A laser material adding and subtracting composite device

Abstract

The present application relates to a laser additive and subtractive composite device, including a housing body, a liquid tank and a first driving mechanism, wherein the liquid tank is fixedly connected to the housing body, a molding platform is slidably connected in the liquid tank along the vertical direction, a plurality of scraper rods are movably connected in the liquid tank, the plurality of scraper rods are evenly distributed along the circumference of the liquid tank, and a plurality of scraper blocks are movably connected at one opposite end of the plurality of scraper rods, and the first driving mechanism is used to drive the sliding of the plurality of scraper rods, and when the molding platform rises after the processing is completed, the plurality of scraper blocks are respectively abutted against the product. When the platform rises after the processing is completed, the first driving mechanism drives the sliding of the plurality of scraper rods, so that the scraper rods scrape the surface of the product, scrape and clean the resin liquid on the surface of the product, and return the scraped resin liquid to the liquid tank, so as to facilitate the cleaning of the resin liquid and reduce the waste of the resin liquid.

Description

Technical Field

[0001] The invention relates to the field of laser material addition and subtraction, and in particular to a laser material addition and subtraction composite device. Background Art

[0002] Photosensitive resin is often cured by using UV laser as a light source to achieve stereolithography. Through the CNC device, the laser beam controls the galvanometer scanning, and irradiates the surface of the liquid photosensitive resin through the designed scanning path to solidify the resin in a specific area of ​​the surface. After each layer is processed, one end of the object is generated, and then the lifting platform is lowered by a layer, and the cured layer is covered with another layer of resin liquid, and then the next layer is scanned. The latter cured layer is closely combined with the former cured layer, and is superimposed layer by layer to form a three-dimensional workpiece prototype to achieve the purpose of additive processing.

[0003] After the product processing is completed, the entire product is soaked in resin liquid. When the molding platform rises, a large amount of resin liquid will remain on the surface of the processed product. The existing equipment needs to manually clean the resin liquid on the surface of the product after processing. Since the resin liquid contains trace toxicity and does not meet food safety standards, the health and safety of the equipment operators cannot be guaranteed. Summary of the invention

[0004] In order to facilitate the cleaning of the resin liquid, the present application provides a laser additive and subtractive composite device.

[0005] The present application provides a laser additive and subtractive composite device that adopts the following technical solution:

[0006] A laser additive and subtractive composite device comprises a casing body, a liquid tank and a first driving mechanism, wherein the liquid tank is fixedly connected to the casing body, a molding platform is slidably connected in the liquid tank along a vertical direction, a plurality of scraper rods are movably connected in the liquid tank, the plurality of scraper rods are evenly distributed along the circumference of the liquid tank, and a plurality of scraper blocks are movably connected to opposite ends of the plurality of scraper rods, and the first driving mechanism is used to drive the sliding of the plurality of scraper rods, and when the molding platform rises after the processing is completed, the plurality of scraper blocks are respectively abutted against the product.

[0007] By adopting the above technical solution, when the platform rises after product processing is completed, the first driving mechanism drives the sliding of multiple scraper rods, so that the scraper rods scrape the surface of the product, scrape and clean the resin liquid on the surface of the product, and return the scraped resin liquid to the liquid tank, which is convenient for cleaning the resin liquid and reduces the waste of resin liquid.

[0008] Preferably, the first driving mechanism includes a conveyor belt and a driving source, the conveyor belt is connected to the casing body for circumferential transmission around the liquid tank, and the plurality of scraper rods are respectively connected to the conveyor belt for sliding along a transmission direction perpendicular to the conveyor belt, and a spring is provided at one end of the scraper rods away from the scraper block, and the spring always drives the scraper block to slide toward the opposite side of the other scraper block, and the driving source is used to drive the transmission of the conveyor belt.

[0009] By adopting the above technical solution, the transmission belt is driven by a driving source to transmit, so that multiple scraper rods rotate around the center of the liquid tank. The setting of the spring can reduce the possibility of mutual interference between the scraper rods; when the scraper rods scrape and clean the product, the scraper rods can be attached to the irregular surface of the product.

