A rapid prototyping material mixing device for industrial design

Abstract

The application discloses a kind of industrial design with rapid prototyping material mixing device, including sealed container, transition cabin and injection pipe, suspended mixing assembly is provided in sealed container, electric push rod is fixedly connected in transition cabin, the output end of electric push rod is fixedly connected with driving element, driving element output end is fixedly connected with moving assembly, injection pipe is located at the middle position of sealed container top end, the suspended mixing assembly includes: transducer, electromagnetic coil and reflector, transducer is located at the top end of sealed container, its output direction is vertically downward, electromagnetic coil is fixedly connected to the side of sealed container, reflector is clamped with moving assembly;By array transducer emits ultrasonic wave and reflector forms node, so that material keeps stable suspended state, shear flow is formed by electromagnetic coil, so as to realize no mixing dead angle, overall can realize arbitrary position, continuous printing of multiple droplets, simultaneously easy to disassemble, it is convenient to use, internal inert gas environment keeps stable.

Description

Technical Field

[0001] This invention relates to the field of rapid prototyping technology, specifically to a rapid prototyping material mixing device for industrial design. Background Technology

[0002] Rapid prototyping materials used in industrial design are the mainstream materials for the three major processes of 3D printing, CNC, and vacuum casting. They are mainly divided into five categories: photosensitive resin, thermoplastic plastic, composite material, metal, and silicone. These materials usually contain magnetic particles to ensure that they can be quickly magnetized during use.

[0003] Chinese patent CN210362492U discloses a multi-material fused deposition modeling (FDM) extrusion printing device, including a mixing tank, a fused deposition modeling barrel, and a cylinder body. The mixing tank is located above the fused deposition modeling barrel, and the discharge end of the mixing tank is connected to the inlet end of a connecting pipe, which in turn is connected to the inlet end of the fused deposition modeling barrel. A control valve is installed on the connecting pipe. The inlet end of the fused deposition modeling barrel is located on the top right side of the barrel. The mixing tank has a spherical structure, and multiple sets of feeding pipes are evenly spaced on its top. A mixing device is installed on the mixing tank. The output end of a second motor is connected to an extrusion screw. Guide holes are provided on the side wall of the cylinder body, guide vanes are installed inside the cylinder body, and a nozzle is installed at the bottom of the cylinder body. The nozzle has spray holes, and a spiral channel communicates with the spray holes. This invention can uniformly mix multiple materials and print composite material products.

[0004] However, the aforementioned patent uses mechanical stirring components to directly contact the mixing materials. This not only makes it easy for material residues to be generated on the surface of the stirring blades, leading to cross-contamination during material changes, but also makes it easy to create mixing dead zones when mixing some high-viscosity materials, making it impossible to achieve uniform dispersion and mixing. Summary of the Invention

[0005] The purpose of this invention is to provide a rapid prototyping material mixing device for industrial design, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rapid prototyping material mixing device for industrial design, comprising a sealed container, a transition chamber and an injection tube, wherein a suspended mixing component is disposed inside the sealed container, an electric push rod is fixedly connected inside the transition chamber, a driving component is fixedly connected to the output end of the electric push rod, a moving component is fixedly connected to the output end of the driving component, and the injection tube is located at the middle position of the top of the sealed container. The suspended hybrid assembly includes a transducer, an electromagnetic coil, and a reflector. The transducer is located at the top of the sealed container and its output direction is vertically downward. The electromagnetic coil is fixedly connected to the side of the sealed container, and the reflector is snapped into the moving assembly.

[0007] Preferably, the injection tube passes through the top of the sealed container and is sealed and fixedly connected to it. One end of the injection tube located inside the sealed container is fixedly connected to a piezoelectric nozzle, and several injection pumps are fixedly connected inside the injection tube.

[0008] Preferably, a number of electromagnetic coils are fixedly connected to the side of the sealed container, a number of arrayed transducers are fixedly connected to the top of the inner wall of the sealed container, an isolation component is fixedly connected to the bottom of the sealed container, the isolation component and the sealed container are both fixedly connected to the transition chamber, a sealed door is hinged to the surface of the transition chamber, and an air exchange valve is fixedly connected inside the transition chamber.

[0009] Preferably, the isolation assembly includes: a base plate and two sealing plates. The base plate is fixedly connected to the inner wall of the transition chamber. A sliding groove is provided in the base plate. Two sealing plates are symmetrically arranged in the sliding groove. A guide rod is slidably connected to one end of the two sealing plates, and a lead screw is threadedly connected to the other end. The guide rod is fixedly connected to the base plate, and the lead screw is rotatably connected to the base plate.

