CN112440367A

CN112440367A - 3D ceramic printer

Info

Publication number: CN112440367A
Application number: CN202011294505.5A
Authority: CN
Inventors: 张硕; 刘江博闻; 樊一扬; 段戈扬
Original assignee: Kang Shuo Deyang Intelligent Manufacturing Co ltd
Current assignee: Kang Shuo Deyang Intelligent Manufacturing Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-03-05

Abstract

The invention relates to the technical field of 3D printing, in particular to a 3D ceramic printer which comprises a printer body and cleaning equipment, wherein the cleaning equipment comprises a liquid storage tank, a limiting device, a cleaning device and a collecting device; the limiting device comprises a fixing plate, and the fixing plate is enclosed to form a positioning space which is sequentially reduced in diameter from top to bottom and is matched with the outer wall of the nozzle; the cleaning device comprises a spacer, a cleaning needle, a third driving piece and a fourth driving piece; the collecting device comprises an inclined plate, a drainage groove and a collecting box; the spacer is provided with a vertical through hole; spacer one end links to each other with the fixed plate, and the other end downward sloping links to each other with holding the thing platform, it links to each other with the hang plate to hold the thing platform other end, the hang plate other end stretches into in the water drainage tank, all be equipped with the guiding gutter that is linked together on spacer, holding thing platform and the hang plate. Through this 3D ceramic printer, the problem that the clearance effect that can effectively solve the nozzle is poor and clearance in-process nozzle easily shifts.

Description

3D ceramic printer

Technical Field

The invention relates to the technical field of 3D printing, in particular to a 3D ceramic printer.

Background

The 3D printer needs to eject and stack raw materials into thin layers through nozzles when printing, so that a three-dimensional model is formed. The printing raw and other materials medium of 3D ceramic printer is ceramic powder etc. in the use, blocks up the nozzle of nozzle easily, needs in time to close the nozzle and uses the clearance instrument to clear up the nozzle, closes the nozzle through operating software during the clearance, moves away the nozzle again and makes it leave the model in the printing, takes off raw and other materials from the nozzle, prevents further jam, clears away the remaining raw and other materials of nozzle, reopens the nozzle work. The efficiency is slow and the treatment can only be done manually.

In the prior art, a chinese utility model patent document with publication number CN208376025U and publication date of 2019, 01, 15 is proposed to solve the above existing technical problems, and the technical scheme disclosed in the patent document is as follows: the utility model provides a 3D printer with nozzle clearance function, which comprises a housin, casing the place ahead is provided with the operation viewing aperture, it beats printer head to set up 3D in the casing, the mobile device that the printer head removed is beaten to drive 3D, a cleaning device for printing material fashioned print platform and clearance waste silk, cleaning device includes waste material box, scraper and scraper height compensation structure, the waste material import has been seted up to waste material box top, still include waste material box height adjusting mechanism, mobile device drive 3D beats printer head, make and print nozzle contact scraper and realize once clearing up the back, drive 3D beats printer head reverse movement and realizes the secondary clearance.

In the actual use process, the following problems can occur in the technical scheme:

(1) the scraper can only clean the outside of the nozzle, and cannot clean the inside of the nozzle, so that the cleaning effect is poor.

(2) When the scraper is used for cleaning the nozzle, the position of the nozzle can be deviated under the action of the scraper, and the like.

Disclosure of Invention

In order to solve the technical problems, the invention provides a 3D ceramic printer which can effectively solve the problems that the cleaning effect of a nozzle is poor and the nozzle is easy to shift in the cleaning process.

