A vacuum slurry dipping equipment for investment casting

Abstract

The present invention relates to the technical field of casting equipment, and in particular to a vacuum slurrying equipment for investment casting, comprising a frame, a slurry barrel bottom support mechanism, a rotary bearing with an external gear, a slurry barrel with an annular sealing flange, a slurry barrel rotation drive mechanism, a floating support mechanism, an intermediate sealing ring, a floating support unit, a cover plate, a sealing downward pressure drive mechanism, a protective ring, a swinging drive mechanism, a stirring member, a vacuuming mechanism, a hanging mechanism, and an automatic liquid replenishing mechanism. The vacuum slurrying equipment of the present application has a simple structure, and is convenient for slurrying operation and maintenance. When removing a workpiece, it can prevent the intermittent dripping of slurry from the removed workpiece onto the intermediate sealing ring and affect the sealing of the next vacuuming operation, and the protective ring is easy to clean; automatic liquid replenishment after each vacuuming maintains the stability and life of the slurry.

Description

Technical Field

[0001] The invention relates to the technical field of casting equipment, in particular to a vacuum slurry dipping equipment for investment casting. Background Art

[0002] The working principles of several investment casting vacuum slurry dipping machines currently on the market are as follows: a metal sealed container with an opening on the top or side is made, a slurry barrel is rotatably set in the metal sealed container, and the workpiece is immersed in the slurry in the slurry barrel for vacuuming. Its double-layer structure makes it inconvenient to maintain the sealed L mixer or hanging mechanism. At the same time, there will be a gap between the metal sealed container and the slurry barrel. The gap is narrow, and the slurry that drips intermittently when the workpiece is taken out during operation will inevitably fall into it, or drip on the top surface or the downward position of the side opening where the workpiece enters and exits. Firstly, it is very troublesome to clean up, and secondly, it affects the life of the machine over time. At the same time, the slurry used for investment casting, during the vacuum operation, the moisture and volatile solvent in the coating are partially extracted. Since the existing vacuum slurry dipping machine cannot replenish the liquid in time, the slurry quality is reduced, the slurry coating performance is reduced, and the stability is deteriorated.

[0003] Among the existing patents, the Chinese patent document with application number 202210992460.1 discloses a fully automatic vacuum precision casting slurry dipping machine, which discloses that the first vacuum slurry dipping tank includes a tank body with an open end, a tank cover arranged at the opening of the tank body, a first rotating shaft rotatably arranged on the tank body or the tank cover, a plurality of second rotating shafts rotatably arranged on the first rotating shaft, a clamping mechanism arranged at one end of the second rotating shaft away from the first rotating shaft, a first rotating drive mechanism for driving the first rotating shaft to rotate, and a second rotating drive mechanism for driving the second rotating shaft to rotate, the output end of the vacuum generating device is connected to the interior of the tank body, the rotation direction of the first rotating shaft is cross-arranged with the rotation direction of the second rotating shaft, the first vacuum slurry dipping tank also includes a barrel body rotatably arranged in the tank body and a third rotating drive mechanism for driving the barrel body to rotate, the barrel body is a structure with an open end, and the opening of the barrel body is facing the opening of the tank body. It can be seen from this that the first vacuum immersion tank has a double-layer structure of a barrel and a tank body. During operation, the slurry can easily fall into the gap between the barrel and the tank body, which is inconvenient or even impossible to clean, and can easily cause machine failure or damage.

[0004] Therefore, the defects are very obvious and a solution is urgently needed. Summary of the Invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a vacuum slurry dipping equipment for investment casting.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The cam is secured to the bottom of the frame and has an angular channel that is adapted to move the cam forwardly and downwardly through the centre of the frame to move the cam forwardly and downwardly through the centre of the frame. The stirring member, vacuum mechanism and hanging mechanism are installed on the middle sealing ring, the annular sealing flange at the top of the pulp barrel is installed on the outer ring of the rotary bearing with an external gear, the vacuum mechanism is connected to the inner cavity of the middle sealing ring, and the hanging end of the hanging mechanism can protrude into the inner cavity of the middle sealing ring; the cover plate is located on one side of the protective ring, and the stirring member is inserted into the pulp barrel; when the protective ring is located above the middle sealing ring, the cover plate is located on the outside of the middle sealing ring; when the cover plate is located above the middle sealing ring, the protective ring is located on the outside of the middle sealing ring, the sealing downward pressure driving mechanism is used to apply downward pressure to the cover plate to press the cover plate, the middle sealing ring and the annular sealing flange of the pulp barrel tightly together, the cover plate and the middle sealing ring, and the middle sealing ring and the annular sealing flange of the pulp barrel are sealed via sealing rings respectively, the automatic liquid replenishing mechanism is used to replenish liquid into the pulp barrel, and the pulp barrel rotation driving mechanism is used to drive the pulp barrel to rotate.

[0008] Furthermore, the cover plate is equipped with a pressure gauge and / or an observation window.

[0009] Furthermore, the floating cover plate, the floating middle sealing ring, the annular sealing flange of the pulp barrel and the two sealing rings therein are pressed together by the sealing pressing drive mechanism to form a sealing body.

[0010] Furthermore, the cover plate is hinged with a linkage rod, and the end of the linkage rod away from the cover plate is hinged to the protective ring. The quadrilateral hinge structure formed by the cover plate, the protective ring and the linkage rod arranged on the floating support mechanism swings under the drive of the swing drive mechanism; when the protective ring is located above the middle sealing ring, the cover plate is located on the outside of the middle sealing ring; when the cover plate is located above the middle sealing ring, the protective ring is located on the outside of the middle sealing ring, and the sealing downward pressure drive mechanism is used to apply downward pressure to the cover plate to tightly press the cover plate, the middle sealing ring and the annular sealing flange of the pulp barrel together.

