CN113878875A

CN113878875A - 3D printing equipment

Info

Publication number: CN113878875A
Application number: CN202111157835.4A
Authority: CN
Inventors: 俞红祥; 刘浪
Original assignee: Hangzhou Zhengzeng Material Manufacturing Technology Co ltd
Current assignee: Hangzhou Zhengzeng Material Manufacturing Technology Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-01-04
Anticipated expiration: 2041-09-30
Also published as: CN113878875B

Abstract

The invention relates to a 3D printing device, which comprises a discharging head and a side part constraint assembly. The discharging head is provided with a discharging nozzle. The lateral part restraint assembly is provided with two lateral part restraint surfaces which are arranged in parallel relatively, and the two lateral part restraint surfaces are respectively positioned on two sides of the discharging nozzle and used for limiting end surfaces of two sides of a printing material flowing out of the discharging nozzle. Because two sides of the discharging nozzle are provided with two lateral restraining surfaces which are arranged in parallel. Consequently, when the printing material was extruded towards the printing face to ejection of compact head, two lateral part restraint faces can restrain the both sides terminal surface of the printing material that the ejection of compact mouth flows to make the both sides terminal surface of printing material become level and smooth, also print out the cross section and print the layer for the strip of rectangle, thereby guaranteed 3D printing apparatus's printing effect.

Description

3D printing equipment

Technical Field

The invention relates to the technical field of additive manufacturing, in particular to 3D printing equipment.

Background

3D printing is one of the rapid prototyping technologies, also known as additive manufacturing. 3D printing is a technique for building objects by layer-by-layer printing based on digital model files. With the continuous maturity of 3D printing technology and the stability of the used equipment of 3D printing technology constantly promotes, the range of application of 3D printing technology constantly enlarges.

The field fusion forming technology is an important technical branch in the field of additive manufacturing, and has the advantages of simple principle, multiple applicable material types, low equipment cost and the like. The on-site fusion forming technology can be divided into a high-molecular hot-melt forming technology, a metal fuse bead welding forming technology and a concrete accumulation forming technology according to different printing materials. Specifically, the basic principle of the field fusion forming technology is as follows: the printing material is laid in the printing face through ejection of compact head to make the printing material form on the printing face through the relative movement of ejection of compact head and printing face and print the layer, a plurality of layers of printing successive layer accumulations, until printing out complete 3D and print the model.

Usually, the ejection of compact head is equipped with ejection of compact mouth, and printing material is extruded out the stub bar through ejection of compact mouth and is formed banding printing layer on the face of printing, but, under the effect of gravity, the both sides terminal surface on layer can outwards bulge is printed to the strip of solidifying for the terminal surface that the layer both sides were printed to the strip becomes the unevenness, so, after a plurality of layers of printing superpose layer upon layer, the side of the 3D printing model of formation can present unevenness form, thereby influence 3D printing apparatus's printing effect.

Disclosure of Invention

In view of this, it is necessary to provide a 3D printing apparatus, which solves the problem that the printing effect of the printing apparatus is affected due to the uneven end surfaces of the two sides of the strip-shaped printing layer, which is printed by the existing printing apparatus, due to the outward protrusion of the end surfaces of the two sides of the printing layer.

The invention provides 3D printing equipment which comprises a discharging head and a side part constraint assembly. The discharging head is provided with a discharging nozzle. The lateral part restraint assembly is provided with two lateral part restraint surfaces which are arranged in parallel relatively, and the two lateral part restraint surfaces are respectively positioned on two sides of the discharging nozzle and used for limiting end surfaces of two sides of a printing material flowing out of the discharging nozzle.

In an embodiment of the invention, the side restriction assembly includes two oppositely disposed restriction baffles, and a side surface of the restriction baffle facing the discharge nozzle forms a side restriction surface. So, can directly set up the lateral part and retrain the face on retrain the baffle, greatly reduced 3D printing apparatus's the manufacturing degree of difficulty.

