A centrifugal casting device and method for tin bronze

Abstract

The present invention relates to the technical field of centrifugal casting, and discloses a centrifugal casting device and method for tin bronze. The centrifugal casting device includes a centrifugal casting machine. At one end of the centrifugal casting machine, there is a second runner ladle for pouring tin bronze melt. Inside the second runner ladle, there is a slurry-breaking mechanism for separating the tin bronze melt. In the flowing direction of the tin bronze melt in the second runner ladle, there is a nitrogen blowing mechanism for introducing nitrogen into the melt. By precisely rotating the slurry-breaking mechanism, the present invention can strictly control the amount of tin bronze melt flowing into the centrifugal inner mold, ensuring that the amount of melt for each casting meets the preset requirements, thereby improving the accuracy and consistency of the castings. During the rotation of the slurry-breaking plate, it can effectively prevent impurities above the melt from entering the centrifugal inner mold, ensuring the purity of the castings.

Description

Technical Field

[0001] The present invention relates to the field of centrifugal casting, and more particularly, to a centrifugal casting device and method for tin bronze. Background Art

[0002] Tin bronze has good wear resistance and corrosion resistance and is widely used in various valve bodies, pipe fittings, and bearing fields. However, due to the very low melting point of tin, which is quite different from that of copper, macrosegregation and inverse segregation are extremely likely to occur in normal melting and forming processes. Therefore, melting and casting are very difficult, and the comprehensive performance of tin bronze castings prepared by conventional methods is generally average, severely restricting the application of tin bronze.

[0003] During the process of adding tin bronze melt into the centrifugal casting machine, its liquid surface will be in direct contact with oxygen in the air, thus undergoing an oxidation reaction, which is a natural chemical reaction between metal and oxygen at high temperature. This will cause an oxide layer to form on the metal surface, and the oxides will enter the mold and are more likely to adhere to the mold, resulting in defects in the workpiece. For this reason, we propose a centrifugal casting device and method for tin bronze. Summary of the Invention

[0004] The present invention provides a centrifugal casting device and method for tin bronze, which solves the technical problem in related technologies that oxides enter the mold and are more likely to adhere to the mold, resulting in defects in the workpiece. In particular, when centrifugally casting tin bronze, nitrogen is introduced into the tin bronze melt, resulting in more impurities, and the impurities on the melt surface greatly increase the defect rate of tin bronze castings.

[0005] The first aspect of the present invention provides a centrifugal casting device for tin bronze, including a centrifugal casting machine. One end of the centrifugal casting machine is provided with a two-way ladle for pouring tin bronze melt. Inside the two-way ladle, there is a slurry-breaking mechanism for separating the tin bronze melt. In the flow direction of the tin bronze melt in the two-way ladle, there is a nitrogen injection mechanism for injecting nitrogen into the melt.

[0006] The slurry-breaking mechanism includes a slurry-breaking plate and a secondary slurry discharge plate. Both the slurry-breaking plate and the secondary slurry discharge plate are rotatably arranged on the inner wall of the two-way ladle. When the melt pouring in the centrifugal casting machine reaches a preset value, the slurry-breaking plate is pulled out by a control member to separate the melt in the two-way ladle. The secondary slurry discharge plate is driven by a driving member to rotate as the liquid level of the melt above the slurry-breaking plate drops.

[0007] The nitrogen injection mechanism includes a ceramic column and a nitrogen supply member. The lower surface of the ceramic column is provided with a plurality of gas injection holes. Before the slurry-breaking plate is pulled out, nitrogen is injected into the ceramic column by the nitrogen supply member, and the nitrogen bubbles ejected from the plurality of gas injection holes flow upward in the melt. After bringing the impurities in the melt to the melt surface, they are discharged as the secondary slurry discharge plate is pulled out.

[0008] Furthermore, a centrifugal inner mold is rotatably arranged inside the centrifugal casting machine. Multiple groups of driving wheels are arranged on the side of the centrifugal inner mold. The driving wheels are connected to the motor. The motor drives the driving wheels to rotate, and the rotation of the driving wheels tangent to the centrifugal inner mold drives the centrifugal inner mold to rotate, so that the tin bronze molten slurry poured into the centrifugal inner mold evenly covers the inner wall of the centrifugal inner mold.

