Rapid molding device for casting head wax mould

Abstract

The invention belongs to the technical field of wax mold forming, and particularly relates to a casting head wax mold rapid forming device which comprises a machining table, a portal frame is fixedly connected to the outer wall of the top of the machining table through screws, an air cylinder is fixedly connected to the outer wall of the top of the portal frame through screws, and a piston rod of the air cylinder is fixedly connected with a top mold. And the outer wall of one side of the top mold is fixedly connected with a lifting rod through a screw. The top die is controlled to ascend and descend through the air cylinder, mechanical linkage is achieved, meanwhile, the bottom baffle can limit the downward moving distance of the mounting plate, the rotating precision of the bottom die is guaranteed, the bottom die can be accurately transferred to the position under the top die by rotating the swing column by 180 degrees, and automatic feeding is achieved; the height difference of the semicircular inclined sliding table can be converted into upward thrust, the semicircular inclined sliding table is used for providing a movement track for the traction head through the height difference design, the automatic ejection action of the ejector pin is achieved, the material taking difficulty is reduced, extra power is not needed, and the energy efficiency of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wax mold forming, in particular to a rapid forming device for a pouring and riser wax mold. Background Art

[0002] A riser is a structure used in the casting process to prevent defects in castings. A wax mold for a riser is a mold made of wax material that matches the shape of the riser. It is a key step in the precision casting process and is widely used in aerospace, automotive manufacturing, machining, and other fields. During the precision casting process, a precise wax mold for the riser must be created. This wax mold is then combined with the casting wax mold. Subsequently, the mold is coated, dewaxed, and fired to form a cavity into which molten metal can be poured. The molding accuracy and production efficiency of the wax mold for the riser directly impact the quality and production schedule of subsequent castings. With the manufacturing industry's increasing requirements for casting precision and the accelerated pace of production, higher requirements are being placed on the performance of rapid prototyping equipment for riser wax molds. Not only must the molding accuracy of the wax mold be guaranteed, but the automation and production efficiency of the equipment must also be improved to accommodate large-scale, high-precision production needs.

[0003] In current actual production, there are some problems when using wax molds for rapid prototyping of molds: First, the loading and unloading processes of the mold are poorly correlated and relatively independent of each other. During loading, the bottom mold must be manually adjusted to ensure its precise alignment with the top mold. During unloading, the wax mold must be manually removed from the bottom mold. These two independent operations not only increase manual intervention costs, but are also prone to manual errors affecting the machining accuracy of the top and bottom molds, leading to dimensional deviations and surface unevenness in the wax molds, which in turn affects the quality of subsequent castings. Secondly, the wax mold of the pouring and riser inside the bottom mold is tightly adhered to the inner wall of the bottom mold, making it extremely difficult to remove the material. Operators often need to use tools to slowly pry the wax mold, which not only easily damages the wax mold structure, but also prolongs the overall time of loading and unloading.

[0004] Traditional equipment lacks an effective linkage mechanism and cannot achieve the continuous operation of processes such as loading, mold closing, wax injection, demolding, and unloading. The waiting time between each process is long, which seriously reduces the overall production efficiency and makes it difficult to meet the needs of modern mass production. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a rapid prototyping device for a pouring and riser wax mold, which overcomes the shortcomings of the existing technology and effectively solves the problem that when using a mold for rapid prototyping with a pouring and riser wax mold, the correlation between loading and unloading of the mold is poor, and they are relatively independent of each other, which easily affects the processing accuracy of the top mold and the bottom mold, and the pouring and riser wax mold in the bottom mold is tightly adhered to the bottom mold, making it difficult to remove the material, extending the time for loading and unloading, and reducing production efficiency.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A rapid prototyping device for a pouring and riser wax mold comprises a processing table, wherein the top outer wall of the processing table is fixedly connected to a gantry by screws, and the top outer wall of the gantry is fixedly connected to a cylinder by screws, the piston rod of the cylinder is fixedly connected to a top mold, and the outer wall of one side of the top mold is fixedly connected to a lifting rod by screws, the bottom outer wall of the lifting rod is fixedly connected to a pull plate by screws, and a first guide rod is provided through the outer wall of one end of the pull plate, a mounting plate is installed on the top outer wall of the first guide rod, and a first spring is fixedly connected between the mounting plate and the pull plate, and a bottom baffle is provided at the bottom of the mounting plate; A rack is fixedly connected to the outer wall of one side of the mounting plate, and a half gear is meshed on the outer wall of the rack, a gear shaft is installed through the center of the inner wall of the half gear, and a first bevel gear is fixedly connected to the outer wall of one end of the gear shaft, a second bevel gear is meshed on the outer wall of the first bevel gear, and a swing column is fixedly connected to the center of the outer wall of the top of the second bevel gear, a mold frame is welded to the outer wall of the top of the swing column, and a bottom mold is provided on the inner wall of the mold frame; A wax mold ejection assembly is provided at the bottom of the bottom mold, and a semicircular inclined slide is provided on the outer wall of the top of the processing table below the wax mold ejection assembly.

