A coating roller constant temperature heating device for coating machine

Abstract

The invention discloses a constant temperature heating device for a coating roller of a coating machine, which belongs to the technical field of coating machine equipment, and comprises: a roller body; a roller shaft, which is coaxially connected in the roller body; a sealing disk, which is symmetrically sleeved and fixed at both ends of the roller shaft, and bearings are installed on one side of the two sealing disks on the roller shaft; a fixed terminal, which is fixed at the two ends of the roller body and located on the other side of the bearing; a transmission tooth, which is sleeved on one of the fixed terminals; a liquid storage cavity, the center of which is opened in the roller shaft, and heat transfer oil flows and distributes in the liquid storage cavity; a heating device, which is installed in the liquid storage cavity, and the heating device heats the heat transfer oil by electric heating; a plurality of liquid conduction units, which are arranged and distributed, and each of the liquid conduction units is evenly distributed in the roller body and located outside the roller shaft; the invention can circulate and diffuse the heated heat transfer oil in the roller body through the liquid conduction unit, thereby improving the heating uniformity.

Description

Technical Field

[0001] The invention belongs to the technical field of coating machine equipment, in particular to a coating roller constant temperature heating device for a coating machine. Background Art

[0002] Coating machines are widely used in the production process of lithium-ion batteries. Coating is to evenly apply the positive electrode slurry or negative electrode slurry required for the manufacture of lithium-ion batteries to the substrate. In traditional coating machines, the coating rollers are mostly heated by resistance, that is, a resistance wire or resistance belt is installed inside the coating roller, and the heat generated by the current directly heats the coating roller. This heating method is simple, low-cost and easy to control. However, when using a coating roller that uses resistance heating, it is affected by the distribution of the resistance wire, and it is very easy to have a temperature difference between the two ends and the middle, which will cause heat concentration in local areas, while other areas are relatively low, resulting in uneven coating thickness, affecting the coating production quality;

[0003] Therefore, it is necessary to provide a constant temperature heating device for a coating roller of a coating machine to solve the problems raised in the above background technology. Summary of the invention

[0004] To achieve the above object, the present invention provides the following technical solution: a constant temperature heating device for a coating roller of a coating machine, comprising:

[0005] Roller body;

[0006] A roller shaft, coaxially connected in the roller body;

[0007] The isolation disks are symmetrically sleeved and fixed on both ends of the roller shaft, and the outer wall of each isolation disk is in sealing contact with the inner wall of the roller body. The roller shaft is provided with bearings on one side of the two isolation disks, and the roller body is rotatably connected to the roller shaft through the bearings.

[0008] A fixed terminal, fixed at two ends of the roller body and located on the other side of the bearing;

[0009] A transmission tooth is sleeved on one of the fixed terminals, and the motor drive unit is meshed with the transmission tooth through gear meshing.

[0010] A liquid storage cavity, the center of which is opened in the roller shaft, and heat transfer oil flows and distributes in the liquid storage cavity;

[0011] A heating device is installed in the liquid storage chamber, and the heating device heats the heat transfer oil by electric heating;

[0012] There are several liquid conducting units arranged and distributed, each of which is evenly distributed in the roller body and located outside the roller axis. The liquid conducting units circulate the heat transfer oil heated by the heating device internally so that the heat transfer oil flows evenly in the roller body.

[0013] Preferably, the heating device comprises:

[0014] a bobbin coaxially connected in the liquid storage chamber;

[0015] An electric heater, the center of which is installed in the barrel, a mounting groove is provided in one end of the roller shaft located in the liquid storage cavity, and the end of the electric heater is sealed and installed in the mounting groove;

[0016] An inner cavity, the center of which is arranged at one side of the end of the roller shaft close to the mounting groove, and a liquid injection hole is arranged on the side wall of the inner cavity;

[0017] A fixed channel is arranged in the roller shaft and is connected with the inner cavity, and the other end of the fixed channel is connected with the liquid storage cavity.

[0018] Preferably, the liquid guiding unit comprises:

[0019] A shaft disc, sleeved on the roller shaft, wherein an annular cavity is arranged in the shaft disc;

[0020] The liquid inlet channel is circumferentially opened on the side wall of the roller shaft, and the inner wall of the shaft disk close to the center of the circle is set as a hollow structure, so that the annular cavity is connected with the liquid storage cavity through each liquid inlet channel;

[0021] A liquid delivery pipe, vertically connected to the inner wall of the roller shaft, a plurality of the liquid delivery pipes are respectively connected to the liquid inlet channels, and the other end of the liquid delivery pipe is sealed and connected to the barrel in the heating device;

[0022] A liquid delivery channel, circumferentially distributed on the side wall of the roller;

[0023] The liquid holes are arranged evenly on the surface of the shaft disc.