[0009] Furthermore, a slurry outlet is opened on one side of the second ladle close to the secondary slurry discharge plate. One side close to the slurry outlet is fixedly connected to the ladle body, and the ladle body and the second ladle are interconnected. A residual slurry discharge plate fixedly connected to the second ladle is arranged below the slurry outlet. The residual slurry discharge plate penetrates through the ladle body. The ladle body is assembled and connected to the feeding port of the centrifugal casting machine. A slurry stirring motor is installed at the bottom of the ladle body. A stirring middle column is meshed with the slurry stirring motor. Two stirring shafts are arranged on the stirring middle column.

[0010] Furthermore, the control member includes an electromagnet fixedly connected to the second ladle. A pull wire and a pull plate wire are fixedly arranged on the telescopic column of the electromagnet. A tension receiving column is fixedly arranged at one end of the pull wire away from the electromagnet, and the slurry cutting plate and the tension receiving column form a ninety-degree angle.

[0011] Furthermore, a limiting groove is opened on the outer wall of the second ladle below the tension receiving column. A wire passing hole is opened below the limiting groove. The pull wire passes through the wire passing hole and is connected to the tension receiving column, and the pull wire has an inclined V-shaped structure. The limiting groove does not penetrate through the wall plate of the second ladle.

[0012] Furthermore, one end of the pull plate wire away from the electromagnet penetrates through the chassis of the centrifugal casting machine and is provided with a transmission member. The transmission member includes a bearing plate. A tape winding wheel is rotatably arranged inside the bearing plate. A follower head is fixedly arranged on one side of the driving wheel close to the tape winding wheel. A telescopic head connected in a sliding manner is arranged inside the tape winding wheel. A push plate is fixedly connected to one end of the telescopic head away from the follower head. A Z-shaped rocker is rotatably arranged on the side wall of the bearing plate. One end of the rocker away from the push plate is fixedly connected to the pull plate wire, and one end of the rocker close to the push plate is connected to the push plate through a silk thread.

[0013] Furthermore, the slurry inlet of the secondary slurry discharge plate is a slurry discharge inlet with an inclined surface, and the slurry outlet of the secondary slurry discharge plate is a flow outlet. Driving members are connected to both ends of the secondary slurry discharge plate. The driving members include rotating columns. A reset coil spring is fixedly arranged inside the rotating columns. A winding belt is wound around the outer wall of the rotating columns, and one end of the winding belt away from the rotating columns is connected to the tape winding wheel.

[0014] Furthermore, the nitrogen supply member includes a nitrogen supply pipe internally communicating with the ceramic column. The air inlet end of the nitrogen supply pipe is connected to a control valve through a hose. The air inlet end of the control valve is connected to an external nitrogen supply pump body.

[0015] Further, a blocking column is slidably arranged inside the control valve. A spring is fixedly arranged inside the blocking column. One end of the blocking column away from the spring is fixedly connected with an extrusion head penetrating through the blocking column.

[0016] The second aspect of the present invention provides a method for using a centrifugal casting device for tin bronze, including the following steps:

[0017] S1. Lift the ladle body filled with tin bronze molten slurry to the feeding port position of the centrifugal casting machine. During the lifting of the ladle body, the stirring shaft is driven by the slurry stirring motor to stir, and at the same time, nitrogen is injected into the tin bronze molten slurry through the stirring shaft. At the same time, the secondary ladle is inserted into the feeding port of the centrifugal casting machine, and the drawbar wire and the winding belt are manually tied.

[0018] Open the communication valve between the secondary ladle and the ladle body, and let more than the required amount of tin bronze molten slurry flow into the secondary ladle. Start the nitrogen injection mechanism, and inject nitrogen into the molten slurry through the ceramic column for hydrogen removal and refining.

[0019] S2. After the refining is completed, control the electromagnet to work, so that its telescopic column retracts, pull the tension column through the pull column wire, and then drive the slurry breaking plate to rotate 85°, dividing the molten slurry into upper and lower parts.

[0020] S3. Open the valve between the secondary ladle and the centrifugal inner mold, so that the molten slurry flows into the centrifugal inner mold. The motor drives the driving wheel to rotate, and then drives the centrifugal inner mold to rotate at a high speed. The molten slurry is evenly distributed on the inner wall of the centrifugal inner mold by centrifugal force.

[0021] S4. While the molten slurry flows into the centrifugal inner mold, the molten slurry and impurities above the slurry breaking plate flow into the residual slurry discharge plate through the slurry discharge inlet and the flow outlet, and finally flow into the ladle body for recycling.

