A rapid prototyping device for a pouring head wax mold

Abstract

The present application belongs to the technical field of wax mold forming, and particularly relates to a rapid forming device for a pouring and sprue wax mold, comprising a machining table, a gantry frame is fixedly connected to the top outer wall of the machining table through screws, a pneumatic cylinder is fixedly connected to the top outer wall of the gantry frame through screws, a top die is fixedly connected to the piston rod of the pneumatic cylinder, and a lifting rod is fixedly connected to the outer wall of one side of the top die through screws. The present application controls the lifting of the top die through the pneumatic cylinder, realizes mechanical linkage, the bottom baffle can limit the downward movement distance of the mounting plate, ensures the rotation accuracy of the bottom die, the swing column can accurately transfer the bottom die to the position directly below the top die after rotating 180 degrees, realizes automatic feeding, when the traction head slides along the semicircular inclined slide, the height difference of the semicircular inclined slide can be converted into upward thrust, the semicircular inclined slide is designed through the height difference, provides a movement track for the traction head, realizes the automatic ejection action of the ejector pin, reduces the difficulty of material taking, does not need additional power, and improves the energy efficiency of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wax mold forming, and particularly relates to a rapid forming device for a pouring riser wax mold. BACKGROUND

[0002] A pouring riser is a structure set in a casting process to avoid defects in a casting, and a pouring riser wax mold is a mold made of a wax material and consistent with the shape of the pouring riser, which is a key link in a precision casting process and is widely used in the fields of aerospace, automobile manufacturing, and mechanical processing. In the precision casting process, a precise pouring riser wax mold needs to be first made, and then the wax mold and a casting wax mold are combined, followed by processes such as coating, dewaxing, and baking, to finally form a cavity for pouring molten metal, and the forming precision and production efficiency of the pouring riser wax mold directly affect the quality and production schedule of the subsequent casting. With the increasing requirements for the precision of castings in the manufacturing industry and the acceleration of production rhythm, higher requirements are also put forward for the performance of the pouring riser wax mold rapid forming device. Not only the forming precision of the wax mold needs to be ensured, but also the automation degree and production efficiency of the device need to be improved to adapt to large-scale and high-precision production requirements.

[0003] In current actual production, when the pouring riser wax mold rapid forming mold is used, there are some problems:

[0004] Firstly, the feeding and discharging links of the mold are relatively poor in correlation and are relatively independent of each other. When feeding, the position of the bottom mold needs to be manually adjusted to ensure that it is precisely aligned with the top mold, and when discharging, the formed wax mold needs to be manually taken out of the bottom mold. The independent operation of these two links not only increases the cost of manual intervention, but also easily affects the precision of the processing of the top mold and the bottom mold due to manual operation errors, resulting in problems such as size deviation and uneven surface of the wax mold, and further affecting the quality of the subsequent casting.

[0005] Secondly, the pouring riser wax mold in the bottom mold is tightly bonded with the inner wall of the bottom mold, and it is extremely difficult to take out. The operator often needs to use tools to slowly pry the wax mold, which not only easily damages the structure of the wax mold, but also prolongs the overall time of feeding and discharging.

[0006] The traditional device lacks an effective linkage mechanism and cannot realize the consecutive operation of the processes such as feeding, molding, wax injection, demolding, and discharging. The waiting time between processes is long, which seriously reduces the overall production efficiency and makes it difficult to meet the needs of modern batch production. SUMMARY

[0007] In view of the deficiencies of the prior art, the present application provides a rapid forming device for a pouring riser wax mold, which overcomes the deficiencies of the prior art, effectively solves the problem that the correlation between feeding and discharging of the mold is poor when the mold is used for rapid forming of the pouring riser wax mold, the feeding and discharging are relatively independent, the precision of processing of the top mold and the bottom mold is easily affected, the pouring riser wax mold in the bottom mold is tightly bonded with the bottom mold, the difficulty of taking the mold is high, the feeding and discharging time is prolonged, and the production efficiency is reduced.