[0024] Preferably, a plurality of flow holes are distributed on the barrel in the heating device, and the heat transfer oil flows out through the flow holes, enters the roller body through the circumferentially distributed liquid delivery channels, then flows back to the annular cavity through the liquid holes on the shaft disk, and finally flows into the barrel through the liquid inlet channel.

[0025] Preferably, a mounting ring is coaxially fixed on the roller shaft, and a positioning ring is coaxially fixed in the roller body, and vortex blades are distributed in the positioning ring;

[0026] The liquid delivery channel runs through the assembly ring, so that when the positioning ring rotates with the roller body, the heat transfer oil is guided to circulate through the vortex blades.

[0027] Preferably, an oil spray head is provided on the barrel of the heating device at each flow hole, and an oil spray hole is provided on the oil spray head.

[0028] Preferably, the oil spray head is rotatably and adjustably sealed and connected to the surface of the barrel in the heating device, and the oil spray hole is opened on the side of the oil spray head.

[0029] Preferably, the oil injection holes of the oil injection heads at the same linear position are oriented in the same direction and face one end of the roller shaft;

[0030] And the oil injection hole of the oil injection head at the adjacent side straight line position faces the other end of the roller shaft.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The roller body of the coating roller in the present invention can rotate relative to the roller shaft to perform normal coating operations, and a heating device is arranged in the roller shaft. The heating device adopts electric heating, has a significant heating effect, and is convenient for temperature control and adjustment; in particular, the liquid storage cavity in the roller body stores heat transfer oil, and the heated heat transfer oil can circulate and diffuse in the roller body through the liquid conduction unit, thereby improving the heating uniformity and avoiding the occurrence of local heat concentration, thereby ensuring the quality of subsequent coating operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0034] Figure 2 It is a partial cross-sectional schematic diagram of the roller body in the present invention;

[0035] Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle;

[0036] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention;

[0037] Figure 5 It is a structural schematic diagram of the heating device in the present invention;

[0038] Figure 6 for Figure 5 A magnified schematic diagram of the structure at B in the middle;

[0039] Figure 7 It is a schematic diagram of the structure of the vortex blade in the present invention;

[0040] Figure 8 This is a schematic diagram of the flow distribution of the heat transfer oil sprayed through the oil spray head in the present invention;

[0041] In the figure: 1. roller body; 11. fixed terminal; 12. transmission gear; 13. sealing disc; 14. bearing; 2. roller shaft; 21. liquid storage chamber; 22. mounting groove; 23. inner cavity; 24. fixed channel; 3. heating device; 31. bobbin; 32. electric heater; 33. flow hole; 4. liquid guide unit; 41. shaft disc; 42. liquid inlet channel; 43. liquid delivery pipe; 44. liquid delivery channel; 45. liquid hole; 5. assembly ring; 51. positioning ring; 52. vortex blade; 6. oil injection head; 61. oil injection hole. DETAILED DESCRIPTION

[0042] See also Figure 1-Figure 8 In an embodiment of the present invention, a coating roller constant temperature heating device for a coating machine comprises:

[0043] Roller body 1;

[0044] Roller shaft 2, coaxially connected in roller body 1;

[0045] The sealing discs 13 are symmetrically sleeved and fixed on both ends of the roller shaft 2, and the outer wall of each sealing disc 13 is in sealing contact with the inner wall of the roller body 1. The roller shaft 2 is provided with bearings 14 on one side of the two sealing discs 13, and the roller body 1 is rotatably connected to the roller shaft 2 through the bearings 14;

[0046] A fixed terminal 11 is fixed to the two ends of the roller body 1 and is located on the other side of the bearing 14;

[0047] The transmission teeth 12 are sleeved on one of the fixed terminals 11, and the motor drive unit (not shown in the figure) is meshed with the transmission teeth 12 through gear meshing. During the coating operation, the motor drive unit can drive the roller body 1 to rotate through the transmission teeth 12, so that the roller body 1 performs normal coating operation;

[0048] The liquid storage chamber 21 is centrally opened in the roller 2, and heat transfer oil flows and distributes in the liquid storage chamber 21; the heat transfer oil can be synthetic hydrocarbons, which are usually refined from petroleum fractions and have good thermal stability and low cost.