[0022] The beneficial effects of the present invention are as follows:

[0023] Through the precise rotation of the slurry breaking mechanism of the present invention, the amount of tin bronze molten slurry flowing into the centrifugal inner mold can be strictly controlled, ensuring that the amount of molten slurry for each casting meets the preset requirements, thereby improving the accuracy and consistency of the castings. During the rotation of the slurry breaking plate, it can effectively prevent impurities above the molten slurry from entering the centrifugal inner mold, ensuring the purity of the castings;

[0024] The nitrogen injection of the nitrogen injection mechanism can effectively remove hydrogen and other gas impurities in the tin bronze molten slurry, improving the purity and quality of the molten slurry. When the nitrogen bubbles float and burst in the molten slurry, a strong stirring effect will be generated, which helps to refine the grains in the molten slurry, improving the mechanical properties and surface quality of the castings. The nitrogen bubbles can also bring the fine slag in the molten slurry to the liquid surface and discharge it with the molten slurry, further reducing the inclusions in the castings. Description of the Drawings

[0025] Figure 1 is the overall structural schematic diagram of the present invention;

[0026] Figure 2 is the structural schematic diagram of the secondary ladle of the present invention;

[0027] Figure 3 is the internal structural schematic diagram of the secondary ladle of the present invention;

[0028] Figure 4 is the structural schematic diagram of the auxiliary slurry discharge plate of the present invention;

[0029] Figure 5 is the structural schematic diagram of the ceramic column of the present invention;

[0030] Figure 6 is of the present invention Figure 5 magnified schematic diagram at position A;

[0031] Figure 7 is the overall front view structural schematic diagram of the present invention;

[0032] Figure 8 is of the present invention Figure 7 magnified schematic diagram at position B;

[0033] Figure 9 is the structural schematic diagram of the initial state of the slurry cut-off plate of the present invention;

[0034] Figure 10 is the structural schematic diagram of the rotated-out state of the auxiliary slurry discharge plate of the present invention;

[0035] Figure 11 is the final structural schematic diagram of the auxiliary slurry discharge plate and the slurry cut-off plate of the present invention;

[0036] Figure 12 is the structural schematic diagram of the assembly of the ladle body and the centrifugal casting machine of the present invention.

[0037] In the figure: 11, centrifugal casting machine; 12, secondary ladle; 13, residual slurry discharge plate; 14, driving wheel; 15, centrifugal inner mold; 2, slurry cut-off mechanism; 21, slurry cut-off plate; 22, tensioned column; 23, limiting groove; 24, winding belt; 25, tensioned column wire; 26, electromagnet; 27, auxiliary slurry discharge plate; 28, flow outlet; 29, rotating column; 201, reset coil spring; 202, wire passing hole; 203, slurry discharge inlet; 3, nitrogen injection mechanism; 31, ceramic column; 32, nitrogen pipe; 33, control valve; 34, blocking column; 35, spring; 36, extrusion head; 41, belt winding wheel; 42, telescopic head; 43, rotating head follower; 44, push plate; 45, tipping plate; 46, tensioned plate wire; 47, bearing plate; 5, ladle body; 52, slurry stirring motor; 53, stirring shaft; 54, stirring middle column. Detailed implementation manners

[0038] Reference will now be made to example embodiments to discuss the subject matter described herein. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples.

[0039] As Figure 1 , Figure 2 and Figure 3 shown, a first aspect of the present invention provides a centrifugal casting device for tin bronze, including a centrifugal casting machine 11. One end of the centrifugal casting machine 11 is provided with a two-way ladle 12 for pouring tin bronze melt. Inside the two-way ladle 12, a slurry-breaking mechanism 2 for separating the tin bronze melt is provided. In the flowing direction of the tin bronze melt in the two-way ladle 12, a nitrogen gas blowing mechanism 3 for introducing nitrogen gas into the melt is provided.

[0040] The slurry-breaking mechanism 2 includes a slurry-breaking plate 21 and a secondary slurry-discharging plate 27. Both the slurry-breaking plate 21 and the secondary slurry-discharging plate 27 are rotatably arranged on the inner wall of the two-way ladle 12. When the melt pouring in the centrifugal casting machine 11 reaches a preset value, the slurry-breaking plate 21 is pulled out by a control member to separate the melt in the two-way ladle 12. The secondary slurry-discharging plate 27 is driven by a driving member to rotate as the liquid level of the melt above the slurry-breaking plate 21 drops.

