A wax mold sand covering machine

Abstract

The present invention belongs to the technical field of casting equipment, specifically a wax model sand covering machine, comprising a shell, a transparent door being slidably connected to the outside of the shell, a sand shooting nozzle being installed on the top of the shell, and a support platform being arranged below the sand shooting nozzle; the support platform comprises a limit platform fixedly connected to the inner bottom surface of the shell, and also comprises a plurality of sliding supports which are plugged into each other; a jacking assembly is arranged below the support platform, and the jacking assembly comprises a jacking block, and the jacking assembly drives the sliding support to slide up and down through the jacking block; by starting the jacking assembly, the jacking assembly drives the sliding support to move upward, thereby driving the wax model to move upward, and then the distance between the wax model and the sand shooting nozzle can be adjusted to ensure the sand covering effect and improve the uniformity of the wax model sand covering.

Description

Technical Field

[0001] The invention belongs to the technical field of casting equipment, in particular to a wax mold sand covering machine. Background Art

[0002] Casting is a type of metal heat treatment process. Currently, many parts in industry need to be processed by casting. Investment casting is one of the casting methods. Investment casting is also called lost wax casting. It mainly uses wax to make a wax mold of the part to be cast. The wax mold is then covered with casting sand. After drying, it is heated to melt the wax, thus making a sand mold. After that, molten metal is poured into the sand mold. After cooling, the part can be taken out of the sand mold.

[0003] In the current existing technology, when covering the wax mold with foundry sand, most of the operations are performed using a sand covering machine. This sand covering machine only requires employees to place the wax mold in a designated position, and then spray the covering sand onto the surface of the wax mold through a nozzle, thereby completing the automated operation.

[0004] The nozzles of existing sand covering machines are mostly fixed. However, in actual operation, it is inevitable to encounter parts with different sizes and specifications, some parts are high and some parts are short. When encountering such parts, the existing sand covering machines are difficult to fully and effectively sand the parts, and their applicability is insufficient.

[0005] To this end, the present invention provides a wax mold sand coating machine to solve the problems in the above background technology. Summary of the Invention

[0006] The technical solution adopted by the present invention to solve its technical problems is: the wax model sand covering machine described in the present invention includes a shell, a transparent door is slidably connected to the outside of the shell, a sand shooting nozzle is installed on the top of the shell, and a support platform is provided under the sand shooting nozzle; the support platform includes a limit platform fixedly connected to the bottom surface of the shell, and also includes a plurality of sliding support platforms plugged into each other; a jacking assembly is provided under the support platform, the jacking assembly includes a jacking block, and the jacking assembly drives the sliding support platform to slide up and down through the jacking block.

[0007] Preferably, the jacking assembly also includes a driving assembly, and a plurality of rotating screws are installed at the output end of the driving assembly. The outside of the rotating screw is connected to a sliding block through a thread. The bottom end of the sliding block is slidably connected to a limiting guide rail, and the limiting guide rail is fixedly connected to the shell. A telescopic rod is fixedly connected to the top of the sliding block, and the output end of the telescopic rod is fixedly connected to the jacking block.

[0008] Preferably, a plurality of retractable telescopic brackets are provided inside the shell and outside the support platform, the telescopic brackets are rotatably connected to a rotating shaft inside, a plurality of spreading blades are fixed to the outside of the rotating shaft, a rotating assembly is installed outside the telescopic brackets, and the output end of the rotating assembly is connected to the spreading blades.

[0009] Preferably, a material receiving platform is fixedly connected between the support platform and the shell, and a filter screen is fixedly connected to the top of the material receiving platform.

[0010] Preferably, the telescopic bracket is fixed with a sliding rod at one end away from the support platform, the sliding rod passes through the shell and is slidably connected thereto, the sliding rod is fixed with a magnetic bevel block at one end away from the telescopic bracket, and the magnetic bevel block is slidably connected with a liftable pressing bevel block on the side away from the telescopic bracket.

[0011] Preferably, a pull rope is fixedly connected between the pressing bevel block and the sliding block, a return spring is fixedly connected to the top of the pressing bevel block, a protective shell is fixedly connected to the outside of the return spring, and the protective shell is fixedly connected to the housing.

