Annealing device for special casting aluminum oxide casting

Abstract

The invention discloses an annealing device for a special casting aluminum oxide casting, and particularly relates to the technical field of annealing devices.The annealing device comprises a base, an annealing assembly is arranged on the base and comprises an annealing cavity formed in the top of the base, and a reinforced tin foil heat insulation cover is arranged at the top of the annealing cavity; and a heating strip is mounted on the inner wall of the reinforced tin foil thermal insulation cover through a bolt. The reinforced tin foil thermal insulation cover is used for blocking and gathering heat of the heating strips, so that the heat can be gathered together through the conical sections of the heating strips and is close to a workpiece to be heated and annealed, meanwhile, the heat can be conveniently shunted through the shunting grooves, the gathered heat can be conveniently and uniformly distributed on the workpiece, and the heat utilization rate of the workpiece is improved. The workpiece can shake in the annealing cavity, impurities generated by annealing on the surface of the workpiece can fall off conveniently, the workpiece can be in full contact with the workpiece conveniently, and the annealing efficiency and effect of the workpiece are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of annealing devices, and more specifically, to an annealing device for special-shaped cast fused alumina castings. Background Art

[0002] Special-shaped cast fused alumina castings are products formed by melting a batch of refractory raw materials (mainly industrial alumina as the main raw material, adding a small amount of industrial soda ash, quartz sand or trace additives) at a temperature higher than the melting temperature of the material, pouring it into a prefabricated refractory mold with a specific special shape, and allowing the crystal structure to grow and develop through cooling and solidification. Annealing treatment is a process of heating and holding to re-arrange and grow the grains inside metals or alloys, thereby improving the material properties. For cast fused alumina castings, annealing is also an important heat treatment process. During the solidification and cooling process of cast fused alumina castings, residual stresses will be generated due to factors such as temperature gradient and phase change. These stresses may cause the castings to crack or deform during use. Through annealing treatment, the internal stresses of the castings can be released and balanced, thereby improving the stability and service life of the castings.

[0003] Among them, the patent with publication number CN221522704U discloses an annealing furnace for casting processing, including a furnace body and an annealing box. The annealing box is arranged inside the furnace body. There are two support frames arranged inside the furnace body. A support shaft is inserted and connected between the inner walls of the two support frames. The annealing box is movably sleeved on one end of the support shaft. A motor is fixedly installed inside the furnace body. The output shaft of the motor is drivingly connected to a rotating rod. An auxiliary sleeve is fixedly sleeved at one end of the rotating rod. An arc-shaped plate is fixedly installed inside the furnace body;

[0004] When this structure is in use, by setting the motor, auxiliary sleeve, movable frame, moving plate, support shaft and annealing box, starting the motor can drive the rotating rod to rotate, and the auxiliary sleeve and the movable frame will also rotate. The castings will continuously move back and forth inside the annealing box. As the position of the castings moves, the annealing box will gradually rotate at one end of the support shaft, increasing the amplitude of the shaking of the castings inside the annealing box and improving the annealing efficiency of the annealing furnace for the castings. However, when this structure is in use, it is not easy to gather the heat together, resulting in low annealing efficiency, and a large amount of impurities will be generated on the surface of the workpiece during annealing, and it is impossible to clean them, causing the impurities to block the temperature and affecting the annealing quality. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an annealing device for special-shaped cast fused alumina castings, aiming to solve the problems raised in the above background art.

