A raw material heating device for silicon carbide production and processing

Abstract

The invention relates to the technical field of silicon carbide production, and discloses a raw material heating device for silicon carbide production and processing, comprising a sintering furnace body and a driving tube, wherein the driving tube is arranged to penetrate the sintering furnace body, and both ends of the sintering furnace body are provided with feeding ports, a feeding mechanism is fixed on the circumference of the driving tube, and the driving tube drives the feeding mechanism to enter and exit the sintering furnace body by moving left and right, and a heating chamber for heating treatment is arranged inside the sintering furnace body; the feeding mechanism comprises two groups of rings fixed on the driving tube; in the technical scheme, when the feeding mechanism feeds a processing mold filled with silicon carbide raw material into the sintering furnace body, the processing mold can be expanded so that the processing mold can approach the inner wall of the heating chamber, thereby making the processing mold closer to a heating source, thereby improving the heating effect.

Description

Technical Field

[0001] The invention relates to the technical field of silicon carbide production, and in particular to a raw material heating device used for silicon carbide production and processing. Background Art

[0002] Silicon carbide is an inorganic substance with the chemical formula SiC. It is made of quartz sand, petroleum coke (or coal coke), sawdust (salt is needed to produce green silicon carbide) and other raw materials through high-temperature smelting. Resistance furnaces and sintering furnaces can generally be used for high-temperature smelting. When using a sintering furnace to sinter the silicon carbide raw materials, the silicon carbide raw materials are generally filled into the processing mold, and then the processing mold is sent into the sintering furnace for heating and sintering.

[0003] However, in order to prevent heat loss, the sintering furnace is generally designed with smaller inlet and outlet ports and a larger furnace body, so that the raw materials enter the sintering furnace through a smaller feed port. With the above design, if you want to allow the processing mold to enter the sintering furnace, the maximum aperture at the processing mold should be smaller than the aperture of the feed port at the beginning, so that it can enter the sintering furnace. Therefore, multiple groups of processing molds are gathered together to reduce the occupied space. After the processing molds enter the sintering furnace, the multiple groups of processing molds are gathered together, so that the air circulation between the multiple groups of processing molds is poor, which affects the hot air to stay on the side where the processing molds are gathered together. In addition, the multiple groups of processing molds are gathered together, which makes the distance from the heating source inside the sintering furnace farther, thereby reducing the heating efficiency and affecting the sintering effect. Summary of the invention

[0004] The present invention provides a raw material heating device for silicon carbide production and processing. A processing mold is fed into a sintering furnace body through a feeding mechanism. The processing mold is contracted and expanded so that after entering the sintering furnace body, the periphery of multiple groups of processing molds can be expanded. This not only facilitates air circulation, but also reduces the distance between the processing mold and a heating source on the inner wall of a heating chamber. This solves the problem mentioned in the above background technology that due to the mutual aggregation of multiple groups of processing molds, the air circulation between the multiple groups of processing molds is poor, which affects the hot air to stay on the side where the processing molds are mutually aggregated, and the multiple groups of processing molds are aggregated so that the distance from the heating source inside the sintering furnace is far, thereby reducing the heating efficiency and affecting the sintering effect.

[0005] The present invention provides the following technical solution: a raw material heating device for silicon carbide production and processing, comprising a sintering furnace body and a driving pipe, wherein the driving pipe is arranged to penetrate the sintering furnace body, and both ends of the sintering furnace body are provided with feeding ports, and a feeding mechanism is fixed on the circumference of the driving pipe, and the driving pipe drives the feeding mechanism to enter and exit the sintering furnace body by moving left and right, and a heating chamber for heating treatment is arranged inside the sintering furnace body;

[0006] The feeding mechanism includes two groups of rings fixed on the driving tube, and a plurality of expansion blocks are arranged on the two groups of rings. A processing mold for filling silicon carbide raw materials is installed on the expansion blocks. A protrusion is fixed on the plurality of expansion blocks, and a slider is fixed on the end of the protrusion away from the feed port. A track groove for sliding the slider is provided between the sintering furnace body and the feed port, and the expansion block completes the outward expansion action by sliding the slider in the track groove.