[0012] Preferably, a pair of support frames are fixed to the bottom of the inner wall of the protective shell, and a plurality of mounting frames are fixed to the inner bottom surface of the material receiving platform and at corresponding positions of the pull cable, and the interiors of the support frames and the mounting frames are rotatably connected to guide wheels.

[0013] Preferably, an elastic shielding cover is provided on the outside of the mounting frame, and two ends of the elastic shielding cover are fixedly connected to the shell and the material receiving platform respectively.

[0014] Preferably, a plurality of elastic ropes are fixed to the top surface of the inner wall of the elastic shielding cover at positions corresponding to the mounting frame, and a hollow counterweight is fixed to the bottom end of the elastic rope, and cotton wool filled with lubricating oil is placed inside the hollow counterweight.

[0015] Preferably, the spreading blade includes a fixed portion, the top end of the fixed portion is slidably connected to a fanning portion, and an annular air bag is fixedly connected inside the receiving platform and below the filter screen.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The wax model sand coating machine described in the present invention starts the jacking component, and the operation of the jacking component drives the sliding support platform to move upward, thereby driving the wax model to move upward, and then the distance between the wax model and the sand shooting nozzle can be adjusted to ensure the sand coating effect and improve the uniformity of the wax model sand coating.

[0018] 2. The wax model sand covering machine described in the present invention minimizes the contact area between the sliding support platform and the bottom end of the wax model, thereby effectively eliminating the dead corner of sand covering caused by the bottom end of the wax model being blocked by the support platform in the prior art. This not only achieves the effect of self-adjusting the height of the wax model sand covering, but also achieves the effect of eliminating the dead corner of the wax model sand covering. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 is a perspective view of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the shell in the present invention;

[0022] Figure 3 It is a cross-sectional view of the material receiving platform structure in the present invention;

[0023] Figure 4 It is a structural schematic diagram of the support platform in the present invention;

[0024] Figure 5 It is a structural diagram of the driving component in the present invention;

[0025] Figure 6 It is a schematic structural diagram of the elastic shielding cover of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the cable in the present invention;

[0027] Figure 8 It is a structural schematic diagram of the spreading blade in the present invention.

[0028] In the figure: 1. Shell; 2. Transparent door; 3. Sand-shooting nozzle; 4. Support platform; 401. Limiting platform; 402. Sliding support platform; 5. Sliding block; 6. Telescopic rod; 7. Lifting block; 8. Rotating screw; 9. Driving assembly; 10. Limiting guide rail; 11. Telescopic bracket; 12. Sprinkling blade; 1201. Fanning part; 1202. Fixed part; 13. Rotating assembly; 14. Sliding rod; 15. Magnetic bevel block; 16. Pressing bevel block; 17. Protective shell; 18. Pull rope; 19. Return spring; 20. Support frame; 21. Mounting frame; 22. Elastic shielding cover; 23. Elastic rope; 24. Hollow counterweight; 25. Receiving platform; 26. Filter screen; 27. Annular inflatable bag. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0030] like Figures 1 to 8 As shown, a wax model sand coating machine according to an embodiment of the present invention comprises a housing 1, a transparent door 2 is slidably connected to the outside of the housing 1, a sand shooting nozzle 3 is installed on the top of the housing 1, and a support platform 4 is provided below the sand shooting nozzle 3;

[0031] The support platform 4 includes a limit platform 401 fixed to the inner bottom surface of the housing 1, and also includes a plurality of sliding support platforms 402 plugged into each other;

[0032] A lifting assembly is provided below the support platform 4, and the lifting assembly includes a lifting block 7. The lifting assembly drives the sliding support platform 402 to slide up and down through the lifting block 7;

[0033] During operation, when the embodiment of the present invention is in use, the sand-shooting nozzle 3 needs to be connected to the external sand supply device first, and then the staff opens the transparent door 2 to place the wax model that needs to be sand-coated on the support platform 4. It should be noted that when placing, the center of the packaged wax model and the center of the support platform 4 need to be in the same position as much as possible, and different wax models have different individual differences. Some wax models are too low in height. At this time, the jacking component can be started, and the operation of the jacking component drives the sliding support platform 402 to move upward, thereby driving the wax model to move upward, and then the distance between the wax model and the sand-shooting nozzle 3 can be adjusted to ensure the effect of sand coating and improve the uniformity of sand coating on the wax model; after the position adjustment is completed, the sand-shooting nozzle 3 can be started to sandblast the wax model; it should be noted that, refer to the attached Figure 3 -Attached Figure 4 It can be seen that the sliding supports 402 can be designed to be multiple, and the multiple sliding supports 402 are slidably connected to each other, and the top surfaces of the sliding supports 402 are provided with card slots and card blocks, and the card slots and card blocks between the two sliding supports 402 that are plugged into each other correspond to each other. At the same time, the bottom ends of the sliding supports 402 are fixedly connected with lifting rings, and the diameter of the lifting rings is larger than the diameter of the top surface of the sliding support 402. In this way, the sliding support 402 is limited when it slides upward, thereby avoiding the separation of the two sliding supports 402 that are plugged into each other, thereby improving the stability of equipment operation.