[0006] The present invention provides the following technical solution: an annealing device for special-shaped investment cast alumina castings, including a base, and an annealing assembly is arranged on the base;

[0007] The annealing assembly includes an annealing chamber arranged on the top of the base. A reinforced tin foil heat insulation cover is arranged on the top of the annealing chamber. Heating strips are installed on the inner wall of the reinforced tin foil heat insulation cover through bolts. A flow dividing cover is arranged in the middle of the reinforced tin foil heat insulation cover;

[0008] A rotating shaft is rotatably connected to the middle of the flow dividing cover. A connecting disc is installed at the bottom of the rotating shaft through bolts. A plurality of extendable rods with adjustable angles are hinged to the bottom of the connecting disc, and carbon steel brushes are arranged on each of the extendable rods;

[0009] Flow dividing grooves are formed through the outer side of the flow dividing cover. A plurality of first springs are embedded in the top of the flow dividing cover, and the top ends of the first springs all extend to the top of the inner cavity of the reinforced tin foil heat insulation cover. The heating strips and the flow dividing grooves are both spiral in shape. The reinforced tin foil heat insulation cover and the flow dividing cover are both conical in shape;

[0010] It can be seen that in the above technical solution, the reinforced tin foil heat insulation cover can cover the annealing chamber. After being heated by the heating strips, the reinforced tin foil heat insulation cover blocks and gathers the heat of the heating strips, so that the heat can gather together through the conical cross-section of the heating strips and approach the workpiece for heating and annealing. At the same time, the setting of the flow dividing grooves facilitates the diversion of heat, and the heat gathered together can be evenly distributed on the workpiece, ensuring the annealing effect. By driving the rotating shaft, the connecting disc, the extendable rods and the carbon steel brushes to rotate through a driving motor, the carbon steel brushes and the extendable rods can contact the workpiece when rotating, realizing the function of cleaning the impurities generated during the annealing of the workpiece;

[0011] Optionally, in a possible implementation, a driving motor is installed on the top of the flow dividing cover through bolts. The output end of the driving motor penetrates through the flow dividing cover and extends to the top of the rotating shaft, and the output end of the driving motor is detachably connected to the rotating shaft through bolts. The vertical cross-sectional shape of the annealing chamber is set to be conical, and several alloy cylinders are distributed at the bottom of the inner cavity of the annealing chamber. The bottoms of the inner walls of the plurality of alloy cylinders are all installed with second springs through bolts, and a backing plate for lifting the workpiece is arranged at the top of each second spring. A reinforcing pad is installed at the bottom end of the flow dividing cover through bolts. A clamping groove is formed in the inner wall of the annealing chamber, and the reinforcing pad is matched with the clamping groove. The reinforcing pad extends into the clamping groove and is clamped with the clamping groove. A reinforcing L-shaped rod is fixedly arranged on one side of the top of the base. One end of the reinforcing L-shaped rod extends above the reinforcing tin foil heat insulation cover, and a hydraulic rod is installed at the end of the reinforcing L-shaped rod through bolts. The output end of the hydraulic rod extends to the top end of the reinforcing tin foil heat insulation cover, and the output end of the alloy cylinder is detachably connected to the reinforcing tin foil heat insulation cover through bolts. A side connecting seat is fixedly arranged on one side of the reinforcing L-shaped rod. A cross bar is arranged on the side connecting seat. One end of the cross bar extends to the bottom of the annealing chamber. A limiting shaft is fixedly arranged on the side connecting seat. The limiting shaft is inserted into the cross bar and is rotatably connected to the cross bar. Hooks are fixedly arranged on one side of the side connecting seat and at the bottom of the cross bar, and a return spring is arranged on each of the two hooks. An inclined baffle is fixedly arranged at one end of the cross bar. The inclined baffle is located on one side of the bottom of the annealing chamber. Cross blocks are fixedly arranged on both sides of the bottom of the annealing chamber. The cross blocks cover the cross bar. An extension ring is fixedly arranged at the bottom end of the reinforcing tin foil heat insulation cover. The extension ring covers the outside of the annealing chamber;

[0012] It can be seen that in the above technical solution, the workpiece is placed in each alloy cylinder, and the backing plate supports the workpiece. The second spring is compressed under force, realizing the function of adjusting the position of the backing plate in the alloy cylinder, making it easy for the alloy cylinder to abut against the bottom of the workpiece, ensuring the stability of the workpiece during annealing. When the carbon steel brush rubs against the workpiece, it can also drive the annealing chamber to rotate along the axis point of the connection between the cross bar and the limiting shaft, so that the annealing chamber and the cross bar can undergo appropriate displacement. When the annealing chamber is displaced, the return spring will be stretched, and the annealing chamber will be pulled back to its original position by the elasticity of the return spring itself, enabling the workpiece to shake in the annealing chamber, facilitating the shedding of impurities generated during the annealing of the workpiece surface, facilitating the full contact of the hot temperature with the workpiece, and ensuring its annealing efficiency and effect.

