A copper bush centrifugal casting device and method

Abstract

The application relates to the technical field of copper casting manufacturing, in particular to a copper sleeve centrifugal casting device and method, which comprises a casting mold, one end of the casting mold is fixedly connected with a ring-shaped flange at an opening, a feeding sleeve is rotatably sleeved on the outer side of the horizontal section of a feeding cylinder through a bearing, one end of the feeding sleeve penetrates the middle part of the ring-shaped flange and extends into the inner cavity of the casting mold, a base is located directly below the casting mold, and two driving rollers are rotatably installed on the base. The beneficial effects are as follows: the feeding sleeve is rotatably sleeved on the outer side of the horizontal section of the feeding cylinder, a transmission disc is fixedly sleeved on the outer side of the feeding sleeve, when the casting mold rotates, the transmission disc approaches the ring-shaped flange and is driven to gradually rotate under the attraction between the magnet blocks and the magnet pieces, the spiral blades push the metal casting liquid of the horizontal section of the feeding cylinder to flow into the inner cavity of the casting mold, and therefore the problems of metal casting liquid accumulation and difficult cleaning are effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of copper casting manufacturing technology, specifically to a centrifugal casting apparatus and method for copper sleeves. Background Technology

[0002] Centrifugal casting is a technique and method that involves injecting liquid metal into a high-speed rotating mold, causing the molten metal to undergo centrifugal motion to fill the mold and form a casting. The centrifugal motion allows the liquid metal to fill the mold well in the radial direction and form a free surface of the casting, achieving a cylindrical inner hole without a core.

[0003] In the prior art, Chinese invention with publication number CN118976877A discloses a horizontal centrifugal casting machine for copper sleeve production. Through the cooperation between the pouring mechanism and the anti-oxidation mechanism, the casting liquid is prevented from directly contacting the air, thus avoiding oxidation and cooling. The anti-splash plate improves the safety of feeding. Furthermore, it facilitates the transportation of casting liquid and makes it easy to control the amount used.

[0004] Currently, during material feeding, the material flows naturally into the casting mold through an external feeding cylinder. However, the portion of the feeding cylinder extending into the mold cavity is horizontal, where molten metal tends to accumulate and solidify, making cleaning difficult and prone to blockage over prolonged use. Therefore, this invention proposes a copper sleeve centrifugal casting device and method to solve the above problems. Summary of the Invention

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

[0006] To achieve the above objectives, the present invention provides the following technical solution: a centrifugal casting device for copper sleeves, comprising:

[0007] A casting mold, wherein an annular flange is fixedly connected to one end of the casting mold opening, and a magnet block is fixedly embedded on the surface edge of the annular flange;

[0008] The feeding cylinder is an "L"-shaped hollow structure with rounded corners. A feeding sleeve is rotatably mounted on the outer side of the horizontal section of the feeding cylinder via 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 disc is fixedly mounted on the outer side of the feeding sleeve, and a magnetic piece corresponding to the magnetic block is fixed on the surface of the transmission disc. A spiral blade is fixedly mounted on the inner wall of the feeding sleeve.

[0009] The base is located directly below the casting mold, and two driving rollers are rotatably installed on the base and are located on both sides of the casting mold to support the casting mold.

[0010] Preferably, the upper end of the feeding cylinder is provided with a feeding hopper, the inner cavity of the horizontal section of the feeding cylinder is fixedly provided with a hollow shaft, one end of the hollow shaft is fixedly sleeved with a support disc, the inner wall of one end 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 and is attached to the support disc, the side surface of the support ring is fixedly provided with a track ring, and the surface of the track ring is provided with a wave-shaped recess groove, the surface of the support disc is movably embedded with a rolling body corresponding to the recess groove, the rolling body is pressed by a return spring and protrudes from the surface of the support disc, and the inner wall of one end of the feeding sleeve is provided with a feeding port, and the feeding port and the support disc are located on both sides of the support ring.

