CN110901065B

CN110901065B - Multi-nozzle linkage type mechanical three-dimensional printer based on level contour coupling

Info

Publication number: CN110901065B
Application number: CN201911405729.6A
Authority: CN
Inventors: 管彩琴
Original assignee: Suzhou Yudeshui Electric Technology Co Ltd
Current assignee: Suzhou Yudeshui Electric Technology Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-27
Anticipated expiration: 2039-12-31
Also published as: CN110901065A; CN112497736A; CN112497735A

Abstract

The invention discloses a multi-nozzle linkage type mechanical three-dimensional printer based on hierarchical contour coupling, which is used for printing an object and comprises a shell, a clamping frame, a light source, a light-transmitting plate and a solution plate, wherein the clamping frame with a downward chuck is arranged at the top in the shell, the clamping frame can move along the vertical direction, the light source is arranged at the bottommost part in the shell, the light source emits ultraviolet rays upwards, the solution plate is arranged between the clamping frame and the light source, a layer of photosensitive solution is filled in the solution plate, the solution plate is transparent, the light-transmitting plate is arranged between the solution plate and the light source, and a transparent area and a shielding area can be formed on the light-. The clamping frame is also provided with a rotary drive which takes a vertical central axis of the printer as an axis, and the vertical movement of the clamping frame and the rotation around the vertical axis run at intervals. Printing in a layer-by-layer forming mode, forming transparent areas with different shapes through the light-transmitting plate in each layer of printing, and then irradiating ultraviolet rays onto the photosensitive solution through the transparent areas for curing and forming.

Description

Multi-nozzle linkage type mechanical three-dimensional printer based on level contour coupling

Technical Field

The invention relates to the field of three-dimensional printers, in particular to a multi-nozzle linkage type mechanical three-dimensional printer based on hierarchical contour coupling.

Background

The three-dimensional printer is a novel object forming machine, can be directly printed and formed after a three-dimensional model drawn in a computer is introduced into the machine, and has the effects of greatly shortening the processing time and shortening the design period on the occasions of artware design, small object structural performance verification and the like.

In the prior art, most of three-dimensional printers are formed by laminating and stacking, thermosetting and bonding, the requirement on the moving running precision of a material extrusion port is high, namely the forming precision of a model is directly related to the moving precision of an ejection port, the ejection port is driven by a machine, the precision is basically only 0.1mm, and the increase is difficult. The hyperfine three-dimensional printer can be improved to the precision level of 0.03mm, but the printer is very expensive and is not beneficial to conventional use, and the high-precision printer is also relatively frequent in maintenance.

Disclosure of Invention

The invention aims to provide a multi-nozzle linkage type mechanical three-dimensional printer based on hierarchical contour coupling, and aims to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a many shower nozzles coordinated type machinery three-dimensional inkjet printer based on level profile coupling, a used for printing the article, three-dimensional inkjet printer includes the shell, the holding frame, a light source, the light-passing board, the solution board, the top sets up the holding frame that the chuck is down in the shell, the holding frame can be followed vertical direction and removed, the bottommost sets up the light source in the shell, the light source launches the ultraviolet ray up, the solution board sets up between holding frame and light source, the solution inboard is filled with the photosensitive solution of one deck, the solution board is the transparent body, set up the light-passing board between solution board and the light source, accessible signal control forms the transparent.

The object is a continuous whole, so each layer is continuous from top to bottom, the outline of each layer is overlapped with the outline of the top and the bottom in a crossed way, the slight difference of the outline forms the shape change of the outer surface, an axis in the length direction of the object is selected, then a plurality of planes are used for intercepting the object perpendicular to the axis, and one plane intercepts one layer shape of the object.

The layer-level shape is formed by a light curing principle, a layer of photosensitive resin solution is contained in the solution plate, ultraviolet rays emitted upwards by the light source can reach the solution plate only by penetrating through the light-transmitting plate, and the solution plate is transparent. The light transmitting plate is a region selective light transmitting part, and can realize different regions and shapes through signal control, when the light transmitting plate is formed, the transparent region at the center of the light transmitting plate is the shape of a layer to be formed, the shielding region blocks ultraviolet rays, so that photosensitive solution in a solution plate at the back is not cured, the liquid flow state is kept, cured resin is adhered with the previous layer, then a clamping frame clamps an article semi-finished product and moves upwards by a level height, next layer contour forming is carried out, only the cured resin is lifted and moved upwards together, the solution-shaped resin still sinks in the solution plate, when next layer contour forming is carried out, the photosensitive solution is supplemented into the solution plate, and then the shape of the transparent region of the light transmitting plate is changed, so that the contour of the next layer is formed. Thus, the printing operation is completed until the last layer of the outline of the object is printed.

