CN108724732B

CN108724732B - 3D printer with nozzle clearance and purification performance

Info

Publication number: CN108724732B
Application number: CN201810678306.0A
Authority: CN
Inventors: 曹燕红
Original assignee: Yongkang Pufang Aluminum Co ltd
Current assignee: Yongkang Pufang Aluminum Co.,Ltd.
Priority date: 2018-06-27
Filing date: 2018-06-27
Publication date: 2020-10-23
Anticipated expiration: 2038-06-27
Also published as: CN108724732A

Abstract

The invention relates to a 3D printer with nozzle cleaning and purifying functions, which comprises a main body, a material box and a base, the main body is internally provided with a printing mechanism, a cleaning mechanism and a purifying mechanism, the purifying mechanism comprises a purifying chamber, a swinging component and a reciprocating component, the swing component comprises a connecting rod and two swing units, the swing units comprise supporting shafts, swing rods, suction nozzles and sleeves, the cleaning mechanism comprises a moving component, a supporting plate, a rotating component and a cleaning component, the rotating component comprises a first motor and a turntable, the 3D printer with the nozzle cleaning and purifying functions can realize the function of automatically cleaning the printing head through the cleaning mechanism, reduce the workload of people, and through the purifying mechanism, can purify the toxic substance that the printer released, avoid being absorbed by the human body and influence healthy, improve the security of 3D printer.

Description

3D printer with nozzle clearance and purification performance

Technical Field

The invention relates to the field of 3D printing equipment, in particular to a 3D printer with nozzle cleaning and purifying functions.

Background

The 3D printer is also called a three-dimensional printer, is an accumulative manufacturing technology, namely a machine of a rapid prototyping technology, and is a technology for manufacturing a three-dimensional object by printing a layer by layer of adhesive material by using special adhesive materials such as wax materials, powdered metals or plastics and the like on the basis of a digital model file, the three-dimensional printer is used for manufacturing a product at the present stage, and the object is constructed by a layer-by-layer printing mode, the principle of the 3D printer is that data and raw materials are put into the 3D printer, and the machine can manufacture the product layer by layer according to a program.

Present 3D printer is printing the completion back, and some remaining raw materialss can be attached to on the print head surface, need artificial clearance to beat printer head, have reduced the efficiency of clearance, moreover, present 3D printer does not have protective equipment, and some noxious material that release are directly discharged into the air, are absorbed by the human body easily, give other people's life safety and cause the threat, have reduced the security of 3D printer.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the 3D printer with the nozzle cleaning and purifying functions is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: A3D printer with nozzle cleaning and purifying functions comprises a main body, a material box and a base, wherein the main body is fixed on the base, the material box is fixed above the main body, a PLC is arranged in the base, a printing mechanism, a cleaning mechanism and a purifying mechanism are arranged in the main body, and the cleaning mechanism and the purifying mechanism are respectively arranged on two sides in the main body;

the purification mechanism comprises a purification chamber, a swinging assembly and a reciprocating assembly, wherein the purification chamber is fixed on the inner wall of one side of the main body, a plurality of through holes are formed in one side of the purification chamber close to the main body, a preset filter screen, an active carbon filter screen and an HEPA filter screen are sequentially arranged in the purification chamber, and the swinging assembly and the reciprocating assembly are both arranged on one side of the purification chamber far away from the main body;

the device comprises a main body, a swinging assembly, a cleaning room, a reciprocating assembly and a cleaning room, wherein the main body is provided with a main body, the main body is provided with;

the cleaning mechanism comprises a moving assembly, a supporting plate, a rotating assembly and a cleaning assembly, the supporting plate is arranged on one side, away from the main body, of the moving assembly, the rotating assembly is arranged on the supporting plate and comprises a first motor and a turntable, the first motor is fixed on the supporting plate and is connected with the turntable in a transmission mode, the cleaning assembly is arranged above the turntable, and the first motor is electrically connected with the PLC.

Preferably, in order to provide power for the swinging of the suction nozzle, the reciprocating assembly comprises a second motor, a driving gear, a moving frame and two racks, the second motor is fixed on the purifying chamber and is in transmission connection with the driving gear, the driving gear is arranged between the two racks, the driving gear is meshed with the racks, the two racks are respectively fixed on two sides in the moving frame, the moving frame is fixedly connected with the connecting rod, and the second motor is electrically connected with the PLC.

Preferably, in order to make the rack move smoothly, lubricating oil is coated between the driving gear and the rack.