[0034] The jacking assembly also includes a driving assembly 9, the output end of the driving assembly 9 is equipped with a plurality of rotating screws 8, the external portion of the rotating screw 8 is connected to a sliding block 5 by a thread, the bottom end of the sliding block 5 is slidably connected to a limiting guide rail 10, the limiting guide rail 10 is fixedly connected to the housing 1, the top end of the sliding block 5 is fixedly connected to a telescopic rod 6, the output end of the telescopic rod 6 is fixedly connected to the jacking block 7;

[0035] When working, it should be noted that the driving component 9 is a prior art, and its specific implementation method can be a servo motor combined with four bevel gear sets, and then the bevel gear is connected to the rotating screw 8. This part is a prior art and will not be described in detail. When in use, first start the driving component 9 to drive the rotating screw 8 to rotate. It should be noted that a limiting guide rail 10 is provided on the bottom surface of the inner wall of the shell 1, and the sliding block 5 is slidably connected to the limiting guide rail 10. Therefore, the rotation of the rotating screw 8 will drive the sliding block 5 to slide on the limiting guide rail 10, and the sliding block 5 slides to adjust its position until it moves to the bottom of one of the sliding supports 402, and then the driving component 9 stops running. At this time, the telescopic rod 6 starts to drive the lifting block 7 to move, and the lifting block 7 moves so as to move with the sliding The support platform 402 contacts and pushes the sliding support platform 402 to slide upward, thereby pushing the wax mold placed above the sliding support platform 402 to move upward; it should be noted that in the actual production process, the diameter of the wax mold is also inconsistent. When the sliding block 5 moves to the bottom of the sliding support platform 402, it is only necessary to ensure that the sliding support platform 402 is the smallest sliding support platform 402 that can stably support its wax mold. In this way, the contact area between the sliding support platform 402 and the bottom of the wax mold can be minimized, thereby effectively eliminating the dead corner of sand covering caused by the bottom end of the wax mold being blocked by the support platform 4 in the prior art, thereby achieving not only the effect of self-adjusting the sand covering height of the wax mold, but also the effect of eliminating the dead corner of sand covering of the wax mold, further improving the comprehensiveness of the sand covering of the wax mold, and making the obtained sand mold more uniform.

[0036] A plurality of retractable telescopic brackets 11 are provided inside the housing 1 and outside the support platform 4. A rotating shaft is rotatably connected inside the telescopic bracket 11, and a plurality of spreading blades 12 are fixedly connected to the outside of the rotating shaft. A rotating assembly 13 is installed outside the telescopic bracket 11, and an output end of the rotating assembly 13 is connected to the spreading blades 12.

[0037] During operation, considering that some wax models are wide at the top and narrow at the bottom or wide at both ends and narrow in the middle, sand covering by only using the sand shooting nozzle 3 cannot achieve the effect of comprehensive sand covering, which affects the final model quality. For this purpose, a throwing blade 12 is designed. It should be noted that the rotating component 13 includes a driving motor and a protective device for protecting the motor. This part is existing technology and will not be described in detail. In actual use, the rotating component 13 is started to drive the rotating shaft to rotate, and the rotation of the rotating shaft drives the throwing blade 12 to rotate. At this time, the sand material is ejected from the inside of the sand shooting nozzle 3, and part of the sand material will fall onto the surface of the throwing blade 12. The flipping of the throwing blade 12 will throw up this part of the sand material and throw it onto the surface of the wax model, thereby eliminating the dead corner of sand covering and improving the quality of molding.