[0008] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0009] A rapid forming device for a pouring riser wax mold, comprising a processing table, a gantry frame is fixedly connected to the top outer wall of the processing table through screws, and a pneumatic cylinder is fixedly connected to the top outer wall of the gantry frame through screws, a piston rod of the pneumatic cylinder is fixedly connected to a top mold, a lifting rod is fixedly connected to one side outer wall of the top mold through screws, a pull plate is fixedly connected to the bottom outer wall of the lifting rod through screws, and a first guide rod is penetratingly arranged on one end outer wall of the pull plate, an installation plate is installed on the top outer wall of the first guide rod, a first spring is fixedly connected between the installation plate and the pull plate, and a bottom baffle is arranged on the bottom of the installation plate;

[0010] A rack is fixedly connected to one side outer wall of the installation plate, a half gear is engaged on the outer wall of the rack, a gear shaft is penetratingly installed at the center of the inner wall of the half gear, a first bevel gear is fixedly connected to one end outer wall of the gear shaft, a second bevel gear is engaged on the outer wall of the first bevel gear, a swing column is fixedly connected to the top outer wall center of the second bevel gear, a mold frame is welded to the top outer wall of the swing column, and a bottom mold is arranged on the inner wall of the mold frame;

[0011] A wax mold ejection assembly is arranged at the bottom of the bottom mold, and a semicircular inclined sliding table is arranged below the wax mold ejection assembly on the top outer wall of the processing table.

[0012] Preferably, the wax mold ejection assembly comprises a second spring, a connecting plate, a traction head, a top rod and a top pin, the second spring is fixedly connected to the bottom outer wall of the bottom mold, the connecting plate is fixedly connected to the bottom outer wall of the second spring, the top rod comprises two, the two top rods are welded to the top outer wall of the connecting plate, the top pin is welded to the top outer wall of the top rod, the top pin is arranged on the bottom inner wall of the bottom mold, and the traction head is tightly attached to the top outer wall of the semicircular inclined sliding table.

[0013] Preferably, when the swing column is rotated by 180°, the pull plate is tightly attached to the top outer wall of the bottom baffle.

[0014] Preferably, a positioning column is arranged around the bottom outer wall of the top mold, a positioning hole is formed around the top outer wall of the bottom mold, and the positioning column and the positioning hole are one-to-one corresponding.

[0015] Preferably, the top mold top outer wall is fixedly connected with a wax injection pipe, and a pipe joint is arranged on the outer wall of one end of the wax injection pipe; the bottom outer wall of the pipe joint is fixedly connected with a wax inlet pipe for connecting a wax injection machine; the bottom outer wall of the top mold is provided with adjacent nozzles, and the nozzles and the wax injection pipe are in communication with each other.

[0016] Preferably, the outer walls on both sides of the top mold are welded with side plates, and the top outer wall of each side plate is fixedly connected with a second guide rod, and the second guide rod is arranged through the top outer wall of the gantry.

[0017] Preferably, the bottom outer wall of the processing table is fixedly connected with a protective box through screws, and a rectangular groove is formed in the outer wall of one side of the protective box; the pull plate is arranged through the inner wall of the rectangular groove; and the rack, the half gear, the first bevel gear and the second bevel gear are arranged in the interior of the protective box.

[0018] Preferably, the outer wall of the other side of the mounting plate is welded with adjacent limiting strips, and the pull plate is arranged between the two limiting strips.

[0019] Preferably, the C-shaped plate is fixedly connected between the processing table and the bottom baffle through screws, a third guide rod is arranged through the top outer wall of the mounting plate and fixedly connected to the bottom outer wall of the processing table, a bearing seat is fixedly connected to the top outer wall of the bottom baffle through screws, and the gear shaft is rotatably connected to the inner wall of the bearing seat.

[0020] Preferably, support legs are welded around the bottom outer wall of the processing table, a support frame is welded between two of the support legs, a PLC controller is fixedly connected to the top outer wall of the support frame through screws, a start-stop button is arranged at the corner of one side of the top outer wall of the processing table, and the PLC controller, the start-stop button, the wax injection machine and the air cylinder are connected through signal lines.

[0021] The present application has the following advantages:

[0022] The rapid forming device for the pouring riser wax mold can control the lifting of the top mold through the air cylinder, and the lifting rod can synchronously transmit the movement of the top mold to the pull plate, realize mechanical linkage, provide stable guidance for the movement of the subsequent rack by cooperation of the pull plate, the first guide rod and the mounting plate, and the first spring can play a buffering and resetting role in the lifting process of the top mold, so as to avoid rigid collision of parts; meanwhile, the bottom baffle can limit the downward movement distance of the mounting plate, thereby controlling the rotation angle of the half gear and ensuring the rotation precision of the bottom mold.

[0023] The rapid molding device for wax molds with gating and riser of the present invention uses a rack and pinion meshing to convert the linear motion of the mounting plate into the rotational motion of the pinion, providing power for the rotation of the bottom mold. Furthermore, the meshing of the first bevel gear and the second bevel gear changes the direction of power transmission, enabling the swing column to drive the mold frame to rotate. A 180° rotation of the swing column can accurately transfer the bottom mold to directly below the top mold, realizing automatic feeding.