The invention is realized by adopting the following technical scheme:

the utility model provides a 3D ceramic printer, includes printer body, printer body includes the nozzle, holds the first driving piece that thing platform, drive nozzle removed and the second driving piece that the drive holds the thing platform and removes, its characterized in that: the cleaning device comprises a liquid storage tank, a limiting device, a cleaning device and a collecting device; the feed inlet of the nozzle is connected with the liquid storage tank through a liquid guide pipe; the limiting device comprises a fixing plate, the fixing plate is enclosed to form a positioning space, and the positioning space is sequentially reduced in diameter from top to bottom and is matched with the outer wall of the nozzle; the cleaning device comprises a spacer, a cleaning needle positioned below the spacer, a third driving piece driving the cleaning needle to lift up and down and a fourth driving piece driving the cleaning needle to rotate; the collecting device comprises an inclined plate, a water draining groove and a collecting box communicated with the water draining groove, and the water draining groove is arranged along the inner wall of the printer body; the spacer is provided with a vertical through hole matched with the cleaning needle; the widths of the spacer, the object bearing platform and the inclined plate are matched; spacer one end links to each other with the fixed plate, and the other end downward sloping links to each other with holding the thing platform, it links to each other with the hang plate to hold the thing platform other end, the hang plate other end stretches into in the water drainage tank, all be equipped with the guiding gutter that is linked together on spacer, holding thing platform and the hang plate.

And blocking pieces are arranged on the side edges of the spacer, the object bearing platform and the inclined plate.

The printer further comprises a drying device with an air inlet, wherein the drying device comprises a heating sheet and a fan which are fixed on the inner wall of the printer body.

A sponge layer is arranged in the through hole.

An annular groove is formed in the through hole, a fixing ring is clamped in the annular groove, and the sponge layer is fixed in the fixing ring.

The fixed plate comprises an outer layer structure and an inner layer structure formed by four movable plates, the movable plates are connected with the outer layer structure through springs respectively, and the inclination of the movable plates is matched with that of the outer wall of the nozzle.

The upper end and the lower end of the movable plate are connected with the outer layer structure through springs respectively.

The feed inlet of the spray head comprises a powder inlet and a high-pressure water pipe connecting port which are arranged side by side, and the liquid guide pipe is communicated with the high-pressure water pipe connecting port.

The drainage channel is inclined towards the collecting box.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the 3D ceramic printer, the cleaning equipment is additionally arranged, so that the nozzle and the object bearing table can be well cleaned. In the cleaning process of the nozzle, the cleaning needle is firstly utilized to clean, and then the nozzle is washed by water flow, so that the cleaning effect is better.

In the cleaning process of the cleaning needle, the limiting device can limit the position of the nozzle, so that the cleaning needle can accurately align to the nozzle, the cleaning efficiency is higher, and the effect is better. The locating space that stop device formed undergauge in proper order from the top down, with the outer wall phase-match of nozzle, also play certain fixed action to the nozzle for in the clearance process, the nozzle is relatively more stable. Cleaning device still includes the spacer, when needs clearance, the clearance needle moves from spacer below under the effect of third driving piece, pass the through-hole, insert in the nozzle, fourth driving piece drive nozzle rotates, then the third driving piece drives the clearance needle rebound again, take away the plug, the clearance needle continues the rebound, when the plug of adhesion on the clearance needle meets the through-hole, the peripheral spacer of through-hole can play the effect of scraper blade, scrape down the plug on the clearance needle, avoid the plug to accumulate on the clearance needle, influence clearance effect next time.

When the nozzle is washed by water flow, the spacer, the object bearing platform and the inclined plate are all provided with the flow guide grooves which are communicated, so that the water flow can flow to the drainage groove along the flow guide grooves after the nozzle is washed and then flows to the collection box. Under the scouring action of water flow, the powder remained in the nozzle, the blockage brought out by the cleaning needle and the powder remained on the object bearing platform can be washed away, and the cleaning is more thorough.

2. The side of spacer, holding thing platform and hang plate all is equipped with the separation blade, further limits the flow direction of rivers, avoids rivers to flow from both sides, influences the clearance effect.

3. The drying device comprises a heating sheet and a fan which are fixed on the inner wall of the printer body, hot air is formed, and moisture in the printer body can be effectively taken away.

4. Be equipped with the sponge layer in the through-hole, the sponge layer can further clear up the clearance needle after the clearance is accomplished, and when using once more, the sponge can clear up the clearance needle earlier, and the clearance needle clears up the nozzle again, and the effect of clearance is better to can adsorb certain moisture.