[0011] Preferably, the side surface of the transmission disc is attached with a friction ring, one side surface of the friction ring is provided with a wear-resistant layer, the other side surface of the friction ring is provided with an annular frame, the annular frame is fixedly connected with the feeding cylinder through a connecting frame, one end of the connecting frame is fixedly provided with a side pressing plate, the side surface of the annular frame is provided with a pressing plate, the pressing plate and the side pressing plate are fixedly connected through bolts, the bolts movably penetrate the annular frame, the surface of the annular frame is provided with an adjusting bolt through a threaded penetration, one end of the adjusting bolt is fixedly provided with a circular boss, and the circular boss is rotatably installed in the interior of the friction ring, the end surface of the circular boss is provided with a receiving groove, and the inner cavity of the receiving groove is fixedly installed with a pressing spring, and the other end of the adjusting bolt is fixedly provided with a knob.

[0012] Preferably, one end of the feeding sleeve is fixedly provided with a gas backflow cylinder, and the gas backflow cylinder is in the shape of a hollow circular table, the inner wall of the gas backflow cylinder is fixedly provided with spiral vanes two, and the rotation direction of the spiral vanes two is opposite to that of the spiral vanes one, the inner wall of one end of the gas backflow cylinder is fixedly provided with a perforated plate, and the open end forms a flared horn, the two ends of the hollow shaft are provided with openings, and the inner cavities of the gas backflow cylinder and the outside are communicated, the other end of the feeding sleeve is fixedly provided with a limiting ring on the inner wall, and the limiting ring is attached to the end surface of the horizontal section of the feeding cylinder, and the cross section of the limiting ring is in the shape of a right-angled trapezoidal structure.

[0013] Preferably, the surface of the base is fixedly provided with a sliding rail plate, the surface of the sliding rail plate is provided with a limiting sliding groove and a scale table, the outer side of the feeding cylinder is fixedly provided with a feeding frame, the lower end of the feeding frame is fixedly provided with a limiting sliding seat, the limiting sliding seat is slidably installed in the inner cavity of the limiting sliding groove and is adapted thereto, the middle part of the feeding frame is fixedly provided with a reinforcing plate, the telescopic part is a gas cylinder, and the movable end of the telescopic part is fixedly connected with the reinforcing plate.

[0014] A copper bush centrifugal casting method using the copper bush centrifugal casting device, specifically comprising the following steps:

[0015] Step one, adjust the friction between the friction ring and the transmission disc;

[0016] Step two, start the drive 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 three, fill 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 step one, the adjusting screw is moved along its length direction by twisting the adjusting screw, and the adjusting screw pushes the friction ring to the transmission disc through the circular boss and tightly presses it.

[0019] Preferably, in step two, the controller controls the telescopic part to retract 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 transmission disc is close to the annular flange, the annular flange rotates synchronously with the casting mold, the magnet block and the magnet piece are attracted to each other by magnetic force and generate a torque on the transmission disc to offset the friction generated by the friction ring on the transmission disc, when the torque generated by the magnetic force on the transmission disc is greater than the friction generated by the friction ring, the transmission disc drives the feeding sleeve to gradually rotate.

[0020] Preferably, in step three, 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 helical blade generates a thrust force on the metal casting liquid to make it flow to the feeding port and be thrown out from the inner cavity of the feeding port to the inner cavity of the casting mold under the action of centrifugal force, and the high-speed rotation of the casting mold can realize centrifugal casting of the metal casting liquid.

[0021] Preferably, in step three, 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 outward, and since the helical blade two in the inner wall of the gas return cylinder is driven to flow when rotating, the hot air in the inner cavity of the casting mold is sequentially discharged to the outside along the inner cavity of the gas return cylinder and the inner cavity of the hollow shaft, and the hot air flowing in the inner cavity of the hollow shaft avoids the temperature of the inner cavity of the feeding cylinder being too low to cause the metal casting liquid to cool and solidify.

