Spray head blowing and filling integrated multi-material supply mechanism and method for ceramic photocuring additive equipment

Abstract

The invention discloses a nozzle blowing and filling integrated multi-material supply mechanism and method for ceramic photocuring additive equipment. The nozzle blowing and filling integrated multi-material supply mechanism and method are used for solving the problems that in a stereolithography SLA / spray deposition DIW composite multi-material printing process, the supply efficiency of multiple materials is low, and the forming speed is low. Comprising a linear module, an installation assembly, a fine adjustment assembly, a telescopic assembly, a material spraying nozzle and an air spraying nozzle, the linear module is fixed to a guide rail of the printer, the fine adjustment assembly is connected with the linear module through the installation assembly and moves up and down along the linear module, the fine adjustment assembly has vertical telescopic performance, and the material spraying nozzle is fixed to a movable part of the fine adjustment assembly; the air injection nozzle is connected with the material injection nozzle through the telescopic assembly, the telescopic assembly has transverse flexibility, and the distance between the air injection nozzle and the material injection nozzle is adjusted through the telescopic assembly. The material spraying nozzles are transversely arranged side by side, space cooperative movement is achieved, the printing path and the material extrusion amount are adjusted in real time, and the layer-by-layer progressive filling effect is achieved through side-by-side printing.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of stereolithography printing technology, in particular to a nozzle blowing and filling integrated multi-material supply mechanism and method for a ceramic light-cured additive manufacturing device. BACKGROUND

[0002] In the stereolithography SLA / inkjet deposition DIW composite multi-material printing process, there are problems of low multi-material supply efficiency and slow forming speed. Figure 6 As shown in the figure, 1, low multi-material supply efficiency; (1) switching delay and residual pollution: different materials have large differences in physical properties, and single nozzle switching requires thorough cleaning of the pipeline, which takes up to several minutes / time, resulting in 30%-50% of the time wasted on non-printing operations. Residual materials can easily cause cross contamination, reduce the electrical performance of functional structures, and force the system to frequently shut down for maintenance. (2) Unstable extrusion of high-viscosity materials: the yield stress of ceramic / metal paste with a solid content of >70% required by DIW is high, and traditional screw extrusion has pulsation phenomenon, which requires repeated calibration of extrusion pressure and speed, and the supply continuity is poor, and the failure rate increases by more than 40% when printing complex nested structures. (3) Limited capacity of the supply system: the space occupied by multiple independent material bins is large, and small and medium-sized devices can only load 3-5 materials. When printing large components, the original material needs to be supplemented in the middle, interrupting the automatic process and further slowing down the overall efficiency. 2, slow forming speed; (1) process compatibility conflict: SLA requires global solidification layer by layer, while DIW requires precise extrusion according to the path. The mismatch between the two rhythms leads to frequent start and stop of the equipment, for example, DIW needs to wait for SLA to solidify after completing local filling, and the effective printing time accounts for less than 60%. (2) Complex path planning: multiple materials alternate deposition requires frequent change of nozzle position. For example, 5 materials are used to print a 10x10mm area, the traditional "back" path is 300% longer than single material in actual printing time due to corner deceleration and start-stop jitter, and the sudden acceleration is prone to cause layer misalignment. (3) Time-consuming interface processing: in order to ensure the interface bonding strength between SLA resin and DIW functional materials, additional post-curing or heat treatment is often required, which prolongs the forming cycle by 50%-80% compared with single process. These defects together result in a comprehensive efficiency of the composite process that is less than 1 / 3 of the single process, especially in large-size multi-material component manufacturing, the forming time can reach hundreds of hours, which seriously limits the expansion of industrial application scenarios. The breakthrough direction needs to focus on the innovation of material switching mechanism, the upgrade of motion control algorithm and the optimization of energy field synergy. SUMMARY

[0003] The purpose of the present application is to provide a nozzle blowing and filling integrated multi-material supply mechanism and method for a ceramic light-cured additive manufacturing device, which solves the problems of low multi-material supply efficiency and slow forming speed in the stereolithography SLA / inkjet deposition DIW composite multi-material printing process.

