An ultra-high performance concrete 3D printer

Abstract

The present invention discloses an ultra-high performance concrete 3D printer, comprising a base, a drive box fixedly connected to the front of the base, a workbench fixedly connected to the middle of the top of the base, a moving mechanism provided in the drive box, a lifting mechanism provided on the left and right sides of the top of the base, a vibration mechanism provided in the middle of the front of the lifting mechanism, and a knocking mechanism provided on the top of the vibration mechanism. The moving mechanism comprises a first motor fixedly connected to the middle of the bottom of the drive box, a first motor having an output shaft, and a first pulley fixedly connected to the output shaft of the first motor. The present invention can generate impact force or high-frequency vibration through knocking or vibration, thereby loosening the concrete and making it easier to pass through the pipeline. The knocking or vibration can accelerate the flow of concrete, allowing it to pass through the supply pipeline more smoothly and avoid blockage. The knocking or vibration can also destroy the solidified layer of the concrete, making its composition more uniform, thereby improving the density and uniformity of the concrete.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete 3D printing equipment, and in particular to an ultra-high performance concrete 3D printer. Background Art

[0002] The concrete 3D printer is an advanced intelligent construction device used for fine-printing controllable and replicable building components. It is suitable for cement-based composite materials such as cement mortar, concrete, and geopolymers. The device integrates multidisciplinary technologies such as information technology, precision machinery, and materials science. It consists of a printer main frame, control system, mixing and conveying system, LCD display, and control software.

[0003] When a concrete 3D printer is working, concrete needs to be transported into the extruder head from an external feed pipe. However, when existing devices are transporting concrete, concrete accumulates in the feed pipe as the use time increases, making the feed pipe prone to blockage, which in turn makes the concrete 3D printer unable to work effectively. Improvements are needed to address this problem.

[0004] Therefore, it is necessary to design an ultra-high performance concrete 3D printer that is highly practical and ensures the efficiency of the device. Summary of the Invention

[0005] The purpose of the present invention is to provide an ultra-high performance concrete 3D printer to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an ultra-high performance concrete 3D printer, comprising a base, a drive box fixedly connected to the front of the base, a workbench fixedly connected to the middle of the top of the base, a moving mechanism provided in the drive box, lifting mechanisms provided on the left and right sides of the top of the base, a vibration mechanism provided in the middle of the front of the lifting mechanism, and a knocking mechanism provided on the top of the vibration mechanism.

[0007] Wherein, the moving mechanism includes:

[0008] Motor 1 is fixedly connected to the middle of the bottom of the drive box, and motor 1 has an output shaft, and the output shaft of motor 1 is fixedly connected to pulley 1, the outer surface of pulley 1 is connected to a belt, the inner side of the left end of the belt is connected to pulley 2, the middle part of pulley 2 is fixedly connected to a rotating rod, the rear end of the rotating rod is fixedly connected to screw 1, the middle part of the outer surface of screw 1 is threadedly connected to ball nut pair 1, the top of ball nut pair 1 is fixedly connected to a sliding seat, the left and right sides of the top of the base are fixedly connected to guide blocks, and the left side of the top of the sliding seat is fixedly connected to a lifting frame.

[0009] According to the above technical solution, the lifting mechanism includes motor 2, screw 2, ball nut pair 2, translation frame, motor 3, screw 3, ball nut pair 3, extrusion head and feed pipe. Motor 2 is fixedly connected to the right side of the top of the lifting frame, motor 2 has an output shaft, screw 2 is fixedly connected to the output shaft of motor 2, ball nut pair 2 is threadedly connected to the outer surface of the middle part of screw 2, translation frame is fixedly connected to the front face of ball nut pair 2, motor 3 is fixedly connected to the front left side of the translation frame, motor 3 has an output shaft, screw 3 is fixedly connected to the output shaft of motor 3, ball nut pair 3 is threadedly connected to the outer surface of the middle part of screw 3, extrusion head is fixedly connected to the front face of ball nut pair 3, and feed pipe is fixedly connected to the middle of the top of the extrusion head.