The clamping frame needs to clamp a part of an object in advance, and initially, the outline of the first layer is not printed, so a process boss is needed to be clamped by the clamping frame, the process boss is a pre-prepared resin body and is clamped and soaked in the photosensitive solution, the first layer of the original model is provided with an attachment part, then the process boss continuously ascends to print a new layer of the lower layer, and after printing is finished, the process boss is cut off by using a cutter, so that the original model can be obtained. The process boss is preferably arranged on the plane of the original model, otherwise, the process boss is inconvenient to cut off when arranged on the curved surface.

The thickness of the single layer is selected according to the fineness of the printing requirement.

Furthermore, the three-dimensional printer also comprises a plurality of spray heads, spray orifices of the spray heads are positioned above the solution plate and incline downwards to face the central axis of the printer, and the spray heads are provided with moving drives on the horizontal plane.

The spray head faces downwards obliquely to the edge of the outline during printing of each layer, and after printing of each layer is finished, the spray head sprays solution with the same components to clean uncured solution adhered to the edge of the outline, more importantly, when the outline of each layer is formed, an intermediate area between curing and non-curing may exist on the boundary line of the outline, some partially-cured resin is in a softened state and exists on the boundary line, which is different from the situation that the solution can be separated from a cured body, and the solution in the softened state may be in a silk-like shape and adhered to the outline, so that the silk-like uncured body is needed to be washed away.

Furthermore, the clamping frame is also provided with a rotary drive which takes the vertical central axis of the printer as an axis, and the vertical movement of the clamping frame and the rotation around the vertical axis run at intervals. The clamping frame carries out rotary motion at the end stage of individual layer shape forming process, and the pattern on the light-passing board also carries out the rotation of same speed to make near silk wadding form semi-solid silk thread rotation winding of contour line on the contour line, fashioned contour can be mellow and smooth like this, does not need the later stage to polish slightly again. And after the clamping frame belt is driven to rotate, the single-layer profile is formed and lifted by one layer, the clamping frame belt can rotate, so that the spray head can fully wash the lower circumferential profile, and soft resin which is not wound and is completely cured is eliminated.

The solution plate comprises a groove plate, the groove plate is a circular vessel, the opening of the groove plate is upward, an annular weir is arranged in the circular groove at the upper part of the groove plate, the weir divides the circular groove of the groove plate into an inner groove and a discharge groove, the height of the weir is lower than the outer edge of the groove plate, and the discharge groove is outwards provided with a discharge port; the spray head also sprays the photosensitive solution, and the projection of the head of the spray head on the plane of the groove plate is positioned in the inner groove. The solution plate is a plate body for storing the solution to be molded, the thickness of a single layer needs to be strictly controlled, but each layer needs to be fully filled, so the invention adopts a mode of excessive addition and overflow, the spray head is a resin solution adding port which washes the solution falling into the inner groove when the profile is molded, the excessive solution passes through the weir bank to be discharged from the discharge port, the solution discharged from the discharge port is collected, impurities are filtered out, and then the solution is circularly supplemented to the solution source of the spray head again. In order to eliminate the liquid level of the inner tank from being raised due to the surface tension of the solution, an ultrasonic micro-vibrator can be arranged on the side surface of the solution plate to fully level the liquid level in the inner tank.

Furthermore, the inner and outer surfaces of the slot plate are coated with transparent hydrophobic layers. Since the solution is a thin layer during the formation of a single layer, in order to make the photosensitive solution smoothly flow in the well plate, the surface of the well plate is coated with a hydrophobic layer to prevent the solution from blocking the flow due to the adhesion force with the well plate, and the solution plate needs to have complete transparency, so the hydrophobic layer naturally needs to be transparent.

