Heating roller and rolling device

Abstract

A heating roller, comprising: a roller body (10); a plurality of heating members (20) that extend in the length direction of the roller body (10) and are evenly distributed in the roller body (10) in the circumferential direction of the roller body (10); and a heat pipe assembly formed as an annular frame structure and arranged in the roller body (10), wherein the plurality of heating members (20) are located on the inner circumference of the heat pipe assembly. By providing the heat pipe assembly inside the roller body (10), the temperature difference on the circumferential surface of the roller body (10) can be effectively reduced, improving the temperature uniformity on the surface of the roller body (10). The present application further relates to a rolling device.

Description

Heating rollers and rolling equipment

[0001] This disclosure claims priority to a Chinese patent application filed with the Patent Office of China on February 29, 2024, with application number 202420391308.2 and application name “Heating roller and rolling device,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of battery preparation equipment, and more particularly, to a heating roller and a rolling device. Background Art

[0003] Electric heating rollers are widely used in the production of lithium battery electrode materials. Certain production processes place high demands on surface temperature consistency (temperature uniformity) on these rollers. However, existing electric heating rollers typically heat the metal roller body by installing electric heating rods inside it. This method has low heat transfer efficiency, high power consumption, and poor temperature uniformity on the roller surface, with temperature fluctuations reaching ±5°C, significantly impacting the performance of the electrode material. Summary of the Invention

[0004] The present disclosure aims to alleviate or solve at least one of the above-mentioned problems to at least some extent.

[0005] In one aspect of the present disclosure, a heating roller is proposed, comprising: a roller body; a plurality of heating elements, wherein the plurality of heating elements extend along the length direction of the roller body and are uniformly distributed within the roller body along the circumference of the roller body; and a heat pipe assembly, wherein the heat pipe assembly is formed as an annular frame structure, the heat pipe assembly is disposed within the roller body, and the plurality of heating elements are located within the inner circumference of the heat pipe assembly.

[0006] Optionally, the heat pipe assembly and the roller body are brazed together.

[0007] Optionally, in the radial direction of the roller body, the minimum distance between the heating element and the circumferential surface of the roller body is smaller than the distance between the heating element and the axis of the roller body.

[0008] Optionally, the heat pipe assembly includes: a plurality of first heat pipe segments, which extend along the length direction of the roller body and are evenly distributed within the roller body along the circumference of the roller body, and a distribution density of the first heat pipe segments in the circumference of the roller body is less than a distribution density of the heating element; and at least one second heat pipe segment, which is formed as an annular body extending along the circumference of the roller body and connects the plurality of first heat pipe segments.

[0009] Optionally, the heat pipe assembly includes two second heat pipe segments, wherein one of the second heat pipe segments connects the first ends of multiple first heat pipe segments, and the other of the second heat pipe segments connects the second ends of multiple first heat pipe segments.

[0010] Optionally, a mounting groove is provided at the end of the roller body, the mounting groove is adapted to the second heat pipe section, and the second heat pipe section is provided in the mounting groove.

[0011] Optionally, the roller body is provided with a plurality of first mounting holes penetrating along the length direction thereof, the number of the first mounting holes corresponds to the number of the heating elements, and the heating elements fill the entire first mounting holes.

[0012] Optionally, the roller body is provided with a plurality of second mounting holes penetrating along its length direction, the number of the second mounting holes corresponds to the number of the first heat pipe sections, and the first heat pipe sections fill the entire second mounting holes.

[0013] Optionally, the heating roller further comprises: two end covers, which are arranged at both ends of the roller body and are used to fix the heating element.

[0014] Optionally, a plug-in portion is provided on a side of the end cover close to the roller body, and the plug-in portion is plugged into the mounting groove. The heating roller further comprises: a sealing member, which is sleeved on the plug-in portion and is used to fill the gap between the plug-in portion and the wall of the mounting groove.

[0015] Optionally, the heating roller further comprises: a plurality of temperature detecting members, which are evenly distributed in the roller body along the circumference of the roller body, and the temperature detecting members are used to detect the temperature of the roller body.

[0016] Optionally, the heating element is formed as an electric heating rod extending along the length direction of the roller body.

[0017] In another aspect of the present disclosure, the present disclosure provides a rolling device comprising the above-mentioned heating roller.

