CN114347478A - Cleaning device and method for multi-material 3D printing - Google Patents
Cleaning device and method for multi-material 3D printing Download PDFInfo
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- CN114347478A CN114347478A CN202210066521.1A CN202210066521A CN114347478A CN 114347478 A CN114347478 A CN 114347478A CN 202210066521 A CN202210066521 A CN 202210066521A CN 114347478 A CN114347478 A CN 114347478A
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- 238000004140 cleaning Methods 0.000 title claims abstract description 155
- 239000000463 material Substances 0.000 title claims abstract description 112
- 238000010146 3D printing Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000007639 printing Methods 0.000 claims abstract description 100
- 230000007246 mechanism Effects 0.000 claims abstract description 66
- 238000007605 air drying Methods 0.000 claims abstract description 44
- 230000008569 process Effects 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims description 38
- 238000007790 scraping Methods 0.000 claims description 35
- 238000003892 spreading Methods 0.000 claims description 35
- 230000007480 spreading Effects 0.000 claims description 35
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 abstract description 10
- 238000001035 drying Methods 0.000 abstract description 3
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- 238000012986 modification Methods 0.000 description 2
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Abstract
The invention provides a cleaning device and a method for multi-material 3D printing, wherein the device comprises: the printing system comprises a base, a printing platform unit and a cleaning and air-drying unit; the cleaning and air-drying unit comprises a cleaning box unit, a cleaning box rotary switching mechanism, an air outlet plate and an air outlet plate rotary driving mechanism; the cleaning box rotating switching mechanism is connected with the cleaning box unit and is used for rotating the cleaning box unit to be right below the printing platform; the air outlet plate rotation driving mechanism is connected with the air outlet plate and used for driving the air outlet plate to horizontally rotate. Adopt rotatory switching mode to realize drying the control of device to the washing, print platform rigidity is motionless at whole 3D printing and washing air-dry in-process to help improving print platform's printing precision. In addition, the cleaning and air-drying device integrates two functions of cleaning and air-drying, has various functions, and can be used for air-drying after cleaning the printed piece, so that the printed materials can not be polluted mutually in the execution process of the printing task, and the quality of the printed products can be ensured.
Description
Technical Field
The invention belongs to the technical field of 3D printing, and particularly relates to a cleaning device and method for multi-material 3D printing.
Background
The 3D printing mode at the present stage mainly comprises the following steps: after the 3D printing of the part is finished, the part is immersed in the cleaning box, the part is cleaned, and the printing residual material on the surface of the part is removed. The cleaning box designed by the mode is a conventional cleaning box, the cleaning frequency is low in single work, and the cleaning target mostly takes resin as the main component without particle deposition.
Above washing box, the function is single to, for 3D printing apparatus, be an independent washing box, can't be applicable to the switching between the different materials of multiple material 3D printing in-process and print the clearance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a cleaning device and a cleaning method for multi-material 3D printing, which can effectively solve the problems.
The technical scheme adopted by the invention is as follows:
the invention provides a cleaning device for multi-material 3D printing, which comprises: the printing equipment comprises a base (100), a printing platform unit (200) and a cleaning and air-drying unit (600);
the printing platform unit (200) is fixedly arranged above the base (100); the printing platform unit (200) comprises a platform lifting mechanism (201) and a printing platform (202); the platform lifting mechanism (201) is a ball screw lifting mechanism;
the cleaning and air-drying unit (600) comprises a cleaning box unit, a cleaning box rotary switching mechanism, an air outlet plate (606) and an air outlet plate rotary driving mechanism; the cleaning box rotary switching mechanism is connected with the cleaning box unit and is used for rotating the cleaning box unit to be right below the printing platform (202); the air outlet plate rotation driving mechanism is connected with the air outlet plate (606) and is used for driving the air outlet plate (606) to horizontally rotate; the air outlet plate (606) is positioned above the cleaning box unit.