5. The cleaning device is characterized in that an annular groove is formed in the through hole, a fixing ring is clamped in the annular groove, the sponge layer is fixed in the fixing ring, and the sponge layer can be firmly fixed through the cooperation of the annular groove and the fixing ring, so that the cleaning needle is prevented from being taken out of the through hole in the up-and-down moving process, and the sponge layer cannot play a role.

6. The fixed plate includes outer layer structure and the inner layer structure who constitutes by four fly leafs, the fly leaf links to each other with outer layer structure through the spring respectively, the gradient of fly leaf and the gradient phase-match of nozzle outer wall, because the fly leaf links to each other with outer layer structure through the spring respectively, through the flexible of spring, make the fly leaf enclose the size of closing the space that forms indefinite, can adjust according to the concrete size of nozzle, the nozzle moves down, the outer wall of nozzle forms the extrusion to the fly leaf in proper order, the reaction force of spring makes the fly leaf can further apply the effort to the nozzle, make the fixed of nozzle better with limiting displacement, and can be applicable to not unidimensional nozzle, and the suitability is stronger.

7. Both ends link to each other with outer layer structure through the spring respectively about the fly leaf for the fly leaf removes more stably under the effect of spring, and is better to the fixed effect of nozzle.

8. The feed inlet of shower nozzle includes powder import and high pressure water pipe connector side by side, the catheter is linked together with high pressure water pipe connector, and the clearance effect of high pressure rivers is better to powder import and high pressure water pipe connector set up side by side for need not demolish the connection of powder when the clearance, make the structure simpler.

9. The water drainage tank is towards the slope form of collecting box slope, the impurity such as water, powder and the jam after the better collection clearance of being convenient for.

Drawings

The invention will be described in further detail with reference to the following description taken in conjunction with the accompanying drawings and detailed description, in which:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic plan view of the spacer, the object-bearing table and the inclined plate according to the present invention;

FIG. 3 is an enlarged schematic view of region A of the present invention;

the labels in the figure are:

1. printer body, 2, nozzle, 3, object bearing platform, 4, first driving piece, 5, second driving piece, 6, liquid storage box, 7, collecting box, 8, powder import, 9, high pressure water pipe connector, 10, catheter, 11, outer layer structure, 12, transition board, 13, movable board, 14, spring, 15, spacer, 16, cleaning pin, 17, third driving piece, 18, fourth driving piece, 19, hang plate, 20, water drainage tank, 21, guiding gutter, 22, spacer, 23, through-hole, 24, annular groove, 25, retainer ring, 26, sponge layer, 27, heating plate, 28, fan, 29, air outlet.

Detailed Description

Example 1

As a basic embodiment of the invention, the invention comprises a 3D ceramic printer which comprises a printer body 1, wherein the printer body 1 comprises a nozzle 2, a cleaning device, a bearing table 3, a first driving part 4 for driving the nozzle 2 to move and a second driving part 5 for driving the bearing table 3 to move. The nozzle 2, the object bearing table 3, the first driving member 4 and the second driving member 5 are conventional structures, and the present invention does not improve the structures, and thus, a detailed description thereof will not be given.

The cleaning equipment comprises a liquid storage tank 6, a limiting device, a cleaning device and a collecting device. The feed inlet of the nozzle 2 is connected with the liquid storage tank 6 through a liquid guide pipe 10. The nozzle 2 is in a quadrangular frustum pyramid shape. Stop device includes the fixed plate, and this fixed plate is hollow quadrangular frustum pyramid form, and this fixed plate encloses to close and forms the location space, location space from the top down is the undergauge in proper order, with nozzle 2's outer wall phase-match for nozzle 2 is from last down can slowly insert this location space and block in this location space. The cleaning device comprises a spacer 15, a cleaning needle 16 positioned below the spacer 15, a third driving piece 17 driving the cleaning needle 16 to lift up and down, and a fourth driving piece 18 driving the cleaning needle 16 to rotate. One end of the spacer 15 is connected with the fixed plate, and the other end of the spacer is downwards inclined and connected with the object bearing platform 3. The spacer 15 is provided with a vertical through hole 23 matched with the cleaning needle 16.

