3D printer with stripping function

Abstract

The invention belongs to the technical field of 3D printers, particularly relates to a 3D printer with a stripping function, and provides the following scheme aiming at the problems that the bottom of a workpiece is excessively melted and scalds are easily caused when a tray is constructed through heating to realize stripping: the 3D printer comprises a printer base; two rows of longitudinal sliding holes parallel to each other in the horizontal Y-axis direction are formed in the upper surface of the printer base, supporting guide strips are slidably connected into the two longitudinal sliding holes, and the same construction tray is fixed to the top ends of the two supporting guide strips. A portal frame is further arranged above the rear side of the printer base, and a printing head capable of moving in a two-dimensional mode in the vertical plane is arranged on the front face of the portal frame. After printing is finished, the sliding cushion blocks on the two sides are removed while the cylindrical ejector blocks are controlled to conduct rapid heating and stripping, at the moment, all the cylindrical ejector blocks can automatically continue to conduct upward ejection so that a printed piece can be ejected up to complete rapid stripping, rapid retraction is conducted after stripping is finished, and scalding is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printers, and in particular to a 3D printer with a material stripping function. Background Art

[0002] 3D printing is usually achieved by using digital technology in combination with material printers. It is often used to make models in fields such as mold manufacturing and industrial design, and later gradually used for the direct manufacturing of some products. There are already parts printed using this technology. During the printing process, 3D printers usually print 3D printed parts on a build tray, and then soften the bottom of the 3D printed part by heating the tray to remove it from the tray.

[0003] After searching, we found that the existing heating tray discharge method is not only slow, but also easily causes the bottom of the product to be over-melted due to inaccurate heating temperature regulation. In addition, the heated build tray is prone to scalding accidents when removing materials. Therefore, in order to solve the technical problem of using a heated build tray to realize material removal, which not only easily causes the bottom of the workpiece to be over-melted but also easily causes scalding, we proposed a new type of 3D printer with material removal function. Summary of the Invention

[0004] To solve the technical problem that heating the build tray to realize material removal not only easily causes excessive melting of the bottom of the workpiece but also easily causes burns, the present invention adopts the following technical solutions:

[0005] A 3D printer with a stripping function comprises a printer base, wherein the upper surface of the printer base is provided with two rows of longitudinal sliding holes parallel to each other in the horizontal Y-axis direction, the two longitudinal sliding holes are slidably connected to support guide bars, and the top ends of the two support guide bars are fixed with the same building tray; a gantry is also provided on the upper rear side of the printer base, and a print head capable of two-dimensional movement in the vertical plane is provided on the front side of the gantry, a control screen is fixed on the side of the printer base, the building tray comprises an outer shell frame, a rectangular raised area is reserved in the middle of the upper surface of the outer shell frame, and a plurality of auxiliary inlet rings are reserved below the rectangular raised area; the bottom of the outer shell frame is located below the rectangular raised area and is embedded with three sliding bearings distributed symmetrically in the center, and the three sliding bearings are slidably connected to vertical guide rods, the top ends of the three guide rods are fixed with the same fender, and the top ends of the fenders are fixed with a connecting plate, The upper surface of the connecting plate is fixed with a columnar top block that is adapted to the inner diameter of the auxiliary inlet ring; the lower surface of the top plate of the outer shell frame is provided with sliding pads that are symmetrical to each other on both sides of the fender; and the lower surface of the fender is provided with an ejection mechanism; a heating mechanism is provided inside the connecting plate and the columnar top block; by providing a columnar top block and a connecting plate at its bottom end that can be hidden and slidably connected in the auxiliary inlet ring, when performing 3D printing, it is only necessary to push the sliding pads on both sides between the fender and the top plate of the outer shell frame, and then push the columnar top block up so that the top of the columnar top block is flush with the surface of the raised area on the upper surface of the outer shell frame, and printing can be performed; after printing is completed, the columnar top block is controlled to heat and dematerial quickly, and then the sliding pads on both sides are removed. At this time, all the columnar top blocks will automatically continue to push up to lift the printed part to complete the rapid dematerialing, and retract quickly after the dematerialing is completed to prevent burns.