As optimization, the upper surface of the light-transmitting plate is coated with a transparent hydrophobic layer. Some of the photosensitive solution may splash from the solution plate onto the upper surface of the light-transmitting plate, and if the drop of photosensitive solution remains on the upper surface of the light-transmitting plate, when it is irradiated with ultraviolet rays, it is cured and formed on the upper surface of the light-transmitting plate, affecting the light-transmitting performance of the light-transmitting plate.

Further, the light source includes face and laser instrument, and the bottom in the shell is installed to the face, is equipped with the laser instrument of a plurality of equipartitions on the upper surface of face, and the back of laser instrument is equipped with universal rotary drive, and the light-emitting direction scope of laser instrument is a toper space.

The ultraviolet ray of vertical upwards transmission, it is inconvenient to construct the thickness side of slope on the sideline of individual layer profile, can only realize meticulous printing through the thickness that reduces each layer, however, receive the mobility influence of solution, individual layer thickness can not infinitely reduce, therefore, in order to construct on the profile slope, design the light source as direction adjustable ray point source, the universal rotation of laser back makes it can emit ultraviolet ray toward a cone space, a plurality of lasers constitute the dot matrix, the light that the laser sent becomes the angle and jets into photosensitive solution in specific sideline department, thereby have an angle on the edge of solidification zone, this angle and former model are at this layer, the angle of this department matches, thereby construct the slope side on the individual layer. The different positions of the contour lines have different slopes, so that the action is created by multiple lasers and multi-angle firing.

The light source is a plane parallel light source. The point light source has different illumination intensity to the shaping of level, probably influences shaping speed, leads to the material inhomogeneous, and is few to the profile upper surface, all is the article of regular shape, can adopt face parallel light source to shine to can be at the uniform velocity solidification in photosensitive solution's shaping district.

Further, a light absorbing layer is coated on the inner wall surface of the housing. The inner part of the shell is provided with a black box, preferably only one light path of a light source-a light-transmitting plate-a solution plate-a photosensitive solution exists, however, ultraviolet rays emitted by the light source can hardly have diffuse reflection to enable the ultraviolet rays to reach some unexpected positions, so that a light absorption layer coated on the inner wall surface of the shell absorbs corresponding reflected ultraviolet rays, and the reflected ultraviolet rays are prevented from irradiating the photosensitive solution to cause curing after being reflected for multiple times.

Compared with the prior art, the invention has the beneficial effects that: printing in a layer-by-layer forming mode, forming transparent areas with different shapes by printing of each layer through a light transmitting plate, irradiating the photosensitive solution through the transparent areas by ultraviolet rays for curing and forming, keeping the solution behind a shielding area in a solution state in a solution plate, curing the irradiated photosensitive solution and adhering a process boss as a first printing layer of an original model, moving a clamping frame upwards after the single-layer curing is finished, forming the outline of the next layer, periodically performing the process until the outline printing of all the layers is finished, taking down the object from the clamping frame, and cutting off the process boss to obtain the original model; the raw material cost is low, the device does not need a complex manipulator driving mechanism, the shape is completely formed by depending on an electric signal pattern, the outline shape can be ensured, and the control reliability is greatly improved.

Drawings

In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

FIG. 1 is a perspective view of a model object to be printed;

FIG. 2 is a schematic view of a hierarchical outline of a model object to be printed;

FIG. 3 is a schematic view of the overall structure of the present invention;

FIG. 4 is view A of FIG. 3;

FIG. 5 is a schematic view of a solution plate according to the present invention;

FIG. 6 is a schematic diagram of the operation of the light source of the present invention as a lattice radiation source.

In the figure: 1-shell, 2-holding frame, 3-light source, 31-plate surface, 32-laser, 4-light-transmitting plate, 5-solution plate, 51-groove plate, 52-inner groove, 53-weir dam, 54-discharge groove, 55-discharge port, 6-photosensitive solution, 7-spray head, 9-object, 91-original model and 92-technological boss.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-3, a many shower nozzles coordinated type machinery three-dimensional inkjet printer based on level profile coupling for print article 9, three-dimensional inkjet printer includes shell 1, holding frame 2, light source 3, light-passing board 4, solution board 5, the top sets up holding frame 2 that the chuck is down in the shell 1, holding frame 2 can be followed vertical direction and moved, the bottommost portion sets up light source 3 in the shell 1, light source 3 launches the ultraviolet ray up, solution board 5 sets up between holding frame 2 and light source 3, be filled with one deck photosensitive solution 6 in the solution board 5, solution board 5 is the transparent body, set up light-passing board 4 between solution board 5 and the light source 3, accessible signal control forms transparent area and shelters from the district on the light-passing board 4.