[0007] As an optional solution of the raw material heating device for silicon carbide production and processing described in the present invention, a guide rod is fixed to the outer surface of the ring, a guide groove for the guide rod to slide is provided inside the expansion block, a limiting block is fixed to the end of the guide rod, a limiting groove for the limit block to slide is provided inside the expansion block, and a first spring is fixed between the limit block and the inner wall of the limiting groove.

[0008] As an optional solution of the raw material heating device for silicon carbide production and processing described in the present invention, the track groove includes a horizontal portion, a rising portion and a wavy portion which are connected in sequence.

[0009] As an optional solution of the raw material heating device for silicon carbide production and processing described in the present invention, a pressure ring is slidably sleeved on the driving tube, a slide plate is slidably connected to the pressure ring, a push rod is fixed to the end of the slide plate, a hot press plate is fixed to the end of the push rod, a slideway for the hot press plate to slide is provided in the expansion block, and the pressure ring slides on the driving tube to enable the hot press plate to compact the silicon carbide raw material inside the processing mold.

[0010] As an optional solution of the raw material heating device for silicon carbide production and processing described in the present invention, a connecting rod is fixed to the surface of the protrusion, a movable groove for the connecting rod to move is provided inside the pressure ring, a cross bar is fixed to the end of the connecting rod, a sliding protrusion is fixed to the end of the cross bar, and an inclined groove that interferes with the sliding protrusion is provided on the inner wall of the movable groove.

[0011] As an optional solution of the raw material heating device for silicon carbide production and processing described in the present invention, the push rod includes a fixed rod fixed to the slide plate and a piston rod fixed to the hot press plate, a spring groove is opened inside the fixed rod, a second spring is arranged inside the spring groove, and the end of the piston rod is slidably arranged in the spring groove.

[0012] As an optional scheme of the raw material heating device for silicon carbide production and processing described in the present invention, a first rotating groove is provided inside the sleeve ring, a first sprocket is rotatably arranged in the first rotating groove, a first rotating shaft is fixed on the first sprocket, a plug is fixed on the inner surface of the pressure ring for driving the first rotating shaft to rotate, a second rotating groove is provided in the expansion block, a second rotating shaft is rotatably arranged in the second rotating groove, a second sprocket and a first gear are connected to the second rotating shaft, a chain is connected to the second sprocket and the first sprocket for transmission, and a second gear for meshing with the first gear is fixed on the processing mold.

[0013] As an optional solution of the raw material heating device for silicon carbide production and processing described in the present invention, a receiving groove is provided inside the column, the end of the first rotating shaft is slidably arranged in the receiving groove, a rotating block is fixed to the end of the first rotating shaft, and a threaded groove for the rotating block to slide is provided on the inner wall of the column, and the rotating block drives the first rotating shaft to rotate by sliding in the threaded groove.

[0014] As an optional solution of the raw material heating device for silicon carbide production and processing described in the present invention, a receiving groove for the chain to rotate is opened inside the ring, a positioning seat is fixed in the receiving groove, and a tensioner for tensioning the chain is fixed on the positioning seat.

[0015] As an optional solution of the raw material heating device for silicon carbide production and processing described in the present invention, the feeding mechanism is provided with two groups at both ends of the sintering furnace body, and the expansion block is provided with a mounting groove for inserting the processing mold, and the expansion block is provided with a cover plate for limiting the processing mold inside the mounting groove, and the cover plate is detachably connected to the expansion block by bolts.

