Coating roller and coating machine applying same

Abstract

The utility model discloses a coating roller and a coating machine using the same. The coating roller comprises a roller body used for coating and fixing mechanisms arranged at the head end and the tail end of the roller body. The fixing mechanism comprises an axial air floating piece arranged on the peripheral side of the roller body, an axial air floating material holder arranged outside the axial air floating piece and a fixing shell arranged outside the axial air floating material holder. A first through hole communicated with the fixed shell and the axial air floating piece is formed in the axial air floating material retainer; a first air chamber is defined by the fixed shell, the air flotation material retainer and the axial air flotation piece; after air enters the first air chamber, a layer of micron-level high-rigidity air film is formed on the two faces of the axial air floating piece, contact-free and radial supporting is formed on the roller body, and bearing abrasion is avoided; the jumping precision of the coating roller is less than 0.5 mu m, so that the consistency of the coated battery is improved; therefore, the pre-tightening force of the bearing does not need to be adjusted, the requirements for adjusting and controlling time and operators are low, the production cost can be saved, and the labor efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating machines, in particular to a coating roller and a coating machine using the same. Background Art

[0002] In the manufacturing process of lithium batteries, coating is an important process. The thickness of the coating will directly affect the battery capacity, battery safety, cycle life and battery consistency. If the coating thickness is inconsistent, it may lead to inconsistent performance of the battery during the charging and discharging process, thus affecting the battery life. Therefore, in recent years, the market has become more and more stringent and demanding on the consistency of battery coating thickness, and battery manufacturers have higher and higher requirements on the coating accuracy of coating equipment. A major factor affecting coating consistency is the circular runout of the coating roller. The smaller the runout, the more uniform the coating thickness and surface density, and the higher the battery consistency.

[0003] In the prior art, the rotating parts of the coating steel roller are all composed of precision angular contact ball bearings. The vibration of the roller surface circle is controlled by adjusting the preload of the angular ball contact bearing. The highest control level of this structural control method can reach 1μm, but it is close to the limit of mechanical precision control. At the same time, the debugging cycle of this structure is long and the skills of the operator are high. Excessive preload accelerates the wear of the bearings and shortens the life of the coating steel roller. What is more fatal is that the iron filings caused by the wear of the bearings are brought into the battery pole pieces, which will bring hidden dangers to the safety of the battery. Utility Model Content

[0004] In order to overcome the technical problems in the prior art, the present invention provides a coating roller and a coating machine using the same, which can improve the consistency of battery coating and does not require adjustment of bearing preload.

[0005] In order to solve the above technical problems, the first technical solution provided by the utility model is:

[0006] A coating roller comprises a roller body for coating, and a fixing mechanism arranged along the axial direction of the roller body and at both ends of the roller body;

[0007] The fixing mechanism includes an axial air floating member arranged on the outer peripheral side of the roller body, an axial air floating material retaining frame sleeved on the outer periphery of the axial air floating member and used to fix the position of the axial air floating member on the roller body, and a fixing shell sleeved on the outer peripheral side of the axial air floating material retaining frame;

[0008] The axial air-floating material retainer is provided with a plurality of first through holes communicating with the fixed shell and the axial air-floating member;

[0009] The fixed shell, the air-floating material holder and the axial air-floating member enclose a first air chamber, the fixed shell is provided with a first air inlet connected to the first air chamber, and the first through hole is connected to the first air chamber.

[0010] The coating roller as described above, wherein the fixing mechanism comprises a fixed end assembly provided at one end of the roller body and a floating end assembly provided at the other end of the roller body;

[0011] The axial air floating member comprises a fixed end axial air floating member provided on the fixed end assembly and a floating end axial air floating member provided on the floating end assembly;

[0012] The axial air-floating material retainer comprises a fixed-end axial air-floating material retainer provided on the fixed-end assembly and a floating-end axial air-floating material retainer provided on the floating-end assembly;

[0013] The fixed shell includes a fixed end fixed shell provided on the fixed end assembly and a floating end fixed shell provided on the floating end assembly;

