Dewaxing equipment for removing wax mold in precision investment casting and operation method of dewaxing equipment

Abstract

The invention relates to the technical field of dewaxing equipment, and particularly discloses dewaxing equipment for removing a wax mold in investment precision casting and an operation method thereof.The dewaxing equipment comprises a treatment box, a fixing plate is fixedly connected to one side of the treatment box, and a lifting mechanism is arranged on one side of the fixing plate; one side of the fixing plate is slidably connected with an assembling frame through a lifting mechanism, a pushing mechanism is installed on the assembling frame, the pushing mechanism is used for driving a net base on the inner side of the assembling frame to do stable back-and-forth reciprocating motion, the position of a mold shell in the net base can be continuously changed in hot water, a static water layer around the mold shell is broken, and the mold shell is prevented from being damaged. High-temperature hot water can continuously make full contact with the surface of the mold shell and an internal mold cavity, the situation that the melting speed of a wax mold is reduced due to local water temperature reduction is avoided, meanwhile, flowing water can take away molten wax liquid from the surface of the mold shell in time, the dewaxing efficiency is further improved, it is guaranteed that the mold shells at different positions can be evenly dewaxed, and the dewaxing quality is improved. And subsequent casting forming quality is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of dewaxing equipment technology, and in particular to a dewaxing device and its operating method for removing wax patterns in investment casting. Background Technology

[0002] In investment casting, the dewaxing process is a key step connecting wax pattern making and shell forming. Its core purpose is to safely and efficiently remove the wax pattern to create a hollow cavity for subsequent pouring of molten metal. Typically, the wax pattern assembly is immersed in a heat medium and heated at high temperature to soften and melt the wax pattern, which then gradually flows out of the shell.

[0003] For example, Chinese Patent No. CN104325078B discloses a dewaxing device for removing wax patterns in investment casting. The device is used to remove wax patterns made primarily of polystyrene in investment casting. The dewaxing device includes: a guide carriage, a guide rail, a first resistance wire, a second resistance wire, a heating contact device, a cable, an air inlet, a dewaxing carriage, an oxygen cylinder, an exhaust fan, a dust removal device, a dust removal exhaust port, a chamber, and a chamber door.

[0004] The aforementioned patent removes wax from inside the mold shell by heating and burning. However, it has the following technical defects: the high-temperature flame of the combustion dewaxing method can easily cause uneven heating of the thin-walled mold shell, leading to cracking and deformation of the mold shell, resulting in a decrease in the dimensional accuracy of the subsequent castings. In addition, the wax material will produce harmful fumes during the combustion process, which not only pollutes the production environment, but also requires additional dust removal and exhaust devices, increasing equipment investment and maintenance costs, which does not meet the requirements of green production. Summary of the Invention

[0005] The purpose of this invention is to provide a dewaxing device and its operating method for removing wax patterns in investment casting, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a dewaxing device for removing wax patterns in investment casting, comprising a processing box, a fixed plate fixedly connected to one side of the processing box, a lifting mechanism provided on one side of the fixed plate, an assembly frame slidably connected to one side of the fixed plate via the lifting mechanism, a pushing mechanism provided on one side of the assembly frame, a mesh seat movably connected inside the assembly frame via the pushing mechanism, clamping components provided on both sides of the mesh seat, a fixed frame fixedly connected to one side of the processing box on the fixed plate, a liquid guide pipe fixedly connected to the top of the fixed frame, a nozzle fixedly connected to the bottom of the liquid guide pipe, the nozzle being located directly above the mesh seat, an ultrasonic transducer fixedly connected to one side of the interior of the processing box, an ultrasonic generator fixedly connected to one side of the processing box on the ultrasonic transducer, a first drain pipe fixedly connected to the upper side of one end of the processing box, a second drain pipe fixedly connected to the lower side of one end of the processing box, and electric heating plates fixedly connected to both sides of the interior of the processing box and the assembly frame.

[0007] Furthermore, the lifting mechanism includes a first motor, which is fixedly connected to one side of the top of the fixed plate. A shaft bracket is fixedly connected to one side of the top of the fixed plate, and the first motor is fixedly connected to the shaft bracket. A worm gear is fixedly connected to the output end of the first motor. A worm wheel is meshed with one side of the worm gear, and a lead screw is fixedly connected to one side of the worm wheel. The lead screw is rotatably connected to the inside of the fixed plate. A screw seat is threaded to the outer surface of the lead screw. One side of the screw seat is slidably connected to the inside of the fixed plate. Both sides of the screw seat extending out of the fixed plate are fixedly connected to the lifting brackets. The common end of the two lifting brackets is fixedly connected to one side of the assembly frame.

