Die for graphite crucible production

Abstract

The utility model discloses a mold for producing a graphite crucible. The mold comprises a base, a support is arranged on the base, an air cylinder is arranged on the support, the air cylinder is provided with a connecting rod, a sealing cover is rotationally arranged at the bottom of the connecting rod, and a mold core is arranged at the bottom of the sealing cover. A first gear ring is rotationally arranged on the base, a lower die sleeve is clamped to the middle position of the top of the first gear ring, and a die cavity is formed in the lower die sleeve; a second gear ring is arranged on the outer side of the sealing cover; a mounting block is arranged on the base, a driving gear is arranged on the mounting block, the driving gear is located between the first gear ring and the second gear ring, and the driving gear is in meshed connection with the first gear ring; when the mold core is located in the mold cavity for mold pressing, the second gear ring is in meshed connection with the driving gear; a motor is arranged on the mounting block, and the output end of the motor is connected with the driving gear. The first gear ring and the second gear ring coaxially and reversely rotate, so that the die core and the lower die sleeve coaxially and reversely rotate, the graphite crucible can be better separated from the die, and the graphite crucible can be conveniently taken out.

Description

Technical Field

[0001] This utility model belongs to the field of graphite crucible mold technology, and in particular relates to a mold for producing graphite crucibles. Background Technology

[0002] Graphite crucibles are special crucibles made from graphite raw materials. They have good thermal conductivity, high temperature resistance and chemical stability, and are widely used in the smelting of alloy tool steel and the melting of non-ferrous metals and their alloys. In the production process of graphite crucibles, forming molds are required for production.

[0003] Patent CN202323484707.8 discloses a stamping die for pressing graphite crucibles, comprising a frame, a die core, a lifting mechanism, half-die sleeves, and a bidirectional push-pull structure. A pair of half-die sleeves are mirror-image arranged on the inner side of the frame, forming a complete die sleeve. The two half-die sleeves are driven to move relative to each other or back to back by the bidirectional push-pull structure mounted on the frame. The die core is compatible with the die sleeves. The advantages compared to existing technologies are: In use, after the graphite crucible is pressed, the operation of the die sleeve circulating water pump and the die core circulating water pump allows for the formation of flowing cold water in the die sleeve and die core circulating water chambers, thus enabling faster cooling of the graphite crucible. By synchronously rotating two handwheels clockwise, the two half-die sleeves can be moved back to back, separating the pressed graphite crucible from the die sleeve and exposing it, making it easier for workers to remove and significantly improving the efficiency of graphite crucible pressing.

[0004] However, the above-mentioned patent has certain defects: two half mold sleeves are combined to form a complete mold sleeve. During the pressing process of the graphite crucible, a gap is likely to exist. This gap will cause a protruding edge to be generated at the corresponding position of the product, which needs to be polished later. In addition, after the above-mentioned technology is pressed, the mold core and the graphite crucible are not separated. Due to the stamping action during the production process, the two are likely to stick together and are not easy to remove. Utility Model Content

[0005] Based on the above background, the purpose of this utility model is to provide a mold for producing graphite crucibles.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A mold for producing graphite crucibles includes a base, a support on the base, a cylinder on the support, a connecting rod at the output end of the cylinder, a sealing cover rotatably mounted at the bottom of the connecting rod, a mold core at the bottom of the sealing cover, and the sealing cover and the mold core being coaxially arranged.

[0008] The base is rotatably provided with a first toothed ring, the meshing teeth of the first toothed ring are located at the top of the first toothed ring, and a lower mold sleeve is engaged at the middle position of the top of the first toothed ring. The lower mold sleeve has a mold cavity inside, and the mold cavity cooperates with the mold core.

[0009] The sealing cover is provided with a second toothed ring on the outside, and the meshing teeth of the second toothed ring are located at the bottom of the second toothed ring;

[0010] The base is provided with a mounting block, and the mounting block is provided with a drive gear. The drive gear is located between the first gear ring and the second gear ring, and the drive gear is meshed with the first gear ring. When the mold core is located inside the mold cavity for molding, the second gear ring is meshed with the drive gear.

[0011] The mounting block is equipped with a motor, and the output end of the motor is connected to the drive gear.

[0012] With the above technical solution, after the molding is completed, the motor drives the drive gear to rotate, which in turn drives the first gear ring and the second gear ring to rotate in opposite directions on the same axis. This causes the mold core and the lower mold sleeve to rotate in opposite directions on the same axis, which can better separate the inner surface of the graphite crucible from the mold core and the outer surface from the lower mold sleeve.