[0011] Furthermore, the floating support mechanism includes a plurality of floating support modules arranged outside the circumference of the rotary bearing with an external gear, the floating support module including a guide rod mounted on the frame, a first spring mounted outside the guide rod, a first ball sleeve mounted outside the guide rod, and a limit plate mounted on the top end of the guide rod, the intermediate sealing ring is connected to the outer sleeve of the first ball sleeve, the first spring is clamped between the first ball sleeve and the frame, and the first ball sleeve is located between the limit plate and the first spring; the floating support unit includes a guide column connected to the guide rod of one of the floating support modules, a second spring mounted at the connection between the guide column and the guide rod, a second ball sleeve mounted outside the guide column, a third spring mounted outside the guide column, and a limit piece mounted on the top end of the guide column, the cover plate is mounted on the outer sleeve of the second ball sleeve, the limit piece, the adapter of the sealing downward pressure drive mechanism, the third spring, the second ball sleeve, the second spring and the corresponding floating support module are arranged in sequence from top to bottom.

[0012] Furthermore, the pulp barrel bottom support mechanism is composed of a pulp barrel support plate, an upper connecting plate of the end bearing, an end bearing and a lower connecting plate of the end bearing. The pulp barrel support plate, the upper connecting plate of the end bearing, the end bearing and the lower connecting plate of the end bearing are arranged in sequence from top to bottom between the bottom of the pulp barrel and the center position of the bottom of the frame.

[0013] Furthermore, the swing drive mechanism includes a first connecting plate connected to the cover plate, a second connecting plate connected to the protective ring, a first hinge shaft arranged on the first connecting plate, a second hinge shaft arranged on the second connecting plate and a swing drive module arranged on the frame. The driving end of the swing drive module is hinged to the first connecting plate or the second connecting plate, and the two ends of the linkage rod are respectively equipped with a first hinge sleeve and a second hinge sleeve. The first hinge sleeve is movably arranged outside the first hinge shaft, and the second hinge sleeve is movably arranged outside the second hinge shaft. The first connecting plate is rotatably connected to the floating support unit, and the second connecting plate is rotatably connected to the top of the floating support mechanism.

[0014] Furthermore, the swing drive module includes a rotating gear arranged on the cover plate, a fixed seat installed on the floating support mechanism, a driving rod slidably connected to the fixed seat and a rack arranged on the driving rod, the rack is engaged with the rotating gear for transmission, the rotating gear is rotatably arranged on the fixed seat, and the cover plate is coaxial with the rotating shaft of the floating support unit and the central axis of the rotating gear.

[0015] Furthermore, the number of the hanging mechanisms is one or more, and the hanging mechanisms include a catheter installed outside the middle sealing ring, a hanging rod slidably connected to the inner cavity of the catheter, and a movable driver installed outside the middle sealing ring, and the movable end of the movable driver is fixedly connected to one end of the hanging rod; the movable driver is used to drive the hanging rod to retract into the catheter or drive the hanging rod to insert into the inner cavity of the middle sealing ring.

[0016] Furthermore, the sealing downward pressure driving mechanism includes a rotating arm and a sealing downward pressure driver, one end of the rotating arm is rotatably connected to the floating support unit, the sealing downward pressure driver is installed at the other end of the rotating arm, and the downward pressure end of the sealing downward pressure driver is connected to the cover plate.

[0017] The beneficial effects of the present invention are as follows: in actual application, when the cover is in the open state, the cover is located on the outside of the middle sealing ring, and the protective ring is located above the middle sealing ring. The protective ring protects the top surface of the middle sealing ring, preventing the slurry that drips intermittently when the workpiece is taken out from falling onto the top surface of the middle sealing ring, which is not only convenient for cleaning, but also ensures the sealing performance when the middle sealing ring and the cover are closed; the slurry barrel rotation drive mechanism drives the slurry barrel to rotate, and since the stirring member is fixed on the inner wall of the middle sealing ring, the stirring member stirs the slurry in the slurry barrel, making the slurry uniform and avoiding slurry precipitation. The middle sealing ring floats under the action of the spring of the floating support mechanism, making the middle The sealing ring is separated from the annular sealing flange of the slurry barrel to avoid friction between the annular sealing flange of the slurry barrel and the middle sealing ring when the slurry barrel rotates, reducing the friction force of the slurry barrel during rotation, and making the rotation of the slurry barrel smooth. When the workpiece needs to be hung on the hanging end of the hanging mechanism, the hanging end of the hanging mechanism protrudes into the inner cavity of the middle sealing ring, the slurry barrel rotation drive mechanism stops driving the slurry barrel to rotate, and the operator or the manipulator hangs the workpiece on the hanging end of the hanging mechanism so that the workpiece extends into the slurry in the slurry barrel. At this time, the swing drive mechanism drives the cover plate and the protective ring to swing synchronously, so that the protective ring is transferred to the outside of the middle sealing ring, and the cover plate is transferred to the top of the middle sealing ring and covers the top of the middle sealing ring. The sealing downward pressure driving mechanism applies downward pressure to the cover plate, so that the cover plate overcomes the buoyancy of the floating support unit and moves downward toward the middle sealing ring, thereby causing the cover plate to apply downward pressure to the middle sealing ring, and the middle sealing ring overcomes the buoyancy of the floating support mechanism and moves downward toward the annular sealing flange close to the slurry barrel, until the sealing downward pressure driving mechanism presses the cover plate, the middle sealing ring and the annular sealing flange of the slurry barrel tightly together and deforms the sealing ring to form a sealed space above the slurry barrel. At this time, the vacuuming mechanism vacuums the sealed space in the slurry barrel, thereby performing vacuum slurrying operation on the workpiece. After the vacuum slurrying is completed, the downward pressure of the sealing downward pressure driving mechanism is released, and the cover plate is on the floating support unit. The middle sealing ring moves up under the buoyancy of the floating support mechanism and separates from the annular sealing ring of the slurry barrel. At this time, the swing drive mechanism drives the cover plate and the protective ring to swing synchronously, so that the cover plate swings to the outside of the middle sealing ring to open the top port of the middle sealing ring, and the protective ring is transferred to the top of the middle sealing ring to protect the top surface of the middle sealing ring. The operator or the manipulator can take out the workpiece after vacuum slurrying from the hanging end of the hanging mechanism. In the process of taking out the workpiece, even if the slurry falls onto the protective ring, it will not affect the sealing performance of the middle sealing ring, and it is convenient to clean the slurry on the protective ring.In addition, in order to facilitate the separation of the cover plate, the middle sealing ring and the annular sealing flange of the pulp barrel, the sealed space is broken into vacuum before or when the downward pressure of the sealing downward pressure driving mechanism is released, so that the buoyancy of the floating support unit and the floating support mechanism can separate the cover plate, the middle sealing ring and the annular sealing flange from each other. After the vacuuming is completed, there is a delay of several seconds, and the pulp barrel rotation driving mechanism drives the pulp barrel to rotate again, and the automatic liquid replenishing mechanism automatically replenishes the pulp barrel in time. The vacuum pulping equipment of the present invention is simpler than the double-layer vacuum pulping equipment currently on the market, and is easy to operate and maintain. It is easy to clean the protective ring, reduces the failure rate, has a long service life, and can cooperate with a manipulator to complete automatic pulping; automatic liquid replenishment maintains the stability and quality of the pulp. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a usage state of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of another usage state of the present invention.