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

[0023] The application is characterized in that a feeding sleeve is rotatably sleeved outside the horizontal section of the feeding cylinder, a driving disc is fixedly sleeved outside the feeding sleeve, a magnet piece is fixed on the surface edge of the driving disc, a spiral blade one is fixed on the inner wall of the driving disc, an annular flange is fixedly arranged at the opening end of the casting mold, a magnet block corresponding to the magnet piece is 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 driving disc is close to the annular flange and is driven to rotate gradually under the attraction between the magnet block and the magnet piece, when the feeding sleeve rotates, the spiral blade one pushes the metal casting liquid of 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. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole structure perspective view of the application;

[0025] Figure 2 It is a whole structure cross-section view of the application;

[0026] Figure 3 It is a casting mold structure perspective view of the application;

[0027] Figure 4 It is a feeding sleeve structure internal view of the application;

[0028] Figure 5 It is a feeding cylinder and feeding sleeve structure connection view of the application;

[0029] Figure 6 It is a feeding cylinder structure explosion view of the application;

[0030] Figure 7 It is a feeding cylinder structure internal view of the application; Figure 4 It is a structure enlarged view of A in the application;

[0031] Figure 8 It is a track ring structure perspective view of the application;

[0032] Figure 9 It is a hollow shaft and support disc structure internal view of the application;

[0033] Figure 10 It is an adjusting bolt structure perspective view of the application;

[0034] Figure 11 It is a structure enlarged view of B in the application. Figure 4

[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, supporting disc; 251, rolling body; 252, return spring; 26, feeding frame; 261, reinforcing plate; 262, limiting sliding seat; 3, feeding sleeve; 31, transmission disc; 311, magnet piece; 32, helical blade one; 33, feeding port; 34, supporting ring; 341, track ring; 342, recessed groove; 35, gas backflow cylinder; 351, helical blade two; 352, perforated plate; 353, horn mouth; 36, limiting ring; 4, friction ring; 41, wear-resistant layer; 42, adjusting bolt; 421, circular boss; 422, storage groove; 423, pressing spring; 424, knob; 5, bearing; 6, telescopic piece; 7, sliding rail plate; 71, limiting sliding groove; 72, scale; 8, base; 9, driving roller. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme of the present application clear, complete and the advantages more clear and obvious, the embodiments of the present application are further described in detail below with reference to the drawings. It should be understood that the specific embodiments described here are part of the embodiments of the present application, not all the embodiments, and are only used to explain the embodiments of the present application, and do not limit the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0037] Please refer to Figures 1 to 11 The present application provides a technical scheme:

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

[0039] Specifically, the annular flange 11 is fixedly connected at the opening of one end of the casting mold 1, and the surface edge of the annular flange 11 is fixedly embedded with a magnet block 12, such as Figure 3As shown, the annular flange 11 is fixedly connected with the casting mold 1 by bolts and nuts, and the inner diameter of the annular flange 11 is smaller than that of the casting mold 1. When the metal casting liquid is centrifugally cast in the inner cavity of the casting mold 1 along with the rotation of the casting mold 1, the annular flange 11 can prevent the metal casting liquid from leaking from the open end of the casting mold 1 because the metal casting liquid closely adheres to the inner wall of the casting mold 1. In addition, it should be noted that an end plate with the same function as the annular flange 11 is also needed at the other end opening of the casting mold 1 to prevent the metal casting liquid from leaking. The end plate can be annular or circular, and is connected with the casting mold 1 by using a known locking structure such as a buckle or a bolt. After the centrifugal casting of the metal casting liquid in the copper sleeve is completed, the end 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 by using a corresponding tool.