[0007] Preferably, the wax mold ejection assembly includes a second spring, a connecting plate, a traction head, a push rod and an ejector pin, wherein 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, there are two push rods, and both push rods are welded to the top outer wall of the connecting plate, and the ejector pin is welded to the top outer wall of the push rod, wherein the ejector 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 slide.

[0008] Preferably, when the swing column rotates 180°, the pull plate is in close contact with the top outer wall of the bottom baffle.

[0009] Preferably, positioning columns are provided on all four sides of the bottom outer wall of the top mold, and positioning holes are opened on all four sides of the top outer wall of the bottom mold, and the positioning columns and the positioning holes correspond to each other one by one.

[0010] Preferably, a wax injection tube is fixedly connected to the top outer wall of the top mold, and a pipe joint is installed on the outer wall of one end of the wax injection tube. A wax inlet pipe for connecting to a wax injection machine is fixedly connected to the bottom outer wall of the pipe joint. Adjacent nozzles are provided on the bottom outer wall of the top mold, and the nozzles and the wax injection tube are connected to each other.

[0011] Preferably, side panels are welded to the outer walls on both sides of the top mold, and the top outer walls of the side panels are fixedly connected to second guide rods, which are arranged through the top outer wall of the gantry.

[0012] Preferably, the outer wall of the bottom of the processing table is fixedly connected to a protective box by screws, and a rectangular groove is opened on the outer wall of one side of the protective box. The pull plate is arranged on the inner wall of the rectangular groove, and the rack, half gear, first bevel gear and second bevel gear are all located inside the protective box.

[0013] Preferably, adjacent limiting strips are welded to the outer wall on the other side of the mounting plate, and the pull plate is arranged between the two limiting strips.

[0014] Preferably, a C-shaped plate is fixedly connected between the processing table and the bottom baffle by screws, and a third guide rod is provided through the top outer wall of the mounting plate, the third guide rod is fixedly connected to the bottom outer wall of the processing table, the top outer wall of the bottom baffle is fixedly connected to the bearing seat by screws, and the gear shaft is rotatably connected to the inner wall of the bearing seat.

[0015] Preferably, support legs are welded around the outer wall of the bottom of the processing table, and a support frame is welded between two of the support legs. The top outer wall of the support frame is fixedly connected to a PLC controller by screws, and a start-stop button is provided at one corner of the top outer wall of the processing table. The PLC controller is connected to the start-stop button, the wax injection machine and the cylinder through signal lines.