[0010] Preferably, a temperature control plate is fixedly connected inside the reflector, a slot is provided in the middle of the bottom surface of the reflector, a slot is provided on the side of the reflector, the upper surface of the reflector is smooth and slightly concave, and the reflector as a whole is parallel to the transducer array surface.

[0011] Preferably, the sealed container is provided with a monitoring module, which includes a high-speed industrial camera, a backlight, and sensors. The high-speed industrial camera is fixedly connected to the lower part of the side wall of the inner wall of the sealed container, and the backlight is fixedly connected to the lower part of the side wall of the inner wall of the sealed container. The backlight and the high-speed industrial camera are on the same horizontal plane and are positioned opposite each other. Several sensors are provided, and the sensors are respectively set in the sealed container and the transition chamber.

[0012] Preferably, the moving component includes: a ring platform and an adjusting chamber. The ring platform has four sliding grooves and a guide groove. A clamp is slidably connected in the sliding groove. Both the sliding groove and the clamp are arc-shaped. The inner arc surface of the clamp engages with the slot. The bottom of the clamp passes through the guide groove and is hinged to a connecting rod. The other ends of the four connecting rods are hinged to the same connecting sleeve.

[0013] Preferably, a motor is fixedly connected to the bottom of the inner wall of the ring platform, and a lead screw is fixedly connected to the output end of the motor. The other end of the lead screw passes through the ring platform and is rotatably connected to an electrode disk. The electrode disk is inserted into a slot, and a guide cylinder is fixedly connected to the bottom surface of the electrode disk. The guide cylinder is slidably connected to the ring platform, and the lead screw is slidably connected to the ring platform. A connecting sleeve is fitted onto the surface of the lead screw and threadedly connected to it. A guide rod is fixedly connected to the upper surface of the connecting sleeve. The other end of the guide rod is slidably connected to the inner wall of the guide cylinder. A spring is fixedly connected inside the guide cylinder, and the other end of the spring is fixedly connected to the guide rod.

[0014] Preferably, the regulating chamber is provided with a limit rod and a lead screw three. The lead screw three is rotatably connected to the regulating chamber, and the limit rod is fixedly connected to the regulating chamber. Sliding sleeves are fitted onto the surfaces of both the lead screw three and the limit rod. The sliding sleeves are threadedly connected to the lead screw three. Both sliding sleeves are fixedly connected to the bottom end of the ring platform. In the initial state, the sliding sleeves are located at the middle position of the lead screw three, and the bottom surface of the ring platform is slidably connected to the regulating chamber.

[0015] Preferably, the length of the lead screw is greater than the diameter of the reflector, and in the initial state, the vertical projection of the adjustment chamber coincides with the vertical projection of the ring platform.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. Ultrasonic waves are emitted by an array transducer and formed into stable nodes in a sealed container by the reflection of the reflector, thereby keeping the material droplets in a stable suspended state in the standing wave sound field. The rotating magnetic field formed by the electromagnetic coil drives the magnetic particles inside the droplets to move, thereby forming a shear flow, thereby achieving uniform mixing of high viscosity materials and achieving no mixing dead zones. 2. By solidifying droplets onto the reflector, a separate mixing chamber is no longer needed. At the same time, the reflector can be moved horizontally by a moving component, enabling continuous printing of multiple droplets at any position. The reflector is easy to disassemble and assemble, making the whole system convenient to use. During disassembly and assembly, the transition chamber ensures that the inert gas environment inside the sealed container remains stable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall internal structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the sealed container of the present invention; Figure 4 This is a schematic diagram of the internal structure of the injection tube of the present invention; Figure 5 This is a schematic diagram of the temperature control plate structure of the present invention; Figure 6 This is a schematic diagram of the reflector structure of the present invention; Figure 7 This is a schematic diagram of the fixture structure of the present invention; Figure 8 This is a schematic diagram of the internal structure of the transition chamber of the present invention; Figure 9 This is a schematic diagram of the connecting cylinder structure of the present invention; Figure 10 This is a schematic diagram of the internal structure of the guide cylinder of the present invention.