Preferably, the platform lifting mechanism (201) is a ball screw lifting mechanism, comprising: the device comprises a lifting motor (2011), a screw rod (2012), a slider (2013), an upper limit switch (2014) and a lower limit switch (2015);
the screw rod (2012) is vertically arranged; the sliding block (2013) is sleeved on the screw rod (2012); the printing platform (202) which is horizontally arranged is fixedly arranged outside the sliding block (2013); the lifting motor (2011) is used for driving the screw rod (2012) to rotate; the upper limit switch (2014) and the lower limit switch (2015) are respectively installed at the upper limit position and the lower limit position where the sliding block (2013) slides.
Preferably, also comprises n cartridges (505);
n cartridges (505) and one cleaning cartridge unit are annularly arranged; the material box (505) and the cleaning box unit are connected with the cleaning box rotary switching mechanism.
Preferably, a spreading scraping piece (404) is uniquely and correspondingly arranged above each material box (505); the spreading material scraping piece (404) and the air outlet plate (606) are connected to the air outlet plate rotation driving mechanism.
The invention also provides a method for the multi-material 3D printing cleaning device, which comprises the following steps:
step 1, in the multi-material 3D printing process, after the bottom surface of a printing platform is bonded to finish one-time printing material curing molding, a cleaning box rotating switching mechanism controls a cleaning box unit to rotate to be right below the printing platform (202);
step 2, the platform lifting mechanism (201) controls the printing platform (202) to descend, so that the solidified molded part bonded on the bottom surface of the printing platform is immersed in the cleaning liquid in the cleaning box unit, and the solidified molded part is subjected to ultrasonic cleaning;
step 3, after the cleaning is finished, the platform lifting mechanism (201) controls the printing platform (202) to ascend by a certain height, so that the solidified and molded part on the bottom surface of the printing platform (202) is positioned above the air outlet plate (606);
and 4, driving the air outlet plate (606) to swing below the curing and forming part by the air outlet plate rotation driving mechanism, and directly blowing the air outlet of the air outlet plate (606) to the curing and forming part to realize the air drying function of the curing and forming part at the bottom of the printing platform (202).
The cleaning device and the cleaning method for the multi-material 3D printing provided by the invention have the following advantages:
adopt rotatory switching mode to realize drying the control of device to the washing, print platform rigidity is motionless at whole 3D printing and washing air-dry in-process to help improving print platform's printing precision. In addition, the cleaning and air-drying device integrates two functions of cleaning and air-drying, has various functions, and can be used for air-drying after cleaning the printed piece, so that the printed materials can not be polluted mutually in the execution process of the printing task, and the quality of the printed products can be ensured.
Drawings
Fig. 1 is an overall schematic diagram of a cleaning device for multi-material 3D printing provided by the invention;
FIG. 2 is a block diagram of a cleaning unit provided by the present invention;
FIG. 3 is a block diagram of a vacuole generator provided by the present invention;
fig. 4 is a structural diagram of the air outlet plate provided by the invention.
Fig. 5 is an overall view of a 3D printing apparatus provided by the present invention;
fig. 6 is a schematic view of an internal structure of the multi-material 3D printing apparatus provided by the present invention after a base is hidden;
FIG. 7 is a structural view of a rotary switching mechanism of the cleaning box provided by the invention at an angle;
FIG. 8 is a structural view of a rotary switching mechanism of the cleaning cartridge provided by the present invention at another angle;
FIG. 9 is a structural diagram of a feeding, spreading and scraping integrated unit provided by the present invention;
FIG. 10 is a diagram of the position relationship between the spreading scraper and the material box;
FIG. 11 is a block diagram of a paver scraper provided in accordance with the present invention;
fig. 12 is a block diagram of a doctor blade holder provided by the invention;
fig. 13 is a structural view of a doctor blade provided by the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a cleaning device for multi-material 3D printing, which integrates a 3D printing platform and a cleaning and air-drying device, wherein the cleaning and air-drying device adopts a rotary switching mode, and when the printing platform needs cleaning and air-drying, the cleaning and air-drying device is rotated to be right below the printing platform; when the cleaning and air-drying are finished, the cleaning and air-drying device is rotated to other positions, so that the printing platform performs a printing process. Because the control to the washing air-dry device is realized to adoption rotation switching mode, at whole 3D printing and washing air-dry in-process, print platform rigidity to help improving print platform's printing precision. In addition, the cleaning and air-drying device integrates two functions of cleaning and air-drying, has various functions, and can be used for air-drying after cleaning the printed piece, so that the printed materials can not be polluted mutually in the execution process of the printing task, and the quality of the printed products can be ensured.