[0010] According to the above technical solution, the vibration mechanism includes a support plate, motor four, an elliptical disc, an airbag, a spring one, an air pipe and an extrusion frame. The support plate is fixedly connected to the top of the front of the extrusion head, the motor four is fixedly connected to the middle of the top of the support plate, the motor four has an output shaft, the elliptical disc is fixedly connected to the output shaft of motor four, the airbag is fixedly connected to the bottom of the support plate, the extrusion frame is fixedly connected to the front ends of the left and right sides of the top of the support plate, and the air pipe is fixedly connected to the top of the left side of the airbag.

[0011] According to the above technical solution, the knocking mechanism includes a fixed plate, a sealing box, a second spring, a sealing plate, a movable rod, a knocking block and a third spring. The fixed plate is fixedly connected to the left side of the top of the extrusion head, the sealing box is fixedly connected to the middle of the left side of the fixed plate, the second spring is fixedly connected to the front and rear ends of the left side of the sealing box, the sealing plate is fixedly connected to the right end of the second spring, the movable rod is fixedly connected to the middle of the right side of the sealing plate, the knocking block is fixedly connected to the right end of the movable rod, and the third spring is fixedly connected to the front and rear ends of the left side of the knocking block.

[0012] According to the above technical solution, the front end of the rotating rod is rotatably connected to the inner wall of the front face of the drive box, the rear end of the rotating rod passes through the back face of the drive box and the front face of the base and extends to the base to be fixedly connected to screw one, the rear end of screw one is rotatably connected to the inner wall of the back face of the base, and the left side of the bottom of the sliding seat is slidably connected to the guide block, so that the sliding seat is more stable when sliding on the guide block.

[0013] According to the above technical solution, the output shaft of the second motor passes through the top of the lifting frame and extends to the bottom of the lifting frame to be fixedly connected to the second screw. The bottom end of the second screw is rotatably connected to the inner wall of the bottom of the lifting frame. The second screw is provided with limit rings near the top and bottom. The end of the feed pipe away from the extrusion head is connected to the external concrete delivery pipe, so that the external concrete can be introduced into the extrusion head through the feed pipe.

[0014] According to the above technical solution, the air supply pipe is fixedly connected to the middle part of the left side of the sealing box at one end away from the airbag, and the airbag is connected to the left side of the sealing box through the air supply pipe. The bottom of the airbag is fixedly connected to the rear side of the top of the extrusion frame, so that the extrusion frame can extrude the airbag when it swings up and down.

[0015] According to the above technical solution, the left end of the third spring is fixedly connected to the right side of the fixed plate, and an impact ball is provided on the right side of the knocking block. The impact ball is made of rubber, which can reduce the damage caused by the knocking block hitting the feeding pipe.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: in the present invention, when it is necessary to control the front and rear position of the extruder head on the extruder head, by turning on the motor 1, the motor 1 controls the rotation of the pulley 1 when it is working, and when the pulley 1 rotates, the pulley 2 is driven to rotate by the belt, so that the rotating rod in the middle of the pulley 2 rotates. When the rotating rod rotates, the lead screw 1 at the rear end of the rotating rod rotates accordingly, so that the ball nut pair 1 moves forward and backward on the lead screw 1, thereby controlling the sliding seat to slide forward and backward on the guide block, and at the same time, the front and rear position of the extruder head can be adjusted;

[0017] When the height of the extruder head needs to be adjusted, the second motor is turned on. The second motor controls the rotation of the second screw when working, so that the second ball nut pair is lifted up and down on the second screw, and the translation frame is lifted up and down on the second screw, so that the extruder head can be controlled to lift up and down when working;

[0018] When the extruder head needs to be controlled to move left and right, the motor 3 is turned on. When the motor 3 is working, the screw 3 is controlled to rotate, so that the ball nut pair 3 on the screw 3 moves left and right on the screw 3. When the ball nut pair 3 moves, the extruder head can be controlled to move left and right.