[0018] Therefore, the heating roller and rolling equipment proposed in the present disclosure, by arranging a heat pipe assembly inside the roller body, the heat pipe assembly has extremely high heat transfer efficiency, so that the heat pipe assembly can quickly transfer the heat generated by the multiple heating elements at the periphery of the roller body in the circumferential direction, thereby effectively reducing the temperature difference on the circumferential surface of the roller body and improving the temperature uniformity of the surface of the roller body; and the multiple heating elements can be independently temperature-controlled, which can further ensure the temperature uniformity of the surface of the roller body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] FIG. 1 shows a perspective view of a heating roller according to one embodiment of the present disclosure.

[0021] FIG. 2 shows a front view of a heating roller according to one embodiment of the present disclosure.

[0022] FIG. 3 shows a cross-sectional view taken along line AA in FIG. 2 .

[0023] FIG. 4 shows a right side view of a heating roller according to one embodiment of the present disclosure.

[0024] FIG. 5 shows a cross-sectional view taken along line BB in FIG. 3 .

[0025] FIG6 shows an enlarged schematic diagram of the structure at circle C in FIG5 .

[0026] Description of the reference numerals: heating roller 100; roller body 10; mounting groove 11; heating element 20; heat pipe assembly 30; first heat pipe section 31; second heat pipe section 32; end cover 40; plug-in portion 41; sealing element 50; temperature detecting element 60. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present disclosure more clearly understood, specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present disclosure. However, the present disclosure can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without violating the scope of the present disclosure. Therefore, the present disclosure is not limited to the specific embodiments disclosed below.

[0028] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and 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 therefore should not be understood as a limitation to the present disclosure.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0030] In this disclosure, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0031] In the present disclosure, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0033] The following first describes in detail the heating roller 100 according to an embodiment of the present disclosure with reference to the accompanying drawings.

[0034] As shown in FIG. 1 to FIG. 6 , a heating roller 100 according to an embodiment of the present disclosure includes a roller body 10 , a plurality of heating elements 20 , and a heat pipe assembly 30 .

[0035] Specifically, the heating element 20 extends along the length direction of the roller body 10, and multiple heating elements 20 are evenly distributed in the roller body 10 along the circumference of the roller body 10. The heat pipe assembly 30 is formed into an annular frame structure. The heat pipe assembly 30 is arranged in the roller body 10, and multiple heating elements 20 are located on the inner circumference of the heat pipe assembly 30.

[0036] In other words, as shown in Figures 1 to 6, the heating roller 100 according to an embodiment of the present disclosure primarily comprises a roller body 10, multiple heating elements 20, and a heat pipe assembly 30. The roller body 10 is a forging, hardened during processing to an HRC 62-64 hardness, with a quenching depth greater than 5 mm. The length of the roller body 10 is aligned with the length of the heating elements 20. There can be six heating elements 20, each disposed within the roller body 10 to heat the roller body 10 at different circumferential locations. Furthermore, the multiple heating elements 20 are evenly distributed around the roller body 10, effectively ensuring temperature uniformity on the circumferential surface (roller surface) of the roller body 10.

[0037] The heat pipe assembly 30 can be formed into a ring-shaped frame structure. The length of the heat pipe assembly 30 is aligned with the length of the roller body 10, and the radial dimension of the heat pipe assembly 30 is smaller than the radial dimension of the roller body 10. This allows the heat pipe assembly 30 to be located inside the roller body 10, and the multiple heating elements 20 are all located on the inner periphery of the heat pipe assembly 30. This allows the heat pipe assembly 30 to quickly transfer the heat generated by the multiple heating elements 20 around the circumference of the roller body 10 from the outer periphery, thereby effectively reducing the temperature difference on the circumferential surface of the roller body 10. Experiments have shown that the roller surface temperature difference of the heating roller 100 of the disclosed embodiment is ≤±0.5°C.

[0038] It should be noted that the "heat pipe" in the heat pipe assembly 30 is a heat transfer element that relies on the phase change of its internal working fluid to achieve heat transfer. It has extremely high heat transfer efficiency and is known as a thermal superconductor.

[0039] Therefore, according to the heating roller 100 provided in this embodiment, by arranging the heat pipe assembly 30 inside the roller body 10, the heat pipe assembly 30 has an extremely high heat transfer efficiency, so that the heat pipe assembly 30 can quickly transfer the heat generated by the multiple heating elements 20 at the periphery thereof in the circumferential direction of the roller body 10, thereby effectively reducing the temperature difference of the circumferential surface of the roller body 10 and improving the temperature uniformity of the surface of the roller body 10; and the multiple heating elements 20 can be independently temperature-controlled, which can further ensure the temperature uniformity of the surface of the roller body 10.

[0040] Furthermore, the heating element 20 is formed as an electric heating rod with a slender cylindrical structure extending along the length direction of the roller body 10, and the heating power of the electric heating rod can be 1500W.