[0040] Secondly, the feeding cylinder 2 is a hollow structure in the shape of "L" and the corners are rounded, as shown in Figure 2As shown, the metal casting liquid is filled from the upper end of the feeding cylinder 2, flows out of the horizontal section of the feeding cylinder 2, and is rotatably sleeved with the feeding sleeve 3 outside the horizontal section of the feeding cylinder 2 through the bearing 5. One end of the feeding sleeve 3 penetrates 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 cannot be separated from the feeding cylinder 2. The feeding sleeve 3 is fixedly sleeved with the transmission disc 31 outside, and the surface of the transmission disc 31 is fixedly provided with the magnet piece 311 corresponding to the magnet block 12. When the transmission disc 31 approaches the annular flange 11, the magnet piece 311 and the magnet block 12 are attracted to each other. Since the annular flange 11 rotates synchronously with the casting mold 1, the transmission disc 31 can gradually rotate after approaching the annular flange 11. The maximum rotation speed of the transmission disc 31 can be consistent with that of the casting mold 1. The inner wall of the feeding sleeve 3 is fixedly provided with the helical blade 32. When the feeding sleeve 3 rotates, the helical 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 to the inner cavity of the casting mold 1. Since the metal casting liquid has viscosity and there is a viscous force between the metal casting liquids, the metal casting liquid in the inner cavity of the feeding sleeve 3 can also flow to the inner cavity of the feeding sleeve 3 when flowing, compared with the traditional structure which relies on the gravity of the metal casting liquid to flow to the inner cavity of the casting mold 1. The feeding cylinder 2 of the device cooperates with the rotating feeding sleeve 3 to quickly send the metal casting liquid into the inner cavity of the casting mold 1 and reduce the possibility of accumulation of the metal casting liquid in the horizontal section of the feeding cylinder 2. In addition, since the device only needs to extend one end of the feeding sleeve 3 into the inner cavity of the feeding cylinder 2 to ensure normal filling of the metal casting liquid, the horizontal section of the feeding cylinder 2 can be set shorter, and only needs to be rotationally connected with the other end of the feeding sleeve 3, thereby further avoiding the accumulation, cooling and solidification of the metal casting liquid in the horizontal section of the feeding cylinder 2 and the difficulty in cleaning.

[0041] Furthermore, the base 8 is located directly below the casting mold 1, and two drive rollers 9 are rotatably installed on the base 8. The two drive rollers 9 are located on the two sides of the casting mold 1 and support the casting mold 1. The drive rollers 9 are driven to rotate by an external motor. The casting mold 1 is located between the two drive rollers 9 under the action of its own gravity and is supported by the drive rollers 9. Therefore, the drive rollers 9 can drive the casting mold 1 to rotate when the drive rollers 9 rotate. In order to prevent the casting mold 1 and the drive rollers 9 from being dislocated and shifted in the axial direction, the device can also be provided with an annular protrusion on the casting mold 1 and an annular groove corresponding to the annular protrusion on the drive rollers 9. The above are all known technologies and will not be described here. The surface of the base 8 is fixedly installed with the telescopic member 6, and the telescopic member 6 drives the feeding cylinder 2 to slide horizontally along the axial direction of the casting mold 1.