[0049] A heating device 3 is installed in the liquid storage chamber 21, and the heating device 3 heats the heat transfer oil by electric heating;

[0050] There are several liquid conducting units 4 arranged and distributed, and each of the liquid conducting units 4 is evenly distributed in the roller body 1 and is located outside the roller shaft 2. The liquid conducting units 4 circulate the heat transfer oil heated by the heating device 3 internally so that the heat transfer oil flows evenly in the roller body 1, thereby achieving uniform heating of the roller body 1 and avoiding local heat accumulation on its surface.

[0051] In this embodiment, the heating device 3 includes:

[0052] The barrel 31 is coaxially connected in the liquid storage chamber 21;

[0053] The electric heater 32 is centrally mounted in the bobbin 31. A mounting groove 22 is provided at one end of the liquid storage chamber 21 in the roller shaft 2. The end of the electric heater 32 is sealed and mounted in the mounting groove 22. The mounting groove 22 can prevent the thermal oil from penetrating and avoid damaging the components of the electric heater 32.

[0054] The inner cavity 23 is centrally arranged at one side of the end of the roller shaft 2 close to the mounting groove 22, and a liquid injection hole is arranged on the side wall of the inner cavity 23;

[0055] A fixed channel 24 is provided in the roller shaft 2 and is connected to the inner cavity 23 . The other end of the fixed channel 24 is connected to the liquid storage cavity 21 , so that the heat transfer oil in the liquid storage cavity 21 can be periodically replaced through the fixed channel 24 .

[0056] As a preferred embodiment, the liquid guiding unit 4 includes:

[0057] A shaft disc 41 is sleeved on the roller shaft 2, and an annular cavity is provided in the shaft disc 41;

[0058] The liquid inlet channel 42 is circumferentially opened on the side wall of the roller shaft 2, and the inner wall of the shaft disc 41 close to the center of the circle is set as a hollow structure, so that the annular cavity is connected to the liquid storage cavity 21 through each liquid inlet channel 42;

[0059] A liquid delivery pipe 43 is vertically connected to the inner wall of the roller shaft 2, and a plurality of the liquid delivery pipes 43 are respectively connected to the liquid inlet channel 42, and the other end of the liquid delivery pipe 43 is sealed and connected to the barrel 31 in the heating device 3;

[0060] A liquid delivery channel 44, circumferentially distributed on the side wall of the roller shaft 2;

[0061] The liquid holes 45 are arranged equidistantly on the surface of the shaft disk 41; a flow space can be formed between two adjacent shaft disks 41 to facilitate the full flow of the heat transfer oil. Dividing the roller body 1 into multiple flow spaces at equal intervals can ensure that all parts of the roller body can be heated evenly, thereby improving the coating quality and reducing product defects caused by uneven temperature.

[0062] In this embodiment, a plurality of flow holes 33 are distributed on the barrel 31 in the heating device 3. The heat transfer oil flows out through the flow holes 33 and enters the roller body 1 through the circumferentially distributed liquid delivery channels 44, and then flows back to the annular cavity through the liquid holes 45 on the shaft disk 41, and finally flows into the barrel 31 through the liquid inlet channel 42.

[0063] In this embodiment, a mounting ring 5 is coaxially fixed on the roller shaft 2, and a positioning ring 51 is coaxially fixed inside the roller body 1, and vortex blades 52 are distributed in the positioning ring 51;

[0064] The liquid delivery channel 44 runs through the assembly ring 5, so that when the positioning ring 51 rotates with the roller body 1, the heat transfer oil is guided to circulate through the vortex blades 52. As the rotation speed of the roller body 1 increases, the flow rate of the heat transfer oil in the roller body 1 increases, and the heating is more significant. Therefore, it can be preheated quickly in the early stage of the coating operation, and the heating effect is significant.

[0065] In this embodiment, an oil spray head 6 is disposed at each flow hole 33 on the barrel 31 in the heating device 3 , and an oil spray hole 61 is disposed on the oil spray head 6 .

[0066] As a preferred embodiment, the oil spray head 6 is rotatably and adjustably sealed and connected to the surface of the barrel 31 in the heating device 3 , and the oil spray hole 61 is opened on the side of the oil spray head 6 .

[0067] In this embodiment, the oil injection holes 61 of the oil injection heads 6 at the same linear position maintain the same orientation and face one end of the roller shaft 2;

[0068] And the oil injection hole 61 of the oil injection head 6 at the adjacent side straight line position faces the other end of the roller 2, so that the heat transfer oil heated by the electric heater 32 can fully flow between the barrel 31 and the roller 2 when it is sprayed through the oil injection hole on the oil injection head 6, thereby avoiding the temperature difference of the heat transfer oil and further improving the heating uniformity.

