A 3D printing light-curing molding device for preparing thermal insulation coating

Abstract

The present invention relates to the technical field of 3D printers, and in particular to a 3D printing photocuring molding device for preparing a thermal insulation coating, comprising a wire feeding mechanism, a mechanical arm mechanism, a machine head, a wire-spinning mechanism and a driving mechanism, wherein the machine head is mounted on the discharge end of the mechanical arm mechanism to feed hot-melt material to the wire-spinning mechanism on the machine head, the wire-spinning mechanism comprising a U-shaped clamping seat fixed on the machine head and a discharge pipe installed in the U-shaped clamping seat, the wire-spinning mechanism also comprising ultraviolet light sources arranged on both sides of the discharge pipe, the light spots of the two ultraviolet light sources facing the discharge port of the discharge pipe, a swivel seat is provided on the machine head, and when the swivel seat turns to a certain side again with the connection between the swivel seat and the metal wire, the above-mentioned action is repeated again, thereby achieving the purpose of discharging material from the discharge pipe side, and the ultraviolet light source implements circumferential and radial irradiation on the hot-melt material near the discharge port, so as to further improve the material curing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printers, and in particular to a 3D printing light-curing molding device for preparing a thermal insulation coating. Background Art

[0002] The technicians first design the target shape in the 3D software, then transfer the target shape to the 3D printer, and then place the hot-melt material in the wire feeding mechanism. The 3D printer heats the hot-melt material (resin, rubber, ceramic, etc.) through the nozzle according to the input drawing and sprays it out to obtain the product. Therefore, the 3D printer is composed of a wire feeding mechanism, a multi-axis robotic arm, a work platform, a servo control system, a data terminal, etc. Compared with general product molding equipment, 3D printers do not generate waste when making products, and under the control of a multi-axis robotic arm, they can produce special-shaped products, which not only improves printing efficiency but also reduces mold costs.

[0003] The existing 3D printing head has a short curing time because the hot-melt material is directly ejected from the nozzle after being melted by the hot end inside. As the subsequent hot-melt material (which becomes fluid after hot melting) continues to melt and accumulate, the resulting weight gain effect will cause the underlying material to shorten and deform, affecting the product accuracy. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a 3D printing photocuring molding device for preparing a thermal insulation coating, comprising a wire feeding mechanism, a mechanical arm mechanism, a machine head, a wire-spinning mechanism and a driving mechanism, wherein the machine head is mounted on the discharge end of the mechanical arm mechanism, and the mechanical arm mechanism is mounted on the wire feeding mechanism to transport hot-melt material to the wire-spinning mechanism on the machine head, the wire-spinning mechanism comprises a U-shaped clamping seat fixed on the machine head and a discharge pipe installed in the U-shaped clamping seat, the wire-spinning mechanism also comprises an ultraviolet light source arranged on both sides of the discharge pipe, and the light spots of the two ultraviolet light sources are facing the discharge port of the discharge pipe, a swivel seat is provided on the machine head, and the driving mechanism comprises a connecting rod hinged on the two ultraviolet light sources, and the other ends of the two connecting rods are connected to the swivel seat, and the swivel seat drives the two connecting rods to drive the two ultraviolet light sources to move relative to the periphery of the discharge pipe respectively. The push plate is a bent plate that bends forward, and a first set of holes is respectively provided on both ends of the push plate. The two first sets of holes are respectively sleeved on the two ultraviolet light sources. A second set of holes is provided in the middle of the push plate, and the second set of holes is sleeved on the discharge pipe. The drive mechanism also includes a bending spring connected between the ultraviolet light sources, and the bending spring is bent toward the discharge port of the discharge pipe. The bending spring and the push plate have the same bending degree, and under the bending action of the two ends of the bending spring, the light-emitting ends of the two ultraviolet light sources are tilted toward the direction of the discharge pipe. The drive mechanism also includes a stepper motor fixed on the machine head and rotated by the gear structure of the swivel seat. The drive mechanism also includes a push sleeve sleeved on the discharge pipe, and the push sleeve pushes the push plate to move linearly along the discharge pipe and the ultraviolet light source.

[0005] As a further preferred embodiment, the bending spring spans across the outer side of the discharge pipe, the two ultraviolet light sources are symmetrically arranged on both sides of the discharge pipe, and the two connecting rods are symmetrically connected to the two ultraviolet light sources.