[0042] In order to support one end of the feeding sleeve 3, the application also has a feeding hopper 21 arranged at the upper end of the feeding cylinder 2, which can facilitate the staff to add metal casting liquid into the inner cavity of the feeding cylinder 2. A hollow shaft 24 is fixedly arranged in the horizontal section of the inner cavity of the feeding cylinder 2. One end of the hollow shaft 24 extends out of the horizontal section of the inner cavity of the feeding cylinder 2 and extends into the inner cavity of the feeding sleeve 3. A support disc 25 is fixedly arranged outside one end of the hollow shaft 24. One end of the hollow shaft 24 is fixedly connected with a support ring 34. The support ring 34 is movably arranged outside the hollow shaft 24 and abuts against the support disc 25. As shown in Figure 2 、 Figure 4 and Figure 6 , one end of the hollow shaft 24 can support the support ring 34, and the support disc 25 can support the inner wall of one end of the feeding sleeve 3. Therefore, the feeding sleeve 3 can be more stably connected with the feeding cylinder 2 in rotation and will not cause one end to drop due to too much metal casting liquid in the inner cavity. The track ring 341 is fixedly arranged on the side of the support ring 34, and the wave-shaped recess groove 342 is arranged on the surface of the track ring 341. The rolling body 251 corresponding to the recess groove 342 is movably embedded on the surface of the support disc 25. When the feeding sleeve 3 rotates, the relative rotation between the support ring 34 and the rolling body 251 occurs, and the rolling body 251 rolls on the surface of the track ring 341. Since the recess groove 342 is wave-shaped, the rolling body 251 will vibrate in the length direction of the hollow shaft 24. The vibration is transmitted to the hollow shaft 24, which can shake off the metal casting liquid adhering to the surface of the hollow shaft 24. In addition, the rolling body 251 is compressed by the return spring 252 and protrudes from the surface of the support disc 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 recess groove 342, thereby continuously generating vibration. The feeding port 33 is arranged on the inner wall of one end of the feeding sleeve 3 and is located on the two sides of the support ring 34, respectively. The arrangement 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.

[0043] In order to adjust the pressure of the friction ring 4 on the transmission disc 31, the application also has the friction ring 4 arranged on the side of the transmission disc 31, and the wear-resistant layer 41 is arranged on one side of the friction ring 4. In combination with Figure 4 and Figure 6As shown, when the friction ring 4 is close to the transmission disc 31 and is pressed tightly, the friction between the wear-resistant layer 41 and the transmission disc 31 can generate a friction force, so as to avoid the transmission disc 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 transmission disc 31 is close to the annular flange 11, the transmission disc 31 will gradually rotate under the mutual attraction of the magnet block 12 and the magnet piece 311. The annular frame 22 is arranged on the other side of the friction ring 4, and the annular frame 22 is fixedly connected with the feeding cylinder 2 through the connecting frame 23. One end of the connecting frame 23 is fixedly connected with the side pressing plate 231. The side surface of the annular frame 22 is provided with the pressing plate 221. The pressing plate 221 and the side pressing plate 231 are fixedly connected through bolts, and the bolts movably penetrate the annular frame 22, as shown in Figure 6 As shown, the annular frame 22 can be fixed between the side pressing plate 231 and the pressing plate 221, that is, fixedly connected with the connecting frame 23. An adjusting bolt 42 is arranged on the surface of the annular frame 22 through a thread. One end of the adjusting bolt 42 is fixedly connected with a circular boss 421, and the circular boss 421 is rotatably installed in the interior of the friction ring 4. The circular boss 421 can only rotate relative to the friction ring 4, and cannot have a relative position. In order 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 movably surrounds the outside of the circular boss 421. This is a prior art, and will not be described here. A receiving groove 422 is formed in the end surface 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 fixedly connected with a knob 424, as shown in Figure 6 and Figure 10 As shown, 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 the length direction of the adjusting bolt 42, so as to drive the friction ring 4 to move. In combination with Figure 4 As shown, when the friction ring 4 moves close to the transmission disc 31 until the friction ring 4 is attached to the transmission disc 31, the friction ring 4 cannot continue to move. At this time, the compression spring 423 will be compressed by continuously twisting the adjusting bolt 42. The elastic force generated by the compression spring 423 returning to the deformation acts on the friction ring 4, so as to increase the pressure generated by the friction ring 4 on the feeding sleeve 3.