[0016] The present invention has the following beneficial effects:

[0017] 1. In the raw material heating device for silicon carbide production and processing, the feeding mechanism is driven to move by a driving pipe, and the feeding mechanism feeds multiple groups of processing molds filled with silicon carbide raw materials into the sintering furnace body. First, the multiple groups of processing molds are in a state of being close to each other, and can conveniently enter the sintering furnace from the feed port. Then, after the feeding mechanism enters the feed port, the slider slides inside the track groove, which can drive the expansion block to expand outward, so that the multiple groups of processing molds expand outward. After the multiple groups of processing molds expand outward, not only can the air circulation between the multiple groups of processing molds be facilitated, but also the distance between the processing molds and the heating source inside the heating chamber can be reduced, thereby improving the heating efficiency of the processing molds and improving the sintering effect.

[0018] 2. In the raw material heating device for silicon carbide production and processing, when the processing mold expands outward, the connecting rod drives the pressure ring to move, so that the pressure ring drives the push rod to move, and the push rod drives the hot pressing plate to move, so that the hot pressing plate moves to the inside of the processing mold, and the hot pressing plate is used to compact the silicon carbide raw material inside the processing mold, thereby increasing the stability of the silicon carbide raw material inside the processing mold when it expands outward, making the contact between the raw materials closer, facilitating the diffusion and flow of the silicon carbide raw material during sintering, thereby facilitating the rearrangement and densification of the silicon carbide raw material during sintering, and further improving the sintering effect.

[0019] 3. In the raw material heating device for silicon carbide production and processing, when the pressure ring moves, the pressure ring drives the plug column to move, and the movement of the plug column drives the first rotating shaft to move in the receiving groove, so that the first rotating shaft drives the rotating block to slide in the thread groove, and the rotating block slides inside the thread groove, which can drive the first rotating shaft to rotate, and the rotation of the first rotating shaft drives the first sprocket to rotate, and the first sprocket drives the processing mold to rotate through the chain, the second sprocket, the first gear, the second rotating shaft and the second gear. Therefore, when the processing mold is heated, the heating surface of the processing mold facing the heating source is changed through the self-rotation of the processing mold, thereby increasing the uniformity of heating of the processing mold, which is beneficial to improving the sintering effect of silicon carbide raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 For the present invention Figure 1 Schematic diagram of the three-dimensional structure of the feeding mechanism at the middle feed inlet.

[0022] Figure 3 For the present invention Figure 1 Cross-sectional view of the feeding mechanism moving into the sintering furnace body.

[0023] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle.

[0024] Figure 5 This is one of the cross-sectional views of the cross-sectional structure of the expansion block of the present invention.

[0025] Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle.

[0026] Figure 7 It is a schematic diagram of the cross-sectional structure of the connection between the slider and the track groove in the present invention.

[0027] Figure 8 For the present invention Figure 2 Schematic diagram of the three-dimensional structure of the expansion block part on the left side.

[0028] Fig. 9 For the present invention Figure 8 One of the structural cross-section views of the part.

[0029] Fig.10 For the present invention Fig. 9 Enlarged view of center C.

[0030] Fig.11 For the present invention Figure 8 Partial structural cross-sectional view 2.

[0031] Fig.12 For the present invention Fig.11 Enlarged view of point D in the middle.

[0032] Fig.13 This is the second cross-sectional view of the cross-sectional structure of the expansion block of the present invention.

[0033] Fig.14 For the present invention Fig.13 Enlarged view of point E in the middle;

[0034] Fig.15 For the present invention Fig.13 Enlarged view of point F in the middle.