[0010] Preferably, a second driving mechanism is further included, and a plurality of springs are respectively provided with abutment blocks at one end away from the scraper block, and the plurality of abutment blocks are respectively slidably connected to the casing body along a transmission direction perpendicular to the transmission belt, and the second driving mechanism is used to drive the sliding of the abutment block, and when the abutment block slides to the extreme position toward the side away from the liquid tank, the scraper block slides until it abuts against the inner wall of the liquid tank.

[0011] By adopting the above technical solution, when the molding platform descends a distance of a layer, the second driving mechanism drives the plurality of abutment blocks to move simultaneously toward a side away from the hydraulic tank, so that the scraper rod does not shield the laser.

[0012] Preferably, the second driving mechanism includes multiple connecting blocks and multiple hydraulic cylinders, the multiple connecting blocks are respectively connected to the casing body in a sliding manner along a transmission direction perpendicular to the conveyor belt, the multiple connecting blocks are respectively provided with slide grooves, the multiple abutment blocks are respectively connected in the slide grooves in a sliding manner along the transmission direction of the conveyor belt, the multiple hydraulic cylinders are respectively fixedly connected to the casing body, the multiple hydraulic cylinders correspond to multiple connecting blocks, one ends of the piston rods of the multiple hydraulic cylinders are respectively fixedly connected to the corresponding connecting blocks, and when the multiple connecting blocks slide toward one side of the liquid tank to the extreme position, the multiple slide grooves are connected.

[0013] By adopting the above technical solution, the piston movement of multiple hydraulic cylinder piston rods drives the connecting block to reciprocate. When processing is carried out, the hydraulic cylinder drives the connecting block to slide toward the side away from the liquid tank, so that the scraper rod does not interfere with the laser. After processing one layer, the hydraulic cylinder drives the connecting block to slide toward one side of the liquid tank, so that the multiple scraper rods slide toward the center of the liquid tank, and the multiple scraper rods are slid through the transmission belt to scrape the liquid surface of the liquid tank flat. The setting of the slide groove limits the sliding of the multiple scraper rods.

[0014] Preferably, the driving source includes a synchronous belt and a first gear, the synchronous belt is fixedly connected to the transmission belt, the first gear is rotatably connected to the housing body, and the first gear is meshingly connected to the synchronous belt.

[0015] By adopting the above technical solution, the first gear is rotated, and the synchronous belt is driven through the meshing connection between the first gear and the synchronous belt, thereby driving the transmission belt meshing with the synchronous belt.

[0016] Preferably, it also includes a lifting mechanism, which is used to drive the sliding of the forming platform. The lifting mechanism includes a threaded rod, a second gear and a first motor. The threaded rod is fixedly connected to the forming platform, and the second gear is rotatably connected to the casing body along the rotation direction of the forming platform. The threaded rod is passed through and threadedly connected to the second gear. The first motor is fixedly connected to the casing body. One end of the output shaft of the first motor is coaxially and fixedly connected with the third gear, and the third gear and the first gear are respectively meshed with the second gear.

[0017] By adopting the above technical solution, the third gear is driven to rotate by the first motor, so that the second gear meshing with the third gear is rotated, and the screw is moved along the axial direction of the second gear through the threaded connection between the second gear and the screw, and the molding platform fixedly connected to the screw is moved together, and at the same time, the first gear is rotated together through the meshing connection between the second gear and the first gear, and the transmission belt rotates, that is, when the platform descends a distance of a layer, the scraper rod slides to scrape the surface of the liquid tank, which is convenient for the use of the additive and subtractive device, and when the platform rises, the scraper rod continues to move to make the scraper block scrape the surface of the finished product for the cleaning of the resin liquid.

[0018] Preferably, it also includes a vacuum device, which is fixedly connected to the casing body, and a plurality of scraping blocks are respectively provided with air suction ports, and the plurality of air suction ports are respectively connected to the vacuum device through vacuum pumping tubes, and the other end of the vacuum pumping tube is connected to the liquid tank.

[0019] By adopting the above technical solution, the vacuum tube is brought close to the slider to absorb air through the vacuum device, and the resin liquid on the surface of the finished product is sucked through the suction port on the scraper block, thereby reducing the possibility of residual resin liquid on the surface of the finished product. The resin liquid in the gap that the scraper block cannot scrape can be sucked, which is convenient for cleaning the resin liquid. At the same time, one end of the vacuum exhaust tube is connected to the liquid tank, so that the sucked resin liquid returns to the liquid tank, reducing the waste of resin liquid.