[0018] In the diagram: 1. Sealed container; 2. Suspended mixing assembly; 21. Transducer; 22. Electromagnetic coil; 23. Reflector; 24. Temperature control plate; 25. Slot; 26. Gap; 3. Monitoring module; 31. High-speed industrial camera; 32. Backlight panel; 33. Sensor; 4. Injection tube; 41. Piezoelectric nozzle; 42. Injection pump; 5. Transition chamber; 6. Isolation assembly; 61. Base plate; 62. Slide 1; 63. Sealing plate; 64. Guide rod 1; 65. Lead screw 1; 7. Sealing... 8. Sealing door; 9. Electric push rod; 10. Drive unit; 11. Moving assembly; 101. Ring platform; 102. Slide groove II; 103. Clamp; 104. Guide groove; 105. Connecting rod; 106. Connecting sleeve; 107. Guide rod II; 108. Guide cylinder; 109. Spring; 1010. Electrode plate; 1011. Lead screw II; 1012. Motor; 1013. Adjustment chamber; 1014. Limit rod; 1015. Lead screw III; 1016. Slide sleeve; 11. Air exchange valve. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-10 The present invention provides a technical solution: Example 1 A rapid prototyping material mixing device for industrial design includes a sealed container 1, a transition chamber 5, and an injection tube 4. The sealed container 1 is a cylindrical sealed container made of high-strength, corrosion-resistant material, which effectively isolates external dust and moisture to prevent contamination of the mixed materials. An observation window is provided on the surface of the sealed container 1 to facilitate observation of the internal mixing process. A sliding light shield is also provided on the outer surface of the observation window to prevent external light from interfering with the internal material mixing. A suspension mixing component 2 is installed inside the sealed container 1, which supports and mixes various droplets injected into the sealed container 1. The transition chamber 5 is located below the sealed container 1. It is coaxially distributed with the sealed container 1. An electric push rod 8 is fixedly connected inside the transition chamber 5. The electric push rod 8 is a servo electric push rod 8, which has high adjustment accuracy and stable thrust, thus facilitating control. A drive component 9 is fixedly connected to the output end of the electric push rod 8. The drive component 9 is an integrated power transmission structure, which can drive the moving component 10 to rotate. The moving component 10 is fixedly connected to the output end of the drive component 9. At this time, the moving component 10 and the drive component 9 can be moved along the Z-axis by the electric push rod 8, and the moving component 10 can be rotated by the drive component 9. The injection tube 4 is located at the middle position of the top of the sealed container 1. The injection tube 4 can be used to inject various rapid prototyping materials into the sealed container 1.

[0021] An isolation component 6 is fixedly connected to the bottom of the sealed container 1. The isolation component 6 can isolate and seal the sealed container 1 from the transition chamber 5, thereby preventing the inert gas environment inside the sealed container 1 from being damaged when the mixed material is taken out. Both the isolation component 6 and the sealed container 1 are fixedly connected to the transition chamber 5. A sealing door 7 is hinged to the surface of the transition chamber 5. The sealing door 7 adopts a sealing and locking structure. Opening it makes it easy to take out the reflector 23 and the material on its surface. A ventilation valve 11 is fixedly connected inside the transition chamber 5. When the reflector 23 is taken out each time and remixing is required, the environment inside the transition chamber 5 can be adjusted through the ventilation valve 11 to form the same inert gas environment as inside the sealed container 1, thereby avoiding changes in the internal environment when remixing.

[0022] The isolation assembly 6 includes a base plate 61 and two sealing plates 63. The base plate 61 is a plate-shaped structure and is fixedly connected to the inner wall of the transition chamber 5, with a sealed connection. A sliding groove 62 is provided inside the base plate 61. The sliding groove 62 is a square groove, and a through hole is provided on the surface of the base plate 61. The diameter of the hole is slightly larger than the diameter of the annular platform 101, thereby facilitating the up-and-down movement of the annular platform 101. Two sealing plates 63 are symmetrically arranged inside the sliding groove 62. When the two sealing plates 63 are combined, they can completely cover the central through hole of the base plate 61. This achieves sealing and isolation. One end of each of the two sealing plates 63 is slidably connected to a guide rod 64, which guides the sealing plate 63 to slide along the groove 62 to prevent displacement. The other end of the sealing plate 63 is threadedly connected to a lead screw 65, with the threads at both ends of the lead screw 65 rotating in opposite directions. When rotated, the two sealing plates 63 can move closer or further away synchronously. The guide rod 64 is fixedly connected to the base plate 61, and one end of the lead screw 65 is rotatably connected to the base plate 61, while the other end is fixedly connected to the drive structure installed inside the base plate 61.

[0023] A temperature control plate 24 is fixedly connected inside the reflector plate 23. The temperature control plate 24 is an electrically heated temperature control structure that can adjust the temperature of the reflector plate 23 according to the curing characteristics of the mixed material. A slot 26 is provided in the middle of the bottom surface of the reflector plate 23. The slot 26 is used to insert with the electrode disk 1010 of the moving component 10 to realize power transmission and preliminary positioning. A slot 25 is provided on the side of the reflector plate 23. The slot 25 is an arc-shaped groove to fit the clamp 103 of the moving component 10, thereby fixing the reflector plate 23. The upper surface of the reflector plate 23 is smooth and slightly concave. The slightly concave structure can focus the ultrasonic waves after reflection on the central area of ​​the sealed container 1, thereby improving the suspension effect of the droplets. The reflector plate 23 is parallel to the array surface of the transducer 21 to ensure uniform ultrasonic wave reflection without any dead angles.