Referring to fig. 1, the invention provides a cleaning device for multi-material 3D printing, comprising: a base 100, a printing platform unit 200 and a cleaning and air-drying unit 600;
a printing platform unit 200 is fixedly arranged above the base 100; the printing platform unit 200 comprises a platform lifting mechanism 201 and a printing platform 202; the platform lifting mechanism 201 is a ball screw lifting mechanism;
the cleaning and air-drying unit 600 comprises a cleaning box unit, a cleaning box rotary switching mechanism, an air outlet plate 606 and an air outlet plate rotary driving mechanism; the cleaning box rotating switching mechanism is connected with the cleaning box unit and is used for rotating the cleaning box unit to be right below the printing platform 202; the air outlet plate rotation driving mechanism is connected with the air outlet plate 606 and is used for driving the air outlet plate 606 to horizontally rotate; the air outlet plate 606 is located above the cleaning box unit.
The structural components are described in detail below:
the screw rod 2012 is vertically arranged; a slider 2013 is sleeved on the screw rod 2012; a horizontally arranged printing platform 202 is fixedly arranged outside the slider 2013; the lifting motor 2011 is used for driving the screw rod 2012 to rotate; at the upper limit position and the lower limit position where the slider 2013 slides, an upper limit switch 2014 and a lower limit switch 2015 are respectively installed, so that the position limit of the printing platform 202 is limited.
(II) cleaning the box unit and the air outlet plate 606
It should be emphasized that the cleaning box unit and the air outlet plate 606 provided in this embodiment are only one specific embodiment, and in practical applications, other structural forms of cleaning box unit and air outlet plate may also be adopted, and the present invention is not limited to this:
specifically, whether the cleaning of the printing residues is complete or not in the 3D printing process of photocuring various materials directly influences the quality of printed products. Especially, during the light-cured molding additive manufacturing, the printing raw materials are mostly in a liquid or paste state. In order to realize multi-gradient printing of various materials, different printing materials are required to be ensured not to be polluted mutually in the process of executing a printing task. The printing surface of each printed material is free from other residue, so that printing of different materials can be realized at each layer and even at a single pixel level. The traditional cleaning mode has physical damage or incomplete cleaning to a certain degree on the surface quality of a printed product.
Therefore, the invention designs a self-leveling ultrasonic cleaning box for multi-material 3D printing, which is a cleaning box for multi-material 3D printing, and adopts the modes of ultrasonic cleaning, a vacuole generator and an air outlet plate to ensure that printing materials cannot be polluted mutually in the process of executing a printing task, thereby ensuring the quality of printed products.
(2.1) cleaning Cartridge Unit
Referring to fig. 2 and 3, the self-leveling ultrasonic cleaning box for multi-material 3D printing comprises a cleaning box 601, an ultrasonic generator 602, a bubble generator 603, a self-leveling liquid outlet 604 and a self-leveling liquid return port 605;
the bottom of the cleaning box 601 is provided with an ultrasonic generator 602; a self-leveling liquid outlet 604 and a self-leveling liquid return port 605 are respectively arranged at two sides of the cleaning box 601; a bubble generator 603 is mounted between the self-leveling liquid outlet 604 and the self-leveling liquid return 605.
The principle is as follows:
the cleaning box 601 is made of 3D printing non-metal materials, so that a complex mechanism can be realized, and vibration transmission is reduced.
The self-leveling liquid outlet 604 and the self-leveling liquid return port 605 are respectively connected with a peristaltic pump to realize the circulation of the cleaning liquid. The circulation mode is as follows: the cleaning liquid is located in the liquid container, enters the cleaning box through the self-leveling liquid return port 605 through the peristaltic pump, is pumped out from the self-leveling liquid outlet 604 through the peristaltic pump and is filtered, and finally the filtered cleaning liquid is returned into the liquid container. Since the self-leveling liquid outlet 604 and the self-leveling liquid return port 605 are designed to be self-leveling, the cleaning liquid can stably flow in and flow out.
