Electric heating plate for vulcanizing machine and manufacturing method of electric heating plate

Abstract

The invention relates to an electric heating plate, in particular to an electric heating plate for a vulcanizing machine and a manufacturing method of the electric heating plate. The device comprises a heat conduction device and an electric heating device arranged at the top of the heat conduction device, the heat conduction device comprises a heat conduction plate, the electric heating device comprises an electric heating wire, the electric heating wire is sleeved with a plurality of insulating ceramic chips, and a positioning structure is arranged on one side of the heat conduction plate and used for pressing the insulating ceramic chips and fixing the positions of the insulating ceramic chips. According to the invention, the plurality of insulating ceramic chips are sleeved outside the electric heating wire, so that the insulating ceramic chips can be bent along with the electric heating wire and can adapt to different application scenes, and meanwhile, when the heat conducting plate is heated, the plurality of insulating ceramic chips are pressed together by the push block, so that gaps between the adjacent insulating ceramic chips are eliminated, and the heat conductivity is improved; and compared with a common tubular structure, the insulation breakdown phenomenon caused by moisture absorption can be effectively avoided, and the heat conductivity can also be improved.

Description

Technical Field

[0001] The invention relates to an electric heating plate, in particular to an electric heating plate for a vulcanizing machine and a manufacturing method thereof. Background Art

[0002] The existing electric heating plate is a metal plate with holes or grooves punched on it and then the electric heating tube is installed in the holes or grooves. The electric heating tube is composed of three parts: an electric heating metal wire in the middle, an insulating material and a protective tube. When the electric heating alloy wire is energized and heated, the heat is transferred to the metal plate through the insulating material and then through the protective tube. Because the insulating material is magnesium oxide and the protective tube material is generally stainless steel, the thermal conductivity of magnesium oxide and stainless steel is not high. Therefore, when the heating power per unit area is large, the heat generated by the electric heating wire cannot be transferred to the metal plate in time, which will cause the temperature of the electric heating wire to rise rapidly and melt and be damaged. In addition, magnesium oxide itself is easy to absorb moisture and will cause insulation breakdown. Therefore, an electric heating plate for a vulcanizer and a manufacturing method thereof are proposed. Summary of the invention

[0003] The object of the present invention is to provide an electric heating plate for a vulcanizing machine and a manufacturing method thereof, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, one of the purposes of the present invention is to provide an electric heating plate for a vulcanizer, comprising a heat-conducting device and an electric heating device arranged on the top of the heat-conducting device, the heat-conducting device comprising a heat-conducting plate, the electric heating device comprising an electric heating wire, a plurality of insulating ceramic sheets are sheathed on the outside of the electric heating wire, a positioning structure is provided on one side of the heat-conducting plate, and the positioning structure is used to press the plurality of insulating ceramic sheets and fix the position of the insulating ceramic sheets.

[0005] As a further improvement of the technical solution, the insulating ceramic sheet is a high thermal conductivity ceramic sheet material.

[0006] As a further improvement of the technical solution, two adjacent insulating ceramic sheets are bonded together, a placement groove is provided on the top of the heat conducting plate, and the side wall of the insulating ceramic sheet is bonded to the inner wall of the placement groove.

[0007] As a further improvement of the present technical solution, the positioning structure includes two push blocks, the top ends of the push blocks are fixedly connected to a push frame, the push frame is bonded to one of the insulating ceramic sheets, and a push structure is provided on one side of the push frame, and the push structure is used to provide a thrust to the push frame.

[0008] As a further improvement of the present technical solution, the pushing structure includes two thrust springs, two slide grooves are provided at the top of the heat conducting plate, the two slide grooves are respectively located on both sides of the placement groove, the thrust spring is arranged inside the slide groove, a slider is slidingly arranged inside the slide groove, the slider is fixedly connected to the pushing frame, one end of the slider is fixedly connected to the thrust spring, and the thrust spring is used to give the slider a thrust.