Under the drive of the third driving part 17, the cleaning needle 16 can upwards penetrate through the through hole 23 to penetrate into the nozzle 2 fixed in the positioned space, the fourth driving part 18 drives the cleaning needle 16 to rotate and fully contact with a blockage in the nozzle 2, the third driving part 17 drives the cleaning needle 16 to downwards move, the blockage is taken out by the cleaning needle 16, the cleaning needle 16 continuously downwards moves, and when the cleaning needle passes through the through hole 23, the spacer 15 at the periphery of the through hole 23 plays a role of a scraper and can scrape the blockage on the cleaning needle 16, so that the blockage is accumulated on the scraper.

The collecting device comprises an inclined plate 19, a water draining groove 20 and a collecting box 7 communicated with the water draining groove 20, wherein the water draining groove 20 is arranged along the inner wall of the printer body 1. The widths of the spacer 15, the object bearing table 3 and the inclined plate 19 are matched. The other end of the object bearing platform 3 is connected with an inclined plate 19, the other end of the inclined plate 19 extends into a drainage groove 20, and the partition piece 15, the object bearing platform 3 and the inclined plate 19 are provided with a flow guide groove 21 communicated with each other.

Example 2

As a preferred embodiment of the invention, the invention comprises a 3D ceramic printer, which comprises a printer body 1, wherein the printer body 1 comprises a nozzle 2, a cleaning device, a bearing table 3, a first driving piece 4 for driving the nozzle 2 to move, a second driving piece 5 for driving the bearing table 3 to move and a drying device with an air inlet.

The cleaning equipment comprises a liquid storage tank 6, a limiting device, a cleaning device and a collecting device. The feed inlet of the nozzle 2 is connected with the liquid storage tank 6 through a liquid guide pipe 10. Nozzle 2 is four prismatic table forms, stop device includes the fixed plate, the fixed plate includes four consecutive connecting plates, the connecting plate has certain gradient, and this gradient and the gradient phase-match of 2 outer walls of nozzle, four connecting plates link to each other in proper order and enclose and close and form the location space, location space from the top down is undergauge in proper order, with the outer wall phase-match of nozzle 2. The cleaning device comprises a spacer 15, a cleaning needle 16 positioned below the spacer 15, a supporting platform, a third driving piece 17 driving the cleaning needle 16 to lift up and down, and a fourth driving piece 18 driving the cleaning needle 16 to rotate. The third driving member 17 may be a cylinder, and the fourth driving member 18 may be a rotating electric machine. The cleaning needle 16 is connected with a driving shaft of a rotating motor, the rotating motor can be fixed on the supporting platform, and a piston rod of the air cylinder is connected with the lower surface of the supporting platform, so that the third driving part 17 can simultaneously drive the cleaning needle 16 and the fourth driving part 18 to ascend and descend.

The collecting device comprises an inclined plate 19, a water draining groove 20 and a collecting box 7 communicated with the water draining groove 20, wherein the water draining groove 20 is arranged along the inner wall of the printer body 1. The widths of the spacer 15, the object bearing table 3 and the inclined plate 19 are matched. One end of the spacer 15 is connected with the fixed plate, and the other end of the spacer is downwards inclined and connected with the object bearing platform 3. The spacer 15 is provided with a vertical through hole 23 matched with the cleaning needle 16. The other end of the object bearing table 3 is connected with the inclined plate 19, the other end of the inclined plate 19 extends into the drainage groove 20, the partition piece 15, the object bearing table 3 and the inclined plate 19 are provided with flow guide grooves 21 communicated with each other, and the partition piece 15, the object bearing table 3 and the inclined plate 19 are provided with baffle pieces 22 on the side edges.