The bottom of the cleaning box 601 is provided with an ultrasonic generator 602 which can generate cavitation effect for cleaning the surface of the printing piece.
The ultrasonic power is not suitable to be too high because the power of the ultrasonic generator 602 can damage the structure of the printed part. Therefore, the power of the ultrasonic generator 602 cannot make the particle deposition uniformly distributed on the liquid surface, and therefore, the particles in the solution cannot be discharged from the cleaning box 601 through the self-leveling liquid outlet 604. In order to effectively discharge and filter residual material particles in the cleaning box 601 along with the self-leveling liquid outlet 604 and ensure the cleanness of the cleaning liquid in the cleaning box 601, the invention particularly designs the liquid bubble generator 603.
Referring to fig. 3, the bubble generator 603 includes a bubble generator body 6031, the bubble generator body 6031 is a cavity structure, and a plurality of vent holes 6032 communicated with the cavity structure are formed on a surface of the bubble generator body 6031; an air inlet 6033 communicated with the cavity structure is formed in the back surface of the liquid bubble generator body 6031; the air inlet 6033 is connected with an air source.
By connecting the gas circuit, gas is enabled to generate larger bubbles along the circular holes on the surface of the bubble generator 603, so that deposited particles in the liquid in the cleaning box are uniformly distributed on the surface of the liquid and enter the self-leveling liquid outlet 604 along with the circulation of the liquid for filtering, thereby ensuring that the cleaning liquid in the cleaning box keeps a good cleaning effect and can work for a long time without replacing the cleaning liquid.
In addition, in the present invention, a plurality of circular holes are designed around the cleaning box as overflow slots 607, which can store the overflow liquid and prevent the cleaning liquid from splashing to other places of the equipment. The cleaning box is also provided with an overflow hole 608, the overflow hole 608 is slightly higher than the surface of the overflow groove 607 and lower than the upper surface of the outer wall of the cleaning box, when too much cleaning liquid is caused by some abnormal reason in the cleaning box, the liquid can enter the overflow hole 608 to trigger the overflow sensor 609, thereby suspending the cleaning system and avoiding the damage or pollution of the printing equipment caused by too much overflow or outflow.
(2.2) air outlet plate 606
In the present invention, an air outlet plate 606 is disposed above the cleaning box 601 as an air drying unit, and referring to fig. 4, the air drying unit includes the air outlet plate 606; the air outlet plate 606 adopts a porous integrated type surface air outlet structure, the air outlet plate 606 is horizontally arranged above the cleaning unit, one end of the air outlet plate 606 is an air inlet 606A, and the air inlet 606A is connected with an air source through an air channel electromagnetic valve; the upper surface of the air-out plate 606 is provided with a plurality of air outlets 606B.
The air outlet plate 606 directly blows to the bottom of the printing platform through the air outlet 606B, and in the air outlet process, through swinging, the air drying function of the printing surface at the bottom of the printing platform is achieved.
The air outlet plate is designed into a porous integrated type face air outlet structure, so that the problem of physical damage to a printed piece caused by air outlet of a traditional air nozzle is greatly reduced; in addition, the multi-hole type inheritance surface air outlet device has the advantages that the air outlet air drying area is large, and the air drying efficiency and the air drying effect are effectively improved.
(III) rotating switching mechanism of cleaning box
Also included are n cartridges 505; n material boxes 505 and a cleaning box unit are arranged along the ring shape; the magazine 505 and the cleaning magazine unit are connected to the cleaning magazine rotation switching mechanism.
That is, for a multi-material 3D printing apparatus, the cartridge 505 and the purge cartridge unit share the same set of rotary switching mechanism, thereby reducing the complexity of the structure.
The specific structural form of the rotary switching mechanism of the cleaning box is not limited in the invention as long as the rotary switching mechanism can realize the rotary switching, and only one specific embodiment in practical application is described as follows:
in order to ensure the printing precision, realize the stability and levelness of the rotation switching of the material box and the cleaning box and prevent the uneven thickness of the printing material in the material box during the rotation switching, the invention provides the rotation switching mechanism of the cleaning box with the fine design.