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the floating support unit, the sealing downward pressure drive mechanism and the floating support module of the present invention.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the swing drive mechanism, cover plate, protective ring, floating support unit and seal pressing drive mechanism in embodiment 1 of the present invention.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the swing drive mechanism, cover plate, protective ring and seal pressing drive mechanism in the second embodiment of the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the intermediate sealing ring, the hanging mechanism and the stirring member of the present invention.

[0024] Figure 7 It is a three-dimensional structural schematic diagram of the frame, the slewing bearing with an external gear, the pulp barrel bottom support mechanism, and the pulp barrel rotation drive mechanism of the present invention.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the pulp barrel with an annular sealing flange of the present invention.

[0026] Description of reference numerals:

[0027] 1. Frame; 10. Bottom support mechanism of pulp drum; 11. Protective ring; 12. Cover plate; 13. Stirring element; 14. Vacuuming mechanism; 15. Pulp drum; 16. Sealing ring; 17. Pressure gauge; 18. Observation window; 19. Intermediate sealing ring; 2. Hanging mechanism; 21. Conduit; 22. Hanging rod; 23. Movable actuator; 24. Second magnetic induction switch; 3. Rotary bearing; 4. Pulp drum rotation drive mechanism; 39. Inner ring of rotary bearing; 40. Ball bearing of rotary bearing; 41. Outer ring of slewing bearing; 42. Transmission unit; 43. Transmission gear; 5. Floating support mechanism; 51. Floating support module; 52. Guide rod; 53. First spring; 54. First ball bearing; 55. Limit plate; 6. Automatic liquid replenishing mechanism; 61. Liquid storage tank; 62. Liquid replenishing tube; 63. Liquid extraction tube; 64. Liquid extraction pump; 7. Floating support unit; 71. Guide column; 72. Second spring; 73. Second ball bearing; 74. Third spring; 75. Limit member; 8. Swing drive mechanism; 81. Linkage rod; 82. First connecting plate; 83. Second connecting plate; 84. First articulated shaft; 85, second articulated shaft; 86, swing drive module; 861, support; 862, telescopic drive; 863, third articulated shaft; 864, third articulated sleeve; 865, first magnetic switch; 867, rotating gear; 868, fixed seat; 869, drive rod; 8691, rack; 87, first articulated sleeve; 88, second articulated sleeve; 9, sealed downward pressure drive mechanism; 91, rotating arm; 92, sealed downward pressure drive; 111, pulp barrel support plate; 112, end bearing upper connecting plate; 113, end bearing; 114, end bearing lower connecting plate. DETAILED DESCRIPTION

[0028] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0029] Example 1.

[0030] like Figure 1 、 2, 3, 4, 6, 7 and 8, the present invention provides a kind of investment casting vacuum slurrying equipment capable of immersing the mud shell into refractory mud for vacuum slurrying operation, which includes a frame 1, a slurry barrel 15 with an annular sealing flange, a rotary bearing 3 with an external gear whose inner ring is mounted on the frame 1, a slurry barrel bottom support mechanism 10 arranged at the top of the bottom center of the frame 1 and arranged at the bottom of the supporting slurry barrel 15, a slurry barrel rotation drive mechanism 4 arranged on the frame 1, a floating support mechanism 5 installed on the frame 1 and located outside the circumference of the rotary bearing 3 with an external gear, and a floating support mechanism 5 installed on the floating support The support mechanism 5 is provided with an intermediate sealing ring 19 above the annular sealing flange of the pulp barrel 15, a floating support unit 7 arranged on the top of the floating support mechanism 5, a cover plate 12 rotatably arranged on the floating support unit 7, a sealing pressing driving mechanism 9 rotatably connected to the top of the floating support unit 7 and driven by the cover plate 12, a protective ring 11 rotatably connected to the frame 1 or the top of the floating support mechanism 5, a swing driving mechanism 8 installed on the frame 1 and used to drive the cover plate 12 and the protective ring 11 to swing synchronously, an automatic liquid replenishing mechanism 6 installed on the outside of the frame 1 and The stirring member 13, vacuum mechanism 14 and hanging mechanism 2 are installed on the middle sealing ring 19, and the annular sealing flange at the top of the pulp barrel 15 is installed on the outer ring 41 of the rotary bearing with an external gear. The vacuum mechanism 14 is connected to the inner cavity of the middle sealing ring 19, and the hanging end of the hanging mechanism 2 can protrude into the inner cavity of the middle sealing ring 19; the cover plate 12 is located on one side of the protective ring 11, and the stirring member 13 is inserted into the pulp barrel 15; when the protective ring 11 is located above the middle sealing ring 19, the cover plate 12 is located on the outside of the middle sealing ring 19; when the cover plate 12 is located on the middle sealing ring When the cover plate 12 is above the sealing ring 19, the protective ring 11 is located on the outside of the intermediate sealing ring 19. The sealing downward pressure driving mechanism 9 is used to apply downward pressure to the cover plate 12 to tightly press the cover plate 12, the intermediate sealing ring 19 and the annular sealing flange of the pulp barrel 15 together. The cover plate 12 and the intermediate sealing ring 19, and the intermediate sealing ring 19 and the annular sealing flange of the pulp barrel 15 are respectively sealed and connected via sealing rings 16. The automatic liquid replenishing mechanism 6 is used to replenish liquid into the pulp barrel 15, and the pulp barrel rotation driving mechanism 4 is used to drive the pulp barrel 15 to rotate; preferably, the stirring member 13 is L-shaped.

