CN216683369U

CN216683369U - Rotary driving printing device for multi-material 3D printing

Info

Publication number: CN216683369U
Application number: CN202220153018.5U
Authority: CN
Inventors: 李鑫; 刘兵山; 刘晓冬; 王功; 刘学攀
Original assignee: Technology and Engineering Center for Space Utilization of CAS
Current assignee: Technology and Engineering Center for Space Utilization of CAS
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-06-07
Anticipated expiration: 2032-01-20

Abstract

The utility model provides a rotary drive printing device for multi-material 3D printing, comprising: the printing system comprises a base, a printing platform unit, a feeding, spreading and scraping integrated unit and a rotary switching type material box unit; the rotary switching type material box unit comprises a rotary disk, a rotary bearing, a rotary motor, a connecting support and n material boxes; the feeding, spreading and scraping integrated unit comprises: the material scraping device comprises a material scraping rotating disc, a material scraping rotating bearing, a material scraping motor, a material paving and scraping piece and n groups of feeding units. The main body of the rotary switching type material box unit is of an axisymmetric structure and is assisted by a slewing bearing, so that the precision of rotary switching of the material box is ensured. The scraping driving mechanism of the feeding, spreading and scraping integrated unit has a main body with an axisymmetric structure and adopts a slewing bearing for assistance, so that the scraping precision is ensured. Therefore, the printing precision is comprehensively improved, and the printing device is suitable for the field of 3D printing with different layers or the same layer adopting various printing materials.

Description

Rotary driving printing device for multi-material 3D printing

Technical Field

The utility model belongs to the technical field of 3D printing, and particularly relates to a rotary driving printing device for multi-material 3D printing.

Background

3D printing is a technique for constructing objects by layer-by-layer printing using bondable materials such as powdered metals or plastics based on digital model files.

Traditional 3D printing techniques are single material printing whereby only single material parts can be printed. With the increasing requirements of people on the functions and performances of products, parts made of a single material are difficult to meet the use requirements, and the manufacturing research on multi-material parts becomes a hotspot of the current research.

The multi-material 3D printing mode is a high and new technology for preparing new materials and controllable materials. The principle is that three-dimensional forming is realized by stacking layer by layer, so that the printing gradient of multiple materials is increased, and the combination of different materials is realized.

The existing multi-material 3D printing mainly has the following problems: the precision of multi-material 3D printing equipment is not high, and the industrial use requirement is difficult to meet.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a rotary driving printing device for multi-material 3D printing, which can effectively solve the problems.

The technical scheme adopted by the utility model is as follows:

the utility model provides a rotary drive printing device for multi-material 3D printing, comprising: the printing device comprises a base (100), a printing platform unit (200), a feeding, spreading and scraping integrated unit (400) and a rotary switching type material box unit (500);

the printing platform unit (200) is fixedly arranged above the base (100);

the rotary switching type material box unit (500) comprises a rotary disk (501), a rotary bearing (502), a rotary motor (503), a connecting support (504) and n material boxes (505); the rotary disc (501) is horizontally arranged, the connecting support (504) is coaxially and fixedly arranged below the rotary disc (501), the rotating motor (503) is coaxially and fixedly arranged below the connecting support (504), and the rotary disc (501) is driven to horizontally rotate through the rotating motor (503);

the bottom of the rotary disc (501) is coaxially provided with the rotary bearing (502); the rotary bearing (502) adopts an inner ring rotary bearing and an outer ring rotary 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 disc (501), and the rotary disc (501) can stably rotate under the supporting action of the rotary bearing (502);

n material boxes (505) are fixedly arranged on the surface of the rotary disk (501) along the ring shape; when the rotary disk (501) rotates, the material boxes (505) are driven to synchronously rotate, and when one material box (505) rotates to a printing station, the material box (505) positioned at the printing station and the printing platform unit (200) are vertically positioned on the same vertical line;

the feeding, spreading and scraping integrated unit (400) comprises: the material scraping and scraping device comprises a scraping rotating disc (401), a scraping rotating bearing (402), a scraping motor (403), a paving and scraping part (404) and n groups of feeding units (405);

the periphery of the scraping rotary disc (401) extends outwards to fixedly mount n paving scraping pieces (404); each spreading scraper (404) is positioned above a corresponding one of the cartridges (505); each group of the feeding units (405) corresponds to one paving scraping piece (404) and is used for independently feeding the paving scraping pieces (404);