[0008] Furthermore, a first limiting groove is provided on both sides of the interior of the fixing plate, and a first limiting block is slidably connected inside the first limiting groove. One side of the first limiting block is fixedly connected to one side of the screw seat.

[0009] Furthermore, the pushing mechanism includes a power component, which is located on one side of the assembly frame. An eccentric cam is rotatably connected to the inner side of the assembly frame via the power component. A waist-shaped frame is movably connected to the outer side of the eccentric cam. A transmission rod is fixedly connected to both sides of the waist-shaped frame. A transmission plate is fixedly connected to one side of the transmission rod. The common side of the two transmission plates is connected to the mesh base. A guide frame is fixedly connected to one side of the assembly frame. One side of the transmission rod is slidably connected to the guide frame.

[0010] Furthermore, the power assembly includes a second motor, which is fixedly connected to the outer side of the assembly frame. A pinion is fixedly connected to the output end of the second motor, and a large gear is meshed with one side of the pinion. A shaft is fixedly connected to one side of the large gear, and one side of the shaft is fixedly connected to one side of the eccentric cam.

[0011] Furthermore, a guide groove is provided inside one side of the transmission plate, and a guide block is slidably connected inside the guide groove. One end of the guide block is fixedly connected to one end of the mesh base. A spring is fixedly connected between the guide block and the guide groove. A guide rod is fixedly connected to the middle side inside the guide groove. The guide block is slidably connected to the guide rod. A second limiting groove is provided on both sides inside the guide groove. A second limiting block is slidably connected inside the second limiting groove. One side of the second limiting block is fixedly connected to one side of the guide block.

[0012] Furthermore, the clamping component includes a cylinder, which is fixedly connected to both sides of the mesh base. The output end of the cylinder is fixedly connected to a clamping plate, and the clamping plate has mesh holes inside, with multiple mesh holes.

[0013] A method for a dewaxing device used to remove wax patterns in investment casting includes the following steps: S1. Inject clean water into the tank through the water inlet of the processing tank, start the electric heating plates on both sides inside the processing tank and the assembly frame, set the water temperature to 85-95℃ through the temperature control system to meet the common wax mold melting requirements, and keep the electric heating plates in a low temperature state after the temperature sensor shows that the water temperature is stable within the set range to provide a continuous and stable thermal environment for dewaxing. S2. Start the first motor of the lifting mechanism, which drives the assembly frame and mesh seat to rise to the operating height above the processing box through worm gear and screw seat transmission. Place the mold shell to be dewaxed stably in the center of the mesh seat. Start the clamping cylinders on both sides of the mesh seat. The cylinders push the clamping plates closer to the mold shell until the clamping plates on both sides are tightly attached to the mold shell, so as to firmly fix the mold shell and prevent displacement during subsequent movement. S3. Turn on the external water supply equipment. Clean water is delivered to the nozzle through the liquid guide pipe. The nozzle sprays a uniform water flow onto the mold shell on the mesh base to rinse the surface of the mold shell for 1-2 minutes. The impact force of the water flow is used to initially remove the floating dust and wax residue attached to the surface of the mold shell. S4. Restart the first motor of the lifting mechanism, control the lead screw to rotate in the opposite direction so that the screw seat drives the assembly frame and the mesh seat to slowly descend until the mold shell is completely submerged in the constant temperature hot water of the treatment tank. Turn off the first motor. The self-locking property of the worm gear structure keeps the mesh seat stably in this position. Simultaneously start the second motor of the ultrasonic generator and the push mechanism. The ultrasonic transducer converts the high-frequency electrical signal into mechanical vibration and transmits it to the water to form a cavitation effect. S5. Next, the second motor drives the eccentric cam to rotate through the small gear and large gear reduction transmission, which pushes the waist frame and transmission rod to reciprocate, thereby driving the mesh base and mold shell to move back and forth smoothly in the hot water, continuously contacting the hot water to remove wax. S6. Under the combined effect of ultrasonic cavitation and reciprocating motion of the mold shell, the wax mold inside the mold shell is heated and melted. The melted wax flows out of the mold shell cavity under the disturbance of water flow and gravity, floats to the surface of hot water through the mesh of the mesh seat and clamping plate, and opens the valve of the first drain pipe every 5-8 minutes. Using the density difference between wax and water, the upper pure wax flows into the recovery container through the drain pipe. S7. Depending on the size of the mold shell and the wax content, continue dewaxing for 10-20 minutes. Then, turn off the ultrasonic generator and the second motor, and then start the lifting mechanism to raise the mesh base and the mold shell to the operating height. After the surface moisture of the mold shell has been initially drained and the temperature has dropped to room temperature, control the clamping cylinder to retract, so that the clamping plate is removed from the mold shell. Take out the processed mold shell to complete the single dewaxing operation.