[0009] As a further improvement of the technical solution, one end of the heat conducting plate is fixedly connected to a connecting plate, and the top of the connecting plate is fixedly connected to two blocking blocks, one side of one of the blocking blocks is in contact with the heat conducting plate, and when the pushing block pushes the insulating ceramic piece, the blocking block limits the movement of the insulating ceramic piece.

[0010] The second object of the present invention is to provide a method for manufacturing an electric heating plate for a vulcanizing machine, comprising the electric heating plate for a vulcanizing machine described in any one of the above, comprising the following method steps:

[0011] S1. Put a number of insulating ceramic sheets on the heating wire;

[0012] S2. Fix a plurality of insulating tiles on the heat conducting plate through the positioning structure, and press the plurality of insulating tiles tightly to avoid gaps between two adjacent insulating tiles.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In the electric heating plate for the vulcanizer and the manufacturing method thereof, a plurality of insulating ceramic sheets are sleeved on the outside of the electric heating wire. With this arrangement, the insulating ceramic sheets can be bent along with the electric heating wire and can adapt to different application scenarios. At the same time, when the heat conductive plate is heated, the push block presses the plurality of insulating ceramic sheets together to eliminate the gaps between adjacent insulating ceramic sheets and improve the thermal conductivity. Compared with the common tubular structure, it can effectively avoid the insulation breakdown caused by moisture absorption and can also improve the thermal conductivity.

[0015] 2. In the electric heating plate for the vulcanizer and the manufacturing method thereof, after the insulating ceramic piece is installed in the placement groove, the thrust spring enables the push block to press the insulating ceramic piece tightly to prevent it from shaking and falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic structural diagram of the heat conducting device of the present invention;

[0018] Figure 3 It is a schematic structural diagram of the electric heating device of the present invention.

[0019] The meaning of each number in the figure is:

[0020] 1. Heat conduction device;

[0021] 11. heat conducting plate; 12. slide groove; 13. connecting plate; 14. blocking block; 15. pushing frame; 16. pushing block; 17. sliding block; 18. thrust spring; 19. placement groove;

[0022] 2. Electric heating device;

[0023] 21. Heating wire; 22. Insulating ceramic sheet. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, 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" 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 invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] Example 1

[0027] See also Figure 1-Figure 3 As shown, one of the purposes of this embodiment is that the outer sheath of the existing electric heating wire is provided with an insulating material and a protective tube. When the electric heating wire is energized and heated, the heat is transferred to the metal plate through the insulating material and then through the protective tube. The current insulating material generally uses magnesium oxide, and the protective tube material generally uses stainless steel. The thermal conductivity of magnesium oxide and stainless steel is not high. Therefore, when the heating power per unit area is large, the heat generated by the electric heating wire cannot be transferred out in time, which will cause the temperature of the electric heating wire to rise rapidly, resulting in melting and damage, and magnesium oxide easily absorbs moisture, resulting in insulation breakdown. Therefore, an electric heating plate for a vulcanizer is provided, including a heat conducting device 1 and an electric heating device 2 arranged on the top of the heat conducting device 1. The common method of wrapping the electric heating wire with a tubular structure has a low thermal conductivity. Therefore, in order to improve the thermal conductivity, the method of wrapping the electric heating wire with a tubular structure is abandoned.

[0028] To this end, a new insulating heat conduction method is provided, wherein the heat conduction device 1 comprises a heat conduction plate 11, and the electric heating device 2 comprises an electric heating wire 21. The electric heating wire 21 is provided with a plurality of insulating ceramic sheets 22 on its outer surface. In order to improve the thermal conductivity of the electric heating wire 21, the insulating ceramic sheets 22 are made of high thermal conductivity ceramic sheet materials. The high thermal conductivity ceramic materials have the advantages of high thermal conductivity efficiency, high temperature resistance, high pressure resistance, uniform heating, fast heat dissipation, simple and compact structure, etc. Preferably, AIN ceramic materials are used. The thermal conductivity of AIN ceramic materials is about 10 times that of magnesium oxide, and the thermal conduction effect is significantly improved.