[0020] The technical effects of the present invention are mainly reflected in the following aspects:

[0021] 1. The present invention provides a plurality of scraper rods and scraper heads. When the processing is completed and the platform rises, the first driving mechanism drives the plurality of scraper rods to slide, so that the scraper rods scrape the surface of the product and scrape and clean the resin liquid on the surface of the product, thereby facilitating the cleaning of the resin liquid.

[0022] 2. The present invention sets a second driving mechanism, and drives the connecting block to reciprocate through the piston movement of multiple hydraulic cylinder piston rods. When processing, the hydraulic cylinder drives the connecting block to slide toward the side away from the liquid tank, so that the scraper rod does not interfere with the laser. After processing a layer, the hydraulic cylinder drives the connecting block to slide toward one side of the liquid tank, so that the multiple scraper rods slide toward the center of the liquid tank, and the multiple scraper rods slide through the transmission belt to scrape the liquid surface of the liquid tank flat; the setting of the slide groove limits the sliding of the multiple scraper rods;

[0023] 3. The present invention makes the third gear and the first gear mesh with the second gear respectively, and drives the third gear to rotate through the first motor, so that the second gear meshed with the third gear rotates, and the screw is moved along the axial direction of the second gear through the threaded connection between the second gear and the screw, and the molding platform fixedly connected to the screw moves together, and at the same time, the first gear rotates together through the meshing connection between the second gear and the first gear, and the transmission belt rotates, that is, when the platform descends a distance of a layer, the scraper rod slides to scrape the surface of the liquid tank, which is convenient for the use of the additive and subtractive device, and when the platform rises, the scraper rod continues to move to make the scraper block scrape the surface of the finished product for the convenience of cleaning the resin liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0025] Figure 2 It is a schematic diagram of the structure of the first driving mechanism of an embodiment of the present application.

[0026] Figure 3 It is a schematic diagram of the structure of the second driving mechanism of the embodiment of the present application.

[0027] Figure 4 is along Figure 3 Enlarged view of point A in the middle.

[0028] Figure 5 It is a schematic diagram of the scraper rod structure of an embodiment of the present application.

[0029] Figure 6 It is a processing flow chart of the embodiment of the present application.

[0030] Explanation of the reference numerals: 1. Casing body; 11. Liquid tank; 12. Forming platform; 13. Scraper rod; 14. Scraper block; 141. Spring; 142. Abutment block; 143. Suction port; 144. Vacuum device; 145. Vacuum tube; 2. First driving mechanism; 21. Conveyor belt; 22. Driving source; 221. Synchronous belt; 222. First gear; 223. Connecting shaft; 3. Second driving mechanism; 31. Connecting block; 32. Slide groove; 33. Hydraulic cylinder; 4. Lifting mechanism; 41. Threaded rod; 42. Second gear; 43. First motor; 44. Third gear. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-6 The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.

[0032] The embodiment of the present application discloses a laser additive and subtractive composite device.

[0033] Reference Figure 1-Figure 6 A laser additive and subtractive composite device of this embodiment includes a housing body 1, a liquid tank 11 and a first driving mechanism 2. The liquid tank 11 is fixedly connected to the housing body 1. A molding platform 12 is slidably connected in the liquid tank 11 along the vertical direction. A plurality of scrapers 13 are movably connected in the liquid tank 11. The plurality of scrapers 13 are evenly distributed along the circumference of the liquid tank 11. A plurality of scrapers 13 are movably connected to one end of each scraper block 14. The first driving mechanism 2 is used to drive the plurality of scrapers 13 to slide. When the molding platform 12 is raised after the processing is completed, the plurality of scrapers 14 are respectively abutted against the product. When the platform is raised after the processing is completed, the plurality of scrapers 13 are driven to slide by the first driving mechanism 2, so that the scrapers 13 scrape the surface of the product, and the resin liquid on the surface of the product is scraped and cleaned, which is convenient for cleaning the resin liquid. The outer surface of the scraper block 14 is a file tooth surface. When the scraper block 14 scrapes the surface of the molded product, the file tooth surface abuts against the molded product. After the product is formed, when the scraper block 14 scrapes the surface of the product, the toothed surface can file the surface of the product and lubricate it with the resin liquid remaining on the surface of the molded product, making the surface of the product smoother and improving the appearance quality of the product.