[0031] In actual application, when the cover plate 12 is in the open state, the cover plate 12 is located on the outside of the intermediate sealing ring 19, and the protective ring 11 is located above the intermediate sealing ring 19. The protective ring 11 protects the top surface of the intermediate sealing ring 19 to prevent the slurry that drips intermittently when the workpiece is taken out from the top surface of the intermediate sealing ring 19. It is not only convenient to clean, but also ensures the sealing performance when the intermediate sealing ring 19 and the cover plate 12 are covered. The slurry barrel rotation drive mechanism 4 drives the slurry barrel 15 to rotate. Since the stirring member 13 is fixed on the inner wall of the intermediate sealing ring 19, the stirring member 13 stirs the slurry in the slurry barrel 15 to make the slurry uniform and avoid slurry precipitation. The intermediate sealing ring 19 floats under the action of the floating support mechanism 5, so that the intermediate sealing ring 19 and the intermediate sealing ring 19 are The annular sealing flange of the slurry barrel 15 is separated to avoid friction and wear between the annular sealing flange of the slurry barrel 15 and the intermediate sealing ring 19 when rotating, thereby reducing the friction force of the slurry barrel 15 during rotation, and making the rotation of the slurry barrel 15 smooth. When the workpiece needs to be hung on the hanging end of the hanging mechanism 2, the hanging end of the hanging mechanism 2 protrudes into the inner cavity of the intermediate sealing ring 19, and the slurry barrel rotation drive mechanism 4 stops driving the slurry barrel 15 to rotate. The operator or the manipulator hangs the workpiece on the hanging end of the hanging mechanism 2, so that the workpiece extends into the slurry in the slurry barrel 15. At this time, the swing drive mechanism 8 drives the cover plate 12 and the protective ring 11 to swing synchronously, so that the protective ring 11 is transferred to the outside of the intermediate sealing ring 19, and the cover plate 12 is transferred to the top of the intermediate sealing ring 19 and covers the intermediate sealing ring 19, and then the sealing downward pressure driving mechanism 9 applies downward pressure to the cover plate 12, so that the cover plate 12 overcomes the buoyancy of the floating support unit 7 and moves downward toward the middle sealing ring 19, thereby causing the cover plate 12 to apply downward pressure to the middle sealing ring 19, and the middle sealing ring 19 overcomes the buoyancy of the floating support mechanism 5 and moves downward toward the annular sealing flange of the slurry barrel 15, until the sealing downward pressure driving mechanism 9 presses the cover plate 12, the middle sealing ring 19 and the annular sealing flange of the slurry barrel 15 tightly together, and deforms the sealing ring 16 to form a sealed space above the slurry barrel 15. At this time, the vacuuming mechanism 14 vacuums the sealed space in the slurry barrel 15, thereby performing vacuum slurrying operation on the workpiece. After the vacuum slurrying is completed, the downward pressure of the sealing downward pressure driving mechanism 9 is released. In addition, the cover plate 12 moves up under the buoyancy of the floating support unit 7 and separates from the intermediate sealing ring 19. The intermediate sealing ring 19 moves up under the buoyancy of the floating support mechanism 5 and separates from the annular sealing flange of the slurry barrel 15. At this time, the swing drive mechanism 8 drives the cover plate 12 and the protective ring 11 to swing synchronously, so that the cover plate 12 moves to the outside of the intermediate sealing ring 19 to open the top port of the intermediate sealing ring 19, and the protective ring 11 moves to the top of the intermediate sealing ring 19 to protect the top surface of the intermediate sealing ring 19. The operator or the manipulator can take out the workpiece after vacuum slurrying from the hanging end of the hanging mechanism 2. In the process of taking out the workpiece, even if the slurry falls onto the protective ring 11, it will not affect the sealing performance of the intermediate sealing ring 19.This also facilitates cleaning the slurry on the protective ring 11. Furthermore, to facilitate the separation of the annular sealing flanges of the cover plate 12, the intermediate sealing ring 19, and the slurry barrel 15, the sealed space is vacuumed before or before the downward pressure of the sealing downward pressure drive mechanism 9 is released, allowing the buoyancy of the floating support unit 7 and the floating support mechanism 5 to separate the annular sealing flanges of the cover plate 12, the intermediate sealing ring 19, and the slurry barrel 15. After a delay of several seconds, the slurry barrel rotation drive mechanism 4 drives the slurry barrel 15 to rotate again, and the liquid pump 64 of the automatic liquid replenishment mechanism 6 automatically replenishes the slurry barrel in a timely manner.

[0032] In this embodiment, a slurry barrel bottom support mechanism 10 is provided at the bottom of the slurry barrel 15. The slurry barrel bottom support mechanism 10 comprises a slurry barrel support plate 111, an upper connecting plate 112 for the end bearing, an end bearing 113, and a lower connecting plate 114 for the end bearing. The slurry barrel support plate 111, the upper connecting plate 112 for the end bearing, the end bearing 113, and the lower connecting plate 114 for the end bearing are sequentially connected from top to bottom between the bottom of the slurry barrel 15 and the bottom center of the frame 1. This structural design ensures that the bulk of the weight of the slurry barrel 15 is borne by the slurry barrel bottom support mechanism 10, while the slewing bearing 3 connected to the slurry barrel 15 bears less weight. The slurry barrel rotation drive mechanism 4 drives the slewing bearing 3 to drive the slurry barrel 15 to rotate smoothly.