[0024] A monitoring module 3 is installed inside the sealed container 1. This module is used to monitor the mixing state of the mixed materials in real time, providing data support for the control of the mixing process. The monitoring module 3 includes a high-speed industrial camera 31, a backlight panel 32, and a sensor 33. The high-speed industrial camera 31 is fixedly connected to the lower part of the side wall of the inner wall of the sealed container 1. The high-speed industrial camera 31 can capture the state of the mixed materials in real time, including material agglomeration, dispersion, and mixing. It can also be used for droplet positioning. The backlight panel 32 is fixedly connected to the lower part of the side wall of the inner wall of the sealed container 1. The backlight panel 32 is a dual-wavelength composite backlight panel 32, with two types of LED chips arranged alternately inside, used for illumination and droplet curing respectively. Some rapid prototyping materials can be rapidly cured by changing the temperature, while some rapid prototyping materials, such as photosensitive resins... For rapid prototyping materials like grease, the lighting needs to be changed. Curing can only be achieved by irradiating the material with light of a specified wavelength. By controlling the on and off of two types of lights separately, both curing and illumination functions can be accomplished using a single backlight panel 32. The backlight panel 32 and the high-speed industrial camera 31 are on the same horizontal plane and positioned opposite each other. The backlight panel 32 can provide uniform backlighting, which facilitates clear shooting by the high-speed industrial camera 31. Several sensors 33 are provided, including an oxygen sensor 33, a pressure sensor 33, and a stability sensor 33. The oxygen sensor 33 and the pressure sensor 33 are used to monitor the inert gas environment in the sealed container 1 and the transition chamber 5. The temperature sensor 33 is used to monitor the temperature of the reflector 23. Several sensors 33 are respectively set in the sealed container 1 and the transition chamber 5 to achieve overall monitoring.

[0025] The moving component 10 includes a ring platform 101 and an adjusting chamber 1013. The ring platform 101 is a ring structure and can be used to fix the reflector 23. In the initial state, it is coaxially distributed with the sealed container 1. The ring platform 101 has four sliding grooves 102 and a guide groove 104. The four sliding grooves 102 are evenly distributed around the circumference of the ring platform 101 and are interconnected. A clamp 103 is slidably connected in the sliding grooves 102. Both the sliding grooves 102 and the clamp 103 are arc-shaped, and the arc-shaped structure can accurately fit the arc-shaped side of the reflector 23. When the clamp 103 is closed, the inner arc surface of the clamp 103 engages with the slot 25, which can fix the reflector 23 and prevent the reflector 23 from falling off or shifting during the movement. The bottom of the clamp 103 passes through the guide groove 104 and is hinged to the connecting rod 105. The connecting rod 105 can transmit power to drive the clamp 103 to slide along the slide groove 102. The other end of the four connecting rods 105 is hinged to the same connecting sleeve 106. When the connecting sleeve 106 moves up and down, it can drive the four connecting rods 105 to move synchronously, thereby realizing the synchronous opening and closing of the four clamps 103.

[0026] A motor 1012 is fixedly connected to the bottom of the inner wall of the ring platform 101. A lead screw 1011 is fixedly connected to the output end of the motor 1012. The other end of the lead screw 1011 passes through the ring platform 101 and is rotatably connected to an electrode disk 1010. The electrode disk 1010 can transmit power to the temperature control plate 24 of the reflector 23. The electrode disk 1010 is inserted into the slot 26. An electrode plate is provided in the middle of the electrode disk 1010. When the two are inserted, stable power transmission and initial positioning of the reflector 23 can be achieved. A guide cylinder 108 is fixedly connected to the bottom surface of the electrode disk 1010. The guide cylinder 108 can guide the electrode disk 1010 to rise and fall smoothly, thereby avoiding deviation. The guide cylinder 108 is slidably connected to the ring platform 101. The lead screw 1011 is slidably connected to the ring platform 101. The connecting sleeve 106 is sleeved on the surface of the lead screw 1011 and threadedly connected to it. When the lead screw 1011... When rotated, the connecting sleeve 106 can be driven to move axially along the lead screw 1011. The upper surface of the connecting sleeve 106 is fixedly connected to the guide rod 107. The guide rod 107 can enhance the stability of the movement of the connecting sleeve 106. The other end of the guide rod 107 is slidably connected to the inner wall of the guide cylinder 108. The guide cylinder 108 is fixedly connected to the spring 109. The other end of the spring 109 is fixedly connected to the guide rod 107. When the connecting sleeve 106 slides upward, the spring 109 is compressed. At this time, the electrode disk 1010 is stationary but is pushed upward. At the same time, the connecting rod 105 will drive the clamp 103 to slide outward, thereby causing the clamp 103 to disengage from the reflector 23. At this time, the spring 109 pushes the electrode disk 1010 upward through the guide cylinder 108, thereby pushing out the reflector 23, so as to facilitate the removal of the reflector 23 and the material on its surface.