Drying device is including fixing heating plate 27 and the fan 28 at printer body 1 inner wall, and air outlet 29 can set up at 3D ceramic printer's top, realizes hot-blast natural rising.

Example 3

As another preferred embodiment of the invention, the invention comprises a 3D ceramic printer, which comprises a printer body 1, wherein the printer body 1 comprises a nozzle 2, a cleaning device, a bearing table 3, a first driving part 4 for driving the nozzle 2 to move and a second driving part 5 for driving the bearing table 3 to move. The cleaning equipment comprises a liquid storage tank 6, a limiting device, a cleaning device and a collecting device.

The feed inlet of the nozzle 2 is connected with the liquid storage tank 6 through the liquid guide pipe 10, the feed inlet is provided with threads, corresponding threads are also arranged at the joint of the liquid guide pipe 10 and the feed inlet, the liquid guide pipe 10 is movably connected with the feed inlet, when the cleaning is needed, the feeding device of the 3D ceramic printer is separated from the feed inlet, and the liquid guide pipe 10 is connected with the feed inlet.

The limiting device comprises a fixing plate, and the fixing plate comprises an outer-layer structure 11 and an inner-layer structure formed by four movable plates 13. The nozzle 2 is in a quadrangular frustum pyramid shape, the outer layer structure 11 is also in a quadrangular frustum pyramid shape, the inclination of the movable plate 13 is matched with the inclination of the outer wall of the nozzle 2, and the inclination of the outer layer structure 11 can be slightly larger than the inclination of the outer wall of the nozzle 2. The movable plate 13 is connected to the outer layer 11 through springs 14, and specifically, the upper and lower ends of the movable plate 13 are connected to the outer layer 11 through springs 14. After the movable plates 13 are connected with the outer layer structure 11, the four movable plates 13 are enclosed to form a positioning space, and the positioning space is sequentially reduced in diameter from top to bottom and is matched with the outer wall of the nozzle 2.

The cleaning device comprises a spacer 15, a cleaning needle 16 positioned below the spacer 15, a third driving piece 17 driving the cleaning needle 16 to lift up and down, and a fourth driving piece 18 driving the cleaning needle 16 to rotate. The collecting device comprises an inclined plate 19, a water draining groove 20 and a collecting box 7 communicated with the water draining groove 20, wherein the water draining groove 20 is arranged along the inner wall of the printer body 1. The widths of the spacer 15, the object bearing table 3 and the inclined plate 19 are matched. One end of the spacer 15 is connected with the fixed plate, and the other end of the spacer is downwards inclined and connected with the object bearing platform 3. The other end of the object bearing platform 3 is connected with an inclined plate 19, the other end of the inclined plate 19 extends into a drainage groove 20, and the partition piece 15, the object bearing platform 3 and the inclined plate 19 are provided with a flow guide groove 21 communicated with each other.

The spacer 15 is provided with a vertical through hole 23 matched with the cleaning needle 16. An annular groove 24 is formed in the through hole 23, a fixing ring 25 is clamped in the annular groove 24, a sponge layer 26 is fixed in the fixing ring 25, the fixing ring 25 fixes the edge of the sponge layer 26, and the sponge layer 26 is prevented from moving up and down along with the cleaning needle 16.

Example 4

As the best mode of the invention, referring to the attached drawings 1 and 2 in the specification, the invention comprises a 3D ceramic printer which comprises a printer body 1 and a cleaning device. The printer body 1 comprises a nozzle 2, an object bearing table 3, a first driving piece 4 for driving the nozzle 2 to move, a second driving piece 5 for driving the object bearing table 3 to move and a drying device with an air inlet. The cleaning equipment comprises a liquid storage tank 6, a limiting device, a cleaning device and a collecting device. The feed inlet of the spray head comprises a powder inlet 8 and a high-pressure water pipe connecting port 9 which are arranged side by side, and the high-pressure water pipe connecting port 9 is communicated with the liquid storage tank 6 through a liquid guide pipe 10.