[0014] The fixed end assembly comprises a fixed end axial air floating part arranged on the outer peripheral side of the roller body, the fixed end axial air floating material retaining frame arranged on the outer peripheral side of the fixed end axial air floating part, and a fixed end fixed shell arranged on the outer peripheral side of the fixed end axial air floating material retaining frame; the fixed end axial air floating part is provided with a folded end at one end away from the floating end assembly, and a precision disc is provided on the side of the folded end facing away from the fixed end axial air floating material retaining frame; a radial air floating part is provided along the radial direction of the roller body on the side of the precision disc facing away from the fixed end axial air floating part, and a radial air floating material retaining frame which can be used to fix the position of the radial air floating part on the roller body is provided on the side of the radial air floating part facing away from the precision disc;

[0015] The floating end assembly includes the floating end axial air floating part arranged on the outer peripheral side of the roller body, the floating end axial air floating material retaining frame arranged on the outer peripheral side of the floating end axial air floating part, and a floating end fixed shell arranged on the outer peripheral side of the floating end axial air floating material retaining frame.

[0016] As for the coating roller as described above, the fixed end fixed shell is further provided with a second air inlet; the radial air floating material retaining frame is provided with a plurality of second through holes, and the second through holes communicate the second air inlet with the radial air floating member.

[0017] In the coating roller as described above, the axial air flotation component and the radial air flotation component are air flotation components made of air flotation materials and having a porous structure.

[0018] As for the coating roller as described above, the radial air floating material retaining frame and the fixed end fixed shell enclose a second air chamber; and the second air inlet is communicated with the second air chamber.

[0019] As for the coating roller as described above, a first sealing ring is provided between the radial air-floating material retaining frame and the fixed end fixed shell; and a second sealing ring is provided between the axial air-floating material retaining frame and the fixed shell.

[0020] The coating roller as described above is characterized in that one end of the fixed end assembly is connected to a coating roller driving member.

[0021] As described above for the coating roller, the first air chamber is an annular air chamber centered around the central axis of the roller body.

[0022] In order to solve the above technical problems, the second technical solution provided by the utility model is:

[0023] A coating machine uses the coating roller.

[0024] The coating machine as described above comprises a support seat for carrying the coating roller, the fixing mechanism is mounted on the support seat, and an adjusting member for adjusting the balance of the coating roller is arranged between the fixing mechanism and the support seat.

[0025] The beneficial effects of the utility model are:

[0026] Gas is supplied into the first air chamber along the air inlet. After entering the first air chamber, the gas forms a μm-level high-rigidity air film on both sides of the axial air float, forming contact-free and radial support for the roller body, thereby avoiding bearing wear; the running accuracy of the coating roller is made less than 0.5μm, thereby improving the consistency of the coated battery; compared with the prior art, this solution does not require adjustment of the bearing preload, has low requirements on adjustment time and operators, can save production costs, and improve labor efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 is a three-dimensional diagram of the coating roller in this embodiment;

[0029] Figure 2 yes Figure 1 Sectional view of the AA plane;

[0030] Figure 3 yes Figure 1 Sectional view of the middle BB plane;

[0031] Figure 4 is a structural disassembly diagram of the fixed end assembly in this embodiment;

[0032] Figure 5 is a structural exploded diagram of the floating end assembly in this embodiment;

[0033] Figure 6 is a three-dimensional diagram of the coating machine in this embodiment;

[0034] Figure 7 is a three-dimensional diagram of the coating machine in this embodiment with the coating die head omitted;

[0035] Figure 8 yes Figure 7 A partial enlarged view of B in the middle;

[0036] Fig. 9 is a structural breakdown diagram of the adjusting member in this embodiment;