In an embodiment of the invention, the lateral restraining assembly further comprises a rotating assembly, the rotating assembly is connected with the restraining baffles and the discharging head, and the rotating assembly can adjust the two restraining baffles to rotate around the axial direction of the discharging nozzle synchronously. Therefore, the lateral restraining surface of the restraining baffle and the end surfaces of the two sides of the strip-shaped printing layer can always keep a tangent state, and the strip-shaped printing layer is prevented from being damaged by the restraining baffle.

In an embodiment of the present invention, the rotating assembly includes a rotating disc and a bearing connecting the rotating disc and the discharging head, and the rotating disc is rotatably connected to the discharging head through the bearing; the restraint baffle is connected with the rotating disc so that the rotating disc drives the restraint baffle to rotate around the axial direction of the discharging nozzle. So, through rotating the rolling disc, alright realize that the restraint baffle rotates around the axial synchronization of ejection of compact mouth, greatly reduced 3D printing apparatus's the processing degree of difficulty.

In an embodiment of the invention, the rotating assembly further includes a mounting plate, a first driving motor and a driving gear, the mounting plate is fixedly connected with the discharging head, the first driving motor is mounted on the mounting plate, the driving gear is connected to an output shaft of the first driving motor, the driving gear is meshed with the rotating disc, and the first driving motor drives the driving gear to rotate and the rotating disc to rotate so as to drive the restraining baffle to rotate. So set up, be favorable to improving the rotation precision of rolling disc.

In an embodiment of the invention, the side restriction component further includes a telescopic bracket, and the telescopic bracket is connected with the rotation component and the restriction baffles so as to synchronously adjust the length of the two restriction baffles, which is far away from one end of the rotation component and protrudes out of the discharge nozzle.

In an embodiment of the invention, the lateral constraint assembly further includes a sliding bracket, the sliding bracket is fixedly connected with the constraint baffle, and the constraint baffle is movably connected with the telescopic bracket through the sliding bracket, so as to adjust the distance between the two constraint baffles through the sliding bracket.

In an embodiment of the present invention, the sliding bracket is provided with a sliding groove extending along a radial direction of the discharging nozzle, and one end of the telescopic bracket, which is far away from the rotating assembly, is inserted into the sliding groove and can be fixed at any position in a length direction of the sliding groove.

In an embodiment of the invention, the 3D printing apparatus further includes a storage bin, the storage bin is disposed above the discharging head, and the storage bin is connected to the discharging head through a pipeline. One side of the storage bin is provided with a vibrator, and the vibrator can drive the storage bin to vibrate. Therefore, the method is beneficial to improving the compactness of the printing material and removing the gas mixed in the printing material.

In an embodiment of the invention, the bottom surface of the storage bin is connected to the pipeline, the side wall of the storage bin near one end of the pipeline is obliquely arranged, and the cross-sectional area of the storage bin is gradually reduced from a direction away from the pipeline to a direction close to the pipeline. So set up, be favorable to improving the ejection of compact speed of storage silo to make printing material leave the storage silo more fast and get into out the stub bar.

According to the 3D printing equipment provided by the invention, two side part constraint surfaces are arranged on two sides of the discharging nozzle and are arranged in parallel. Consequently, when the printing material was extruded towards the printing face to ejection of compact head, two lateral part restraint faces can restrain the both sides terminal surface of the printing material that the ejection of compact mouth flows to make the both sides terminal surface of printing material become level and smooth, also print out the cross section and print the layer for the strip of rectangle, thereby guaranteed 3D printing apparatus's printing effect.

Drawings

Fig. 1 is a schematic structural diagram of a 3D printing apparatus according to an embodiment of the present invention;

fig. 2 is a schematic partial structure diagram of a 3D printing apparatus according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of a 3D printing apparatus according to an embodiment of the invention;

fig. 4 is a control circuit diagram of a 3D printing apparatus according to an embodiment of the present invention.