the scraping rotating disc (401) is positioned above the rotary disc (501), and the scraping rotating bearing (402) is coaxially arranged between the scraping rotating disc (401) and the rotary disc (501); the scraping rotary bearing (402) adopts an inner ring rotary bearing and an outer ring rotary bearing, the outer ring bearing is fixed with the rotary disc (501), and the inner ring bearing is fixed with the scraping rotary disc (401) and the feeding unit (405); the scraping rotary disc (401) is enabled to rotate smoothly during scraping through the supporting effect of the scraping rotary bearing (402), and the scraping rotary disc (401), the paving scraping piece (404) and the feeding unit (405) are enabled to move synchronously during scraping, so that the relative positions of the paving scraping piece (404) and the corresponding feeding unit (405) are guaranteed to be unchanged;

the scraping motor (403) is coaxially and fixedly arranged below the scraping rotating disk (401), and the scraping rotating disk (401) is driven to rotate through the scraping motor (403); when the scraping rotating disc (401) rotates, the paving scraping piece (404) and the feeding unit (405) are driven to synchronously rotate to realize scraping; scrape material motor (403) and be fixed in linking bridge (504) of rotatory switching formula magazine unit (500), work as rotatory switching formula magazine unit (500) carry out rotary motion, drive scrape material motor (403), scrape material rotary disk (401) the windrow scrape material (404) and the whole simultaneous movement that feed unit (405) formed.

Preferably, an angle limiting sheet (406) is sleeved on an output shaft of the scraping motor (403), 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 sheet (406); the forward and reverse rotation angles of the scraping motor (403) are controlled by the matching of the angle limiting sheet (406) and the contact switch (407).

The rotary driving printing device for multi-material 3D printing provided by the utility model has the following advantages:

the main body of the rotary switching type material box unit is of an axisymmetric structure and is assisted by a slewing bearing, so that the precision of rotary switching of the material box is ensured. The scraping driving mechanism of the feeding, spreading and scraping integrated unit has a main body with an axisymmetric structure and adopts a slewing bearing for assistance, so that the scraping precision is ensured. Therefore, the printing precision is comprehensively improved, and the printing device is suitable for the field of 3D printing with different layers or the same layer adopting various printing materials.

Drawings

Fig. 1 is a schematic overall structure diagram of a multi-material 3D printing apparatus provided by the present invention;

fig. 2 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. 3 is a structural diagram of the feeding, spreading and scraping integrated unit and the rotary switching type material box unit provided by the utility model at an angle;

FIG. 4 is a structural diagram of the feeding, spreading and scraping integrated unit and the rotary switching type material box unit provided by the utility model at another angle;

FIG. 5 is a structural diagram of a feeding, spreading and scraping integrated unit provided by the utility model;

FIG. 6 is a diagram showing the position relationship between the spreading scraper and the material box;

FIG. 7 is a block diagram of a paver scraper provided in accordance with the present invention;

fig. 8 is a block diagram of a doctor blade holder according to the utility model;

FIG. 9 is a block diagram of a taping knife provided in accordance with the present invention;

FIG. 10 is a block diagram of a cleaning and seasoning unit and a printing platform provided by the present invention;

FIG. 11 is a block diagram of a cleaning unit provided by the present invention;

FIG. 12 is a block diagram of a vacuole generator provided by the present invention;

fig. 13 is a structural diagram of an air outlet plate provided by the utility model.

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 utility model and are not intended to limit the utility model.

The utility model provides a rotary driving printing device for multi-material 3D printing, which mainly comprises: the printing device comprises a base 100, a printing platform unit 200, a feeding, paving and scraping integrated unit 400 and a rotary switching type material box unit 500. The utility model relates to a printing platform unit 200 which is fixed in position, and realizes that material boxes of different printing materials are switched to a printing station right below the printing platform unit 200 in a rotating way through a rotating switching type material box unit 500, so that multi-material 3D printing is realized.

According to the utility model, through the fine design of the printing platform unit 200, the feeding, spreading and scraping integrated unit 400 and the rotary switching type material box unit 500, the precision of multi-material 3D printing is effectively improved.

The following describes the structural components of the present invention in detail:

printing platform unit 200:

the printing platform unit 200 is fixedly installed above the base 100. During the 3D printing, the position of the printing platform unit 200 is fixed.