[0035] In the figure: 1, sintering furnace body; 2, driving pipe; 3, feeding port; 4, heating chamber; 5, sleeve ring; 6, expansion block; 7, processing mold; 8, bump; 9, slider; 10, track groove; 101, horizontal part; 102, rising part; 103, wave part; 11, guide rod; 12, guide groove; 13, limit block; 14, limit groove; 15, first spring; 16, pressure ring; 17, slide plate; 18, push rod; 19, hot pressing plate; 20, slideway; 21, connecting rod; 22, movable groove; 23, cross bar; 2 4. Sliding protrusion; 25. Inclined groove; 26. Fixed rod; 27. Piston rod; 28. Spring groove; 29. ​​Second spring; 30. First rotating groove; 31. First sprocket; 32. First rotating shaft; 33. Insert column; 34. Second rotating groove; 35. Second rotating shaft; 36. Second sprocket; 37. First gear; 38. Chain; 39. Second gear; 40. Receiving groove; 41. Rotating block; 42. Threaded groove; 43. Accommodating groove; 44. Positioning seat; 45. Tensioner; 46. Mounting groove; 47. Cover plate. DETAILED DESCRIPTION

[0036] 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.

[0037] For example, see Figure 1-Figure 15 A raw material heating device for silicon carbide production and processing includes a sintering furnace body 1 and a driving tube 2. The driving tube 2 runs through the sintering furnace body 1. Both ends of the sintering furnace body 1 are provided with feeding ports 3. A feeding mechanism is fixed on the circumference of the driving tube 2. The driving tube 2 drives the feeding mechanism to enter and exit the sintering furnace body 1 by moving left and right. A heating chamber 4 for heating treatment is provided inside the sintering furnace body 1;

[0038] The feeding mechanism includes two sets of collars 5 fixed on the driving tube 2, and a plurality of expansion blocks 6 are arranged on the two sets of collars 5. A processing mold 7 for filling silicon carbide raw materials is installed on the expansion blocks 6. A convex block 8 is fixed on each of the expansion blocks 6. A slider 9 is fixed on the end of the convex block 8 away from the feed port 3. A track groove 10 for the slider 9 to slide is provided between the sintering furnace body 1 and the feed port 3. The expansion block 6 completes the outward expansion action by sliding in the track groove 10 through the slider 9;

[0039] A guide rod 11 is fixed on the outer surface of the collar 5, a guide groove 12 is provided inside the expansion block 6 for the guide rod 11 to slide, a limit block 13 is fixed at the end of the guide rod 11, a limit groove 14 is provided inside the expansion block 6 for the limit block 13 to slide, and a first spring 15 is fixed between the limit block 13 and the inner wall of the limit groove 14;

[0040] The track groove 10 includes a horizontal portion 101, a rising portion 102 and a wave portion 103 which are connected in sequence;

[0041] Two groups of feeding mechanisms are arranged at both ends of the sintering furnace body 1, and the expansion block 6 is provided with a mounting groove 46 for inserting the processing mold 7. The expansion block 6 is provided with a cover plate 47 for limiting the processing mold 7 inside the mounting groove 46. The cover plate 47 is detachably connected to the expansion block 6 by bolts.

[0042] In the present technical solution, the end of the driving tube 2 is connected to a power device that can move the driving tube 2 to the left and to the right. The power device is a prior art. As long as it can move the driving tube 2 to the left and to the right, it is not an innovative point of the present invention and will not be described in detail. When working, the processing mold 7 filled with silicon carbide raw material is first installed on the expansion blocks 6 on both sides, and the cover plate 47 is covered and fixed to the expansion block 6 by bolts to limit the processing mold 7 to prevent the processing mold 7 from falling off. After the processing mold 7 is installed, the power device is started to drive the driving tube 2 to move to the right, and the driving tube 2 drives the feeding mechanism to move to the right as a whole, enters the sintering furnace body 1 from the feed port 3, and is heated by the heating chamber 4 to heat and sinter the silicon carbide raw material inside the processing mold 7 (such as Figure 3(as shown) during sintering, the feeding mechanism on the right is loaded and the processing mold 7 is installed on the feeding mechanism on the right. After the processing mold 7 on the left is sintered, the driving tube 2 is moved to the left to move the feeding mechanism on the left out of the feeding port 3 on the left. At this time, the feeding mechanism on the right enters the sintering furnace body 1 for heating and sintering. At this time, the processing mold 7 on the left that has been sintered can be removed from the feeding mechanism on the left and replaced with a new processing mold 7 that needs to be sintered. After waiting for the processing mold 7 on the right to be sintered, the driving tube 2 is moved to the right to move the feeding mechanism on the right out of the feeding port 3 on the right, and the processing mold 7 on the left is sintered again. Through the above process, the sintering work can be circulated, thereby improving work efficiency.