[0014] Compared with the prior art, the beneficial effects of the present invention are: Firstly, in this invention, a water supply device is connected via a liquid guide pipe. The water supply device sprays water through nozzles onto the mold shell inside the mesh holder, achieving preliminary rinsing of the mold shell. This removes floating dust and loose wax debris adhering to the surface of the mold shell in advance. After rinsing, the mesh holder is moved smoothly downwards by a lifting mechanism, allowing the mold shell inside the mesh holder to be completely immersed in the hot water in the treatment tank for dewaxing. During this process, an ultrasonic generator generates a high-frequency electrical signal and transmits it to an ultrasonic transducer. The ultrasonic transducer converts the electrical signal into high-frequency mechanical vibration and transmits it to the water, forming a large number of microbubbles. The local high pressure and impact force generated when the bubbles burst can efficiently peel off the wax layer adhering to the inner wall of the mold shell, while accelerating the melting of the wax mold. Even the wax material in complex cavities or small gaps inside the mold shell can be fully removed, greatly improving the thoroughness of dewaxing. Treating wax with a water medium will not cause the mold shell to crack, nor will it cause environmental pollution due to combustion.

[0015] Secondly, in this invention, by installing a pushing mechanism on the assembly frame, the pushing mechanism drives the mesh seat inside the assembly frame to make stable back-and-forth reciprocating motion, so that the mold shell inside the mesh seat can continuously change position in hot water, breaking the static water layer around the mold shell, allowing the high-temperature hot water to continuously and fully contact the surface of the mold shell and the internal cavity, avoiding the local water temperature drop that would slow down the melting speed of the wax mold. At the same time, the flowing water can also carry away the melted wax from the surface of the mold shell in time, further improving the dewaxing efficiency, ensuring that the mold shells in different positions can be dewaxed evenly, and ensuring the quality of subsequent casting. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a bottom view of the processing box structure in this invention; Figure 3 This is a top view of the processing box structure in this invention; Figure 4This is a schematic diagram of the assembly frame and mesh base structure in this invention; Figure 5 This is a schematic diagram of one side of the transmission plate in this invention; Figure 6 In this invention Figure 3 A magnified structural diagram at point A; Figure 7 In this invention Figure 3 A magnified structural diagram at point B; Figure 8 In this invention Figure 4 A magnified structural diagram at point C.

[0017] In the diagram: 1. Processing box; 2. Fixing plate; 3. Assembly frame; 4. Mesh base; 5. Fixing frame; 6. Liquid guide tube; 7. Nozzle; 8. Lifting mechanism; 81. First motor; 82. Worm gear; 83. Shaft bracket; 84. Worm wheel; 85. Lead screw; 86. Screw seat; 87. First limiting block; 88. First limiting groove; 89. Elevating frame; 9. Ultrasonic transducer; 10. Ultrasonic generator; 11. Pushing mechanism; 111. Eccentric cam; 112. Waist-shaped frame; 113. Transmission rod; 114. Transmission plate; 1141. Guide groove; 1142. Guide block; 1143. Spring; 1144. Guide rod; 1145. Second limiting groove; 1146. Second limiting block; 115. Power assembly; 1151. Second motor; 1152. Pinion; 1153. Gear; 1154. Shaft; 116. Guide frame; 12. Clamping component; 121. Cylinder; 122. Clamping plate; 123. Mesh; 13. First drain pipe; 14. Second drain pipe. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-8In this embodiment of the invention, a dewaxing device for removing wax patterns in investment casting includes a processing box 1. A fixed plate 2 is fixedly connected to one side of the processing box 1. A lifting mechanism 8 is provided on one side of the fixed plate 2. An assembly frame 3 is slidably connected to one side of the fixed plate 2 via the lifting mechanism 8. A pushing mechanism 11 is provided on one side of the assembly frame 3. A mesh base 4 is movably connected inside the assembly frame 3 via the pushing mechanism 11. Clamping members 12 are provided on both sides of the mesh base 4. A fixed frame 5 is fixedly connected to one side of the processing box 1 located on the fixed plate 2. A liquid guide pipe 6 is fixedly connected to the top of the fixed frame 5. A nozzle 7 is fixedly connected to the bottom end of the liquid guide pipe 6. The nozzle 7 is located directly above the mesh base 4. An ultrasonic transducer is fixedly connected to one side of the interior of the processing box 1. 9. An ultrasonic generator 10 is fixedly connected to one side of the ultrasonic transducer 9 on the processing box 1. A first drain pipe 13 is fixedly connected to the upper side of one end of the processing box 1, and a second drain pipe 14 is fixedly connected to the lower side of one end of the processing box 1. Both the first drain pipe 13 and the second drain pipe 14 are equipped with switch valves. Electric heating plates are fixedly connected to both sides of the interior of the processing box 1 and the assembly frame 3. The dewaxing method of hot water immersion combined with ultrasonic vibration is adopted to replace the traditional combustion dewaxing, avoiding damage to the mold shell by high temperature flame. At the same time, the electric heating plate can provide double heating and heat preservation for the water in the processing box 1 and the assembly frame 3, ensuring that the water temperature is stable within the appropriate range for wax mold melting during the dewaxing process, thereby improving the dewaxing efficiency. The design of the mesh base 4 facilitates water flow, allowing all parts of the mold shell to fully contact the hot water.