[0006] As further preferred, the ultraviolet light source is fixed to a clamping block, the first hole is sleeved on the clamping block, the connecting end of the connecting rod and the ultraviolet light source is connected to the clamping block, and the connecting rod is a flexible rubber rod.

[0007] As a further preferred embodiment, the opposite ends of the two first sets of holes are slidably matched with the opposite surfaces of the two clamping blocks, and the back-to-back ends of the two first sets of holes are provided with openings.

[0008] As a further preferred embodiment, locking screws are installed at the front and rear ends of the clamping block, the top ends of the locking screws protrude on the top surface of the clamping block, and the top ends of the front and rear locking screws are symmetrically located on both sides of the end of the push plate.

[0009] As a further preferred embodiment, an assembly hole is provided on the machine head, the stepper motor is fixed in the machine head, the gear structure includes a driving gear fixed on the stepper motor and located in the assembly hole, the swivel seat is annular, and the gear structure also includes a driven gear arranged on the inner circular surface of the swivel seat, and the driving gear is meshed with the driven gear.

[0010] As a further preferred embodiment, the push sleeve is located at the front side of the push plate, and the driving mechanism also includes a metal wire, which passes through the second sleeve hole, one end of the metal wire is rearwardly connected to the swivel seat, and the other end of the metal wire is forwardly connected to the push sleeve, when the swivel seat rotates forward and reversely, the push sleeve is dragged by the metal wire to move back and forth on the discharge pipe, and the discharge pipe is also provided with a support spring at both ends elastically supported between the rear of the push plate and the front end of the U-shaped clamping seat, when the push sleeve moves back and forth, it pushes the push plate to move back and forth, and at the same time the support spring is compressed to shorten or elastically lengthened.

[0011] As a further preferred embodiment, a column is fixed on the U-shaped clamping seat, a guide hole is opened on the column, the metal wire passes through the guide hole, and the guide hole and the second set of holes are filled with a rubber sleeve to prevent the metal wire from being broken.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. Two connecting rods drive two UV light sources to rotate back and forth near the discharge port. The back and forth rotation angle of the stepper motor is set at 180 degrees, so the rotation angle of the two UV light sources is also 180 degrees. The common rotation angle of the two UV light sources is 180 degrees. The two UV light sources rotate back and forth toward the discharge port, so that all the hot-melt materials discharged from the discharge port are irradiated, which improves the curing efficiency and quality.

[0014] 2. When the push plate is pushed backward, the clamping block on the left is forced to deviate to the left, and the clamping block on the right is forced to deviate to the right. The bending spring between the two clamping blocks is elastically stretched. When the two clamping blocks are deviated as described above, it is equivalent to adjusting the distance between the two ultraviolet light sources relative to the discharge port of the discharge pipe. When the hot melt material is discharged in a semi-fluid or fluid state, in addition to adjusting the ultraviolet light source in the circumferential direction to increase the irradiation angle and assist the material to solidify quickly at multiple angles, the ultraviolet light source is also adjusted in the radial direction to increase the irradiation area and assist the material to solidify quickly over a large range. On the contrary, when the swivel seat rotates with its connection with the metal wire to the front-back straight line, the tension on the metal wire is reduced, the support spring elastically lengthens, the front end is ejected forward, and the push sleeve pushes the push plate forward, the bending spring elastically restores its shape, the left end supports the clamping block on the left to the left, and the right end supports the clamping block on the right to the right. When the swivel seat turns to one side again with the connection between it and the metal wire, the above action is repeated again, so that the material is discharged from the side of the discharge pipe. The ultraviolet light source implements circumferential and radial irradiation on the hot-melt material near the discharge port, thereby improving the purpose of material curing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a 3D printing photocuring device for preparing a thermal insulation coating provided by an embodiment of the present invention from a first viewing angle;

[0016] Figure 2 A 3D printing light-curing molding device for preparing a thermal insulation coating provided in an embodiment of the present invention comprises Figure 1 The enlarged schematic diagram of the A part is shown;

[0017] Figure 3 A schematic diagram of a 3D printing photocuring device for preparing a thermal insulation coating provided by an embodiment of the present invention under a second viewing angle;

