A micro enameled wire painting die

Abstract

The present invention discloses a fine enameled wire painting mold, comprising a painting sleeve body, wherein the outer surface of the painting sleeve body is located in the middle part and is equidistantly fixed with a plurality of support rods in the circumferential direction, a fixing sleeve is fixed between one end of the plurality of support rods, a gap is left between the inner wall of the fixing sleeve and the outer surface of the painting sleeve body, an annular opening is provided between the top of the fixing sleeve and the outer surface of the painting sleeve body, an annular gasket is provided inside the annular opening, and the inner wall of the annular gasket is fitted with the outer surface of the painting sleeve body. The present invention solves the problem that the existing painting method cannot well control the thickness of the paint film painted on the outer surface of the enameled wire when painting the enameled wire, resulting in that the paint in the thinner area of ​​the outer surface of the enameled wire is prone to cracking during actual use, and the paint film is subjected to different bending forces than the thicker area when bending, resulting in local paint film shedding, affecting people's use.

Description

Technical Field

[0001] The invention relates to the technical field of enameled wire coating, in particular to a micro enameled wire coating die. Background Art

[0002] my country has over a thousand enameled wire manufacturers, with an annual production capacity exceeding 250,000 to 300,000 tons. However, the overall situation of enameled wire in my country is characterized by low-quality duplication: high output, low quality, and outdated equipment. Under these circumstances, high-quality enameled wire for home appliances still needs to be imported, leaving China unable to compete in the international market. Therefore, redoubled efforts are needed to change this situation, ensuring that my country's enameled wire technology keeps pace with market demand and enters the international market. Enameled wire, a major type of winding wire, consists of a conductor and an insulation layer. The bare wire is annealed and softened, then subjected to multiple coats of paint and baking. However, producing products that meet both standard requirements and customer specifications is challenging. This is influenced by factors such as raw material quality, process parameters, production equipment, and environmental factors. Consequently, the quality characteristics of various enameled wires vary, but they all possess four key properties: mechanical, chemical, electrical, and thermal properties.

[0003] At present, when painting enameled wire, the existing painting method cannot well control the thickness of the paint film applied on the outer surface of the enameled wire, resulting in that the paint on the thinner areas of the outer surface of the enameled wire is prone to cracking during actual use. In addition, when bending, the paint film withstands different bending forces than the thicker areas, resulting in local paint film falling off, affecting people's use.

[0004] Therefore, we propose a micro-enameled wire painting die to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a fine enameled wire painting mold to solve the problem that the existing painting method cannot well control the thickness of the paint film applied on the outer surface of the enameled wire when painting the enameled wire, resulting in the paint in the thinner areas of the outer surface of the enameled wire easily cracking during actual use, and when bending, the paint film is subjected to different bending forces than the thicker areas, resulting in local paint film shedding, affecting people's use.

[0006] To achieve the above purpose, the present invention comprises a paint brush cover body, wherein a plurality of support rods are fixed at equal intervals along the circumferential direction at the middle portion of the outer surface of the paint brush cover body, a fixing cover is fixed between one end of the plurality of support rods, a gap is left between the inner wall of the fixing cover and the outer surface of the paint brush cover body, an annular opening is provided between the top of the fixing cover and the outer surface of the paint brush cover body, an annular gasket is provided inside the annular opening, the inner wall of the annular gasket is in contact with the outer surface of the paint brush cover body, and the outer surface of the paint brush cover body is provided with an inner cavity;

[0007] A support sleeve is fixed on the top of the annular gasket near the edge of the inner wall, and the support sleeve extends into the inner cavity. An annular ring is provided on the top of the support sleeve, and the annular ring is located inside the inner cavity. A plurality of blocks are fixed on the top of the annular ring at equal distances along the circumferential direction. A sealing ring is fixed on the middle part of the outer surface of the support sleeve, and an adjusting ring is provided inside the annular opening. The bottom of the adjusting ring fits with the top of the annular gasket, and an annular groove is provided on the inner wall of the adjusting ring in the middle part. The sealing ring is located inside the annular groove. A guide groove is provided between the inner walls of the adjusting ring near the top edge, and a side groove is provided on the inner bottom surface of the guide groove near one side edge.