[0044] In order to maintain the temperature of the hollow shaft 24 itself and avoid the metal casting liquid from cooling too fast, the application also has a gas backflow cylinder 35 fixedly arranged at one end of the feeding sleeve 3, and the gas backflow cylinder 35 is a hollow circular table. A spiral blade two 351 is fixedly arranged on the inner wall of the gas backflow cylinder 35, and the rotation direction of the spiral blade two 351 is opposite to that of the spiral blade one 32, as shown in Figure 4 and Figure 7As shown, when the feeding sleeve 3 rotates, the spiral blade two 351 can drive the air flow, and the direction of the air flow is opposite to the flow direction of the metal casting liquid in the inner cavity of the feeding sleeve 3, that is, the spiral blade two 351 can suck the hot air in the inner cavity of the casting mold 1 into the inner cavity of the hollow shaft 24, and then discharge to the outside. The inner wall of the opening end of the gas backflow cylinder 35 is fixed with a perforated plate 352, and the opening end forms a flared bell mouth 353. The perforated plate 352 and the bell mouth 353 are arranged to reduce the possibility of the metal casting liquid entering the inner cavity of the gas backflow cylinder 35, but do not affect the normal flow and external discharge of the hot air. The hollow shaft 24 is provided with openings at both ends, which are respectively connected with the inner cavity of the gas backflow cylinder 35 and the outside, so that the hot air in the inner cavity of the casting mold 1 is discharged to the outside along the inner cavity of the hollow shaft 24. When the hot air flows in the inner cavity of the hollow shaft 24, the hot air can also maintain the temperature of the surface of the hollow shaft 24, so that the temperature of the metal casting liquid in the inner cavity of the feeding cylinder 2 does not drop too fast, and cooling and solidification does not occur in the inner cavity of the feeding cylinder 2. Figure 11 and Figure 2 As shown, the horizontal end surface of the feeding cylinder 2 abuts against the side surface of the limiting ring 36. By arranging the cross section of the limiting ring 36 in a straight trapezoidal 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 application also has a slide rail plate 7 fixed on the surface of the base 8. The surface of the slide rail plate 7 is provided with a limiting sliding groove 71 and a scale table 72. The outer side of the feeding cylinder 2 is fixed with a feeding frame 26. The lower end of the feeding frame 26 is fixed with a limiting sliding seat 262. The limiting sliding seat 262 is slidingly installed in the inner cavity of the limiting sliding groove 71 and is adapted thereto. The middle part of the feeding frame 26 is fixed with a reinforcing plate 261. The telescopic member 6 is a gas cylinder, and the movable end of the telescopic member 6 is fixedly connected with the reinforcing plate 261. Figure 5 and Figure 3 As shown, the cooperation of the limiting sliding groove 71 and the limiting sliding seat 262 can be used to guide the movement of the feeding cylinder 2, so 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 extending into the inner cavity of the casting mold 1. The arrangement of the scale table 72 can facilitate the observation of the distance between the transmission disc 31 and the annular flange 11 by the worker. The arrangement 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 application also discloses a copper sleeve centrifugal casting method using the copper sleeve centrifugal casting device.

[0047] Step one, adjust the friction between the friction ring 4 and the transmission disc 31;

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

[0049] Step three, fill 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 one, by turning the adjusting bolt 42, the adjusting bolt 42 is moved along its length direction, and the adjusting bolt 42 pushes the friction ring 4 through the circular boss 421 to press and fit the friction ring 4 close to the transmission disc 31.

[0051] In step two, the controller controls the telescopic part 6 to retract and drive 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 transmission disc 31 is close to the annular flange 11, the annular flange 11 rotates synchronously with the casting mold 1, the magnet block 12 and the magnet piece 311 are attracted to each other by magnetic force and generate a torque on the transmission disc 31 to offset the friction generated by the friction ring 4 on the transmission disc 31, when the torque generated by the magnetic force on the transmission disc 31 is greater than the friction generated by the friction ring 4, the transmission disc 31 drives the feeding sleeve 3 to rotate gradually.