Referring to fig. 10, the printing platform unit 200 includes a platform elevating mechanism 201 and a printing platform 202; the printing platform 202 is driven by the platform lifting mechanism 201 to perform lifting movement;

specifically, platform elevating system 201 is ball screw elevating system, includes: the lifting motor 2011, the screw 2012, the slider 2013, the upper limit switch 2014 and the lower limit switch 2015;

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) Rotary switching magazine Unit 500

The rotary switching type material box unit 500 provided by the utility model is a device in which the position of the printing platform 202 is fixed, and material boxes of different printing materials are switched to a printing station right below the printing platform 202 through rotary switching of the material boxes, so that multi-material 3D printing is realized. In order to ensure the printing precision, realize the stability and levelness of the rotation switching of the material box and prevent the uneven thickness of the printing material in the material box during the rotation switching, the utility model provides the rotation switching type material box unit with the fine design. It should be emphasized that the rotation switching type cartridge unit described below is only one specific implementation manner, and in practical applications, other structural forms of the rotation switching type cartridge unit 500 may be adopted as long as the rotation of the cartridge 505 can be realized, and the specific structural form of the rotation switching type cartridge unit is not limited in the present invention.

Referring to fig. 3 and 4, the rotation switching type cartridge unit 500 includes a cartridge switching drive mechanism and n cartridges 505;

the cartridge switching drive mechanism drives n cartridges 505 to rotate integrally.

The magazine switching driving mechanism comprises a rotary disk 501, a rotary bearing 502, a rotating motor 503 and a connecting 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 rotary bearing 502 adopts an inner and outer ring rotary 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;

n material boxes 505 are fixedly arranged on the surface of the rotary disk 501 along the ring shape; for example, 5 cartridges 505 may be installed. When the rotary disk 501 rotates, each material box 505 is driven to rotate synchronously, and when a certain material box 505 rotates to the printing station, the material box 505 and the printing platform 202 which are positioned on the printing station are positioned on the same vertical line from top to bottom.

The rotary switching magazine unit 500 has the following features:

the main body of the rotary switching type material box unit is of an axisymmetric structure and is assisted by a slewing bearing, so that the precision of rotary switching of the material box is ensured.

(III) feeding, spreading and scraping integrated unit 400

The feeding, spreading and scraping integrated unit 400 is used for independently feeding, spreading and scraping each magazine 505 in the rotary switching magazine unit 500.

Referring to fig. 3, 4 and 5, the feeding, spreading and scraping integrated unit 400 includes: a scraping driving mechanism, a spreading scraping part 404 and n groups of feeding units 405.

The scraping driving mechanism is fixedly arranged above the material box switching driving mechanism and used for driving the paving material scraping part 404 and the feeding unit 405 to integrally rotate, so that paving and scraping are realized.

As a specific implementation manner, the scraping driving mechanism includes a scraping rotating disc 401, a scraping rotating bearing 402 and a scraping 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 scraping pieces 404 extend outwards from the periphery of the scraping rotating disc 401 and are fixedly mounted; 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 scraping rotating disc 401 is positioned above the rotary disc 501, and a scraping rotating bearing 402 is coaxially arranged between the scraping rotating disc 401 and the rotary disc 501; the scraping rotary bearing 402 adopts an inner ring rotary bearing and an outer ring rotary bearing, the outer ring bearing is fixed with the rotary disc 501, and the inner ring bearing is fixed with the scraping rotary disc 401 and the feeding unit 405; through the supporting action of the scraping rotary bearing 402, the scraping rotary disc 401 rotates stably during scraping, and the scraping rotary disc 401, the paving scraping piece 404 and the feeding unit 405 move synchronously during scraping, so that the relative positions of the paving scraping piece 404 and the corresponding feeding unit 405 are guaranteed to be unchanged;

a scraping motor 403 is coaxially and fixedly arranged below the scraping rotary disk 401, and the scraping rotary disk 401 is driven to rotate through the scraping motor 403;

when the scraping rotating disc 401 rotates, the paving scraping piece 404 and the feeding unit 405 are driven to synchronously rotate to realize scraping; the scraping motor 403 is fixed to the connecting bracket 504 of the rotation switching type magazine unit 500, and when the rotation switching type magazine unit 500 performs a rotation motion, the scraping motor 403, the scraping rotating disk 401, the paving scraping member 404 and the feeding unit 405 are driven to perform an integral synchronous motion.

The feeding, spreading and scraping integrated unit provided by the utility model drives the scraping rotating disc to rotate in a scraping rotating bearing mode, and has the advantage of stable rotation, so that the scraping precision can be ensured. In addition, the feeding, paving and scraping integrated unit is integrated on the rotary switching type material box unit, when the material box is switched in a rotary mode, the rotation of the scraping motor 403, the paving and scraping piece 404 and the n groups of feeding units 405 can be guaranteed simultaneously, the unique correspondence of the scraping motor 403, the paving and scraping piece 404, the feeding units 405 and the material box 505 is guaranteed, the pollution of printing materials in the material box is avoided, and the printing precision is guaranteed.