[0038] A material receiving platform 25 is fixedly connected between the support platform 4 and the housing 1, and a filter screen 26 is fixedly connected to the top of the material receiving platform 25;

[0039] During operation, by designing the receiving platform 25 and the filter screen 26, after the sand is sprayed, it is filtered by the filter screen 26 and falls into the receiving platform 25 so as to be collected centrally, which is convenient for the reuse of the sand. At the same time, it also delays the falling of the sand, providing a basis for the throwing of the throwing blade 12.

[0040] The end of the telescopic bracket 11 away from the support platform 4 is fixedly connected to a sliding rod 14, which passes through the housing 1 and is slidably connected thereto. The end of the sliding rod 14 away from the telescopic bracket 11 is fixedly connected to a magnetic bevel block 15, and the side of the magnetic bevel block 15 away from the telescopic bracket 11 is slidably connected to a liftable pressing bevel block 16;

[0041] During operation, when the sliding support 402 moves upward, it means that the wax model is smaller at this time. At this time, the scattering position of the scattering blade 12 needs to be adaptively changed. During specific use, the pressing bevel block 16 will move downward as the sliding support 402 rises. The pressing bevel block 16 moves to push the magnetic bevel block 15 to move. Since the contact surface between the magnetic bevel block 15 and the pressing bevel block 16 is an oblique angle, the magnetic bevel block 15 will slide horizontally at this time, thereby pushing the sliding rod 14 to move. The movement of the sliding rod 14 will drive the telescopic bracket 11 and the scattering blade 12 to move toward the sliding support 402, so that the scattering blade 12 is closer to the sliding support 402 and closer to the wax model, so that the sand material scattered by the scattering blade 12 is closer to the wax model, thereby eliminating the dead corner of sand covering the wax model.

[0042] A cable 18 is fixedly connected between the pressing block 16 and the sliding block 5. A return spring 19 is fixedly connected to the top of the pressing block 16. A protective shell 17 is fixedly connected to the outside of the return spring 19. The protective shell 17 is fixedly connected to the housing 1.

[0043] During operation, as the sliding block 5 moves, it will simultaneously drive the cable 18 to move, and the movement of the cable 18 will drive the pressing bevel block 16 to stretch the return spring 19 downward and then move. This design makes it possible for the smaller the sliding support 402 is to move upward, the longer the movement stroke of the sliding block 5, and thus the longer the movement distance of the sliding rod 14, thereby achieving the effect of automatically adjusting the movement amount of the sliding rod 14 to adapt to sliding supports 402 of different sizes; it should also be noted that a magnet with opposite magnetic properties is installed inside the protective shell 17 at a position corresponding to the magnetic bevel block 15, so after the sliding block 5 is reset, the return spring 19 will pull the pressing bevel block 16 to reset it. At this time, the magnetic bevel block 15 will move toward the direction of the protective shell 17 under the action of the magnetic force, thereby achieving the effect of driving the sliding rod 14 to reset.

[0044] A pair of support frames 20 are fixed to the bottom of the inner wall of the protective shell 17, and a plurality of mounting frames 21 are fixed to the inner bottom surface of the receiving platform 25 at positions corresponding to the pull cables 18. The support frames 20 and the mounting frames 21 are both rotatably connected to guide wheels.

[0045] During operation, the design of the support frame 20 and the mounting frame 21 supports and steers the cable 18, thereby improving the stability of the equipment operation, reducing the wear of the cable 18, and increasing the service life of the equipment.

[0046] An elastic shielding cover 22 is provided on the outside of the mounting frame 21, and both ends of the elastic shielding cover 22 are fixedly connected to the housing 1 and the receiving platform 25 respectively;

[0047] During operation, excessive sand will fall into the receiving platform 25 through the filter screen 26. By designing an elastic shielding cover 22, the cable 18 passing through the receiving platform 25 and the mounting frame 21 arranged inside the receiving platform 25 are protected to avoid being affected by the sand, thereby further improving the stability of the equipment operation.

[0048] A plurality of elastic ropes 23 are fixed to the top surface of the inner wall of the elastic shielding cover 22 at positions corresponding to the mounting bracket 21. The bottom ends of the elastic ropes 23 are fixed to hollow counterweights 24. Cotton wool filled with lubricating oil is placed inside the hollow counterweights 24.

