Copper bush centrifugal casting device and method

Abstract

The invention relates to the technical field of copper casting manufacturing, in particular to a copper bush centrifugal casting device and method.The copper bush centrifugal casting device comprises a casting mold, and an annular flange is fixedly connected to an opening in one end of the casting mold; the outer side of the horizontal section of the feeding cylinder is rotationally sleeved with a feeding sleeve through a bearing, and one end of the feeding sleeve penetrates through the middle of the annular flange and extends into an inner cavity of the casting mold. The base is located under the casting mold, and two driving rollers are rotationally installed on the base. The casting mold has the beneficial effects that the outer side of the horizontal section of the feeding cylinder is rotationally sleeved with the feeding sleeve, the outer side of the feeding sleeve is fixedly sleeved with the transmission disc, and when the casting mold rotates, the transmission disc is close to the annular flange and drives the feeding sleeve to gradually rotate under the action of attraction force between the magnet blocks and the magnet pieces; the first spiral blade pushes the metal casting liquid on the horizontal section of the feeding cylinder to flow into an inner cavity of the casting mold, and therefore the problems that the metal casting liquid is accumulated and difficult to clean are effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of copper casting manufacturing, and specifically relates to a copper sleeve centrifugal casting device and method. Background Art

[0002] Centrifugal casting is a technology and method of injecting liquid metal into a rapidly rotating mold, enabling the metal liquid to perform centrifugal motion to fill the mold and form a casting. The centrifugal motion allows the liquid metal to well fill the mold in the radial direction and form a free surface of the casting, and a cylindrical inner hole can be obtained without using a core.

[0003] In the prior art, a Chinese invention with the publication number CN118976877A discloses a horizontal centrifugal casting machine for copper sleeve production. Through the mutual cooperation between the pouring mechanism and the antioxidant mechanism, it prevents the casting liquid from directly contacting the air, avoiding oxidation and cooling, and the splash guard provided improves the safety during feeding. Secondly, it is convenient to transport the casting liquid and control the dosage.

[0004] Currently, when feeding materials, it needs to naturally flow into the casting mold through an external feeding cylinder. However, the part of the feeding cylinder extending into the inner cavity of the mold is a horizontal section, and the metal casting liquid is prone to accumulate here and even cool and solidify, resulting in difficult cleaning and material blockage prone to occur during long-term use. For this reason, the present invention proposes a copper sleeve centrifugal casting device and method to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a copper sleeve centrifugal casting device and method to solve the problem that the metal casting liquid material is prone to accumulate in the horizontal section of the feeding cylinder and is difficult to clean as mentioned in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A copper sleeve centrifugal casting device, comprising:

[0007] A casting mold, one end opening of the casting mold is fixedly connected with an annular flange, and magnet blocks are fixedly inlaid at the surface edge of the annular flange;

[0008] A feeding cylinder, the feeding cylinder is an "L"-shaped hollow structure with a rounded corner at the corner. The outer side of the horizontal section of the feeding cylinder is rotatably sleeved with a feeding sleeve through a bearing. One end of the feeding sleeve passes through the middle of the annular flange and extends into the inner cavity of the casting mold. A transmission disk is fixedly sleeved on the outer side of the feeding sleeve, and magnet pieces corresponding to the magnet blocks are fixed on the surface of the transmission disk. A first spiral blade is fixedly arranged on the inner wall of the feeding sleeve;

[0009] The base is located directly below the casting mold. Two driving rollers are rotatably installed on the base. The two driving rollers are respectively located on both sides of the casting mold and support the casting mold. A telescopic member is fixedly installed on the surface of the base, and the telescopic member drives the feeding cylinder to horizontally slide along the axial direction of the casting mold.

[0010] Preferably, a feeding hopper is arranged at the upper end of the feeding cylinder. A hollow shaft rod is fixedly arranged in the inner cavity of the horizontal section of the feeding cylinder. A support disk is fixedly sleeved on the outer side of one end of the hollow shaft rod. One end inner wall of the feeding sleeve is fixedly connected with a support ring. The support ring is movably sleeved on the outer side of the hollow shaft rod and is in contact with the support disk. A track ring is fixedly arranged on the side surface of the support ring, and a wavy concave groove is formed on the surface of the track ring. A rolling body corresponding to the concave groove is movably inlaid on the surface of the support disk. The rolling body is pressed by a return spring and protrudes from the surface of the support disk. A feeding port is formed in one end inner wall of the feeding sleeve, and the feeding port and the support disk are respectively located on both sides of the support ring.