[0018] Figure 4 A 3D printing light-curing molding device for preparing a thermal insulation coating provided in an embodiment of the present invention comprises Figure 3 The enlarged schematic diagram of the B part is shown;

[0019] Figure 5 A schematic diagram of a 3D printing photocuring device for preparing a thermal insulation coating provided in an embodiment of the present invention from a third viewing angle;

[0020] Figure 6 A 3D printing light-curing molding device for preparing a thermal insulation coating provided in an embodiment of the present invention comprises Figure 5 The enlarged schematic diagram of the C part is shown;

[0021] Figure 7 A schematic diagram of a 3D printing photocuring molding device for preparing a thermal insulation coating provided in an embodiment of the present invention, viewed from the front side of the machine head only.

[0022] In the figure: 1. wire feeding mechanism; 2. mechanical arm mechanism; 3. machine head; 5. wire-spinning mechanism; 6. driving mechanism; 7. U-shaped clamping seat; 8. discharge pipe; 9. ultraviolet light source; 10. swivel seat; 11. connecting rod; 12. bending spring; 13. push plate; 14. first set of holes; 15. second set of holes; 16. stepping motor; 17. clamping block; 18. push sleeve; 19. locking screw; 20. assembly hole; 21. driving gear; 22. driven gear; 23. metal wire; 24. support spring; 25. column; 26. guide hole. DETAILED DESCRIPTION

[0023] The above and other embodiments and advantages of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0024] In one embodiment, Figure 1-Figure 7 As shown:

[0025] The present embodiment provides a 3D printing photocuring molding device for preparing a thermal insulation coating, comprising a wire feeding mechanism 1, a mechanical arm mechanism 2, a machine head 3, a wire laying mechanism 5 and a driving mechanism 6. The machine head 3 is mounted on the discharge end of the mechanical arm mechanism 2, and the mechanical arm mechanism 2 is mounted on the wire feeding mechanism 1. The wire feeding mechanism 1 is used to convey hot-melt material to the wire laying mechanism 5 on the machine head 3. The mechanical arm mechanism 2 moves the machine head 3 in multiple dimensions on the working platform under the control of the processing trajectory. The wire laying mechanism 5 comprises a U-shaped clamping seat 7 fixed on the machine head 3 and a discharge pipe 8 installed in the U-shaped clamping seat 7. The wire laying mechanism 5 receives the hot-melt material conveyed by the wire feeding mechanism 1 and conveys the hot-melt material to the working table through the discharge pipe 8. The wire laying mechanism 5 also comprises ultraviolet light sources 9 arranged on both sides of the discharge pipe 8, and the light spots of the two ultraviolet light sources 9 are oriented toward the discharge port of the discharge pipe 8. A swivel seat 10 is provided on the machine head 3. The driving mechanism 6 comprises a connecting rod 11 connected to the two ultraviolet light sources 9, and the other ends of the two connecting rods 11 are connected to the swivel seat 10. The seat 10 drives the two connecting rods 11 to drive the two ultraviolet light sources 9 to rotate 180 degrees relative to the periphery of the discharge pipe 8. The driving mechanism 6 also includes a push plate 13, which is a bent plate bent forward. A first set of holes 14 are respectively provided on both ends of the push plate 13. The two first sets of holes 14 are respectively sleeved on the two ultraviolet light sources 9. A second set of holes 15 is provided in the middle of the push plate 13. The second set of holes 15 is sleeved on the discharge pipe 8. The driving mechanism 6 also includes a push plate 13 connected between the ultraviolet light sources 9. The bending spring 12 is bent toward the discharge port of the discharge pipe 8. The bending degree of the bending spring 12 and the push plate 13 are consistent, and under the bending action of the two ends of the bending spring 12, the light-emitting ends of the two ultraviolet light sources 9 are inclined toward the discharge pipe 8. The driving mechanism 6 also includes a stepper motor 16 fixed on the machine head 3 and driving the rotating seat 10 to rotate through a gear structure. The driving mechanism 6 also includes a push sleeve 18 mounted on the discharge pipe 8, and the push sleeve 18 pushes the push plate 13 to move linearly along the discharge pipe 8 and the ultraviolet light source 9.

[0026] As a further preferred embodiment, the bending spring 12 spans the outer side of the discharge pipe 8 , the two ultraviolet light sources 9 are symmetrically disposed on both sides of the discharge pipe 8 , and the two connecting rods 11 are symmetrically connected to the two ultraviolet light sources 9 .