[0013] Furthermore, the base is provided with a rotating groove, and the bottom of the first toothed ring is rotatably disposed in the rotating groove, which better ensures the stability of the rotation of the first toothed ring.

[0014] Furthermore, the top of the first toothed ring is provided with a receiving groove, which is engaged with the bottom of the lower mold sleeve; four positioning grooves are evenly provided on the side of the receiving groove, and four positioning blocks are evenly provided on the lower side of the lower mold sleeve, which are engaged with the positioning grooves.

[0015] The above technical solution allows the lower die sleeve to be better engaged in the first toothed ring, and under the limiting action of the positioning block and the positioning groove, the lower die sleeve will not rotate relative to the first toothed ring.

[0016] Furthermore, the bottom of the sealing cover is rotatably provided with a lower pressure ring, which is coaxially arranged with the mold core;

[0017] The top of the sealing cover is provided with a sliding groove, and the two sliding grooves are arc-shaped and symmetrically arranged on both sides of the connecting rod;

[0018] A slider is slidably disposed within the groove. The bottom of the slider is fixedly connected to the top of the lower pressure ring, and a pressure rod is fixedly disposed on the top of the slider. A connecting ring is disposed on the outer side of the lower end of the connecting rod, and the two pressure rods are fixedly connected to the side of the connecting rod.

[0019] Through the above technical solution, while the mold core and the lower mold sleeve rotate, the lower pressure ring exerts pressure on the top of the graphite crucible, fixing it so that it does not rotate with the mold core or the lower mold sleeve, thus better separating the crucible from the mold core and the lower mold sleeve.

[0020] Furthermore, the lower end of the connecting rod is provided with a threaded line, and the threaded line is located below the connecting ring; the lower end of the connecting rod is threadedly connected to a threaded sleeve, the top of the threaded sleeve is fixedly connected to a tension spring, and the other end of the tension spring is fixedly connected to the bottom of the connecting ring.

[0021] The connecting ring is slidably connected to the connecting rod;

[0022] The connecting ring can be made of damping material, which has a buffering effect.

[0023] By rotating the threaded sleeve downwards, the tension spring exerts a downward pulling force on the connecting ring, thereby causing the connecting ring to slide down along the axis of the connecting rod. The pressure rod exerts downward pressure on the lower pressure ring, thereby creating pressure on the top of the crucible in the lower mold sleeve. This prevents the crucible from rotating with the mold core or the lower mold sleeve, thus better ensuring the separation of the crucible from the mold.

[0024] Furthermore, the threaded sleeve includes a first sleeve body and a rotating block. The first sleeve body is threadedly connected to the outside of the connecting rod. The top of the first sleeve body is provided with an annular groove, the cross-section of which is L-shaped. The rotating block is rotatably disposed inside the annular groove. The top of the rotating block is connected to one end of the tension spring.

[0025] With the above technical solution, during the rotation of the first set of bodies, the rotating block will not rotate with the first set of bodies, but will only move downward with the first set of bodies, thereby avoiding the generation of torque on the tension spring.

[0026] Furthermore, a sleeve is coaxially provided on the top of the sealing cover. The sleeve is fitted onto the outside of the first sleeve body. A movable groove is provided inside the sleeve. Two movable grooves are symmetrically arranged with the sleeve axis as the center. A movable block is fixedly provided on the outside of the first sleeve body. The movable block is slidably disposed in the movable groove.

[0027] With the above technical solution, when the sealing cover rotates with the second toothed ring, the first sleeve rotates with the sleeve and moves down along the moving groove under the limiting action of the moving block and the moving groove.

[0028] Furthermore, a limiting block is fixedly provided on the connecting rod, and the limiting block is located above the connecting ring.

[0029] The above technical solution limits the upward movement of the connecting ring.

[0030] This utility model has the following beneficial effects:

[0031] This invention uses a motor to drive a drive gear to rotate. The drive gear meshes with a first gear ring and a second gear ring, causing the first and second gear rings to rotate in the same direction. The rotation of the first gear ring causes the sealing cover and the mold core to rotate, separating the graphite crucible from the mold core. The rotation of the second gear ring causes the lower mold sleeve to rotate, separating the outer surface of the graphite crucible from the lower mold sleeve. Thus, after molding, the graphite crucible will not stick to the mold core and the lower mold sleeve. Furthermore, the lower mold sleeve is an integral structure, eliminating any gaps in the crucible and ensuring its quality. It also facilitates the removal of the crucible from the lower mold sleeve by the operator. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0034] Figure 2 This is a three-dimensional structural diagram showing the disassembled base, first toothed ring, and lower mold sleeve of this utility model.