[0020] Please see Figure 1 , Figure 6 , Figure 7The lifting mechanism 8 includes a first motor 81, which is fixedly connected to one side of the top of the fixed plate 2. A shaft bracket 83 is fixedly connected to one side of the top of the fixed plate 2, and the first motor 81 is fixedly connected to the shaft bracket 83. A worm gear 82 is fixedly connected to the output end of the first motor 81. A worm wheel 84 is meshed with one side of the worm gear 82, and a lead screw 85 is fixedly connected to one side of the worm wheel 84. The lead screw 85 is rotatably connected inside the fixed plate 2, and a screw seat 86 is threaded onto the outer surface of the lead screw 85. One side of the screw seat 86 is slidably connected inside the fixed plate 2. Both sides of the screw seat 86 extending out of the fixed plate 2 are fixedly connected to extension brackets 89. A common end of the two extension brackets 89 is fixedly connected to one side of the assembly frame 3. When the first motor 81 is started, the first motor 8... 1. The worm gear 82 rotates, which in turn drives the meshing worm wheel 84 to rotate. The worm wheel 84 then drives the lead screw 85 to rotate synchronously. Since the lead screw 85 is threadedly connected to the screw seat 86, and the screw seat 86 is limited by the fixing plate 2 and cannot rotate with the lead screw 85, the rotational motion of the lead screw 85 is converted into the linear lifting and lowering motion of the screw seat 86 along the lead screw 85. The screw seat 86 drives the assembly frame 3 and the internal mesh seat 4 and mold shell to lift and lower through the raising frame 89, adjusting the position of the mold shell inside the mesh seat 4. The combination of worm gear 82, worm wheel 84, lead screw 85, and screw seat 86 has the advantages of smooth transmission and good self-locking. It can accurately control the lifting height of the mesh seat 4, ensuring that the mold shell can be completely immersed in hot water or smoothly removed from the water surface. At the same time, the self-locking function can make the mesh seat 4 stably stay at any height, which is convenient for washing, maintenance, and other operations.

[0021] Please see Figure 7 The fixed plate 2 has a first limiting groove 88 on both sides inside. A first limiting block 87 is slidably connected inside the first limiting groove 88. One side of the first limiting block 87 is fixedly connected to one side of the screw seat 86. When the screw seat 86 moves up and down along the lead screw 85, it will drive the first limiting block 87 to slide synchronously in the first limiting groove 88. The first limiting groove 88 forms a precise constraint on the movement trajectory of the first limiting block 87, effectively preventing the screw seat 86 from deflecting or jamming due to uneven force during the movement, ensuring that the screw seat 86 always moves smoothly along a straight line, thereby ensuring the stability of the lifting of the assembly frame 3 and the mesh seat 4.