[0037] The numbers in the accompanying drawings are: 1 coating roller, 11 roller body, 12 fixing mechanism, 12-1 fixed end assembly, 12-2 floating end assembly, 121 air floating component, 1211 axial air floating component, 1211-1 fixed end axial air floating component, 1211-1 folding end, 1211-2 floating end axial air floating component, 1212 radial air floating component, 122 precision disc, 123 fixed shell, 123-1 fixed end fixed shell, 123-2 floating end fixed shell, 1241 first air chamber, 1242 second air chamber, 1231 first air inlet, 1232 The second air inlet, 125 radial air floating material holder, 126 spacer, 1251 second through hole, 127 axial air floating material holder, 127-1 fixed end axial air floating material holder, 127-2 floating end axial air floating material holder, 1271 first through hole, 128 first sealing ring, 129 second sealing ring, 13 coating roller drive, 2 support seat, 3 coating die, 5 adjustment member, 51 coating roller fixed seat, 60 roller, 61 active roller, 62 roller drive, 71 sliding seat, 72 slide rail, 73 coating die drive. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0039] like Figure 1-2 As shown, a coating roller comprises a roller body 11 for coating, and a fixing mechanism 12 arranged at both ends of the roller body 11 along the axial direction of the roller body 11;

[0040] The fixing mechanism 12 includes an axial air floating member 1211 disposed on the outer peripheral side of the roller body 11, an axial air floating material holder 127 sleeved on the outer periphery of the axial air floating member 1211 and used to fix the position of the axial air floating member 1211 on the roller body 11, and a fixing shell 123 sleeved on the outer peripheral side of the axial air floating material holder 127;

[0041] The axial air-floating material holder 127 is provided with a plurality of first through holes 1271 communicating with the fixed shell 123 and the axial air-floating member 1211;

[0042] The fixed shell 123 , the air-floating material holder 127 and the axial air-floating member 1211 enclose a first air chamber 1241 . The fixed shell 123 is provided with a first air inlet 1231 communicating with the first air chamber 1241 . The first through hole 1271 is communicated with the first air chamber 1241 .

[0043] When in use, high-pressure gas enters the first through hole 1271 of the first air chamber 1241 through the first air inlet 1231 and is discharged from the inner material surface of the axial air floating member 1211. At the same time, a layer of high-rigidity uniform air film of μm level is formed between the axial air floating member 1211 and the roller body 11. The supporting force of the air film can bear the weight of the roller body 11 and completely isolate the roller body 11 from other parts. This not only avoids bearing wear, but also forms non-contact radial support between the roller body and the parts. At the same time, due to the effect of error averaging, the beating accuracy of the coating roller in this embodiment is one order of magnitude higher than that of the steel roller in the prior art, so that the beating accuracy of the coating roller is ≤0.5μm, thereby improving the consistency of the coated battery.

[0044] Compared with the prior art, the coating roller 1 in this embodiment does not need to adjust the preload force of the bearing. The method of adjusting the runout accuracy is based on the pressure of the gas supplied into the first air chamber 1241. It has low requirements for the control operator, greatly reduces the debugging time, can save production costs and improve labor efficiency.

[0045] Specifically, the first through hole 1271 is an elongated through hole arranged along the axial direction of the roller body 11 .

[0046] like Figure 2 , Figure 3 As shown, specifically, the fixing mechanism 12 includes a fixed end component 12 - 1 provided at one end of the roller body 11 and a floating end component 12 - 2 provided at the other end of the roller body 11;

[0047] The fixed end axial air floating member 1211 includes a fixed end axial air floating member 1211-1 provided on the fixed end assembly 12-1 and a floating end axial air floating member 1211-2 provided on the floating end assembly 12-2;

[0048] The axial air-floating material retainer 127 includes a fixed end axial air-floating material retainer 127-1 provided on the fixed end assembly 12-1 and a floating end axial air-floating material retainer 127-2 provided on the floating end assembly 12-2;

[0049] The fixed shell 123 includes a fixed end fixed shell 123-1 provided on the fixed end assembly 12-1 and a floating end fixed shell 123-2 provided on the floating end assembly 12-2;

[0050] like Figure 2 As shown, the fixed end assembly 12-1 includes a fixed end axial air floating member 1211-1 arranged on the outer peripheral side of the roller body 11, the fixed end axial air floating material retaining frame 127-1 arranged on the outer peripheral side of the fixed end axial air floating member 1211-1, and a fixed end fixed shell 123-1 arranged on the outer peripheral side of the fixed end axial air floating material retaining frame 127-1; the fixed end axial air floating member 1211-1 is folded toward the fixed end fixed shell 123-1 at one end away from the floating end assembly 12-2. The folded end 1211-11 is provided with a precision disc 122 on the side of the folded end 1211-11 facing away from the fixed end axial air floating material holder 127-1; the precision disc 122 is provided with a radial air floating member 1212 arranged along the radial direction of the roller body 11 on the side facing away from the fixed end axial air floating member 1211-1, and the radial air floating member 1212 is provided with a radial air floating material holder 125 for fixing the radial air floating member 1212 on the roller body 11 on the side facing away from the precision disc 122. ；