The object 9 is a continuous whole, therefore, each layer is continuous up and down, the outline of each layer is overlapped with the outline of the upper side and the outline of the lower side in a crossing way, the slight difference of the outline forms the shape change of the outer surface, as shown in figure 1, an axis in the length direction of the object 9 is selected, then, planes are used for cutting the object 9 perpendicular to the axis, as shown in figure 2, one plane cuts a layer shape of the object 9, and the invention finally prints the whole object 9 through continuous layer shape forming.

The layer-level shape is formed by a light curing principle, as shown in fig. 3 and 4, a layer of photosensitive resin solution is contained in the solution plate 5, ultraviolet rays emitted upwards by the light source 3 can reach the solution plate 5 only by penetrating through the light-transmitting plate 4, and the solution plate 5 is a transparent body. The light transmission plate 4 is a region selective light transmission part, and can complete the realization of different regions and shapes through signal control, when in forming, the transparent region at the center of the light transmission plate 4 is the shape of a layer to be formed, the shielding region blocks ultraviolet rays, so that the photosensitive solution in the solution plate 5 at the back is not cured, the liquid flow state is kept, the cured resin is adhered with the previous layer, then, the clamping frame 2 clamps the semi-finished product of the object 9 and moves upwards by a level height, the next layer of contour forming is carried out, only the cured resin is lifted and moved upwards, the solution resin still sinks in the solution plate 5, when the next layer of contour forming, the photosensitive solution is supplemented in the solution plate 5, and then the shape of the transparent region of the light transmission plate 4 is changed, thereby the contour of the next layer is formed. In this way, the printing operation is completed until the final layer of the outline of the object 9 is printed.

The signal of the shape of the transparent area of the light transmission plate 4 comes from a computer, the computer carries out layered processing on the original model 91 in three-dimensional software to obtain a coordinate quantity signal of each layer, and then the coordinate quantity signal is led into the signal area of the light transmission plate 4, and the pattern forming is similar to that of a liquid crystal panel.

As shown in fig. 3, since the holder 2 needs to hold a part of the object 9 in advance, and the first layer contour is not printed at the beginning, a process boss 92 is needed to hold the holder 2, the process boss 92 is a resin body prepared in advance, and is held and soaked in the photosensitive solution, so that the first layer of the original model 91 has an attachment, and then the process boss 92 is continuously lifted to print a new layer of the lower layer, and after printing is finished, the original model can be obtained by cutting off the process boss 92 with a cutter. The dummy block 92 is preferably disposed on the flat surface of the original mold 91, or on a curved surface, which is not easy to cut.

As shown in fig. 3 and 4, the three-dimensional printer further includes a plurality of nozzles 7, the nozzles 7 are located above the solution plate 5 and are inclined downward toward the central axis of the printer, and the nozzles 7 are driven to move in the horizontal plane.

The spray head 7 faces downwards to the edge of the outline when each layer is printed in an inclined mode, after each layer of printing is finished, the spray head 7 sprays solution with the same components to clean uncured solution adhered to the edge of the outline, more importantly, when each layer of the outline is formed, an intermediate area between curing and non-curing exists on the boundary line of the outline, some partially-cured resin is in a softening state and exists on the boundary line, the solution is different from the solution and can be separated from a curing body, the solution in the softening state can be in a silk-like shape and adhered to the outline, and therefore the silk-like uncured body needs to be washed out.

As shown in fig. 3, the holder 2 is further provided with a rotary drive with the vertical central axis of the printer as an axis, and the vertical movement of the holder 2 and the rotation around the vertical axis run at intervals. The holding frame 2 carries out rotary motion at the end stage of individual layer shape forming process, and the pattern on the light-passing board 4 also carries out the rotation of same speed to make near the silk wadding form semi-solid silk thread rotation winding of contour line on the contour line, fashioned contour can be mellow and smooth like this, does not need the later stage to polish slightly again. And after the clamping frame 2 is driven to rotate on the belt, the single-layer profile is formed and lifted by one layer, the clamping frame can rotate, so that the spray head 7 can fully wash the lower circumferential profile, and soft resin which is not wound and is completely cured is eliminated.