[0029] In order to improve the thermal conductivity, the present invention adopts multiple strands of metal wire as the conductor of the heating wire 21, and selects high thermal conductivity ceramic sheet material as the insulator. The advantage of this design is that, on the one hand, the multiple strands of metal wire have a certain deformation margin during the thermal expansion and contraction process, thereby avoiding damage caused by thermal stress; on the other hand, the thin sheet structure of the high thermal conductivity ceramic material makes the surface temperature of the heating wire 21 lower, reducing the risk of oxidation and corrosion, thereby significantly extending the service life of the heating wire 21.

[0030] In addition, ceramic materials with good thermal conductivity such as BeO ceramics, Si3N4 ceramics and SiC ceramics can also be used. Based on the above advantages, the insulating ceramic sheets 22 are set to be thin sheets, and several insulating ceramic sheets 22 can support the heating wire 21 to bend so as to adapt to different application scenarios. Compared with the existing tubular structure, there will be no insulation breakdown due to moisture absorption, which greatly extends the service life of the heating wire.

[0031] In addition, since the thermal conductivity of air is very low, and if a gap appears between two insulating ceramic sheets 22, some heat will escape through the air. Therefore, two adjacent insulating ceramic sheets 22 are fitted together, and a placement groove 19 is provided on the top of the heat conducting plate 11. The side walls of the insulating ceramic sheets 22 and the inner walls of the placement groove 19 fit together. A number of insulating ceramic sheets 22 are sleeved on the outer wall of the heating wire 21, which can ensure that the insulating ceramic sheets 22 can quickly transfer the heat generated by the heating wire 21 to the heat conducting plate 11 and avoid a large amount of heat loss.

[0032] In addition, after the insulating ceramic tile 22 is installed inside the mounting groove 19, the insulating ceramic tile 22 will shake due to the influence of external force. At this time, gaps will be generated between the insulating ceramic tiles 22, affecting the thermal conductivity of the insulating ceramic tiles 22. For this reason, a positioning structure is provided on one side of the heat conducting plate 11. The positioning structure is used to press a plurality of insulating ceramic tiles 22 and fix the position of the insulating ceramic tiles 22. The positioning structure includes two push blocks 16. The top of the push block 16 is fixedly connected to a push frame 15. The push frame 15 is fitted with one of the insulating ceramic tiles 22. A push structure is provided on one side of the push frame 15. The push structure is used to provide a thrust to the push frame 15. The push structure provides a thrust to the push block 16. The push frame 15 applies a thrust to the insulating ceramic tile 22 through the push block 16, so as to press a plurality of insulating ceramic tiles 22 tightly together and avoid gaps between the insulating ceramic tiles 22.

[0033] In summary, it is necessary to provide a thrust to the pushing frame 15, and the pushing structure includes two thrust springs 18. Two slide grooves 12 are provided at the top of the heat conducting plate 11, and the two slide grooves 12 are respectively located on both sides of the placement groove 19. The thrust spring 18 is arranged inside the slide groove 12, and a slider 17 is slidingly arranged inside the slide groove 12. The slider 17 is fixedly connected to the pushing frame 15, and one end of the slider 17 is fixedly connected to the thrust spring 18. The thrust spring 18 is used to give a thrust to the slider 17, and the thrust spring 18 continuously provides a thrust to the slider 17. At this time, the push block 16 applies pressure to the insulating ceramic tile 22, and the operation is simple. When installing the insulating ceramic tile 22, you only need to push the pushing frame 15 to make the slider 17 slide to overcome the elastic force of the thrust spring 18.

[0034] When the push block 16 applies a thrust to the insulating ceramic piece 22 on one side, it is also necessary to block the insulating ceramic piece 22 on the other side, so that the insulating ceramic piece 22 will not shake. Therefore, one end of the heat conducting plate 11 is fixedly connected to the connecting plate 13, and the top of the connecting plate 13 is fixedly connected to two blocking blocks 14, one side of which is in contact with the heat conducting plate 11. When the push block 16 pushes the insulating ceramic piece 22, the blocking block 14 limits the movement of the insulating ceramic piece 22, and the blocking block 14 blocks the movement of the insulating ceramic piece 22. With the cooperation of the push block 16 and the blocking block 14, several insulating ceramic pieces 22 are fixed in the mounting groove 19 and will no longer shake, and there will be no gaps between the insulating ceramic pieces 22 to affect the heat transfer.