The limiting device comprises a fixed plate and a transition plate 12 which are connected. The fixed plate comprises an outer layer structure 11 and an inner layer structure formed by four movable plates 13. The movable plate 13 is connected to the outer layer 11 through springs 14, specifically, the upper and lower ends of the movable plate 13 are connected to the outer layer 11 through springs 14, and the left and right ends of the movable plate 13 are also connected to the outer layer 11 through springs 14. Nozzle 2 is four prismatic table forms, outer structure 11 is hollow four prismatic table forms, and the gradient of fly leaf 13 and outer structure 11 all with the gradient phase-match of 2 outer walls of nozzle, fly leaf 13 after the connection encloses and closes and form the location space, location space from the top down is the undergauge in proper order, with the outer wall phase-match of nozzle 2.

The cleaning device comprises a spacer 15, a cleaning needle 16 positioned below the spacer 15, a third driving piece 17 driving the cleaning needle 16 to lift up and down, and a fourth driving piece 18 driving the cleaning needle 16 to rotate. The third driving member 17 and the fourth driving member 18 can be conventional mechanical devices, and the present invention is not limited to specific mechanical devices as long as the lifting and rotating can be achieved. The fourth driving member 18 may be connected to the cleaning needle 16, and the third driving member 17 may be connected to the fourth driving member 18, so that the third driving member 17 can simultaneously drive the fourth driving member 18 and the cleaning needle 16 to move up and down.

The collecting device comprises an inclined plate 19, a water draining groove 20 and a collecting box 7 communicated with the water draining groove 20, wherein the water draining groove 20 is arranged along the inner wall of the printer body 1 and is inclined towards the collecting box 7. The widths of the spacer 15, the object bearing table 3 and the inclined plate 19 are matched, one end of the spacer 15 is connected with the fixed plate, and the other end of the spacer inclines downwards to be connected with the object bearing table 3. The other end of the object bearing platform 3 is connected with an inclined plate 19, and the other end of the inclined plate 19 extends into a drainage groove 20. The partition 15, the object bearing table 3 and the inclined plate 19 are all provided with a flow guide groove 21 communicated with each other, and the side edges of the partition 15, the object bearing table 3 and the inclined plate 19 are all provided with a baffle plate 22.

Referring to the attached figure 3 of the specification, the spacer 15 is provided with a through hole 23 matched with the outer diameter of the cleaning needle 16. An annular groove 24 is formed in the through hole 23, a fixing ring 25 is clamped in the annular groove 24, and a sponge layer 26 is fixed on the fixing ring 25.

Drying device is including fixing heating sheet 27 and the fan 28 at printer body 1 inner wall, printer body 1's top can be equipped with air outlet 29, can be so that the natural wind heaies up through heating sheet 27, and fan 28 rises again after blowing it to printer body 1's inside, takes away unnecessary moisture, avoids excessively moist in the printer body 1 after the washing.

When needs clearance, fix this cleaning equipment in printer body 1, when needs clearance nozzle 2, nozzle 2 is from the drive assembly who takes first driving piece 4 and second driving piece 5 promptly, and drive nozzle 2 removes towards cleaning equipment. The nozzle 2 is slowly moved downwards, the nozzle 2 is inserted into the positioning space formed by the movable plate 13, and as the outer diameter of the nozzle 2 inserted gradually increases, the nozzle 2 exerts an acting force on the movable plate 13, the spring 14 is compressed, a reaction force is given to the nozzle 2, and the nozzle 2 is fixed until the nozzle 2 can not move downwards any more. The third driving piece 17 drives the fourth driving piece 18 and the cleaning needle 16 to move upwards at the same time, the cleaning needle 16 penetrates through the through hole 23 and is inserted into the nozzle 2, the fourth driving piece 18 drives the driving piece to rotate, the third driving piece 17 drives the cleaning needle 16 to move downwards and takes out the blockage in the nozzle 2, the fourth driving piece 18 stops driving, the third driving piece 17 drives the cleaning needle 16 to continue to move downwards, and after the filtering and cleaning of the sponge layer 26, the cleaning needle is returned to enable the cleaning needle 16 to be located below the spacer 15. In this process, the fourth drive element 18 can also be operated until cleaning is complete.

