Electromagnetic heating roller and winding method thereof

Abstract

The invention discloses an electromagnetic heating roller and a winding method thereof.The electromagnetic heating roller comprises a roller body, a plurality of through holes are evenly formed in the circumferential direction of the roller body in a penetrating mode, and the number of the through holes is an even number; and the winding wires sequentially penetrate through the through holes and are wound on the roller body. The winding wire sequentially penetrates through the through holes, when the winding wire is powered on, the magnetic field density in the axial length direction of the roller body is completely consistent, the magnetic field offset phenomenon is not prone to being generated between the coils, and due to the fact that the coils at the two ends and the middle of the roller body are distributed consistently, the generation amount of induced current is consistent; the roller body generates relatively uniform eddy current when cutting alternating magnetic lines of force, the self impedance characteristic of the roller body realizes automatic heating and consistent temperature difference, and the problems of non-uniform heating and complex winding of an electromagnetic heating roller in the prior art are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic heating roller technology, and more particularly to an electromagnetic heating roller and its winding method. Background Technology

[0002] Electromagnetic heating rollers are widely used in processes such as hot pressing, calendering, drying, stretching, surface calendering, and laser anti-counterfeiting molding of materials. They are based on the principle of electromagnetic induction heating. The power control module rectifies and inverts the industrial frequency AC power into a high-frequency alternating current of 20-40kHz. This current generates a high-speed changing magnetic field through the coils on the inner or outer surface of the roller, causing the metal roller to cut the alternating magnetic lines of force to generate eddy currents. The roller achieves self-heating by utilizing its own impedance characteristics, and then the heat is transferred to the workpiece through heat conduction. Compared to traditional heating rollers, electromagnetic heating rollers have significant advantages: a wide operating temperature range (freely adjustable from 50-420℃), breaking through the temperature limitations of traditional heating methods; high temperature control accuracy, with roller surface temperature error controllable within ±1℃, and some high-end products even reaching ±0.5℃; no need for heat transfer media such as heat transfer oil or steam, completely eliminating pollution and safety hazards caused by media leakage, achieving clean production; high thermal efficiency, reducing energy consumption by more than 50% compared to traditional heat transfer oil heating rollers, and a compact structure, requiring little installation space and convenient maintenance.

[0003] The existing electromagnetic heating rollers have the following technical defects that urgently need to be addressed: First, the temperature uniformity control is insufficient. Due to the limitations of the coil arrangement on the inner or outer surface of the roller, the magnetic field density along the axial length of the roller is difficult to be completely consistent, and magnetic field cancellation is easily generated between coils. In particular, due to insufficient coil distribution at both ends of the roller, the amount of induced current generated is small, and the temperature is significantly lower than that in the middle area, which seriously affects the consistency of product processing. Second, the winding method is relatively complex, which makes its manufacturing cost high. Therefore, an electromagnetic heating roller and its winding method are provided to solve the above problems. Summary of the Invention

[0004] One of the objectives of this invention is to provide an electromagnetic heating roller and its winding method, so as to solve the problems of uneven heating and complex winding of existing electromagnetic heating rollers.

[0005] The electromagnetic heating roller and its winding method of the present invention can be achieved through the following technical solutions: The present invention provides an electromagnetic heating roller comprising: The roller body has multiple through holes evenly distributed around its circumference, and the number of the through holes is even. At least one set of windings, which sequentially pass through multiple through holes and are wound around the roller body.

[0006] In one embodiment, a group of the windings sequentially pass through a plurality of the through holes and are wound around the roller body, with both ends of the windings located on the same side of the roller body.

[0007] In one embodiment, multiple sets of windings sequentially pass through the corresponding through holes and are wound around the roller body.

[0008] In one embodiment, the multiple sets of windings are connected in parallel or in series.

[0009] In one embodiment, the winding is made of insulated metal wire.

[0010] In one embodiment, the roller body includes a main roller body, which is a cylindrical hollow metal cavity. A plurality of through holes are uniformly disposed circumferentially through the solid part of the main roller body. One or more sets of winding wires are sequentially wound around the main roller body through the plurality of through holes. Two shaft ends are respectively disposed on opposite sides of the main roller body.

[0011] The present invention provides a winding method for an electromagnetic heating roller, applicable to any of the electromagnetic heating rollers described above, comprising the following steps: S1, a plurality of through holes are evenly and equidistantly arranged in the circumferential direction of the roller body; S2, one or more sets of the windings sequentially pass through multiple through holes, thereby setting the windings in the roller body and winding them around the opposite sides of the roller body, and such that the two ends of the same set of windings are set on the same side of the roller body. S3, When multiple sets of the winding are used for winding, the multiple sets of winding are connected in parallel or in series.

[0012] Compared with the prior art, the beneficial effects of the electromagnetic heating roller and its winding method of the present invention are as follows: This invention discloses an electromagnetic heating roller and its winding method. Multiple through holes are uniformly arranged along the circumferential direction of the roller body. The winding wire passes through these holes sequentially. When the winding wire is energized, a magnetic field density along the axial length of the roller body is completely consistent, minimizing magnetic field cancellation between coils. The coil distribution is consistent between the two ends and the middle of the roller body, resulting in consistent induced current generation. When the roller body cuts alternating magnetic lines of force, relatively uniform eddy currents are generated. The roller body's own impedance characteristics enable self-heating with a consistent temperature difference. Simultaneously, heat is evenly transferred to the surface of the roller body through the thermal conduction of the metal surrounding the through holes. This effectively solves the problems of uneven heating and complex winding in existing electromagnetic heating rollers. Furthermore, the solid cylindrical wall of the roller body allows winding without opening the shaft head, eliminating the traditional steps of disassembling and assembling the shaft head to install the internal heating coil, thus improving assembly efficiency to some extent. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural schematic diagram of an electromagnetic heating roller according to the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of an electromagnetic heating roller according to the present invention.

