along the movement direction of the cleaning part (22), and an escape gap (232) is provided between the dust collection cover (23) and the surface of the magnetic rod (21).

8. The cleaning device as claimed in claim 6, characterized in that the surface of the sweeping part (22) abutting against the magnetic bar (21) is provided with a plurality of arc-shaped strip-shaped protrusions (221), and the arc-shaped strip-shaped protrusions (221) are matched with the arc-shaped surface of the magnetic bar (21).

9. The cleaning device according to claim 1, wherein at least one of the two ends of the magnetic bar (21) is provided with a non-magnetic section (211).

10. A pole piece manufacturing line comprising a cleaning device as claimed in any one of claims 1 to 9.