[0006] Furthermore, mutually symmetrical electrically controlled positioning pins are fixed on both sides of the fender on the lower surface of the top plate of the outer shell frame, and the ends of the extending shafts of the electrically controlled positioning pins are fixed to the rear ends of the corresponding sliding pads.

[0007] Furthermore, the thickness of the sliding pad plus the thickness of the top plate of the outer shell frame is equal to the height of the columnar top block, and a 45-degree chamfer is provided at the edge of the upper surface of the sliding pad close to the fender, so as to facilitate smooth insertion above the fender, play a leveling role, and ensure that the top of the columnar top block does not protrude during printing.

[0008] Furthermore, a rectangular hole is opened in the middle of the lower surface of the outer shell frame, and the ejection mechanism is arranged in the rectangular hole, and the ejection mechanism includes a shaft rod frame fixed to the lower surface of the outer shell frame near the end of the rectangular hole, and a transmission rod horizontally extending to the middle of the rectangular hole is rotatably connected in the shaft rod frame, and a rotating wheel is fixed to one end of the transmission rod near the rectangular hole, and a short shaft rod is fixed near the circumferential edge of the end of the rotating wheel away from the transmission rod, and a connecting rod is rotatably sleeved on the outer wall of the short shaft rod, and a movable shaft is inserted into the side surface of the other end of the connecting rod, and a hinge block is rotatably sleeved on the circumferential outer wall of the movable shaft, and a telescopic rod is fixed between the surface of the hinge block and the lower surface of the fender, and the telescopic rod includes an outer tube tube with an upward opening, and an inner ejector is slidably connected at the top tube mouth of the outer tube tube Rod, a compression spring 2 is fixed between the bottom end of the inner push rod and the bottom inner wall of the outer tube; a worm gear is fixed to the end of the transmission rod away from the rectangular hole, and a motor seat is fixed to the side of the lower surface of the outer shell frame close to the worm gear, and a reduction motor is fixed to the lower surface of the motor seat by bolts, and a worm that meshes with the worm gear is fixed to the top of the output shaft of the reduction motor through a coupling; when in use, it is only necessary to control the reduction motor to drive the worm gear to rotate forward and reverse 180 degrees to realize the state of the columnar top block completing unloading, printing and hiding; and when the printing is completed and the material needs to be removed, it is only necessary to remove the sliding pads on both sides, and the columnar top block will automatically continue to be pushed up under the action of the compression spring 2 in the telescopic rod.

[0009] Furthermore, an extension protrusion is fixed to the end of the movable shaft away from the rotating wheel, a return spring is fixed to the end of the extension protrusion away from the movable shaft, and a touch ball is fixed to the end of the return spring away from the movable shaft; a fixed vertical bar is fixedly inserted near the touch ball at the bottom of the outer shell frame, and cantilever rods extending to the upper and lower positions of the touch ball are respectively fixed on the two ends of the fixed vertical bar near the touch ball, and pressure sensors are respectively fixed on the opposite sides of the two cantilever rods; the pressure sensor is connected to the controller via a signal line, and the signal output end of the controller is connected to the control end of the reduction motor; the two pressure sensors are respectively located directly above and below the touch ball; by setting an electrically controlled positioning pin connected to the sliding pad, before printing, when it is necessary to control the top of the columnar top block to be flush with the top of the outer shell frame, the sliding pad can be inserted into the gap between the upper surface of the fender and the lower surface of the top plate of the outer shell frame by simply starting the two electrically controlled positioning pins.

[0010] Furthermore, the front of the outer shell frame is provided with heat dissipation holes near both ends, and a heat dissipation fan is fixed on the rear side of the outer shell frame near the opening. Through the provided heat dissipation holes and the heat dissipation fan, the retracted columnar top block can be quickly cooled and dissipated after heating and stripping.