[0049] During operation, when the sand falls, it will hit the surface of the elastic shielding cover 22, thereby causing the elastic shielding cover 22 to vibrate, and the vibration of the elastic shielding cover 22 will drive the elastic rope 23 and the hollow counterweight block 24 to shake. When the hollow counterweight block 24 shakes, the lubricating oil stored inside it will be thrown out, and the thrown lubricating oil will drip onto the surface of the cable 18, thereby maintaining the cable 18 and improving the service life and stability of the equipment; it should be noted that the bottom surface of the cable 18 is closed, and a throwing outlet is opened on the side near the top.

[0050] The spreading blade 12 includes a fixed portion 1202, the top of which is slidably connected to a fanning portion 1201. An annular inflatable bag 27 is fixedly connected to the inside of the receiving platform 25 and below the filter screen 26.

[0051] During operation, in order to ensure that the throwing blade 12 has enough sand to be thrown when in use, an annular air bag 27 is designed. In actual use, the annular air bag 27 can be inflated as needed, thereby closing the filter 26, slowing down the falling speed of the sand, and causing a layer of sand to accumulate on the surface of the filter 26. At this time, the fan part 1201 is manually adjusted in advance so that the fan part 1201 slides on the fixed part 1202, thereby adjusting the length of the entire throwing blade 12, so that the throwing blade 12 can drive the sand on the surface of the filter 26 to fly when rotating, making the sand covering operation more comprehensive.

[0052] Working principle: When the embodiment of the present invention is in use, the sand-shooting nozzle 3 needs to be connected to the external sand supply device first, and then the staff opens the transparent door 2 to place the wax model that needs to be sand-coated on the support platform 4. It should be noted that when placing, the center of the packaged wax model and the center of the support platform 4 need to be in the same position as much as possible, and different wax models have different individual differences. Some wax models are too low in height. At this time, the jacking component can be started. The operation of the jacking component drives the sliding support platform 402 to move upward, thereby driving the wax model to move upward, and then the distance between the wax model and the sand-shooting nozzle 3 can be adjusted to ensure the effect of sand coating and improve the uniformity of sand coating on the wax model; after the position adjustment is completed, the sand-shooting nozzle 3 can be started to sandblast the wax model; it should be noted that, refer to the attached Figure 3 -Attached Figure 4 It can be seen that the sliding supports 402 can be designed to be multiple, and the multiple sliding supports 402 are slidably connected to each other, and the top surfaces of the sliding supports 402 are provided with card slots and card blocks, and the card slots and card blocks between the two mutually plugged sliding supports 402 correspond to each other. At the same time, the bottom ends of the sliding supports 402 are fixedly connected to a lifting ring, and the diameter of the lifting ring is larger than the diameter of the top surface of the sliding support 402. In this way, the sliding support 402 is limited when it slides upward, thereby preventing the two mutually plugged sliding supports 402 from separating, thereby improving the stability of equipment operation;

[0053] It should be noted that the driving component 9 is a prior art, and its specific implementation method can be a servo motor combined with four bevel gear sets, and then the bevel gear is connected to the rotating screw 8. This part is a prior art and will not be described in detail. During specific use, first start the driving component 9 to drive the rotating screw 8 to rotate. It should be noted that a limiting guide rail 10 is provided on the bottom surface of the inner wall of the shell 1, and the sliding block 5 is slidably connected to the limiting guide rail 10. Therefore, the rotation of the rotating screw 8 will drive the sliding block 5 to slide on the limiting guide rail 10. The sliding block 5 slides to adjust its position until it moves to the bottom of one of the sliding supports 402, and then the driving component 9 stops running. At this time, the telescopic rod 6 starts to drive the lifting block 7 to move, and the lifting block 7 moves so as to be aligned with the sliding support. 402 contacts and pushes the sliding support 402 to slide upward, thereby pushing the wax mold placed above the sliding support 402 to move upward; it should be noted that in the actual production process, the diameter of the wax mold is also inconsistent. When the sliding block 5 moves to the bottom of the sliding support 402, it is only necessary to ensure that the sliding support 402 is the smallest sliding support 402 that can stably support its wax mold. In this way, the contact area between the sliding support 402 and the bottom end of the wax mold can be minimized. In this way, the dead corner of sand covering caused by the bottom end of the wax mold being blocked by the support platform 4 in the prior art can be effectively eliminated, thereby achieving the effect of self-adjusting the height of the wax mold sand covering, and at the same time achieving the effect of eliminating the dead corner of the wax mold sand covering, further improving the comprehensiveness of the wax mold sand covering, and making the obtained sand mold more uniform;