[0019] When the extruder head is working, the motor four is controlled to work, and the elliptical disc is controlled to rotate when the motor four is working. When the elliptical disc rotates, the top of the extrusion frame is squeezed. When the elliptical disc squeezes the extrusion frame, the airbag on the extrusion frame squeezes the bottom of the support plate, so that the air in the airbag can be introduced into the sealing box through the air pipe, so that the pressure on the left side of the sealing box is increased, and the spring two is stretched. When the spring two is stretched, the moving rod on the right side of the sealing plate pushes the knocking block to hit the feed pipe, which can knock off the concrete adhered to the inner wall of the feed pipe. By knocking or vibrating, impact force or high-frequency vibration can be generated to loosen the concrete and make it easier to pass through the pipeline. Knocking or vibration can accelerate the flow of concrete, so that it can pass through the supply pipeline more smoothly and avoid blockage. By knocking or vibrating, the solidification layer of the concrete can be destroyed, making its composition more uniform, thereby improving the density and uniformity of the concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the interior of the drive box of the present invention;

[0023] Figure 3 This is a schematic diagram of the lifting frame of the present invention;

[0024] Figure 4 yes Figure 3 A in the middle is an enlarged schematic diagram;

[0025] Figure 5 It is a schematic diagram of three parts of the ball nut pair of the present invention;

[0026] Figure 6 It is a schematic diagram of a spring of the present invention;

[0027] Figure 7 It is a schematic diagram of the interior of the sealed box of the present invention.

[0028] In the figure: 1. Base; 2. Drive box; 3. Workbench; 4. Moving mechanism; 401. Motor 1; 402. Pulley 1; 403. Belt; 404. Pulley 2; 405. Rotating rod; 406. Lead screw 1; 407. Ball nut pair 1; 408. Sliding seat; 409. Guide block; 410. Lifting frame; 5. Lifting mechanism; 501. Motor 2; 502. Lead screw 2; 503. Ball nut pair 2; 504. Translation frame; 505. Motor 3; 506. Screw three; 507. Ball nut pair three; 508. Extruder; 509. Feed pipe; 6. Vibration mechanism; 601. Support plate; 602. Motor four; 603. Elliptical disk; 604. Airbag; 605. Spring one; 606. Air pipe; 607. Extrusion frame; 7. Knocking mechanism; 701. Fixed plate; 702. Sealing box; 703. Spring two; 704. Sealing plate; 705. Moving rod; 706. Knocking block; 707. Spring three. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-5 The present invention provides a technical solution: an ultra-high performance concrete 3D printer, comprising a base 1, a drive box 2 fixedly connected to the front of the base 1, a workbench 3 fixedly connected to the middle of the top of the base 1, a moving mechanism 4 is provided in the drive box 2, a lifting mechanism 5 is provided on the left and right sides of the top of the base 1, a vibration mechanism 6 is provided in the middle of the front of the lifting mechanism 5, and a knocking mechanism 7 is provided on the top of the vibration mechanism 6.

[0031] Wherein, the moving mechanism 4 includes:

[0032] Motor 1 401 is fixedly connected to the middle of the bottom of the drive box 2. Motor 1 401 has an output shaft. The output shaft of motor 1 401 is fixedly connected to pulley 1 402. The outer surface of pulley 1 402 is connected to belt 403 for transmission. The inner side of the left end of belt 403 is connected to pulley 2 404 for transmission. The middle part of pulley 2 404 is fixedly connected to rotating rod 405. The rear end of rotating rod 405 is fixedly connected to screw 1 406. The middle part of the outer surface of screw 1 406 is threadedly connected to ball nut pair 1 407. The top of ball nut pair 1 407 is fixedly connected to sliding seat 408. Guide blocks 409 are fixedly connected to the left and right sides of the top of base 1. The left side of the top of sliding seat 408 is fixedly connected to lifting frame 410.