[0027] As a further preferred embodiment, the ultraviolet light source 9 is fixed to the clamping block 17 , the first set of holes 14 is sleeved on the clamping block 17 , the connecting end of the connecting rod 11 and the ultraviolet light source 9 is connected to the clamping block 17 , and the connecting rod 11 is a flexible rubber rod.

[0028] As a further preferred embodiment, the opposite ends of the two first sets of holes 14 are slidably matched with the opposite surfaces of the two clamping blocks 17 , and the opposite ends of the two first sets of holes 14 are provided with openings.

[0029] As a further preferred embodiment, locking screws 19 are installed at the front and rear ends of the clamping block 17 , and the top ends of the locking screws 19 protrude on the top surface of the clamping block 17 , and the top ends of the front and rear locking screws 19 protrude symmetrically on both sides of the end of the push plate 13 .

[0030] As a further preferred embodiment, an assembly hole 20 is opened on the machine head 3, the stepper motor 16 is fixed in the machine head 3, the gear structure includes a driving gear 21 fixed on the stepper motor 16 and located in the assembly hole 20, the swivel seat 10 is annular, and the gear structure also includes a driven gear 22 arranged on the inner circular surface of the swivel seat 10, and the driving gear 21 is meshed with the driven gear 22.

[0031] As a further preferred embodiment, the push sleeve 18 is located on the front side of the push plate 13, and the driving mechanism 6 also includes a metal wire 23, which passes through the second set of holes 15. One end of the metal wire 23 is connected to the swivel seat 10 backward, and the other end of the metal wire 23 is connected to the push sleeve 18 forward. When the swivel seat 10 rotates forward and reverse, the push sleeve 18 is dragged to move back and forth on the discharge pipe 8 by the metal wire 23. The discharge pipe 8 is also provided with a support spring 24 at both ends elastically supported between the rear of the push plate 13 and the front end of the U-shaped clamping seat 7. When the push sleeve 18 moves forward and backward, it pushes the push plate 13 to move forward and backward, and at the same time, the support spring 24 is compressed to shorten or elastically lengthen.

[0032] In this embodiment, the working principle is as follows: the robot arm mechanism 2 moves in space on the workbench according to the printing trajectory, and according to the printing trajectory, the hot-melt material photosensitive resin is heated into a fluid through the thermal resistance in the head 3 and then falls onto the workbench through the discharge pipe 8. At the same time, two ultraviolet light sources 9 are aimed at the hot-melt material (which becomes a fluid at this time) to irradiate ultraviolet rays, which accelerates the curing efficiency of the hot-melt material, thereby accelerating the molding speed of the product. From the above, it can be seen that once the hot-melt material falls on the workbench in a fluid state, it can be accelerated to cure under ultraviolet irradiation. Therefore, when the subsequent fluid material falls on the bottom solidified material, the bottom solidified material will not be deformed due to the subsequent fluid weighting, and the overall quality of the product is improved after molding.

[0033] In connection with the above, when the ultraviolet light source 9 is working, the stepper motor 16 is energized and drives the driving gear 21 to rotate back and forth in a clockwise and counterclockwise switching manner, the driving gear 21 drives the driven gear 22 to rotate back and forth, the driven gear 22 drives the rotating seat 10 to rotate back and forth, the rotating seat 10 drives the two connecting rods 11 to rotate back and forth, and the two connecting rods 11 drive the two ultraviolet light sources 9 to rotate back and forth near the discharge port. The back-and-forth rotation angle of the stepper motor 16 is set at 180 degrees, so the rotation angle of the two ultraviolet light sources 9 is also 180 degrees, and the common rotation angle of the two ultraviolet light sources 9 is 360 degrees. The two ultraviolet light sources 9 rotate back and forth toward the discharge port, so that the hot-melt material discharged from the discharge port is fully irradiated, thereby improving the curing efficiency and quality.