Preferably, in order to facilitate cleaning of the printing head, the moving assembly includes a driving unit, a telescopic frame, a moving plate, a hinge block and a moving block, the driving unit is disposed on an inner wall of one side of the main body, the hinge block is fixed on the moving plate, a sliding groove is formed in the moving plate, the moving block is disposed in the sliding groove, the moving block is slidably connected with the moving plate, one end of the telescopic frame is connected with the driving unit, two sides of the other end of the telescopic frame are respectively hinged to the hinge block and the moving block, and the support plate is fixed on the moving plate.

Preferably, in order to provide power for the expansion and contraction of the expansion bracket, the driving unit comprises an air pump, an air cylinder and a piston, the air pump and the air cylinder are fixed on the inner wall of one side of the main body, the air pump is communicated with the air cylinder, the top end of the piston is arranged in the air cylinder, two sides of one end, far away from the moving plate, of the expansion bracket are hinged to the other end of the piston and the air cylinder respectively, and the air pump is electrically connected with the PLC.

As preferred, for the convenience of cleaning printer head, the clearance subassembly includes third motor and two clearance units, the third motor is fixed in the top of carousel, and two clearance units set up about the third motor symmetry, the clearance unit includes lead screw, slider, dead lever and clearance piece, the third motor is connected with the lead screw transmission, the slider cover is established on the lead screw, the slider with the junction of lead screw be equipped with the screw thread that matches with the lead screw, dead lever and clearance piece fixed connection are passed through on the top of slider, the bottom of slider is supported and is leaned on the carousel, the third motor is connected with the PLC electricity.

Preferably, in order to provide supporting force for the screw rod, the cleaning assembly further comprises two bearing seats, the bearing seats are fixed above the rotary table and correspond to the cleaning units one by one, and one end, far away from the third motor, of the screw rod is arranged in the bearing seats.

As preferred, in order to make things convenient for the lift of beating printer head, print mechanism includes the lifter, beats printer head, inlet pipe and two lifting unit, and two lifting unit set up the both sides in the main part respectively, lifting unit includes fourth motor, wire reel and acts as go-between, the fourth motor is fixed on the inner wall of one side of main part, the fourth motor is connected with the wire reel transmission, the one end winding of acting as go-between is on the wire reel, the other end and the top fixed connection of lifter of acting as go-between, the bottom of lifter with beat printer head fixed connection, it passes through inlet pipe and workbin intercommunication to beat printer head, the fourth motor is connected with the PLC electricity.

Preferably, in order to limit the moving direction of the lifting rod, the printing mechanism further comprises a limiting ring, the limiting ring is fixed on the inner wall of one side of the main body, and the limiting ring is sleeved on the lifting rod.

Preferably, in order to improve the intelligent degree of the equipment, a control panel is arranged on the base, a display screen and a plurality of control keys are arranged on the control panel, and the display screen and the control keys are electrically connected with the PLC.

The 3D printer with the nozzle cleaning and purifying functions has the advantages that the function of automatically cleaning the printing head can be realized through the cleaning mechanism, the work load of people is reduced, compared with the existing cleaning mechanism, the cleaning mechanism improves the cleaning efficiency, toxic substances released by the printer can be purified through the purifying mechanism, the influence on the health of the body due to the absorption of the toxic substances by the human body is avoided, compared with the existing purifying mechanism, the purifying mechanism is good in purifying effect, and the safety of the 3D printer is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of a 3D printer with nozzle cleaning and purging functions of the present invention;

FIG. 2 is a schematic structural diagram of a purging mechanism of a 3D printer with nozzle cleaning and purging functions according to the present invention;

FIG. 3 is a schematic structural diagram of a shuttle assembly of the 3D printer with nozzle cleaning and purging functions of the present invention;

FIG. 4 is a schematic structural diagram of a cleaning mechanism of the 3D printer with nozzle cleaning and purging functions of the present invention;

in the figure: 1. the cleaning device comprises a main body, a base, a cleaning chamber, a preset filter screen, an active carbon filter screen, a HEPA filter screen, a suction nozzle, a swinging rod, a sleeve, a hose, a connecting rod, a second motor, a driving gear, a rack, a movable frame, a gas pump, a cylinder, a piston, a telescopic frame, a movable plate, a supporting plate, a first motor, a rotating disc, a third motor, a screw rod, a sliding block, a fixed rod, a cleaning block, a bearing seat, a fourth motor, a winding disc, a pull wire, a lifting rod, a printing head, a limiting ring and a control panel, wherein the preset filter screen is arranged at 4, the active carbon filter screen is arranged at 5, the HEPA filter screen is arranged at 6, the suction nozzle is arranged at 7, the swinging rod is arranged at 8, the sleeve is arranged.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, a 3D printer with nozzle cleaning and purifying functions comprises a main body 1, a material box 36 and a base 2, wherein the main body 1 is fixed on the base 2, the material box 36 is fixed above the main body 1, a PLC is arranged in the base 2, a printing mechanism, a cleaning mechanism and a purifying mechanism are arranged in the main body 1, and the cleaning mechanism and the purifying mechanism are respectively arranged on two sides in the main body 1;