Reference numerals: 100. printing the layer; 200. discharging a stub bar; 201. a discharging nozzle; 300. a side restraint assembly; 301. a restraint baffle; 302. a lateral constraining surface; 303. a rotating assembly; 3031. rotating the disc; 3032. mounting a plate; 3033. a first drive motor; 3034. a driving gear; 304. a telescopic bracket; 305. a sliding support; 400. an XY biaxial drive unit; 401. an X-axis drive unit; 402. a Y-axis drive unit; 500. a storage bin; 501. a vibrator; 502. a pipeline; 503. a second drive motor; 504. a substrate; 505. a vibration isolation mount; 600. a fixed frame; 601. a printing space; 602. a lifting platform; 700. a feeding unit; 701. a feeding hose; 702. a material quantity sensor; 800. a remainder collection unit; 900. and a controller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the process of building large or even ultra-large objects, in order to improve the building efficiency and reduce the labor cost required by building, the on-site fusion forming technology is often used. For example, in the field of construction, the pouring of cement is carried out by the in-situ fusion forming technique.

The field fusion forming technology is one of 3D printing technologies, and further, the basic principle of the field fusion forming technology is as follows: the 3D printing apparatus extrudes a fluid-like printing material on the printing surface through the discharge head 200, thereby printing out the 3D model on the printing surface. Specifically, the printing material is laid on the printing surface through the discharging head 200, and the printing material forms the printing layer 100 on the printing surface through the relative movement of the discharging head 200 and the printing surface, and the plurality of printing layers 100 are accumulated layer by layer until the complete 3D printing model is printed.

Generally, stub bar 200 is equipped with ejection of compact mouth 201, and printing material is extruded stub bar 200 through ejection of compact mouth 201 and is formed banding printing layer 100 on the printing face, but, under the effect of gravity, the both sides terminal surface that layer 100 was printed to uncured banding can outwards bulge for the terminal surface that layer 100 both sides were printed to the banding becomes the unevenness, so, after a plurality of layers 100 of printing superpose layer upon layer, the side of the 3D printing model of formation can present unevenness, thereby influence 3D printing apparatus's printing effect.

In view of this, the invention provides a 3D printing apparatus, which is used to solve the problem that the printing effect of the printing apparatus is affected due to the fact that the end surfaces of the two sides of the strip-shaped printing layer 100 become uneven because the end surfaces of the two sides of the printing layer 100 printed by the existing printing apparatus protrude outwards.

Specifically, referring to fig. 1 to 3, the 3D printing apparatus provided by the present invention includes a discharging head 200 and a side constraint assembly 300. The discharging head 200 is provided with a discharging nozzle 201. The side restraining assembly 300 is provided with two side restraining surfaces 302 arranged in parallel, and the two side restraining surfaces 302 are respectively positioned at two sides of the discharging nozzle 201 so as to limit two side end surfaces of the printing material flowing out of the discharging nozzle 201.

It should be noted that, in the process that the printing material is extruded out of the material head 200 through the discharging nozzle 201 and the strip-shaped printing layer 100 is formed on the printing surface, the two side constraint surfaces 302 are attached to the two sides of the strip-shaped printing layer 100 and form constraints on the two side end surfaces of the strip-shaped printing layer 100, and then the strip-shaped printing layer 100 is cured under the constraints of the two side constraint surfaces 302. The two side constraining surfaces 302 move along the length direction of the strip-shaped printing layer 100 along with the discharging head 200 until the whole printing layer 100 is printed.

Two side restraining surfaces 302 are arranged on two sides of the discharging nozzle 201, and the two side restraining surfaces 302 are arranged in parallel. Therefore, when the discharging head 200 extrudes the printing material towards the printing surface, the two side constraint surfaces 302 can constrain the two side end surfaces of the printing material flowing out of the discharging nozzle 201, so that the two side end surfaces of the printing material become flat, that is, the strip-shaped printing layer 100 with the rectangular cross section is printed, and the printing effect of the 3D printing device is ensured.