[0034] Reference Figure 1-Figure 4The first driving mechanism 2 includes a conveyor belt 21 and a driving source 22. The conveyor belt 21 is connected to the housing body 1 for circumferential transmission around the liquid tank 11. A plurality of scraper rods 13 are respectively connected to the conveyor belt 21 for sliding along the transmission direction perpendicular to the conveyor belt 21. A spring 141 is fixedly connected to one end of the plurality of scraper rods 13 away from the scraper block 14. The spring 141 always drives the scraper block 14 to slide toward the opposite side of the other scraper block 14. The driving source 22 is used to drive the transmission of the conveyor belt 21. The conveyor belt 21 is driven by the driving source 22 to transmit, so that the plurality of scraper rods 13 rotate around the center of the liquid tank 11. The setting of the spring 141 can reduce the possibility of mutual interference between the scraper rods 13. When the scraper rods 13 scrape and clean the product, the scraper rods 13 can be attached to the irregular surface of the product.

[0035] Reference Figure 1-Figure 4 , further comprising a second driving mechanism 3, a plurality of springs 141 are provided with abutment blocks 142 at one end away from the scraper block 14, and the plurality of abutment blocks 142 are respectively connected to the housing body 1 in a sliding manner perpendicular to the transmission direction of the conveyor belt 21, and the second driving mechanism 3 is used to drive the sliding of the abutment blocks 142, and when the abutment blocks 142 slide to the extreme position toward the side away from the liquid tank 11, the scraper block 14 slides until it abuts against the inner wall of the liquid tank 11. When the molding platform 12 descends a layer of distance, the plurality of abutment blocks 142 are driven by the second driving mechanism 3 to move simultaneously toward the side away from the hydraulic tank, so that the scraper rod 13 does not shield the laser.

[0036] Reference Figure 1-Figure 5 The second driving mechanism 3 includes multiple connecting blocks 31 and multiple hydraulic cylinders 33. The multiple connecting blocks 31 are respectively slidably connected to the casing body 1 along the transmission direction perpendicular to the conveyor belt 21. The multiple connecting blocks 31 are respectively provided with slide grooves 32. The multiple abutment blocks 142 are respectively slidably connected in the slide grooves 32 along the transmission direction of the conveyor belt 21. The multiple hydraulic cylinders 33 are respectively fixedly connected to the casing body 1. The multiple hydraulic cylinders 33 correspond to the multiple connecting blocks 31. One ends of the piston rods of the multiple hydraulic cylinders 33 are respectively fixedly connected to the corresponding connecting blocks 31. When the multiple connecting blocks 31 slide to the extreme position toward one side of the liquid tank 11, the multiple slide grooves 32 are connected.

[0037] Reference Figure 1-Figure 5 The connecting block 31 is driven to reciprocate by the piston movement of the piston rods of the multiple hydraulic cylinders 33. When processing is performed, the hydraulic cylinder 33 drives the connecting block 31 to slide toward the side away from the liquid tank 11, so that the scraper rod 13 does not interfere with the laser. After processing one layer, the hydraulic cylinder 33 drives the connecting block 31 to slide toward one side of the liquid tank 11, so that the multiple scraper rods 13 slide toward the center of the liquid tank 11, and the multiple scraper rods 13 are slid through the conveyor belt 21 to scrape the liquid surface of the liquid tank 11 flat; the setting of the slide groove 32 limits the sliding of the multiple scraper rods 13.

[0038] Reference Figure 1-Figure 4 The driving source 22 includes a synchronous belt 221 and a first gear 222. The synchronous belt 221 is fixedly connected to the transmission belt 21. The first gear 222 is rotatably connected to the housing body 1. The first gear 222 is coaxially and fixedly connected to a connecting shaft 223. A synchronous gear is coaxially and fixedly connected to the connecting shaft 223. The synchronous gear is meshed and connected with the synchronous belt 221. The first gear 222 is rotated, and the meshing connection between the first gear 222 and the synchronous belt 221 causes the synchronous belt 221 to transmit, thereby causing the transmission belt 21 meshed and connected with the synchronous belt 221 to transmit.