this 3D printer with nozzle clearance and purification performance passes through clearance mechanism, can realize the automatic function that the clearance beaten printer head 34, has reduced people's work burden, compares with current clearance mechanism, and this clearance mechanism has improved the efficiency of clearance, through purifying mechanism, can purify the noxious material that the printer released, avoids being absorbed by the human body and influences healthily, compares with current purification mechanism, should purify mechanism purifying effect good, has improved the security of 3D printer.

The purification mechanism comprises a purification chamber 3, a swinging assembly and a reciprocating assembly, wherein the purification chamber 3 is fixed on the inner wall of one side of the main body 1, a plurality of through holes are formed in one side, close to the main body 1, of the purification chamber 3, a preset filter screen 4, an active carbon filter screen 5 and a HEPA filter screen 6 are sequentially arranged in the purification chamber 3, and the swinging assembly and the reciprocating assembly are arranged on one side, far away from the main body 1, of the purification chamber 3;

the device comprises a main body 1, a swinging assembly, a cleaning chamber 3, a main body 9, a cleaning chamber, a cleaning rod 8, a suction nozzle 7, a hose 10, a reciprocating assembly and a control unit, wherein the swinging assembly comprises a connecting rod 11 and two swinging units, two ends of the connecting rod 11 are respectively connected with the two swinging units, each swinging unit comprises a supporting shaft, a swinging rod 8, a suction nozzle 7, a hose 10 and a sleeve 9, one end of the supporting shaft is fixed on one side of the cleaning chamber 3, which is far away from the main body 1, the other end of the supporting shaft is hinged with one end of the swinging rod 8, the other end of the swinging rod 8 is fixedly connected with the suction nozzle 7, the suction nozzle 7 is communicated with the cleaning chamber 3 through;

through the reciprocal subassembly work of PLC control, make connecting rod 11 remove, drive the swing arm 8 swing through sleeve pipe 9, thereby make the suction nozzle 7 swing, the absorption scope of suction nozzle 7 has been enlarged, absorb the air in main part 1 in clean room 3, through presetting great particulate matter in the filter screen 4 absorption air, through the peculiar smell in the active carbon filter screen 5 absorption air, absorb toxic gas through HEPA filter screen 6, outside air rethread through-hole discharge main part 1 after purifying, the efficiency and the purifying effect of purification have been improved.

Clearance mechanism is including removing subassembly, backup pad 21, runner assembly and clearance subassembly, backup pad 21 sets up the one side of keeping away from main part 1 at removing the subassembly, the runner assembly sets up in backup pad 21, the runner assembly includes first motor 22 and carousel 23, first motor 22 is fixed in backup pad 21, first motor 22 is connected with the transmission of carousel 23, the clearance subassembly sets up the top at carousel 23, first motor 22 is connected with the PLC electricity.

The PLC controls the moving assembly to work, so that the cleaning assembly is located below the printing head 34, the first motor 22 is controlled to be started, the turntable 23 rotates, the cleaning assembly cleans the printing head 34, and the function of automatically cleaning the printing head 34 is achieved.

Preferably, in order to provide power for the swinging of the suction nozzle 7, the reciprocating assembly comprises a second motor 12, a driving gear 13, a moving frame 15 and two racks 14, the second motor 12 is fixed on the purification chamber 3, the second motor 12 is in transmission connection with the driving gear 13, the driving gear 13 is arranged between the two racks 14, the driving gear 13 is meshed with the racks 14, the two racks 14 are respectively fixed on two sides in the moving frame 15, the moving frame 15 is fixedly connected with the connecting rod 11, and the second motor 12 is electrically connected with the PLC. The PLC controls the second motor 12 to start, the driving gear 13 rotates, the rack 14 moves, and the moving frame 15 is driven to move up and down, so that the connecting rod 11 is driven to move up and down in a reciprocating mode, the suction nozzle 7 is driven to swing in a reciprocating mode, the absorption range of the suction nozzle 7 is expanded, and the purification effect is improved.