[0008] Preferably, a guide plate is slidably connected to the inside of the guide groove, one end of the guide plate extends to one side inner wall of the guide groove, a side plate is fixed to the bottom of the guide plate, and the side plate extends to the inside of the side groove, a pressure tube is fixed to the top of the adjustment ring near the edge of the inner wall, and a buffer plate is provided on the inner top surface of the inner cavity.

[0009] Preferably, the bottom of the buffer plate fits in contact with the top of the pressure tube, the inner wall of the pressure tube fits in contact with the outer surface of the annular ring, the inner wall of the inner cavity and the outer surface of the pressure tube are threadedly connected, the inner wall of the pressure tube and the outer surface of the annular ring are sealed, and the inner wall and bottom surface of the annular ring are sealed to the inner bottom surface and side walls of the inner cavity.

[0010] Preferably, a plurality of side holes are opened at equal distances along the circumferential direction between the inner walls of the paint brush cover body near the top edge, and the plurality of side holes are correspondingly penetrated to the inner top surface of the inner cavity, and a plurality of injection holes are opened at equal distances along the circumferential direction on the inner wall of one side of the inner cavity, and the plurality of injection holes are penetrated to the interior of the paint brush cover body.

[0011] Preferably, an annular docking plate is fixed on the top of the coating sleeve body, a heat-conducting sleeve is provided inside the fixed sleeve, the inner wall of the heat-conducting sleeve is fitted with the outer surface of the coating sleeve body, and a plurality of heat-conducting plates are fixed on the outer surface of the heat-conducting sleeve at equal distances along the circumferential direction.

[0012] Preferably, one side of the plurality of heat-conducting plates is in contact with the inner wall of the fixed sleeve, and flange connection plates are fixed to the bottom of the heat-conducting sleeve and the bottom of the fixed sleeve. The outer surface of the fixed sleeve is provided with a plurality of side openings equidistantly along the circumferential direction, and the plurality of side openings pass through the interior of the fixed sleeve. The bottom of the heat-conducting sleeve is provided with a plurality of openings equidistantly along the circumferential direction, and the plurality of openings pass through between the opposite sides of the heat-conducting plates.

[0013] Preferably, the plurality of blocks correspond to the plurality of injection holes, the top of the fixed sleeve is provided with two positioning grooves, the bottom of the adjustment ring is provided with a movable groove near one side edge, a rotating shaft is fixed between the inner walls on both sides of the movable groove, and a positioning block is fixed at the bottom of the rotating shaft.

[0014] Preferably, a spherical handle is fixed on the outer surface of one side of the positioning block, the positioning block is engaged in the interior of one of the positioning slots, and the heat-conducting sleeve and the fixing sleeve are fixed via a flange connection plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When in use, the external paint needs to be clamped inside the coating sleeve body through the external pipe, and the side hole inside the coating sleeve body is separated from the injection hole, so that the molten paint in the external pipe enters the inner cavity through the side hole, and then is buffered by the buffer plate inside the inner cavity, and finally flows into the interior of the coating sleeve body through the injection hole. When in use, the enameled wire is passed through the interior of the coating sleeve body, and a certain gap is left between the enameled wire and the inner wall of the coating sleeve body, so that the molten paint can be evenly applied to the outer surface of the enameled wire inside the coating sleeve body. Since the injection holes are equidistantly arranged along the circumferential direction inside the coating sleeve body, the molten paint can be evenly spread, thereby improving the quality of painting.

[0017] 2. When painting, first, the pressure tube is driven by the adjusting ring to press the buffer plate against the inner top surface of the inner cavity, so that the molten paint can be buffered. Then, when painting, the support sleeve is rotated by rotating the annular ring, which can drive the multiple blocks on the annular ring to rotate, so that the blocks are separated from the injection holes, so that the molten paint in the inner cavity can pass through the injection holes into the interior of the painting sleeve body. When not in use, only the annular ring needs to be rotated in the opposite direction to isolate the injection hole from the inner cavity through the blocks, thereby completing the sealing.