[0039] Reference Figure 1-Figure 4 , also includes a lifting mechanism 4, the lifting mechanism 4 is used to drive the sliding of the molding platform 12, the lifting mechanism 4 includes a threaded rod 41, a second gear 42 and a first motor 43, the threaded rod 41 is fixedly connected to the molding platform 12, the second gear 42 is rotatably connected to the casing body 1 along the rotation direction of the molding platform 12, the threaded rod 41 is penetrated and threadedly connected to the second gear 42, the first motor 43 is fixedly connected to the casing body 1, and one end of the output shaft of the first motor 43 is coaxially and fixedly connected with the third gear 44, and the third gear 44 and the second gear 42 are respectively meshed with the first gear 222.

[0040] Reference Figure 1-Figure 4 The third gear 44 is driven to rotate by the first motor 43, so that the second gear 42 meshing with the third gear 44 rotates, and the screw is moved along the axial direction of the second gear 42 through the threaded connection between the second gear 42 and the screw, and the molding platform 12 fixedly connected to the screw moves together, and at the same time, the first gear 222 is rotated together through the meshing connection between the second gear 42 and the first gear 222, and the conveyor belt 21 rotates, that is, when the platform descends a distance of a layer, the scraper rod 13 slides to scrape the surface of the liquid tank 11, and when the platform rises, the scraper rod 13 continues to move to allow the scraper block 14 to scrape the surface of the finished product.

[0041] Reference Figure 1-Figure 4, and also includes a vacuum device 144, which is fixedly connected to the housing body 1, and a plurality of scraping blocks 14 are respectively provided with air suction ports 143, and the plurality of air suction ports 143 are respectively connected to the vacuum device 144 through vacuum pumping tubes 145, and the other end of the vacuum pumping tubes 145 is connected to the liquid tank 11. The vacuum device 144 allows the vacuum pumping tube 145 to approach the slider for suction, and the resin liquid on the surface of the finished product is sucked through the air suction port 143 on the scraping block 14, thereby reducing the possibility of residual resin liquid on the surface of the finished product, and the resin liquid in the gap that the scraping block 14 cannot scrape can be sucked, which is convenient for cleaning the resin liquid, and at the same time, one end of the vacuum suction tube is connected to the liquid tank 11, so that the sucked resin liquid returns to the liquid tank 11, thereby reducing the waste of resin liquid.

[0042] Reference Figure 6 A processing technology of a laser additive and subtractive composite device of this embodiment includes the following steps:

[0043] S1: injecting liquid photosensitive resin material into the liquid tank 11 until the scraper rod 13 is located;

[0044] S2: The molding platform 12 rises until it stops at a position one layer thickness away from the liquid surface;

[0045] S3: driving the plurality of scraping rods 13 to slide simultaneously by the first driving mechanism 2 to scrape the liquid surface into a horizontal plane;

[0046] S4: The laser generates a laser beam, which is focused by a lens and then irradiated onto a polarizer. At this time, the polarizer automatically deviates according to the slice section path, so that the beam will continue to selectively scan the liquid surface according to the model data. Due to the photosensitivity of the resin, the irradiated liquid resin gradually solidifies;

[0047] S5: After the curing is completed, the molding platform 12 is lowered by one layer thickness, and the first driving mechanism 2 drives the scraper 13 to scrape the liquid surface again, and the laser is irradiated and cured again, and this is repeated until the entire model processing is completed;

[0048] S6: When the molding platform 12 is lifted, the first driving mechanism 2 drives the plurality of scraping rods 13 to move, and the scraping blocks 14 on the scraping rods 13 scrape the surface of the model, and the vacuum device 144 is started to suck out the resin liquid on the finished product.

[0049] When the platform descends a distance of one layer, the scraper rod 13 slides to scrape the surface of the liquid tank 11, which is convenient for the use of the additive and subtractive device. When the platform rises, the scraper rod 13 continues to move to allow the scraper block 14 to scrape the surface of the finished product to facilitate the cleaning of the resin liquid. The file teeth of the scraper block 14 file the surface of the molded product.