[0041] The nitrogen gas blowing mechanism 3 includes a ceramic column 31 and a nitrogen supply member. The lower surface of the ceramic column 31 is provided with a plurality of gas injection holes. Before the slurry-breaking plate 21 is pulled out, nitrogen gas is charged into the ceramic column 31 through the nitrogen supply member. The nitrogen gas bubbles ejected from the plurality of gas injection holes flow upward in the melt, bringing the impurities in the melt to the liquid surface of the melt and then being discharged as the secondary slurry-discharging plate 27 is pulled out.

[0042] Through the precise rotation of the slurry-breaking mechanism 2, the amount of tin bronze melt flowing into the centrifugal inner mold 15 can be strictly controlled, ensuring that the melt amount for each casting meets the preset requirements, thereby improving the accuracy and consistency of the castings. During the rotation of the slurry-breaking plate 21, it can effectively prevent the impurities above the melt from entering the centrifugal inner mold 15, ensuring the purity of the castings.

[0043] The nitrogen gas blowing of the nitrogen gas blowing mechanism 3 can effectively remove hydrogen and other gas impurities in the tin bronze melt, improving the purity and quality of the melt. When the nitrogen gas bubbles float and burst in the melt, a strong stirring effect will be generated, which helps to refine the grains in the melt, improving the mechanical properties and surface quality of the castings. The nitrogen gas bubbles can also bring the fine slag in the melt to the liquid surface and be discharged with the melt, further reducing the inclusions in the castings.

[0044] AsFigure 1 , Figure 7 and Figure 8 As shown in Figure 1 , Figure 7 and Figure 8 , a centrifugal inner mold 15 is rotatably arranged inside a centrifugal casting machine 11. A plurality of driving wheels 14 are arranged on the side of the centrifugal inner mold 15. The driving wheels 14 are connected to a motor. The motor drives the driving wheels 14 to rotate. The rotation of the driving wheels 14 drives the centrifugal inner mold 15 to rotate by tangency, so that the tin bronze molten slurry poured into the centrifugal inner mold 15 evenly covers the inner wall of the centrifugal inner mold 15.

[0045] As Figure 2 , Figure 4 , Figure 10 and Figure 12 As shown in Figure 2 , Figure 4 , Figure 10 and Figure 12 , a slurry outlet is provided on one side of the second ladle 12 close to the secondary slurry discharge plate 27. The side close to the slurry outlet is fixedly connected to the ladle body 5. The ladle body 5 and the second ladle 12 are in communication with each other. A residual slurry discharge plate 13 fixedly connected to the second ladle 12 is arranged below the slurry outlet. The residual slurry discharge plate 13 penetrates through the ladle body 5. The ladle body 5 is assembled and connected to the feeding port of the centrifugal casting machine 11. A stirring motor 52 is installed at the bottom of the ladle body 5. A stirring middle column 54 is meshed and connected to the stirring motor 52. Two stirring shafts 53 are arranged on the stirring middle column 54. The stirring middle column 54 is connected to the stirring motor 52 through a gear set, which is convenient for connecting the pipeline for supplying nitrogen.

[0046] The two stirring shafts 53 rotate at a certain speed at the bottom of the ladle. At the same time, nitrogen is introduced through the pipeline. During the process of the nitrogen bubbles floating up and bursting, the gas and fine slag inside the copper liquid will be carried away. The copper liquid needs to be spray-refined for 5 minutes after being discharged from the furnace.

[0047] The present invention uses secondary composite refining, centrifugal casting and heat treatment, including the following steps:

[0048] Step 1: Conduct component optimization design to determine the optimal component range;

[0049] Step 2: Add part of the CuP master alloy for deoxidation refining at the initial stage of melting, and then add tin after deoxidation;

[0050] Step 3: After the component adjustment is qualified, add part of the CuP master alloy for secondary deoxidation refining;

[0051] Step 4: After the copper liquid is poured into the ladle body 5, hydrogen removal refining is carried out by nitrogen gas spraying;

[0052] Step 5: Pour the copper liquid into the centrifugal inner mold 15 for centrifugal casting, and let the casting solidify quickly through water cooling;

[0053] Step 6: Carry out high-temperature annealing treatment on the casting to stabilize the structure and improve the comprehensive performance.