[0035] Figure 3 This is a schematic diagram showing the disassembled structure of the sealing cap and the lower mold sleeve of this utility model;

[0036] Figure 4 This is a schematic diagram showing the disassembled structure of the lower pressure ring and sealing cap of this utility model;

[0037] Figure 5 This is a schematic diagram showing the disassembled structure of the threaded sleeve of this utility model.

[0038] The components include: 1. base; 11. bracket; 12. cylinder; 13. mounting block; 14. motor; 15. rotating slot;

[0039] 2. Connecting rod; 21. Connecting ring; 22. Threaded sleeve; 23. Tension spring; 24. Moving block; 25. Limiting block;

[0040] 221. First set of components; 222. Rotating block; 223. Annular groove;

[0041] 3. Sealing cap; 31. Lower pressure ring; 32. Slide groove; 33. Slider; 34. Pressure rod; 35. Sleeve; 36. Moving groove;

[0042] 4. Mold core;

[0043] 5. Lower mold sleeve; 51. Mold cavity; 52. Positioning block;

[0044] 6. First toothed ring; 61. Receiving groove; 62. Positioning groove;

[0045] 7. Second toothed ring;

[0046] 8. Drive gear. Detailed Implementation

[0047] 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.

[0048] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0049] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0050] like Figure 1-5 As shown, a mold for producing graphite crucibles includes a base 1, a support 11 on the base 1, a cylinder 12 on the support 11, a connecting rod 2 at the output end of the cylinder 12, a sealing cover 3 rotatably mounted at the bottom of the connecting rod 2, a mold core 4 at the bottom of the sealing cover 3, and the sealing cover 3 and the mold core 4 are coaxially arranged.

[0051] A first toothed ring 6 is rotatably mounted on the base 1. Specifically, the base 1 has a rotating groove 15, and the bottom of the first toothed ring 6 is rotatably positioned in the rotating groove 15, with the outer surface of the first toothed ring 6 in contact with the inner surface of the rotating groove 15, thus better ensuring the stability of the rotation of the first toothed ring 6. The meshing teeth of the first toothed ring 6 are located at the top of the first toothed ring 6, with the tooth shape facing upwards. A lower mold sleeve 5 is engaged at the middle of the top of the first toothed ring 6. Specifically, a receiving groove 61 is opened at the top of the first toothed ring 6, and the receiving groove 61 is engaged with the bottom of the lower mold sleeve 5. Four positioning grooves 62 are evenly provided on the side of the receiving groove 61, and four positioning blocks 5 are evenly provided on the lower side of the lower mold sleeve 5. 2. The positioning block 52 and the positioning groove 62 are engaged. The lower mold sleeve 5 has a mold cavity 51 inside, which cooperates with the mold core 4. The sealing cover 3 has a second toothed ring 7 on its outer side. The meshing teeth of the second toothed ring 7 are located at the bottom of the second toothed ring 7, and the teeth of the meshing teeth are set downwards. The base 1 has a mounting block 13, and the mounting block 13 has a drive gear 8. The drive gear 8 is located between the first toothed ring 6 and the second toothed ring 7, and the drive gear 8 is meshed with the first toothed ring 6. When the mold core 4 is located inside the mold cavity 51 for molding, the second toothed ring 7 is meshed with the drive gear 8. The mounting block 13 has a motor 14, and the output end of the motor 14 is connected to the drive gear 8.

[0052] In use, the graphite raw material is poured into the mold cavity 51 of the lower mold sleeve 5. The cylinder 12 drives the connecting rod 2 to move down, thereby moving the sealing cover 3, the mold core 4 and the first toothed ring 6 down. The mold core 4 enters the mold cavity 51 to press the graphite raw material. The first toothed ring 6 meshes with the drive gear 8. After pressing is completed, the motor 14 drives the drive gear 8 to rotate, thereby driving the first toothed ring 6 and the second toothed ring 7 to rotate coaxially in opposite directions. This makes the mold core 4 and the lower mold sleeve 5 rotate coaxially in opposite directions, which can better separate the inner surface of the graphite crucible from the mold core 4 and the outer surface from the lower mold sleeve 5. During the rotation, the motor 14 rotates slowly and can drive the drive gear 8 to rotate back and forth, so that the rotation degree of the first toothed ring 6 and the second toothed ring 7 is between 0 and 90 degrees. The back and forth rotation allows the mold core 4 and the lower mold sleeve 5 to better separate from the surface of the graphite crucible.