[0013] The technical effects and advantages of the present invention:

[0014] 1. In the present invention, a strengthened tin foil heat insulation cover can be sleeved on the annealing chamber. After being heated by the heating strip, the strengthened tin foil heat insulation cover blocks and gathers the heat of the heating strip, enabling the heat to gather together through the conical cross-section of the heating strip and approach the workpiece for heating and annealing. Meanwhile, the setting of the diversion groove facilitates the diversion of heat, allowing the gathered heat to be evenly distributed on the workpiece, ensuring the annealing effect.

[0015] 2. In the present invention, a driving motor drives the rotation of the rotating shaft, the connecting disk, the extension rod, and the carbon steel brush. When the carbon steel brush and the extension rod rotate, they can come into contact with the workpiece, realizing the function of cleaning the impurities generated during the annealing of the workpiece.

[0016] 3. In the present invention, when the carbon steel brush rubs against the workpiece, it can also drive the annealing chamber to rotate along the axis point where the cross bar is connected to the limit shaft, causing the annealing chamber and the cross bar to undergo appropriate displacement. When the annealing chamber is displaced, it will stretch the reset spring, and the reset spring will pull the annealing chamber back to its original position by its own elasticity, enabling the workpiece to shake in the annealing chamber, facilitating the shedding of the impurities generated on the surface of the workpiece during annealing, and facilitating the full contact of the heat with the workpiece, ensuring its annealing efficiency and effect.

[0017] 4. In the present invention, the workpiece is supported by the backing plate, and the second spring is compressed under force, realizing the function of adjusting the position of the backing plate in the alloy cylinder, making it easy for the alloy cylinder to abut against the bottom of the workpiece, ensuring the stability of the workpiece during annealing. The strengthening pad can be stuck on the card slot to limit the diversion cover, and the strengthened tin foil heat insulation cover can continue to move downward and wrap around the outside of the annealing chamber, realizing the sealing function, which can effectively reduce the heat loss rate.

[0018] In summary, through the coordinated use of each structure, the strengthened tin foil heat insulation cover can be sleeved on the annealing chamber. After being heated by the heating strip, the strengthened tin foil heat insulation cover blocks and gathers the heat of the heating strip, enabling the heat to gather together through the conical cross-section of the heating strip and approach the workpiece for heating and annealing. Meanwhile, the setting of the diversion groove facilitates the diversion of heat, allowing the gathered heat to be evenly distributed on the workpiece. When the carbon steel brush and the extension rod rotate, they can come into contact with the workpiece, realizing the function of cleaning the impurities generated during the annealing of the workpiece and making them fall off from the workpiece. At the same time, when the carbon steel brush rubs against the workpiece, it can also drive the annealing chamber to rotate along the axis point where the cross bar is connected to the limit shaft, causing the annealing chamber and the cross bar to undergo appropriate displacement. When the annealing chamber is displaced, it will stretch the reset spring, and the reset spring will pull the annealing chamber back to its original position by its own elasticity, enabling the workpiece to shake in the annealing chamber, facilitating the shedding of the impurities generated on the surface of the workpiece during annealing, and facilitating the full contact of the heat with the workpiece, ensuring its annealing efficiency and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions in the present disclosure, the following will briefly introduce the accompanying drawings required for some embodiments. Obviously, the accompanying drawings in the following description are only those of some embodiments of the present disclosure. For those of ordinary skill in the art, other accompanying drawings can also be obtained based on these drawings. In addition, the accompanying drawings in the following description can be regarded as schematic diagrams and do not limit the actual dimensions of the products involved in the embodiments of the present disclosure, the actual processes of the methods, the actual timings of the signals, etc.