[0052] In step three, 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 helical blade one 32 generates a thrust on the metal casting liquid to make it flow to the feeding port 33 and be 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 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 outward, since the helical blade two 351 in the inner wall of the gas return cylinder 35 drives the air flow when rotating, therefore, 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, the inner cavity of the hollow shaft 24, when the hot air flows in the inner cavity of the hollow shaft 24, it avoids the temperature in the inner cavity of the feeding cylinder 2 being too low to cause the metal casting liquid to cool and solidify.

[0053] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A copper bush centrifugal casting apparatus, characterised in that: Include: The casting mold (1) is fixedly connected with the annular flange (11) at one end opening, and the surface edge of the annular flange (11) is fixedly embedded with the magnet block (12); The feeding cylinder (2) is a hollow structure of "L" shape, and the corner is rounded. The horizontal section of the feeding cylinder (2) is rotatably sleeved with a feeding sleeve (3) outside through a bearing (5). One end of the feeding sleeve (3) penetrates the middle of the annular flange (11) and extends into the inner cavity of the casting mold (1). The outer side of the feeding sleeve (3) is fixedly sleeved with a transmission disc (31), and the surface of the transmission disc (31) is fixedly provided with a magnet piece (311) corresponding to the magnet block (12). The inner wall of the feeding sleeve (3) is fixedly provided with a spiral blade (32). The base (8) is located directly below the casting mold (1), and two drive rollers (9) are rotatably installed on the base (8). The two drive rollers (9) are respectively located on the two sides of the casting mold (1) and support the casting mold (1). The surface of the base (8) is fixedly provided with an extension piece (6), and the extension piece (6) drives the feeding cylinder (2) to slide horizontally along the axial direction of the casting mold (1).

2. A copper bush centrifugal casting apparatus as claimed in claim 1, wherein: The upper end of the feeding cylinder (2) is provided with a feeding hopper (21). The horizontal section of the feeding cylinder (2) is fixedly provided with a hollow shaft (24) in the inner cavity. One end of the hollow shaft (24) is fixedly sleeved with a support disc (25) outside. One end of the feeding sleeve (3) is fixedly connected with a support ring (34) on the inner wall. The support ring (34) is movably sleeved on the outside of the hollow shaft (24) and is in close contact with the support disc (25). The side surface of the support ring (34) is fixedly provided with a track ring (341), and the surface of the track ring (341) is provided with a wave-shaped recess groove (342). The surface of the support disc (25) is movably embedded with a rolling body (251) corresponding to the recess groove (342). The rolling body (251) is compressed by the return spring (252) and protrudes from the surface of the support disc (25). One end of the feeding sleeve (3) is provided with a feeding port (33) on the inner wall, and the feeding port (33) and the support disc (25) are respectively located on the two sides of the support ring (34).

3. A copper bush centrifugal casting apparatus as claimed in claim 2, wherein: The side surface of the transmission disc (31) is attached with a friction ring (4), one side surface of the friction ring (4) is provided with a wear-resistant layer (41), the other side of the friction ring (4) is provided with an annular frame (22), the annular frame (22) is fixedly connected with the feeding cylinder (2) through a connecting frame (23), one end of the connecting frame (23) is fixedly connected with a side pressing plate (231), the side surface of the annular frame (22) is provided with a pressing plate (221), the pressing plate (221) and the side pressing plate (231) are fixedly connected through bolts, and the bolts movably penetrate the annular frame (22), the surface of the annular frame (22) is provided with an adjusting bolt (42) penetrating through in a threaded manner, one end of the adjusting bolt (42) is fixedly connected with a circular boss (421), and the circular boss (421) is rotatably installed in the friction ring (4), the end surface of the circular boss (421) is provided with a receiving groove (422), and the receiving groove (422) is fixedly connected with a pressing spring (423), and the other end of the adjusting bolt (42) is fixedly connected with a knob (424).