[0016] The beneficial effects of the present invention are: The rapid prototyping device for a pouring and riser wax mold of the present invention controls the lifting of the top mold by a cylinder, and the lifting rod can synchronously transmit the movement of the top mold to the pull plate to achieve mechanical linkage. The pull plate, the first guide rod and the mounting plate cooperate to provide a stable guide for the subsequent movement of the rack. The first spring can play a buffering and resetting role during the lifting and lowering of the top mold to avoid rigid collision of components. At the same time, 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 accuracy of the bottom mold. In the rapid prototyping device for wax molds of the present invention, the meshing of the rack and the half gear can convert the linear motion of the mounting plate into the rotational motion of the half gear, providing power for the rotation of the bottom mold. In addition, the meshing of the first bevel gear and the second bevel gear changes the direction of power transmission, allowing the swing column to drive the mold frame to rotate. The swing column rotates 180 degrees to accurately transfer the bottom mold to the bottom of the top mold, realizing automatic loading. The rapid prototyping device for the wax mold of the pouring and riser 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 pin, thereby realizing uniform force transmission. When the traction head slides along the semicircular inclined slide, the height difference of the semicircular inclined slide can be converted into an upward thrust to drive the ejector pin to move. The ejector pin can accurately push the ejector pin to ensure that the ejector pin stably ejects the wax mold, avoids adhesion of the pouring and riser wax mold to the bottom mold, reduces the difficulty of material removal, and utilizes the height difference design of the semicircular inclined slide to provide a motion trajectory for the traction head, thereby realizing automatic ejection of the ejector pin without the need for additional power, thereby improving the energy efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a pouring and riser wax mold rapid prototyping device proposed by the present invention when the top mold is placed in the initial position; Figure 2 This is a schematic diagram of the overall structure of a pouring and riser wax mold rapid prototyping device proposed by the present invention when the top mold and the bottom mold are combined; Figure 3 This is a schematic diagram of the overall structure of a rapid prototyping device for a wax mold for a casting and riser when the wax mold is ejected from the top mold; Figure 4 The present invention is based on Figure 1 Schematic diagram of the overall structure; Figure 5 The present invention is based on Figure 4 Schematic diagram of the internal structure of the protective box; Figure 6 The present invention is based on Figure 2 Schematic diagram of the internal structure of the protective box; Figure 7 for Figure 5 A schematic diagram of the enlarged structure of part A; Figure 8 for Figure 6 A schematic diagram of the enlarged structure of part B; Figure 9 Based on Figure 7 Schematic diagram of the mounting plate connection structure; Figure 10 This is a schematic diagram of the connection structure of the wax mold ejection component of the pouring and riser wax mold rapid prototyping device proposed by the present invention.

[0018] In the figure: 1. Processing table; 2. Gantry; 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 ejector assembly; 191. Second spring; 192. Connecting plate. 193. Traction head; 194. Ejector rod; 195. Ejector pin; 20. Semicircular inclined slide; 21. Positioning column; 22. Wax injection tube; 23. Pipe joint; 24. Wax inlet tube; 25. Nozzle; 26. Side plate; 27. Second guide rod; 28. Protective box; 29. ​​Rectangular groove; 30. Limit strip; 31. C-type plate; 32. Third guide rod; 33. Bearing seat; 34. Support frame; 35. PLC controller; 36. Start / stop button. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figures 1-10 , Example 1, a rapid prototyping device for a pouring and riser wax mold, comprising a processing table 1, the top outer wall of the processing table 1 is fixedly connected to a gantry 2 by screws, and the top outer wall of the gantry 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 on 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 the outer wall of one end of the pull plate 6, a mounting 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 mounting plate 8 and the pull plate 6, and a bottom baffle 10 is provided at the bottom of the mounting plate 8.

[0021] Through the above scheme, the processing table 1 serves as the basic supporting component of the device, which can ensure that the entire device remains stable during operation and avoids the influence of vibration on the molding accuracy of the wax mold of the pouring and riser. The gantry 2 is fixed to the processing table 1 by screws. Its structural strength is high and the cylinder 3 can be firmly installed to prevent the cylinder 3 from being displaced during operation. The cylinder 3 serves as the core power component. The piston rod of the cylinder 3 is fixed to the top mold 4 and can achieve precise control according to the instructions of the PLC controller 35 to provide stable power for the mold closing and parting processes. The lifting rod 5 connects the top mold 4 and the pull plate 6, and can synchronously transmit the lifting movement of the top mold 4 to the pull plate 6, so as to realize the linkage between the top mold 4 and the subsequent transmission components and reduce the movement. Delay, the first guide rod 7 passes through the pull plate 6 and is connected to the mounting plate 8, which can limit the movement direction of the pull plate 6, ensure that the pull plate 6 drives the mounting plate 8 to move in a straight line, and avoid the mounting plate 8 from offset. The first spring 9 connects the mounting plate 8 and the pull plate 6. When the top mold 4 descends, it can generate tension by stretching to drive the mounting plate 8 to move down. When the top mold 4 rises, it can pull the mounting plate 8 to its original position by contraction, and at the same time buffer the impact force between the components to extend 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 with the bottom baffle 10, it can prevent the mounting plate 8 from continuing to move down, thereby controlling the moving distance of the rack 11, and ensuring the subsequent accurate rotation angle of the half gear 12.