[0020] Figure 1 It is the front view of the overall structure of the present invention.

[0021] Figure 2 It is the cross-sectional view of the annealing component of the present invention.

[0022] Figure 3 It is a schematic diagram of the heating strip, shunt cover and connection plate of the present invention installed in the reinforced tin foil heat insulation cover.

[0023] Figure 4 It is the three-dimensional view of the base, reinforced L-shaped rod, hydraulic rod, reinforced tin foil heat insulation cover and heating strip of the present invention.

[0024] Figure 5 It is the three-dimensional view of the shunt cover, drive motor, extension rod and carbon steel brush of the present invention.

[0025] Figure 6 It is the three-dimensional view of the cross bar, annealing chamber, inclined baffle, backing plate, alloy cylinder and return spring of the present invention.

[0026] Figure 7 For the present invention Figure 5 exploded view.

[0027] The reference numerals are: 1, base; 2, annealing chamber; 3, reinforced tin foil heat insulation cover; 4, heating strip; 5, shunt cover; 6, rotating shaft; 7, connection plate; 8, extension rod; 9, carbon steel brush; 10, shunt groove; 11, first spring; 12, drive motor; 13, alloy cylinder; 14, second spring; 15, backing plate; 16, reinforcing pad; 17, clamping groove; 18, reinforced L-shaped rod; 19, hydraulic rod; 20, side connecting seat; 21, cross bar; 22, limiting shaft; 23, hook; 24, return spring; 25, inclined baffle; 26, extension ring; 27, cross stop block. Detailed implementation manners

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] As shown in the attached Figure 1 - Figure 7 Annealing device for special-shaped fused alumina castings shown, through the annealing component set on the base 1, the enhanced tin foil heat insulation cover 3 can cover the annealing chamber 2. Heated by the heating strip 4, the enhanced tin foil heat insulation cover 3 blocks and gathers the heat of the heating strip 4, so that the heat can gather together through the conical section of the heating strip 4 and approach the workpiece for heating and annealing. At the same time, the setting of the diversion groove 10 facilitates the diversion of heat, and the heat gathered together is evenly distributed on the workpiece. When the carbon steel brush 9 and the extension rod 8 rotate, they can contact the workpiece, realizing the function of cleaning the impurities generated during the annealing of the workpiece, making them fall off from the workpiece. At the same time, when the carbon steel brush 9 rubs against the workpiece, it can also drive the annealing chamber 2 to rotate along the axis point where the cross bar 21 and the limit shaft 22 are connected, so that the annealing chamber 2 and the cross bar 21 can have an appropriate displacement. When the annealing chamber 2 is displaced, the reset spring 24 will be stretched, and the annealing chamber 2 will be pulled back to its original position by the elasticity of the reset spring 24 itself, so that the workpiece can shake in the annealing chamber 2, facilitating the shedding of the impurities generated on the surface of the workpiece during annealing, facilitating the full contact of the heat with the workpiece, ensuring its annealing efficiency and effect, and the specific structure of the components is as follows;

[0030] The annealing component includes an annealing chamber 2 arranged at the top of the base 1. A strengthened tin foil heat insulation cover 3 is arranged at the top of the annealing chamber 2. A heating strip 4 is installed on the inner wall of the strengthened tin foil heat insulation cover 3 through bolts. A diversion cover 5 is arranged in the middle of the strengthened tin foil heat insulation cover 3;

[0031] A rotating shaft 6 is rotatably connected to the middle of the diversion cover 5. A connecting disk 7 is installed at the bottom of the rotating shaft 6 through bolts. A plurality of angle-adjustable extension rods 8 are hinged at the bottom of the connecting disk 7, and carbon steel brushes 9 are arranged on each extension rod 8;