[0004] The technical scheme adopted by the present application to solve its technical problems is: a nozzle blowing and filling integrated multi-material supply mechanism for a ceramic light-cured additive equipment, comprising a linear module, a mounting assembly, a fine adjustment assembly, a telescopic assembly, a material spraying nozzle and a gas spraying nozzle, the linear module is fixed on the guide rail of the printer, the fine adjustment assembly is connected with the linear module through the mounting assembly and moves up and down along the linear module, the fine adjustment assembly itself has vertical telescopic property, the material spraying nozzle is fixed on the movable part of the fine adjustment assembly, the gas spraying nozzle is connected with the material spraying nozzle through the telescopic assembly, the telescopic assembly itself has horizontal telescopic property, and the distance between the gas spraying nozzle and the material spraying nozzle is adjusted through the telescopic assembly.

[0005] Further, the mounting assembly comprises a mounting plate, an upper sliding rail and a lower clamping part, the first end of the mounting plate is fixedly connected with the linear module, the upper sliding rail is fixed at the second end of the mounting plate, the lower clamping part is slidingly connected with the upper sliding rail and has a locking part between the two; the fine adjustment assembly is fixed on the lower clamping part.

[0006] Further, the fine adjustment assembly comprises a fixed block, a movable block and a knob, the fixed block is fixedly connected with the lower clamping part, the first end of the knob is rotationally connected with the fixed block, the second end of the knob is threadedly connected with the movable block, and the movable block is slidingly connected with the fixed block, and the material spraying nozzle is fixed on the movable block.

[0007] Further, the first end of the knob further has circumferentially arranged scales.

[0008] Further, the fixed block and the movable block are both L-shaped structures and are assembled by buckling, one end of the movable block is enlarged and is slidingly connected with the outer wall of the fixed block.

[0009] Further, the telescopic assembly comprises an inner rod and an outer cylinder which are arranged inside and outside and are threadedly matched, the first end of the inner rod is fixedly connected with the material spraying nozzle, the second end of the inner rod is located inside the outer cylinder, and the end of the outer cylinder is fixedly connected with the gas spraying nozzle.

[0010] Further, the material spraying nozzle and the gas spraying nozzle are both multiple and are arranged side by side, and the material spraying nozzle and the gas spraying nozzle are one-to-one corresponding.

[0011] The present application also provides a supply method of a nozzle blowing and filling integrated multi-material supply mechanism for a ceramic light-cured additive equipment, comprising the following steps: S1, a 3D printing model is established, the 3D printing model is grouped and segmented, and the parameters of each group target model are determined, the parameters include printing path and printing material, and then the overall printing path of the 3D printing model is planned; S2, start printing based on the whole printing path, when the printing of one area is completed, stop printing automatically according to path planning; at this time, the feeding mechanism of the application is called, the previous printing material is cleaned by using the air jet nozzle, and then the printing operation is performed by using the material spraying nozzle; S3, the substrate material from the feeding platform and coated by the scraper is solidified by the laser system, the residual substrate material on the extrusion path of the corresponding material spraying nozzle is cleaned by blowing air through the air jet nozzle, different substrate materials are solidified by switching different material spraying nozzles, and the printing of the multi-material component is completed.

[0012] The beneficial effects of the application are that: the material spraying nozzle of the application adopts a side-by-side horizontal layout, realizes space collaborative motion, adjusts the printing path and the material extrusion amount in real time, realizes the effect of layer-by-layer progressive filling by side-by-side printing, and the feeding efficiency is high and the forming speed is fast when printing multiple materials. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the installation position diagram of the printer of the application; Figure 2 It is a three-dimensional diagram of the application; Figure 3 It is a three-dimensional diagram of the installation assembly; Figure 4 It is a three-dimensional diagram of the fine adjustment assembly; Figure 5 It is a three-dimensional diagram of the telescopic assembly; Figure 6 It is a flow chart of the traditional multi-material printing method; Figure 7 It is a flow chart of the blowing and filling integrated printing method of the application; In the figure: 1 printer frame, 2 first guide rail, 3 galvanometer system, 4 second guide rail, 5 linear module, 6 fine adjustment assembly, 61 fixed block, 62 movable block, 63 knob, 7 installation assembly, 71 installation plate, 72 upper slide rail, 72 lower clamping piece, 8 telescopic assembly, 81 inner rod, 82 outer cylinder, 9 material spraying nozzle, 10 air jet nozzle, 11 scraper frame. DETAILED DESCRIPTION