[0022] In this embodiment, the lifting and lowering of the top mold 4 is controlled by the cylinder 3, and the lifting rod 5 can synchronously transmit the movement of the top mold 4 to the pull plate 6 to realize mechanical linkage. The pull plate 6, the first guide rod 7 and the mounting plate 8 are used to provide a stable guide for the subsequent movement of the rack 11, and the first spring 9 can play a buffering and resetting role in the lifting process 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 to ensure the rotation accuracy of the bottom mold 18.

[0023] In the second embodiment, a rack 11 is fixedly connected to the outer wall of one side of the mounting plate 8, and a half gear 12 is meshed 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 is meshed on the outer wall of the first bevel gear 14, and a swing column 16 is fixedly connected to the center of the outer wall of the top of the second bevel gear 15, a mold frame 17 is welded to the outer wall of the top 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.

[0024] Through the above scheme, the rack 11 is fixed to one side of the mounting plate 8 and moves with the linear motion of the mounting plate 8. It meshes with the half gear 12, and can convert 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 installed through the gear shaft 13, and its number of teeth is designed to ensure that it rotates 180° just driven by 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, and can synchronously transmit the rotation of the half gear 12 to the first bevel gear 14 to ensure the continuity of power transmission. The first bevel gear 14 is vertically meshed with the second bevel gear 15, which can change the direction of power transmission. The vertical rotation is converted into horizontal rotation, thereby driving 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 synchronously by 180°, thereby realizing the precise switching of the bottom mold 18 between the 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 to prevent the bottom mold 18 from shaking during the rotation and mold closing process, thereby ensuring the molding accuracy of the pouring wax mold; 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 limiting, thereby avoiding excessive rotation of the bottom mold 18, and further improving the accuracy of the device operation.

[0025] In this embodiment, the engagement 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, and the engagement of the first bevel gear 14 and the second bevel gear 15 changes the direction of power transmission, so that the swing column 16 can drive the mold frame 17 to rotate. The swing column 16 rotates 180° to accurately transfer the bottom mold 18 to the bottom of the top mold 4, realizing automatic loading.

[0026] In the third embodiment, a wax mold ejection assembly 19 is provided at the bottom of the bottom mold 18, and a semicircular 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, a push rod 194 and a push pin 195, wherein 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, the push rod 194 includes two, and the two push rods 194 are welded to the top outer wall of the connecting plate 192, the push pin 195 is welded to the top outer wall of the push rod 194, wherein the push pin 195 is arranged on the bottom inner wall of the bottom mold 18, and the traction head 193 is tightly attached to the top outer wall of the semicircular inclined slide 20.

[0027] Through the above scheme, the wax mold ejection assembly 19 is installed at the bottom of the bottom mold 18. It is the core structure for realizing automatic demoulding of the wax mold for pouring and riser, which can avoid 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 to the low position along the semicircular inclined slide 20, it can pull the connecting plate 192 to reset by shrinking, driving the ejector pin 195 to retract the bottom mold 18 to prepare for the next wax injection; the connecting plate 192 serves as an intermediate connecting piece, which 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 to ensure that the ejector rods 194 move synchronously; the two ejector rods 194 are symmetrically arranged, which can stably push The movable ejector 195 prevents the ejector 195 from tilting during the ejection process, thereby avoiding damage to the pouring wax mold; the ejector 195 is located on the bottom inner wall of the bottom mold 18, and its top is in contact with the pouring wax mold. Under the push of the ejector rod 194, the pouring wax mold can be lifted upward to separate the pouring wax mold from the inner wall of the bottom mold 18, greatly reducing the difficulty of taking out the material; the semicircular inclined slide 20 has a height difference, with the side close to the top mold 4 being lower and the side away from the top mold 4 being higher. 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 195 to move. No additional power source is required, thereby realizing the automation and energy saving of the demoulding action.

