BE1030522A1 - MULTI-MATERIAL ADDITIVE MANUFACTURING DEVICE FOR LARGE-FORMAT PRECISE MOLDING - Google Patents

Abstract

A multi-material additive manufacturing device for large-format precise molding aims to solve the problem that a huge-sized printer is needed to print a large-format part, and the printing time is long. A laser, a mounting plate and a printing platform are arranged horizontally from top to bottom. The rotation mechanism is hinged with the column, which is fixedly connected to the work box body. Microdroplet generators are arranged between the mounting plate and the printing platform. A brewing hole is located inside the mounting plate.

Description

MULTI-MATERIAL ADDITIVE MANUFACTURING DEVICE FOR

LARGE FORMAT PRECISE MOLDING

TECHNICAL AREA

The invention belongs to the field of 3D printing, and in particular relates to a multi-material additive manufacturing device for large format precise molding.

STATE OF THE ART

3D printing (3DP) is a kind of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses digital model files as a basis and constructs objects with resin, gel, metal, etc. 3D printing technology surpasses the traditional cutting processing process. It is a rapidly growing processing method, which significantly increases material utilization rate, material precision and manufacturing controllability. It is a revolutionary manufacturing technology that subverts traditional manufacturing processes. This technology has been well applied in many fields such as industrial modeling, packaging, manufacturing, architecture, art, medicine, aviation, aerospace, film, etc. Currently, microdroplet 3D printing uses a single point feed and prints from a print head to a line and surface. This printing method is inefficient and takes too long to print large objects, which limits the use of 3D printing in practical application. In recent years, printing with multiple heads printing at the same time has been invented. However, this method will make the printer too large and complex. Because a printer cannot contain many printhead components. For huge size printers, this solution still takes a long time to complete the printing task.

CONTENT OF THE INVENTION

The present invention provides a multi-material additive manufacturing device for large-format precise molding to solve the problem that current technology requires a large-size printer and the printing time is long to print large-format parts.

The technical solution that the present invention adopts to solve the problem mentioned above is as follows:

A multi-material additive manufacturing device for large-format precision molding, the components of which include a workbox body, a lifting mechanism, a printing platform, a rotating mechanism, a laser, a mounting arm, a column, raw material box, buffer bottle, mounting plate, microdroplet generators, feeding tubes, infusion tube and tubing; the laser, the mounting plate and the printing platform are arranged horizontally from top to bottom, the laser is installed at the bottom of the disassembly arm, which is fixedly connected to the column, the mounting plate is installed on the bottom of the mechanism rotation, the rotation mechanism is hinged with the column, which is fixedly connected to the work box body, the printing platform is installed on the lifting rod of the lifting mechanism, the lifting mechanism is installed at the inside the workbox body, the microdroplet generators are provided between the mounting plate and the printing platform, an infusion hole is provided in the middle of the mounting plate, the microdroplet generators communicate with the infusion hole infusion through the feeding tubes, one end of the infusion tube communicates with the infusion hole, and the other end of the infusion tube communicates with the buffer bottle, which communicates with the infusion box raw material through piping.

Preferably, the microdroplet generators include a support plate, four support rods, a plurality of needle tubes and a plurality of solenoid valves, a plurality of needle tube mounting holes are provided on the support plate, the plurality of needle tube mounting holes needle are arranged in an array, the plurality of needle tubes correspond to the plurality of needle tube mounting holes one by one, the needle tubes are arranged in the middle of the needle tube mounting holes, the plurality of solenoid valves correspond to the plurality of needle tube mounting holes one by one several needle tubes, the solenoid valves are installed on the needle tubes and sleeve the needle tubes, the solenoid valves are electrically connected with the computer controller, the support plate is welded to the mounting plate through the support rods, and the four support rods are respectively arranged on the four corners of the bottom of the mounting plate.

Preferably, the diameter of the needle tube is 10 um-500 um.

Preferably, on/off valves are installed on the piping.

Preferably, a plunger is installed on the top of the buffer bottle.

Preferably, several raw material bottles are installed in the raw material box.

Compared with the prior art, the present invention has the following advantages: 1. The present invention can provide a microdroplet array 3D printer composed of multiple printing needles. The printer can print objects made of multiple materials at the same time.