[0027] The adjusting chamber 1013 is a square sealed structure. The horizontal position of the ring platform 101 can be adjusted through the adjusting chamber 1013, thereby changing the position of the reflector 23. A limit rod 1014 and a lead screw 1015 are installed inside the adjusting chamber 1013. The limit rod 1014 is a cylindrical guide structure that guides the sliding sleeve 1016 to slide smoothly. The lead screw 1015 is rotatably connected to the adjusting chamber 1013, and one end of the lead screw 1015 is fixedly connected to a pre-set drive structure inside the adjusting chamber 1013. The limit rod 1014 is fixedly connected to the adjusting chamber 1013. Sliding sleeves 1016 are fitted onto the surfaces of both the lead screw 1015 and the limit rod 1014. The sliding sleeves 1016 are threadedly connected to the lead screw 1015. When the lead screw 1015 rotates, it can drive the sliding sleeve 1016 along the limit rod 1014. 4. Sliding: Both sliding sleeves 1016 are fixedly connected to the bottom end of the ring platform 101, thereby driving the ring platform 101 to move horizontally synchronously. In the initial state, the sliding sleeve 1016 is located in the middle position of the lead screw 1015, thus ensuring that the ring platform 101 is initially centered. The bottom surface of the ring platform 101 is slidably connected to the adjusting chamber 1013. A wear-resistant bushing is provided at the sliding connection. The length of the lead screw 1015 is greater than the diameter of the reflector 23, thus ensuring that the reflector 23 has sufficient travel when the ring platform 101 moves, so that the droplets can be dropped at any position on the reflective surface. In the initial state, the vertical projection of the adjusting chamber 1013 coincides with the vertical projection of the ring platform 101, thus avoiding collision damage caused by the adjusting chamber 1013 protruding during the process of the ring platform 101 moving into the transition chamber 5.

[0028] Example 2 In this embodiment, the ambient temperature is maintained at 25±2℃, and the sealed container 1 is filled with nitrogen (99.99% purity). The ultrasonic frequency is adjusted to a fixed 40 kHz. The micro-concave surface of the reflector 23 can be set to a radius of curvature of 50 mm. Its surface is smooth. The volume of each material droplet is preset to 10 μL. Experimental data is recorded at 600-second intervals. When the droplet drifts ≤ ±50 μm vertically at the node position, it is considered stable.

[0029] The suspension mixing component 2 includes a transducer 21, an electromagnetic coil 22, and a reflector 23. The transducer 21 outputs vertically downwards. The electromagnetic coil 22 is fixedly connected to the side of the sealed container 1. The reflector 23 is engaged with the moving component 10. When the moving component 10 moves vertically, the reflector 23 also moves accordingly. The injection tube 4 passes through the top of the sealed container 1 and is fixedly connected to it. The connection between the two is sealed with high-temperature resistant sealant to prevent material leakage or the entry of external gases during the mixing process. The sealed container 1 is filled with inert gas to prevent other gases from entering. To prevent interference with mixing, a piezoelectric nozzle 41 is fixedly connected to one end of the injection tube 4 inside the sealed container 1. The piezoelectric nozzle 41 enables precise spraying of materials, ensuring uniform contact of multiple materials. The output direction of the piezoelectric nozzle 41 is vertically downward. Several injection pumps 42 are fixedly connected inside the injection tube 4, each corresponding to a different material. This facilitates the spraying of different materials at the same location and subsequent mixing. The injection pumps 42 are metering pumps, controlled by components such as the processor within the device, which precisely control the injection volume of each material to ensure accurate mixing ratios.

[0030] The sealed container 1 has several arrayed transducers 21 fixedly connected to its top. The transducers 21 are ultrasonic transducers. The array distribution allows the ultrasonic waves emitted by the transducers 21 to act evenly on the entire area inside the sealed container 1, avoiding dead corners. The injection tube 4 is located in the middle of the array of transducers 21. When the transducers 21 are activated, ultrasonic waves are emitted to form emitted waves. The emitted waves come into contact with the surface of the reflector plate 23 and are reflected to form reflected waves. The reflected waves and emitted waves meet and interfere inside the sealed container 1 to form standing waves. The node positions in the standing waves will form stable equilibrium points. When the droplet falls to the equilibrium point, it will be constrained and supported, thus fixing and suspending at this node position.