[0041] In some examples of the present disclosure, the roller body is provided with a mounting channel penetrating along the axial direction thereof.

[0042] According to one embodiment of the present disclosure, the heat pipe assembly 30 and the roller body 10 are brazed together.

[0043] Specifically, the heat pipe assembly 30 and the roller body 10 are welded together by solder, thereby fixing the heat pipe assembly 30 on the roller body 10. The solder can also fill the gap between the heat pipe assembly 30 and the roller body 10, thereby effectively improving the heat transfer efficiency of the connection interface between the heat pipe assembly 30 and the roller body 10, thereby further improving the temperature uniformity of the surface of the roller body 10.

[0044] In some embodiments of the present disclosure, in the radial direction of the roller body 10 , the minimum distance between the heating element 20 and the circumferential surface of the roller body 10 is smaller than the distance between the heating element 20 and the axis of the roller body 10 .

[0045] That is to say, as shown in FIG3 , in the radial direction of the roller body 10 , the minimum distance between the heating element 20 and the circumferential surface of the roller body 10 is d1 , and the distance between the heating element 20 and the axis of the roller body 10 is d2 , where d1 < d2 , thereby ensuring that the heat generated by the heating element 20 can be transferred to the circumferential surface of the roller body 10 more quickly.

[0046] According to one embodiment of the present disclosure, the heat pipe assembly 30 includes: multiple first heat pipe segments 31 and at least one second heat pipe segment 32, the first heat pipe segments 31 extend along the length direction of the roller body 10, and the multiple first heat pipe segments 31 are evenly distributed in the roller body 10 along the circumference of the roller body 10, and in the circumference of the roller body 10, the distribution density of the first heat pipe segments 31 is less than the distribution density of the heating element 20, and the second heat pipe segment 32 is formed as an annular body extending along the circumference of the roller body 10, and the second heat pipe segment 32 connects the multiple first heat pipe segments 31.

[0047] In other words, as shown in Figures 3 and 6, the heat pipe assembly 30 according to the embodiment of the present disclosure mainly includes multiple first heat pipe segments 31 and at least one second heat pipe segment 32, wherein the first heat pipe segment 31 is formed into a columnar structure extending along the length direction (axial direction) of the roller body 10, so that the heat pipe assembly 30 can quickly transfer the heat emitted by the heating element 20 in the length direction of the roller body 10; one end of the multiple first heat pipe segments 31 is connected and conducted to the second heat pipe segment 32, so that the heat emitted by the heating element 20 can be quickly transferred in the circumferential direction of the roller body 10 through the second heat pipe segment 32, thereby effectively reducing the temperature difference on the circumferential surface of the roller body 10; and the multiple first heat pipe segments 31 are evenly distributed along the circumference of the roller body 10 inside the roller body 10, thereby further reducing the temperature difference on the circumferential surface of the roller body 10.

[0048] In some embodiments of the present disclosure, the heat pipe assembly 30 includes two second heat pipe segments 32 , wherein one second heat pipe segment 32 connects the first ends of multiple first heat pipe segments 31 , and the other second heat pipe segment 32 connects the second ends of multiple first heat pipe segments 31 .

[0049] That is, as shown in Figures 5 and 6, the heat pipe assembly 30 may include two second heat pipe segments 32, multiple first heat pipe segments 31 are located between the two second heat pipe segments 32, and the first ends of the multiple first heat pipe segments 31 are connected and conducted to one of the second heat pipe segments 32, and the second ends of the multiple first heat pipe segments 31 are connected and conducted to another second heat pipe segment 32, so that the two second heat pipe segments 32 can conduct heat at both ends of the multiple first heat pipe segments 31, which can further reduce the temperature difference on the circumferential surface of the roller body 10 and improve the temperature uniformity of the surface of the roller body 10.

[0050] According to one embodiment of the present disclosure, a mounting groove 11 is provided at the end of the roller body 10 . The mounting groove 11 is adapted to the second heat pipe section 32 , and the second heat pipe section 32 is provided in the mounting groove 11 .

[0051] Specifically, as shown in FIG6 , mounting grooves 11 are respectively provided at both ends of the roller body 10. The mounting grooves 11 extend along the circumference of the roller body 10 to form an annular groove adapted to the second heat pipe section 32, so that both second heat pipe sections 32 can be provided in the mounting grooves 11, thereby improving the utilization rate of heat and facilitating the assembly of the heat pipe assembly 30.