[0018] 3. When rotating the annular ring to control the opening and closing of the injection hole, the annular ring can be fixed by cooperating with the positioning block and the positioning groove to prevent the annular ring from sliding during operation and causing the injection hole to close. During installation, the adjustment ring and the support sleeve can be sealed by cooperating with the sealing ring and the annular groove. The sealing effect can be enhanced by the guide groove and guide plate as well as the side groove and side plate. The sealing ring, guide plate and side plate are all made of rubber, which enhances the sealing performance of the sealing ring, guide plate and side plate. A heat-conducting sleeve and a heat-conducting plate are arranged between the outer surface of the coating sleeve body and the inner wall of the fixed sleeve, so that the paint-coated paint wire can be condensed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a front perspective view of a fine enameled wire painting die according to the present invention;

[0020] Figure 2 This is a bottom perspective view of a fine enameled wire painting die according to the present invention;

[0021] Figure 3 A side perspective view of a fine enameled wire coating die according to the present invention;

[0022] Figure 4 This is a sectional perspective view of a fine enameled wire coating die according to the present invention;

[0023] Figure 5 For the present invention Figure 3 A partial enlarged view of point A in the middle;

[0024] Figure 6 For the present invention Figure 4 A partial enlarged view of point B in the middle;

[0025] Figure 7 For the present invention Figure 4 A partial enlarged view of point C in the middle.

[0026] In the picture:

[0027] 1. Brush sleeve body; 2. Annular docking plate; 3. Flange connection plate; 4. Side opening; 5. Adjustment ring; 6. Side hole; 7. Heat-conducting sleeve; 8. Heat-conducting plate; 9. Opening; 10. Fixed sleeve; 11. Injection hole; 12. Movable groove; 13. Rotating shaft; 14. Positioning block; 15. Spherical handle; 16. Positioning groove; 17. Inner cavity; 18. Buffer plate; 19. Press tube; 20. Annular ring; 21. Stop block; 22. Annular groove; 23. Sealing ring; 24. Guide groove; 25. Side groove; 26. Guide plate; 27. Side plate; 28. Annular opening; 29. ​​Annular gasket; 30. Support rod; 31. Support sleeve. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] See also Figure 1-7The present invention provides a technical solution: a fine enameled wire painting mold, comprising a coating sleeve body 1, a plurality of support rods 30 are fixed at equal intervals along the circumferential direction at the middle part of the outer surface of the coating sleeve body 1, a fixed sleeve 10 is fixed between one end of the plurality of support rods 30, a gap is left between the inner wall of the fixed sleeve 10 and the outer surface of the coating sleeve body 1, an annular opening 28 is provided between the top of the fixed sleeve 10 and the outer surface of the coating sleeve body 1, an annular gasket 29 is provided inside the annular opening 28, the inner wall of the annular gasket 29 is fitted with the outer surface of the coating sleeve body 1, an inner cavity 17 is provided on the outer surface of the coating sleeve body 1, and a support is fixed on the top of the annular gasket 29 near the edge of the inner wall. The sleeve 31 extends through the inner cavity 17. An annular ring 20 is provided on the top of the support sleeve 31. The annular ring 20 is located inside the inner cavity 17. A plurality of blocks 21 are fixed to the top of the annular ring 20 at equal intervals along the circumferential direction. A sealing ring 23 is fixed to the middle part of the outer surface of the support sleeve 31. An adjusting ring 5 is provided inside the annular opening 28. The bottom of the adjusting ring 5 fits with the top of the annular gasket 29. An annular groove 22 is provided on the inner wall of the adjusting ring 5 in the middle part. The sealing ring 23 is located inside the annular groove 22. A guide groove 24 is provided between the inner walls of the adjusting ring 5 near the top edge. A side groove 25 is provided on the inner bottom surface of the guide groove 24 near one side edge.

[0030] The effect achieved is that when in use, the external paint needs to be clamped in the interior of the paint sleeve body 1 through the external pipe, and the side hole 6 inside the paint sleeve body 1 is separated from the injection hole 11, so that the molten paint in the external pipe enters the inner cavity 17 through the side hole 6, and then passes through the buffer plate 18 inside the inner cavity 17, and finally flows into the interior of the paint sleeve body 1 through the injection hole 11. When in use, the enameled wire is passed through the interior of the paint sleeve body 1, and a certain gap is left between the enameled wire and the inner wall of the paint sleeve body 1, so that the molten paint can be evenly applied to the outer surface of the enameled wire inside the paint sleeve body 1. Since the injection holes 11 are equidistantly arranged along the circumferential direction inside the paint sleeve body 1, the molten paint can be evenly diffused, thereby improving the quality of painting.