[0024] The rapid prototyping device for wax molds with gating and risers of the present invention has a second spring in the wax mold ejection assembly that can drive the connecting plate to reset, preparing for the next ejection of the ejector pin. The connecting plate transmits the elastic force of the second spring and the thrust of the traction head to the ejector rod, achieving uniform force transmission. When the traction head slides along the semi-circular inclined slide, it can convert the height difference of the semi-circular inclined slide into an upward thrust, driving the ejector rod to move. The ejector rod can accurately push the ejector pin, ensuring that the ejector pin stably ejects the wax mold, avoiding the wax mold from sticking to the bottom mold, reducing the difficulty of material removal. The semi-circular inclined slide, through the height difference design, provides a movement trajectory for the traction head, realizing the automatic ejection action of the ejector pin without additional power, thus improving the energy efficiency of the device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the rapid prototyping device for gating and riser wax molds proposed in this invention, showing the initial position of the top mold.

[0026] Figure 2 This is a schematic diagram of the overall structure of the top mold and bottom mold of the rapid prototyping device for gating and riser wax molds proposed in this invention when they are joined together;

[0027] Figure 3 This is a schematic diagram of the overall structure of the rapid prototyping device for gating and riser wax molds proposed in this invention when the wax mold ejects from the top mold;

[0028] Figure 4 This invention is based on Figure 1 Overall structural diagram;

[0029] Figure 5 This invention is based on Figure 4 A schematic diagram of the internal structure of the protective box;

[0030] Figure 6 This invention is based on Figure 2 A schematic diagram of the internal structure of the protective box;

[0031] Figure 7 for Figure 5 Enlarged schematic diagram of part A of the structure;

[0032] Figure 8 for Figure 6 Enlarged schematic diagram of part B structure;

[0033] Figure 9 Based onFigure 7 A schematic diagram of the mounting plate connection structure;

[0034] Figure 10 This is a schematic diagram of the connection structure of the wax mold ejection component of a rapid prototyping device for wax molds with gating and riser proposed in this invention.

[0035] In the diagram: 1. Processing table; 2. Gantry frame; 3. Cylinder; 4. Top mold; 5. Lifting rod; 6. Pull plate; 7. First guide rod; 8. Mounting plate; 9. First spring; 10. Bottom baffle; 11. Rack; 12. Half gear; 13. Gear shaft; 14. First bevel gear; 15. Second bevel gear; 16. Swing column; 17. Mold frame; 18. Bottom mold; 19. Wax mold ejection assembly; 191. Second spring; 192. Connecting plate; 193. Traction head; 194. Push rod; 195. Ejector pin; 20. Semi-circular inclined slide; 21. Positioning post; 22. Wax injection tube; 23. Pipe connector; 24. Wax inlet tube; 25. Nozzle; 26. Side plate; 27. Second guide rod; 28. Protective box; 29. ​​Rectangular groove; 30. Limiting strip; 31. C-shaped plate; 32. Third guide rod; 33. Bearing seat; 34. Support frame; 35. PLC controller; 36. Start / stop button. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] Reference Figures 1-10 Example 1: A rapid molding device for wax molds with gating and risers includes a processing table 1. A gantry frame 2 is fixedly connected to the top outer wall of the processing table 1 by screws. A cylinder 3 is fixedly connected to the top outer wall of the gantry frame 2 by screws. A top mold 4 is fixedly connected to the piston rod of the cylinder 3. A lifting rod 5 is fixedly connected to one side outer wall of the top mold 4 by screws. A pull plate 6 is fixedly connected to the bottom outer wall of the lifting rod 5 by screws. A first guide rod 7 is provided through one end of the outer wall of the pull plate 6. An mounting plate 8 is installed on the top outer wall of the first guide rod 7. A first spring 9 is fixedly connected between the mounting plate 8 and the pull plate 6. A bottom baffle 10 is provided at the bottom of the mounting plate 8.