Referring to fig. 7 and 8, the wash cassette rotary switching mechanism 500 includes a rotary disk 501, a rotary bearing 502, a rotary motor 503, and a connection bracket 504;
the rotary disc 501 is horizontally arranged, a connecting bracket 504 is fixedly arranged coaxially below the rotary disc 501, a rotating motor 503 is fixedly arranged coaxially below the connecting bracket 504, and the rotary disc 501 is driven to rotate horizontally by the rotating motor 503;
the bottom of the rotary disk 501 is coaxially provided with a rotary bearing 502; wherein, the slewing bearing 502 adopts an inner and outer ring slewing bearing, and the outer ring bearing is fixed with the surface of the base 100; the inner ring bearing is fixed with the bottom surface of the rotary disk 501, and the rotary disk 501 rotates stably under the supporting action of the rotary bearing 502;
The wash tank rotary switch mechanism 500 has the following features:
(1) the cleaning box rotary switching mechanism 500 has the main body of an axisymmetric structure and adopts a slewing bearing for assistance, so that the precision of rotary switching between the material box and the cleaning box is ensured.
(2) The surface of the disk 501 is rotated, and the material box 505 and the cleaning and air-drying unit 600 are integrated at the same time, so that the material box 505 and the cleaning and air-drying unit 600 are switched. That is to say, the magazine 505 and the cleaning and air-drying unit 600 share the same set of rotation switching mechanism, and there is no need to design a special rotation switching mechanism for the cleaning and air-drying unit, so that the complexity of the device structure is simplified, and the device integration level is high.
(IV) air outlet plate rotary driving mechanism
A spreading scraping piece 404 is uniquely and correspondingly arranged above each material box 505; the spreading scraping piece 404 and the air outlet plate 606 are both connected to an air outlet plate rotation driving mechanism.
That is, for a multi-material 3D printing device, the spreading scraper 404 and the air outlet plate 606 share the same set of rotary driving mechanism, thereby reducing the complexity of the structure.
The specific structural form of the air outlet plate rotation driving mechanism is not limited in the invention, as long as rotation switching can be realized, and only one specific embodiment in practical application is described as follows:
referring to fig. 7 and 8, the outlet plate rotation driving mechanism 400 includes: an air outlet plate rotating disc 401, an air outlet plate rotating bearing 402 and an air outlet plate motor 403.
Wherein, the setting quantity of the paving material scraping pieces 404, the setting quantity of the feeding units 405 and the setting quantity of the material boxes 505 are the same, one paving material scraping piece 404, one feeding unit 405 and one material box 505 are in one-to-one correspondence, in the multi-material 3D printing process, the feeding units 405 feed the corresponding paving material scraping pieces 404, and the paving material scraping pieces 404 reciprocate in the material boxes 505 to realize paving and scraping of the material boxes 505.
N spreading and scraping pieces 404 extend outwards from the periphery of the air outlet plate rotating disc 401 and are fixedly installed; each spreading scraper 404 is positioned above a corresponding one of the magazines 505; each group of feeding units 405 corresponds to one spreading scraping piece 404 and is used for independently feeding the spreading scraping pieces 404;
the air outlet plate rotating disc 401 is positioned above the rotary disc 501, and a scraping rotary bearing 402 is coaxially arranged between the air outlet plate rotating disc 401 and the rotary disc 501; the air outlet plate rotating bearing 402 adopts an inner ring and outer ring rotating bearing, the outer ring bearing is fixed with the rotating disc 501, and the inner ring bearing is fixed with the air outlet plate rotating disc 401 and the feeding unit 405; the air outlet plate rotating disc 401 can rotate stably under the supporting action of the air outlet plate rotating bearing 402, and the air outlet plate rotating disc 401, the paving scraping piece 404 and the feeding unit 405 can move synchronously during scraping, so that the relative positions of the paving scraping piece 404 and the corresponding feeding unit 405 are ensured to be unchanged;
an air outlet plate motor 403 is fixedly arranged below the air outlet plate rotating disc 401 coaxially, and the air outlet plate rotating disc 401 is driven to rotate through the air outlet plate motor 403;
when the air outlet plate rotating disc 401 rotates, the spreading scraping piece 404 and the feeding unit 405 are driven to synchronously rotate to realize scraping; the air outlet plate motor 403 is fixed on the connecting bracket 504, and when the material box rotates, the air outlet plate motor 403, the air outlet plate rotating disk 401, the paving material scraping part 404 and the feeding unit 405 are driven to integrally move synchronously.