[0031] Table 1 shows that the device can achieve stable levitation of five rapid prototyping materials with viscosities ranging from 600 to 3500 mPa·s for over 600 seconds at an ultrasonic frequency of 40 kHz, with no sedimentation observed in any of the materials. Among them, the high-viscosity silicone (3500 mPa·s) had a levitation height of 4.2 mm, indicating that the micro-concave reflector 23 design effectively enhanced the levitation capability, verifying the universality of ultrasonic standing wave levitation technology for materials of different viscosities.

[0032] Table 1 Example 3 In this embodiment, the magnetic field strength can be adjusted for different materials. The strength is set to 0.15 T for photosensitive resin, 0.12 T for composite materials, and 0.20 T for high-viscosity silicone. The number of electromagnetic coils 22 is uniformly set to 4, and they are arranged around the side of the sealed container 1. During the experiment, the switching frequency of the current direction is set to two groups: a switching group of 10 Hz and a constant direction group of 0 Hz. The volume of the material droplets is consistently 50 μL each time. The mixing degree is determined by analyzing and calculating the gray standard deviation and comparing it with the completely uniform state. During the experiment, the control group uses traditional mechanical stirring with a blade speed of 300 rpm.

[0033] The sealed container 1 has several sets of electromagnetic coils 22 fixedly connected to its side. Since the rapid prototyping material often contains magnetic raw materials in order to ensure that the printed parts are uniform in performance and can be effectively magnetized, some non-magnetic raw materials can have magnetic tracer particles added to the body cavity before use. When the electromagnetic coils 22 are energized in sequence, a rotating magnetic field is generated in the sealed container 1. The rotating magnetic field drives the magnetic particles or magnetic tracer particles in the magnetic raw materials to rotate continuously through magnetic force. At this time, the magnetic particles drive the surrounding liquid to form an internal shear flow, thereby driving the droplets to flow and rotate as a whole, so as to achieve rapid mixing of various rapid prototyping materials. At the same time, when the current direction is quickly switched, the magnetic particles can also move back and forth quickly, thereby completing fine mixing. Electromagnetic stirring is superior to traditional mechanical stirring in the test.

[0034] The experimental data in Table 2 show that the electromagnetic field-driven mixing effect of this device is significantly better than that of traditional mechanical stirring. The photosensitive resin can achieve 98.5% uniformity within 30 seconds, while mechanical stirring only achieves 72.3% after 60 seconds. For high-viscosity silicone, with the help of current direction switching (10 Hz), 98.2% uniformity can be achieved within 45 seconds, while only 86.5% is achieved without oscillation. Mechanical stirring still has a mixing dead zone (68.4%) after 90 seconds. This proves that the rotating magnetic field shear flow and oscillation effect can effectively eliminate the mixing dead zone, and is particularly suitable for high-viscosity materials.

[0035]

[0036] Table 2 Example 4 In this embodiment, the device injects various rapid prototyping materials into the sealed container 1 according to a preset ratio through multiple injection pumps 42 inside the injection tube 4. Each injection pump 42 corresponds to one material. The end of the injection tube 4 away from the piezoelectric nozzle 41 is connected to the rapid prototyping material storage device. The piezoelectric nozzle 41 can spray the material evenly, avoiding droplet agglomeration. During this process, the suspension mixing component 2 is activated. At this time, the transducer 21 emits high-frequency ultrasonic waves. After being reflected by the reflective surface, the emitted wave and the reflected wave of the transducer 21 form a stable node. When the droplets come into contact with the node, they are fixed there, thereby achieving the suspension of the mixed material droplets. At the same time, the electromagnetic coil 22 generates a uniform annular magnetic field after being energized, which causes the magnetic particles in the mixed material to start rotating, thereby driving the droplets to rotate and mix as a whole. Throughout the process, the backlight panel 32 activates the illumination LED chip, and the high-speed industrial camera 31 continuously monitors the droplet mixing state. When the mixing is completed, the temperature control plate 24 inside the reflector 23 is activated and adjusted to the preset temperature. When the backlight panel 32 starts curing the LED chip, the transducer 21 reduces its power. At this time, the droplet lowers and contacts the surface of the reflector 23. Under the combined action of its surface temperature and curing light, the droplet quickly solidifies. At this time, the moving component 10 is activated. During this process, the drive component 9 drives the ring stage 101 to rotate. At the same time, when the lead screw 1015 rotates, it drives the sliding sleeve 1016 to slide along the limit rod 1014. At this time, the ring stage 101 starts to rotate during the lateral movement, thereby adjusting the position for collecting the next droplet. Since the first droplet has solidified, it becomes a tiny protrusion on the surface of the reflector 23. Since the size of the protrusion is much smaller than the ultrasonic wavelength, its disturbance to the standing wave sound field is limited. At this time, the control system uses the surface topography data of the reflector 23 collected by the high-speed industrial camera 31 and the phase compensation algorithm of the phased array transducer 21 to reconstruct the standing wave node at the preset landing point of the second droplet, so that the second droplet can be stably suspended at the node. Then the injection tube 4 sprays the droplet for the second time and starts repeating the operation.