[0022] Please see Figure 6 and Figure 8The pushing mechanism 11 includes a power assembly 115, which is located on one side of the assembly frame 3. An eccentric cam 111 is rotatably connected to the inner side of the assembly frame 3 via the power assembly 115. A waist-shaped frame 112 is movably connected to the outer side of the eccentric cam 111. Transmission rods 113 are fixedly connected to both sides of the waist-shaped frame 112. A transmission plate 114 is fixedly connected to one side of each transmission rod 113. The common side of the two transmission plates 114 is connected to the mesh base 4. A guide frame 116 is fixedly connected to the inner side of the assembly frame 3, and one side of the transmission rod 113 is slidably connected to the guide frame 116. The power assembly 115 includes a second motor 1151, which is fixedly connected to the outer side of the assembly frame 3. A pinion 1152 is fixedly connected to the output end of the second motor 1151, and a large gear 1152 is meshed with one side of the pinion 1152. 153, a shaft 1154 is fixedly connected to one side of the large gear 1153, and one side of the shaft 1154 is fixedly connected to one side of the eccentric cam 111; the second motor 1151 is started, and the second motor 1151 drives the small gear 1152 to rotate, the small gear 1152 drives the meshing large gear 1153 to rotate, and the large gear 1153 drives the eccentric cam 111 to rotate through the shaft 1154. Since the eccentric cam 111 is movably connected to the waist frame 112, the eccentric rotation of the eccentric cam 111 will push the waist frame 112 to move back and forth. The waist frame 112 drives the transmission rods 113 on both sides to move synchronously. The transmission rods 113 slide back and forth along a straight line under the constraint of the guide frame 116, and drive the mesh seat 4 to move back and forth through the transmission plate 114. By driving the mesh seat 4 to move back and forth, the mold shell continuously changes position in the hot water, improving the contact between the hot water and the mold shell, and accelerating the melting and discharge of the wax mold.

[0023] Please see Figure 5The transmission plate 114 has a guide groove 1141 inside one side. A guide block 1142 is slidably connected inside the guide groove 1141. One end of the guide block 1142 is fixedly connected to one end of the mesh base 4. A spring 1143 is fixedly connected between the guide block 1142 and the guide groove 1141. A guide rod 1144 is fixedly connected to the middle side inside the guide groove 1141. The guide block 1142 is slidably connected to the guide rod 1144. A second limiting groove 1145 is opened on both sides inside the guide groove 1141. A second limiting groove is slidably connected inside the second limiting groove 1145. Block 1146, one side of the second limiting block 1146 is fixedly connected to one side of the guide block 1142; when the transmission plate 114 drives the mesh base 4 to reciprocate, the guide block 1142 will slide along the guide rod 1144 in the guide groove 1141, while compressing or stretching the spring 1143, further causing the mesh base 4 to move back and forth to vibrate, which facilitates the wax removal of the mold shell in hot water. The cooperation between the guide rod 1144 and the guide groove 1141 ensures that the guide block 1142 slides smoothly. The sliding of the second limiting block 1146 in the second limiting groove 1145 further improves the motion stability of the guide block 1142 and prevents it from deviating.

[0024] Please see Figure 4 The clamping component 12 includes a cylinder 121, which is fixedly connected to both sides of the mesh base 4. The output end of the cylinder 121 is fixedly connected to a clamping plate 122. The clamping plate 122 has mesh holes 123 inside, and there are multiple mesh holes 123. When the mold shell is placed on the mesh base 4, the cylinders 121 on both sides are activated. The cylinders 121 push the clamping plate 122 to move towards the mold shell until the clamping plates 122 on both sides firmly clamp and fix the mold shell, so that the mold shell can move back and forth in the hot water with the mesh base 4 to avoid collision with the mesh base 4. The multiple mesh holes 123 on the clamping plate 122 can ensure that the hot water can pass through the clamping plate 122 smoothly and contact the surface of the mold shell without affecting the water flow due to the obstruction of the clamping plate 122. At the same time, it is also convenient for the molten wax to be discharged from the mesh holes 123, improving the dewaxing efficiency.