[0028] 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 pin 194, realizing uniform force transmission. When the traction head 193 slides along the semicircular inclined slide 20, the height difference of the semicircular inclined slide 20 can be converted into an upward thrust to drive the ejector pin 194 to move. The ejector pin 194 can accurately push the ejector pin 195 to ensure that the ejector pin 195 stably ejects the wax mold, avoids the wax mold of the pouring riser from adhering to the bottom mold 18, reduces the difficulty of material removal, and utilizes the height difference design of the semicircular inclined slide 20 to provide a motion trajectory for the traction head 193, realizes the automatic ejection action of the ejector pin 195, and does not require additional power, thereby improving the energy efficiency of the device.

[0029] Positioning posts 21 are provided around the outer wall of the bottom of the top mold 4, and positioning holes are opened around the outer wall of the top of the bottom mold 18, and the positioning posts 21 correspond to the positioning holes one by one.

[0030] Through the above scheme, the positioning columns 21 correspond one-to-one with the positioning holes of the bottom mold 18. When the top mold 4 is lowered to close the mold, the positioning columns 21 will first be inserted into the positioning holes to accurately calibrate the positions of the top mold 4 and the bottom mold 18, thereby avoiding problems such as flash and dimensional deviation in the wax mold due to mold misalignment, and improving the molding quality of the pouring wax mold; at the same time, the positioning columns 21 can also provide guidance for the top mold 4 during the mold closing process, ensuring that the top mold 4 is pressed stably on the bottom mold 18, reducing mold collision damage.

[0031] 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 pipe 24 for connecting to a wax injection machine. The bottom outer wall of the top mold 4 is provided with adjacently distributed nozzles 25, and the nozzles 25 and the wax injection tube 22 are connected to each other.

[0032] Through the above scheme, the wax injection pipe 22 is fixed to the top mold 4, and is the channel for the wax liquid to enter the top mold 4; the pipe joint 23 connects the wax injection pipe 22 and the wax inlet pipe 24, which is convenient for the installation and disassembly of the wax inlet pipe 24, while ensuring the sealing of the wax liquid transportation to prevent the wax liquid from leaking; the wax inlet pipe 24 connects the wax injection machine and the pipe joint 23, and can stably transport the wax liquid in the wax injection machine to the wax injection pipe 22; the nozzle 25 is evenly distributed at the bottom of the top mold 4 and is connected to the wax injection pipe 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, resulting in defects such as bubbles and material shortages in the pouring wax mold, and ensuring the integrity and density of the pouring wax mold.

[0033] Side plates 26 are welded to the outer walls on both sides of the top mold 4 , 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 provided through the top outer wall of the gantry 2 .

[0034] Through the above scheme, the second guide rod 27 is fixed on the side plate 26 and passes through the gantry 2, which can provide dual guidance for the lifting and lowering movement of the top mold 4, preventing the top mold 4 from shifting left and right or shaking during the movement, and ensuring that the top mold 4 always moves in the vertical direction.

[0035] The outer wall of the bottom of the processing table 1 is fixedly connected to the protective box 28 by screws, and a rectangular groove 29 is opened on the outer wall of one side of the protective box 28. The pull plate 6 is arranged on 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.

[0036] Through the above-mentioned scheme, 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 the half gear 12 from the outside world, and effectively prevent impurities such as dust, metal debris, and wax residue from entering the protective box 28, thereby avoiding failure of components due to impurities being stuck or worn; the rectangular groove 29 is adapted to the pull plate 6, which not only provides sufficient space for the up and down movement of the pull plate 6, but also limits the lateral displacement of the pull plate 6 through the edge of the groove, ensuring the stable movement of the pull plate 6.

[0037] The outer wall on the other side of the mounting plate 8 is welded with adjacent limiting strips 30 , and the pull plate 6 is arranged between the two limiting strips 30 .

[0038] Through the above-mentioned scheme, the two limit bars 30 are symmetrically welded on one side of the mounting plate 8 to form a lateral limit space for the pull plate 6, which can limit the left and right deviation of the pull plate 6 during the 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, avoiding the misalignment of the rack 11 and the half gear 12 due to the deviation of the pull plate 6, ensuring the stable operation of the transmission mechanism, and reducing the probability of mechanical failure.