[0031] like Figure 2-7As shown, the guide groove 24 is internally slidably connected with a guide plate 26, one end of the guide plate 26 extends to one side inner wall of the guide groove 24, the bottom of the guide plate 26 is fixed with a side plate 27, and the side plate 27 extends to the inside of the side groove 25, and the top of the adjusting ring 5 is fixed with a pressure tube 19 near the edge of the inner wall, and the internal top surface of the inner cavity 17 is provided with a buffer plate 18, and the bottom of the buffer plate 18 fits with the top of the pressure tube 19. The inner wall of the pressure tube 19 fits with the outer surface of the annular ring 20, the inner wall of the inner cavity 17 and the outer surface of the pressure tube 19 are threadedly connected, the inner wall of the pressure tube 19 and the outer surface of the annular ring 20 are sealed, the inner wall and bottom surface of the annular ring 20 are sealed with the inner bottom surface and side wall of the inner cavity 17, and a plurality of side holes 6 are equidistantly provided between the inner walls of the paint brush sleeve body 1 near the top edge along the circumferential direction, and the plurality of side holes 6 all correspond to and penetrate the internal top surface of the inner cavity 17, and a plurality of injection holes 11 are equidistantly provided on the inner wall of one side of the inner cavity 17 along the circumferential direction, and the plurality of injection holes 11 all penetrate the interior of the paint brush sleeve body 1.

[0032] The effect achieved is that, first, the pressure tube 19 is driven by the adjusting ring 5 to press the buffer plate 18 onto the inner top surface of the inner cavity 17, so that the molten paint can be buffered, and then the support sleeve 31 is rotated by rotating the annular ring 20 during painting, thereby driving the multiple blocks 21 on the annular ring 20 to rotate, so that the blocks 21 are separated from the injection hole 11, so that the molten paint inside the inner cavity 17 can enter the interior of the brush sleeve body 1 through the injection hole 11. When not in use, it is only necessary to rotate the annular ring 20 in the opposite direction to isolate the injection hole 11 from the inner cavity 17 through the blocks 21, thereby completing the sealing.

[0033] like Figure 3-7 As shown, an annular docking plate 2 is fixed to the top of the coating sleeve body 1, a heat-conducting sleeve 7 is provided inside the fixed sleeve 10, the inner wall of the heat-conducting sleeve 7 is fitted with the outer surface of the coating sleeve body 1, and the outer surface of the heat-conducting sleeve 7 is fixed with multiple heat-conducting plates 8 at equal distances along the circumferential direction, and one side of the multiple heat-conducting plates 8 is fitted with the inner wall of the fixed sleeve 10, and the bottom of the heat-conducting sleeve 7 and the bottom of the fixed sleeve 10 are fixed with flange connection plates 3. The outer surface of the fixed sleeve 10 is provided with multiple side openings 4 at equal distances along the circumferential direction, and the multiple side openings 4 all penetrate into the interior of the fixed sleeve 10, and the bottom of the heat-conducting sleeve 7 is provided with multiple side openings 4 at equal distances along the circumferential direction. There are multiple openings 9, and the multiple openings 9 all pass through the opposite sides of the heat conducting plate 8. The multiple blocks 21 correspond to the multiple injection holes 11. The top of the fixed sleeve 10 is provided with two positioning grooves 16. The bottom of the adjusting ring 5 is provided with a movable groove 12 near the edge of one side. A rotating shaft 13 is fixed between the inner walls on both sides of the movable groove 12. A positioning block 14 is fixed to the bottom of the rotating shaft 13. A spherical handle 15 is fixed to the outer surface of one side of the positioning block 14. The positioning block 14 is engaged with the inside of one of the positioning grooves 16. The heat conducting sleeve 7 and the fixed sleeve 10 are fixed by the flange connection plate 3.