[0011] Furthermore, the circumferential outer wall of the cylindrical top block and the circumferential inner wall of the auxiliary inlet ring form a gap fit, and the outer wall of the cylindrical top block and the circumferential inner wall of the auxiliary inlet ring are polished; this can prevent the gap from being too large to cause leakage during printing.

[0012] Furthermore, a roller mounting hole is provided on the lower surface of the outer shell frame near the front of the device. The roller mounting hole is an overall long strip structure, and the length direction of the roller mounting hole is perpendicular to the length direction of the outer shell frame. Bearing mounting holes are provided at both ends of the roller mounting hole, and bearing seats are embedded and fixed in the two bearing mounting holes. The two bearing seats are respectively clamped with mutually symmetrical tapered roller bearings, and the same winding roller is rotatably connected between the inner rings of the two tapered roller bearings. An annular groove is provided on the circumferential outer wall of the winding roller near the middle, and a sponge sleeve with an overall tubular structure is sleeved in the annular groove, and the interior of the sponge sleeve absorbs lubricating oil to assist in material removal; and a servo motor is fixed to the end of the winding roller by bolts on the bottom inner wall of the outer shell frame near the end, and the top of the output shaft of the servo motor The connecting coupling is fixed to the shaft head end of the winding roller; an oiled cloth bag is wound and fixed on the circumferential outer wall of the winding roller, and the end of the oiled cloth bag away from the winding roller passes around the top circumferential outer wall of the winding roller horizontally through the lower surface of all auxiliary inlet rings and is fixed with a fixed clamping shaft; both ends of the fixed clamping shaft are fixed with mutually symmetrical anti-slip sliders, and the surfaces of the two anti-slip sliders away from the winding roller are fixed with a reset spring 1, and the ends of the two reset springs away from the anti-slip sliders are fixed with a spring stopper, and the spring stopper is fixed on the lower surface of the top plate of the outer shell frame near the port; the width of the oiled cloth bag is greater than the width of the connecting plate and less than the distance between the two sliding pads; the end of the oiled cloth bag close to the fixed clamping shaft is provided with a through hole, and the through hole is used for all cylindrical top blocks to pass through.

[0013] Furthermore, the outer diameter of the sponge sleeve is larger than the maximum outer diameter of the winding roller, so that when the oiling bag is wound on the surface of the sponge sleeve during use, it can better adhere to the oil and achieve the effect of automatic oiling.

[0014] Furthermore, the lower surface of the top plate of the outer shell frame is fixed with symmetrical anti-slip rails on both sides of the reset spring, and the corresponding anti-slip sliders are slidably connected to the anti-slip rails, ensuring that the oiled cloth bag always maintains a constant height when stretched or reset, preventing collision and obstruction with the columnar top block due to sagging.

[0015] The beneficial effects of the present invention are:

[0016] 1. By setting a cylindrical top block and a connecting plate at its bottom that can be hidden and slidably connected in the auxiliary inlet ring, when performing 3D printing, it is only necessary to push the sliding pads on both sides between the fender and the top plate of the outer shell frame. At this time, push the cylindrical top block up just so that the top of the cylindrical top block is flush with the surface of the raised area on the upper surface of the outer shell frame, and then printing can be carried out; after printing is completed, control the cylindrical top block to heat and strip the material quickly, and then remove the sliding pads on both sides. At this time, all the cylindrical top blocks will automatically continue to push up to lift the printed part to complete the rapid stripping, and quickly retract after the stripping is completed to prevent burns.

[0017] 2. By setting up electric control positioning pins connected to the sliding pad, before printing, when it is necessary to control the top of the cylindrical top block to be flush with the top of the outer shell frame, you only need to activate the two electric control positioning pins to insert the sliding pad into the gap between the upper surface of the fender and the lower surface of the top plate of the outer shell frame.

[0018] 3. Through the two pressure sensors and the touch ball, when the reduction motor drives the telescopic rod on the rotating wheel to rotate to the top dead center and the bottom dead center, it can be controlled to stop in time to achieve the smooth arrival of several positions of the cylindrical top block.