[0054] Taking into account the situation that some wax models are wide at the top and narrow at the bottom, or wide at both ends and narrow in the middle, at this time, only covering the sand with the sand shooting nozzle 3 cannot achieve the effect of comprehensive sand covering, which affects the quality of the final model. For this reason, a throwing blade 12 is designed. It should be noted that the rotating component 13 includes a driving motor and a protective device for protecting the motor. This part is a prior art and will not be described in detail. In actual use, the rotating component 13 is started to drive the rotating shaft to rotate, and the rotation of the rotating shaft drives the throwing blade 12 to rotate. At this time, the sand material is ejected from the inside of the sand shooting nozzle 3, and part of the sand material will fall onto the surface of the throwing blade 12. The flipping of the throwing blade 12 will throw up this part of the sand material and throw it onto the surface of the wax model, thereby eliminating the dead angle of sand covering and improving the quality of molding.

[0055] By designing the receiving platform 25 and the filter 26, after the sand is sprayed, it is filtered by the filter 26 and falls into the receiving platform 25 so as to be collected centrally, which is convenient for the reuse of the sand. At the same time, it also delays the falling of the sand, providing a foundation for the throwing blade 12 to throw;

[0056] When the sliding support 402 moves upward, it means that the wax model is small at this time. At this time, the throwing position of the throwing blade 12 needs to be adaptively changed. During specific use, the pressing bevel block 16 will move downward as the sliding support 402 rises, and the pressing bevel block 16 moves to push the magnetic bevel block 15 to move. Since the contact surface between the magnetic bevel block 15 and the pressing bevel block 16 is an oblique angle, the magnetic bevel block 15 will slide horizontally at this time, thereby pushing the sliding rod 14 to move. The movement of the sliding rod 14 will drive the telescopic bracket 11 and the throwing blade 12 to move toward the direction of the sliding support 402, so that the throwing blade 12 is closer to the sliding support 402 and also closer to the wax model, so that the sand material thrown by the throwing blade 12 is closer to the wax model, thereby eliminating the dead corner of sand covering the wax model;

[0057] During the movement of the sliding block 5, it will simultaneously drive the cable 18 to move, and the movement of the cable 18 will drive the pressing bevel block 16 to stretch the return spring 19 downward and then move. This design makes it possible for the smaller the sliding support 402 is to move upward, the longer the movement stroke of the sliding block 5 will be, and thus the movement distance of the sliding rod 14 will be farther, thereby achieving the effect of automatically adjusting the movement amount of the sliding rod 14 to adapt to sliding supports 402 of different sizes; it should also be noted that a magnet with opposite magnetic properties is installed inside the protective shell 17 and at a position corresponding to the magnetic bevel block 15. Therefore, after the sliding block 5 is reset, the return spring 19 will pull the pressing bevel block 16 to reset. At this time, the magnetic bevel block 15 will move toward the direction of the protective shell 17 under the action of the magnetic force, thereby achieving the effect of driving the sliding rod 14 to reset;

[0058] The design of the support frame 20 and the mounting frame 21 supports and steers the cable 18, thereby improving the stability of the equipment operation, reducing the wear of the cable 18, and increasing the service life of the equipment;

[0059] Excessive sand will fall into the receiving platform 25 through the filter 26. The elastic shielding cover 22 is designed to protect the cable 18 passing through the receiving platform 25 and the mounting frame 21 arranged inside the receiving platform 25, thereby avoiding the influence of the sand and further improving the stability of the equipment operation.

[0060] When the sand material falls, it hits the surface of the elastic shielding cover 22, thereby causing the elastic shielding cover 22 to vibrate. The vibration of the elastic shielding cover 22 drives the elastic rope 23 and the hollow counterweight 24 to shake. When the hollow counterweight 24 shakes, the lubricating oil stored inside it is thrown out. The thrown lubricating oil drips on the surface of the cable 18, thereby maintaining the cable 18 and improving the service life and stability of the equipment. It should be noted that the bottom surface of the cable 18 is closed, and a throwing outlet is opened on the side near the top;

[0061] In order to ensure that the throwing blade 12 has enough sand to be thrown when in use, an annular air bag 27 is designed. In actual use, the annular air bag 27 can be inflated as needed, thereby closing the filter 26, slowing down the falling speed of the sand, and causing a layer of sand to accumulate on the surface of the filter 26. At this time, the fan part 1201 is manually adjusted in advance so that the fan part 1201 slides on the fixed part 1202, thereby adjusting the length of the entire throwing blade 12, so that the throwing blade 12 can drive the sand on the surface of the filter 26 to fly when rotating, making the sand covering operation more comprehensive.