[0054] First, lift the ladle body 5 filled with tin bronze molten slurry to the feeding port position of the centrifugal casting machine 11, and insert the secondary ladle 12 into the feeding port of the centrifugal casting machine 11. The staff needs to first let more tin bronze molten slurry than required flow into the secondary ladle 12, conduct nitrogen injection in the secondary ladle 12 for five minutes for hydrogen removal and refining. Then, under the control of the staff, open the valve between the secondary ladle 12 and the centrifugal inner mold 15, so that the tin bronze molten slurry flows along the secondary ladle 12 into the centrifugal inner mold 15. Drive the driving wheel 14 to rotate through the motor, drive the centrifugal inner mold 15 to rotate at a high speed through the driving wheel 14, and the centrifugal inner mold 15 starts to rotate at a high speed. The tin bronze alloy liquid is evenly distributed on the inner wall of the centrifugal inner mold 15 through centrifugal force. Finally, through the water cooling system or other cooling methods, the centrifugally cast tin bronze casting is quickly cooled and solidified.

[0055] As Figure 3 , Figure 8 and Figure 9 shown, the control part includes an electromagnet 26 fixedly connected to the secondary ladle 12. A pull wire 25 and a pull plate wire 46 are fixedly arranged on the telescopic column of the electromagnet 26. A tension-receiving column 22 is fixedly arranged at the end of the pull wire 25 far from the electromagnet 26. The tension-receiving column 22 penetrates through the wall plate of the secondary ladle 12 and is fixedly connected to the slurry-breaking plate 21, and the slurry-breaking plate 21 and the tension-receiving column 22 form a 90-degree angle.

[0056] A limiting groove 23 is opened on the outer wall of the secondary ladle 12 below the tension-receiving column 22. A wire-passing hole 202 is opened below the limiting groove 23. The pull wire 25 passes through the wire-passing hole 202 and is connected to the tension-receiving column 22, and the pull wire 25 has an inverted V-shaped structure. The limiting groove 23 does not penetrate through the wall plate of the secondary ladle 12.

[0057] A transmission part is arranged at the end of the pull plate wire 46 far from the electromagnet 26 penetrating through the chassis of the centrifugal casting machine 11. The transmission part includes a bearing plate 47. A winding wheel 41 is rotatably arranged inside the bearing plate 47. A following rotating head 43 is fixedly arranged on one side of the driving wheel 14 close to the winding wheel 41. A telescopic head 42 connected in a sliding manner is arranged inside the winding wheel 41. A push plate 44 is fixedly connected to the end of the telescopic head 42 far from the following rotating head 43. A Z-shaped toggle plate 45 is rotatably arranged on the side wall of the bearing plate 47. One end of the toggle plate 45 far from the push plate 44 is fixedly connected to the pull plate wire 46, and one end of the toggle plate 45 close to the push plate 44 is connected to the push plate 44 through a silk thread.

[0058] The slurry inlet of the secondary slurry-discharging plate 27 is a slurry-discharging inlet 203 with an inclined surface, and the slurry outlet of the secondary slurry-discharging plate 27 is a flow outlet 28. Driving parts are connected to both ends of the secondary slurry-discharging plate 27. The driving parts include a rotating column 29. A reset winding spring 201 is fixedly arranged inside the rotating column 29. A winding belt 24 is wound around the outer wall of the rotating column 29, and the end of the winding belt 24 far from the rotating column 29 is connected to the winding wheel 41.

[0059] When the tin bronze melt in the second ladle 12 is subjected to hydrogen removal and refining by nitrogen gas blowing for five minutes, while opening the valve of the second ladle 12, the electromagnet 26 is controlled to work so that the telescopic column retracts. The pull column wire 25 is pulled by the electromagnet 26, and the tensioned column 22 is pulled by the pull column wire 25 to rotate the slurry-breaking plate 21 by 85°, so that the slurry-breaking plate 21 divides the tin bronze melt in the second ladle 12 into upper and lower parts. The amount of tin bronze melt below the slurry-breaking plate 21 just meets the required amount, which is beneficial to reducing the contact of the tin bronze melt below the slurry-breaking plate 21 with air;

[0060] The impurities generated during the hydrogen removal and refining by nitrogen gas blowing of the nitrogen gas blowing mechanism 3 will float in the tin bronze melt above the slurry-breaking plate 21. The blocking of the slurry-breaking plate 21 helps prevent impurities from entering the centrifugal inner mold 15;