In order to reduce the difficulty of positioning the side constraining surfaces 302. In one embodiment, as shown in fig. 3, the side restraining assembly 300 includes two oppositely disposed restraining baffles 301, and a side surface of the restraining baffles 301 facing the tap 201 forms a side restraining surface 302. Therefore, the side constraint surface 302 can be directly arranged on the constraint baffle 301, and the manufacturing difficulty of the 3D printing device is greatly reduced. Specifically, the restriction baffle 301 is a square thin plate, and the side restriction surface 302 is a plane, so that the processing and manufacturing of the restriction baffle 301 are facilitated, and the processing cost of the 3D printing device is reduced. The side constraining surfaces 302 may also be curved surfaces. When the side constraining surface 302 is a curved surface, the side constraining surface 302 protrudes toward the discharging nozzle 201, so as to be beneficial to avoiding scratching the printing layer 100 during the movement of the constraining baffle 301 relative to the printing layer 100.

During the printing process of the printing layer 100, the discharging head 200 moves in the printing space 601 according to a preset program. In order to improve the moving flexibility of the discharging head 200, in an embodiment, as shown in fig. 1 and 4, the 3D printing apparatus provided by the present invention controls the movement of the discharging head 200 by using an XY biaxial driving unit 400. Specifically, the XY biaxial drive unit 400 includes an X axis drive unit 401 and a Y axis drive unit 402, the discharge head 200 is movably provided to the Y axis drive unit 402, and the Y axis drive unit 402 can directly drive the discharge head 200 to move in the Y axis direction. The Y-axis driving unit 402 is movably disposed on the X-axis driving unit 401, and the X-axis driving unit 401 can drive the Y-axis moving unit provided with the discharging head 200 to move along the X-axis direction. In this way, the movement of the stub bar 200 in the two-dimensional plane can be realized by respectively controlling the movement of the X-axis driving unit 401 and the movement of the Y-axis driving unit 402 through the preset program. And, the XY biaxial driving unit 400 is electrically connected to the controller 900, and the 3D printing apparatus controls the XY biaxial driving unit 400 to operate through the controller 900.

Further, in order to improve the operation stability of the XY biaxial driving unit 400, the 3D printing apparatus is provided with two X axis driving units 401 arranged in parallel, and the two X axis driving units 401 are respectively provided at both ends of the Y axis driving unit 402 to synchronously drive the Y axis driving unit 402 to move in the X axis direction. Specifically, when the Y-axis drive unit 402 is moved to the middle position of the X-axis drive unit 401, the entire XY biaxial drive unit 400 is in an H shape.

In the process that the XY biaxial drive unit 400 drives the discharging head 200 to move, the discharging head 200 does not rotate by itself. Therefore, when the end surfaces of the two sides of the strip-shaped printing layer 100 printed by the 3D printing device are curved surfaces, the discharging head 200 cannot drive the restraining baffle 301 to rotate, so that the restraining baffle 301 can damage the strip-shaped printing layer 100.

In order to avoid the constraint baffles 301 from damaging the strip-shaped printing layer 100, in an embodiment, as shown in fig. 3, the side constraint assembly 300 further includes a rotating assembly 303, the rotating assembly 303 connects the constraint baffles 301 with the discharging head 200, and the rotating assembly 303 can adjust the two constraint baffles 301 to rotate synchronously around the axial direction of the discharging nozzle 201. Therefore, the side constraining surfaces 302 of the constraining baffle 301 and the end surfaces on two sides of the strip-shaped printing layer 100 can always keep a tangent state, and the constraining baffle 301 is prevented from damaging the strip-shaped printing layer 100.

Specifically, as shown in fig. 3, the rotating assembly 303 includes a rotating disc 3031 and a bearing (not shown) connecting the rotating disc 3031 and the discharging head 200, and the rotating disc 3031 is rotatably connected to the discharging head 200 through the bearing. It should be noted that the bearing is sleeved on the discharge head 200, and the rotary disc 3031 is sleeved outside the bearing, so that the rotary disc 3031 and the discharge head 200 rotate relatively by rolling of balls in the bearing. And, the restricting baffle 301 is connected with the rotary disc 3031, so that the rotary disc 3031 drives the restricting baffle 301 to rotate around the axial direction of the discharging nozzle 201. Therefore, by rotating the rotary disc 3031, the constraint baffle 301 can rotate synchronously around the axial direction of the discharging nozzle 201, and the processing difficulty of the 3D printing equipment is greatly reduced.