[0038] Through the above scheme, the processing table 1, as the basic support component of the device, ensures the stability of the entire device during operation, avoiding the impact of vibration on the molding accuracy of the wax mold at the gating gate. The gantry frame 2 is fixed to the processing table 1 with screws, and its high structural strength allows for the secure installation of the cylinder 3, preventing displacement of the cylinder 3 during operation. The cylinder 3, as the core power component, has its piston rod fixed to the top mold 4, enabling precise control according to the instructions of the PLC controller 35, providing stable power for the mold closing and opening processes. The lifting rod 5 connects the top mold 4 and the pull plate 6, synchronously transmitting the lifting motion of the top mold 4 to the pull plate 6, realizing the linkage between the top mold 4 and subsequent transmission components, and reducing movement. The first guide rod 7 passes through the pull plate 6 and connects to the mounting plate 8, which can limit the movement direction of the pull plate 6 and ensure that the pull plate 6 drives the mounting plate 8 to move in a straight line, thus preventing the mounting plate 8 from deviating. The first spring 9 connects the mounting plate 8 and the pull plate 6. When the top mold 4 descends, it can generate tension through stretching to drive the mounting plate 8 to move down. When the top mold 4 rises, it can pull the mounting plate 8 back to its original position by contraction. At the same time, it buffers the impact force between the components and extends the service life of the components. The bottom baffle 10 is set below the mounting plate 8. When the mounting plate 8 moves down to contact the bottom baffle 10, it can prevent the mounting plate 8 from moving down further, thereby controlling the movement distance of the rack 11 and ensuring the accurate rotation angle of the subsequent half gear 12.

[0039] In this embodiment, the cylinder 3 controls the lifting and lowering of the top mold 4, and the lifting rod 5 can synchronously transmit the movement of the top mold 4 to the pull plate 6 to achieve mechanical linkage. The pull plate 6, the first guide rod 7 and the mounting plate 8 cooperate to provide stable guidance for the subsequent movement of the rack 11. The first spring 9 can play a buffering and resetting role during the lifting and lowering of the top mold 4 to avoid rigid collision of components. At the same time, the bottom baffle 10 can limit the downward movement distance of the mounting plate 8, thereby controlling the rotation angle of the half gear 12 and ensuring the rotation accuracy of the bottom mold 18.

[0040] In embodiment 2, a rack 11 is fixedly connected to one side of the outer wall of the mounting plate 8, and a half gear 12 meshes on the outer wall of the rack 11. A gear shaft 13 is installed through the center of the inner wall of the half gear 12, and a first bevel gear 14 is fixedly connected to the outer wall of one end of the gear shaft 13. A second bevel gear 15 meshes on the outer wall of the first bevel gear 14, and a swing column 16 is fixedly connected to the center of the top outer wall of the second bevel gear 15. A mold frame 17 is welded to the top outer wall of the swing column 16, and a bottom mold 18 is provided on the inner wall of the mold frame 17. When the swing column 16 rotates 180°, the pull plate 6 is tightly attached to the top outer wall of the bottom baffle 10.

[0041] With the above scheme, the rack 11 is fixed to one side of the mounting plate 8 and moves with the linear movement of the mounting plate 8. It meshes with the half gear 12, converting the linear motion into the rotational motion of the half gear 12, providing a power source for the rotation of the bottom mold 18. The half gear 12 is mounted via the gear shaft 13, and its tooth design ensures that it rotates exactly 180° under the drive of the rack 11, thereby controlling the precise rotation of the bottom mold 18. The gear shaft 13 passes through the half gear 12 and the first bevel gear 14, synchronously transmitting the rotation of the half gear 12 to the first bevel gear 14, ensuring the continuity of power transmission. The first bevel gear 14 meshes perpendicularly with the second bevel gear 15, changing the direction of power transmission. The vertical rotation is converted into a horizontal rotation, which drives the swing column 16 to rotate horizontally. The top of the swing column 16 is welded to the mold frame 17, which can drive the mold frame 17 and the bottom mold 18 to rotate 180° synchronously. This enables the bottom mold 18 to switch precisely between the material loading position and the mold closing position. The inner wall of the mold frame 17 is adapted to the bottom mold 18, which can firmly fix the bottom mold 18 and prevent the bottom mold 18 from shaking during rotation and mold closing, thus ensuring the molding accuracy of the wax mold of the gating gate. When the swing column 16 rotates 180°, the pull plate 6 is close to the bottom baffle 10. This design can ensure that the half gear 12 stops rotating through mechanical limit, avoiding excessive rotation of the bottom mold 18 and further improving the accuracy of the device operation.

[0042] In this embodiment, the meshing of the rack 11 and the half gear 12 can convert the linear motion of the mounting plate 8 into the rotational motion of the half gear 12, providing power for the rotation of the bottom mold 18. Furthermore, the meshing of the first bevel gear 14 and the second bevel gear 15 changes the direction of power transmission, enabling the swing column 16 to drive the mold frame 17 to rotate. The 180° rotation of the swing column 16 can accurately transfer the bottom mold 18 to the bottom directly below the top mold 4, thus realizing automatic feeding.