[0034] Continuing from the above, the driving gear 21 meshes with the driven gear 22, and when the driven gear 22 drives the rotating seat 10 to rotate clockwise or counterclockwise, the wire 23 will be frequently dragged or relaxed. When the rotating seat 10 drives the connection between it and the wire 23 in the counterclockwise direction, the wire 23 will be dragged and gradually tightened. At this time, the other end of the wire 23 drags the push sleeve 18, and the push sleeve 18 pushes the push plate 13. The two ends of the push plate 13 slide backward along the two clamping blocks 17 through the first set of holes 14. At this time, the support spring 24 is compressed and shortened and stores elastic force. Since the push plate 13 is a bent plate bent forward, the two clamping blocks 17 gradually tilt forward and downward, so the push plate 13 is When pushed backward, the left clamp 17 will be forced to deviate to the left, and the right clamp 17 will be forced to deviate to the right. At this time, the bending spring 12 is elastically stretched. Since the left ultraviolet light source 9 is installed on the left clamp 17, and the right ultraviolet light source 9 is installed on the right clamp 17, when the two clamps 17 are offset as mentioned above, it is equivalent to adjusting the distance between the two ultraviolet light sources 9 and the discharge port of the discharge pipe 8. When the hot-melt material is discharged in a semi-fluid or fluid state, in addition to the ultraviolet light source 9 being adjusted in the circumferential direction to increase the irradiation angle and assist the material to solidify quickly at multiple angles, the ultraviolet light source 9 is also adjusted in the radial direction to increase the irradiation area and assist the material to solidify quickly over a large range.

[0035] On the contrary, when the rotating seat 10 rotates with the connection between it and the metal wire 23 to the front-back straight line, the pulling force on the metal wire 23 is reduced, the support spring 24 elastically lengthens, the front end is ejected forward, and the push sleeve 18 pushes the push plate 13 forward, the bending spring 12 elastically restores its shape, the left end supports the left clamping block 17 to the left, and the right end supports the right clamping block 17 to the right. When the rotating seat 10 rotates with the connection between it and the metal wire 23 to one side again, the above action is repeated again, so that the material discharge tube 8 discharges the material, and the ultraviolet light source 9 irradiates the hot melt material in the circumferential and radial directions near the discharge port, so as to further improve the material curing efficiency.

[0036] like Figure 7 As shown, a column 25 is fixed on the U-shaped clamping seat 7, and a guide hole 26 is opened on the column 25. The metal wire 23 passes through the guide hole 26. The guide hole 26 and the second set of holes 15 are filled with a rubber sleeve to prevent the metal wire 23 from being broken. The setting of the column 25 is used to guide the metal wire 23, and when the rotating seat 10 rotates 180 degrees left and right, it is ensured that the metal wire 23 has a dragging effect.

[0037] The above orientation designations do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme, and the orientations are described relatively with reference to the figures. In essence, the specific orientations of the components are described according to their actual installation and actual use as well as the customary orientations of technicians in this field. This is hereby explained.

[0038] The specific implementation methods described above further describe the invention purpose, technical solutions, and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the protection scope of the present invention. It is particularly pointed out that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A 3D printing light-curing molding device for preparing a thermal insulation coating, characterized in that: The invention comprises a wire feeding mechanism (1), a mechanical arm mechanism (2), a machine head (3), a wire laying mechanism (5) and a driving mechanism (6), wherein the machine head (3) is mounted on the material discharge end of the mechanical arm mechanism (2), and the mechanical arm mechanism (2) is mounted on the wire feeding mechanism (1) for conveying hot-melt material to the wire laying mechanism (5) on the machine head (3); The spinning mechanism (5) comprises a U-shaped clamping seat (7) fixed on the machine head (3) and a discharge pipe (8) installed in the U-shaped clamping seat (7), and the spinning mechanism (5) also comprises ultraviolet light sources (9) arranged on both sides of the discharge pipe (8), and the light spots of the two ultraviolet light sources (9) are directed toward the discharge port of the discharge pipe (8), and a rotating seat (10) is provided on the machine head (3); The driving mechanism (6) comprises a connecting rod (11) hinged on the two ultraviolet light sources (9), the other ends of the two connecting rods (11) are connected to the rotating seat (10), and the two connecting rods (11) are driven by the rotating seat (10) to respectively drive the two ultraviolet light sources (9) to rotate 180 degrees along the circumference of the discharge pipe (8). The driving mechanism (6) also comprises a push plate (13), the two ends of the push plate (13) are bent toward the discharge port of the discharge pipe (8), the two ends of the push plate (13) are respectively provided with a first set of holes (14), the two first sets of holes (14) are respectively sleeved on the two ultraviolet light sources (9), the middle position of the push plate (13) is provided with a second set of holes (15), the second set of holes (15) is sleeved on the discharge pipe (8), The driving mechanism (6) further comprises a bending spring (12) connected between the ultraviolet light sources (9), the two ends of the bending spring (12) being bent toward the discharge port of the discharge pipe (8), the bending degree of the bending spring (12) being consistent with that of the push plate (13), and under the bending action of the two ends of the bending spring (12), the light-emitting ends of the two ultraviolet light sources (9) are both tilted toward the direction of the discharge pipe (8), the driving mechanism (6) further comprises a stepping motor (16) fixed to the machine head (3) and driving the rotating seat (10) to rotate through a gear structure, and the driving mechanism (6) further comprises a push sleeve (18) sleeved on the discharge pipe (8), the push sleeve (18) pushing the push plate (13) to move linearly along the discharge pipe (8) and the ultraviolet light source (9).