[0019] 4. Through the oiling mechanism, when all the columnar top blocks are retracted, the oiling bag with the other end wrapped around the sponge sleeve is pulled out to apply oil to the top of the columnar top block. This is convenient for removing the material, and secondly for auxiliary cooling, and reduces the friction resistance with the inner hole of the auxiliary inlet ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a 3D printer with a material stripping function proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure of a build tray in a 3D printer with a stripping function proposed by the present invention;

[0022] Figure 3 This is a rear view of the build tray of a 3D printer with a stripping function proposed by the present invention before printing;

[0023] Figure 4 A 3D printer with a stripping function proposed by the present invention Figure 3 Schematic diagram of the cross-sectional structure along line AA;

[0024] Figure 5 This is a schematic diagram of the rear view structure of the build tray of a 3D printer with a stripping function proposed by the present invention after the oiling mechanism is removed during printing;

[0025] Figure 6A 3D printer with a stripping function proposed by the present invention Figure 5 Schematic diagram of the cross-sectional structure along line BB;

[0026] Figure 7 This is a schematic diagram of the overall structure of a build tray in a 3D printer with a stripping function proposed by the present invention, with the outer shell frame removed;

[0027] Figure 8 This is a schematic diagram of the assembly structure of an ejection mechanism in a 3D printer with a stripping function proposed by the present invention;

[0028] Figure 9 This is a schematic diagram of the upward structure of a 3D printer with a stripping function proposed by the present invention during oiling;

[0029] Figure 10 This is a structural schematic diagram of an oiling mechanism in a 3D printer with a material removal function proposed by the present invention.

[0030] Figure: 1. Printer base; 2. Housing frame; 201. Roller mounting hole; 202. Support guide bar; 203. Rectangular hole; 204. Auxiliary inlet ring; 3. Build tray; 4. Print head; 5. Gantry; 6. Heat dissipation hole; 7. Longitudinal slide hole; 8. Control panel; 9. Winding roller; 10. Oiled cloth bag; 1001. Through hole; 11. Motor base; 12. Shaft rod bracket; 13. Anti-slip slide rail; 14. Spring stopper; 15. Fixing clamp; 16. Fender; 17 , guide rod; 18, sponge sleeve; 19, electric control positioning pin; 20, servo motor; 21, bearing seat; 22, reset spring; 23, sliding bearing; 24, ejection mechanism; 25, transmission rod; 26, reduction motor; 27, cylindrical ejector block; 2701, connecting plate; 28, telescopic rod; 29, anti-slip slider; 30, reset spring 1; 31, fixed vertical bar; 32, pressure sensor; 33, sliding pad; 34, touch ball; 35, connecting rod; 36, movable shaft. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the present invention, reference is made to Figure 1-10A 3D printer with a stripping function includes a printer base 1. The upper surface of the printer base 1 is provided with two rows of longitudinal sliding holes 7 parallel to each other in the horizontal Y-axis direction. Support guide bars 202 are slidably connected to the two longitudinal sliding holes 7. A mechanism for driving the two support guide bars 202 to move back and forth in the horizontal Y-axis direction is provided below the support guide bars 202. The top of the two support guide bars 202 is fixed with the same building tray 3; a gantry 5 is further provided on the upper rear side of the printer base 1, and a print head 4 capable of two-dimensional movement in the vertical plane is provided on the front of the gantry 5. A control panel 8 is provided on the side of the printer base 1. The build tray 3 includes an outer shell frame 2 with an opening facing backward and a flat rectangular parallelepiped structure. A rectangular raised area is reserved in the middle of the upper surface of the outer shell frame 2, and a plurality of auxiliary entrance rings 204 are reserved below the rectangular raised area. The inner wall of the bottom end of the auxiliary entrance ring 204 has a rounded corner near the edge; the bottom of the outer shell frame 2 is located below the rectangular raised area and is embedded with three sliding bearings 23 distributed symmetrically in the center. The three sliding bearings 23 are all slidably connected to vertical guide rods 17. The top ends of the three guide rods 17 are fixed. The same fender 16 is fixed, and a connecting plate 2701 is fixed to the top of the fender 16. A cylindrical top block 27 that matches the inner diameter of the auxiliary inlet ring 204 is fixed on the upper surface of the connecting plate 2701; the lower surface of the top plate of the outer shell frame 2 is provided with symmetrical sliding pads 33 on both sides of the fender 16; and the lower surface of the fender 16 is provided with an ejection mechanism 24; a heating mechanism is provided inside the connecting plate 2701 and the cylindrical top block 27; by setting a cylindrical top block 27 that can be hidden and slidably connected to the auxiliary inlet ring 204 and the connection at its bottom Plate 2701, when performing 3D printing, it is only necessary to push the sliding pads 33 on both sides between the fender 16 and the top plate of the outer shell frame 2, and then push the columnar top block 27 up so that the top of the columnar top block 27 is flush with the surface of the raised area on the upper surface of the outer shell frame 2, and then printing can be carried out; after printing is completed, the columnar top block 27 is controlled to heat and remove the material quickly, and then the sliding pads 33 on both sides are removed. At this time, all the columnar top blocks 27 will automatically continue to push up to lift the printed part to complete the rapid removal of the material, and retract quickly after the removal of the material to prevent burns.