[0025] A method for a dewaxing device used to remove wax patterns in investment casting includes the following steps: S1. Inject clean water into the tank through the water inlet of the treatment tank 1, start the electric heating plates on both sides inside the treatment tank 1 and the assembly frame 3, set the water temperature to 85-95℃ through the temperature control system to meet the common wax mold melting requirements, and keep the electric heating plate in a low temperature state after the temperature sensor shows that the water temperature is stable within the set range, so as to provide a continuous and stable thermal environment for dewaxing. S2. Start the first motor 81 of the lifting mechanism 8, which drives the assembly frame 3 and the mesh seat 4 to rise to the operating height above the processing box 1 through the worm gear 82, worm wheel 84, screw 85 and screw seat 86. Place the mold shell to be dewaxed stably in the center of the mesh seat 4. Start the clamping cylinders 121 on both sides of the mesh seat 4. The cylinders 121 push the clamping plates 122 towards the mold shell until the clamping plates 122 on both sides are tightly attached to the mold shell, so as to achieve a firm fixation of the mold shell and prevent displacement during subsequent movements. S3. Turn on the external water supply equipment. Clean water is delivered to the nozzle 7 through the liquid guide pipe 6. The nozzle 7 sprays a uniform water flow onto the mold shell on the mesh base 4 to rinse the surface of the mold shell for 1-2 minutes. The water flow impact force is used to initially remove the floating dust and wax residue attached to the surface of the mold shell. S4. Restart the first motor 81 of the lifting mechanism 8, control the lead screw 85 to rotate in the opposite direction so that the screw seat 86 drives the assembly frame 3 and the mesh seat 4 to slowly descend until the mold shell is completely submerged in the constant temperature hot water of the treatment box 1. Turn off the first motor 81. The self-locking structure of the worm gear 82 and worm wheel 84 keeps the mesh seat 4 stably in this position. Simultaneously start the second motor 1151 of the ultrasonic generator 10 and the pushing mechanism 11. The ultrasonic transducer 9 converts the high-frequency electrical signal into mechanical vibration and transmits it to the water to form a cavitation effect. S5. Next, the second motor 1151 drives the eccentric cam 111 to rotate through the small gear 1152 and the large gear 1153, which in turn drives the waist frame 112 and the transmission rod 113 to reciprocate, thereby driving the mesh base 4 and the mold shell to move back and forth smoothly in the hot water and continuously contact the hot water to remove wax. S6. Under the combined effect of ultrasonic cavitation and reciprocating motion of the mold shell, the wax mold inside the mold shell is heated and melted. The melted wax flows out of the mold shell cavity under the disturbance of water flow and gravity, floats to the surface of hot water through the mesh 123 of the mesh base 4 and the clamping plate 122, and opens the valve of the first drain pipe 13 every 5-8 minutes. Using the density difference between the wax liquid and water, the upper pure wax liquid flows into the recovery container through the drain pipe. S7. Depending on the size of the mold shell and the wax content, continue dewaxing for 10-20 minutes. First, turn off the ultrasonic generator 10 and the second motor 1151. Then, start the lifting mechanism 8 to raise the mesh base 4 and the mold shell to the operating height. After the surface moisture of the mold shell has been initially drained and the temperature has dropped to room temperature, control the cylinder 121 of the clamping part 12 to retract, so that the clamping plate 122 is removed from the mold shell. Take out the processed mold shell to complete the single dewaxing operation.

[0026] The working principle of this invention is as follows: Clean water is injected through the inlet of the treatment tank 1. The electric heating plates inside the treatment tank 1 and assembly frame 3 are activated to stably control the water temperature at 85-95℃ and maintain it in a heat-preserving state. Then, the first motor 81 of the lifting mechanism 8 is activated, driving the assembly frame 3 and mesh base 4 to rise to the operating height via the worm gear 82, worm wheel 84, lead screw 85, and screw seat 86. The shell to be dewaxed is placed into the mesh base 4. The cylinders 121 on both sides of the mesh base 4 are activated to clamp and fix the shell using the clamping plates 122. Next, the water supply equipment is turned on, and clean water flows through the liquid guide pipe 6 from the nozzle 7. The spray is used to rinse the mold shell surface for 1-2 minutes to remove floating dust and loose wax debris. After rinsing, the first motor 81 is restarted, causing the mesh base 4 to slowly descend and completely immerse the mold shell in the constant-temperature hot water of the treatment tank 1. After the motor is turned off, the second motor 1151 of the ultrasonic generator 10 and the pushing mechanism 11 is started simultaneously. The second motor 1151 drives the eccentric cam 111 to rotate through the small gear 1152 and the large gear 1153, causing the waist-shaped frame 112 and the transmission rod 113 to drive the mesh base 4 and the mold shell to move smoothly back and forth in the hot water. The acoustic transducer 9 converts high-frequency electrical signals into mechanical vibrations, which are then transmitted to the water to create a cavitation effect. During the dewaxing process, the valve of the first drain pipe 13 is opened every 5-8 minutes to recover the upper layer of wax using density differences. After 10-20 minutes, the ultrasonic generator 10 and the second motor 1151 are turned off, and the lifting mechanism 8 is activated to raise the mesh base 4. Once the mold shell has drained and cooled, the control cylinder 121 releases the clamping plate 122, and the processed mold shell is removed, completing a single operation. This dewaxing method, which combines hot water immersion with ultrasonic vibration, replaces the traditional combustion dewaxing method. The local high pressure and impact force generated by the ultrasonic cavitation effect can efficiently peel off the wax layer in the inner wall of the mold shell and in complex cavities and small gaps, greatly improving the thoroughness of dewaxing. At the same time, water treatment can prevent the mold shell from cracking and will not cause environmental pollution due to combustion. The driving mechanism 11 drives the mesh base 4 to reciprocate, which can break the static water layer around the mold shell, so that the high temperature hot water can continuously and fully contact the mold shell, avoiding the local water temperature drop that slows down the melting speed. The flowing water can also carry away the molten wax in time, further improving the dewaxing efficiency and ensuring uniform dewaxing of the mold shell in different positions.