[0039] 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. The top outer wall of the bottom baffle 10 is fixedly connected to a bearing seat 33 by screws, and the gear shaft 13 is rotatably connected to the inner wall of the bearing seat 33.

[0040] 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, so that the bottom baffle 10 maintains a stable support state, and prevents the bottom baffle 10 from being displaced or deformed when subjected to the pressure of the mounting plate 8; the third guide rod 32 is fixed to the bottom of the processing table 1 and passes through the mounting plate 8, cooperating with the first guide rod 7 to form a double guide, further limiting 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 movement of the rack 11; the bearing seat 33 is fixed on the bottom baffle 10, providing stable rotation support for the gear shaft 13, reducing the friction resistance of the gear shaft 13 during rotation, and at the same time ensuring the coaxiality of the gear shaft 13, the half gear 12, and the first bevel gear 14, ensuring transmission efficiency and accuracy.

[0041] 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. The top outer wall of the support frame 34 is fixedly connected to a PLC controller 35 by screws, and 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 through signal lines.

[0042] Through the above-mentioned scheme, the support legs are welded to the bottom of the processing table 1, and the support frame 34 connects the two support legs to provide a solid installation platform for the PLC controller 35 to prevent the PLC controller 35 from shifting due to vibration; the PLC controller 35 is connected to the start and stop button 36, the wax injection machine and the cylinder 3 through the signal line, and can preset and execute the complete process of pouring and rising 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 automatic control of the device, and reduce the manual operation steps.

[0043] Working Principle: Before operating this device, the wax inlet pipe 24 must be connected to an external wax injector via the pipe joint 23. The PLC controller 35 also presets parameters such as the stroke of the cylinder 3 and the injection time of the wax injector. To start the device, the operator presses the start / stop button 36, and the PLC controller 35 issues a command to control the piston rod of the cylinder 3 to extend downward, pushing the top mold 4 downward synchronously. When the top mold 4 moves down, the lifting rod 5 on one side will drive the pulling plate 6 to move downward synchronously along the rectangular slot 29. Since the first spring 9 is connected between the pulling plate 6 and the mounting plate 8, and the pulling plate 6 is limited in lateral displacement by the limiting bar 30, during the downward movement of the pulling plate 6, the mounting plate 8 will be pulled downward along the third guide rod 32 and the first guide rod 7 by the first spring 9. 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 drives the meshed second bevel gear 15 to rotate, and finally makes the swing column 16 at the top of the second bevel gear 15 drive the mold frame 17 and the bottom mold 18 to rotate. When the half gear 12 rotates 180°, the mounting plate 8 just abuts the top of the bottom baffle 10, and the bottom baffle 10 limits the mounting plate 8 to continue to move down, the half gear 12 stops rotating, and the bottom mold 18 is accurately transferred to the bottom of the top mold 4, completing automatic loading. Subsequently, the cylinder 3 continues to push the top mold 4 downward, the first spring 9 is further stretched, and the positioning post 21 at the bottom of the top mold 4 is first inserted into the positioning hole of the bottom mold 18, achieving 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, the PLC controller 35 controls the wax injection machine to start, and the wax liquid enters the wax injection pipe 22 through the wax inlet pipe 24 and the pipe joint 23, and is then 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 formed into a pouring wax pattern in the bottom mold 18; After the wax mold of the pouring and riser 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, and the top mold 4 and the bottom mold 18 are gradually separated. When the positioning column 21 is completely pulled out of the positioning hole of the bottom mold 18, the first spring 9 begins to contract, pulling the mounting plate 8 to reset upward, and the rack 11 moves upward with the mounting plate 8, driving the half gear 12 to rotate 180° in the opposite direction, and controlling the swing column 16 to drive the bottom mold 18 to reset in the opposite direction. During the resetting process, the traction head 193 of the wax mold ejection assembly 19 at the bottom of the bottom mold 18 slides along the top outer wall of the semicircular inclined slide 20 (the semicircular inclined slide 20 is higher away from the top mold 4 side), and 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, and the ejector rod 194 pushes the ejector pin 195 to lift the pouring wax mold in the bottom mold 18 upward, so that the pouring wax mold is separated from the inner wall of the bottom mold 18, and automatic demolding is achieved.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A rapid prototyping device for a pouring and riser wax mold, comprising a processing table (1), characterized in that: The top outer wall of the processing table (1) is fixedly connected to the gantry (2) by screws, and the top outer wall of the gantry (2) is fixedly connected to the cylinder (3) by screws, the piston rod of the cylinder (3) is fixedly connected to the top mold (4), and the outer wall of one side of the top mold (4) is fixedly connected to the lifting rod (5) by screws, the bottom outer wall of the lifting rod (5) is fixedly connected to the pull plate (6) by screws, and a first guide rod (7) is provided through the outer wall of one end of the pull plate (6), a mounting 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 mounting plate (8) and the pull plate (6), and a bottom baffle (10) is provided at the bottom of the mounting plate (8); A rack (11) is fixedly connected to the outer wall of one side of the mounting plate (8), and a half gear (12) is meshed 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) is meshed on the outer wall of the first bevel gear (14), and a swing column (16) is fixedly connected to the center of the outer wall of the top of the second bevel gear (15), a mold frame (17) is welded to the outer wall of the top of the swing column (16), and a bottom mold (18) is provided on the inner wall of the mold frame (17); A wax mold ejection assembly (19) is provided at the bottom of the bottom mold (18), and a semicircular inclined slide (20) is provided on the outer wall of the top of the processing table (1) below the wax mold ejection assembly (19).