[0051] like Figure 3 As shown, the floating end assembly 12-2 includes the floating end axial air floating member 1211-2 arranged on the outer peripheral side of the roller body 11, the floating end axial air floating material retaining frame 127-2 arranged on the outer peripheral side of the floating end axial air floating member 1211-2, and the floating end fixed shell 123-2 arranged on the outer peripheral side of the floating end axial air floating material retaining frame 127-2.

[0052] In this embodiment, the difference between the fixed end axial air flotation member 1211-1 and the floating end axial air flotation member 1211-2 is that the fixed end axial air flotation member 1211-1 can provide support to the roller body 11 along the axial and radial directions of the roller body 11, while the floating end axial air flotation member 1211-2 can only provide support to the roller body 11 along the axial direction.

[0053] like Figure 2 , Figure 4 as well as Figure 5 As shown, the provision of the radial air floating member 1212 can further reduce the metal friction between the parts, and perform non-contact axial positioning on the roller body 11 and various parts without affecting the rotation of the roller body 11.

[0054] Furthermore, the precision disc 122 is detachably mounted on the coating roller 1 , so as to provide a parallel and smooth high-precision plane and to axially fix the roller body 11 .

[0055] More specifically, in order to facilitate the disassembly, transportation and maintenance of the coating roller, the precision disc 122 is connected to the roller body 11 by bolts.

[0056] Specifically, there are a plurality of first air inlets 1231 . Similarly, the number of the first air inlets 1231 is determined according to the volume of the air chamber 124 and the air supply speed.

[0057] like Figure 2 As shown, further, the fixed end fixed shell 123-1 is provided with a second air inlet 1232; the radial air floating material holder 125 is provided with a plurality of second through holes 1251, and the second through holes 1251 communicate with the second air inlet 1232 and the radial air floating member 1212;

[0058] Specifically, the radial air floating material retaining frame 125 and the fixed end fixed shell 123 - 1 are enclosed to form a second air chamber 1242 ; the second air inlet 1232 is in communication with the second air chamber 1242 .

[0059] When in use, high-pressure air is introduced into the second air inlet 1232, and after entering the second air chamber 1242, the high-pressure air enters the radial air float 1212 and is then discharged, thereby strengthening the contactless axial fixation of the roller body 11 while performing non-contact axial positioning of the roller body 11 and various components; high-pressure air is introduced into the first air chamber 1241, and after entering the first through hole 1271, the high-pressure air is then discharged, thereby strengthening the contactless radial support and fixation of the roller body 11.

[0060] A first sealing ring 128 is provided between the radial air-floating material retaining frame 125 and the fixed end fixed shell 123-1; a second sealing ring 129 is provided between the axial air-floating material retaining frame 127 and the fixed shell 123; the first sealing ring 128 can prevent the gas from entering the second air chamber 1242 from the first air inlet 1231 and then leaking from the gap between the radial air-floating material retaining frame 125 and the fixed end fixed shell 123-1; the second sealing ring 129 can prevent the gas from entering the first air chamber 1241 from the first air inlet 1231 and then leaking from the gap between the axial air-floating material retaining frame 127 and the fixed shell 123, thereby avoiding gas leakage and causing changes in the air pressure in the first air chamber 1241 and the second air chamber 1242, causing the roller surface circle of the roller body 11 to jump, affecting the consistency of the coated finished battery.

[0061] Furthermore, the axial air flotation member 1211 and the radial air flotation member 1212 are air flotation members made of air flotation materials and having a porous structure, such as porous graphite, porous metal or any material having similar functions, as long as the material can form a uniform air film on the surface after the gas passes through its porous structure surface.