[0032] A diversion groove 10 is penetrated and opened on the outside of the diversion cover 5. A plurality of first springs 11 are embedded in the top of the diversion cover 5, and the top ends of each first spring 11 extend to the top of the inner cavity of the strengthened tin foil heat insulation cover 3. The shapes of the heating strip 4 and the diversion groove 10 are both set as spiral shapes, and the shapes of the strengthened tin foil heat insulation cover 3 and the diversion cover 5 are both set as conical shapes;

[0033] The top of the flow divider cover 5 is installed with a driving motor 12 through bolts. The output end of the driving motor 12 penetrates through the flow divider cover 5 and extends to the top of the rotating shaft 6. And the output end of the driving motor 12 is detachably connected to the rotating shaft 6 through bolts. The vertical cross-sectional shape of the annealing chamber 2 is set to be conical, and several alloy cylinders 13 are distributed at the inner cavity bottom of the annealing chamber 2. At the bottom of the inner walls of the multiple alloy cylinders 13, second springs 14 are installed through bolts. And at the top of each second spring 14, there is a backing plate 15 for lifting the workpiece. The bottom end of the flow divider cover 5 is installed with a reinforcing pad 16 through bolts. A clamping groove 17 is formed in the inner wall of the annealing chamber 2. The reinforcing pad 16 is matched with the clamping groove 17. The reinforcing pad 16 extends into the clamping groove 17 and is clamped with the clamping groove 17. On one side of the top of the base 1, a reinforcing L-shaped rod 18 is fixedly arranged. One end of the reinforcing L-shaped rod 18 extends above the reinforcing tin foil heat insulation cover 3. And at the end of the reinforcing L-shaped rod 18, a hydraulic rod 19 is installed through bolts. The output end of the hydraulic rod 19 extends to the top end of the reinforcing tin foil heat insulation cover 3. And the output end of the alloy cylinder 13 is detachably connected to the reinforcing tin foil heat insulation cover 3 through bolts. On one side of the reinforcing L-shaped rod 18, a side connecting seat 20 is fixedly arranged. A cross bar 21 is arranged on the side connecting seat 20. One end of the cross bar 21 extends to the bottom of the annealing chamber 2. A limiting shaft 22 is fixedly arranged on the side connecting seat 20. The limiting shaft 22 is inserted into the cross bar 21 and is rotatably connected to the cross bar 21. On one side of the side connecting seat 20 and at the bottom of the cross bar 21, hooks 23 are fixedly arranged. And on both of the two hooks 23, there is a return spring 24. One end of the cross bar 21 is fixedly arranged with an inclined baffle 25. The inclined baffle 25 is located on one side of the bottom of the annealing chamber 2. On both sides of the bottom of the annealing chamber 2, cross blocking blocks 27 are fixedly arranged. The cross blocking blocks 27 cover the cross bar 21. At the bottom end of the reinforcing tin foil heat insulation cover 3, an extension ring 26 is fixedly arranged. The extension ring 26 covers the outside of the annealing chamber 2.

[0034] During use according to the above structure, the staff installs the device at a designated position. When annealing the formed workpiece, the output end of the hydraulic rod 19 retracts to drive the structures on the reinforcing tin foil heat insulation cover 3, the heating strip 4 and the flow divider cover 5 to move upward, so that the reinforcing tin foil heat insulation cover 3 can be separated from the annealing chamber 2, which is convenient for the staff to place the workpiece in the annealing chamber 2 for annealing. At the same time, when the workpiece is being annealed, the workpiece is placed in each alloy cylinder 13, and the backing plate 15 supports the workpiece. And the second spring 14 is compressed by the force, realizing the function of adjusting the position of the backing plate 15 in the alloy cylinder 13, which is convenient for the alloy cylinder 13 to abut against the bottom of the workpiece, ensuring the stability of the workpiece during annealing.