[0053] Furthermore, the bottom of the sealing cover 3 is rotatably equipped with a lower pressure ring 31, which is coaxially arranged with the mold core 4, and the lower surface of the lower pressure ring 31 contacts the top of the graphite crucible. The top of the sealing cover 3 has a sliding groove 32, two arc-shaped grooves 32 symmetrically arranged on both sides of the connecting rod 2. The bottom of the sliding groove 32 is the upper surface of the lower pressure ring 31. A slider 33 slides within the sliding groove 32, the bottom of the slider 33 is fixedly connected to the top of the lower pressure ring 31, and a pressure rod 34 is fixedly attached to the top of the slider 33. A connecting ring 21 is provided on the outer side of the lower end of the connecting rod 2, and two pressure rods 34 are fixedly connected to the side of the connecting rod 2. When the sealing cover 3 rotates with the first toothed ring 6, the lower pressure ring 31 does not rotate, but instead fixes the graphite crucible by contacting its upper surface, thus better ensuring the separation of the mold core 4 and the lower mold sleeve 5 from the crucible.

[0054] Furthermore, the lower end of the connecting rod 2 is provided with a threaded line, and the threaded line is located below the connecting ring 21; the lower end of the connecting rod 2 is threadedly connected to a threaded sleeve 22, and a tension spring 23 is fixedly connected to the top of the threaded sleeve 22, and the other end of the tension spring 23 is fixedly connected to the bottom of the connecting ring 21; the connecting ring 21 is slidably connected to the connecting rod 2, and the connecting ring 21 can slide up and down along the connecting rod 2, but will not rotate. Specifically, the interior of the connecting ring 21 can be a toothed structure or a vertical rod fixed to the connecting rod 2 and passing through the interior of the connecting ring 21, which plays a role in limiting the direction of the connecting ring 21; and the connecting ring 21 can be made of damping material, which has a buffering effect and will not generate large vibrations due to the force of the tension spring 23.

[0055] Furthermore, the threaded sleeve 22 includes a first sleeve body 221 and a rotating block 222. The first sleeve body 221 is threadedly connected to the outside of the connecting rod 2. The top of the first sleeve body 221 is provided with an annular groove 223, the cross-section of which is L-shaped. The rotating block 222 is rotatably disposed inside the annular groove 223. The top of the rotating block 222 is connected to one end of the tension spring 23. During the rotation of the first sleeve body 221, the rotating block 222 will not rotate with the first sleeve body 221, but will only move downward with the first sleeve body 221, thereby avoiding torque on the tension spring 23 and better protecting the tension spring 23. The top of the sealing cover 3 is coaxially provided with a sleeve 35, which is sleeved on the outside of the first sleeve body 221. On the side, a movable groove 36 is provided inside the sleeve 35. The two movable grooves 36 are symmetrically arranged with the axis of the sleeve 35 as the center. A movable block 24 is fixedly provided on the outside of the first sleeve 221. The movable block 24 is slidably disposed in the movable groove 36. The movable groove 36 limits the distance of the movable block 24 to ensure that the first sleeve 221 will not slip out of the threaded distance. Moreover, the downward movement distance of the first sleeve 221 is small. It is only necessary to drive the connecting ring 21 to drive the lower pressure ring 31 to generate pressure, so as to avoid excessive pressure on the top of the graphite crucible and damage. A limiting block 25 is fixedly provided on the connecting rod 2. The limiting block 25 is located above the connecting ring 21 and plays a role in limiting the upward movement position of the connecting ring 21.

[0056] The working principle of this invention is as follows: In use, graphite raw material is poured into the mold cavity 51 of the lower mold sleeve 5. The cylinder 12 drives the connecting rod 2 downwards, thereby causing the sealing cover 3, mold core 4, and first toothed ring 6 to move downwards. The mold core 4 enters the mold cavity 51 to press the graphite raw material. The first toothed ring 6 meshes with the drive gear 8. After pressing is completed, the motor 14 drives the drive gear 8 to rotate, thereby causing the first toothed ring 6 and the second toothed ring 7 to rotate coaxially in opposite directions. This coaxial and opposite rotation of the mold core 4 and the lower mold sleeve 5 allows for better separation of the inner surface of the graphite crucible from the mold core 4 and the outer surface from the lower mold sleeve 5. During the rotation, the motor 14 rotates slowly and can drive the drive gear 8 to rotate back and forth. When the sealing cover 3 rotates with the first toothed ring 6, the lower pressure ring 31 will not rotate. When the first sleeve 221 rotates with the sealing cover 3, it moves downward due to the thread action, which drives the tension spring 23 to generate a downward pulling force on the connecting ring 21, thereby driving the connecting ring 21 to slide down along the axis of the connecting rod 2. The pressure rod 34 generates downward pressure on the lower pressure ring 31, thereby generating pressure on the top of the crucible in the lower mold sleeve 5, so that the crucible will not rotate with the mold core 4 or the lower mold sleeve 5, thus better ensuring the separation of the crucible from the mold.