[0037] Once the materials are fully mixed and the operation is complete, the entire assembly is reset. At this point, the electric push rod 8 drives the ring platform 101 to descend into the transition chamber 5. Subsequently, the two sealing plates 63 merge and seal, isolating the transition chamber 5 from the sealed container 1. At this time, the sealed chamber door 7 is opened and the motor 1012 is started. The motor 1012 drives the lead screw 1011 to rotate, causing the connecting sleeve 106 to move upward and causing the clamp 103 to disengage from the reflector plate 23. The reflector plate 23 is pushed out by the electrode plate 1010, making it easy for the staff to pick up. When it is necessary to reprint the time, the reflector plate 23 needs to be reinstalled. During installation, the reflector plate 23 is fixed by the clamp 103, and the electrode plate 1010 is used to energize the reflector plate 23. After installation, the sealed chamber door 7 is closed, the ventilation valve 11 is started, and the environment inside the transition chamber 5 is monitored by the sensor 33 until it is consistent with the environment inside the sealed container 1. Then, the sealing plate 63 can be opened, and the reflector plate 23 will be reset by the electric push rod 8.

[0038] In practical use, ultrasonic waves are emitted through the transducer 21 of the array. These waves are reflected upon contact with the reflector 23, and the reflected wave then contacts the emitted ultrasonic wave, forming a stable node inside the sealed container 1. Material droplets are then injected, and as they fall, they contact the node, where they are supported and stabilized. The electromagnetic coil 22 is then energized to create a rotating magnetic field. This field attracts magnetic particles in the material droplets, causing them to rotate and creating a shear flow within the droplets, thus mixing them. For materials without magnetic particles, magnetic tracer particles can be added beforehand to allow for rotational mixing. During mixing, for some high-viscosity material droplets, the direction of the current in the electromagnetic coil 22 can be frequently changed, causing the magnetic particles to... The droplets move back and forth repeatedly, improving the mixing effect through oscillation, thus enabling even high-viscosity droplets to mix quickly and uniformly. After mixing, the temperature of the reflector 23 surface and the light on the backlight 32 surface are adjusted to allow the material droplets to solidify rapidly. Then, the power of the transducer 21 is reduced and the droplets are collected on the reflector 23. After collection, the reflector 23 is moved to align with the collection position of the next droplet. The shape and position of the solidified droplet are then captured and identified by a high-speed industrial camera 31, while the position of the reflector 23 is recorded. The phase of the array transducer 21 is then recalculated to create a temperature node inside the sealed container 1 before the second droplet falls. The second material droplet is then captured, mixed, solidified, and collected. This process is repeated until collection is complete, at which point the droplet is removed through the transition chamber 5. This method is suitable for mixing various rapid prototyping materials.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid prototyping material mixing device for industrial design, characterized in that: It includes a sealed container (1), a transition chamber (5) and an injection tube (4). The sealed container (1) is equipped with a suspension mixing component (2). An electric push rod (8) is fixedly connected in the transition chamber (5). A drive component (9) is fixedly connected to the output end of the electric push rod (8). A moving component (10) is fixedly connected to the output end of the drive component (9). The injection tube (4) is located at the middle position at the top of the sealed container (1). The suspended mixing component (2) includes a transducer (21), an electromagnetic coil (22) and a reflector (23). The transducer (21) is located at the top of the sealed container (1) and its output direction is vertically downward. The electromagnetic coil (22) is fixedly connected to the side of the sealed container (1). The reflector (23) is engaged with the moving component (10).

2. The rapid prototyping material mixing device for industrial design according to claim 1, characterized in that: The injection tube (4) passes through the top of the sealed container (1) and is sealed and fixedly connected to it. One end of the injection tube (4) located inside the sealed container (1) is fixedly connected to a piezoelectric nozzle (41). Several injection pumps (42) are fixedly connected inside the injection tube (4).