[0011] Preferably, a friction ring is arranged in contact with the side surface of the transmission disk, and a wear-resistant layer is arranged on one side surface of the friction ring. A ring-shaped frame is arranged on the other side of the friction ring. The ring-shaped frame is fixedly connected with the feeding cylinder through a connecting frame. One end of the connecting frame is fixed with a side pressing plate. A pressing plate is arranged on the side surface of the ring-shaped frame. The pressing plate and the side pressing plate are fixedly connected by bolts, and the bolts movably penetrate through the ring-shaped frame. An adjusting bolt is arranged through the surface of the ring-shaped frame by threads. One end of the adjusting bolt is fixed with a circular boss, and the circular boss is rotatably installed inside the friction ring. A receiving groove is formed on the end surface of the circular boss, and a pressing spring is fixedly installed in the inner cavity of the receiving groove. The other end of the adjusting bolt is fixed with a knob.

[0012] Preferably, a gas return cylinder is fixedly arranged at one end of the feeding sleeve, and the gas return cylinder is in the shape of a hollow frustum. A second spiral blade is fixedly arranged on the inner wall of the gas return cylinder, and the rotation direction of the second spiral blade is opposite to that of the first spiral blade. A porous plate is fixedly arranged on the inner wall of the opening end of the gas return cylinder, and the opening end forms a flared bell mouth. Both ends of the hollow shaft rod are provided with openings and are respectively communicated with the inner cavity of the gas return cylinder and the outside. A limiting ring is fixedly arranged on the inner wall of the other end of the feeding sleeve, and the limiting ring is in contact with the end surface of the horizontal section of the feeding cylinder. The cross section of the limiting ring is in the shape of a right trapezoid.

[0013] Preferably, a slide rail plate is fixedly arranged on the surface of the base. A limiting chute and a scale are formed on the surface of the slide rail plate. A feeding frame is fixedly arranged on the outside of the feeding cylinder. A limiting sliding seat is fixedly arranged at the lower end of the feeding frame. The limiting sliding seat is slidably installed in the inner cavity of the limiting chute and is adapted to it. A reinforcing plate is fixedly arranged in the middle of the feeding frame. The telescopic member is a cylinder, and the movable end of the telescopic member is fixedly connected with the reinforcing plate.

[0014] A copper sleeve centrifugal casting method uses the above-mentioned copper sleeve centrifugal casting device, and specifically includes the following steps:

[0015] Step 1, adjust the friction force between the friction ring and the driving disk;

[0016] Step 2, start the driving roller to drive the casting mold to rotate, move the feeding cylinder and extend one end of the feeding sleeve into the inner cavity of the casting mold;

[0017] Step 3, pour the metal casting liquid into the inner cavity of the feeding hopper, so that the metal casting liquid enters the inner cavity of the casting mold for centrifugal casting.

[0018] Preferably, in the said Step 1, by turning the adjusting bolt to drive the adjusting bolt to move along its own length direction, the adjusting bolt pushes the friction ring close to the driving disk and presses it against the driving disk through the circular boss.

[0019] Preferably, in the said Step 2, the controller controls the telescopic member to contract, and drives the feeding cylinder and the feeding sleeve to move close to the casting mold until one end of the feeding sleeve extends into the inner cavity of the casting mold. At this time, the driving disk approaches the annular flange, and the annular flange rotates synchronously with the casting mold. The magnet block and the magnet piece attract each other by magnetic force and generate a torsion force on the driving disk to offset the friction force generated by the friction ring on the driving disk. When the torsion force brought by the magnetic force on the driving disk is greater than the friction force generated by the friction ring on it, the driving disk drives the feeding sleeve to gradually rotate.

[0020] Preferably, in the said Step 3, the metal casting liquid flows to the horizontal section of the feeding cylinder under the action of gravity and enters the inner cavity of the feeding sleeve. When the feeding sleeve rotates, the spiral blades generate a thrust on the metal casting liquid to make it flow towards the feeding port, and are thrown out from the inner cavity of the feeding port to the inner cavity of the casting mold under the action of centrifugal force. The high-speed rotation of the casting mold can realize centrifugal casting of the metal casting liquid.