[0057] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A mold for producing graphite crucible, comprising a base (1), a support (11) is arranged on the base (1), characterized in that: The bracket (11) is provided with a cylinder (12), the output end of the cylinder (12) is provided with a connecting rod (2), the bottom of the connecting rod (2) is provided with a sealing cover (3), the bottom of the sealing cover (3) is provided with a mold core (4), and the sealing cover (3) and the mold core (4) are coaxially arranged; The base (1) is rotatably provided with a first toothed ring (6), the meshing teeth of the first toothed ring (6) are located on the top of the first toothed ring (6), and a lower mold sleeve (5) is engaged at the middle position of the top of the first toothed ring (6). A mold cavity (51) is opened inside the lower mold sleeve (5), and the mold cavity (51) cooperates with the mold core (4). The sealing cap (3) is provided with a second toothed ring (7) on the outside, and the meshing teeth of the second toothed ring (7) are located at the bottom of the second toothed ring (7); The base (1) is provided with a mounting block (13), and the mounting block (13) is provided with a drive gear (8). The drive gear (8) is located between the first gear ring (6) and the second gear ring (7). The drive gear (8) is meshed with the first gear ring (6). When the mold core (4) is located inside the mold cavity (51) for molding, the second gear ring (7) is meshed with the drive gear (8). The mounting block (13) is equipped with a motor (14), and the output end of the motor (14) is connected to the drive gear (8).

2. The mold for producing a graphite crucible according to claim 1, characterized by: The base (1) is provided with a rotating groove (15), and the bottom of the first toothed ring (6) is rotatably disposed in the rotating groove (15).

3. The mold for producing a graphite crucible according to claim 1, characterized by: The first toothed ring (6) has a receiving groove (61) at the top, and the receiving groove (61) is engaged with the bottom of the lower mold sleeve (5); the receiving groove (61) has four positioning grooves (62) evenly distributed on its side, and the lower mold sleeve (5) has four positioning blocks (52) evenly distributed at the lower end of its side, and the positioning blocks (52) are engaged with the positioning grooves (62).

4. The mold for producing a graphite crucible according to claim 1, characterized by: The bottom of the sealing cover (3) is provided with a lower pressure ring (31), which is coaxially arranged with the mold core (4); The top of the sealing cover (3) is provided with a sliding groove (32), and the two sliding grooves (32) are arc-shaped and symmetrically arranged on both sides of the connecting rod (2); A slider (33) is slidably provided in the groove (32). The bottom of the slider (33) is fixedly connected to the top of the lower pressure ring (31), and a pressure rod (34) is fixedly provided on the top of the slider (33). A connecting ring (21) is provided on the outer side of the lower end of the connecting rod (2), and the two pressure rods (34) are fixedly connected to the side of the connecting rod (2).

5. The mold for producing a graphite crucible according to claim 4, characterized by: The lower end of the connecting rod (2) is provided with a threaded line, and the threaded line is located below the connecting ring (21); the lower end of the connecting rod (2) is threadedly connected to a threaded sleeve (22), the top of the threaded sleeve (22) is fixedly connected to a tension spring (23), and the other end of the tension spring (23) is fixedly connected to the bottom of the connecting ring (21); The connecting ring (21) is slidably connected to the connecting rod (2).

6. The mold for producing a graphite crucible according to claim 5, characterized by: The threaded sleeve (22) includes a first sleeve body (221) and a rotating block (222). The first sleeve body (221) is threaded to the outside of the connecting rod (2). The top of the first sleeve body (221) is provided with an annular groove (223). The cross-section of the annular groove (223) is L-shaped. The rotating block (222) is rotatably disposed inside the annular groove (223). The top of the rotating block (222) is connected to one end of the tension spring (23).

7. The mold for producing a graphite crucible according to claim 6, characterized by: The top of the sealing cover (3) is coaxially provided with a sleeve (35), which is sleeved on the outside of the first sleeve (221). The sleeve (35) has a moving groove (36) inside, and the two moving grooves (36) are symmetrically arranged with the axis of the sleeve (35) as the center. A moving block (24) is fixedly provided on the outside of the first sleeve (221), and the moving block (24) is slidably disposed in the moving groove (36).

8. A mold for producing graphite crucibles according to any one of claims 4-7, characterized in that: A limiting block (25) is fixedly provided on the connecting rod (2), and the limiting block (25) is located above the connecting ring (21).

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