Further, in order to improve the rotation accuracy of the rotary disk 3031. In an embodiment, as shown in fig. 3, the rotating assembly 303 further includes a mounting plate 3032, a first driving motor 3033, and a driving gear 3034, the mounting plate 3032 is fixedly connected to the discharge head 200, the first driving motor 3033 is mounted to the mounting plate 3032, the driving gear 3034 is connected to an output shaft of the first driving motor 3033, the driving gear 3034 is in meshing connection with the rotating disc 3031, and the first driving motor 3033 drives the restricting baffle 301 to rotate by driving the driving gear 3034 to rotate and driving the rotating disc to rotate. Thus, the first driving motor 3033 drives the rotating disc 3031 to rotate by driving the driving gear 3034 to rotate, and finally, the restraint baffle 301 rotates around the discharging nozzle 201 in an axial direction synchronously. Further, as shown in fig. 4, the first drive motor 3033 is electrically connected to the controller 900, and the 3D printing apparatus controls the rotation of the first drive motor 3033 through the controller 900.

When the thickness of the printing layer 100 is different, the length of the restraining baffle 301 protruding from the discharging nozzle 201 at the end far away from the rotating assembly 303 should be adjusted correspondingly with the thickness change of the printing layer 100. In one embodiment, as shown in fig. 3, the side restraining assembly 300 further comprises a telescopic bracket 304, and the telescopic bracket 304 connects the rotating assembly 303 and the restraining baffles 301 so as to synchronously adjust the length of the two restraining baffles 301 protruding from the tap 201 at the end away from the rotating assembly 303. Specifically, one end of the telescopic bracket 304 is fixedly connected with the rotary disc 3031, the other end of the telescopic bracket 304 is connected with the restraining baffle 301, the displacement of the restraining baffle 301 is realized through the self-expansion of the telescopic bracket 304, and the length of the end, far away from the rotating assembly 303, of the restraining baffle 301 protruding out of the discharging nozzle 201 is controlled.

Likewise, when the width of the print layer 100 is different, the distance between the two constraining baffles 301 should be adjusted accordingly as the width of the print layer 100 changes. In one embodiment, as shown in fig. 3, the side restriction assembly 300 further comprises a sliding bracket 305, the sliding bracket 305 is fixedly connected to the restriction flap 301, and the restriction flap 301 is movably connected to the telescopic bracket 304 through the sliding bracket 305, so as to adjust the distance between the two restriction flaps 301 through the sliding bracket 305. Specifically, the sliding bracket 305 is provided with a chute (not shown) extending in the radial direction of the discharge nozzle 201, and one end of the telescopic bracket 304, which is far away from the rotating assembly 303, is inserted into the chute and can be fixed at any position in the length direction of the chute. It should be noted that the telescopic bracket 304 directly controls the movement of the movable bracket, and the movement of the restraining barrier 301 is driven by the movement of the movable bracket. That is, when the telescopic bracket 304 adjusts the length of the restraining barrier 301 protruding from the tap 201 at the end away from the rotating assembly 303, the sliding bracket 305 moves in synchronization with the restraining barrier 301.

In order to increase the degree of densification of the printed material, the gas mixed in the printed material is removed. In an embodiment, as shown in fig. 3, the 3D printing apparatus further includes a storage bin 500, the storage bin 500 is disposed above the discharging head 200, and the storage bin 500 is connected to the discharging head 200 through a pipe 502. And one side of the storage bin 500 is provided with a vibrator 501, and the vibrator 501 can drive the storage bin 500 to vibrate. Thus, the printing material can be conveyed into the storage bin 500, and the gas mixed in the printing material can be separated from the printing material in the storage bin 500 because the density of the gas is far less than that of the printing material. While vibrator 501 increases the rate at which gas separates from the marking material. Also, as shown in fig. 4, the vibrator 501 is electrically connected to the controller 900, and the 3D printing apparatus controls the operation of the vibrator 501 through the controller 900.