Preferably, in order to make the rack gear 14 move smoothly, lubricating oil is applied between the driving gear 13 and the rack gear 14. The lubricating oil can reduce the friction between the driving gear 13 and the rack 14, so that the rack 14 moves more smoothly.

Preferably, in order to facilitate cleaning of the printing head 34, the moving assembly includes a driving unit, an expansion bracket 19, a moving plate 20, a hinge block and a moving block, the driving unit is disposed on an inner wall of one side of the main body 1, the hinge block is fixed on the moving plate 20, a sliding groove is disposed on the moving plate 20, the moving block is disposed in the sliding groove, the moving block is slidably connected with the moving plate 20, one end of the expansion bracket 19 is connected with the driving unit, two sides of the other end of the expansion bracket 19 are respectively hinged to the hinge block and the moving block, and the support plate 21 is fixed on the moving plate 20.

Preferably, in order to provide power for the expansion and contraction of the expansion bracket 19, the driving unit comprises an air pump 16, an air cylinder 17 and a piston 18, the air pump 16 and the air cylinder 17 are both fixed on the inner wall of one side of the main body 1, the air pump 16 is communicated with the air cylinder 17, the top end of the piston 18 is arranged in the air cylinder 17, two sides of one end, far away from the moving plate 20, of the expansion bracket 19 are respectively hinged with the other end of the piston 18 and the air cylinder 17, and the air pump 16 is electrically connected with the PLC.

When the printing head 34 needs to be cleaned, the PLC controls the air pump 16 to work, the pressure in the air cylinder 17 is changed, the piston 18 is contracted, the expansion bracket 19 is extended, the moving plate 20 drives the cleaning assembly to move to the position below the printing head 34, and the cleaning assembly performs cleaning work on the printing head 34.

Preferably, in order to facilitate cleaning of the printing head 34, the cleaning assembly includes a third motor 24 and two cleaning units, the third motor 24 is fixed above the turntable 23, the two cleaning units are symmetrically arranged with respect to the third motor 24, the cleaning units include a screw rod 25, a slider 26, a fixing rod 27 and a cleaning block 28, the third motor 24 is in transmission connection with the screw rod 25, the slider 26 is sleeved on the screw rod 25, a connection part of the slider 26 and the screw rod 25 is provided with a thread matched with the screw rod 25, the top end of the slider 26 is fixedly connected with the cleaning block 28 through the fixing rod 27, the bottom end of the slider 26 abuts against the turntable 23, and the third motor 24 is electrically connected with the PLC.

When the clearance subassembly is located the below of beating printer head 34, work through PLC control third motor 24, lead screw 25 rotates, make slider 26 remove to the direction that is close to third motor 24, drive clearance piece 28 through dead lever 27 and remove to the direction that is close to beat printer head 34, make clearance piece 28 hug closely beat printer head 34, the work of the rotary assembly of the re-control, make clearance piece 28 carry out the clearance work to beat printer head 34 when the pivoted, avoid remaining raw materials to attach to beat printer head 34 on, influence next work, the function of automatic clearance has been realized, people's work burden has been reduced.

Preferably, in order to provide a supporting force for the screw rod 25, the cleaning assembly further comprises two bearing seats 29, the bearing seats 29 are fixed above the rotating disc 23, the bearing seats 29 correspond to the cleaning units one by one, and one end of the screw rod 25, which is far away from the third motor 24, is arranged in the bearing seats 29. By arranging the bearing seat 29, under the condition that the rotation of the screw rod 25 is not influenced, the supporting force is provided for the screw rod 25, so that the screw rod 25 is more stable in rotation.

Preferably, in order to facilitate the lifting of the printing head 34, the printing mechanism includes a lifting rod 33, a printing head 34, a feeding pipe and two lifting assemblies, the two lifting assemblies are respectively disposed at two sides of the main body 1, the lifting assemblies include a fourth motor 30, a wire spool 31 and a pull wire 32, the fourth motor 30 is fixed on the inner wall of one side of the main body 1, the fourth motor 30 is in transmission connection with the wire spool 31, one end of the pull wire 32 is wound on the wire spool 31, the other end of the pull wire 32 is fixedly connected with the top end of the lifting rod 33, the bottom end of the lifting rod 33 is fixedly connected with the printing head 34, the printing head 34 is communicated with the bin 36 through the feeding pipe, and the fourth motor 30 is electrically connected with the PLC.