2. A rapid prototyping device for a pouring and riser wax pattern according to claim 1, characterized in that: The wax mold ejection assembly (19) includes a second spring (191), a connecting plate (192), a traction head (193), a push rod (194) and a push pin (195), wherein 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 push rods (194), and both push rods (194) are welded to the top outer wall of the connecting plate (192), and the push pin (195) is welded to the top outer wall of the push rod (194), wherein the push pin (195) is arranged on the bottom inner wall of the bottom mold (18), and the traction head (193) is tightly attached to the top outer wall of the semicircular inclined slide (20).

3. A rapid prototyping device for a pouring and riser wax pattern according to claim 1, characterized in that: When the swing column (16) rotates 180 degrees, the pull plate (6) is in close contact with the top outer wall of the bottom baffle (10).

4. A rapid prototyping device for a pouring and riser wax pattern according to claim 1, characterized in that: Positioning columns (21) are provided on all four sides of the bottom outer wall of the top mold (4), and positioning holes are opened on all four sides of the top outer wall of the bottom mold (18), and the positioning columns (21) and the positioning holes correspond one to one.

5. The rapid prototyping device for a pouring and riser wax pattern according to claim 1, characterized in that: A wax injection pipe (22) is fixedly connected to the top outer wall of the top mold (4), and a pipe joint (23) is installed on the outer wall of one end of the wax injection pipe (22). A wax inlet pipe (24) for connecting to a wax injection machine is fixedly connected to the bottom outer wall of the pipe joint (23). Adjacently distributed nozzles (25) are provided on the bottom outer wall of the top mold (4), and the nozzles (25) and the wax injection pipe (22) are communicated with each other.

6. The rapid prototyping device for a pouring and riser wax pattern according to claim 1, characterized in that: Side plates (26) are welded to the outer walls on both sides of the top mold (4), and the top outer walls of the side plates (26) are fixedly connected to second guide rods (27), which are arranged through the top outer wall of the gantry (2).

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

8. The rapid prototyping device for a pouring and riser wax pattern according to claim 1, characterized in that: The outer wall on the other side of the mounting plate (8) is welded with adjacently distributed limiting strips (30), and the pull plate (6) is arranged between the two limiting strips (30).

9. The rapid prototyping device for a pouring and riser wax pattern according to claim 1, 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), and the third guide rod (32) is fixedly connected to the bottom outer wall of the processing table (1). The top outer wall of the bottom baffle (10) is fixedly connected to a bearing seat (33) by screws, and the gear shaft (13) is rotatably connected to the inner wall of the bearing seat (33).

10. The rapid prototyping device for a pouring and riser wax pattern according to claim 5, characterized in that: Support legs are welded around the outer wall of the bottom 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 outer wall of the top of the support frame (34) by screws, and a start-stop button (36) is provided at a corner of one side of the outer wall of the top 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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