[0033] In this embodiment, the cover plate 12 and the intermediate sealing ring 19, and the intermediate sealing ring 19 and the annular sealing flange of the pulp barrel 15 are respectively sealed via sealing rings 16. When the cover plate 12, the intermediate sealing ring 19 and the annular sealing flange of the pulp barrel 15 are tightly pressed together, the sealing ring 16 seals the gaps between the cover plate 12, the intermediate sealing ring 19 and the annular sealing flange of the pulp barrel 15, so that the floating cover plate 12, the floating intermediate sealing ring 19, the annular sealing flange of the pulp barrel 15 and the two sealing rings 16 therein form a sealed body after the sealing pressing drive mechanism 9 is pressed together, further improving the sealing effect.

[0034] In this embodiment, the cover plate 12 is hinged with a linkage rod 81, and the end of the linkage rod 81 away from the cover plate 12 is hinged to the protective ring 11. The quadrilateral hinged structure formed by the cover plate 12, the protective ring 11 and the linkage rod 81 arranged on the floating support mechanism 5 swings under the drive of the swing drive mechanism 8; when the protective ring 11 is located above the intermediate sealing ring 19, the cover plate 12 is located on the outside of the intermediate sealing ring 19; when the cover plate 12 is located above the intermediate sealing ring 19, the protective ring 11 is located on the outside of the intermediate sealing ring 19, and the sealing downward pressure drive mechanism 9 is used to apply downward pressure to the cover plate 12 to tightly press the cover plate 12, the intermediate sealing ring 19 and the annular sealing flange of the pulp barrel 15 together.

[0035] In this embodiment, the swing drive mechanism 8 includes a first connecting plate 82 connected to the cover plate 12, a second connecting plate 83 connected to the protective ring 11, a first hinge shaft 84 arranged on the first connecting plate 82, a second hinge shaft 85 arranged on the second connecting plate 83 and a swing drive module 86 arranged on the frame 1. The driving end of the swing drive module 86 is hinged to the first connecting plate 82 or the second connecting plate 83, and the two ends of the linkage rod 81 are respectively equipped with a first hinge sleeve 87 and a second hinge sleeve 88. The first hinge sleeve 87 is movably mounted outside the first hinge shaft 84, and the second hinge sleeve 88 is movably mounted outside the second hinge shaft 85. The first connecting plate 82 is rotatably connected to the floating support unit 7, and the second connecting plate 83 is rotatably connected to the top of the floating support mechanism 5; the first hinge shaft 84 on the first connecting plate 82 can slide up and down relative to the first hinge sleeve 87, and the second hinge shaft 85 on the second connecting plate 83 can slide up and down relative to the second hinge sleeve 88.

[0036] Take the example of the driving end of the swing drive module 86 being hinged to the first connecting plate 82; in actual application, the swing drive module 86 drives the first connecting plate 82 to swing relative to the floating support unit 7, and the swinging first connecting plate 82 drives the cover plate 12 to swing, so that the cover plate 12 swings to the top of the intermediate sealing ring 19 or rotates away from the intermediate sealing ring 19. During the swinging process of the cover plate 12, the cover plate 12 drives the protective ring 11 to swing synchronously via the linkage rod 81, so that the protective ring 11 rotates away from the intermediate sealing ring 19 or swings to the top of the intermediate sealing ring 19; when the cover plate 12 is located above the intermediate sealing ring 19, the sealing downward pressure drive mechanism 9 applies downward pressure to the cover plate 12, so that the cover plate 12 can drive the intermediate sealing ring 19 to move downward, and during the downward movement of the cover plate 12, the first hinge shaft 84 on the first connecting plate 82 slides downward relative to the first hinge sleeve 87, so that the cover plate 12 can slide up and down relative to the linkage rod 81, ensuring that the linkage rod 81 can normally connect the cover plate 12 and the protective ring 11 together.

[0037] In this embodiment, the swing drive module 86 includes a support 861, a telescopic actuator 862, a third hinge shaft 863, and a third hinge sleeve 864. The support 861 is mounted on the frame 1, the third hinge sleeve 864 is mounted on the telescopic rod of the telescopic actuator 862, the third hinge shaft 863 is mounted on the first connecting plate 82, and the third hinge sleeve 864 is movably mounted on the third hinge shaft 863. The main body of the telescopic actuator 862 is hingedly connected to the support 861. Specifically, the telescopic actuator 862 can be a pneumatic cylinder, an oil cylinder, or an electric cylinder. In actual use, the telescopic rod of the telescopic actuator 862 extends and retracts to drive the first connecting plate 82 to swing, and the swinging first connecting plate 82 drives the cover plate 12 to swing back and forth. As the cover plate 12 moves downward, the third hinge shaft 863 on the first connecting plate 82 slides downward relative to the third hinge sleeve 864. This structural design ensures that the upward and downward movement of the cover plate 12 does not affect the normal operation of the telescopic actuator 862.

[0038] Specifically, the telescopic rod of the telescopic actuator 862 is equipped with a first magnetic ring, and the main body of the telescopic actuator 862 is equipped with two first magnetic switches 865. The first magnetic ring is movable and disposed between the two first magnetic switches 865, and the first magnetic switches 865 are electrically connected to the telescopic actuator 862. In actual use, during the reciprocating movement of the telescopic rod of the telescopic actuator 862, the first magnetic ring is used to trigger one of the first magnetic switches 865 to ensure the telescopic travel of the telescopic rod of the telescopic actuator 862, thereby ensuring the reciprocating swing angle of the cover plate 12 and the protective ring 11, and simultaneously outputting a position control signal.

[0039] In this embodiment, the cover plate 12 is equipped with a pressure gauge 17 and / or an observation window 18. The pressure gauge 17 can display the pressure and vacuum level in the slurry barrel 15. The observation window 18 facilitates the operator to observe the workpiece in the slurry barrel 15 in real time.

[0040] In this embodiment, the seal-pressing mechanism 9 includes a rotating arm 91 and a seal-pressing actuator 92. One end of the rotating arm 91 is rotatably connected to the floating support unit 7, while the seal-pressing actuator 92 is mounted on the other end of the rotating arm 91. The pressing end of the seal-pressing actuator 92 is connected to the cover plate 12. Specifically, the rotating arm 91 is rotatably sleeved outside the guide post 71 of the floating support unit 7. This structural design ensures that the seal-pressing mechanism 9 can move synchronously with the cover plate 12.