The air outlet plate rotation driving mechanism 400 provided by the invention also has the following innovative design:
(4.1) Angle restriction piece 406 and contact switch 407
In the invention, an output shaft of an air outlet plate motor 403 is sleeved with an angle limiting sheet 406, and the angle limiting sheet 406 is of a fan-shaped structure; a contact switch 407 is fixedly mounted on a rotation path of the angle limiting piece 406; the rotation angle of the air outlet plate motor 403 in the forward and reverse directions is controlled by the engagement of the angle restricting piece 406 and the contact switch 407.
Specifically, the angle limiting piece 406 has a fan-shaped structure, and two end points of the fan-shaped structure are P1 and P2. When the P1 contacts the contact switch 407, the spreading scraper 404 is located at the left C1 position of the magazine 505; then, the air outlet plate motor 403 rotates and drives the spreading scraping piece 404 and the angle limiting piece 406 to synchronously rotate, and at the moment, when the angle limiting piece 406 rotates, the sector arc line of the angle limiting piece is continuously contacted with the contact switch 407; the spreading scraper 404 rotates from the left C1 position to the right C2 position of the magazine 505;
when the P2 of the angle limiting piece 406 contacts the contact switch 407, the spreading scraper 404 rotates to the right C2 position of the magazine 505; then, the air-out plate motor 403 is triggered to rotate reversely, so that the spreading scraping piece 404 rotates from the position of the right side C2 of the material box 505 to the position of the left side C1, meanwhile, the angle limiting piece 406 rotates, the end point of P1 is continuously close to the contact switch 407, and when the end point of P1 contacts the contact switch 407, the spreading scraping piece 404 just rotates to the position of the left side C1 of the material box 505. The above-mentioned steps are repeated continuously, so that the reciprocating swing motion of the spreading scraping piece 404 in the material box 505 is realized.
(4.2) feed Unit 405
Each set of supply units 405 is used to supply one corresponding magazine 505.
Referring to fig. 9, each set of feed unit 405 includes a cartridge 405A, a feed delivery pipe 405B, and a solenoid valve 405C.
The cartridge 405A contains a printing material, corresponds to a cartridge 505, and is powered by air pressure provided by an external air compressor, and is controlled by an electromagnetic valve 405C to feed each cartridge 405A separately, and the printing material is conveyed into a scraper rack 4041 in the cartridge 505 through a conveying pipe 405B.
(4.3) spreading scraper 404
Referring to fig. 9-13, the windrow wiper 404 includes: a blade holder 4041, a left blade 4042, and a right blade 4043;
the blade holder 4041 includes a blade cavity 4041A and a blade arm 4041B fixedly integrated with the inside of the blade cavity 4041A;
the scraper arm 4041B is used for fixing with the periphery of the air outlet plate rotating disk 401; in the present invention, as shown in fig. 10, the scraper arm 4041B is formed by three orthogonal planes, and is matched with the mounting groove of the rotating disk 401 of the air-out plate, and the scraper arm 4041B is placed into the mounting groove and locked and fixed. Therefore, the fixed end of the scraper arm 4041B is composed of three orthogonal planes, and is matched with the mounting groove composed of the three orthogonal planes, so that high repeated positioning precision can be realized, the three orthogonal planes are fixed by a single release screw, six-degree-of-freedom complete locking can be realized, and high stability can be realized no matter the material scraping integrated scraper is rotated or linearly and repeatedly scraped. And the thickness precision of the printing layer cannot be influenced due to the cantilever structure formed by fixing the single side.
The scraper cavity 4041A is located inside one material box 505, the scraper cavity 4041A is provided with a through hollow structure cavity, and the length and radian of the scraper cavity 4041A are matched with the inner cavity of the material box 505 and used for reciprocating rotation along the inner cavity of the material box 505 to realize efficient scraping. In addition, scraper cavity 4041A adopts the design of optimizing open type inclined plane, and the material can be carried out in real time to the printing material dependence natural gravity of being convenient for in 3D printing process and supply.