[0061] The rotation of the slurry-breaking plate 21 outwards, the opening of the valve of the second ladle 12, and the nitrogen supply member stopping supplying nitrogen to the slurry-breaking plate 21 are carried out simultaneously. Therefore, after the tin bronze melt enters the centrifugal inner mold 15, the centrifugal inner mold 15 starts to rotate;

[0062] When the electromagnet 26 works to retract the telescopic column, the pull plate wire 46 is also pulled by the electromagnet 26 at the same time. The pull plate wire 46 pulls the seesaw 45 to rotate, so that the other end of the seesaw 45 pushes the push plate 44. The telescopic head 42 is pushed out from the other end of the reel 41 through the push plate 44 to contact the follower rotating head 43. While the driving wheel 14 rotates, the reel 41 is driven to rotate, the winding belt 24 is wound, the rotating column 29 is pulled to rotate by the winding belt 24, and the auxiliary slurry-discharging plate 27 is gradually rotated out. At this time, the melt above the slurry-breaking plate 21 flows in through the slurry discharge inlet 203 and the flow outlet 28, and then flows to the ladle body 5 through the residual slurry-discharging plate 13 for recycling;

[0063] Every time the driving wheel 14 rotates one circle, the reel 41 is driven to rotate one circle, thereby driving the auxiliary slurry-discharging plate 27 to rotate out a certain angle until the auxiliary slurry-discharging plate 27 is closely attached to the slurry-breaking plate 21. The telescopic head 42 is a soft colloid. After the auxiliary slurry-discharging plate 27 is closely attached to the slurry-breaking plate 21, the pushing force of the follower rotating head 43 on the telescopic head 42 is greater than the resistance, and the telescopic head 42 bends and will not continue to rotate;

[0064] Finally, the electromagnet 26 stops working, and all steps return to the initial state.

[0065] As Figure 3 、 Figure 5 、 Figure 6 and Figure 11 shown, the nitrogen supply member includes a nitrogen pipe 32 that is internally connected to the ceramic column 31. The intake end of the nitrogen pipe 32 is connected with a control valve 33 through a hose, and the intake end of the control valve 33 is connected to an external nitrogen supply pump body.

[0066] Inside the control valve 33, a blocking column 34 is slidably arranged. Inside the blocking column 34, a spring 35 is fixedly arranged. One end of the blocking column 34 away from the spring 35 is fixedly connected to an extrusion head 36 that penetrates through the blocking column 34.

[0067] After the tin bronze molten slurry is added to the second ladle 12, nitrogen is supplied to the ceramic column 31 through a nitrogen supply pump body. Nitrogen enters and exits the tin bronze molten slurry through a number of air injection holes. By introducing nitrogen, during the process of nitrogen bubbles floating up and bursting, the gas and fine slag inside the copper liquid will be carried away. After the copper liquid is taken out of the furnace, it needs to be spray-refined for 5 minutes.

[0068] The ceramic column 31 can select ceramic columns 31 of different lengths according to actual needs until it extends to the bottom of the second ladle 12. At the same time, the second ladle 12 of different sizes can also be selected according to needs.

[0069] The control valve 33 is installed in the limit groove 23. By rotating the tension-receiving column 22, the extrusion head 36 is extruded, pushing the blocking column 34 to slide to block nitrogen and stop nitrogen supply.

[0070] The second aspect of the present invention provides a method for using a tin bronze centrifugal casting device, including the following steps:

[0071] S1. Lift the ladle body 5 filled with tin bronze molten slurry to the feeding port position of the centrifugal casting machine 11. During the lifting of the ladle body 5, the stirring shaft 53 is driven by the slurry stirring motor 52 to stir, and at the same time, nitrogen is injected into the tin bronze molten slurry through the stirring shaft 53. At the same time, the second ladle 12 is inserted into the feeding port of the centrifugal casting machine 11. At the same time, manually tie the drawbar wire 46 and the winding belt 24. Here, tying means connecting the drawbar wire 46 and the winding belt 24 on the second ladle 12 with the drawbar wire 46 and the winding belt 24 inside the centrifugal casting machine 11.

[0072] Open the communication valve between the second ladle 12 and the ladle body 5, let more tin bronze molten slurry than required flow into the second ladle 12, start the nitrogen injection mechanism 3, and inject nitrogen into the molten slurry through the ceramic column 31 for hydrogen removal and refining.