[0035] Furthermore, an aluminum plate or a copper plate may be disposed on the top of the heat conducting plate 11 to further prevent the insulating ceramic sheet 22 from falling off and to make the overall temperature of the heat conducting plate 11 more uniform.

[0036] The second purpose of this embodiment is to provide a method for manufacturing an electric heating plate for a vulcanizing machine, including any one of the above-mentioned electric heating plates for a vulcanizing machine, comprising the following method steps:

[0037] S1, a plurality of insulating ceramic sheets 22 are placed on the heating wire 21;

[0038] S2. Fix a plurality of insulating ceramic sheets 22 on the heat conducting plate 11 through the positioning structure, and press the plurality of insulating ceramic sheets 22 tightly to avoid a gap between two adjacent insulating ceramic sheets 22 .

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An electric heating plate for a vulcanizing machine, characterized in that: The invention comprises a heat conducting device (1) and an electric heating device (2) arranged on the top of the heat conducting device (1), wherein the heat conducting device (1) comprises a heat conducting plate (11), and the electric heating device (2) comprises a heating wire (21), wherein a plurality of insulating ceramic sheets (22) are sheathed on the outside of the heating wire (21), and a positioning structure is provided on one side of the heat conducting plate (11), wherein the positioning structure is used to press the plurality of insulating ceramic sheets (22) and fix the position of the insulating ceramic sheets (22).

2. The electric heating plate for a vulcanizing machine according to claim 1, characterized in that: The insulating ceramic sheet (22) is made of a high thermal conductivity ceramic sheet material.

3. The electric heating plate for a vulcanizing machine according to claim 1, characterized in that: Two adjacent insulating ceramic sheets (22) are fitted together, a placement groove (19) is provided on the top of the heat conducting plate (11), and the side walls of the insulating ceramic sheets (22) are fitted together with the inner walls of the placement groove (19).

4. The electric heating plate for vulcanizing machine according to claim 3, characterized in that: The positioning structure comprises two push blocks (16), the top ends of the push blocks (16) are fixedly connected to a push frame (15), the push frame (15) is fitted with one of the insulating ceramic sheets (22), and a push structure is provided on one side of the push frame (15), and the push structure is used to provide a thrust to the push frame (15).

5. The electric heating plate for vulcanizing machine according to claim 4, characterized in that: The pushing structure comprises two thrust springs (18). Two slide grooves (12) are provided at the top of the heat conducting plate (11). The two slide grooves (12) are respectively located at the two sides of the placement groove (19). The thrust spring (18) is arranged inside the slide groove (12). A slider (17) is slidably arranged inside the slide groove (12). The slider (17) is fixedly connected to the pushing frame (15). One end of the slider (17) is fixedly connected to the thrust spring (18). The thrust spring (18) is used to give the slider (17) a thrust.

6. The electric heating plate for a vulcanizing machine according to claim 4, characterized in that: One end of the heat conducting plate (11) is fixedly connected to a connecting plate (13), and the top of the connecting plate (13) is fixedly connected to two blocking blocks (14), one side of one of the blocking blocks (14) is in contact with the heat conducting plate (11), and when the pushing block (16) pushes the insulating ceramic sheet (22), the blocking block (14) limits the movement of the insulating ceramic sheet (22).

7. A method for manufacturing an electric heating plate for a vulcanizing machine, comprising the electric heating plate for a vulcanizing machine according to claim 1, characterized in that: The method comprises the following steps: S1, a plurality of insulating ceramic sheets (22) are placed on the heating wire (21); S2. Fixing a plurality of insulating ceramic sheets (22) on the heat conducting plate (11) through a positioning structure, and pressing the plurality of insulating ceramic sheets (22) tightly to avoid a gap between two adjacent insulating ceramic sheets (22).

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