[0052] In some embodiments of the present disclosure, the roller body 10 is provided with a plurality of first mounting holes extending along its length, the number of the first mounting holes corresponds to the number of the heating elements 20, and the heating elements 20 fill the entire first mounting holes; and / or, the roller body 10 is provided with a plurality of second mounting holes extending along its length, the number of the second mounting holes corresponds to the number of the first heat pipe sections 31, and the first heat pipe sections 31 fill the entire second mounting holes.

[0053] In detail, a first mounting hole is provided at the end of the roller body 10, and the number of the first mounting holes is the same as the number of the heating elements 20. The first mounting holes are formed as a through-hole structure that passes through the length direction of the roller body 10. The length and radial dimensions of the heating element 20 are configured to be approximately the same as the length and radial dimensions of the first mounting hole, so that the heating element 20 can fill the entire first mounting hole. The structure is simple and easy to produce and assemble. Moreover, the heating element 20 can heat the roller body 10 at each position in the length direction, which can effectively ensure the temperature uniformity of the roller body 10 in its length direction.

[0054] Furthermore, a second mounting hole is provided at the end of the roller body 10, and the number of the second mounting holes is the same as the number of the first heat pipe sections 31. The second mounting holes are formed as a through-hole structure that penetrates along the length direction of the roller body 10. The length and radial dimensions of the first heat pipe section 31 are configured to be approximately the same as the length and radial dimensions of the first mounting hole, so that the first heat pipe section 31 can fill the entire first mounting hole, which has a simple structure and is convenient for production and assembly. Moreover, heat can be transferred at each position along the length direction of the roller body 10 through the first heat pipe section 31, which can effectively ensure the temperature uniformity of the roller body 10 along its length direction.

[0055] According to one embodiment of the present disclosure, the heating roller 100 further includes two end covers 40 , which are disposed at both ends of the roller body 10 and are used to fix the heating element 20 .

[0056] That is to say, as shown in Figures 1 and 2, the roller body 10 is provided with end covers 40 at both ends of its length direction (axial direction). The end covers 40 can be fixedly connected to the roller body 10 by screws, so that the heating element 20 can be fixed by the end covers 40 at both ends of the roller body 10. The structure is simple and convenient for production and assembly.

[0057] One of the end caps 40 is provided with a first through hole extending through the thickness thereof. The first through hole corresponds to the position of the heating element 20 , so that the wiring section of the heating element 20 can be exposed from the first through hole for connection with the control circuit.

[0058] In some embodiments of the present disclosure, a plug-in portion 41 is provided on one side of the end cover 40 close to the roller body 10, and the plug-in portion 41 is plugged into the mounting groove 11. The heating roller 100 also includes: a seal 50, which is sleeved on the plug-in portion 41 and is used to fill the gap between the plug-in portion 41 and the wall of the mounting groove 11.

[0059] Specifically, as shown in Figure 6 , the end cap 40 has a plug-in portion 41 extending along its thickness on one side near the roller body 10. This plug-in portion 41 is formed as a boss structure that matches the position and shape of the mounting groove 11. When the end cap 40 is connected to the roller body 10, the plug-in portion 41 plugs into the mounting groove 11, thereby sealing the open end of the mounting groove 11. If the solder connecting the heat pipe assembly 30 and the roller body 10 melts due to excessive temperature, the plug-in portion 41 can seal the solder within the mounting groove 11, effectively preventing loss of the solder.

[0060] Furthermore, the side wall of the plug-in part 41 is provided with an annular groove extending along its circumference, and the plug-in part 41 is provided with a sealing member 50 at the position of the annular groove. The sealing member 50 can be a high-temperature resistant rubber ring. The sealing member 50 can fill the gap between the plug-in part 41 and the wall of the installation groove 11, thereby achieving a sealing effect, and further preventing the loss of solder.

[0061] According to an embodiment of the present disclosure, the heating roller 100 further includes: a plurality of temperature detection members 60 , which are evenly distributed within the roller body 10 along the circumference of the roller body 10 , and are used to detect the temperature of the roller body 10 .

[0062] That is to say, as shown in Figures 1 and 3, the end of the roller body 10 is provided with a plurality of third mounting holes extending along its length direction. The number of the third mounting holes can be three, and the three third mounting holes can be evenly distributed along the circumference of the roller body 10. A temperature detection component 60 is provided in each third mounting hole. The temperature detection component 60 can be a thermocouple, and one of the end covers 40 is provided with a second through hole passing through it along the thickness direction. The position and number of the second through holes correspond to the position and number of the temperature detection components 60, so that the wiring terminal of each temperature detection component 60 can be exposed from the end cover 40 for connection with the control circuit.