Further, in order to increase the discharge rate of the storage bin 500, the printing material can leave the storage bin 500 and enter the discharge head 200 more quickly. In one embodiment, as shown in FIG. 3, the floor of the storage bin 500 is connected to the pipe 502, the sidewall of the storage bin 500 near one end of the pipe 502 is inclined, and the cross-sectional area of the storage bin 500 gradually decreases from a direction away from the pipe 502 to a direction near the pipe 502. Specifically, the sidewall of the end of the storage bin 500 away from the pipe 502 is perpendicular to the horizontal plane, the sidewall of the end of the storage bin 500 close to the pipe 502 forms an acute angle with the horizontal plane, and the vibrator 501 is disposed on the sidewall of the storage bin 500 that is inclined.

In this embodiment, as shown in fig. 3, a material extruding unit (not shown) is disposed inside the material outlet head 200, a driving force for extruding the printing material by the material extruding unit is derived from a second driving motor 503, and the second driving motor 503 is mounted at an end of the material outlet head 200 away from the material outlet nozzle 201 through a substrate 504. Moreover, the storage bin 500 is mounted on the substrate 504 through the vibration isolation bracket 505, and in order to protect the second driving motor 503 from the vibration generated by the vibrator 501, the vibration isolation bracket 505 is designed to be hollow, so that the vibration generated by the vibrator 501 can be prevented from being transmitted to the second driving motor 503, and the service life of the second driving motor 503 can be further prolonged. Further, as shown in fig. 4, the second driving motor 503 is electrically connected to the controller 900, and the 3D printing apparatus controls the rotation of the second driving motor 503 through the controller 900.

In order to provide a sufficiently large printing space 601, in an embodiment, as shown in fig. 1, the 3D printing apparatus further includes a fixing frame 600, the fixing frame 600 is a hollow structure, and the printing space 601 is disposed in the fixing frame 600. The XY biaxial driving unit 400 is installed at the top end of the fixed frame 600, wherein two X axis driving units 401 oppositely disposed are respectively installed at opposite sides of the fixed frame 600, and the Y axis driving unit 402 moves above the printing space 601.

When the 3D printing apparatus has printed the one-layer printed layer 100, the distance between the discharging nozzle 201 and the printing surface needs to be adjusted, so that the 3D printing apparatus can print the next printed layer 100. Therefore, in order to realize rapid adjustment of the distance between the discharging nozzle 201 and the printing surface, a lifting platform 602 moving along the Z axis is provided in the printing space 601 of the 3D printing apparatus. It should be noted that the Z-axis is perpendicular to both the X-axis and the Y-axis. Before the 3D printing apparatus is ready to print the next printing layer 100, the lifting platform 602 moves a preset distance in a direction away from the discharging nozzle 201, where the preset distance is the thickness of the printing layer 100. Further, as shown in fig. 4, the lifting platform 602 is electrically connected to the controller 900, and the 3D printing apparatus controls the movement of the lifting platform 602 through the controller 900.

In one embodiment, as shown in fig. 1, the 3D printing apparatus is further provided with a feeding unit 700, the feeding unit 700 is disposed at one side of the fixing frame 600, and the feeding unit 700 is connected to the storage bin 500 through a feeding hose 701, so that the printing material is conveyed from the feeding unit 700 to the storage bin 500. Further, as shown in fig. 4, the feeding unit 700 is electrically connected to the controller 900, and the 3D printing apparatus controls the operation of the feeding unit 700 through the controller 900. Further, as shown in fig. 3 and 4, the bottom end of the vibration isolation bracket 505 is provided with a material quantity sensor 702, the material quantity sensor 702 can detect the amount of the printing material in the storage bin 500, and the material quantity sensor 702 is connected to the controller 900 to transmit the detected data to the controller 900. When the amount of the printing material in the storage bin 500 is less than the minimum preset value, the controller 900 controls the feeding unit 700 to feed the printing material into the storage bin 500, and when the amount of the printing material in the storage bin 500 reaches the maximum preset value, the controller 900 controls the feeding unit 700 to stop feeding the printing material into the storage bin 500. Specifically, the material quantity sensor 702 may be a pressure sensor, and the amount of the printing material in the storage bin 500 is analyzed by detecting the pressure change received by the vibration isolation bracket 505.