[0014] The nozzle blowing and filling integrated multi-material feeding mechanism for the ceramic photocuring additive equipment of the application is installed on a stereolithography printer, like Figure 1As shown in the figure, the stereolithography printer comprises a printer frame 1, a pair of first rails 2 transversely arranged and fixed on the printer frame 1, a galvanometer system 3 arranged above the first rails 2, a second rail 4 longitudinally arranged and slidingly installed on the first rails 2, the first rails 2 and the second rail 4 being arranged perpendicularly, the second rail 4 moving along the first rails 2, and a driving mechanism arranged on the first rails 2 and driving the second rail 4 to move along the first rails 2. A doctor blade holder 11 is slidingly arranged on the second rail 4, and the supply mechanism of the application is installed on the doctor blade holder 11. The structure and working principle of the supply mechanism of the application will be described in detail below in combination with the drawings.

[0015] As shown in the figure, Figure 2 A nozzle blowing and filling integrated multi-material supply mechanism for a ceramic light-cured additive equipment comprises a linear module 5, a mounting assembly 7, a fine adjustment assembly 6, a telescopic assembly 8, a material spraying nozzle 9 and a gas spraying nozzle 10. The linear module 5 is fixed on the rails of the printer. The fine adjustment assembly 6 is connected with the linear module 5 through the mounting assembly 7 and moves up and down along the linear module 5. The fine adjustment assembly 6 itself has vertical telescopic property. The material spraying nozzle 9 is fixed on the movable part of the fine adjustment assembly 6. The gas spraying nozzle 10 is connected with the material spraying nozzle 9 through the telescopic assembly 8. The telescopic assembly 8 itself has horizontal telescopic property, and the distance between the gas spraying nozzle 10 and the material spraying nozzle 9 is adjusted through the telescopic assembly 8.

[0016] Specifically, as shown in the figure, Figure 3 The mounting assembly 7 comprises a mounting plate 71, an upper sliding rail 72 and a lower clamping part 73. The first end of the mounting plate 71 is fixedly connected with the linear module 5. The upper sliding rail 72 is fixed on the second end of the mounting plate 71. The lower clamping part 73 is slidingly connected with the upper sliding rail 72 and has a locking part therebetween. The locking part can be a top screw. The fine adjustment assembly 6 is fixed on the lower clamping part 73.

[0017] As shown in the figure, Figure 4 The fine adjustment assembly 6 comprises a fixed block 61, a movable block 62 and a knob 63. The fixed block 61 is fixedly connected with the lower clamping part 73 of the mounting assembly. The first end of the knob 63 is rotationally connected with the fixed block 61. The second end of the knob 63 is threadedly connected with the movable block 62. The movable block 62 is slidingly connected with the fixed block 61. The material spraying nozzle 9 is fixed on the movable block. The first end of the knob 63 also has a scale to show the distance of the movable block 62 relative to the fixed block 61. Specifically, the fixed block 61 and the movable block 62 are both L-shaped structures and are assembled by buckling. One end of the movable block 62 is enlarged and slidingly connected with the outer wall of the fixed block 61.

[0018] As shown in the figure, Figure 5As shown, the telescopic assembly 8 includes an inner rod 81 and an outer cylinder 82 that are internally and externally arranged and threaded together. The first end of the inner rod 81 is fixedly connected to the spray nozzle 7, and the second end of the inner rod 81 is located inside the outer cylinder 82. One end of the outer cylinder 82 is fixedly connected to the air jet nozzle 10. There are multiple spray nozzles 9 and air jet nozzles 10 arranged side by side, and each spray nozzle 9 and air jet nozzle 10 corresponds to the other.

[0019] like Figure 7 As shown, the method of using a multi-material supply mechanism integrating nozzle blowing and filling in a ceramic photopolymerization additive manufacturing equipment on a stereolithography printer includes the following steps: S1. Establish a 3D printing model, divide the 3D printing model into groups, and determine the parameters of the target model for each group, including the printing path and printing material. Then, plan the overall printing path of the 3D printing model. S2. Printing begins based on the overall printing path. After printing a region is completed, printing automatically stops according to the path planning. At this time, the supply mechanism of the present invention is invoked to clean the previously printed material using the jet nozzle, and then the printing operation is performed using the jet nozzle.