Claims

1. A dewaxing device for removing wax patterns in investment casting, characterized in that, The system includes a processing box 1, a fixed plate 2 fixedly connected to one side of the processing box 1, a lifting mechanism 8 on one side of the fixed plate 2, an assembly frame 3 slidably connected to one side of the fixed plate 2 via the lifting mechanism 8, a pushing mechanism 11 on one side of the assembly frame 3, a mesh base 4 movably connected inside the assembly frame 3 via the pushing mechanism 11, clamping parts 12 on both sides of the mesh base 4, a fixed frame 5 fixedly connected to one side of the fixed plate 2 on the processing box 1, a liquid guide pipe 6 fixedly connected to the top of the fixed frame 5, a nozzle 7 fixedly connected to the bottom of the liquid guide pipe 6, the nozzle 7 being directly above the mesh base 4, an ultrasonic transducer 9 fixedly connected to one side of the interior of the processing box 1, an ultrasonic generator 10 fixedly connected to one side of the ultrasonic transducer 9 on the processing box 1, a first drain pipe 13 fixedly connected to the upper side of one end of the processing box 1, a second drain pipe 14 fixedly connected to the lower side of one end of the processing box 1, and electric heating plates fixedly connected to both sides of the interior of the processing box 1 and the assembly frame 3.

2. The dewaxing device for removing wax patterns in investment casting according to claim 1, characterized in that, The lifting mechanism 8 includes a first motor 81, which is fixedly connected to one side of the top of the fixed plate 2. A shaft bracket 83 is fixedly connected to one side of the top of the fixed plate 2, and the first motor 81 is fixedly connected to the shaft bracket 83. A worm gear 82 is fixedly connected to the output end of the first motor 81. A worm wheel 84 is meshed with one side of the worm gear 82. A lead screw 85 is fixedly connected to one side of the worm wheel 84. The lead screw 85 is rotatably connected inside the fixed plate 2. A screw seat 86 is threadedly connected to the outer surface of the lead screw 85. One side of the screw seat 86 is slidably connected inside the fixed plate 2. Both sides of the screw seat 86 extending out of the fixed plate 2 are fixedly connected to the lifting frame 89. The common end of the two lifting frames 89 is fixedly connected to one side of the assembly frame 3.

3. A dewaxing device for removing wax patterns in investment casting according to claim 2, characterized in that, The fixing plate 2 has a first limiting groove 88 on both sides inside. A first limiting block 87 is slidably connected inside the first limiting groove 88. One side of the first limiting block 87 is fixedly connected to one side of the screw seat 86.

4. A dewaxing device for removing wax patterns in investment casting according to claim 1, characterized in that, The pushing mechanism 11 includes a power component 115, which is located on one side of the assembly frame 3. An eccentric cam 111 is rotatably connected to the inner side of the assembly frame 3 via the power component 115. A waist-shaped frame 112 is movably connected to the outer side of the eccentric cam 111. A transmission rod 113 is fixedly connected to both sides of the waist-shaped frame 112. A transmission plate 114 is fixedly connected to one side of the transmission rod 113. The common side of the two transmission plates 114 is connected to the mesh base 4.

5. A dewaxing device for removing wax patterns in investment casting according to claim 4, characterized in that, A guide frame 116 is fixedly connected to one side of the inside of the assembly frame 3, and one side of the transmission rod 113 is slidably connected to the guide frame 116.