[0021] Preferably, in the said Step 3, the metal casting liquid enters the inner cavity of the casting mold, and the hot air in the inner cavity of the casting mold is discharged outwards. Since the spiral blades II on the inner wall of the gas return cylinder drive the air to flow when rotating, the hot air in the inner cavity of the casting mold is discharged to the outside in turn along the inner cavity of the gas return cylinder and the inner cavity of the hollow shaft rod. When the hot air flows in the inner cavity of the hollow shaft rod, it avoids the temperature in the inner cavity of the feeding cylinder being too low and causing the metal casting liquid to cool and solidify.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] In the present invention, a feeding sleeve is rotatably sleeved outside the horizontal section of the feeding cylinder. A transmission disc is fixedly sleeved outside the feeding sleeve, and magnet pieces are fixed at the edge of the surface of the transmission disc. A first spiral blade is fixed to the inner wall of the transmission disc. An annular flange is fixedly arranged at the opening end of the casting mold, and magnet blocks corresponding to the magnet pieces are fixedly inlaid on the surface of the annular flange. When the casting mold rotates, the feeding cylinder is moved and the feeding sleeve is extended into the inner cavity of the casting mold. At this time, the transmission disc approaches the annular flange and drives the feeding sleeve to gradually rotate under the attraction between the magnet blocks and the magnet pieces. When the feeding sleeve rotates, the first spiral blade pushes the metal casting liquid in the horizontal section of the feeding cylinder to flow into the inner cavity of the casting mold, thereby effectively avoiding the problems of accumulation and difficult cleaning of the metal casting liquid. Description of the Drawings

[0024] Figure 1 Schematic three-dimensional view of the overall structure of the present invention;

[0025] Figure 2 Schematic cross-sectional view of the overall structure of the present invention;

[0026] Figure 3 Schematic three-dimensional view of the structure of the casting mold of the present invention;

[0027] Figure 4 Schematic internal view of the structure of the feeding sleeve of the present invention;

[0028] Figure 5 Schematic connection view of the structures of the feeding cylinder and the feeding sleeve of the present invention;

[0029] Figure 6 Schematic exploded view of the structure of the feeding cylinder of the present invention;

[0030] Figure 7 For the present invention Figure 4 Enlarged schematic view of the structure at A in;

[0031] Figure 8 Schematic three-dimensional view of the structure of the track ring of the present invention;

[0032] Figure 9 Schematic internal view of the structures of the hollow shaft rod and the support disc of the present invention;

[0033] Figure 10 Schematic three-dimensional view of the structure of the adjusting bolt of the present invention;

[0034] Figure 11 For the present invention Figure 4 Enlarged schematic view of the structure at B in.

[0035] In the figure: 1, casting mold; 11, annular flange; 12, magnet block; 2, feeding cylinder; 21, feeding hopper; 22, annular frame; 221, pressing plate; 23, connecting frame; 231, side pressing plate; 24, shaft rod; 25, support disc; 251, rolling element; 252, return spring; 26, feeding frame; 261, reinforcing plate; 262, limiting sliding seat; 3, feeding sleeve; 31, driving disc; 311, magnet sheet; 32, first spiral blade; 33, feeding port; 34, support ring; 341, track ring; 342, concave groove; 35, gas return cylinder; 351, second spiral blade; 352, perforated plate; 353, bell mouth; 36, limiting ring; 4, friction ring; 41, wear-resistant layer; 42, adjusting bolt; 421, circular boss; 422, receiving groove; 423, pressing spring; 424, knob; 5, bearing; 6, telescopic member; 7, slide rail plate; 71, limiting slide groove; 72, scale; 8, base; 9, driving roller. Specific embodiments

[0036] In order to clearly and completely describe the objectives, technical solutions of the present invention and make the advantages more clearly understood, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all the embodiments, and are only used to explain the embodiments of the present invention, not to limit 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.

[0037] Please refer to Figures 1 to 11 , the present invention provides a technical solution:

[0038] Embodiment 1, a copper sleeve centrifugal casting device, comprising: a casting mold 1, a feeding cylinder 2 and a base 8.

[0039] Specifically, an annular flange 11 is fixedly connected to the open end of the casting mold 1, and magnet blocks 12 are fixedly embedded at the surface edge of the annular flange 11, as Figure 3As shown, the annular flange 11 is fixedly connected to the casting mold 1 by bolts and nuts. The inner diameter of the annular flange 11 is smaller than the inner diameter of the casting mold 1. When the metal casting liquid is centrifugally cast in the inner cavity of the casting mold 1 as the casting mold 1 rotates, the metal casting liquid is close to the inner wall of the casting mold 1, so the annular flange 11 can prevent the metal casting liquid from leaking from the open end of the casting mold 1. In addition, it should be noted that a sealing plate with the same function as the annular flange 11 is also required to be provided at the opening of the other end of the casting mold 1 to prevent the metal casting liquid from leaking. The sealing plate can be an annular structure or a circular structure. The sealing plate is connected to the casting mold 1 using existing known locking structures such as buckles and bolts. When the metal casting liquid of the copper sleeve is centrifugally cast in the inner cavity of the casting mold 1, the sealing plate at the other end of the casting mold 1 is removed, and the copper sleeve can be pulled out of the inner cavity of the casting mold 1 using corresponding tools.