[0050] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A laser additive and subtractive composite device, characterized in that: The invention comprises a casing body (1), a liquid tank (11) and a first driving mechanism (2), wherein the liquid tank (11) is fixedly connected to the casing body (1), a molding platform (12) is slidably connected in the liquid tank (11) along a vertical direction, a plurality of scraping rods (13) are movably connected in the liquid tank (11), the plurality of scraping rods (13) are evenly distributed along the circumference of the liquid tank (11), and a plurality of scraping blocks (14) are movably connected at opposite ends of the plurality of scraping rods (13), and the first driving mechanism (2) is used to drive the plurality of scraping rods (13) to slide, and when the molding platform (12) is raised after the processing is completed, the plurality of scraping blocks (14) are respectively in contact with the product; The first driving mechanism (2) comprises a conveyor belt (21) and a driving source (22); the conveyor belt (21) is connected to the casing body (1) in a circumferential transmission around the liquid tank (11); the plurality of scraper rods (13) are respectively connected to the conveyor belt (21) in a sliding manner along a transmission direction perpendicular to the conveyor belt (21); a spring (141) is provided at one end of the plurality of scraper rods (13) away from the scraper block (14); the spring (141) always drives the scraper block (14) to slide toward another side of the scraper block (14) opposite thereto; and the driving source (22) is used to drive the transmission of the conveyor belt (21); It also includes a second driving mechanism (3), wherein a plurality of springs (141) are respectively provided with abutment blocks (142) at one end away from the scraper block (14), and the plurality of abutment blocks (142) are respectively connected to the casing body (1) in a sliding manner along a transmission direction perpendicular to the transmission belt (21), and the second driving mechanism (3) is used to drive the abutment blocks (142) to slide, and when the abutment blocks (142) slide to a limit position toward a side away from the liquid tank (11), the scraper block (14) slides until it abuts against the inner wall of the liquid tank (11); The second driving mechanism (3) comprises a plurality of connecting blocks (31) and a plurality of hydraulic cylinders (33). The plurality of connecting blocks (31) are respectively connected to the casing body (1) in a sliding manner along a transmission direction perpendicular to the transmission belt (21). The plurality of connecting blocks (31) are respectively provided with a slide groove (32). The plurality of abutment blocks (142) are respectively connected to the slide groove (32) in a sliding manner along the transmission direction of the transmission belt (21). The plurality of hydraulic cylinders (33) are respectively fixedly connected to the casing body (1). The plurality of hydraulic cylinders (33) correspond to the plurality of connecting blocks (31). One end of the piston rod of the plurality of hydraulic cylinders (33) is respectively fixedly connected to the corresponding connecting block (31). When the plurality of connecting blocks (31) slide toward one side of the liquid tank (11) to an extreme position, the plurality of slide grooves (32) are connected.

2. A laser additive and subtractive composite device according to claim 1, characterized in that: The driving source (22) comprises a synchronous belt (221) and a first gear (222); the synchronous belt (221) is fixedly connected to the transmission belt (21); the first gear (222) is rotatably connected to the housing body (1); and the first gear (222) is meshedly connected to the synchronous belt (221).

3. A laser additive and subtractive composite device according to claim 2, characterized in that: The invention also comprises a lifting mechanism (4), wherein the lifting mechanism (4) is used for driving the sliding of the molding platform (12), and the lifting mechanism (4) comprises a threaded rod (41), a second gear (42) and a first motor (43), wherein the threaded rod (41) is fixedly connected to the molding platform (12), the second gear (42) is rotatably connected to the casing body (1) along the rotation direction of the molding platform (12), the threaded rod (41) is passed through and threadedly connected to the second gear (42), the first motor (43) is fixedly connected to the casing body (1), and one end of the output shaft of the first motor (43) is coaxially and fixedly connected to a third gear (44), and the third gear (44) and the first gear (222) are respectively meshed with the second gear (42).

4. The laser additive and subtractive composite device according to claim 1, characterized in that: It also includes a vacuum device (144), which is fixedly connected to the casing body (1), and a plurality of the scraping blocks (14) are respectively provided with air suction ports (143), and the plurality of air suction ports (143) are respectively connected to the vacuum device (144) via vacuum pumping tubes (145), and the other end of the vacuum pumping tube (145) is connected to the liquid tank (11).

5. The laser additive and subtractive composite device according to claim 4, characterized in that: The outer surface of the scraper block (14) is a file tooth surface, and when the scraper block (14) scrapes the surface of the molded product, the file tooth surface abuts against the molded product.

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