[0035] Meanwhile, during annealing, the hydraulic rod 19 drives the reinforced tin foil heat insulation cover 3 to drive each structure to displace downward, so that the reinforced tin foil heat insulation cover 3 can cover the annealing chamber 2. After being heated by the heating strip 4, the reinforced tin foil heat insulation cover 3 blocks and gathers the heat of the heating strip 4, so that the heat can be gathered together through the conical cross-section of the heating strip 4 and approach the workpiece for heating and annealing. At the same time, the setting of the shunt groove 10 facilitates the shunting of heat, and the heat gathered together is evenly distributed on the workpiece, ensuring the annealing effect;

[0036] And when the reinforced tin foil heat insulation cover 3 displaces downward to cover the annealing chamber 2, the reinforcing pad 16 can be stuck on the clamping groove 17 to limit the position of the shunt cover 5, and the reinforced tin foil heat insulation cover 3 can continue to displace downward and wrap around the outside of the annealing chamber 2 to achieve the sealing function, which can effectively reduce the heat loss speed;

[0037] Meanwhile, when the workpiece is annealed, the driving motor 12 drives the rotating shaft 6, the connecting disk 7, the extension rod 8 and the carbon steel brush 9 to rotate. When the carbon steel brush 9 and the extension rod 8 rotate, they can contact the workpiece to realize the function of cleaning the impurities generated during the annealing of the workpiece, so that they fall off from the workpiece. At the same time, when the carbon steel brush 9 rubs against the workpiece, it can also drive the annealing chamber 2 to rotate along the center point of the connection between the cross bar 21 and the limiting shaft 22, so that the annealing chamber 2 and the cross bar 21 can undergo appropriate displacement. When the annealing chamber 2 displaces, it will stretch the return spring 24, and the return spring 24 will pull the annealing chamber 2 back to its original position by its own elasticity, so that the workpiece can shake in the annealing chamber 2, facilitating the shedding of the impurities generated on the surface of the workpiece during annealing, facilitating the full contact of the heat and temperature with the workpiece, ensuring its annealing efficiency and effect. Subsequently, the staff can take it out for cooling, which is convenient for the device to heat and anneal the remaining castings.

[0038] Differing from the prior art, the present application discloses an annealing device for special-shaped investment cast alumina castings. Through the corresponding cooperation of each structure, the enhanced tin foil heat insulation cover 3 can cover the annealing chamber 2. After being heated by the heating strip 4, the enhanced tin foil heat insulation cover 3 blocks and gathers the heat of the heating strip 4, so that the heat can gather together through the conical cross-section of the heating strip 4 and approach the workpiece for heating and annealing. At the same time, the setting of the diversion groove 10 facilitates the diversion of heat, and the heat gathered together is evenly distributed on the workpiece. When the carbon steel brush 9 and the extension rod 8 rotate, they can contact the workpiece, realizing the function of cleaning the impurities generated during the annealing of the workpiece, making them fall off from the workpiece. At the same time, when the carbon steel brush 9 rubs against the workpiece, it can also drive the annealing chamber 2 to rotate around the axis point of the connection between the cross bar 21 and the limit shaft 22, so that the annealing chamber 2 and the cross bar 21 can undergo appropriate displacement. When the annealing chamber 2 is displaced, the return spring 24 will be stretched, and the annealing chamber 2 will be pulled back to its original position by the elasticity of the return spring 24 itself, so that the workpiece can shake in the annealing chamber 2, facilitating the shedding of the impurities generated on the surface of the workpiece during annealing, facilitating the full contact of the heat and temperature with the workpiece, and ensuring its annealing efficiency and effect.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Annealing device for special-shaped fused cast alumina castings, including a base (1), characterized in that: An annealing component is provided on the base (1); The annealing component includes an annealing chamber (2) provided on the top of the base (1). A reinforced tin foil heat insulation cover (3) is provided on the top of the annealing chamber (2). A heating strip (4) is installed on the inner wall of the reinforced tin foil heat insulation cover (3) through bolts. A flow dividing cover (5) is provided in the middle of the reinforced tin foil heat insulation cover (3); A rotating shaft (6) is rotatably connected to the middle of the flow dividing cover (5). A connecting disk (7) is installed at the bottom of the rotating shaft (6) through bolts. A plurality of angle-adjustable extension rods (8) are hinged to the bottom of the connecting disk (7), and carbon steel brushes (9) are provided on each of the extension rods (8); Flow dividing grooves (10) are penetratingly provided on the outer side of the flow dividing cover (5). A plurality of first springs (11) are embedded in the top of the flow dividing cover (5), and the top ends of the first springs (11) all extend to the top of the inner cavity of the reinforced tin foil heat insulation cover (3).