Operating multiple printheads simultaneously can significantly reduce printing time. Additionally, large objects can be printed at one time without manual feeding in the workplace with a continuous feeding system. 2. Since the present invention prepares the microdroplet generator array through the microdroplet generators, the processing format can be expanded infinitely. Therefore, the present invention can effectively and accurately perform surface feeding and scanning molding for large-format and large-size castings, which increases the forming rate, reduces the manufacturing process time, and greatly improves work efficiency. 3. The diameter of the needle tubes of microdroplet generators can be changed according to printing requirements such as printing precision. Additionally, the capacity of the needle tubes of the microdroplet generators can be determined based on the required volume of the object to be printed, etc. 4. The device of the present invention is simple, easy to use and has a wide range of applications, including printing materials in various forms such as powder, liquid and gel. It can be used in various 3D printing casting methods such as direct ink writing (DIW), stereolithography (SLA), etc. The device of the invention is applicable to all printing materials such as liquid and gel that can be magnetically attracted. 5. The present invention can make the material liquid extrusion volume more precise. In addition, the printing material supply system is completely closed, which prevents leakage to the outside and ensures safe use. Since the printing platform is constituted by the electromagnet, when the printing platform is turned on, it is magnetic. The extruded magnetic microdroplets can stick in a controlled manner on the printing platform. Print drop points are more precise than those controlled pneumatically. This process can replace gas path drive, reducing gas usage and saving money. Several bottles of raw material can be added to the supply system according to actual needs. This device can achieve 3D printing of microdroplets with multi-materials.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is a front view of the overall structure of the present invention.

Figure 2 is a structural diagram of the microdroplet generators 16.

Figure 3 is a top view of the microdroplet generators 16.

Figure 4 is a diagram of the connection between the solenoid valve 162 and the needle tube 161.

Figure 5 is a process diagram of the feed liquid supply.

Figure 6 is a front sectional view of the overall structure of the present invention.

Figure 7 is a partial enlarged perspective view of B in Figure 6.

Figure 8 is a partial enlarged view of A in Figure 1.

Figure 9 is a side sectional view of the overall structure of the present invention.

Figure 10 is a partial enlarged view of C of Figure 9.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Embodiment 1: This embodiment will be described by combining Figures 1-10, this embodiment includes a work box body 1, a lifting mechanism 2, a printing platform 3, a rotation mechanism 4, a laser 5, a mounting arm 6, a column 7, a raw material box 8, a buffer bottle 11, a mounting plate 15, microdroplet generators 16, feeding tubes 17, a tube infusion 18 and piping 19. The laser 5, the mounting plate 15 and the printing platform 3 are arranged horizontally from top to bottom. The laser 5 is installed at the bottom of the mounting arm 6, which is fixedly connected to the column 7. The mounting plate 15 is installed on the bottom of the rotation mechanism 4. The rotation mechanism 4 is hinged with the column 7, which is fixedly connected to the workbox body 1. The printing platform 3 is installed on the lifting rod 201 of the lifting mechanism 2. The lifting mechanism 2 is installed inside the workbox body 1 The microdroplet generators 16 are arranged between the mounting plate 15 and the printing platform 3. An infusion hole 151 is arranged inside the mounting plate 15. The microdroplet generators 16 communicate with the hole infusion tube 151 via the supply tubes 17. One end of the infusion tube 18 communicates with the infusion hole 151, and the other end of the infusion tube 18 communicates with the buffer bottle 11 , which communicates with the raw material box 8 through piping 19. The microdroplet generators 16 include a support plate 163, four support rods 164, several needle tubes 161 and several solenoid valves 162. Several needle tube mounting holes needle 1631 are arranged on the support plate 163. The plurality of needle tube mounting holes 1631 are arranged in a matrix. The plurality of needle tubes 161 correspond to the plurality of needle tube mounting holes 1631 one by one. The needle tubes 161 are arranged in the middle of the needle tube mounting holes 1631. The plurality of solenoid valves 162 correspond to the plurality of needle tubes 161.

The solenoid valves 162 are installed on the needle tubes 161 and sleeve the needle tubes 161. The solenoid valves 162 are electrically connected to the computer controller 9. The support plate 163 is welded to the mounting plate 15 via the support rods. bracket 164, which are respectively arranged on the four corners of the bottom of the mounting plate 15. The diameter of the needle tube 161 is 10um-500um.