When the printer works, the PLC controls the fourth motor 30 to work, the wire spool 31 rotates, the pull wire 32 is lengthened, the lifting rod 33 drives the printing head 34 to descend, the printing head 34 starts to work, and the printing function is achieved.

Preferably, in order to limit the moving direction of the lifting rod 33, the printing mechanism further comprises a limiting ring 35, the limiting ring 35 is fixed on the inner wall of one side of the main body 1, and the limiting ring 35 is sleeved on the lifting rod 33. By arranging the limiting ring 35, the moving direction of the lifting rod 33 is fixed, so that the printing head 34 is more stable when descending.

Preferably, in order to improve the intelligent degree of the equipment, the base 2 is provided with a control panel 37, the control panel 37 is provided with a display screen and a plurality of control keys, and the display screen and the control keys are electrically connected with the PLC. The working state of the printer is displayed through the display screen, the printer can be controlled to work through the control key, and the intelligent length of the printer is improved.

Through the reciprocal subassembly work of PLC control, make connecting rod 11 remove, drive the swing arm 8 swing through sleeve pipe 9, thereby make the suction nozzle 7 swing, the absorption scope of suction nozzle 7 has been enlarged, absorb the air in main part 1 in clean room 3, through presetting great particulate matter in the filter screen 4 absorption air, through the peculiar smell in the active carbon filter screen 5 absorption air, absorb toxic gas through HEPA filter screen 6, outside air rethread through-hole discharge main part 1 after purifying, the efficiency and the purifying effect of purification have been improved. When the printing head 34 is cleaned, the PLC is used for controlling the moving assembly to work, so that the cleaning assembly is located below the printing head 34, the first motor 22 is controlled to be started, the turntable 23 rotates, the cleaning assembly rotates, the printing head 34 is cleaned by the cleaning assembly, and the function of automatically cleaning the printing head 34 is achieved.

Compared with the prior art, this 3D printer with nozzle clearance and purification performance passes through clearance mechanism, can realize the automatic function that the printer head 34 was beaten in the clearance, people's work burden has been reduced, compare with current clearance mechanism, this clearance mechanism has improved the efficiency of clearance, through purifying mechanism, can purify the toxic substance that the printer released, avoid being influenced by human absorption healthy, compare with current purification mechanism, should purify mechanism purifying effect good, the security that has improved the 3D printer.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A3D printer with nozzle cleaning and purifying functions comprises a main body (1), a material box (36) and a base (2), wherein the main body (1) is fixed on the base (2), the material box (36) is fixed above the main body (1), and a PLC is arranged in the base (2), and the 3D printer is characterized in that a printing mechanism, a cleaning mechanism and a purifying mechanism are arranged in the main body (1), and the cleaning mechanism and the purifying mechanism are respectively arranged on two sides in the main body (1);

the purification mechanism comprises a purification chamber (3), a swinging assembly and a reciprocating assembly, wherein the purification chamber (3) is fixed on the inner wall of one side of the main body (1), one side of the purification chamber (3) close to the main body (1) is provided with a plurality of through holes, a preset filter screen (4), an active carbon filter screen (5) and a HEPA filter screen (6) are sequentially arranged in the purification chamber (3), and the swinging assembly and the reciprocating assembly are both arranged on one side of the purification chamber (3) far away from the main body (1);

the swing assembly comprises a connecting rod (11) and two swing units, two ends of the connecting rod (11) are connected with the two swing units respectively, each swing unit comprises a supporting shaft, a swing rod (8), a suction nozzle (7), a hose (10) and a sleeve (9), one end of the supporting shaft is fixed on one side, far away from the main body (1), of the purification chamber (3), the other end of the supporting shaft is hinged to one end of the swing rod (8), the other end of the swing rod (8) is fixedly connected with the suction nozzle (7), the suction nozzle (7) is communicated with the purification chamber (3) through the hose (10), the sleeve (9) is sleeved on the swing rod (8), two ends of the connecting rod (11) are hinged to the two sleeves (9) respectively, and the reciprocating assembly is arranged between the connecting rod (11) and the purification chamber (3);

clearance mechanism is including removing subassembly, backup pad (21), runner assembly and clearance subassembly, backup pad (21) set up the one side of keeping away from main part (1) at removing the subassembly, the runner assembly sets up in backup pad (21), the runner assembly includes first motor (22) and carousel (23), first motor (22) are fixed in backup pad (21), first motor (22) are connected with carousel (23) transmission, the setting of clearance subassembly is in the top of carousel (23), first motor (22) are connected with the PLC electricity.