3. The rapid prototyping material mixing device for industrial design according to claim 1, characterized in that: The sealed container (1) is fixedly connected to several sets of electromagnetic coils (22) on its side. The sealed container (1) is fixedly connected to several arrayed transducers (21) at the top of its inner wall. The sealed container (1) is fixedly connected to an isolation component (6). The isolation component (6) and the sealed container (1) are both fixedly connected to the transition chamber (5). The surface of the transition chamber (5) is sealed with a door (7). The transition chamber (5) is fixedly connected to an air exchange valve (11).

4. The rapid prototyping material mixing device for industrial design according to claim 3, characterized in that: The isolation assembly (6) includes: a base plate (61) and two sealing plates (63). The base plate (61) is fixedly connected to the inner wall of the transition chamber (5). A sliding groove (62) is provided in the base plate (61). Two sealing plates (63) are symmetrically arranged in the sliding groove (62). One end of the two sealing plates (63) is slidably connected to a guide rod (64), and the other end is threadedly connected to a screw rod (65). The guide rod (64) is fixedly connected to the base plate (61), and the screw rod (65) is rotatably connected to the base plate (61).

5. The rapid prototyping material mixing device for industrial design according to claim 1, characterized in that: A temperature control plate (24) is fixedly connected inside the reflector (23). A slot (26) is provided in the middle of the bottom surface of the reflector (23). A slot (25) is provided on the side of the reflector (23). The upper surface of the reflector (23) is smooth and slightly concave. The reflector (23) is parallel to the array surface of the transducer (21).

6. The rapid prototyping material mixing device for industrial design according to claim 1, characterized in that: The sealed container (1) is equipped with a monitoring module (3), which includes a high-speed industrial camera (31), a backlight plate (32) and a sensor (33). The high-speed industrial camera (31) is fixedly connected to the lower part of the side wall of the inner wall of the sealed container (1), and the backlight plate (32) is fixedly connected to the lower part of the side wall of the inner wall of the sealed container (1). The backlight plate (32) and the high-speed industrial camera (31) are on the same horizontal plane and are opposite to each other. There are several sensors (33), and several sensors (33) are respectively set in the sealed container (1) and the transition chamber (5).

7. The rapid prototyping material mixing device for industrial design according to claim 1, characterized in that: The moving component (10) includes: a ring platform (101) and an adjustment chamber (1013). The ring platform (101) has four sliding grooves (102) and a guide groove (104). A clamp (103) is slidably connected in the sliding groove (102). The sliding groove (102) and the clamp (103) are both arc-shaped. The inner arc surface of the clamp (103) is engaged with the slot (25). The bottom of the clamp (103) passes through the guide groove (104) and is hinged with a connecting rod (105). The other end of the four connecting rods (105) is hinged to the same connecting sleeve (106).

8. The rapid prototyping material mixing device for industrial design according to claim 7, characterized in that: A motor (1012) is fixedly connected to the bottom of the inner wall of the ring platform (101). A lead screw (1011) is fixedly connected to the output end of the motor (1012). The other end of the lead screw (1011) passes through the ring platform (101) and is rotatably connected to an electrode disk (1010). The electrode disk (1010) is inserted into a slot (26). A guide cylinder (108) is fixedly connected to the bottom surface of the electrode disk (1010). The guide cylinder (108) is slidably connected to the ring platform (101). The second lead screw (1011) is slidably connected to the ring platform (101). The connecting sleeve (106) is sleeved on the surface of the second lead screw (1011) and threadedly connected to it. The upper surface of the connecting sleeve (106) is fixedly connected to the second guide rod (107). The other end of the second guide rod (107) is slidably connected to the inner wall of the guide cylinder (108). The guide cylinder (108) is fixedly connected to the inside of the spring (109). The other end of the spring (109) is fixedly connected to the second guide rod (107).

9. The rapid prototyping material mixing device for industrial design according to claim 7, characterized in that: The regulating chamber (1013) is provided with a limiting rod (1014) and a lead screw (1015). The lead screw (1015) is rotatably connected to the regulating chamber (1013), and the limiting rod (1014) is fixedly connected to the regulating chamber (1013). Sliding sleeves (1016) are sleeved on the surfaces of the lead screw (1015) and the limiting rod (1014). The sliding sleeves (1016) are threadedly connected to the lead screw (1015). Both sliding sleeves (1016) are fixedly connected to the bottom end of the ring platform (101). In the initial state, the sliding sleeves (1016) are located in the middle position of the lead screw (1015), and the bottom surface of the ring platform (101) is slidably connected to the regulating chamber (1013).

10. The rapid prototyping material mixing device for industrial design according to claim 9, characterized in that: The length of the lead screw (1015) is greater than the diameter of the reflector (23), and in the initial state, the vertical projection of the regulating chamber (1013) coincides with the vertical projection of the ring platform (101).

Images