[0033] Please refer to Figure 5-Figure 6 The lower surface of the top plate of the outer shell frame 2 is located on both sides of the fender 16 and are fixed with symmetrical electric positioning pins 19, and the end of the extension axis of the electric positioning pin 19 is fixed to the rear end of the corresponding sliding pad 33; by setting the electric positioning pin 19 connected to the sliding pad 33, before printing, when it is necessary to control the top of the cylindrical top block 27 to be flush with the top of the outer shell frame 2, it is only necessary to start the two electric positioning pins 19 to insert the sliding pad 33 into the gap between the upper surface of the fender 16 and the lower surface of the top plate of the outer shell frame 2.

[0034] In the present invention, the thickness of the sliding pad 33 plus the thickness of the top plate of the outer shell frame 2 is equal to the height of the cylindrical top block 27, and the edge of the upper surface of the sliding pad 33 at one end close to the fender 16 is chamfered at 45 degrees to facilitate smooth insertion above the fender 16, playing a leveling role, and ensuring that the top of the cylindrical top block 27 does not protrude during printing.

[0035] Reference Figure 4-Figure 9 A rectangular hole 203 is opened in the middle of the lower surface of the outer shell frame 2, and the ejection mechanism 24 is arranged in the rectangular hole 203. The ejection mechanism 24 includes an axial rod frame 12 fixed to the lower surface of the outer shell frame 2 near the end of the rectangular hole 203. A transmission rod 25 extending horizontally to the middle of the rectangular hole 203 is rotatably connected in the axial rod frame 12. A rotating wheel is fixed to one end of the transmission rod 25 near the rectangular hole 203, and a short shaft rod is fixed near the circumferential edge of the end of the rotating wheel away from the transmission rod 25, and a connecting rod 35 is rotatably sleeved on the outer wall of the short shaft rod. A movable shaft 36 is inserted into the side of the other end of the connecting rod 35, and a hinge block is rotatably sleeved on the circumferential outer wall of the movable shaft 36. A telescopic rod 28 is fixed between the surface of the hinge block and the lower surface of the fender 16. The telescopic rod 28 includes an outer tube with an upward opening, and the top tube mouth of the outer tube is slidably connected There is an inner push rod, and a compression spring 2 is fixed between the bottom end of the inner push rod and the bottom inner wall of the outer tube; a worm gear is fixed to the end of the transmission rod 25 away from the rectangular hole 203, and a motor seat 11 is fixed to the side of the lower surface of the outer shell frame 2 close to the worm gear, and a reduction motor 26 is fixed to the lower surface of the motor seat 11 by bolts, and a worm that meshes with the worm gear is fixed to the top end of the output shaft of the reduction motor 26 through a coupling; through the provided ejection mechanism 24, when in use, it is only necessary to control the reduction motor 26 to drive the worm gear to rotate forward and reverse 180 degrees to realize the cylindrical top block 27 to complete the unloading, printing and hiding state; and when printing is completed and the material needs to be removed, it is only necessary to remove the sliding pads 33 on both sides, and the cylindrical top block 27 will be automatically pushed up under the action of the compression spring 2 in the telescopic rod 28.