After the cleaning device finishes cleaning, high-pressure water flows into the nozzle 2 from the high-pressure water pipe connector 9, flows to the partition 15 along the nozzle 2, takes away the blockage brought out by the cleaning needle 16 along the water flow direction, cleans the object bearing table 3 when passing through the object bearing table 3, finally flows into the drainage groove 20 along the inclined plate 19, and enters the collecting device along the direction of the drainage groove 20. And after cleaning is finished, opening the drying device to dry for a certain time.

In summary, after reading the present disclosure, those skilled in the art should make various other modifications without creative efforts according to the technical solutions and concepts of the present disclosure, which are within the protection scope of the present disclosure.

Claims

1. The utility model provides a 3D ceramic printer, includes printer body (1), printer body (1) includes nozzle (2), holds first driving piece (4) and drive that thing platform (3) removed were held in object platform (3) removal and second driving piece (5) of drive, its characterized in that: the cleaning device comprises a liquid storage tank (6), a limiting device, a cleaning device and a collecting device; the feed inlet of the nozzle (2) is connected with the liquid storage tank (6) through a liquid guide pipe (10); the limiting device comprises a fixing plate, the fixing plate is enclosed to form a positioning space, and the positioning space is sequentially reduced in diameter from top to bottom and is matched with the outer wall of the nozzle (2); the cleaning device comprises a spacer (15), a cleaning needle (16) positioned below the spacer (15), a third driving piece (17) for driving the cleaning needle (16) to lift up and down and a fourth driving piece (18) for driving the cleaning needle (16) to rotate; the collecting device comprises an inclined plate (19), a water draining groove (20) and a collecting box (7) communicated with the water draining groove (20), and the water draining groove (20) is arranged along the inner wall of the printer body (1); the spacer (15) is provided with a vertical through hole (23) matched with the cleaning needle (16); the widths of the spacer (15), the object bearing platform (3) and the inclined plate (19) are matched; spacer (15) one end links to each other with the fixed plate, and the other end downward sloping links to each other with holding thing platform (3), hold thing platform (3) other end and link to each other with hang plate (19), hang plate (19) other end stretches into in water drainage tank (20), all be equipped with guiding gutter (21) that are linked together on spacer (15), holding thing platform (3) and hang plate (19).

2. The 3D ceramic printer of claim 1, wherein: and baffle plates (22) are arranged on the side edges of the partition (15), the object bearing platform (3) and the inclined plate (19).

3. The 3D ceramic printer of claim 2, wherein: the printer further comprises a drying device with an air inlet, wherein the drying device comprises a heating sheet (27) and a fan (28) which are fixed on the inner wall of the printer body (1).

4. A 3D ceramic printer according to claim 1 or 3, characterized in that: a sponge layer (26) is arranged in the through hole (23).

5. The 3D ceramic printer of claim 4, wherein: an annular groove (24) is formed in the through hole (23), a fixing ring (25) is clamped in the annular groove (24), and the sponge layer (26) is fixed in the fixing ring (25).

6. The 3D ceramic printer of claim 5, wherein: the fixed plate comprises an outer layer structure (11) and an inner layer structure formed by four movable plates (13), the movable plates (13) are connected with the outer layer structure (11) through springs (14), and the inclination of the movable plates (13) is matched with that of the outer wall of the nozzle (2).

7. The 3D ceramic printer of claim 6, wherein: the upper end and the lower end of the movable plate (13) are respectively connected with the outer layer structure (11) through springs (14).

8. The 3D ceramic printer of claim 3 or 7, wherein: the feed inlet of the spray head comprises a powder inlet (8) and a high-pressure water pipe connecting port (9) which are arranged side by side, and the liquid guide pipe (10) is communicated with the high-pressure water pipe connecting port (9).

9. The 3D ceramic printer of claim 8, wherein: the drainage groove (20) is inclined towards the collecting box (7).