[0062] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A wax mold sand coating machine, characterized by: It comprises a shell (1), the shell (1) is externally slidably connected to a transparent door (2), a sand-shooting nozzle (3) is mounted on the top of the shell (1), and a support platform (4) is provided below the sand-shooting nozzle (3); The support platform (4) includes a limit platform (401) fixed to the inner bottom surface of the shell (1), and also includes a plurality of sliding support platforms (402) plugged into each other; A jacking assembly is provided below the support platform (4), and the jacking assembly includes a jacking block (7). The jacking assembly drives the sliding support platform (402) to slide up and down through the jacking block (7); A plurality of retractable telescopic brackets (11) are provided inside the housing (1) and outside the support platform (4); a rotating shaft is rotatably connected inside the telescopic bracket (11); a plurality of spray blades (12) are fixedly connected to the outside of the rotating shaft; a rotating assembly (13) is installed outside the telescopic bracket (11); an output end of the rotating assembly (13) is connected to the spray blades (12); The end of the telescopic bracket (11) away from the support platform (4) is fixedly connected to a sliding rod (14), the sliding rod (14) passes through the housing (1) and is slidably connected thereto, the end of the sliding rod (14) away from the telescopic bracket (11) is fixedly connected to a magnetic bevel block (15), and the side of the magnetic bevel block (15) away from the telescopic bracket (11) is slidably connected to a liftable pressing bevel block (16); A pull rope (18) is fixedly connected between the pressing bevel block (16) and the sliding block (5), a return spring (19) is fixedly connected to the top of the pressing bevel block (16), a protective shell (17) is fixedly connected to the outside of the return spring (19), and the protective shell (17) is fixedly connected to the housing (1).

2. A wax mold sand coating machine according to claim 1, characterized in that: The lifting assembly also includes a driving assembly (9), wherein a plurality of rotating screws (8) are installed at the output end of the driving assembly (9), and the external portion of the rotating screws (8) is connected to a sliding block (5) via a thread, and the bottom end of the sliding block (5) is slidably connected to a limiting guide rail (10), and the limiting guide rail (10) is fixedly connected to the housing (1), and the top end of the sliding block (5) is fixedly connected to a telescopic rod (6), and the output end of the telescopic rod (6) is fixedly connected to the lifting block (7).

3. A wax mold sand coating machine according to claim 2, characterized in that: A material receiving platform (25) is fixedly connected between the support platform (4) and the shell (1), and a filter screen (26) is fixedly connected to the top of the material receiving platform (25).

4. A wax mold sand coating machine according to claim 3, characterized in that: A pair of support frames (20) are fixedly connected to the bottom of the inner wall of the protective shell (17), and a plurality of mounting frames (21) are fixedly connected to the inner bottom surface of the material receiving platform (25) and at positions corresponding to the cable (18). The interiors of the support frames (20) and the mounting frames (21) are both rotatably connected to guide wheels.

5. The wax mold sand coating machine according to claim 4, characterized in that: An elastic shielding cover (22) is provided outside the mounting frame (21), and two ends of the elastic shielding cover (22) are fixedly connected to the housing (1) and the material receiving platform (25), respectively.

6. The wax mold sand coating machine according to claim 5, characterized in that: A plurality of elastic ropes (23) are fixedly connected to the top surface of the inner wall of the elastic shielding cover (22) at a position corresponding to the mounting frame (21), and a hollow counterweight (24) is fixedly connected to the bottom end of the elastic rope (23). Cotton wool filled with lubricating oil is placed inside the hollow counterweight (24).

7. A wax pattern sand coating machine according to claim 6, characterized in that: The throwing blade (12) comprises a fixed portion (1202), the top end of the fixed portion (1202) being slidably connected to a fanning portion (1201), and an annular inflatable bag (27) being fixedly connected inside the receiving platform (25) and below the filter screen (26).

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