Extrusion die special for silicon carbide roller bar blank

Abstract

The utility model discloses a special extrusion die for a silicon carbide roller bar blank, which comprises a die body, an inlet end of the die body is connected with an extruder, the rear side of the die body is provided with a die cavity, a frame is slidably connected in the die cavity, a plurality of equidistantly distributed die cores are slidably connected in the frame, the top surface of the die body is provided with a limiting piece, and the limiting piece slidably penetrates through the die cavity. A plurality of positioning grooves are formed in the top face of the frame, the limiting pieces are inserted into the positioning grooves, and two first handles are symmetrically fixed to the outer portion of the frame. When the mold body is damaged, only the mold core needs to be replaced, the whole mold does not need to be replaced, the cost is saved, the convenience and efficiency of mold maintenance are improved, meanwhile, the replacement efficiency of the mold core in the mold is improved, the time for shutdown and waiting of the mold is shortened, and the production efficiency is improved. And the production efficiency of the mold body is further improved.

Description

Technical Field

[0001] This utility model relates to the field of silicon carbide roller production technology, and in particular to a special extrusion die for silicon carbide roller blanks. Background Technology

[0002] Silicon carbide rollers are high-performance ceramic products made primarily of silicon carbide, widely used in high-temperature industrial manufacturing equipment. Material properties include: High temperature resistance: capable of long-term operation in environments above 1600℃, with short-term tolerance up to 1800℃; Excellent thermal shock stability: strong resistance to thermal shock, able to withstand rapid temperature changes without cracking; High strength and wear resistance: high hardness, wear-resistant, suitable for high mechanical load scenarios; Chemical inertness: resistant to acid and alkali corrosion, oxidation-resistant, suitable for corrosive atmospheres; Good thermal conductivity: high thermal conductivity, excellent thermal efficiency.

[0003] Its manufacturing process primarily uses α-SiC, with the addition of binders (such as clay, oxides, or reactive sintering aids). Rod-shaped blanks are formed through extrusion, isostatic pressing, or slip casting, and then sintered at high temperatures (typically above 2200℃) to form a dense structure. Main applications include: ceramic kilns: supporting ceramic tiles, bathroom fixtures, and other products in roller kilns, withstanding high temperatures and loads; glass industry: conveyor rollers in annealing and tempering furnaces, resistant to molten glass corrosion; metallurgical industry: workpiece conveying in heat treatment furnaces, resistant to metal vapor oxidation; and new energy: a key component in photovoltaic silicon wafer sintering furnaces.

[0004] Most manufacturers use extrusion molding to produce silicon carbide rollers, and the molds are generally made of carbon steel, which has poor wear resistance and a short service life. After prolonged use, the surface of the produced products becomes rough, requiring a lot of time and labor to repair and necessitating the replacement of the entire mold. This not only increases production costs but also reduces production efficiency. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a special extrusion die for silicon carbide roller blanks.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a special extrusion die for silicon carbide roller blanks, comprising a die body, an inlet end of the die body connected to an extruder, a die cavity provided on the rear side of the die body, a frame slidably connected inside the die cavity, a plurality of equidistant die cores slidably connected inside the frame, a limiting member provided on the top surface of the die body, the limiting member slidably penetrating through the die cavity and inserted into the frame, a plurality of positioning grooves provided on the top surface of the frame, the limiting member being inserted into the positioning grooves, and two first handles symmetrically fixed on the outside of the frame.

[0007] As a further description of the above technical solution: the frame is provided with multiple dustproof plates on its exterior, and a second handle is fixed to the top surface of each dustproof plate. A positioning block is vertically fixed to the top wall of the dustproof plate, and the positioning block is inserted into the positioning groove.

[0008] As a further description of the above technical solution: the limiting member includes a countersunk hole penetrating the top wall of the mold cavity, a connecting rod slidingly passing through the countersunk hole, a pull block fixedly connected to the top surface of the connecting rod, the pull block abutting against the top surface of the mold body, a positioning pin fixedly connected to the bottom surface of the connecting rod, the positioning pin being inserted into the positioning groove at the corresponding position, and a spring sleeved on the outer edge of the connecting rod.

[0009] As a further description of the above technical solution: two support plates are symmetrically fixed to the bottom surface of the frame, and two guide rods are symmetrically fixed between the two support plates, with the two guide rods sliding through the mold body.

[0010] As a further description of the above technical solution: the bottom wall of the frame is provided with multiple guide grooves, each guide groove is slidably connected to a guide block, and the bottom surface of each mold core is fixed with a guide block.

[0011] As a further description of the above technical solution: each of the mold cores is provided with a guide groove on its upper side, and a dustproof plate is respectively snapped onto the outside of each of the mold cores located outside the mold cavity.