The left and right sides of the scraper cavity 4041A are respectively provided with a left scraper 4042 and a right scraper 4043 with adjustable heights; the left blade 4042 and the right blade 4043 are one print layer thick from the bottom surface of the blade cavity 4041A. Wherein, the side wall of both sides scraper and scraper cavity 4041A, the finish machining leans on the face cooperation, and the design has long waist hole on the scraper, can realize high accuracy fine setting and fix locking through two screws with the clearance gauge to realize scraping the bed thickness difference.
The spreading and scraping piece provided by the invention has the following advantages:
1) the material spreading and scraping piece is provided with double scrapers and a scraper cavity for accommodating printing materials, integrates a material supplying and spreading integrated scraper, integrates traditional material supplying and spreading into material spreading and material supplying at the same time, and improves the efficiency of material spreading and material supplying;
2) the height of the scraper is adjustable, so that scraping materials with different layer thicknesses is realized, and various use requirements are met.
3) The spreading material scraping part and the air outlet plate rotating disc are installed in a matched mode through three orthogonal plane structures, and high stability of the spreading material integral scraper in rotating material scraping or linear reciprocating material scraping is guaranteed.
Therefore, the material spreading and scraping piece is an integrated scraper for spreading materials, the work flow of material feeding and material spreading in the traditional 3D printing process can be simplified into the process of feeding and material spreading at the same time, and the structure is simpler.
Orthogonal plane cooperation is leaned on the design of face, makes the integrated scraper of confession stone material dismantles the installation and realize high repeated positioning accuracy to each layer thickness uniformity in the assurance 3D printing process finally directly guarantees 3D and prints finished product precision and structural performance.
The invention can effectively solve the problems of efficiency and printing precision commonly existing in the 3D printing industry at the present stage. The integrated scraper for spreading materials adopts a single loose screw fixation, can realize high stability and high precision, and is convenient for cleaning the scraper and the material box after the photocuring 3D printing is finished.
(v) ultraviolet optical unit 300:
in practical application, the ultraviolet optical unit 300 is also included. Referring to fig. 5, an ultraviolet optical unit 300 is fixedly installed below a base 100; the printing surface of the printing platform 202 and the light emitting direction of the ultraviolet optical unit 300 are coaxially arranged in an up-down opposite manner.
Specifically, the ultraviolet optical unit 300 adopts a high-precision ultraviolet DLP optical system, and is fixed under the printing platform 202, and the material box located between the ultraviolet optical unit 300 and the printing platform 202 is a material box of the printing station, so that the printing platform 202, the ultraviolet optical unit 300 and the material box of the printing station are arranged in a straight line in the longitudinal direction.
The ultraviolet optical unit 300 projects and solidifies the printing material in the material box from bottom to top through the optical glass at the bottom of the material box, so that the single layer thickness printing material is solidified to the bottom printing surface of the printing platform 202 according to the set shape.
The invention also provides a method for the multi-material 3D printing cleaning device, which comprises the following steps:
step 1, in the multi-material 3D printing process, after the bottom surface of a printing platform is bonded to finish one-time printing material curing molding, a cleaning box rotating switching mechanism controls a cleaning box unit to rotate to be right below the printing platform 202;
step 2, the platform lifting mechanism 201 controls the printing platform 202 to descend, so that the solidified molded part bonded on the bottom surface of the printing platform is immersed in the cleaning liquid in the cleaning box unit, and the solidified molded part is subjected to ultrasonic cleaning;
step 3, after the cleaning is finished, the platform lifting mechanism 201 controls the printing platform 202 to ascend by a certain height, so that the solidified and molded part on the bottom surface of the printing platform 202 is positioned above the air outlet plate 606;
and 4, driving the air outlet plate 606 to swing below the curing and forming part by the air outlet plate rotation driving mechanism, and directly blowing the air outlet of the air outlet plate 606 to the curing and forming part to realize the air drying function of the curing and forming part at the bottom of the printing platform 202.