[0036] Reference Figure 4 and Figure 8The cam 32 is connected to the control wheel 31 by the spring 32 and the control wheel 32 is connected to the control wheel 31 by the spring 32.

[0037] Reference Figure 1 and Figure 2 There are heat dissipation holes 6 on the front of the outer shell frame 2 near both ends, and a heat dissipation fan is fixed on the rear side of the outer shell frame 2 near the opening. Through the heat dissipation holes 6 and the heat dissipation fan, the retracted columnar top block 27 can be quickly cooled and dissipated after heating and stripping.

[0038] In the present invention, the circumferential outer wall of the cylindrical top block 27 and the circumferential inner wall of the auxiliary inlet ring 204 form a gap fit, and the outer wall of the cylindrical top block 27 and the circumferential inner wall of the auxiliary inlet ring 204 are polished; this can prevent the gap from being too large to cause leakage during printing.

[0039] Reference Figure 4 、 Figure 7 and Figure 10The lower surface of the outer shell frame 2 is provided with a roller mounting hole 201 near the front of the device. The roller mounting hole 201 is in an elongated structure as a whole, and the length direction of the roller mounting hole 201 is perpendicular to the length direction of the outer shell frame 2. Both ends of the roller mounting hole 201 are provided with bearing mounting holes, and the two bearing mounting holes are fixed with bearing seats 21. The two bearing seats 21 are respectively clamped with mutually symmetrical tapered roller bearings. The inner rings of the two tapered roller bearings are rotatably connected with the same winding roller 9. The outer wall of the circumference of the winding roller 9 is close to the inner ring of the two tapered roller bearings. An annular groove is opened in the middle, and a sponge sleeve 18 with an overall tubular structure is sleeved in the annular groove. The interior of the sponge sleeve 18 absorbs lubricating oil to assist in removing the material; and a servo motor 20 is fixed to the end of the bottom inner wall of the outer shell frame 2 near the winding roller 9 by bolts, and the top end of the output shaft of the servo motor 20 is fixed to the shaft head end of the winding roller 9 through a coupling; an oiled cloth bag 10 is wound and fixed on the circumferential outer wall of the winding roller 9, and the end of the oiled cloth bag 10 away from the winding roller 9 passes around the top circumferential outer wall of the winding roller 9 horizontally through all The lower surface of the auxiliary inlet ring 204 is fixed with a fixed card shaft 15; the two ends of the fixed card shaft 15 are respectively fixed with mutually symmetrical anti-slip sliders 29, and the surfaces of the two anti-slip sliders 29 away from the winding roller 9 are fixed with a reset spring 30, and the ends of the two reset springs 30 away from the anti-slip sliders 29 are fixed with a spring stopper 14, and the spring stopper 14 is fixed to the lower surface of the top plate of the outer shell frame 2 near the port; the width of the oiled cloth bag 10 is greater than the width of the connecting plate 2701 and smaller than the two sliding pads 33; the oiling bag 10 is provided with a through hole 1001 at one end near the fixed card shaft 15; the oiling bag 10 and the mechanism for controlling its operation constitute an oiling mechanism, and the through hole 1001 is used for all the columnar top blocks 27 to pass through, and when all the columnar top blocks 27 are retracted, the oiling bag 10 with the other end wrapped around the sponge sleeve 18 is pulled out to apply oil to the top of the columnar top block 27, which is convenient for removing the material, and secondly for assisting in cooling, and reducing the friction resistance with the inner hole of the auxiliary inlet ring 204.

[0040] Reference Figure 4 The outer diameter of the sponge sleeve 18 is larger than the maximum outer diameter of the winding roller 9, so that when the oiling bag 10 is wound on the surface of the sponge sleeve 18 during use, it can better stick to the oil and achieve the effect of automatic oiling.