[0043] In embodiment 3, a wax mold ejection assembly 19 is provided at the bottom of the bottom mold 18, and a semi-circular inclined slide 20 is provided on the top outer wall of the processing table 1 below the wax mold ejection assembly 19. The wax mold ejection assembly 19 includes a second spring 191, a connecting plate 192, a traction head 193, an ejector rod 194, and an ejector pin 195. The second spring 191 is fixedly connected to the bottom outer wall of the bottom mold 18, the connecting plate 192 is fixedly connected to the bottom outer wall of the second spring 191, there are two ejector rods 194, and both ejector rods 194 are welded to the top outer wall of the connecting plate 192. The ejector pin 195 is welded to the top outer wall of the ejector rod 194. The ejector pin 195 is provided on the bottom inner wall of the bottom mold 18, and the traction head 193 is in close contact with the top outer wall of the semi-circular inclined slide 20.

[0044] Through the above scheme, the wax model ejection assembly 19 is installed at the bottom of the bottom mold 18 and is the core structure for realizing automatic demolding of the wax model from the gating system. This avoids the tediousness and damage of manual material removal. The second spring 191 connects the bottom mold 18 and the connecting plate 192. When the traction head 193 slides along the semi-circular inclined slide 20 to the low position, it can retract and pull the connecting plate 192 back to its original position, driving the ejector pin 195 to retract into the bottom mold 18, preparing for the next wax injection. The connecting plate 192, as an intermediate connecting part, can evenly transmit the elastic force of the second spring 191 and the thrust of the traction head 193 to the two ejector rods 194, ensuring that the ejector rods 194 move synchronously. The two ejector rods 194 are symmetrically arranged, which can stably push... The ejector pin 195 is movable to prevent it from tilting during ejection and to avoid damage to the sprue wax mold. The ejector pin 195 is located on the inner wall of the bottom of the bottom mold 18, and its top is in contact with the sprue wax mold. Under the push of the ejector rod 194, it can lift the sprue wax mold upward, so that the sprue wax mold is separated from the inner wall of the bottom mold 18, which greatly reduces the difficulty of material removal. The semi-circular inclined slide 20 has a height difference, which is lower on the side closer to the top mold 4 and higher on the side farther away from the top mold 4. When the bottom mold 18 is reset and moved, the traction head 193 slides along its surface and the height gradually increases, thereby generating an upward thrust to drive the ejector rod 194 and the ejector pin 195 to move. No additional power source is required, realizing the automation and energy saving of the demolding action.

[0045] In this embodiment, the second spring 191 in the wax mold ejection assembly 19 can drive the connecting plate 192 to reset, preparing for the next ejection of the ejector pin 195. The connecting plate 192 transmits the elastic force of the second spring 191 and the thrust of the traction head 193 to the ejector rod 194, achieving uniform force transmission. When the traction head 193 slides along the semi-circular inclined slide 20, it can convert the height difference of the semi-circular inclined slide 20 into an upward thrust, driving the ejector rod 194 to move. The ejector rod 194 can accurately push the ejector pin 195, ensuring that the ejector pin 195 stably ejects the wax mold, avoiding the wax mold at the sprue and riser sticking to the bottom mold 18, reducing the difficulty of material removal. The semi-circular inclined slide 20, through the height difference design, provides a movement trajectory for the traction head 193, realizing the automatic ejection action of the ejector pin 195 without additional power, thus improving the energy efficiency of the device.

[0046] The top mold 4 has positioning posts 21 on all four sides of its bottom outer wall, and the bottom mold 18 has positioning holes on all four sides of its top outer wall. The positioning posts 21 and the positioning holes correspond one-to-one.

[0047] With the above scheme, the positioning pins 21 correspond one-to-one with the positioning holes of the bottom mold 18. When the top mold 4 is lowered and closed, the positioning pins 21 will first be inserted into the positioning holes to accurately calibrate the positions of the top mold 4 and the bottom mold 18, avoiding problems such as flash and dimensional deviations in the wax model due to misalignment during mold closing, and improving the molding quality of the wax model with the gating gate; at the same time, the positioning pins 21 can also provide guidance for the top mold 4 during the mold closing process, ensuring that the top mold 4 is pressed smoothly onto the bottom mold 18, reducing mold collision damage.

[0048] The top outer wall of the top mold 4 is fixedly connected to a wax injection tube 22, and a pipe joint 23 is installed on the outer wall of one end of the wax injection tube 22. The bottom outer wall of the pipe joint 23 is fixedly connected to a wax inlet tube 24 for connecting to a wax injection machine. The bottom outer wall of the top mold 4 is provided with adjacent nozzles 25, and the nozzles 25 and the wax injection tube 22 are interconnected.