[0040] Secondly, the feeding tube 2 is an "L"-shaped hollow structure with rounded corners, such as Figure 2As shown, the metal casting liquid is filled from the upper end of the feeding cylinder 2 and flows out from the horizontal section of the feeding cylinder 2. A feeding sleeve 3 is rotatably sleeved outside the horizontal section of the feeding cylinder 2 through a bearing 5. One end of the feeding sleeve 3 passes through the middle of the annular flange 11 and extends into the inner cavity of the casting mold 1. The metal casting liquid can flow along the inner cavity of the feeding sleeve 3 and finally enter the inner cavity of the casting mold 1. The feeding sleeve 3 can only rotate outside the horizontal section of the feeding cylinder 2 and will not be separated from the feeding cylinder 2. A driving disk 31 is fixedly sleeved outside the feeding sleeve 3, and a magnet sheet 311 corresponding to the magnet block 12 is fixed on the surface of the driving disk 31. When the driving disk 31 approaches the annular flange 11, the magnet sheet 311 and the magnet block 12 attract each other. Since the annular flange 11 rotates synchronously with the casting mold 1, the driving disk 31 can gradually rotate after approaching the annular flange 11. The maximum rotation speed of the driving disk 31 can be consistent with that of the casting mold 1. A first spiral blade 32 is fixedly arranged on the inner wall of the feeding sleeve 3. When the feeding sleeve 3 rotates, the first spiral blade 32 can generate a thrust on the metal casting liquid in the inner cavity of the feeding sleeve 3, so that the metal casting liquid flows along the inner cavity of the feeding sleeve 3 into the inner cavity of the casting mold 1. And because the metal casting liquid has viscosity and there is a viscous force between the metal casting liquids, the metal casting liquid flowing in the inner cavity of the feeding sleeve 3 can also pull the metal casting liquid in the horizontal section of the inner cavity of the feeding cylinder 2 into the inner cavity of the feeding sleeve 3. Compared with the traditional structure that relies on the gravity of the metal casting liquid to flow into the inner cavity of the casting mold 1, the feeding cylinder 2 of this device cooperates with the rotating feeding sleeve 3, can quickly send the metal casting liquid into the inner cavity of the casting mold 1, and reduce the possibility of the metal casting liquid accumulating in the horizontal section of the inner cavity of the feeding cylinder 2. In addition, since this device only needs to extend one end of the feeding sleeve 3 into the inner cavity of the feeding cylinder 2 to ensure the normal filling of the metal casting liquid, the horizontal section of the feeding cylinder 2 can be set shorter and only needs to be rotatably connected to the other end of the feeding sleeve 3, thus further avoiding the situation that the metal casting liquid accumulates, cools and solidifies, and is difficult to clean in the horizontal section of the inner cavity of the feeding cylinder 2;

[0041] Moreover, the base 8 is located directly below the casting mold 1, and two driving rollers 9 are rotatably installed on the base 8. The two driving rollers 9 are respectively located on both sides of the casting mold 1 and support the casting mold 1. The driving rollers 9 are driven to rotate by an external motor. The casting mold 1 is located between the two driving rollers 9 under its own gravity and is supported by the driving rollers 9. Therefore, when the driving rollers 9 rotate, they can drive the casting mold 1 to rotate. In order to prevent the casting mold 1 and the driving rollers 9 from being misaligned and displaced in the axial direction, this device can also set an annular protrusion on the casting mold 1 and open an annular groove corresponding to the annular protrusion on the driving roller 9. The above are all existing known technologies and will not be elaborated here. A telescopic member 6 is fixedly installed on the surface of the base 8, and the telescopic member 6 drives the feeding cylinder 2 to horizontally slide along the axial direction of the casting mold 1.