[0015] The diagram shows: 10, electromagnetic heating roller; 11, roller body; 111, main roller body; 1111, through hole; 112, shaft head; 12, winding. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0018] Please see Figure 1 and Figure 2 As shown, an electromagnetic heating roller 10 of the present invention may include a roller body 11 and at least one set of windings 12. The roller body 11 has a plurality of through holes 1111 evenly distributed circumferentially, and the number of through holes 1111 is even. At least one set of windings 12 sequentially passes through the plurality of through holes 1111 and is wound around the roller body 11. Specifically, the windings 12 are made of insulated metal wires to prevent short circuits caused by contact with the roller body 11. In this embodiment, one set of windings 12 sequentially passes through the plurality of through holes 1111 and is wound around the roller body 11, with both ends located on the same side of the roller body 11, facilitating connection between the windings 12 and an electric slip ring (not shown in the figure). The function of the electric slip ring is to transfer electrical energy to the windings 12 during the operation of the electromagnetic heating roller 10. In other embodiments, multiple sets of windings 12 sequentially pass through corresponding through holes 1111 and are wound around the roller body 11. The sets of windings 12 can be connected in parallel or in series.

[0019] Please see Figure 1 As shown, in this embodiment, the roller body 11 includes a main roller body 111 and two shaft heads 112; the main roller body 111 is a cylindrical hollow metal cavity, and multiple through holes 1111 are uniformly arranged circumferentially through the solid part of the main roller body 111. One or more sets of winding wires 12 are wound around the main roller body 111 in sequence through the multiple through holes 1111; the two shaft heads 112 are respectively arranged on opposite sides of the main roller body 111.

[0020] The present invention discloses a winding method for an electromagnetic heating roller, comprising the following steps: S1, Multiple through holes 1111 are evenly and equidistantly arranged in the circumferential direction of the roller body 11; S2, one or more sets of windings 12 pass through multiple through holes 1111 in sequence, thereby setting the windings 12 in the roller body 11 and winding them on opposite sides of the roller body 11, and setting the two ends of the same set of windings 12 on the same side of the roller body 11. S3, When multiple sets of the winding wire 12 are used for winding, the multiple sets of winding wire 12 are connected in parallel or in series.

[0021] It should be noted that the electromagnetic heating roller and its winding method of the present invention uniformly arrange multiple through holes 1111 in the circumferential direction of the roller body 11, and then the winding 12 passes through the multiple through holes 1111 in sequence. When the winding 12 is energized, the magnetic field density generated along the axial length direction of the roller body 11 is completely consistent, and the magnetic field cancellation phenomenon between the coils is not easy. In particular, the coil distribution at both ends and the middle of the roller body 11 is consistent, and the amount of induced current generated is consistent. When the roller body 11 cuts the alternating magnetic lines of force, it generates relatively uniform eddy currents. The self-resistance characteristics of the roller body 11 achieve self-heating and consistent temperature difference. The heat is uniformly transferred to the surface of the roller body 11 through the thermal conduction of the metal around the through holes 1111.

[0022] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0023] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An electromagnetic heating roller, characterized in that, include: The roller body has multiple through holes evenly distributed around its circumference, and the number of the through holes is even. At least one set of windings, which sequentially pass through multiple through holes and are wound around the roller body.

2. The electromagnetic heating roller according to claim 1, characterized in that, A set of the windings sequentially passes through multiple through holes and is wound around the roller body, with both ends of the windings located on the same side of the roller body.

3. The electromagnetic heating roller according to claim 1, characterized in that, Multiple sets of windings are sequentially wound around the roller body through the corresponding through holes.

4. An electromagnetic heating roller according to claim 3, characterized in that, Multiple sets of windings are connected in parallel or in series.

5. An electromagnetic heating roller according to claim 1, characterized in that, The winding uses insulated metal wire.

6. An electromagnetic heating roller according to claim 1, characterized in that, The roller body includes a main roller body, which is a cylindrical hollow metal cavity. Multiple through holes are evenly arranged circumferentially through the solid part of the main roller body. One or more sets of winding wires are sequentially wound around the main roller body through the multiple through holes. Two shaft ends are respectively arranged on opposite sides of the main roller body.

7. A winding method for an electromagnetic heating roller, applied to the electromagnetic heating roller according to any one of claims 1-6, characterized in that, Includes the following steps: S1, a plurality of through holes are evenly and equidistantly arranged in the circumferential direction of the roller body; S2, one or more sets of the windings sequentially pass through multiple through holes, thereby setting the windings in the roller body and winding them around the opposite sides of the roller body, and such that the two ends of the same set of windings are set on the same side of the roller body. S3, When multiple sets of the winding are used for winding, the multiple sets of winding are connected in parallel or in series.

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