As shown in fig. 1, the 3D printing apparatus is further provided with a residue collection unit 800, the residue collection unit 800 is installed on the fixing frame 600, and the residue collection unit 800 is located below the discharging head 200, so that the discharging head 200 extrudes the redundant printing material into the residue collection unit 800.

The features of the above-described embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above-described embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.

Claims

1. A3D printing apparatus, comprising:

the discharging head (200) is provided with a discharging nozzle (201); and

the lateral restraining component (300) is provided with two lateral restraining surfaces (302) which are arranged in parallel relatively, and the two lateral restraining surfaces (302) are respectively positioned on two sides of the discharging nozzle (201) and used for limiting two side end faces of the printing material flowing out of the discharging nozzle (201).

2. 3D printing device according to claim 1, wherein the side restraining assembly (300) comprises two oppositely arranged restraining baffles (301), a side surface of the restraining baffles (301) facing the tap (201) constituting the side restraining face (302).

3. 3D printing device according to claim 2, wherein the side constraining assembly (300) further comprises a rotating assembly (303), the rotating assembly (303) connecting the constraining baffles (301) and the outfeed head (200), the rotating assembly (303) being able to rotate both constraining baffles (301) synchronously around the axial direction of the outfeed nozzle (201).

4. The 3D printing device according to claim 3, wherein the rotating assembly (303) comprises a rotating disc (3031) and a bearing connecting the rotating disc (3031) and the discharge head (200), the rotating disc (3031) being rotatably connected to the discharge head (200) by the bearing; the restraint baffle (301) is connected with the rotating disc (3031) so that the rotating disc (3031) drives the restraint baffle (301) to rotate around the axial direction of the discharge nozzle (201).

5. The 3D printing apparatus according to claim 4, wherein the rotating assembly (303) further comprises a mounting plate (3032), a first driving motor (3033) and a driving gear (3034), the mounting plate (3032) is fixedly connected with the discharging head (200), the first driving motor (3033) is mounted on the mounting plate (3032), the driving gear (3034) is connected with an output shaft of the first driving motor (3033), the driving gear (3034) is engaged with the rotating disc (3031), and the first driving motor (3033) drives the restraining barrier (301) to rotate by driving the driving gear (3034) to rotate and driving the rotating disc (3031) to rotate.

6. The 3D printing apparatus according to claim 3, wherein the side restraint assembly (300) further comprises a telescopic bracket (304), the telescopic bracket (304) connecting the rotating assembly (303) and the restraint flaps (301) for synchronously adjusting the length of the two restraint flaps (301) protruding from the tap (201) at the end away from the rotating assembly (303).

7. The 3D printing device according to claim 6, characterized in that the side restraint assembly (300) further comprises a sliding bracket (305), the sliding bracket (305) is fixedly connected with the restraint baffle (301), and the restraint baffle (301) is movably connected with the telescopic bracket (304) through the sliding bracket (305) to adjust the distance between two restraint baffles (301) through the sliding bracket (305).

8. The 3D printing apparatus according to claim 7, wherein the sliding bracket (305) is provided with a sliding slot extending in a radial direction of the discharging nozzle (201), and an end of the telescopic bracket (304) away from the rotating assembly (303) is inserted into the sliding slot and can be fixed at any position in a length direction of the sliding slot.

9. The 3D printing apparatus according to claim 1, further comprising a storage bin (500), wherein the storage bin (500) is disposed above the discharging head (200), and the storage bin (500) is connected to the discharging head (200) through a pipe (502); one side of storage silo (500) is equipped with vibrator (501), vibrator (501) can drive storage silo (500) takes place the vibration.

10. The 3D printing apparatus according to claim 9, wherein the floor of the storage bin (500) is connected to the conduit (502), the side wall of the storage bin (500) near one end of the conduit (502) is obliquely arranged, and the cross-sectional area of the storage bin (500) gradually decreases from a direction away from the conduit (502) to a direction near the conduit (502).