On/off valves 191 are installed on the pipeline 19. A piston is installed on the upper part of the buffer bottle 11. Several raw material bottles are installed in the raw material box. There is a piston on each raw material bottle, the discharge is controlled by the piston. Supporting feet 12 are respectively welded on the four corners of the bottom of the work box body 1, which is favorable for supporting the equipment. The lifting mechanism 2 includes the lifting rod 201, a lifting plate 202, guide rods 203, a base 204, a servo motor 205, a threaded rod 206, a tangent wheel 207 and a bearing seat 208, a first driven bevel gear 209, a worm 210, a first driving bevel gear 211, a rotating shaft 212 and a first fixed block 213. The base 204 is installed on one side of the inner lower surface of the work box body 1, at the top of which the servo motor 205 is installed. The output end of the servo motor 205 fixes and sleeves the first motor gear 211. The first driven gear is located on the engagement of the outer circumference of the first motor bevel gear 211. The shaft rotary 212 is fixed in the center of the first driven bevel gear 209. The two ends of the rotating shaft 212 are respectively rotatably connected to the first fixed block 213, which is symmetrically installed on one side of the inner bottom surface of the box body working 1. The center of the rotating shaft 212 fixes and sleeves the endless screw 210, one side of the outer circumference of which engages with the tangent wheel 207, the center of which is crossed by the threaded rod 206. The part upper part of the threaded rod 206 is movably sleeved by the lifting plate 202, which is connected to the threaded rod 206 by form cooperation using a ball nut, and the two ends of the threaded rod 206 are respectively rotatably connected with the bearing seat 208, which is symmetrically installed on the inner upper and lower surfaces of the work box body 1. The lifting rod 201 is installed in the center of the top of the lifting plate 202, and the middle and lower part of the lifting rod 201 passes through the other side of the top of the work box body 1. The printing platform 3 is installed at the top of the lifting rod 201. The guide rods 203 pass through respectively movably the four corners of the lifting plate 202. The tops and bottoms of the guide rods 203 are respectively fixedly connected to the inner upper and lower surfaces of the work box body 1, which helps to ensure the direction of movement of the lifting plate 202 through the guide rod 203. One side of the middle and upper part of the column 7 is provided with a half-arc groove 13, in the middle of which the lifting mechanism is installed. rotation 4, which includes a rotating block 401, a rotating arm 402, a thrust bearing 403, a connecting rod 404, a fixed shaft 405, a second fixed block 406, a second driven bevel gear 407, a damping block 408, a second motor bevel gear 409 and a drive motor 410. The interior of the half-arc groove 13 is connected to the rotating block 401, on one side of which the rotating arm 402 is installed, which passes through the groove in half arc 13. The connecting rods 404 are respectively installed in the center of the top and bottom of the rotating block 401. The outer circumferences of the two connecting rods 404 are respectively sleeved and fixed by the thrust bearings 403. The outer circumferences of the thrust bearings 403 are welded respectively with the inner circumference of the column 7. The lower center of the connecting rod 404 of the bottom of the rotating block 401 is provided with the fixed shaft 405, the center of which movably passes through one side in top of the work box body 1. The lower end of the fixed shaft 405 is fixedly connected to the second driven bevel gear 407,

whose outer circumference engages with that of the second driving bevel gear 409, which is installed at the output end of the driving motor 410. The damping block 408 is connected to the bottom of the driving motor 410. The damping block 408 is fixedly connected to the other side of the bottom of the work box body 1. The center of the fixed shaft 405 is movably sleeved to the second fixed block 406, which is rotatably connected to the The fixed shaft 405. The second fixed block 406 is installed on one side at the top of the work box body 1. A mounting plate 15 is installed on the bottom of the rotating arm 402.

The working principle of the present invention is as below: In the process of using the present invention, at the beginning, enough printing feed liquid is put into the raw material box 8 (It is that is, enough printing material liquid is put into the several raw material bottles in the raw material box 8), and the printing platform 3 is adjusted to the highest position; then use 3D modeling software to create a model in the computer, use different colors to set the requirements of different materials in the body to be printed, use the software to cut the 3D model into a surface model, and send it to the computer controller 9 of the additive manufacturing device; The colors of the printing pattern correspond to the raw material bottles, and the on/off valves 191 of the different raw material bottles in the raw material box 8 are started by identifying different colors in the printer software; during printing, when the first material bottle a needs to be discharged, open the on/off valve 191 of the first material bottle a, the on-off valves 191 of the second material bottle b and the third material bottle they are all closed; when the material in the material bottle a enters the buffer bottle 11, the on-off valve 191 of the material bottle a closes, and then extrude the liquid in the buffer bottle 11 to extrude the raw material into the tube to needle 161 corresponding to the bottle of material required. After the material liquid is fed into material bottle a, open the on/off valve 191 of material bottle b. The following steps are the same as the raw material of material bottle a. After the feeding of the material liquid into the material bottle b is finished, the on-off valve 191 of the material bottle c is opened, and so on, other types of feed liquids enter the tubes with needle.

When printing begins, the discharge needle tube 161 is controlled by the solenoid valve 162 outside the tube to extrude a certain volume of feed liquid. Printing platform 3 is an electromagnetic platform. After the printing platform 3 is turned on, it generates magnetic action to accurately stick the liquid drops at the needle head on the printing platform 3, and the printing is finished layer by layer until the end. At this time, the 3D printing of the microdroplet generator array is finished.