6. A dewaxing device for removing wax patterns in investment casting according to claim 4, characterized in that, The power assembly 115 includes a second motor 1151, which is fixedly connected to the outer side of the assembly frame 3. A pinion 1152 is fixedly connected to the output end of the second motor 1151. A large gear 1153 is meshed with one side of the pinion 1152. A shaft 1154 is fixedly connected to one side of the large gear 1153. One side of the shaft 1154 is fixedly connected to one side of the eccentric cam 111.

7. A dewaxing device for removing wax patterns in investment casting according to claim 4, characterized in that, A guide groove 1141 is provided inside one side of the transmission plate 114. A guide block 1142 is slidably connected inside the guide groove 1141. One end of the guide block 1142 is fixedly connected to one end of the mesh base 4. A spring 1143 is fixedly connected between the guide block 1142 and the guide groove 1141. A guide rod 1144 is fixedly connected to the middle side inside the guide groove 1141. The guide block 1142 is slidably connected to the guide rod 1144.

8. A dewaxing device for removing wax patterns in investment casting according to claim 7, characterized in that, The guide groove 1141 has a second limiting groove 1145 on both sides inside. A second limiting block 1146 is slidably connected inside the second limiting groove 1145. One side of the second limiting block 1146 is fixedly connected to one side of the guide block 1142.

9. A dewaxing device for removing wax patterns in investment casting according to claim 1, characterized in that, The clamping member 12 includes a cylinder 121, which is fixedly connected to both sides of the mesh base 4. The output end of the cylinder 121 is fixedly connected to a clamping plate 122. The clamping plate 122 has mesh holes 123 inside, and there are multiple mesh holes 123.

10. A method for a dewaxing device used to remove wax patterns in investment casting, comprising the following steps: S1. Inject clean water into the tank through the water inlet of the processing tank, start the electric heating plates on both sides inside the processing tank and the assembly frame, set the water temperature to 85-95℃ through the temperature control system to meet the common wax mold melting requirements, and keep the electric heating plates in a low temperature state after the temperature sensor shows that the water temperature is stable within the set range to provide a continuous and stable thermal environment for dewaxing. S2. Start the first motor of the lifting mechanism, which drives the assembly frame and mesh seat to rise to the operating height above the processing box through worm gear and screw seat transmission. Place the mold shell to be dewaxed stably in the center of the mesh seat. Start the clamping cylinders on both sides of the mesh seat. The cylinders push the clamping plates closer to the mold shell until the clamping plates on both sides are tightly attached to the mold shell, so as to firmly fix the mold shell and prevent displacement during subsequent movement. S3. Turn on the external water supply equipment. Clean water is delivered to the nozzle through the liquid guide pipe. The nozzle sprays a uniform water flow onto the mold shell on the mesh base to rinse the surface of the mold shell for 1-2 minutes. The impact force of the water flow is used to initially remove the floating dust and wax residue attached to the surface of the mold shell. S4. Restart the first motor of the lifting mechanism, control the lead screw to rotate in the opposite direction so that the screw seat drives the assembly frame and the mesh seat to slowly descend until the mold shell is completely submerged in the constant temperature hot water of the treatment tank. Turn off the first motor. The self-locking property of the worm gear structure keeps the mesh seat stably in this position. Simultaneously start the second motor of the ultrasonic generator and the push mechanism. The ultrasonic transducer converts the high-frequency electrical signal into mechanical vibration and transmits it to the water to form a cavitation effect. S5. Next, the second motor drives the eccentric cam to rotate through the small gear and large gear reduction transmission, which pushes the waist frame and transmission rod to reciprocate, thereby driving the mesh base and mold shell to move back and forth smoothly in the hot water, continuously contacting the hot water to remove wax. S6. Under the combined effect of ultrasonic cavitation and reciprocating motion of the mold shell, the wax mold inside the mold shell is heated and melted. The melted wax flows out of the mold shell cavity under the disturbance of water flow and gravity, floats to the surface of hot water through the mesh of the mesh seat and clamping plate, and opens the valve of the first drain pipe every 5-8 minutes. Using the density difference between wax and water, the upper pure wax flows into the recovery container through the drain pipe. S7. Depending on the size of the mold shell and the wax content, continue dewaxing for 10-20 minutes. Then, turn off the ultrasonic generator and the second motor, and then start the lifting mechanism to raise the mesh base and the mold shell to the operating height. After the surface moisture of the mold shell has been initially drained and the temperature has dropped to room temperature, control the clamping cylinder to retract, so that the clamping plate is removed from the mold shell. Take out the processed mold shell to complete the single dewaxing operation.

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