[0012] As a further description of the above technical solution: an installation plate is fixedly sleeved on the outer edge of the output end of the extruder, and a through hole is passed through the outside of the installation plate. A stud is slidably sleeved in each of the through holes. The stud is horizontally fixed on the outside of the mold body. A nut is threaded onto the outer edge of each stud. The nut abuts against the outside of the installation plate. The inlet end of the mold body is provided with a flared mouth that communicates with the inside of the mold core. The output port of the extruder abuts against the flared mouth.

[0013] This utility model has the following beneficial effects:

[0014] Compared with existing technologies, this special extrusion die for silicon carbide roller blanks features a die cavity within the die body, a slidingly connected frame within the die cavity, multiple die cores slidingly connected within the frame, and a limiting component within the die body to position the frame. This allows for the replacement of only the die cores when the die body is damaged, eliminating the need to replace the entire die, thus saving costs, improving the convenience and efficiency of die maintenance, increasing the efficiency of die core replacement, reducing die downtime, and ultimately improving the production efficiency of the die body. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the overall structure of the extrusion die body for silicon carbide roller blank proposed in this utility model;

[0016] Figure 2 This is a rear view of the overall structure of the extrusion die body for silicon carbide roller preform proposed in this utility model;

[0017] Figure 3 This is a main sectional view of the overall structure of the extrusion die body for silicon carbide roller blank proposed in this utility model;

[0018] Figure 4 This is a side sectional view of the overall structure of the extrusion die body for silicon carbide roller blank proposed in this utility model;

[0019] Figure 5 This utility model proposes a special extrusion die body for silicon carbide roller preform. Figure 3 Enlarged view of the structure at point A in the middle.

[0020] Legend:

[0021] 1. Extruder; 2. Mounting plate; 3. Mold body; 4. Guide rod; 5. Dustproof plate; 6. Support plate; 7. First handle; 8. Frame; 9. Second handle; 10. Pull block; 11. Mold cavity; 12. Mold core; 13. Guide groove; 14. Guide block; 15. Trumpet mouth; 16. Positioning block; 17. Positioning groove; 18. Positioning pin; 19. Countersunk hole; 20. Spring; 21. Connecting rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1 to 5This utility model provides a special extrusion die for silicon carbide roller blanks: It includes a die body 3, with the inlet end of the die body 3 connected to an extruder 1. A die cavity 11 is provided on the rear side of the die body 3. A frame 8 is slidably connected inside the die cavity 11. Two support plates 6 are symmetrically fixed to the bottom surface of the frame 8, and two guide rods 4 are symmetrically fixed between the two support plates 6. The two guide rods 4 slide through the die body 3. Multiple equidistant die cores 12 are slidably connected inside the frame 8. A limiting member is provided on the top surface of the die body 3, sliding through the die cavity 11 and inserting into the frame 8. Multiple positioning grooves 17 are provided on the top surface of the frame 8, into which the limiting member inserts. Inside the positioning groove 17, two first handles 7 are symmetrically fixed to the outside of the frame 8. Multiple dustproof plates 5 are provided on the outside of the frame 8. A second handle 9 is fixed to the top surface of each dustproof plate 5. A positioning block 16 is vertically fixed to the top wall of the dustproof plate 5. The positioning block 16 is inserted into the positioning groove 17. Multiple guide grooves 13 are provided on the bottom wall of the frame 8. A guide block 14 is slidably connected in each guide groove 13. A guide block 14 is fixed to the bottom surface of each mold core 12. A guide groove 13 is provided above each mold core 12. A dustproof plate 5 is snapped onto the outside of each mold core 12 located outside the mold cavity 11.

[0024] The limiting component includes a countersunk hole 19 that penetrates the top wall of the mold cavity 11, a connecting rod 21 that slides through the countersunk hole 19, a pull block 10 that is fixedly connected to the top surface of the connecting rod 21, the pull block 10 abutting against the top surface of the mold body 3, a positioning pin 18 that is fixedly connected to the bottom surface of the connecting rod 21, the positioning pin 18 being inserted into the positioning groove 17 at the corresponding position, and a spring 20 that is sleeved on the outer edge of the connecting rod 21.

[0025] An installation plate 2 is fixedly sleeved on the outer edge of the output end of the extruder 1. The outer side of the installation plate 2 has a through hole. A stud is slidably sleeved in each hole. The stud is horizontally fixed on the outer side of the mold body 3. A nut is threaded on the outer edge of each stud. The nut abuts against the outer side of the installation plate 2. The inlet end of the mold body 3 is provided with a flared mouth 15 that communicates with the inside of the mold core 12. The output port of the extruder 1 abuts against the inside of the flared mouth 15.

[0026] By setting a mold cavity 11 inside the mold body 3, slidingly connecting a frame 8 inside the mold cavity 11, slidingly connecting multiple mold cores 12 inside the frame 8, and setting a limiting component in the mold body 3 to position the frame 8, when the mold body 3 is damaged, only the mold cores 12 need to be replaced, without replacing the entire mold. This saves costs, improves the convenience and efficiency of mold maintenance, and also improves the replacement efficiency of the mold cores 12 inside the mold, reduces the downtime of the mold, and thus improves the production efficiency of the mold body 3.