[0062] like Figure 1 As shown, further, the roller body 11 is connected to a coating roller driving member 13 at any end along its axial direction. Specifically, the coating roller driving member 13 is directly connected to the roller body 11, and the coating roller driving member 13 is used to provide a stable and precise rotation torque to the coating roller body 11.

[0063] like Figure 2 As shown, specifically, a spacer ring 126 is provided between the fixed shell 123 and the coating roller driving member 13; the gap size between the coating roller driving member 13 and the fixed shell 123 can be adjusted by replacing the spacer rings 126 of different thicknesses, avoiding control by preload force, which is simple, efficient and accurate.

[0064] like Figure 5-7 As shown, a coating machine is used, which is applied as the coating roller 1 mentioned above. Due to the existence of the air film of the coating roller 1, there is no friction between the metal parts in the coating roller 1. The application of the coating machine can improve the safety factor of the coated battery.

[0065] like Figure 4 As shown, the coating machine includes a support seat 2 for supporting the coating roller 1, on which the fixing mechanism 12 and a coating die head 3 radially arranged on the roller body 11 are installed. The coating die head 3 moves radially back and forth relative to the roller body 11 to feed material toward the roller body 11.

[0066] Specifically, a die propulsion device is provided between the coating die 3 and the support seat 2 , and the die propulsion device is used to move the coating die 3 relative to the support seat 2 .

[0067] like Figure 7 As shown, more specifically, the die propulsion device includes a sliding seat 71, a slide rail 72 and a coating die driving component 73; the coating die 3 is arranged on the sliding seat 71, and the support seat 2 is provided with a slide rail 72 and a coating die driving component 73, and the output end of the coating die driving component 73 is connected to the sliding seat 71.

[0068] More specifically, the coating die driving member 73 in this embodiment is a cylinder.

[0069] When it is necessary to feed material toward the roller body 11, the output end of the die drive 73 extends toward the roller body 11, drives the sliding seat 71 to move along the slide rail 72, and starts the coating die 3 to feed material toward the roller body 11; after the feeding is completed, the die drive 73 drives the sliding seat 71 to reset.

[0070] Specifically, an adjusting member 5 for adjusting the balance of the coating roller 1 is provided between the fixing mechanism 12 and the supporting seat 2 .

[0071] like Figure 8 As shown, more specifically, the adjusting member 5 includes a coating roller fixing seat 51, one end of the coating roller fixing seat 51 is connected to the fixing mechanism 12, and the other end is connected to the support seat 2; the coating roller fixing seat 51 is connected to the support seat 2 through a ball stud, so that when the coating roller 1 is installed on the support seat 2, the horizontal precision adjustment of the coating roller 1 installation plane is performed through the ball stud, which reduces the processing difficulty of the coating machine and improves the installation accuracy of the coating roller 1.

[0072] More specifically, the coating roller 1 is detachably mounted on the coating roller fixing seat 51 to facilitate installation, transportation and disassembly. More specifically, the coating roller 1 is connected to the coating roller fixing seat 51 by bolts.

[0073] Specifically, a passing roller 60 and an active passing roller 61 are also provided on the support seat 2; the passing roller 60 is arranged parallel to one side of the coating roller 1; the active passing roller 61 is arranged parallel to one side of the passing roller 60, and the active passing roller 61 is arranged on the side away from the coating roller 1; the active passing roller 61 is provided with a passing roller driving member 62 at either end along its axial direction.

[0074] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A coating roller, characterized in that: It comprises a roller body (11) for coating, and a fixing mechanism (12) arranged at both ends of the roller body (11) along the axial direction of the roller body (11); The fixing mechanism (12) comprises an axial air floating member (1211) arranged on the outer peripheral side of the roller body (11), an axial air floating material retaining frame (127) sleeved on the outer periphery of the axial air floating member (1211) and used to fix the position of the axial air floating member (1211) on the roller body (11), and a fixing shell (123) sleeved on the outer peripheral side of the axial air floating material retaining frame (127); The axial air-floating material retaining frame (127) is provided with a plurality of first through holes (1271) communicating with the fixed shell (123) and the axial air-floating member (1211); The fixed shell (123), the air-floating material retaining frame (127) and the axial air-floating member (1211) enclose a first air chamber (1241); the fixed shell (123) is provided with a first air inlet (1231) connected to the first air chamber (1241); and the first through hole (1271) is connected to the first air chamber (1241).