As shown in fig. 5, the solution plate 5 includes a trough plate 51, the trough plate 51 is a circular vessel, the opening of the trough plate 51 is upward, an annular weir 53 is provided in the upper circular groove of the trough plate 51, the weir 53 divides the circular groove of the trough plate 51 into an inner groove 52 and a discharge groove 54, the height of the weir 53 is lower than the outer edge of the trough plate 51, and the discharge groove 54 is provided with a discharge opening 55 facing outward; the spray head 7 also sprays the photosensitive solution 6, and the projection of the head of the spray head 7 on the plane of the well plate 51 is located in the inner well 52. The solution plate 5 is a plate body for storing the solution to be molded, the thickness of a single layer needs to be strictly controlled, but each layer needs to be fully filled, so the invention adopts a mode of excessive addition and overflow, the spray head 7 is a resin solution adding port which washes the solution when the profile is molded and falls into the inner groove 52, the excessive solution passes through the weir embankment 53 to be discharged into the discharge groove 54 and is discharged from the discharge port 55, the solution discharged from the discharge port 55 is collected, impurities are filtered, and then the solution is circularly supplemented to the solution source of the spray head 7 again. In order to eliminate the liquid level of the inner tank 52 from rising due to the surface tension of the solution, an ultrasonic micro-vibrator may be provided on the side of the solution plate 5 to sufficiently level the liquid level in the inner tank 52.

The inner and outer surfaces of the well plate 51 are coated with a transparent hydrophobic layer. Since the solution is thin when the single layer is formed, in order for the photosensitive solution to smoothly flow in the well plate 51, the surface of the well plate 51 is coated with the hydrophobic layer to prevent the blocking of the flow due to the adhesion force of the solution to the well plate 51, and the solution plate 5 needs to have complete transparency, the hydrophobic layer naturally needs to be transparent.

The upper surface of the light-transmitting plate 4 is coated with a transparent hydrophobic layer. Some of the photosensitive solution may splash from the solution plate 5 onto the upper surface of the light-transmitting plate 4, and if the drop of the photosensitive solution remains on the upper surface of the light-transmitting plate 4, when it is irradiated with ultraviolet rays, it is cured and formed on the upper surface of the light-transmitting plate 4, affecting the light-transmitting property of the light-transmitting plate 4.

As shown in fig. 6, the light source 3 includes a board 31 and a laser 32, the board 31 is installed at the bottom of the housing 1, a plurality of uniformly distributed lasers 32 are arranged on the upper surface of the board 31, a universal rotation drive is arranged on the back surface of the lasers 32, and the light emitting direction range of the lasers 32 is a conical space.

The ultraviolet ray emitted vertically upwards is inconvenient to construct an inclined thickness side on the side line of the outline of the single layer, and the fine printing can be realized only by reducing the thickness of each layer, however, the thickness of the single layer cannot be infinitely reduced due to the influence of the fluidity of the solution, so that, in order to construct the inclined outline, the light source 3 is designed as a ray point source with adjustable direction, the ultraviolet ray can be emitted into a conical space by the universal rotation of the back of the laser 32, a plurality of lasers form a dot matrix, the light emitted by the lasers is emitted into the photosensitive solution 6 at an angle at a specific side line, as shown in fig. 6, so that the edge of the curing area has an angle which is matched with the angle of the original model at the layer, so as to construct the inclined side on the single layer. The different positions of the contour lines have different slopes so that the action is created by multiple lasers 32 and multiple angle shots.

Besides the light emitting body with the adjustable direction of the lattice ray, the light source 3 can also be set as a plane parallel light source. The point light source has different illumination intensity to the shaping of level, may influence shaping speed, leads to the material inhomogeneous to going on, and is few to the profile upper surface, all is regular shape's article 9, can adopt the face parallel light source to shine to can be at the uniform velocity solidification in photosensitive solution 6's shaping district.