[0043] When the feeding mechanism enters the sintering furnace body 1, the driving tube 2 first moves to the right to drive the feeding mechanism to move to the right. Figure 3 As shown in the figure, when the feeding mechanism enters the feed port 3, the slider 9 enters the track groove 10 and slides along the track groove 10. The slider 9 first slides along the horizontal portion 101 of the track groove 10 and enters the feed port 3. When the slider 9 slides along the rising portion 102 of the track groove 10, the slider 9 pulls the expansion block 6 to move, so that the expansion block 6 expands toward the inner wall direction of the heating chamber 4. When the expansion block 6 expands outward, the guide rod 11 slides in the guide groove 12, driving the limit block 13 to slide inside the limit groove 14, so that the first spring 15 is compressed and the first spring 15 accumulates force. When the slider 9 slides to the top of the rising portion 102, the expansion block 6 expands to the maximum position. When the expansion block 6 expands, the multiple groups of gathered processing molds 7 are also expanded, so that the processing mold 7 is closer to the heating source of the inner wall of the heating chamber 4, thereby increasing the heating effect. At the same time, the processing mold 7 expands outward, increasing the air circulation between the inner sides of the multiple groups of processing molds 7, so that the processing mold 7 is heated on the side away from the heating source.

[0044] When the feeding mechanism moves out along the feed port 3, the slider 9 slides from the top of the rising portion 102 to the bottom, and at the same time the first spring 15 releases force, so that the multiple groups of processing molds 7 move closer to each other to discharge the materials; the first spring 15 is initially in a compressed state, so that the first spring 15 can pull the expansion block 6 toward the ring 5, so that when the slider 9 does not slide in the track groove 10, the expansion block 6 will not separate from the ring 5.

[0045] In the second embodiment, when the processing mold 7 expands outward with the expansion block 6, the silicon carbide raw material inside the processing mold 7 is not stable enough. The silicon carbide raw material is not stable enough, which easily leads to insufficient contact between the raw materials, affecting the diffusion and flow process of the raw materials during sintering, thereby affecting the rearrangement and densification of the raw materials during sintering. In view of this problem, this embodiment is an improvement made on the basis of the first embodiment. For details, please refer to Figure 1-Figure 15A pressing ring 16 is slidably sleeved on the driving tube 2, a slide plate 17 is slidably connected to the pressing ring 16, a push rod 18 is fixed to the end of the slide plate 17, a hot pressing plate 19 is fixed to the end of the push rod 18, a slideway 20 for the hot pressing plate 19 to slide is provided in the expansion block 6, and the pressing ring 16 slides on the driving tube 2 so that the hot pressing plate 19 compacts the silicon carbide raw material inside the processing mold 7;

[0046] A connecting rod 21 is fixed on the surface of the protrusion 8, a movable groove 22 for the connecting rod 21 to move is provided inside the pressure ring 16, a cross bar 23 is fixed at the end of the connecting rod 21, a sliding protrusion 24 is fixed at the end of the cross bar 23, and an inclined groove 25 that contacts the sliding protrusion 24 is provided on the inner wall of the movable groove 22;

[0047] The push rod 18 includes a fixed rod 26 fixed to the slide plate 17 and a piston rod 27 fixed to the hot pressing plate 19. A spring groove 28 is provided inside the fixed rod 26. A second spring 29 is provided inside the spring groove 28. The end of the piston rod 27 is slidably arranged in the spring groove 28.