[0033] The lifting mechanism 5 includes a second motor 501, a second screw 502, a second ball nut pair 503, a translation frame 504, a third motor 505, a third screw 506, a third ball nut pair 507, an extruder head 508 and a feed pipe 509. The second motor 501 is fixedly connected to the right side of the top of the lifting frame 410. The second motor 501 has an output shaft. The second screw 502 is fixedly connected to the output shaft of the second motor 501. The second ball nut pair 503 is threadedly connected to the middle of the second screw 502. The outer surface, the translation frame 504 is fixedly connected to the front face of the ball nut pair 2 503, the motor 3 505 is fixedly connected to the front end on the left side of the translation frame 504, the motor 3 505 has an output shaft, the screw 3 506 is fixedly connected to the output shaft of the motor 3 505, the ball nut pair 3 507 is threadedly connected to the outer surface of the middle part of the screw 3 506, the extrusion head 508 is fixedly connected to the front face of the ball nut pair 3 507, and the feed pipe 509 is fixedly connected to the middle of the top of the extrusion head 508.

[0034] The front end of the rotating rod 405 is rotatably connected to the inner wall of the front face of the driving box 2, and the rear end of the rotating rod 405 passes through the back face of the driving box 2 and the front face of the base 1 and extends to the inside of the base 1 to be fixedly connected to the lead screw 406, and the rear end of the lead screw 406 is rotatably connected to the inner wall of the back face of the base 1, and the left side of the bottom of the sliding seat 408 is slidably connected to the guide block 409, so that the sliding seat 408 is more stable when sliding on the guide block 409.

[0035] The output shaft of motor 2 501 passes through the top of the lifting frame 410 and extends to the bottom of the lifting frame 410 to be fixedly connected to screw 2 502. The bottom end of screw 2 502 is rotatably connected to the inner wall of the bottom of the lifting frame 410. Limit rings are provided near the top and bottom of screw 2 502. The end of the feed pipe 509 away from the extrusion head 508 is connected to the external concrete delivery pipeline, so that external concrete can be introduced into the extrusion head 508 through the feed pipe 509.

[0036] When it is necessary to control the front and rear position of the extruder 508, the motor 1 401 is turned on. When the motor 1 401 is working, the pulley 1 402 is controlled to rotate. When the pulley 1 402 rotates, the pulley 2 404 is driven to rotate through the belt 403, so that the rotating rod 405 in the middle of the pulley 2 404 rotates. When the rotating rod 405 rotates, the screw 1 406 at the rear end of the rotating rod 405 rotates accordingly, so that the ball nut pair 1 407 moves back and forth on the screw 1 406, thereby controlling the sliding seat 408 to slide back and forth on the guide block 409, and the front and rear position of the extruder 508 can be adjusted at the same time.

[0037] When the height of the extruder head 508 needs to be adjusted, the motor 2 501 is turned on. The motor 2 501 controls the rotation of the screw 2 502 during operation, so that the ball nut pair 2 503 can be raised and lowered on the screw 2 502. The translation frame 504 can be raised and lowered on the screw 2 502, and the extruder head 508 can be controlled to be raised and lowered during operation.

[0038] When it is necessary to control the extrusion head 508 to move left and right, by turning on motor three 505, motor three 505 controls the rotation of screw three 506 when working, so that the ball nut pair three 507 on the screw three 506 moves left and right on the screw three 506. When the ball nut pair three 507 moves, the extrusion head 508 can be controlled to move left and right.

[0039] See also Figure 6-7 The present invention provides a technical solution: the vibration mechanism 6 includes a support plate 601, a motor four 602, an elliptical disk 603, an airbag 604, a spring one 605, an air pipe 606 and an extrusion frame 607. The support plate 601 is fixedly connected to the top of the front of the extrusion head 508, the motor four 602 is fixedly connected to the middle of the top of the support plate 601, the motor four 602 has an output shaft, the elliptical disk 603 is fixedly connected to the output shaft of the motor four 602, the airbag 604 is fixedly connected to the bottom of the support plate 601, the extrusion frame 607 is fixedly connected to the front ends of the left and right sides of the top of the support plate 601, and the air pipe 606 is fixedly connected to the top left of the airbag 604.