2. The coating roller according to claim 1, characterized in that: The fixing mechanism (12) comprises a fixed end component (12-1) provided at one end of the roller body (11) and a floating end component (12-2) provided at the other end of the roller body (11); The axial air floating member (1211) comprises a fixed end axial air floating member (1211-1) provided on the fixed end assembly (12-1) and a floating end axial air floating member (1211-2) provided on the floating end assembly (12-2); The axial air-floating material retainer (127) comprises a fixed-end axial air-floating material retainer (127-1) provided on the fixed-end component (12-1) and a floating-end axial air-floating material retainer (127-2) provided on the floating-end component (12-2); The fixed shell (123) comprises a fixed end fixed shell (123-1) provided on the fixed end assembly (12-1) and a floating end fixed shell (123-2) provided on the floating end assembly (12-2); The fixed end assembly (12-1) comprises the fixed end axial air floating member (1211-1) arranged on the outer peripheral side of the roller body (11), the fixed end axial air floating material retaining frame (127-1) arranged on the outer peripheral side of the fixed end axial air floating member (1211-1), and the fixed end fixed shell (123-1) arranged on the outer peripheral side of the fixed end axial air floating material retaining frame (127-1); the fixed end axial air floating member (1211-1) is provided with a folded end (123-1) at one end away from the floating end assembly (12-2) and folded toward the fixed end fixed shell (123-1). 1211-11), a precision disc (122) is provided on the side of the folded end (1211-11) facing away from the fixed end axial air floating material retaining frame (127-1); a radial air floating member (1212) is provided on the side of the precision disc (122) facing away from the fixed end axial air floating member (1211-1) along the radial direction of the roller body (11); a radial air floating member (1212) is provided on the side of the radial air floating member (1212) facing away from the precision disc (122) for fixing the radial air floating member (1212) on the roller body (11). The floating end assembly (12-2) comprises the floating end axial air floating part (1211-2) arranged on the outer peripheral side of the roller body (11), the floating end axial air floating material retaining frame (127-2) arranged on the outer peripheral side of the floating end axial air floating part (1211-2), and the floating end fixed shell (123-2) arranged on the outer peripheral side of the floating end axial air floating material retaining frame (127-2).

3. The coating roller according to claim 2, characterized in that: The fixed end fixed shell (123-1) is also provided with a second air inlet (1232); the radial air floating material retaining frame (125) is provided with a plurality of second through holes (1251), and the second through holes (1251) are connected between the second air inlet (1232) and the radial air floating component (1212).

4. The coating roller according to claim 2, characterized in that: The axial air flotation component (1211) and the radial air flotation component (1212) are air flotation components made of air flotation materials and having a porous structure.

5. The coating roller according to claim 3, characterized in that: The radial air-floating material retaining frame (125) and the fixed end fixed shell (123-1) enclose a second air chamber (1242); the second air inlet (1232) is in communication with the second air chamber (1242).

6. The coating roller according to claim 2, characterized in that: A first sealing ring (128) is provided between the radial air-floating material retaining frame (125) and the fixed end fixed shell (123-1); and a second sealing ring (129) is provided between the axial air-floating material retaining frame (127) and the fixed shell (123).

7. The coating roller according to claim 2, characterized in that: One end of the fixed end assembly (12-1) is connected to a coating roller driving component (13).

8. The coating roller according to claim 1, characterized in that: The first air chamber (1241) is an annular air chamber centered around the central axis of the roller body (11).

9. A coating machine, characterized in that: The application is a coating roller (1) as described in any one of claims 1 to 8.

10. The coating machine according to claim 9, characterized in that: It comprises a support seat (2) for carrying the coating roller (1), the fixing mechanism (12) being mounted on the support seat (2), and an adjusting member (5) for adjusting the balance of the coating roller (1) being provided between the fixing mechanism (12) and the support seat (2).

Images