4. A copper bush centrifugal casting apparatus as claimed in claim 3, wherein: One end of the feeding sleeve (3) is fixedly provided with a gas backflow cylinder (35), and the gas backflow cylinder (35) is in a hollow circular table shape, the inner wall of the gas backflow cylinder (35) is fixedly provided with spiral blades two (351), and the rotation direction of the spiral blades two (351) is opposite to that of the spiral blades one (32), the inner wall of the opening end of the gas backflow cylinder (35) is fixedly provided with a perforated plate (352), and the opening end forms a flared horn (353), the hollow shaft (24) is provided with openings at both ends, and is respectively connected with the inner cavity of the gas backflow cylinder (35) and the outside, the other end of the feeding sleeve (3) is fixedly provided with a limiting ring (36) on the inner wall, and the limiting ring (36) is attached to the end surface of the horizontal section of the feeding cylinder (2), and the cross section of the limiting ring (36) is in a right trapezoidal structure.

5. A copper bush centrifugal casting apparatus as claimed in claim 4, wherein: The surface of the base (8) is fixedly provided with a sliding rail plate (7), the surface of the sliding rail plate (7) is provided with a limiting sliding groove (71) and a scale table (72), the outer side of the feeding cylinder (2) is fixedly provided with a feeding frame (26), the lower end of the feeding frame (26) is fixedly provided with a limiting sliding seat (262), the limiting sliding seat (262) is slidingly installed in the inner cavity of the limiting sliding groove (71) and is adapted thereto, the middle part of the feeding frame (26) is fixedly provided with a reinforcing plate (261), and the stretching and contracting piece (6) is a gas cylinder, and the movable end of the stretching and contracting piece (6) is fixedly connected with the reinforcing plate (261).

6. A copper bush centrifugal casting method characterized by: The copper sleeve centrifugal casting device of claim 5 is used, and specifically includes the following steps: Step one, adjusting the friction force between the friction ring (4) and the transmission disc (31); Step two, starting the driving roller (9) to drive the casting mold (1) to rotate, moving the feeding cylinder (2) and inserting one end of the feeding sleeve (3) into the inner cavity of the casting mold (1); Step three, adding 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) to perform centrifugal casting.

7. A method of centrifugal casting of a copper bushing according to claim 6, characterised in that: In the step one, the adjusting bolt (42) is moved along its length direction by screwing, and the circular boss (421) of the adjusting bolt (42) pushes the friction ring (4) to be close to the transmission disc (31) and to be tightly pressed.

8. A method of centrifugal casting a copper bushing according to claim 7, characterised in that: In the step two, the controller controls the telescopic part (6) to be contracted and drives the feeding cylinder (2) and the feeding sleeve (3) to be close to the casting mold (1) until the end of the feeding sleeve (3) is inserted into the inner cavity of the casting mold (1), at this time, the transmission disc (31) is close to the annular flange (11), the annular flange (11) rotates synchronously with the casting mold (1), the magnet block (12) and the magnet piece (311) are attracted to each other by magnetic force and generate a torque on the transmission disc (31) to offset the friction force generated by the friction ring (4) on the transmission disc (31), when the torque generated by the magnetic force on the transmission disc (31) is greater than the friction force generated by the friction ring (4) on the transmission disc (31), the transmission disc (31) drives the feeding sleeve (3) to gradually rotate.

9. A method of centrifugal casting a copper bushing according to claim 8, characterised in that: In the step three, 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 helical blade (32) generates a thrust on the metal casting liquid to make it flow to the feeding port (33) and be 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 high-speed rotation of the casting mold (1) can realize centrifugal casting of the metal casting liquid.

10. A method of centrifugal casting a copper bushing according to claim 9, characterised in that: In the step three, 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 outward, because the helical blade (351) on the inner wall of the gas return cylinder (35) drives the air flow when rotating, therefore, 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 (24) in turn, when the hot air flows in the inner cavity of the hollow shaft (24), the temperature in the inner cavity of the feeding cylinder (2) is prevented from being too low to cause the metal casting liquid to cool and solidify.

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