[0034] The effect achieved is that when the annular ring 20 is rotated to control the on and off of the injection hole 11, the annular ring 20 can be fixed by the cooperation of the positioning block 14 and the positioning groove 16 to prevent the annular ring 20 from sliding during operation and causing the injection hole 11 to be closed. During installation, the adjustment ring 5 and the support sleeve 31 can be sealed by the cooperation of the sealing ring 23 and the annular groove 22. The sealing effect can be enhanced by the guide groove 24 and the guide plate 26 as well as the side groove 25 and the side plate 27. The sealing ring 23, the guide plate 26 and the side plate 27 are all made of rubber, which enhances the sealing performance of the sealing ring 23, the guide plate 26 and the side plate 27. A heat-conducting sleeve 7 and a heat-conducting plate 8 are arranged between the outer surface of the painting sleeve body 1 and the inner wall of the fixed sleeve 10, so that the paint-coated paint wire can be condensed.

[0035] The method of use and working principle of this device: when in use, the external paint needs to be clamped in the interior of the paint cover body 1 through the external pipe, and the side hole 6 inside the paint cover body 1 is separated from the injection hole 11, so that the molten paint in the external pipe enters the inner cavity 17 through the side hole 6, and then passes through the buffer plate 18 inside the inner cavity 17, and finally flows into the interior of the paint cover body 1 through the injection hole 11. When in use, the enameled wire is passed through the interior of the paint cover body 1, and a certain gap is left between the enameled wire and the inner wall of the paint cover body 1, so that The molten paint can be evenly applied to the outer surface of the enameled wire inside the coating sleeve body 1. Since the injection holes 11 are arranged equidistantly along the circumferential direction inside the coating sleeve body 1, the molten paint can be evenly spread, thereby improving the quality of the coating. When coating, the pressure tube 19 is first driven by the adjusting ring 5 to press the buffer plate 18 onto the inner top surface of the inner cavity 17, so that the molten paint can be buffered. Then, when coating, the annular ring 20 is rotated to rotate the support sleeve 31, thereby driving the annular ring 20 to move upward. The multiple blocks 21 are rotated to separate the block 21 from the injection hole 11, so that the paint in the molten state inside the inner cavity 17 can enter the interior of the brush cover body 1 through the injection hole 11. When not in use, it is only necessary to reversely rotate the annular ring 20 to isolate the injection hole 11 from the inner cavity 17 through the block 21, thereby completing the sealing. When the annular ring 20 is rotated to control the on and off of the injection hole 11, the annular ring 20 can be fixed by the cooperation of the positioning block 14 and the positioning groove 16 to prevent the annular ring 20 from sliding during work and causing the injection hole 1 1 is closed. During installation, the adjustment ring 5 and the support sleeve 31 can be sealed by the cooperation between the sealing ring 23 and the annular groove 22. The sealing effect can be enhanced by the guide groove 24 and the guide plate 26 as well as the side groove 25 and the side plate 27. The sealing ring 23, the guide plate 26 and the side plate 27 are all made of rubber, which enhances the sealing performance of the sealing ring 23, the guide plate 26 and the side plate 27. A heat-conducting sleeve 7 and a heat-conducting plate 8 are provided between the outer surface of the coating sleeve body 1 and the inner wall of the fixed sleeve 10, so that the paint-coated painted wire can be condensed.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fine enameled wire coating die, characterized in that: The invention comprises a paint brush cover body (1), wherein a plurality of support rods (30) are fixed at equal intervals along the circumferential direction at the middle portion of the outer surface of the paint brush cover body (1), a fixed cover (10) is fixed between one end of the plurality of support rods (30), a gap is left between the inner wall of the fixed cover (10) and the outer surface of the paint brush cover body (1), an annular opening (28) is provided between the top of the fixed cover (10) and the outer surface of the paint brush cover body (1), an annular pad (29) is provided inside the annular opening (28), the inner wall of the annular pad (29) is in contact with the outer surface of the paint brush cover body (1), and an inner cavity (17) is provided on the outer surface of the paint brush cover body (1); A support sleeve (31) is fixed to the top of the annular gasket (29) near the edge of the inner wall, and the support sleeve (31) penetrates into the inner cavity (17). An annular ring (20) is provided on the top of the support sleeve (31), and the annular ring (20) is located inside the inner cavity (17). A plurality of stoppers (21) are fixed to the top of the annular ring (20) at equal intervals along the circumferential direction. A sealing ring (23) is fixed to the middle portion of the outer surface of the support sleeve (31). An adjusting ring (5) is provided inside the annular opening (28). The bottom of the adjusting ring (5) fits with the top of the annular gasket (29). An annular groove (22) is provided on the inner wall of the adjusting ring (5) at the middle portion. The sealing ring (23) is located inside the annular groove (22). A guide groove (24) is provided between the inner walls of the adjusting ring (5) near the top edge, and a side groove (25) is provided on the inner bottom surface of the guide groove (24) near one side edge. The guide groove (24) is internally slidably connected to a guide plate (26), one end of which extends to the inner wall of one side of the guide groove (24), and a side plate (27) is fixed to the bottom of the guide plate (26), and the side plate (27) extends to the inside of the side groove (25). A pressure tube (19) is fixed to the top of the adjusting ring (5) near the edge of the inner wall, and a buffer plate (18) is provided on the inner top surface of the inner cavity (17); the bottom of the buffer plate (18) is in contact with the top of the pressure tube (19); the inner wall of the pressure tube (19) is in contact with the outer surface of the annular ring (20), and the inner wall of the inner cavity (17) is in contact with the outer surface of the annular ring (20). It is threadedly connected to the outer surface of the pressure tube (19), the inner wall of the pressure tube (19) is sealed to the outer surface of the annular ring (20), and the inner wall and bottom surface of the annular ring (20) are sealed to the inner bottom surface and side wall of the inner cavity (17); a plurality of side holes (6) are equidistantly provided between the inner wall of the paint brush cover body (1) near the top edge along the circumferential direction, and the plurality of side holes (6) are correspondingly passed through to the inner top surface of the inner cavity (17); a plurality of injection holes (11) are equidistantly provided on the inner wall of one side of the inner cavity (17) along the circumferential direction, and the plurality of injection holes (11) are passed through to the interior of the paint brush cover body (1).