In addition to the above structure, the present invention also provides the following partial structural innovations, and it should be emphasized that the following structural content is only one preferred implementation way, and is not used to limit the present invention:

(1) ultraviolet optical unit 300:

referring to fig. 2, an ultraviolet optical unit 300 is fixedly installed below the 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.

(2) Cleaning and air-drying unit 600

Whether the printing residual material is completely cleaned 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 utility model designs a cleaning and air-drying unit which is used 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 a printed product.

Wherein, the washing and drying unit 600 can be integrally installed on the surface of the rotary disk 501, for example, n material boxes 505 and one washing and drying unit 600 are fixedly installed on the surface of the rotary disk 501 along the ring shape; when the rotary disk 501 rotates, each material box 505 and the cleaning and air-drying unit 600 are driven to synchronously rotate, and when one material box 505 rotates to a printing station, 3D printing operation is carried out; when the cleaning and air-drying unit 600 rotates to the printing station, the cleaning and air-drying unit is used for cleaning and air-drying the printing surface of the printing platform 202; rotation of the turntable 501 switches between the respective magazines 505 and the wash and air-dry unit 600.

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.

The washing and air-drying unit 600 includes: a cleaning unit and an air drying unit;

(2.1) cleaning Unit

Referring to fig. 10, 11 and 12, the cleaning unit includes a cleaning cartridge 601, an ultrasonic generator 602, a bubble generator 603, a self-leveling liquid outlet 604 and a self-leveling liquid return 605;

since the cleaning cartridge 601 has the same outer shape as the cartridge 505, switching to the cleaning cartridge 601 is realized in the same manner as switching the rotation of the cartridge 505.

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 utility model particularly designs the liquid bubble generator 603.

Referring to fig. 12, 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 tank 607 and lower than the upper surface of the outer wall of the cleaning box, when the cleaning solution in the cleaning box is too much due to some abnormal reason, the liquid will 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 due to too much overflow or outflow.

(2.2) air drying Unit

Referring to fig. 13, the seasoning unit includes a wind outlet plate 606; referring to fig. 13, the air outlet plate 606 is of a porous integrated surface air outlet structure, the air outlet plate 606 is horizontally disposed 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 path solenoid valve; the upper surface of the air outlet plate 606 is provided with a plurality of air outlets 606B; one end of the air outlet plate 606 is fixed to the periphery of the scraping rotating disk 401, and the air outlet plate 606 swings under the driving of the scraping rotating disk 401.

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, the material scraping rotating disc 401 drives the printing platform to swing, so that 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.

With reference to fig. 10, the operation principle of the cleaning and drying unit 600 is as follows:

the surface of the rotary disk 501 is divided into 6 stations, wherein five stations are material boxes, and one station is a cleaning and air-drying unit 600. One for each printing material.

The rotary disk 501 rotates to rotate the material box corresponding to the currently required printing material to the printing station below the printing platform;

the printing platform is lowered into the material box, and the printing material with a single layer thickness is solidified to the bottommost surface of the printing platform 202 according to a set shape through the matching of the printing platform and the ultraviolet optical unit 300, so that the printing is finished;

the printing platform is lifted and the photoelectric switch is triggered to enter a cleaning link:

the rotary disc 501 rotates to move the cleaning box to a printing station below the printing platform;

and the printing platform is lowered into the cleaning box, and the printing residual materials on the bottom surface of the printing platform are cleaned by the ultrasonic waves and the cleaning liquid in the cleaning box.

After the cleaning is finished, the printing platform is lifted to a certain height to the upper side of the air outlet plate, the material scraping rotating disc 401 drives the air outlet plate 606 to swing, and the air outlet plate 606 reciprocates to dry the printing cleaning surface at the bottom of the printing platform.

In the cleaning process, if the printing platform program is crashed and moved uncontrollably, the printing platform is powered off and suddenly stopped if the printing platform program touches the upper limit and the lower limit.

Therefore, the cleaning and air-drying unit provided by the utility model has the following characteristics:

1) the ultrasonic generator and the liquid bubble generator are matched to generate low-frequency bubbles, so that particles are uniformly distributed on the surface of the liquid, and the particles in the solution are discharged from the cleaning box through the self-leveling structure, so that the cleaning of the cleaning liquid in the cleaning box is ensured, and the cleaning liquid is prevented from being polluted;

2) 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.