2. The 3D printer with the nozzle cleaning and purifying functions as claimed in claim 1, wherein the reciprocating assembly comprises a second motor (12), a driving gear (13), a moving frame (15) and two racks (14), the second motor (12) is fixed on the purifying chamber (3), the second motor (12) is in transmission connection with the driving gear (13), the driving gear (13) is arranged between the two racks (14), the driving gear (13) is meshed with the racks (14), the two racks (14) are respectively fixed on two sides in the moving frame (15), the moving frame (15) is fixedly connected with the connecting rod (11), and the second motor (12) is electrically connected with the PLC.

3. 3D printer with nozzle cleaning and purging function as claimed in claim 2 characterized in that lubricating oil is applied between the driving gear (13) and the rack (14).

4. The 3D printer with the nozzle cleaning and purifying functions as claimed in claim 1, wherein the moving assembly comprises a driving unit, an expansion bracket (19), a moving plate (20), a hinged block and a moving block, the driving unit is arranged on the inner wall of one side of the main body (1), the hinged block is fixed on the moving plate (20), a sliding groove is formed in the moving plate (20), the moving block is arranged in the sliding groove, the moving block is slidably connected with the moving plate (20), one end of the expansion bracket (19) is connected with the driving unit, two sides of the other end of the expansion bracket (19) are respectively hinged with the hinged block and the moving block, and the support plate (21) is fixed on the moving plate (20).

5. The 3D printer with the nozzle cleaning and purifying functions as claimed in claim 4, wherein the driving unit comprises an air pump (16), an air cylinder (17) and a piston (18), the air pump (16) and the air cylinder (17) are both fixed on the inner wall of one side of the main body (1), the air pump (16) is communicated with the air cylinder (17), the top end of the piston (18) is arranged in the air cylinder (17), two sides of one end, far away from the moving plate (20), of the telescopic frame (19) are respectively hinged with the other end of the piston (18) and the air cylinder (17), and the air pump (16) is electrically connected with the PLC.

6. The 3D printer with nozzle cleaning and purging functions as recited in claim 1, the cleaning assembly comprises a third motor (24) and two cleaning units, the third motor (24) is fixed above the turntable (23), the two cleaning units are symmetrically arranged relative to the third motor (24), the cleaning unit comprises a screw rod (25), a sliding block (26), a fixing rod (27) and a cleaning block (28), the third motor (24) is in transmission connection with the screw rod (25), the sliding block (26) is sleeved on the screw rod (25), the connecting part of the sliding block (26) and the screw rod (25) is provided with a thread matched with the screw rod (25), the top end of the sliding block (26) is fixedly connected with a cleaning block (28) through a fixing rod (27), the bottom end of the sliding block (26) is abutted against the rotary table (23), and the third motor (24) is electrically connected with the PLC.

7. The 3D printer with the nozzle cleaning and purifying functions as claimed in claim 6, wherein the cleaning assembly further comprises two bearing seats (29), the bearing seats (29) are fixed above the turntable (23), the bearing seats (29) correspond to the cleaning units one by one, and one end of the screw rod (25) far away from the third motor (24) is arranged in the bearing seat (29).

8. The 3D printer with nozzle cleaning and purging functions as recited in claim 1, the printing mechanism comprises a lifting rod (33), a printing head (34), a feeding pipe and two lifting components which are respectively arranged at two sides in the main body (1), the lifting component comprises a fourth motor (30), a wire spool (31) and a pull wire (32), the fourth motor (30) is fixed on the inner wall of one side of the main body (1), the fourth motor (30) is in transmission connection with the wire spool (31), one end of the pull wire (32) is wound on the wire spool (31), the other end of the pull wire (32) is fixedly connected with the top end of the lifting rod (33), the bottom and the printer head (34) fixed connection of lifter (33), printer head (34) are through inlet pipe and workbin (36) intercommunication, fourth motor (30) are connected with the PLC electricity.

9. The 3D printer with the nozzle cleaning and purifying functions as claimed in claim 8, wherein the printing mechanism further comprises a limiting ring (35), the limiting ring (35) is fixed on the inner wall of one side of the main body (1), and the limiting ring (35) is sleeved on the lifting rod (33).

10. The 3D printer with the nozzle cleaning and purifying functions as claimed in claim 1, wherein a control panel (37) is arranged on the base (2), a display screen and a plurality of control keys are arranged on the control panel (37), and the display screen and the control keys are electrically connected with the PLC.