The cleaning device and the cleaning method for the multi-material 3D printing provided by the invention have the following advantages:
adopt rotatory switching mode to realize drying the control of device to the washing, print platform rigidity is motionless at whole 3D printing and washing air-dry in-process to help improving print platform's printing precision. In addition, the cleaning and air-drying device integrates two functions of cleaning and air-drying, has various functions, and can be used for air-drying after cleaning the printed piece, so that the printed materials can not be polluted mutually in the execution process of the printing task, and the quality of the printed products can be ensured.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.
Claims (5)
1. A cleaning device for multi-material 3D printing is characterized by comprising: the printing equipment comprises a base (100), a printing platform unit (200) and a cleaning and air-drying unit (600);
the printing platform unit (200) is fixedly arranged above the base (100); the printing platform unit (200) comprises a platform lifting mechanism (201) and a printing platform (202); the platform lifting mechanism (201) is a ball screw lifting mechanism;
the cleaning and air-drying unit (600) comprises a cleaning box unit, a cleaning box rotary switching mechanism, an air outlet plate (606) and an air outlet plate rotary driving mechanism; the cleaning box rotary switching mechanism is connected with the cleaning box unit and is used for rotating the cleaning box unit to be right below the printing platform (202); the air outlet plate rotation driving mechanism is connected with the air outlet plate (606) and is used for driving the air outlet plate (606) to horizontally rotate; the air outlet plate (606) is positioned above the cleaning box unit.
2. The cleaning device for multi-material 3D printing according to claim 1, wherein the platform lifting mechanism (201) is a ball screw lifting mechanism comprising: the device comprises a lifting motor (2011), a screw rod (2012), a slider (2013), an upper limit switch (2014) and a lower limit switch (2015);
the screw rod (2012) is vertically arranged; the sliding block (2013) is sleeved on the screw rod (2012); the printing platform (202) which is horizontally arranged is fixedly arranged outside the sliding block (2013); the lifting motor (2011) is used for driving the screw rod (2012) to rotate; the upper limit switch (2014) and the lower limit switch (2015) are respectively installed at the upper limit position and the lower limit position where the sliding block (2013) slides.
3. The cleaning device for multi-material 3D printing according to claim 1, further comprising n cartridges (505);
n cartridges (505) and one cleaning cartridge unit are annularly arranged; the material box (505) and the cleaning box unit are connected with the cleaning box rotary switching mechanism.
4. The cleaning device for multi-material 3D printing according to claim 1, characterized in that a spreading scraper (404) is arranged above each magazine (505) in unique correspondence; the spreading material scraping piece (404) and the air outlet plate (606) are connected to the air outlet plate rotation driving mechanism.
5. A method for a multi-material 3D printing cleaning device according to any one of claims 1-4, characterized by the steps of:
step 1, in the multi-material 3D printing process, after the bottom surface of a printing platform is bonded to finish one-time printing material curing molding, a cleaning box rotating switching mechanism controls a cleaning box unit to rotate to be right below the printing platform (202);
step 2, the platform lifting mechanism (201) controls the printing platform (202) to descend, so that the solidified molded part bonded on the bottom surface of the printing platform is immersed in the cleaning liquid in the cleaning box unit, and the solidified molded part is subjected to ultrasonic cleaning;
step 3, after the cleaning is finished, the platform lifting mechanism (201) controls the printing platform (202) to ascend by a certain height, so that the solidified and molded part on the bottom surface of the printing platform (202) is positioned above the air outlet plate (606);
and 4, driving the air outlet plate (606) to swing below the curing and forming part by the air outlet plate rotation driving mechanism, and directly blowing the air outlet of the air outlet plate (606) to the curing and forming part to realize the air drying function of the curing and forming part at the bottom of the printing platform (202).
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| CN202210066521.1A CN114347478B (en) | 2022-01-20 | 2022-01-20 | Cleaning device and method for multi-material 3D printing |
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| CN202210066521.1A CN114347478B (en) | 2022-01-20 | 2022-01-20 | Cleaning device and method for multi-material 3D printing |
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Cited By (1)
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| CN115157670A (en) * | 2022-06-21 | 2022-10-11 | 江苏乾度智造高科技有限公司 | Feeding system for industrial 3D printing |
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