The inner wall surface of the housing 1 is coated with a light absorbing layer. A black box is arranged in the shell 1, and preferably only one light path of the light source 3-the light-transmitting plate 4-the solution plate 5-the photosensitive solution 6 exists, however, the ultraviolet rays emitted by the light source 3 can hardly have some diffuse reflection to enable the ultraviolet rays to reach some unexpected positions, so that a light absorption layer coated on the inner wall surface of the shell 1 absorbs corresponding reflected ultraviolet rays, and the reflected ultraviolet rays are prevented from irradiating the photosensitive solution to cause curing after being reflected for multiple times.

The main operation process of the device is as follows: clamping a pre-formed regular process boss 92 on a clamping frame 92, moving the clamping frame 92 downwards, immersing the lower surface of the process boss 92 into the photosensitive solution 6 in the solution plate 5, then controlling the light-transmitting plate 4 through signals to form a transparent area and a shielding area with a certain shape, irradiating the photosensitive solution 6 after ultraviolet rays emitted by the light source 3 below the light-transmitting plate 4 penetrate through the transparent area, curing the irradiated photosensitive solution 6 and adhering the process boss 92 to be used as a first printing layer of the original model 91, turning off the light source 3 after single-layer curing is finished, moving the clamping frame 92 upwards, refilling the solution plate 5 with a proper amount of solution, then forming a next transparent area with a next layer shape by the light-transmitting plate 4, then emitting ultraviolet rays by the light source 3, carrying out next layer profile forming in the cycle until the profiles of all levels are printed, then taking off the object 9 from the clamping frame 2, the process boss 92 is cut off to obtain the original model 91.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A multi-nozzle linkage type mechanical three-dimensional printer based on hierarchical contour coupling is used for printing an object (9), and is characterized in that: the three-dimensional printer comprises a shell (1), a clamping frame (2), a light source (3), a light-transmitting plate (4) and a solution plate (5), wherein the clamping frame (2) with a downward chuck is arranged at the top in the shell (1), the clamping frame (2) can move in the vertical direction, the light source (3) is arranged at the bottommost part in the shell (1), the light source (3) emits ultraviolet rays upwards, the solution plate (5) is arranged between the clamping frame (2) and the light source (3), a layer of photosensitive solution (6) is filled in the solution plate (5), the solution plate (5) is transparent, the light-transmitting plate (4) is arranged between the solution plate (5) and the light source (3), and a transparent area and a shielding area can be formed on the light-transmitting plate (4) through signal control;

the three-dimensional printer further comprises a plurality of spray heads (7), spray orifices of the spray heads (7) are positioned above the solution plate (5) and incline downwards to face the central axis of the printer, and the spray heads (7) are driven to move on a horizontal plane;

the clamping frame (2) is also provided with a rotary drive which takes a vertical central axis of the printer as an axis, and when the clamping frame (2) rotates, the patterns on the light-transmitting plate (4) also rotate at the same speed;

the light source (3) comprises a board surface (31) and lasers (32), the board surface (31) is installed at the bottom in the shell (1), the lasers (32) are uniformly distributed on the upper surface of the board surface (31), the back of each laser (32) is provided with universal rotation drive, and the light emitting direction range of each laser (32) is a conical space;

a light absorbing layer is coated on the inner wall surface of the shell (1);

the solution plate (5) comprises a groove plate (51), the groove plate (51) is a circular vessel, the opening of the groove plate (51) faces upwards, an annular weir bank (53) is arranged in the circular groove at the upper part of the groove plate (51), the weir bank (53) divides the circular groove of the groove plate (51) into an inner groove (52) and a discharge groove (54), the height of the weir bank (53) is lower than the outer edge of the groove plate (51), and the discharge groove (54) faces outwards and is provided with a discharge opening (55); the spray head (7) also sprays the photosensitive solution (6), and the projection of the head of the spray head (7) on the plane of the groove plate (51) is positioned in the inner groove (52).

2. The multi-nozzle linkage type mechanical three-dimensional printer based on hierarchical contour coupling as claimed in claim 1, wherein: the inner and outer surfaces of the slot plate (51) are coated with transparent hydrophobic layers.

3. The multi-nozzle linkage type mechanical three-dimensional printer based on hierarchical contour coupling as claimed in claim 1, wherein: the upper surface of the light-transmitting plate (4) is coated with a transparent hydrophobic layer.