[0069] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A constant temperature heating device for a coating roller of a coating machine, characterized in that: It includes: Roller body (1); A roller shaft (2) is coaxially connected to the roller body (1); The sealing disc (13) is symmetrically mounted and fixed on both ends of the roller shaft (2); A fixed terminal (11) fixed to the two ends of the roller body (1) and located on the other side of the bearing (14); The transmission gear (12) is sleeved on one of the fixed terminals (11); the liquid storage cavity (21) is centrally opened in the roller shaft (2), and heat transfer oil flows and distributes in the liquid storage cavity (21); A heating device (3) is installed in the liquid storage chamber (21), wherein the heating device (3) comprises a tube (31) coaxially connected in the liquid storage chamber (21); A plurality of liquid guiding units (4) are arranged and distributed, and each of the liquid guiding units (4) is evenly distributed in the roller body (1) and is located outside the roller shaft (2); The liquid guiding unit (4) comprises: A shaft disc (41) is sleeved on the roller shaft (2), and an annular cavity is provided in the shaft disc (41); The liquid inlet channel (42) is circumferentially opened on the side wall of the roller shaft (2), and the inner wall of the shaft disc (41) close to the center of the circle is set as a hollow structure; A liquid delivery pipe (43) vertically connected to the inner wall of the roller shaft (2), a plurality of the liquid delivery pipes (43) are respectively connected to the liquid inlet channel (42), and the other end of the liquid delivery pipe (43) is sealedly connected to the barrel (31) in the heating device (3); The liquid delivery channels (44) are circumferentially distributed on the side wall of the roller shaft (2); the liquid holes (45) are equidistantly arranged on the surface of the shaft disc (41); An assembly ring (5) is coaxially fixed on the roller shaft (2), and a positioning ring (51) is coaxially fixed inside the roller body (1), and vortex blades (52) are distributed in the positioning ring (51); A plurality of flow holes (33) are distributed on the barrel (31) in the heating device (3), and the heat transfer oil flows out through the flow holes (33), enters the roller body (1) through the circumferentially distributed liquid delivery channels (44), then flows back into the annular cavity through the liquid holes (45) on the shaft disc (41), and finally flows into the barrel (31) through the liquid inlet channel (42).

2. A constant temperature heating device for a coating roller of a coating machine according to claim 1, characterized in that: The heating device (3) further comprises: An electric heater (32) is centrally mounted in the barrel (31); a mounting groove (22) is provided at one end of the roller shaft (2) located in the liquid storage cavity (21); and an end of the electric heater (32) is sealed and mounted in the mounting groove (22); An inner cavity (23) is centrally arranged at one side of the end of the roller shaft (2) close to the mounting groove (22), and a liquid injection hole is arranged on a side wall of the inner cavity (23); A fixed channel (24) is provided in the roller shaft (2) and is connected to the inner cavity (23); the other end of the fixed channel (24) is connected to the liquid storage cavity (21).

3. A constant temperature heating device for a coating roller of a coating machine according to claim 1, characterized in that: The outer wall of each of the sealing discs (13) is in sealing contact with the inner wall of the roller body (1), and a bearing (14) is installed on one side of the two sealing discs (13) on the roller shaft (2), and the roller body (1) is rotatably connected to the roller shaft (2) via the bearing (14); The heating device (3) heats the heat transfer oil by electric heating; The liquid guiding unit (4) performs internal circulation and transmission of the heat transfer oil heated by the heating device (3), so that the heat transfer oil flows evenly in the roller body (1); The annular cavity is connected to the liquid storage cavity (21) via each of the liquid inlet channels (42).

4. A constant temperature heating device for a coating roller of a coating machine according to claim 3, characterized in that: The liquid delivery channel (44) runs through the assembly ring (5), so that when the positioning ring (51) rotates with the roller body (1), the vortex blades (52) guide the heat transfer oil to circulate.

5. A constant temperature heating device for a coating roller of a coating machine according to claim 1, characterized in that: An oil spray head (6) is provided on the barrel (31) in the heating device (3) at each flow hole (33), and an oil spray hole (61) is provided on the oil spray head (6).

6. A constant temperature heating device for a coating roller of a coating machine according to claim 5, characterized in that: The oil spray head (6) is rotatably and adjustably sealed to the surface of the barrel (31) in the heating device (3), and the oil spray hole (61) is opened on the side of the oil spray head (6).

7. A constant temperature heating device for a coating roller of a coating machine according to claim 6, characterized in that: The oil injection holes (61) of the oil injection heads (6) at the same linear position are oriented in the same direction and face one end of the roller shaft (2); and the oil injection holes (61) of the oil injection heads (6) at adjacent side linear positions face the other end of the roller shaft (2).

Images