[0049] With the above scheme, the wax injection tube 22 is fixed to the top mold 4, serving as the channel for the wax liquid to enter the top mold 4; the pipe joint 23 connects the wax injection tube 22 and the wax inlet tube 24, facilitating the installation and disassembly of the wax inlet tube 24, while ensuring the sealing of the wax liquid transportation and preventing wax liquid leakage; the wax inlet tube 24 connects the wax injection machine and the pipe joint 23, which can stably transport the wax liquid in the wax injection machine to the wax injection tube 22; the nozzles 25 are evenly distributed at the bottom of the top mold 4 and are connected to the wax injection tube 22, which can evenly spray the wax liquid into the cavity of the bottom mold 18, avoiding uneven distribution of the wax liquid in the bottom mold 18, which would cause defects such as air bubbles and material shortages in the gating wax mold, and ensuring the integrity and density of the gating wax mold forming.

[0050] The top mold 4 has side plates 26 welded to both outer walls, and a second guide rod 27 is fixedly connected to the top outer wall of the side plate 26. The second guide rod 27 is installed through the top outer wall of the gantry frame 2.

[0051] With the above solution, the second guide rod 27 is fixed on the side plate 26 and passes through the gantry 2, which can provide double guidance for the lifting and lowering movement of the top mold 4, prevent the top mold 4 from shifting left or right or swaying during the movement, and ensure that the top mold 4 always moves in the vertical direction.

[0052] The bottom outer wall of the processing table 1 is fixedly connected to a protective box 28 by screws, and a rectangular groove 29 is opened on one side of the outer wall of the protective box 28. The pull plate 6 is installed through the inner wall of the rectangular groove 29. The rack 11, half gear 12, first bevel gear 14 and second bevel gear 15 are all located inside the protective box 28.

[0053] With the above solution, the protective box 28 is fixed at the bottom of the processing table 1, which can isolate the core transmission components such as the rack 11 and half gear 12 from the outside world, effectively preventing dust, metal shavings, wax residue and other impurities from entering the protective box 28, and avoiding the failure of components due to impurities jamming or wear; the rectangular groove 29 is adapted to the pull plate 6, which not only provides sufficient space for the pull plate 6 to move up and down, but also restricts the lateral displacement of the pull plate 6 through the edge of the groove, ensuring the stable movement of the pull plate 6.

[0054] The mounting plate 8 has adjacent limiting strips 30 welded to its outer wall on the other side, and the pull plate 6 is disposed between the two limiting strips 30.

[0055] With the above scheme, two limiting strips 30 are symmetrically welded to one side of the mounting plate 8 to form a lateral limiting space for the pull plate 6. This can limit the pull plate 6 from shifting left and right during its up and down movement, ensuring that the pull plate 6 always maintains a precise relative position with the first guide rod 7 and the mounting plate 8. This avoids misalignment of the rack 11 and the half gear 12 due to the pull plate 6 shifting, ensuring the stable operation of the transmission mechanism and reducing the probability of mechanical failure.

[0056] A C-shaped plate 31 is fixedly connected between the processing table 1 and the bottom baffle 10 by screws, and a third guide rod 32 is provided through the top outer wall of the mounting plate 8. The third guide rod 32 is fixedly connected to the bottom outer wall of the processing table 1. A bearing seat 33 is fixedly connected to the top outer wall of the bottom baffle 10 by screws, and the gear shaft 13 is rotatably connected to the inner wall of the bearing seat 33.

[0057] Through the above scheme, the C-shaped plate 31 connects the processing table 1 and the bottom baffle 10, which can enhance the connection strength between the two, keep the bottom baffle 10 in a stable supporting state, and prevent the bottom baffle 10 from displacing or deforming when subjected to the pressure of the mounting plate 8; the third guide rod 32 is fixed at the bottom of the processing table 1 and passes through the mounting plate 8, forming a double guide with the first guide rod 7, further restricting the movement direction of the mounting plate 8, ensuring that the mounting plate 8 moves smoothly in the vertical direction, and improving the accuracy of the rack 11 movement; the bearing seat 33 is fixed on the bottom baffle 10, providing stable rotational support for the gear shaft 13, reducing the frictional resistance of the gear shaft 13 during rotation, and ensuring the coaxiality of the gear shaft 13, half gear 12, and first bevel gear 14, ensuring transmission efficiency and accuracy.

[0058] Support legs are welded around the bottom outer wall of the processing table 1, and a support frame 34 is welded between two of the support legs. A PLC controller 35 is fixedly connected to the top outer wall of the support frame 34 by screws. A start / stop button 36 is provided at one corner of the top outer wall of the processing table 1. The PLC controller 35 is connected to the start / stop button 36, the wax injection machine and the cylinder 3 by signal lines.