[0040] The knocking mechanism 7 includes a fixed plate 701, a sealing box 702, a second spring 703, a sealing plate 704, a moving rod 705, a knocking block 706 and a third spring 707. The fixed plate 701 is fixedly connected to the left side of the top of the extrusion head 508, the sealing box 702 is fixedly connected to the middle of the left side of the fixed plate 701, the second spring 703 is fixedly connected to the front and rear ends of the left side of the sealing box 702, the sealing plate 704 is fixedly connected to the right end of the second spring 703, the moving rod 705 is fixedly connected to the middle of the right side of the sealing plate 704, the knocking block 706 is fixedly connected to the right end of the moving rod 705, and the third spring 707 is fixedly connected to the front and rear ends of the left side of the knocking block 706.

[0041] The end of the air supply pipe 606 away from the airbag 604 is fixedly connected to the middle of the left side of the sealing box 702. The airbag 604 is connected to the left side of the sealing box 702 through the air supply pipe 606. The bottom of the airbag 604 is fixedly connected to the top rear side of the extrusion frame 607, so that the extrusion frame 607 can extrude the airbag 604 when it swings up and down.

[0042] The left end of spring three 707 is fixedly connected to the right side of the fixed plate 701. An impact ball is provided on the right side of the knocking block 706. The impact ball is made of rubber, which can reduce the damage caused by the knocking block 706 hitting the feeding pipe 509.

[0043] When the extruder head 508 is working, the motor 4 602 is controlled to work. When the motor 4 602 is working, the elliptical disc 603 is controlled to rotate. When the elliptical disc 603 rotates, it squeezes the top of the extrusion frame 607. When the elliptical disc 603 squeezes the extrusion frame 607, the airbag 604 on the extrusion frame 607 squeezes the bottom of the support plate 601, so that the air in the airbag 604 can be introduced into the sealing box 702 through the air pipe 606, so that the pressure on the left side of the sealing box 702 increases, and the spring 2 703 is stretched. When 703 is stretched, the right moving rod 705 of the sealing plate 704 pushes the knocking block 706 to impact the feeding pipe 509, which can knock off the concrete adhering to the inner wall of the feeding pipe 509. By knocking or vibrating, impact force or high-frequency vibration can be generated to loosen the concrete, making it easier to pass through the pipeline. Knocking or vibration can accelerate the flow of concrete, making it smoother through the supply pipeline and avoiding blockage. By knocking or vibrating, the solidified layer of concrete can be destroyed, making its composition more uniform, thereby improving the density and uniformity of the concrete.