[0027] Working principle: When the mold core 12 needs to be replaced, first remove the dustproof plate 5 outside the mold core 12 to be installed in the mold cavity 11. Then pull the pull block 10 upwards. The pull block 10 pulls the positioning pin 18 out of the positioning groove 17 on the top surface of the mold core 12 in the mold cavity 11 through the connecting rod 21. At the same time, the spring 20 is compressed. Then push the frame 8 into the mold cavity 11 from left to right. The frame 8 drives the new mold core 12 to move into the mold cavity 11. During the movement, release the pull block 10 so that the bottom surface of the positioning pin 18 abuts against the top surface of the frame 8. At the same time, the spring 20 is in a compressed state. When the new mold core 12 enters the mold cavity 11, the corresponding positioning groove 17 on its upper part will move directly below the positioning pin 18. At this time, the compressed spring 20 resets. When the spring 20 resets, it pushes the positioning pin 18 into the corresponding groove. The old mold core 12 will leave the mold cavity 11 and move to the right side of the mold body 3. Then the old mold core 12 will be removed from the right side of the frame 8 for repair. After the repair is completed, it will be installed back into the frame 8 through the guide block 14 and guide groove 13. Then the dustproof plate 5 will be installed on the frame 8. During installation, the positioning block 16 on the top wall of the dustproof plate 5 will be inserted into the positioning groove 17 above the corresponding mold core 12. When the mold core 12 on the left side of the frame 8 is used up and needs to be replaced, the frame 8 will be pushed from right to left. The repaired mold core 12 on the right side of the frame 8 will be pushed into the mold cavity 11. The damaged mold core 12 in the mold cavity 11 will be moved to the left side of the mold body 3. Then the mold core 12 that has been replaced in the left side of the frame 8 will be repaired and then installed back into the frame 8. The operation will be repeated in sequence.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An extrusion die for silicon carbide roller blank speciality, comprising a die body (3), characterised in that: The inlet end of the mold body (3) is connected to the extruder (1). The rear side of the mold body (3) is provided with a mold cavity (11). The mold cavity (11) is slidably connected to a frame (8). The frame (8) is slidably connected to multiple equally spaced mold cores (12). The top surface of the mold body (3) is provided with a limiting member. The limiting member slides through the mold cavity (11) and is inserted into the frame (8). The top surface of the frame (8) is provided with multiple positioning grooves (17). The limiting member is inserted into the positioning grooves (17). Two first handles (7) are symmetrically fixed on the outside of the frame (8).

2. A special extrusion die for SiC roller compact billets as claimed in claim 1, wherein: The frame (8) is provided with multiple dustproof plates (5) on the outside. A second handle (9) is fixed on the top surface of each dustproof plate (5). A positioning block (16) is vertically fixed on the top wall of the dustproof plate (5). The positioning block (16) is inserted into the positioning groove (17).

3. The extrusion die for silicon carbide roller preform according to claim 1, characterized in that: The limiting component includes a countersunk hole (19) penetrating the top wall of the mold cavity (11), a connecting rod (21) slidingly passing through the countersunk hole (19), a pull block (10) fixedly connected to the top surface of the connecting rod (21), the pull block (10) abutting against the top surface of the mold body (3), a positioning pin (18) fixedly connected to the bottom surface of the connecting rod (21), the positioning pin (18) being inserted into the positioning groove (17) at the corresponding position, and a spring (20) sleeved on the outer edge of the connecting rod (21).

4. A special extrusion die for SiC roller compact billets as claimed in claim 1, wherein: Two support plates (6) are symmetrically fixed to the bottom surface of the frame (8), and two guide rods (4) are symmetrically fixed between the two support plates (6). The two guide rods (4) slide through the mold body (3).

5. A special extrusion die for SiC roll blank according to claim 1, characterized in that: The bottom wall of the frame (8) is provided with a plurality of guide grooves (13), and a guide block (14) is slidably connected in each guide groove (13), and a guide block (14) is fixed on the bottom surface of each mold core (12).

6. A special extrusion die for SiC roller compact bodies according to claim 5, characterized in that: Each of the mold cores (12) is provided with a guide groove (13) above it, and a dustproof plate (5) is snapped onto the outside of each of the mold cores (12) located outside the mold cavity (11).

7. A special extrusion die for SiC roller compact bodies according to claim 1, characterized in that: An installation plate (2) is fixedly sleeved on the outer edge of the output end of the extruder (1). The outer side of the installation plate (2) has a through hole. A stud is slidably sleeved in each hole. The stud is horizontally fixed on the outer side of the mold body (3). A nut is threaded on the outer edge of each stud. The nut abuts against the outer side of the installation plate (2). The inlet end of the mold body (3) is provided with a flared mouth (15) that communicates with the inside of the mold core (12). The output port of the extruder (1) abuts against the flared mouth (15).

Images