2. The fine enameled wire coating die according to claim 1, characterized in that: An annular docking plate (2) is fixed to the top of the coating sleeve body (1), a heat-conducting sleeve (7) is provided inside the fixed sleeve (10), the inner wall of the heat-conducting sleeve (7) is in contact with the outer surface of the coating sleeve body (1), and a plurality of heat-conducting plates (8) are fixed to the outer surface of the heat-conducting sleeve (7) at equal intervals along the circumferential direction.

3. The fine enameled wire coating die according to claim 2, characterized in that: One side of the plurality of heat-conducting plates (8) is in contact with the inner wall of the fixed sleeve (10); the bottom of the heat-conducting sleeve (7) and the bottom of the fixed sleeve (10) are both fixed with flange connection plates (3); the outer surface of the fixed sleeve (10) is provided with a plurality of side openings (4) at equal intervals along the circumferential direction; the plurality of side openings (4) are passed through the interior of the fixed sleeve (10); the bottom of the heat-conducting sleeve (7) is provided with a plurality of openings (9) at equal intervals along the circumferential direction; the plurality of openings (9) are passed through between opposite sides of the heat-conducting plates (8).

4. The fine enameled wire coating die according to claim 3, characterized in that: The plurality of stoppers (21) correspond to the plurality of injection holes (11), the top of the fixed sleeve (10) is provided with two positioning grooves (16), the bottom of the adjustment ring (5) is provided with a movable groove (12) near one side edge, a rotating shaft (13) is fixed between the inner walls on both sides of the movable groove (12), and a positioning block (14) is fixed to the bottom of the rotating shaft (13).

5. The fine enameled wire coating die according to claim 4, characterized in that: A spherical handle (15) is fixed to the outer surface of one side of the positioning block (14), and the positioning block (14) is engaged in the interior of one of the positioning grooves (16). The heat-conducting sleeve (7) and the fixed sleeve (10) are fixed via a flange connection plate (3).

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