[0059] With the above solution, the support legs are welded to the bottom of the processing table 1, and the support frame 34 connects the two support legs, providing a solid mounting platform for the PLC controller 35 and preventing the PLC controller 35 from shifting due to vibration. The PLC controller 35 is connected to the start / stop button 36, the wax injection machine and the cylinder 3 through signal lines. It can preset and execute the complete process of wax mold forming (such as the lifting of the top mold 4, the rotation of the bottom mold 18, the wax injection time, etc.), realize the automated control of the device and reduce manual operation steps.

[0060] Working principle: Before operation, the wax inlet pipe 24 needs to be connected to the external wax injection machine via pipe connector 23, and parameters such as the lifting stroke of cylinder 3 and the wax injection time of the wax injection machine are preset via PLC controller 35. When starting the device, the operator presses the start / stop button 36, and PLC controller 35 issues a command to control the piston rod of cylinder 3 to extend downward, pushing the top mold 4 to move downward synchronously;

[0061] When the top mold 4 moves down, the lifting rod 5 on one side will drive the pull plate 6 to move down synchronously along the rectangular groove 29. Since the pull plate 6 is connected to the mounting plate 8 by the first spring 9, and the pull plate 6 is restricted from lateral displacement by the limiting strip 30, the pull plate 6 will pull the mounting plate 8 down along the third guide rod 32 and the first guide rod 7 through the first spring 9 during the downward movement. At this time, the rack 11 on one side of the mounting plate 8 moves down with the mounting plate 8, and the half gear 12 meshing with the rack 11 starts to rotate. The half gear 12 drives the first bevel gear 14 to rotate synchronously through the gear shaft 13. The first bevel gear 14 then drives the meshing second bevel gear 15 to rotate, and finally the swing column 16 at the top of the second bevel gear 15 drives the mold frame 17 and the bottom mold 18 to rotate. When the half gear 12 rotates 180°, the mounting plate 8 just touches the top of the bottom baffle 10. The bottom baffle 10 restricts the mounting plate 8 from moving down further, the half gear 12 stops rotating, and the bottom mold 18 is accurately transferred to the bottom of the top mold 4, completing the automatic feeding.

[0062] Subsequently, cylinder 3 continues to push the top mold 4 downward, and the first spring 9 is further stretched. The positioning pin 21 at the bottom of the top mold 4 is first inserted into the positioning hole of the bottom mold 18 to achieve precise alignment between the top mold 4 and the bottom mold 18 until the top mold 4 and the bottom mold 18 are completely closed. At this time, PLC controller 35 controls the wax injection machine to start. The wax liquid enters the wax injection pipe 22 through the wax inlet pipe 24 and pipe joint 23, and then is evenly injected into the cavity of the bottom mold 18 through the nozzle 25 at the bottom of the top mold 4. After the wax injection time reaches the preset value, the wax injection machine stops working, and the wax liquid is shaped into a sprue wax mold in the bottom mold 18.

[0063] After the wax mold of the gating system is formed, the PLC controller 35 controls the piston rod of the cylinder 3 to retract upward, pulling the top mold 4 to move upward. The top mold 4 and the bottom mold 18 gradually separate. When the positioning pin 21 is completely pulled out of the positioning hole of the bottom mold 18, the first spring 9 begins to retract, pulling the mounting plate 8 to reset upward. The rack 11 moves upward with the mounting plate 8, driving the half gear 12 to rotate 180° in the opposite direction, controlling the swing pin 16 to drive the bottom mold 18 to reset in the opposite direction. During the reset process, the traction head 193 of the bottom wax mold ejection assembly 19 slides along the top outer wall of the semi-circular inclined slide 20 (the semi-circular inclined slide 20 is higher on the side away from the top mold 4). The traction head 193 gradually lifts up as the bottom mold 18 moves, pushing the connecting plate 192 to compress the second spring 191. The connecting plate 192 drives the two ejector rods 194 to move upward synchronously. The ejector rods 194 push the ejector pins 195 to lift the sprue wax mold inside the bottom mold 18, so that the sprue wax mold separates from the inner wall of the bottom mold 18, thus achieving automatic demolding.