[0042] To support one end of the feeding sleeve 3, the present application further has a feeding hopper 21 provided at the upper end of the feeding cylinder 2, which is convenient for the staff to pour the metal casting liquid into the inner cavity of the feeding cylinder 2. A hollow shaft rod 24 is fixedly arranged in the inner cavity of the horizontal section of the feeding cylinder 2. One end of the hollow shaft rod 24 extends out of the inner cavity of the horizontal section of the feeding cylinder 2 and extends into the inner cavity of the feeding sleeve 3. A support disk 25 is fixedly sleeved on the outer side of one end of the hollow shaft rod 24. A support ring 34 is fixedly connected to the inner wall of one end of the feeding sleeve 3. The support ring 34 is movably sleeved on the outer side of the hollow shaft rod 24 and is in contact with the support disk 25. Combining Figure 2 、 Figure 4 and Figure 6 as shown, one end of the hollow shaft rod 24 can support the support ring 34, and the support disk 25 can support the inner wall of one end of the feeding sleeve 3. Therefore, the feeding sleeve 3 can be more stably rotatably connected to the feeding cylinder 2 and will not cause one end to drop due to too much metal casting liquid in its inner cavity. A track ring 341 is fixedly arranged on the side surface of the support ring 34, and a wavy recessed groove 342 is formed on the surface of the track ring 341. A rolling body 251 corresponding to the recessed groove 342 is movably embedded on the surface of the support disk 25. When the feeding sleeve 3 rotates, relative rotation occurs between the support ring 34 and the rolling body 251, and the rolling body 251 will roll on the surface of the track ring 341. Since the recessed groove 342 is wavy, the rolling body 251 will generate a certain vibration in the length direction of the hollow shaft rod 24. This vibration is transmitted to the hollow shaft rod 24, and the metal casting liquid adhering to the surface of the hollow shaft rod 24 can be shaken off, preventing the metal casting liquid from adhering to the surface of the hollow shaft rod 24 for a long time and finally cooling and solidifying, which is difficult to clean. In addition, the rolling body 251 is pressed by a return spring 252 and protrudes from the surface of the support disk 25. The return spring 252 applies an elastic force to the rolling body 251 to ensure that the rolling body 251 can always roll in the recessed groove 342, thereby continuously generating vibration. A feeding port 33 is formed in the inner wall of one end of the feeding sleeve 3, and the feeding port 33 and the support disk 25 are respectively located on both sides of the support ring 34. The setting of the feeding port 33 ensures that the metal casting liquid in the inner cavity of the feeding sleeve 3 can be timely thrown into the inner cavity of the casting mold 1 from here.

[0043] To adjust the pressure generated by the friction ring 4 on the transmission disk 31, the present application further has a friction ring 4 attached to the side surface of the transmission disk 31, and a wear-resistant layer 41 is provided on one side surface of the friction ring 4. Combining Figure 4 and Figure 6As can be seen, when the friction ring 4 approaches the driving disk 31 and presses it, a frictional force can be generated between the wear-resistant layer 41 and the driving disk 31, thereby preventing the driving disk 31 from rotating easily. Only when one end of the feeding sleeve 3 extends into the inner cavity of the casting mold 1 and the driving disk 31 approaches the annular flange 11, the driving disk 31 will gradually rotate under the mutual attraction of the magnet block 12 and the magnet piece 311. On the other side of the friction ring 4, there is an annular frame 22. The annular frame 22 is fixedly connected to the feeding cylinder 2 through a connecting frame 23. One end of the connecting frame 23 is fixed with a side pressing plate 231. A pressing plate 221 is arranged on the side surface of the annular frame 22. The pressing plate 221 and the side pressing plate 231 are fixedly connected by bolts, and the bolts movably penetrate through the annular frame 22, as Figure 6 As can be seen, the annular frame 22 can be fixed between the side pressing plate 231 and the pressing plate 221, that is, fixedly connected to the connecting frame 23. And an adjusting bolt 42 is arranged on the surface of the annular frame 22 through threaded penetration. One end of the adjusting bolt 42 is fixed with a circular boss 421, and the circular boss 421 is rotatably installed inside the friction ring 4. The circular boss 421 can only rotate relative to the friction ring 4, but will not have a relative position. To ensure the connection between the friction ring 4 and the circular boss 421, a sleeve structure corresponding to the circular boss 421 is fixed on the surface of the friction ring 4. The sleeve structure is movably sleeved outside the circular boss 421. This is the prior art and will not be elaborated here. A receiving groove 422 is opened on the end face of the circular boss 421, and a compression spring 423 is fixedly installed in the inner cavity of the receiving groove 422. The other end of the adjusting bolt 42 is fixed with a knob 424, as Figure 6 and Figure 10 As can be seen, when the staff twists the knob 424, the threaded connection structure between the adjusting bolt 42 and the annular frame 22 can drive the adjusting bolt 42 to move along its own length direction, thereby driving the friction ring 4 to move. Combining with Figure 4 As can be seen, when the friction ring 4 moves closer to the driving disk 31 until it fits with the driving disk 31, the friction ring 4 can no longer move. At this time, when the adjusting bolt 42 is continued to be twisted, the compression spring 423 will be compressed, and the elastic force generated by the compression spring 423 returning to its deformation acts on the friction ring 4 to increase the pressure exerted by the friction ring 4 on the feeding sleeve 3.