[0048] In the present technical solution, when the slider 9 slides along the rising portion 102 of the track groove 10, the push rod 18 moves with the expansion block 6, so that the push rod 18 drives the slide plate 17 to slide inside the pressure ring 16, and the slide plate 17 will not slide out of the pressure ring 16. At the same time, the connecting rod 21 moves with the protrusion 8 (such as Fig. 9 As shown in the figure, when the connecting rod 21 moves upward, the connecting rod 21 drives the cross bar 23 and the sliding protrusion 24 to move upward, and the sliding protrusion 24 slides along the inclined groove 25, so that the pressure ring 16 moves to the right, and the pressure ring 16 moves to the right, driving the slide plate 17 to move to the right, and the slide plate 17 pushes the hot pressing plate 19 to move to the right through the push rod 18, and the hot pressing plate 19 moves to the right, so that the hot pressing plate 19 enters the processing mold 7 to compact the silicon carbide raw material and increase the stability of the silicon carbide raw material; when the expansion block 6 is reset, the expansion block 6 drives the push rod 18 to move, and the push rod 18 drives the slide plate 17 to slide into the pressure ring 16, so that the slide plate 17 is reset, and at the same time, the connecting rod 21 moves downward with the protrusion 8, and the connecting rod 21 drives the sliding protrusion 24 to move downward, and the sliding protrusion 24 slides along the inclined groove 25, so that the pressure ring 16 moves to the left to reset, and the pressure ring 16 moves to the left to reset, and the hot pressing plate 19 is moved out of the processing mold 7, and the reset of the hot pressing plate 19 is completed;

[0049] When the slider 9 slides along the rising portion 102 of the track groove 10, first, when the slider 9 slides to half of the rising portion 102, the hot pressing plate 19 can complete the work of compacting the silicon carbide raw material inside the processing mold 7. When the slider 9 continues to slide upward along half of the rising portion 102, since the hot pressing plate 19 has compacted the silicon carbide raw material, the hot pressing plate 19 cannot continue to move. At this time, when the pressure ring 16 continues to move to the right, the second spring 29 is compressed and accumulates force, so that the piston rod 27 slides toward the inside of the fixed rod 26 until the slider 9 slides to the top of the rising portion 102; when the pressure ring 16 is reset, the second spring 29 releases force, and the pressure ring 16 first drives the fixed rod 26 to move to the left. After the second spring 29 has released force, the fixed rod 26 drives the piston rod 27 to move to the left together, so that the hot pressing plate 19 is reset.

[0050] Embodiment 3: Since the side of the processing mold 7 close to the inner wall of the heating chamber 4 remains unchanged when the processing mold 7 expands outward and sintering is performed, the heating effect of the side facing the heating chamber 4 is better, while the heating effect of the side facing away from the inner wall of the heating chamber 4 is relatively poor. To solve this problem, this embodiment is an improvement made on the basis of embodiment 2. For details, please refer to Figure 1-Figure 15 A first rotating groove 30 is provided inside the sleeve 5, a first sprocket 31 is rotatably provided in the first rotating groove 30, a first rotating shaft 32 is fixed on the first sprocket 31, a plug 33 for driving the first rotating shaft 32 to rotate is fixed on the inner surface of the pressure ring 16, a second rotating groove 34 is provided inside the expansion block 6, a second rotating shaft 35 is rotatably provided in the second rotating groove 34, a second sprocket 36 and a first gear 37 are connected to the second rotating shaft 35, a chain 38 is transmission-connected between the second sprocket 36 and the first sprocket 31, and a second gear 39 for meshing with the first gear 37 is fixed on the processing mold 7;

[0051] A receiving groove 40 is provided inside the plug post 33, and the end of the first rotating shaft 32 is slidably arranged in the receiving groove 40. A rotating block 41 is fixed to the end of the first rotating shaft 32. A thread groove 42 for the rotating block 41 to slide is provided on the inner wall of the plug post 33. The rotating block 41 drives the first rotating shaft 32 to rotate by sliding in the thread groove 42.