[0041] Reference Figure 2 and Figure 4 The lower surface of the top plate of the outer shell frame 2 is located on both sides of the reset spring 30, and the anti-slip rails 13 are fixed symmetrically to each other, and the corresponding anti-slip sliders 29 are slidably connected to the anti-slip rails 13 to ensure that the oiled cloth bag 10 always maintains a constant height when stretching or resetting, and prevents the columnar top block 27 from causing collision and obstruction due to sagging.

[0042] Working principle: Before printing, the present invention first controls the ejection mechanism 24 to rotate the telescopic rod 28 to the bottom dead center, that is, at this time, the touch ball 34 is released from the pressure sensor 32 below. At this time, all the columnar top blocks 27 run to the bottom of the oiled cloth bag 10 and its through-hole 1001. At this time, the servo motor 20 is controlled to flip, and under the action of the two reset springs 30, the oiled cloth bag 10 coated with lubricating oil is pulled out and rubbed on the top of the columnar top block 27; after rubbing, it rotates back and retracts, and then controls the electric control positioning pins 1 on both sides. 9 is started to insert the two sliding pads 33 onto the top of the fender 16 to prepare for printing; then the ejection mechanism 24 is controlled to continue to operate until the top of the columnar top block 27 is pushed upwards until its top is flush with the surface of the raised area on the upper surface of the outer shell frame 2, and printing can be carried out; after printing is completed, the columnar top block 27 is controlled to heat and remove the material quickly, and then the sliding pads 33 on both sides are removed. At this time, all the columnar top blocks 27 will automatically continue to push up to lift the printed part to complete the rapid removal of the material, and will retract quickly after the removal of the material to prevent burns.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A 3D printer with a stripping function, comprising a printer base (1), wherein the upper surface of the printer base (1) is provided with two rows of longitudinal sliding holes (7) parallel to each other in the horizontal Y-axis direction, and the two longitudinal sliding holes (7) are both slidably connected with support guide bars (202), and the top ends of the two support guide bars (202) are fixed with the same building tray (3); a gantry (5) is further provided above the rear side of the printer base (1), and a print head (4) capable of two-dimensional movement in the vertical plane is provided on the front of the gantry (5), and a control screen (8) is fixed on the side of the printer base (1), characterized in that The building tray (3) comprises an outer shell frame (2), a rectangular raised area is reserved in the middle of the upper surface of the outer shell frame (2), and a plurality of auxiliary inlet rings (204) are reserved below the rectangular raised area.

2. A 3D printer with a stripping function according to claim 1, characterized in that: The bottom of the outer shell frame (2) is located below the rectangular raised area and is embedded with three sliding bearings (23) distributed symmetrically in the center, and the three sliding bearings (23) are all slidably connected to vertical guide rods (17), and the top ends of the three guide rods (17) are fixed with the same fender (16), and the top ends of the fender (16) are fixed with a connecting plate (2701), and the upper surface of the connecting plate (2701) is fixed with a cylindrical top block (27) that is adapted to the inner diameter of the auxiliary inlet ring (204).

3. A 3D printer with a stripping function according to claim 2, characterized in that: The lower surface of the top plate of the outer shell frame (2) is provided with symmetrical sliding pads (33) on both sides of the fender (16); and the lower surface of the fender (16) is provided with an ejection mechanism (24); and a heating mechanism is provided inside the connecting plate (2701) and the columnar top block (27).

4. A 3D printer with a stripping function according to claim 1, characterized in that: The lower surface of the top plate of the outer shell frame (2) is located on both sides of the fender (16) and is respectively fixed with mutually symmetrical electric control positioning pins (19), and the ends of the extension shafts of the electric control positioning pins (19) are fixed to the rear ends of the corresponding sliding pads (33).

5. The 3D printer with a stripping function according to claim 3, characterized in that: The thickness of the sliding pad (33) plus the thickness of the top plate of the outer shell frame (2) is equal to the height of the columnar top block (27), and a 45-degree chamfer is formed on the edge of the upper surface of one end of the sliding pad (33) close to the fender (16).

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