[0020] S3. The laser system cures the substrate material from the feeding platform that has been smoothed by the scraper. Then, the residual substrate material on the extrusion path of the corresponding spray nozzle is cleaned by blowing air through the jet nozzle. By switching different spray nozzles, different substrate materials are cured to complete the printing of multi-material components.

[0021] The nozzles of this invention adopt a side-by-side horizontal layout to achieve spatial coordinated movement, adjust the printing path and material extrusion amount in real time, and achieve a layer-by-layer progressive filling effect through side-by-side printing. As a result, the material supply efficiency is high and the forming speed is fast when printing multiple materials.

Claims

1. A multi-material supply mechanism integrating nozzle blowing and filling for ceramic photopolymerization additive manufacturing equipment, characterized in that, The printer includes a linear module, a mounting assembly, a fine-tuning assembly, a telescopic assembly, a printing nozzle, and an air nozzle. The linear module is fixed on the printer's guide rail. The fine-tuning assembly is connected to the linear module via the mounting assembly and moves up and down along the linear module. The fine-tuning assembly itself has vertical telescopic capability. The printing nozzle is fixed on the movable part of the fine-tuning assembly. The air nozzle is connected to the printing nozzle via the telescopic assembly. The telescopic assembly itself has lateral telescopic capability, and the distance between the air nozzle and the printing nozzle is adjusted by the telescopic assembly.

2. The multi-material supply mechanism integrating nozzle blowing and filling for ceramic photopolymer additive manufacturing equipment according to claim 1, characterized in that, The mounting assembly includes a mounting plate, an upper slide rail, and a lower clamping member. The first end of the mounting plate is fixedly connected to the linear module. The upper slide rail is fixed to the second end of the mounting plate. The lower clamping member is slidably connected to the upper slide rail, and a locking member is provided between the two. The fine-tuning component is fixed on the lower clamping member.

3. The multi-material supply mechanism integrating nozzle blowing and filling for ceramic photopolymer additive manufacturing equipment according to claim 2, characterized in that, The fine-tuning component includes a fixed block, a movable block, and a knob. The fixed block is fixedly connected to the lower clamping member. The first end of the knob is rotatably connected to the fixed block, and the second end of the knob is threadedly connected to the movable block. The movable block is slidably connected to the fixed block, and the spray nozzle is fixed on the movable block.

4. The multi-material supply mechanism integrating nozzle blowing and filling for ceramic photopolymerization additive manufacturing equipment according to claim 3, characterized in that, The first end of the knob also has circumferentially arranged scales.

5. The multi-material supply mechanism integrating nozzle blowing and filling for ceramic photopolymer additive manufacturing equipment according to claim 4, characterized in that, Both the fixed block and the movable block are L-shaped structures and are fastened together. One end of the movable block is enlarged and slides to connect with the outer wall of the fixed block.

6. The multi-material supply mechanism integrating nozzle blowing and filling for ceramic photopolymerization additive manufacturing equipment according to claim 5, characterized in that, The telescopic assembly includes an inner rod and an outer cylinder that are internally and externally arranged and threaded together. The first end of the inner rod is fixedly connected to the spray nozzle, the second end of the inner rod is located inside the outer cylinder, and one end of the outer cylinder is fixedly connected to the air spray nozzle.

7. A multi-material supply mechanism integrating nozzle blowing and filling for ceramic photopolymerization additive manufacturing equipment according to claim 6, characterized in that, The material spray nozzles and air jet nozzles are multiple nozzles arranged side by side, and each material spray nozzle and air jet nozzle corresponds to the other.

8. The supply method of the multi-material supply mechanism integrating nozzle blowing and filling for ceramic photopolymerization additive manufacturing equipment according to claim 7, characterized in that, Includes the following steps: S1. Establish a 3D printing model, divide the 3D printing model into groups, and determine the parameters of the target model for each group, including the printing path and printing material. Then, plan the overall printing path of the 3D printing model. S2. Printing begins based on the overall printing path. After printing a region is completed, printing automatically stops according to the path planning. At this time, the supply mechanism of the present invention is invoked to clean the previously printed material using the jet nozzle, and then the printing operation is performed using the jet nozzle. S3. The laser system cures the substrate material from the feeding platform that has been smoothed by the scraper. Then, the residual substrate material on the extrusion path of the corresponding spray nozzle is cleaned by blowing air through the jet nozzle. By switching different spray nozzles, different substrate materials are cured to complete the printing of multi-material components.

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