[0052] The ring 5 has an accommodating groove 43 for the chain 38 to rotate. A positioning seat 44 is fixed in the accommodating groove 43 . A tensioner 45 for tensioning the chain 38 is fixed on the positioning seat 44 .

[0053] In this technical solution, (such as Fig.10As shown in the figure, when the pressing ring 16 moves to the right, the pressing ring 16 drives the plug post 33 to move to the right, and the plug post 33 moves to the right, so that the first rotating shaft 32 is inserted into the receiving groove 40 of the plug post 33. When the first rotating shaft 32 is inserted into the receiving groove 40, it drives the rotating block 41 to slide along the thread groove 42. When the rotating block 41 slides along the thread groove 42, the first rotating shaft 32 rotates. The rotation of the first rotating shaft 32 drives the first sprocket 31 to rotate. The rotation of the first sprocket 31 drives the chain 38 to rotate. The chain 38 drives the second sprocket 36 to rotate. The second sprocket 36 drives the second rotating shaft The shaft 35 rotates, the second shaft 35 drives the first gear 37 to rotate, the first gear 37 drives the second gear 39 to rotate, and the second gear 39 drives the processing mold 7 to rotate; when the pressure ring 16 moves to the left and resets, the first shaft 32, the first sprocket 31, the chain 38, the second sprocket 36, the first gear 37, the second shaft 35 and the second gear 39 rotate in the opposite direction, so that the processing mold 7 also rotates in the opposite direction, so that when the expansion block 6 drives the processing mold 7 to expand and contract, the processing mold 7 can rotate on its own, thereby improving the heating effect.

[0054] In the present technical solution, when the expansion block 6 is expanded, the first gear 37 is driven to move. At this time, the first gear 37 is engaged with the chain 38, and the chain 38 is pulled to move. The tensioner 45 is provided, so that the chain 38 is always in a tensioned state, so that when the chain 38 is extended and retracted, the first sprocket 31 is not affected to drive the second sprocket 36 to rotate through the chain 38, so that when the first sprocket 31 rotates, the processing mold 7 can be driven to rotate. The tensioner 45 in the present application is a prior art, and the specific structure is not described in detail.

[0055] After the slider 9 slides to the top of the rising portion 102, it will slide along the wave portion 103. When the slider 9 slides on the wave portion 103, the expansion block 6 performs a reciprocating motion of small expansion and contraction. When the expansion block 6 performs a reciprocating motion of small expansion and contraction, it can drive the pressure ring 16 to reciprocate left and right. The pressure ring 16 reciprocates left and right, driving the processing mold 7 to rotate in the forward and reverse directions, thereby changing the side of the processing mold 7 facing the heating chamber 4, which is beneficial to improve the uniformity and sufficiency of heating and improve the sintering effect of the raw materials.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A raw material heating device for silicon carbide production and processing, comprising a sintering furnace body (1) and a drive tube (2), wherein the drive tube (2) is arranged through the sintering furnace body (1), and is characterized in that: Both ends of the sintering furnace body (1) are provided with a feed port (3), a feed mechanism is fixed on the circumference of the driving tube (2), and the driving tube (2) drives the feed mechanism to enter and exit the sintering furnace body (1) by moving left and right, and a heating chamber (4) for heating treatment is provided inside the sintering furnace body (1); The feeding mechanism comprises two groups of collars (5) fixed on the driving tube (2), and a plurality of expansion blocks (6) are arranged on the two groups of collars (5). A processing mold (7) for filling silicon carbide raw materials is installed on the expansion blocks (6), and a convex block (8) is fixed on the plurality of expansion blocks (6). A slider (9) is fixed on the end of the convex block (8) away from the feed port (3). A track groove (10) for the slider (9) to slide is provided between the sintering furnace body (1) and the feed port (3), and the expansion block (6) completes the outward expansion action by sliding in the track groove (10) through the slider (9); A pressure ring (16) is slidably sleeved on the driving tube (2), a slide plate (17) is slidably connected to the pressure ring (16), a push rod (18) is fixed to the end of the slide plate (17), a hot pressing plate (19) is fixed to the end of the push rod (18), a slideway (20) for the hot pressing plate (19) to slide is provided in the expansion block (6), and the pressure ring (16) slides on the driving tube (2) so that the hot pressing plate (19) compacts the silicon carbide raw material inside the processing mold (7); A connecting rod (21) is fixed on the surface of the protrusion (8), a movable groove (22) for the connecting rod (21) to move is provided inside the pressure ring (16), a cross bar (23) is fixed at the end of the connecting rod (21), a sliding protrusion (24) is fixed at the end of the cross bar (23), and an inclined groove (25) that contacts the sliding protrusion (24) is provided on the inner wall of the movable groove (22).