[0044] In order to maintain the temperature of the hollow shaft rod 24 itself and prevent the metal casting liquid from cooling too quickly, the present application also has a gas return cylinder 35 fixedly arranged at one end of the feeding sleeve 3, and the gas return cylinder 35 is in the shape of a hollow frustum. A second spiral blade 351 is fixedly arranged on the inner wall of the gas return cylinder 35, and the rotation direction of the second spiral blade 351 is opposite to that of the first spiral blade 32, as Figure 4 and Figure 7As can be seen, when the feeding sleeve 3 rotates, the second spiral blade 351 can drive the air flow, and the air flow direction is opposite to the flow direction of the metal casting liquid in the inner cavity of the feeding sleeve 3, that is, the second spiral blade 351 can suck the hot air in the inner cavity of the casting mold 1 into the inner cavity of the hollow shaft rod 24, and then discharge it to the outside. A porous plate 352 is fixed on the inner wall of one end opening of the gas return cylinder 35, and the opening end forms a flared bell mouth 353. The settings of the porous plate 352 and the bell mouth 353 are both used to reduce the possibility of the metal casting liquid entering the inner cavity of the gas return cylinder 35, but do not affect the normal flow and discharge of the hot air. Openings are provided at both ends of the hollow shaft rod 24 and are respectively communicated with the inner cavity of the gas return cylinder 35 and the outside, so as to facilitate the hot air in the inner cavity of the casting mold 1 to be discharged to the outside along the inner cavity of the hollow shaft rod 24. When the hot air flows in the inner cavity of the hollow shaft rod 24, the hot air can also maintain the temperature of the surface of the hollow shaft rod 24, avoiding the metal casting liquid in the inner cavity of the feeding cylinder 2 from cooling and solidifying too quickly due to the rapid temperature drop. A limiting ring 36 is fixed on the inner wall of the other end of the feeding sleeve 3, and the limiting ring 36 fits with the end face of the horizontal section of the feeding cylinder 2. As Figure 11 and Figure 2 shown, the end face of the horizontal section of the feeding cylinder 2 abuts against the side face of the limiting ring 36. By setting the cross section of the limiting ring 36 to be a right trapezoid structure, it is ensured that the metal casting liquid in the inner cavity of the feeding cylinder 2 can smoothly flow into the inner cavity of the feeding sleeve 3, and the metal casting liquid is prevented from seeping into the gap between the feeding cylinder 2 and the feeding sleeve 3.

[0045] In order to drive the feeding cylinder 2 to move, the present application also has a slide rail plate 7 fixed on the surface of the base 8. A limiting chute 71 and a scale 72 are provided on the surface of the slide rail plate 7. A feeding frame 26 is fixed on the outside of the feeding cylinder 2. A limiting sliding seat 262 is fixed at the lower end of the feeding frame 26. The limiting sliding seat 262 is slidably installed in the inner cavity of the limiting chute 71 and is adapted to it. A reinforcing plate 261 is fixed in the middle of the feeding frame 26. The telescopic member 6 is a cylinder, and the movable end of the telescopic member 6 is fixedly connected to the reinforcing plate 261. As Figure 5 and Figure 3 shown, the cooperation between the limiting chute 71 and the limiting sliding seat 262 can be used to guide the movement of the feeding cylinder 2, ensuring that the feeding cylinder 2 and the feeding sleeve 3 can only move horizontally along the axial direction of the feeding sleeve 3, thereby avoiding collision between the feeding sleeve 3 and the casting mold 1 during the process of the feeding sleeve 3 extending into the inner cavity of the casting mold 1. The setting of the scale 72 can facilitate the staff to observe the distance between the transmission disc 31 and the annular flange 11. The setting of the telescopic member 6 is mainly used to provide power for the movement of the feeding cylinder 2. The telescopic member 6 can also be an existing known structure such as an oil cylinder or an electric push rod.

[0046] The present invention also discloses a copper sleeve centrifugal casting method, which uses the above-mentioned copper sleeve centrifugal casting device, and specifically includes the following steps:

[0047] Step 1: Adjust the frictional force between the friction ring 4 and the transmission disk 31.

[0048] Step 2: Start the driving roller 9 to drive the casting mold 1 to rotate, move the feeding cylinder 2 and insert one end of the feeding sleeve 3 into the inner cavity of the casting mold 1.

[0049] Step 3: Pour the metal casting liquid into the inner cavity of the feeding hopper 21, so that the metal casting liquid enters the inner cavity of the casting mold 1 for centrifugal casting.

[0050] In Step 1, by turning the adjusting bolt 42, the adjusting bolt 42 moves along its own length direction. The adjusting bolt 42 pushes the friction ring 4 close to the transmission disk 31 through the circular boss 421 and presses it against the transmission disk 31.

[0051] In Step 2, the controller controls the telescopic member 6 to contract, and drives the feeding cylinder 2 and the feeding sleeve 3 to move close to the casting mold 1 until one end of the feeding sleeve 3 enters the inner cavity of the casting mold 1. At this time, the transmission disk 31 approaches the annular flange 11, and the annular flange 11 rotates synchronously with the casting mold 1. The magnet block 12 and the magnet piece 311 attract each other by magnetic force and generate a torque on the transmission disk 31 to offset the frictional force generated by the friction ring 4 on the transmission disk 31. When the torque brought by the magnetic force on the transmission disk 31 is greater than the frictional force generated by the friction ring 4 on it, the transmission disk 31 drives the feeding sleeve 3 to gradually rotate.