[0041] Specifically, the seal pressing down driver 92 can be a hydraulic cylinder or a jack. When the seal pressing down driver 92 is a hydraulic cylinder, it has a large bearing capacity, a high degree of automation, and high efficiency. When the seal pressing down driver 92 is a jack, especially a thin jack, it has low cost and is only suitable for small pulp barrels.

[0042] In this embodiment, the number of the hanging mechanism 2 is one or more, and the hanging mechanism 2 includes a conduit 21 installed outside the intermediate sealing ring 19, a hanging rod 22 slidably connected to the inner cavity of the conduit 21, and a movable driver 23 installed outside the intermediate sealing ring 19, wherein the movable end of the movable driver 23 is fixedly connected to one end of the hanging rod 22; the movable driver 23 is used to drive the hanging rod 22 to retract into the conduit 21 or to drive the hanging rod 22 to insert into the inner cavity of the intermediate sealing ring 19. The movable driver 23 can be a linear motion module such as an air cylinder, an oil cylinder, an electric cylinder, or a manual gear rack. In actual application, the movable driver 23 drives the hanging rod 22 to slide back and forth linearly relative to the conduit 21, so that the hanging rod 22 retracts into the conduit 21 to facilitate operations such as cleaning the slurry barrel 15 or adding slurry, or the hanging rod 22 extends into the inner cavity of the intermediate sealing ring 19 to facilitate the hanging of the workpiece on the hanging rod 22.

[0043] Preferably, there are two hanging mechanisms 2, which are arranged opposite each other. The end of the hanging rod 22 of one hanging mechanism 2 is provided with a protruding block, and the end of the hanging rod 22 of the other hanging mechanism 2 is provided with a recessed hole, with the protruding block fitting in the recessed hole. This structural design allows for the heads of the two hanging rods 22 to be joined when the two hanging rods 22 are inserted into the inner cavity of the intermediate sealing ring 19. The two hanging rods 22 of the two hanging mechanisms 2 are relatively supported, thereby increasing the strength of the hanging rods 22 for hanging workpieces and preventing deformation of the hanging rods 22.

[0044] Specifically, the movable end of the mobile actuator 23 is equipped with a second magnetic ring, and the main body of the mobile actuator 23 is equipped with two second magnetic switches 24. The second magnetic ring is movably positioned between the two second magnetic switches 24, and the second magnetic switches 24 are electrically connected to the mobile actuator 23. When the mobile actuator 23 drives the hanging rod 22 to reciprocate, the second magnetic ring is used to trigger one of the second magnetic switches 24 to ensure the travel range of the mobile actuator 23, thereby ensuring the position accuracy of the reciprocating movement of the hanging rod 22 and the output of the point control signal.

[0045] In this embodiment, the investment casting vacuum slurry dipping apparatus further includes an automatic liquid replenishing mechanism 6 disposed outside the slurry barrel 15. The automatic liquid replenishing mechanism 6 is used to replenish liquid into the slurry barrel 15. In actual applications, when the vacuuming mechanism 14 evacuates the slurry barrel 15, the negative pressure removes some water and volatile solvents, thereby reducing the stability of the slurry and deteriorating its coating properties. Therefore, the automatic liquid replenishing mechanism 6 replenishes liquid into the slurry barrel 15 to replace the liquid lost due to the negative pressure and maintain the concentration and composition of the coating.

[0046] Specifically, the automatic liquid replenishing mechanism 6 includes a liquid storage barrel 61 located outside the slurry barrel 15, a liquid replenishing pipe 62 that sealably passes through the intermediate sealing ring 19, a liquid extraction pipe 63 inserted into the liquid storage barrel 61, and a liquid extraction pump 64 connected to the liquid extraction pipe 63 and the liquid replenishing pipe 62. In actual application, the liquid extraction pump 64 extracts liquid from the liquid storage barrel 61 through the liquid extraction pipe 63 and supplies the extracted liquid to the slurry barrel 15 through the liquid replenishing pipe 62, so as to automatically replenish the liquid into the slurry barrel 15.

[0047] Preferably, a liquid level sensor or a liquid concentration sensor is provided in the slurry barrel 15, and the liquid level sensor or the liquid concentration sensor is electrically connected to the liquid pump 64. The slurry liquid level in the slurry barrel 15 is detected and monitored by the liquid level sensor, or the slurry concentration in the slurry barrel 15 is detected and monitored by the liquid concentration sensor, and the detection result of the liquid level sensor or the detection result of the liquid concentration sensor is fed back to the liquid pump 64, so that the liquid pump 64 can automatically and timely supply liquid to the slurry barrel 15 according to actual conditions, so as to realize automatic liquid replenishment.

[0048] In this embodiment, the floating support mechanism 5 includes a plurality of floating support modules 51 arranged outside the circumference of the rotary bearing 3 with an external gear. The floating support module 51 includes a guide rod 52 mounted on the frame 1, a first spring 53 sleeved on the outside of the guide rod 52, a first ball sleeve 54 sleeved on the outside of the guide rod 52, and a limit plate 55 mounted on the top of the guide rod 52. The intermediate sealing ring 19 is connected to the outer sleeve of the first ball sleeve 54, the first spring 53 is sandwiched between the first ball sleeve 54 and the frame 1, and the first ball sleeve 54 is located between the limit plate 55 and the first spring 53; the floating The support unit 7 includes a guide post 71 connected to the guide rod 52 of one of the floating support modules 51, a second spring 72 sleeved at the connection between the guide post 71 and the guide rod 52, a second ball sleeve 73 sleeved outside the guide post 71, a third spring 74 sleeved outside the guide post 71, and a stopper 75 mounted on the top of the guide post 71. The cover plate 12 is mounted on the outer cover of the second ball sleeve 73. The stopper 75, the adapter portion of the seal pressing drive mechanism 9, the third spring 74, the second ball sleeve 73, the second spring 72, and the corresponding floating support module 51 are arranged in order from top to bottom. This structural design allows the cover plate 12 and the intermediate sealing ring 19 to move downward when pressure is applied and automatically separate when the pressure is released.