[0064] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rapid prototyping device for riser and gating wax molds, comprising a processing table (1), characterized in that, The top outer wall of the processing table (1) is fixedly connected to a gantry frame (2) by screws, and the top outer wall of the gantry frame (2) is fixedly connected to a cylinder (3) by screws. The piston rod of the cylinder (3) is fixedly connected to a top mold (4), and the outer wall of one side of the top mold (4) is fixedly connected to a lifting rod (5) by screws. The bottom outer wall of the lifting rod (5) is fixedly connected to a pull plate (6) by screws, and a first guide rod (7) is provided through one end of the outer wall of the pull plate (6). An installation plate (8) is installed on the top outer wall of the first guide rod (7), and a first spring (9) is fixedly connected between the installation plate (8) and the pull plate (6). A bottom baffle (10) is provided at the bottom of the installation plate (8). A rack (11) is fixedly connected to one side of the outer wall of the mounting plate (8), and a half gear (12) meshes on the outer wall of the rack (11). A gear shaft (13) is installed through the center of the inner wall of the half gear (12), and a first bevel gear (14) is fixedly connected to the outer wall of one end of the gear shaft (13). A second bevel gear (15) meshes on the outer wall of the first bevel gear (14), and a swing column (16) is fixedly connected to the center of the top outer wall of the second bevel gear (15). A mold frame (17) is welded to the top outer wall of the swing column (16), and a bottom mold (18) is provided on the inner wall of the mold frame (17). The bottom mold (18) is provided with a wax mold ejection assembly (19) at the bottom, and a semi-circular inclined slide (20) is provided on the top outer wall of the processing table (1) below the wax mold ejection assembly (19). The wax mold ejection assembly (19) includes a second spring (191), a connecting plate (192), a traction head (193), an ejector rod (194), and an ejector pin (195). The second spring (191) is fixedly connected to the bottom outer wall of the bottom mold (18), the connecting plate (192) is fixedly connected to the bottom outer wall of the second spring (191), there are two ejector rods (194), and both ejector rods (194) are welded to the top outer wall of the connecting plate (192). The ejector pin (195) is welded to the top outer wall of the ejector rod (194). The ejector pin (195) is located on the bottom inner wall of the bottom mold (18), and the traction head (193) is in close contact with the top outer wall of the semi-circular inclined slide (20). When the swing column (16) rotates 180°, the pull plate (6) is pressed against the top outer wall of the bottom baffle (10).

2. The rapid prototyping device for gating and riser wax molds according to claim 1, characterized in that, The top mold (4) has positioning posts (21) on all four sides of its bottom outer wall, and the bottom mold (18) has positioning holes on all four sides of its top outer wall. The positioning posts (21) and the positioning holes correspond one-to-one.

3. The rapid molding device for wax molds with gating and riser according to claim 2, characterized in that, The top outer wall of the top mold (4) is fixedly connected to a wax injection tube (22), and a pipe joint (23) is installed on the outer wall of one end of the wax injection tube (22). The bottom outer wall of the pipe joint (23) is fixedly connected to a wax inlet tube (24) for connecting to a wax injection machine. The bottom outer wall of the top mold (4) is provided with adjacent nozzles (25), and the nozzles (25) and the wax injection tube (22) are interconnected.

4. The rapid prototyping device for gating and riser wax molds according to claim 3, characterized in that, The top mold (4) has side plates (26) welded to both outer walls, and a second guide rod (27) is fixedly connected to the top outer wall of the side plate (26). The second guide rod (27) is installed through the top outer wall of the gantry frame (2).

5. The rapid molding device for gating and riser wax molds according to claim 4, characterized in that, The bottom outer wall of the processing table (1) is fixedly connected to a protective box (28) by screws, and a rectangular groove (29) is opened on one side of the outer wall of the protective box (28). The pull plate (6) is installed through the inner wall of the rectangular groove (29). The rack (11), half gear (12), first bevel gear (14) and second bevel gear (15) are all located inside the protective box (28).

6. The rapid prototyping device for gating and riser wax molds according to claim 5, characterized in that, The mounting plate (8) has adjacent limiting strips (30) welded to the outer wall of the other side, and the pull plate (6) is located between the two limiting strips (30).

7. The rapid molding device for gating and riser wax molds according to claim 6, characterized in that, A C-shaped plate (31) is fixedly connected between the processing table (1) and the bottom baffle (10) by screws, and a third guide rod (32) is provided through the top outer wall of the mounting plate (8). The third guide rod (32) is fixedly connected to the bottom outer wall of the processing table (1). A bearing seat (33) is fixedly connected to the top outer wall of the bottom baffle (10) by screws, and the gear shaft (13) is rotatably connected to the inner wall of the bearing seat (33).

8. The rapid molding device for wax molds with gating and riser according to claim 7, characterized in that, The processing table (1) has support legs welded around its bottom outer wall, and a support frame (34) is welded between two of the support legs. A PLC controller (35) is fixedly connected to the top outer wall of the support frame (34) by screws. A start / stop button (36) is provided at one corner of the top outer wall of the processing table (1). The PLC controller (35) is connected to the start / stop button (36), the wax injection machine and the cylinder (3) by signal lines.

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