2. The annealing device for special-shaped investment casting alumina castings according to claim 1, characterized in that: The heating strip (4) and the flow dividing grooves (10) are both spiral in shape, and the reinforced tin foil heat insulation cover (3) and the flow dividing cover (5) are both conical in shape.

3. The annealing device for special-shaped investment-cast alumina castings according to claim 1, wherein: A driving motor (12) is installed on the top of the flow dividing cover (5) through bolts. The output end of the driving motor (12) penetrates through the flow dividing cover (5) and extends to the top of the rotating shaft (6), and the output end of the driving motor (12) is detachably connected to the rotating shaft (6) through bolts.

4. The annealing device for special-shaped investment casting alumina castings according to claim 1, characterized in that: The vertical cross-sectional shape of the annealing chamber (2) is conical, and a plurality of alloy cylinders (13) are distributed at the bottom of the inner cavity of the annealing chamber (2).

5. The annealing device for special-shaped investment cast alumina castings according to claim 4, characterized in that: Second springs (14) are installed at the bottoms of the inner walls of the plurality of alloy cylinders (13) through bolts, and pads (15) for lifting workpieces are provided at the tops of the second springs (14).

6. The annealing device for special-shaped investment-cast alumina castings according to claim 1, characterized in that: A reinforcing pad (16) is installed at the bottom end of the flow dividing cover (5) through bolts. A clamping groove (17) is provided on the inner wall of the annealing chamber (2). The reinforcing pad (16) is matched with the clamping groove (17), and the reinforcing pad (16) extends into the clamping groove (17) and is clamped with the clamping groove (17).

7. The annealing device for special-shaped investment cast alumina castings according to claim 4, wherein: A reinforcing L-shaped rod (18) is fixedly provided on one side of the top of the base (1). One end of the reinforcing L-shaped rod (18) extends above the reinforced tin foil heat insulation cover (3), and a hydraulic rod (19) is installed at the end of the reinforcing L-shaped rod (18) through bolts. The output end of the hydraulic rod (19) extends to the top end of the reinforced tin foil heat insulation cover (3), and the output end of the alloy cylinder (13) is detachably connected to the reinforced tin foil heat insulation cover (3) through bolts.

8. The annealing device for special-shaped investment cast alumina castings according to claim 7, characterized in that: A side connecting seat (20) is fixedly provided on one side of the reinforcing L-shaped rod (18). A cross bar (21) is provided on the side connecting seat (20). One end of the cross bar (21) extends to the bottom of the annealing chamber (2).

9. The annealing device for special-shaped investment cast alumina castings according to claim 8, wherein: A limiting shaft (22) is fixedly provided on the side connecting seat (20). The limiting shaft (22) is inserted into the cross bar (21) and rotatably connected to the cross bar (21). Hooks (23) are fixedly provided on one side of the side connecting seat (20) and the bottom of the cross bar (21), and return springs (24) are provided on both of the hooks (23).

10. The annealing device for special-shaped investment cast alumina castings according to claim 8, characterized in that: One end of the cross bar (21) is fixedly provided with an inclined baffle (25). The inclined baffle (25) is located on one side of the bottom of the annealing chamber (2). Both sides of the bottom of the annealing chamber (2) are fixedly provided with cross stoppers (27). The cross stoppers (27) cover the cross bar (21). The bottom end of the enhanced tin foil heat insulation cover (3) is fixedly provided with an extension ring (26). The extension ring (26) covers the outside of the annealing chamber (2).

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