[0052] In Step 3, the metal casting liquid flows to the horizontal section of the feeding cylinder 2 under the action of gravity and enters the inner cavity of the feeding sleeve 3. When the feeding sleeve 3 rotates, the first spiral blade 32 generates a thrust on the metal casting liquid to make it flow towards the feeding port 33 and is thrown out from the inner cavity of the feeding port 33 into the inner cavity of the casting mold 1 under the action of centrifugal force. The high-speed rotation of the casting mold 1 can realize centrifugal casting of the metal casting liquid. In addition, when the metal casting liquid enters the inner cavity of the casting mold 1, the hot air in the inner cavity of the casting mold 1 is discharged outwards. Since the second spiral blade 351 on the inner wall of the gas return cylinder 35 drives the air flow when rotating, the hot air in the inner cavity of the casting mold 1 is discharged to the outside in turn along the inner cavity of the gas return cylinder 35 and the inner cavity of the hollow shaft rod 24. When the hot air flows in the inner cavity of the hollow shaft rod 24, it prevents the temperature in the inner cavity of the feeding cylinder 2 from being too low and causing the metal casting liquid to cool and solidify.

[0053] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal casting device for a copper bushing, characterized in that: Including: A casting mold (1), at one end opening of the casting mold (1), an annular flange (11) is fixedly connected, and magnet blocks (12) are fixedly inlaid at the surface edge of the annular flange (11); A feeding cylinder (2), the feeding cylinder (2) is an "L"-shaped hollow structure and the corner is rounded. The outer side of the horizontal section of the feeding cylinder (2) is rotatably sleeved with a feeding sleeve (3) through a bearing (5). One end of the feeding sleeve (3) passes through the middle of the annular flange (11) and extends into the inner cavity of the casting mold (1). A transmission disc (31) is fixedly sleeved on the outer side of the feeding sleeve (3), and magnet sheets (311) corresponding to the magnet blocks (12) are fixed on the surface of the transmission disc (31). A first spiral blade (32) is fixedly arranged on the inner wall of the feeding sleeve (3); A base (8), the base (8) is located directly below the casting mold (1), and two driving rollers (9) are rotatably installed on the base (8). The two driving rollers (9) are respectively located on both sides of the casting mold (1) to support the casting mold (1). A telescopic member (6) is fixedly installed on the surface of the base (8), and the telescopic member (6) drives the feeding cylinder (2) to horizontally slide along the axial direction of the casting mold (1).

2. A copper sleeve centrifugal casting device according to claim 1, characterized in that: A feeding hopper (21) is arranged at the upper end of the feeding cylinder (2). A hollow shaft rod (24) is fixedly arranged in the inner cavity of the horizontal section of the feeding cylinder (2). A support disc (25) is fixedly sleeved on the outer side of one end of the hollow shaft rod (24). One end inner wall of the feeding sleeve (3) is fixedly connected with a support ring (34). The support ring (34) is movably sleeved on the outer side of the hollow shaft rod (24) and is in contact with the support disc (25). A track ring (341) is fixedly arranged on the side surface of the support ring (34), and a wavy recessed groove (342) is formed on the surface of the track ring (341). Rolling bodies (251) corresponding to the recessed groove (342) are movably inlaid on the surface of the support disc (25). The rolling bodies (251) are pressed by a return spring (252) and protrude from the surface of the support disc (25). A feeding port (33) is formed in the inner wall of one end of the feeding sleeve (3), and the feeding port (33) and the support disc (25) are respectively located on both sides of the support ring (34).

3. A copper bushing centrifugal casting device according to claim 2, characterized in that: A friction ring (4) is attached to the side surface of the driving disk (31), and a wear-resistant layer (41) is provided on one side surface of the friction ring (4). An annular frame (22) is provided on the other side of the friction ring (4). The annular frame (22) is fixedly connected to the feeding cylinder (2) through a connecting frame (23). One end of the connecting frame (23) is fixed with a side pressing plate (231). A pressing plate (221) is provided on the side surface of the annular frame (22). The pressing plate (221) and the side pressing plate (231) are fixedly connected by bolts, and the bolts pass through the annular frame (22) movably. An adjusting bolt (42) is arranged on the surface of the annular frame (22) through threads. One end of the adjusting bolt (42) is fixed with a circular boss (421), and the circular boss (421) is rotatably installed inside the friction ring (4). A receiving groove (422) is formed on the end face of the circular boss (421), and a pressing spring (423) is fixedly installed in the inner cavity of the receiving groove (422). The other end of the adjusting bolt (42) is fixed with a knob (424).