2. The raw material heating device for silicon carbide production and processing according to claim 1 is characterized in that: A guide rod (11) is fixed on the outer surface of the collar (5); a guide groove (12) is provided inside the expansion block (6) for the guide rod (11) to slide; a limit block (13) is fixed at the end of the guide rod (11); a limit groove (14) is provided inside the expansion block (6) for the limit block (13) to slide; a first spring (15) is fixed between the limit block (13) and the inner wall of the limit groove (14).

3. The raw material heating device for silicon carbide production and processing according to claim 2 is characterized in that: The track groove (10) comprises a horizontal portion (101), a rising portion (102) and a wave portion (103) which are sequentially connected and arranged.

4. The raw material heating device for silicon carbide production and processing according to claim 3 is characterized in that: The push rod (18) includes a fixing rod (26) fixed to the slide plate (17) and a piston rod (27) fixed to the hot pressing plate (19); a spring groove (28) is provided inside the fixing rod (26); a second spring (29) is provided inside the spring groove (28); and the end of the piston rod (27) is slidably arranged in the spring groove (28).

5. The raw material heating device for silicon carbide production and processing according to claim 4 is characterized in that: The sleeve ring (5) is provided with a first rotating groove (30) inside, a first sprocket (31) is rotatably arranged in the first rotating groove (30), a first rotating shaft (32) is fixed on the first sprocket (31), a plug post (33) for driving the first rotating shaft (32) to rotate is fixed on the inner surface of the pressure ring (16), a second rotating groove (34) is provided in the expansion block (6), a second rotating shaft (35) is rotatably arranged in the second rotating groove (34), a second sprocket (36) and a first gear (37) are connected to the second rotating shaft (35), a chain (38) is transmission-connected between the second sprocket (36) and the first sprocket (31), and a second gear (39) for meshing with the first gear (37) is fixed on the processing mold (7).

6. The raw material heating device for silicon carbide production and processing according to claim 5 is characterized in that: The plug post (33) is provided with a receiving groove (40) inside, the end of the first rotating shaft (32) is slidably arranged in the receiving groove (40), a rotating block (41) is fixed to the end of the first rotating shaft (32), and a thread groove (42) for the rotating block (41) to slide is provided on the inner wall of the plug post (33), and the rotating block (41) drives the first rotating shaft (32) to rotate by sliding in the thread groove (42).

7. The raw material heating device for silicon carbide production and processing according to claim 6 is characterized in that: The ring (5) is provided with a receiving groove (43) for the chain (38) to rotate, a positioning seat (44) is fixed in the receiving groove (43), and a tensioner (45) for tensioning the chain (38) is fixed on the positioning seat (44).

8. The raw material heating device for silicon carbide production and processing according to claim 7 is characterized in that: The feeding mechanism is provided in two groups at both ends of the sintering furnace body (1), and the expansion block (6) is provided with a mounting groove (46) for inserting the processing mold (7), and the expansion block (6) is provided with a cover plate (47) for limiting the processing mold (7) inside the mounting groove (46), and the cover plate (47) is detachably connected to the expansion block (6) by bolts.

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