During the printing process, the working principle of lifting mechanism 2 is as below: turn on the servo motor 205, the output end of the servo motor 205 starts to rotate, then it drives the rotation of the first bevel gear motor 211 , then it drives the rotation of the first driven bevel gear 209, then it drives the rotation of the rotating shaft 212, then it drives the rotation of the endless screw 210, then it drives the rotation of the tangent wheel 207, then it drives the threaded rod 206 to rotate, then it drives the lifting plate 202 to move upward along the guide rod 203, then it drives the lifting rod 201 to move upward, then it drives the printing platform 3 to move upwards until the printing platform 3 arrives at the highest point.

The working principle of rotation mechanism 4 is as below: open the drive motor 410, the output end of the drive motor 410 starts to rotate, then it drives the second drive bevel gear to rotate 409, then it drives the rotation of the second driven bevel gear 407, then it drives the rotation of the fixed shaft 405, then it drives the rotation of the connecting rod 404, then it drives the rotation of the rotating block 401, then it causes the rotation of the rotating arm 402, then it causes the rotation of the mounting plate 15, and then the rotation of the microdroplet generators 16 accordingly. During SLA 3D printing, after the feed liquid falls on the printing platform 3, the mounting plate 15 rotates 90 degrees, and after the laser 5 is turned on, the laser 5 can directly irradiate the printing platform 3 to complete the photocuring of the printing feed liquid. Once all print layers are finished, print platform 3 will move down one level, and so on until printing is complete.

For one skilled in the art, the present invention is not limited to the details of the exemplary embodiments described above, and the present invention may be carried out in other specific forms without departing from its spirit or its characteristics. essential. Consequently, the embodiments must be considered exemplary and non-limiting in all respects. The scope of the invention is defined by the claims and not by the preceding description. All changes in the meaning and limitations of the equivalents of the claims are to be included within the present invention. Any reference sign in a claim shall not be construed as limiting the claim concerned.

Claims (6)

1) Multi-material additive manufacturing device for large-format precise molding, including a workbox body (1), a lifting mechanism (2), a printing platform (3), a rotating mechanism (4) , a laser (5), and a mounting arm (6), a column (7), a raw material box (8), a buffer bottle (11), a mounting plate (15), generators microdroplets (16), feeding tubes (17), an infusion tube (18) and piping (19); in which, the laser (5), the mounting plate (15) and the printing platform (3) are arranged horizontally from top to bottom, the laser (5) is installed at the bottom of the mounting arm (6), which is fixedly connected to the column (7), the mounting plate (15) is installed on the bottom of the rotation mechanism (4), the rotation mechanism (4) is hinged with the column (7), which is connected fixedly to the work box body (1), the printing platform (3) is installed on the lifting rod (201) of the lifting mechanism (2), the lifting mechanism (2) is installed inside of the work box body (1); the device is characterized in that the microdroplet generators (16) are arranged between the mounting plate (15) and the printing platform (3), an infusion hole (151) is arranged inside the mounting plate (15), the microdroplet generators (16) communicate with the infusion hole (151) through the supply tubes (17). One end of the infusion tube (18) communicates with the infusion hole (151), and the other end of the infusion tube (18) communicates with the buffer bottle (11), which communicates with the box raw material (8) via the piping (19). 2) Multi-material additive manufacturing device for large format precise molding according to claim 1, characterized in that the microdroplet generators (16) comprise a support plate (163), four support rods (164), several tubes to needle (161) and several solenoid valves (162), several needle tube mounting holes (1631) are provided on the support plate (163), the several needle tube mounting holes (1631) are arranged in an array, the plurality of needle tubes (161) correspond to the plurality of needle tube mounting holes (1631) one by one, the needle tubes (161) are arranged in the middle of the needle tube mounting holes ( 1631), the multiple solenoid valves (162) correspond to the multiple needle tubes (161) one by one, the solenoid valves (162) are installed on the needle tubes (161) and sleeve the needle tubes (161), the solenoid valves (162) are electrically connected to the computer controller (9), the support plate (163) is welded to the mounting plate (15) via the support rods (164), and the four support rods (164) are respectively provided on the four corners of the bottom of the mounting plate (15). 3) Multi-material additive manufacturing device for large format precise molding according to claim 2, characterized in that the diameter of the needle tube (161) is 10 um-500um. 4) Multi-material additive manufacturing device for large format precise molding according to claim 1, 2 or 3, characterized in that on/off valves (191) are installed on the piping (19). 5) Multi-material additive manufacturing device for large format precise molding according to claim 4, characterized in that a piston is installed on the upper part of the buffer bottle (11). 6) Multi-material additive manufacturing device for large format precise molding according to claim 5, characterized in that several bottles of raw material are installed in the raw material box (8).