[0073] S2. After refining is completed, control the electromagnet 26 to work, retract its telescopic column, pull the tension-receiving column 22 through the pull column wire 25, and then drive the slurry-breaking plate 21 to rotate 85°, dividing the molten slurry into upper and lower parts.

[0074] S3. Open the valve between the second ladle 12 and the centrifugal inner mold 15, let the molten slurry flow into the centrifugal inner mold 15, the motor drives the driving wheel 14 to rotate, and then drives the centrifugal inner mold 15 to rotate at a high speed. The molten slurry is evenly distributed on the inner wall of the centrifugal inner mold 15 by centrifugal force.

[0075] S4. While the molten slurry flows into the centrifugal inner mold 15, the molten slurry and impurities above the slurry-breaking plate 21 flow into the residual slurry-breaking plate 13 through the slurry discharge inlet 203 and the flow outlet 28, and finally flow into the ladle body 5 for recovery.

[0076] The above describes the embodiments of this example, but this example is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative rather than restrictive. Under the inspiration of this example, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of this example.

Claims

1. A centrifugal casting device, comprising a centrifugal casting machine (11), and a two-way ladle (12) for pouring tin bronze molten slurry is arranged at one end of the centrifugal casting machine (11), and is characterized in that, An internal slurry-breaking mechanism (2) for separating the tin bronze molten slurry is provided inside the second ladle (12), and a nitrogen injection mechanism (3) for injecting nitrogen into the molten slurry is provided in the flowing direction of the tin bronze molten slurry in the second ladle (12); The slurry-breaking mechanism (2) includes a slurry-breaking plate (21) and a secondary slurry-discharging plate (27). Both the slurry-breaking plate (21) and the secondary slurry-discharging plate (27) are rotatably arranged on the inner wall of the second ladle (12). When the molten slurry in the centrifugal casting machine (11) reaches a preset value during pouring, the slurry-breaking plate (21) is pulled out by a control member to separate the molten slurry in the second ladle (12). The secondary slurry-discharging plate (27) is driven by a driving member to rotate as the liquid level of the molten slurry above the slurry-breaking plate (21) drops; The nitrogen injection mechanism (3) includes a ceramic column (31) and a nitrogen supply member. A plurality of gas injection holes are provided on the lower surface of the ceramic column (31). Before the slurry-breaking plate (21) is pulled out, nitrogen is charged into the ceramic column (31) by the nitrogen supply member, and the nitrogen bubbles ejected from the plurality of gas injection holes flow upward in the molten slurry. After bringing the impurities in the molten slurry to the liquid level of the molten slurry, they are discharged as the secondary slurry-discharging plate (27) is pulled out; The control member includes an electromagnet (26) fixedly connected to the second ladle (12). A pull wire (25) and a pull plate wire (46) are fixedly arranged on the telescopic column of the electromagnet (26). One end of the pull wire (25) away from the electromagnet (26) is fixedly provided with a tension-receiving column (22). The tension-receiving column (22) penetrates through the wall plate of the second ladle (12) and is fixedly connected to the slurry-breaking plate (21), and the slurry-breaking plate (21) and the tension-receiving column (22) form a 90-degree angle; 2. The centrifugal casting device according to claim 1, characterized in that, An internal centrifugal inner mold (15) is rotatably arranged inside the centrifugal casting machine (11). A plurality of driving wheels (14) are arranged on the side of the centrifugal inner mold (15). The driving wheels (14) are connected to a motor. The driving wheels (14) are driven to rotate by the motor, and the centrifugal inner mold (15) is driven to rotate by the tangency of the driving wheels (14) and the centrifugal inner mold (15), so that the tin bronze molten slurry poured into the centrifugal inner mold (15) uniformly covers the inner wall of the centrifugal inner mold (15); 3. The centrifugal casting device according to claim 2, wherein, An outlet is provided on one side of the second ladle (12) close to the secondary slurry-discharging plate (27). The side close to the outlet is fixedly connected to the ladle body (5), and the ladle body (5) and the second ladle (12) are in mutual communication. A residual slurry-discharging plate (13) fixedly connected to the second ladle (12) is arranged below the outlet. The residual slurry-discharging plate (13) penetrates through the ladle body (5). The ladle body (5) is assembled and connected to the feeding port of the centrifugal casting machine (11). A slurry-stirring motor (52) is installed at the bottom of the ladle body (5). A stirring middle column (54) is meshed with the slurry-stirring motor (52), and two stirring shafts (53) are arranged on the stirring middle column (54); 4. The centrifugal casting device according to claim 3, characterized in that, A limiting groove (23) is provided on the outer wall of the second ladle (12) below the tension column (22), and a wire hole (202) is provided below the limiting groove (23). The column pulling wire (25) passes through the wire hole (202) and is connected to the tension column (22), and the column pulling wire (25) is in an inverted V-shaped structure. The limiting groove (23) does not pass through the wall panel of the second ladle (12).