[0049] Specifically, the pulp barrel rotation drive mechanism 4 includes a transmission unit 42 and a transmission gear 43. The transmission end of the transmission unit 42 is in transmission connection with the transmission gear 43, which meshes with the outer gear of the outer ring 41 of the slewing bearing. A slewing bearing ball 40 is disposed between the outer ring 41 of the slewing bearing and the inner ring 39 of the slewing bearing. The inner ring 39 of the slewing bearing is mounted on the frame, and the annular sealing flange of the pulp barrel 15 is mounted on the outer ring 41 of the slewing bearing. The transmission unit 42 drives the transmission gear 43 to rotate, which in turn drives the outer ring 41 of the slewing bearing and the pulp barrel 15 with the annular sealing flange to rotate. During the rotation of the pulp barrel 15, the stirring member 13 stirs the slurry in the pulp barrel 15 to make the slurry uniform. In order to reduce transmission noise and improve transmission stability, preferably, the teeth on the external gear of the outer ring 41 of the slewing bearing and the teeth on the transmission gear 43 are all helical teeth; the transmission unit 42 is composed of a motor, a built-in reducer, a pulley, a belt, a bearing seat and a power output transmission shaft. The transmission unit 42 belongs to the existing technology and will not be repeated here.

[0050] Example 2.

[0051] like Figure 5 As shown, the difference between this embodiment and the first embodiment is that the swing drive module 86 includes a rotating gear 867 arranged on the cover plate 12, a fixed seat 868 installed on the floating support mechanism 5, a driving rod 869 slidably connected to the fixed seat 868 and a rack 8691 arranged on the driving rod 869, the rack 8691 is engaged with the rotating gear 867 for transmission, the rotating gear 867 is rotatably arranged on the fixed seat 868, the cover plate 12 is coaxial with the rotating shaft of the floating support unit 7 and the central axis of the rotating gear 867; the rotating gear 867 is sleeved on the outside of the guide rod 52. Pushing and pulling the drive rod 869 causes the drive rod 869 to reciprocate. The reciprocating drive rod 869 drives the rack 8691 to reciprocate. The reciprocating rack 8691 meshes with the rotating gear 867 to transmit the reciprocating rotation of the rotating gear 867. The reciprocating rotating gear 867 drives the cover plate 12 to reciprocate relative to the guide rod 52 of the floating support mechanism 5, thereby achieving the swinging of the cover plate 12. This structural design is suitable for smaller pulp barrels 15. Compared with larger pulp barrels 15, the weight of the cover plate 12 and the protective ring 11 required for smaller pulp barrels 15 is also smaller, and no large thrust is required. The manual drive of the gear rack transmission structure to achieve the swinging of the cover plate 12 and the protective ring 11 does not require a control system such as a hydraulic cylinder and a hydraulic station, thereby reducing equipment costs.

[0052] The remaining structures of this embodiment are the same as those of the first embodiment. The same structures adopt the analysis of the first embodiment and will not be repeated here.

[0053] Compared with the double-layer structure vacuum slurry dipping machines currently on the market, the investment casting vacuum slurry dipping equipment of the present invention has a simple structure, convenient maintenance, easy operation, easy cleaning of slurry dripping, and a long service life of the machine; automatic rehydration maintains the quality, stability and life of the slurry, and can cooperate with a robot to complete automated processing.

[0054] All technical features in this embodiment can be freely combined according to actual needs.

[0055] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. An investment casting vacuum slurry dipping device, characterized by: The invention comprises a frame (1), a pulp barrel (15) with an annular sealing flange, a rotary bearing (3) with an external gear and an inner ring mounted on the frame (1), a pulp barrel bottom support mechanism (10) arranged at the top center of the bottom of the frame (1) and arranged at the bottom of the supporting pulp barrel (15), a pulp barrel rotation drive mechanism (4) arranged on the frame (1), a floating support mechanism (5) mounted on the frame (1) and located outside the circumference of the rotary bearing (3) with an external gear, an intermediate sealing ring (19) mounted on the floating support mechanism (5) and located above the annular sealing flange of the pulp barrel (15), a top support mechanism (10) arranged on the floating support mechanism (5), and a middle sealing ring (19) mounted on the top of the floating support mechanism (5). The invention relates to a floating support unit (7) at the top, a cover plate (12) rotatably arranged on the floating support unit (7), a sealing pressing driving mechanism (9) rotatably connected to the top of the floating support unit (7) and drivingly connected to the cover plate (12), a protective ring (11) rotatably connected to the top of the frame (1) or the floating support mechanism (5), a swing driving mechanism (8) installed on the frame (1) and used for driving the cover plate (12) and the protective ring (11) to swing synchronously, an automatic liquid replenishing mechanism (6) installed on the outside of the frame (1), a stirring member (13) respectively installed on the middle sealing ring (19), a vacuuming mechanism (14) and The hanging mechanism (2) and the annular sealing flange at the top of the pulp barrel (15) are installed on the outer ring (41) of the rotary bearing with an external gear. The vacuum mechanism (14) is connected to the inner cavity of the intermediate sealing ring (19). The hanging end of the hanging mechanism (2) can protrude into the inner cavity of the intermediate sealing ring (19); the cover plate (12) is located on one side of the protective ring (11), and the stirring member (13) is inserted into the pulp barrel (15); when the protective ring (11) is located above the intermediate sealing ring (19), the cover plate (12) is located on the outside of the intermediate sealing ring (19); when the cover plate (12) is located above the intermediate sealing ring (19), the protective ring (11) is located on the outer side of the intermediate sealing ring (19); when the cover plate (12) is located above the intermediate sealing ring (19), the protective ring (11) is located on the outer side of the intermediate sealing ring (19); when the cover plate (12) is located above the intermediate sealing ring (19), the protective ring (11) is located on the outer side of the intermediate sealing ring (19). The ring (11) is located outside the middle sealing ring (19); the sealing downward pressure driving mechanism (9) is used to apply downward pressure to the cover plate (12) to tightly press the cover plate (12), the middle sealing ring (19) and the annular sealing flange of the pulp barrel (15) together; the cover plate (12) and the middle sealing ring (19) and the annular sealing flange of the pulp barrel (15) are sealed and connected via sealing rings (16) respectively; the automatic liquid replenishing mechanism (6) is used to replenish liquid into the pulp barrel (15); the pulp barrel rotation driving mechanism (4) is used to drive the pulp barrel (15) to rotate; and the stirring member (13) is L-shaped.