2. A 3D printing light-curing molding device for preparing a thermal insulation coating according to claim 1, characterized in that: The bending spring (12) spans the outer side of the discharge pipe (8), the two ultraviolet light sources (9) are symmetrically arranged on both sides of the discharge pipe (8), and the two connecting rods (11) are respectively connected to the two ultraviolet light sources (9).

3. A 3D printing light-curing molding device for preparing a thermal insulation coating according to claim 2, characterized in that: The ultraviolet light source (9) is fixed on a clamping block (17), the first set of holes (14) is sleeved on the clamping block (17), and the connecting end of the connecting rod (11) and the ultraviolet light source (9) is connected to the clamping block (17).

4. A 3D printing light-curing molding device for preparing a thermal insulation coating according to claim 3, characterized in that: The connecting rod (11) is a flexible rubber rod.

5. A 3D printing light-curing molding device for preparing a thermal insulation coating according to claim 4, characterized in that: The opposite ends of the two first sets of holes (14) are slidably matched with the opposite surfaces of the two clamping blocks (17), and the back-to-back ends of the two first sets of holes (14) are provided with openings.

6. A 3D printing light-curing molding device for preparing a thermal insulation coating according to claim 5, characterized in that: Locking screws (19) are installed at the front and rear ends of the clamping block (17), and the top end of the locking screw (19) protrudes on the top surface of the clamping block (17). The top ends of the front and rear locking screws (19) are symmetrically arranged on both sides of the end of the push plate (13).

7. A 3D printing light-curing molding device for preparing a thermal insulation coating according to claim 6, characterized in that: The machine head (3) is provided with an assembly hole (20), the stepping motor (16) is fixed in the machine head (3), the gear structure comprises a driving gear (21) fixed on the stepping motor (16) and located in the assembly hole (20), the rotating seat (10) is annular, and the gear structure further comprises a driven gear (22) arranged on the inner circumferential surface of the rotating seat (10), and the driving gear (21) is meshed with the driven gear (22).

8. The 3D printing light-curing molding device for preparing a thermal insulation coating according to claim 7, characterized in that: The push sleeve (18) is located at the front side of the push plate (13), and the driving mechanism (6) also includes a metal wire (23), the metal wire (23) passes through the second sleeve hole (15), one end of the metal wire (23) is connected to the rotating seat (10) backward, and the other end of the metal wire (23) is connected to the push sleeve (18) forward. When the rotating seat (10) rotates forward and reverse, the push sleeve (18) is dragged by the metal wire (23) to move forward and backward on the discharge pipe (8), and the discharge pipe (8) is also sleeved with a support spring (24) with two ends elastically supported between the rear of the push plate (13) and the front end of the U-shaped clamping seat (7). When the push sleeve (18) moves forward and backward, it pushes the push plate (13) to move forward and backward, and at the same time makes the support spring (24) shorten or lengthen.

9. The 3D printing light-curing molding device for preparing a thermal insulation coating according to claim 8, characterized in that: A column (25) is fixed on the U-shaped clamping seat (7), a guide hole (26) is formed on the column (25), the metal wire (23) passes through the guide hole (26), and the guide hole (26) and the second sleeve hole (15) are filled with a rubber sleeve to prevent the metal wire (23) from being broken.

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