5. A centrifugal casting device according to claim 4, characterized in that, The end of the drawing wire (46) away from the electromagnet (26) passes through the chassis of the centrifugal casting machine (11) and is provided with a transmission member, the transmission member comprising a bearing plate (47), a belt reel (41) is rotatably provided inside the bearing plate (47), a follower head (43) is fixedly provided on the side of the driving wheel (14) close to the belt reel (41), a slidably connected telescopic head (42) is passed through the inside of the belt reel (41), and a push plate (44) is fixedly connected to the telescopic head (42) at one end away from the follower head (43), and a Z-shaped seesaw (45) is rotatably provided on the side wall of the bearing plate (47), the end of the seesaw (45) away from the push plate (44) is fixedly connected to the drawing wire (46), and the end of the seesaw (45) close to the push plate (44) is connected to the push plate (44) through a wire.

6. The centrifugal casting device according to claim 5, characterized in that, The pulp inlet of the auxiliary pulp discharge plate (27) is a pulp discharge inlet (203) on an inclined surface, and the pulp outlet of the auxiliary pulp discharge plate (27) is an outflow outlet (28). Both ends of the auxiliary pulp discharge plate (27) are connected to a driving member, and the driving member comprises a rotating column (29). A return coil spring (201) is fixedly arranged inside the rotating column (29), and a winding belt (24) is wound around the outer wall of the rotating column (29), and the end of the winding belt (24) away from the rotating column (29) is connected to a winding wheel (41).

7. An centrifugal casting device according to claim 1, characterized in that, The nitrogen supply component comprises a nitrogen pipe (32) interconnected with the interior of the ceramic column (31); an air inlet end of the nitrogen pipe (32) is connected to a control valve (33) via a hose; and an air inlet end of the control valve (33) is connected to an external nitrogen supply pump body.

8. A centrifugal casting device according to claim 7, characterized in that, A blocking column (34) is slidably disposed inside the control valve (33), a spring (35) is fixedly disposed inside the blocking column (34), and an extrusion head (36) penetrating the blocking column (34) is fixedly connected to one end of the blocking column (34) away from the spring (35).

9. A method of using the centrifugal casting device according to claim 6, characterized in that, The following steps are involved: S1. A ladle body (5) filled with tin-bronze slurry is hoisted to a feeding port of a centrifugal casting machine (11). During the hoisting of the ladle body (5), a stirring shaft (53) is driven by a stirring motor (52) to stir the tin-bronze slurry. Nitrogen is injected into the tin-bronze slurry through the stirring shaft (53). A second ladle (12) is inserted into the feeding port of the centrifugal casting machine (11). At the same time, the drawing wire (46) and the winding belt (24) are manually tied. Opening the connecting valve between the secondary pouring ladle (12) and the ladle body (5), flowing a tin-bronze slurry greater than the required amount into the secondary pouring ladle (12), starting the nitrogen injection mechanism (3), and injecting nitrogen into the slurry through the ceramic column (31) to perform hydrogen removal and refining; S2. After refining is completed, control the electromagnet (26) to work, retract its telescopic column, pull the tensioned column (22) through the pull column wire (25), and then drive the slurry-breaking plate (21) to rotate by 85°, dividing the molten slurry into upper and lower parts; S3. Open the valve between the second ladle (12) and the centrifugal inner mold (15), so that the molten slurry flows into the centrifugal inner mold (15). The motor drives the driving wheel (14) to rotate, and then drives the centrifugal inner mold (15) to rotate at a high speed. The molten slurry is evenly distributed on the inner wall of the centrifugal inner mold (15) by centrifugal force; S4. While the molten slurry flows into the centrifugal inner mold (15), the molten slurry and impurities above the slurry-breaking plate (21) flow into the residual slurry discharge plate (13) through the slurry discharge inlet (203) and the flow outlet (28), and finally flow into the ladle body (5) for recycling. Then, hoist the ladle body (5) to the position of the next centrifugal casting machine (11).

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