4. A copper sleeve centrifugal casting device according to claim 3, characterized in that: One end of the feeding sleeve (3) is fixedly provided with a gas return cylinder (35), and the gas return cylinder (35) is in the shape of a hollow frustum. A second spiral blade (351) is fixedly arranged on the inner wall of the gas return cylinder (35), and the spiral direction of the second spiral blade (351) is opposite to that of the first spiral blade (32). A porous plate (352) is fixedly arranged on the inner wall of the opening end of the gas return cylinder (35), and the opening end forms a flared trumpet mouth (353). Both ends of the hollow shaft rod (24) are provided with openings and are respectively communicated with the inner cavity of the gas return cylinder (35) and the outside. A limiting ring (36) is fixedly arranged on the inner wall of the other end of the feeding sleeve (3), and the limiting ring (36) is attached to the end face of the horizontal section of the feeding cylinder (2). The cross section of the limiting ring (36) is in the shape of a right trapezoid structure.

5. A centrifugal casting device for copper sleeves according to claim 4, characterized in that: A slide rail plate (7) is fixed on the surface of the base (8). A limiting chute (71) and a scale (72) are formed on the surface of the slide rail plate (7). A feeding frame (26) is fixed on the outside of the feeding cylinder (2). A limiting sliding seat (262) is fixed at the lower end of the feeding frame (26). The limiting sliding seat (262) is slidably installed in the inner cavity of the limiting chute (71) and is adapted to it. A reinforcing plate (261) is fixed in the middle of the feeding frame (26). The telescopic member (6) is a cylinder, and the movable end of the telescopic member (6) is fixedly connected to the reinforcing plate (261).

6. A centrifugal casting method for copper sleeves, characterized in that: Using the copper sleeve centrifugal casting device described in claim 5, specifically includes the following steps: Step 1, adjust the friction force between the friction ring (4) and the driving disk (31); Step 2, start the driving roller (9) to drive the casting mold (1) to rotate, move the feeding cylinder (2) and insert one end of the feeding sleeve (3) into the inner cavity of the casting mold (1); Step 3, pour the metal casting liquid into the inner cavity of the feeding hopper (21) to make the metal casting liquid enter the inner cavity of the casting mold (1) for centrifugal casting.

7. A centrifugal casting method for a copper bushing according to claim 6, characterized in that: In the first step, by turning the adjusting bolt (42), the adjusting bolt (42) is driven to move along its own length direction. The adjusting bolt (42) pushes the friction ring (4) close to the driving disk (31) through the circular boss (421) and presses it tightly against the driving disk (31).

8. A centrifugal casting method for a copper bushing according to claim 7, characterized in that: In the second step, the controller controls the telescopic member (6) to contract, and drives the feeding cylinder (2) and the feeding sleeve (3) to move close to the casting mold (1) until one end of the feeding sleeve (3) extends into the inner cavity of the casting mold (1). At this time, the driving disk (31) approaches the annular flange (11), and the annular flange (11) rotates synchronously with the casting mold (1). The magnet block (12) and the magnet sheet (311) attract each other by magnetic force and generate a torque on the driving disk (31) to offset the frictional force generated by the friction ring (4) on the driving disk (31). When the torque brought by the magnetic force on the driving disk (31) is greater than the frictional force generated by the friction ring (4) on it, the driving disk (31) drives the feeding sleeve (3) to gradually rotate.

9. A centrifugal casting method for a copper bushing according to claim 8, characterized in that: In the third step, the metal casting liquid flows to the horizontal section of the feeding cylinder (2) under the action of gravity and enters the inner cavity of the feeding sleeve (3). When the feeding sleeve (3) rotates, the first spiral blade (32) generates a thrust on the metal casting liquid to make it flow towards the feeding port (33) and is thrown out from the inner cavity of the feeding port (33) to the inner cavity of the casting mold (1) under the action of centrifugal force. The casting mold (1) rotates at a high speed to achieve centrifugal casting of the metal casting liquid.

10. A centrifugal casting method for a copper bushing according to claim 9, characterized in that: In the third step, the metal casting liquid enters the inner cavity of the casting mold (1), and the hot air in the inner cavity of the casting mold (1) is discharged outwards. Since the second spiral blade (351) on the inner wall of the gas return cylinder (35) drives the air flow when rotating, the hot air in the inner cavity of the casting mold (1) is discharged to the outside along the inner cavity of the gas return cylinder (35) and the inner cavity of the hollow shaft rod (24) in sequence. When the hot air flows in the inner cavity of the hollow shaft rod (24), it prevents the temperature in the inner cavity of the feeding cylinder (2) from being too low and causing the metal casting liquid to cool and solidify.

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