[0044] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An ultra-high performance concrete 3D printer, comprising a base (1), characterized in that: The front of the base (1) is fixedly connected to a driving box (2), the middle of the top of the base (1) is fixedly connected to a workbench (3), a moving mechanism (4) is provided in the driving box (2), and lifting mechanisms (5) are provided on the left and right sides of the top of the base (1), a vibration mechanism (6) is provided in the middle of the front of the lifting mechanism (5), and a knocking mechanism (7) is provided on the top of the vibration mechanism (6); Wherein, the moving mechanism (4) comprises: Motor 1 (401), Motor 1 (401) is fixedly connected to the middle of the bottom of the drive box (2), Motor 1 (401) has an output shaft, the output shaft of Motor 1 (401) is fixedly connected to Pulley 1 (402), the outer surface of Pulley 1 (402) is connected to a belt (403), the inner side of the left end of the belt (403) is connected to Pulley 2 (404), the middle of Pulley 2 (404) is fixedly connected to a rotating rod (405), the rear end of the rotating rod (405) is fixedly connected to Screw 1 (406), the middle of the outer surface of Screw 1 (406) is threadedly connected to Ball Nut Pair 1 (407), the top of Ball Nut Pair 1 (407) is fixedly connected to a sliding seat (408), the left and right sides of the top of the base (1) are fixedly connected to guide blocks (409), and the left side of the top of the sliding seat (408) is fixedly connected to a lifting frame (410); The lifting mechanism (5) includes a second motor (501), a second screw (502), a second ball nut pair (503), a translation frame (504), a third motor (505), a third screw (506), a third ball nut pair (507), an extruder head (508) and a feeding tube (509), wherein the second motor (501) is fixedly connected to the right side of the top of the lifting frame (410), the second motor (501) has an output shaft, the second screw (502) is fixedly connected to the output shaft of the second motor (501), and the second ball nut pair (503) is threadedly connected to the second screw (502). The middle outer surface, the translation frame (504) is fixedly connected to the front of the ball nut pair 2 (503), the motor 3 (505) is fixedly connected to the front end of the left side of the translation frame (504), the motor 3 (505) has an output shaft, the screw 3 (506) is fixedly connected to the output shaft of the motor 3 (505), the ball nut pair 3 (507) is threadedly connected to the middle outer surface of the screw 3 (506), the extrusion head (508) is fixedly connected to the front of the ball nut pair 3 (507), and the feed pipe (509) is fixedly connected to the middle of the top of the extrusion head (508); The vibration mechanism (6) includes a support plate (601), a motor four (602), an elliptical disc (603), an airbag (604), a spring one (605), an air pipe (606) and an extrusion frame (607), wherein the support plate (601) is fixedly connected to the front top of the extrusion head (508), the motor four (602) is fixedly connected to the middle of the top of the support plate (601), the motor four (602) has an output shaft, the elliptical disc (603) is fixedly connected to the output shaft of the motor four (602), the airbag (604) is fixedly connected to the bottom of the support plate (601), the extrusion frame (607) is fixedly connected to the front ends of the left and right sides of the top of the support plate (601), and the air pipe (606) is fixedly connected to the top left of the airbag (604); The knocking mechanism (7) comprises a fixed plate (701), a sealing box (702), a second spring (703), a sealing plate (704), a moving rod (705), a knocking block (706) and a third spring (707), wherein the fixed plate (701) is fixedly connected to the left side of the top of the extrusion head (508), the sealing box (702) is fixedly connected to the middle of the left side of the fixed plate (701), the second spring (703) is fixedly connected to the front and rear ends of the left side of the sealing box (702), the sealing plate (704) is fixedly connected to the right end of the second spring (703), the moving rod (705) is fixedly connected to the middle of the right side of the sealing plate (704), the knocking block (706) is fixedly connected to the right end of the moving rod (705), and the third spring (707) is fixedly connected to the front and rear ends of the left side of the knocking block (706).

2. The ultra-high performance concrete 3D printer according to claim 1, characterized in that: The front end of the rotating rod (405) is rotatably connected to the front inner wall of the driving box (2), and the rear end of the rotating rod (405) passes through the back of the driving box (2) and the front of the base (1) and extends to the base (1) to be fixedly connected to the screw 1 (406), and the rear end of the screw 1 (406) is rotatably connected to the back inner wall of the base (1), and the left side of the bottom of the sliding seat (408) is slidably connected to the guide block (409).

3. The ultra-high performance concrete 3D printer according to claim 2, characterized in that: The output shaft of the second motor (501) passes through the top of the lifting frame (410) and extends to the bottom of the lifting frame (410) to be fixedly connected to the second screw (502). The bottom end of the second screw (502) is rotatably connected to the bottom inner wall of the lifting frame (410). The second screw (502) is provided with limit rings near the top and bottom. The end of the feeding pipe (509) away from the extrusion head (508) is connected to the external concrete delivery pipeline.

4. The ultra-high performance concrete 3D printer according to claim 3, characterized in that: One end of the air supply pipe (606) away from the airbag (604) is fixedly connected to the middle of the left side of the sealing box (702). The airbag (604) is connected to the left side of the sealing box (702) through the air supply pipe (606). The bottom of the airbag (604) is fixedly connected to the top rear side of the extrusion frame (607).

5. The ultra-high performance concrete 3D printer according to claim 4, characterized in that: The left end of the spring three (707) is fixedly connected to the right side of the fixed plate (701), and an impact ball is provided on the right side of the knocking block (706), and the impact ball is made of rubber.

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