[0063] In this embodiment, the temperature of the roller body 10 is detected at different circumferential positions of the roller body 10 by setting up multiple temperature detection members 60. When in use, the control system can adjust the temperature of the heating member 20 at the corresponding position according to the temperature feedback from the temperature detection member 60, so as to ensure the temperature uniformity of the surface of the roller body 10.

[0064] The present disclosure also provides a rolling device, such as, but not limited to, a pole piece rolling machine or pole piece coating equipment. The rolling device includes the heating roller 100 described in any of the above embodiments. The heating element 20 and temperature detection element 60 of the heating roller 100 are both electrically connected to a control system of the rolling device. Since the heating roller 100 according to the present disclosure has the above-mentioned technical effects, the rolling device according to the present disclosure also has corresponding technical effects, which will not be described in detail in this embodiment.

[0065] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art will understand that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that the above embodiments may be modified without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A heating roller, characterized in that: include: Roller body (10); a plurality of heating elements (20), wherein the plurality of heating elements (20) extend along the length direction of the roller body (10), and the plurality of heating elements (20) are evenly distributed within the roller body (10) along the circumference of the roller body (10); A heat pipe assembly is formed into an annular frame structure, the heat pipe assembly is arranged in the roller body (10), and a plurality of heating elements (20) are located on the inner periphery of the heat pipe assembly.

2. The heating roller according to claim 1, wherein The heat pipe assembly and the roller body (10) are brazed together.

3. The heating roller according to claim 1 or 2, characterized in that In the radial direction of the roller body (10), the minimum distance between the heating element (20) and the circumferential surface of the roller body (10) is smaller than the distance between the heating element (20) and the axis of the roller body (10).

4. The heating roller according to any one of claims 1 to 3, characterized in that The heat pipe assembly (30) comprises: a plurality of first heat pipe sections (31), the first heat pipe sections (31) extending along the length direction of the roller body (10), the plurality of first heat pipe sections (31) being evenly distributed within the roller body (10) along the circumference of the roller body (10), and the distribution density of the first heat pipe sections (31) in the circumference of the roller body (10) being less than the distribution density of the heating element (20); At least one second heat pipe segment (32), the second heat pipe segment (32) is formed as an annular body extending along the circumference of the roller body (10), and the second heat pipe segment (32) connects the plurality of first heat pipe segments (31).

5. The heating roller according to claim 4, wherein The heat pipe assembly (30) comprises two second heat pipe segments (32), wherein one of the second heat pipe segments (32) connects the first ends of a plurality of the first heat pipe segments (31), and the other second heat pipe segment (32) connects the second ends of a plurality of the first heat pipe segments (31).

6. The heating roller according to claim 4 or 5, characterized in that An installation groove (11) is provided at the end of the roller body (10), the installation groove (11) is adapted to the second heat pipe section (32), and the second heat pipe section (32) is provided in the installation groove (11).

7. The heating roller according to any one of claims 4 to 6, characterized in that The roller body (10) is provided with a plurality of first mounting holes penetrating along its length direction, the number of the first mounting holes corresponds to the number of the heating elements (20), and the heating elements (20) fill the entire first mounting holes.

8. The heating roller according to any one of claims 4 to 7, characterized in that The roller body (10) is provided with a plurality of second mounting holes penetrating along its length direction, the number of the second mounting holes corresponds to the number of the first heat pipe sections (31), and the first heat pipe sections (31) fill the entire second mounting holes.

9. The heating roller according to any one of claims 1 to 8, characterized in that Also includes: Two end covers (40), the two end covers (40) are arranged at both ends of the roller body (10), and the end covers (40) are used to fix the heating element (20).

10. The heating roller according to claim 9, wherein The end cover (40) is provided with a plug-in portion (41) on one side close to the roller body (10), and the plug-in portion (41) is plugged into the mounting groove (11). The heating roller further comprises: A sealing member (50) is sleeved on the plug-in portion (41), and the sealing member (50) is used to fill the gap between the plug-in portion (41) and the wall surface of the installation groove (11).

11. The heating roller according to any one of claims 1 to 10, characterized in that Also includes: A plurality of temperature detection members (60) are uniformly distributed in the roller body (10) along the circumference of the roller body (10), and the temperature detection members (60) are used to detect the temperature of the roller body (10).

12. The heating roller according to any one of claims 1 to 11, characterized in that The heating element (20) is formed as an electric heating rod extending along the length direction of the roller body (10).

13. A rolling device, characterized in that: The heating roller according to any one of claims 1 to 12 is included.

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