The device is reasonable in structural design, high in integration level, convenient to operate and high in practicability. By adopting the ultrasonic cleaning, the vacuole generator and the air outlet plate, the vacuole generator can ensure that cleaning sediments are not precipitated in the ultrasonic cleaning tank when the cleaning liquid is recycled, so that the quality of the cleaning liquid at each time is ensured.

The air outlet of the air drying plate is used for air-drying the cleaning surface, so that no liquid or residual materials exist on the printed piece.

The cleaning device realizes multiple cleaning modes at the same position and integration at different heights, reduces the time of the whole cleaning process and improves the working efficiency when realizing the superposition of the multiple cleaning modes.

(3) For the feeding, spreading and scraping integrated unit 400, the following innovative design is also provided:

(3.1) Angle restricting piece 406 and contact switch 407

In the utility model, an output shaft of a scraping 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 forward and reverse rotation angles of the scraping motor 403 are controlled by the cooperation of the angle limiting 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 scraping 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 scraping 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 the P1 is continuously close to the contact switch 407, and when the end point of the P1 is in contact with 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 steps are repeated continuously, so that the reciprocating swing motion of the paving material scraping piece 404 on the material box 505 is realized.

(3.2) feed Unit 405

Each set of supply units 405 is used to supply one corresponding magazine 505.

Referring to fig. 5, each set of feed units 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.

(3.3) spreading scraper 404

Referring to fig. 6-9, the paver scraper 404 comprises: 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 scraping rotary disk 401; in the present invention, as shown in fig. 7, the scraper arm 4041B is formed by three orthogonal planes, and is fitted into the mounting groove of the scraper rotation disk 401, and the scraper arm 4041B is inserted into the mounting groove and locked and fixed. Therefore, scraper arm 4041B stiff end constitutes for three quadrature plane, with the mounting groove cooperation that constitutes for three quadrature plane, can realize high repeated positioning accuracy, three quadrature plane adds the single screw fixation that takes off of coming loose, can realize six degrees of freedom complete locking, guarantees to supply the stone integral type scraper no matter to be when rotatory scraping material or straight line come and go the scraping material, all can realize high stability. 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, so that efficient scraping is realized. 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 utility model 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 and scraping part and the scraping rotating disc are installed in a matched mode through three orthogonal plane structures, and high stability of the spreading and scraping integrated scraper in rotating scraping or linear reciprocating 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 utility model 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.

The utility model also provides a printing method of the rotary driving printing device for multi-material 3D printing, which comprises the following steps:

step 1, the printing platform unit 200 is fixed;

step 2, the currently needed material box 505 is switched to a printing station right below the printing platform unit 200 in a rotating way through the rotating switching type material box unit 500;

the specific method comprises the following steps:

the rotary motor 503 is controlled, the rotary motor 503 drives the rotary disk 501 to rotate by a set angle through the rotary bearing 502, and when the rotary disk 501 rotates, on one hand, the n material boxes 505 are driven to rotate synchronously, so that the currently required material boxes 505 are switched to a printing station right below the printing platform unit 200; on the other hand, when the rotary disk 501 rotates, the feeding, paving and scraping integrated unit 400 is driven to rotate integrally, so that the relative positions of each material box 505, the unique corresponding paving and scraping piece 404 and the unique corresponding feeding unit 405 are unchanged when the material boxes 505 are switched in rotation;

step 3, performing feeding, spreading and scraping operations on the material box 505 of the current printing station through the feeding, spreading and scraping integrated unit 400, and further spreading the printing material in the material box 505;

and step 4, controlling the printing platform unit 200 to realize 3D printing.

The rotary driving printing device and method for multi-material 3D printing provided by the utility model have the following advantages:

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

1. A rotary drive printing device for multi-material 3D printing, comprising: the printing machine comprises a base (100), a printing platform unit (200), a feeding, paving and scraping integrated unit (400) and a rotary switching type material box unit (500);

the printing platform unit (200) is fixedly arranged above the base (100);

2. The rotary drive printing device for multi-material 3D printing according to claim 1, wherein an output shaft of the scraping motor (403) is sleeved with an angle limiting piece (406), and the angle limiting piece (406) is of a fan-shaped structure; a contact switch (407) is fixedly mounted on a rotation path of the angle limiting sheet (406); the forward and reverse rotation angles of the scraping motor (403) are controlled by the matching of the angle limiting sheet (406) and the contact switch (407).