2. The vacuum slurry dipping equipment for investment casting according to claim 1, characterized in that: The cover plate (12) is provided with a pressure gauge (17) and / or an observation window (18).

3. The vacuum slurry dipping equipment for investment casting according to claim 2, characterized in that: The floating cover plate (12), the floating middle sealing ring (19), the annular sealing flange of the pulp barrel (15) and the two sealing rings (16) therein are pressed together by the sealing pressing driving mechanism (9) to form a sealing body.

4. The vacuum slurry dipping equipment for investment casting according to claim 3, characterized in that: The cover plate (12) is hinged with a linkage rod (81), and one end of the linkage rod (81) away from the cover plate (12) is hinged with the protective ring (11). The quadrilateral hinge structure formed by the cover plate (12), the protective ring (11) and the linkage rod (81) arranged on the floating support mechanism (5) swings under the drive of the swing drive mechanism (8).

5. The vacuum slurry dipping equipment for investment casting according to claim 4, characterized in that: The floating support mechanism (5) includes a plurality of floating support modules (51) arranged outside the peripheral side of the rotary bearing (3) with an external gear, the floating support module (51) including a guide rod (52) mounted on the frame (1), a first spring (53) sleeved outside the guide rod (52), a first ball sleeve (54) sleeved outside the guide rod (52), and a limit plate (55) mounted on the top end of the guide rod (52), an intermediate sealing ring (19) is connected to the outer sleeve of the first ball sleeve (54), the first spring (53) is sandwiched between the first ball sleeve (54) and the frame (1), and the first ball sleeve (54) is located between the limit plate (55) and the first spring (53); the floating support unit (7) comprises a guide post (71) connected to a guide rod (52) of one of the floating support modules (51), a second spring (72) sleeved at the connection between the guide post (71) and the guide rod (52), a second ball sleeve (73) sleeved outside the guide post (71), a third spring (74) sleeved outside the guide post (71) and a stopper (75) mounted on the top end of the guide post (71), a cover plate (12) mounted on the outer sleeve of the second ball sleeve (73), the stopper (75), a connecting portion of the sealing downward pressure driving mechanism (9), the third spring (74), the second ball sleeve (73), the second spring (72) and the corresponding floating support module (51) are arranged in sequence from top to bottom.

6. The vacuum slurry dipping equipment for investment casting according to claim 5, characterized in that: The pulp barrel bottom support mechanism (10) is composed of a pulp barrel support plate (111), an end bearing upper connecting plate (112), an end bearing (113) and an end bearing lower connecting plate (114). The pulp barrel support plate (111), the end bearing upper connecting plate (112), the end bearing (113) and the end bearing lower connecting plate (114) are sequentially arranged from top to bottom between the bottom of the pulp barrel (15) and the center position of the bottom of the frame (1).

7. The vacuum slurry dipping equipment for investment casting according to claim 4, characterized in that: The swing drive mechanism (8) comprises a first connecting plate (82) connected to the cover plate (12), a second connecting plate (83) connected to the protective ring (11), a first hinge shaft (84) arranged on the first connecting plate (82), a second hinge shaft (85) arranged on the second connecting plate (83), and a swing drive module (86) arranged on the frame (1). The driving end of the swing drive module (86) is hinged to the first connecting plate (82) or the second connecting plate (83). The two ends of the linkage rod (81) are respectively equipped with a first hinge sleeve (87) and a second hinge sleeve (88). The first hinge sleeve (87) is movably sleeved outside the first hinge shaft (84), and the second hinge sleeve (88) is movably sleeved outside the second hinge shaft (85). The first connecting plate (82) is rotatably connected to the floating support unit (7), and the second connecting plate (83) is rotatably connected to the top of the floating support mechanism (5).

8. The vacuum slurry dipping equipment for investment casting according to claim 7, characterized in that: The swing drive module (86) includes a rotating gear (867) arranged on the cover plate (12), a fixed seat (868) installed on the floating support mechanism (5), a driving rod (869) slidably connected to the fixed seat (868), and a rack (8691) arranged on the driving rod (869). The rack (8691) is engaged with the rotating gear (867) for transmission. The rotating gear (867) is rotatably arranged on the fixed seat (868). The cover plate (12) is coaxial with the rotating shaft of the floating support unit (7) and the central axis of the rotating gear (867).

9. The vacuum slurry dipping equipment for investment casting according to claim 1, characterized in that: The number of the hanging mechanisms (2) is one or more, and the hanging mechanisms (2) include a conduit (21) installed outside the intermediate sealing ring (19), a hanging rod (22) slidably connected to the inner cavity of the conduit (21), and a mobile driver (23) installed outside the intermediate sealing ring (19), wherein the mobile end of the mobile driver (23) is fixedly connected to one end of the hanging rod (22); the mobile driver (23) is used to drive the hanging rod (22) to retract into the conduit (21) or to drive the hanging rod (22) to insert into the inner cavity of the intermediate sealing ring (19).

10. The vacuum slurry dipping equipment for investment casting according to claim 1, characterized in that: The sealing pressing drive mechanism (9) comprises a rotating arm (91) and a sealing pressing driver (92). One end of the rotating arm (91) is rotatably connected to the floating support unit (7). The sealing pressing driver (92) is mounted on the other end of the rotating arm (91). The pressing end of the sealing pressing driver (92) is connected to the cover plate (12).

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