CN111873126A - Electromagnetic type bidirectional switching scraper device applied to 3D printer - Google Patents

Electromagnetic type bidirectional switching scraper device applied to 3D printer Download PDF

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Publication number
CN111873126A
CN111873126A CN202010775509.9A CN202010775509A CN111873126A CN 111873126 A CN111873126 A CN 111873126A CN 202010775509 A CN202010775509 A CN 202010775509A CN 111873126 A CN111873126 A CN 111873126A
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CN
China
Prior art keywords
scraper
printer
sliding plate
frame
horizontal moving
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Granted
Application number
CN202010775509.9A
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Chinese (zh)
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CN111873126B (en
Inventor
黄石伟
陈�光
顾荣军
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Jiangsu Qiandu Zhizao Hi Tech Co Ltd
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Jiangsu Qiandu Zhizao Hi Tech Co Ltd
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Priority to CN202010775509.9A priority Critical patent/CN111873126B/en
Publication of CN111873126A publication Critical patent/CN111873126A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00Producing shaped prefabricated articles from the material
    • B28B1/001Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/205Means for applying layers
    • B29C64/214Doctor blades
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00Apparatus for additive manufacturing; Details thereof or accessories therefor
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64Burning or sintering processes
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/66Specific sintering techniques, e.g. centrifugal sintering
    • C04B2235/665Local sintering, e.g. laser sintering

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

The invention provides an electromagnetic bidirectional switching scraper device applied to a 3D printer, which comprises: a horizontally moving sliding plate, a scraper frame and a height limiting seat; both sides of the scraper frame are provided with scrapers and limiting guide rods; scrape the board frame and be connected with the horizontal migration slide through the revolving axle, when scraping the board frame and reacing limit for height seat position department, spacing guide bar contacts and the downstream with the tapered face at limit for height seat top for the scraper blade frame swings on the horizontal migration slide, thereby switches the scraper of scraping the board frame both sides. The automatic double-cutter switching device has the advantages that the automatic double-cutter switching is realized when the scraper moves left and right, the automatic feeding problem of a 3D printer is solved, the electromagnet device is matched with the height limiting seat for use, the cutter changing process is quicker while the precision of the scraper is ensured, the cutter changing mode is stable and reliable, the 3D printer can realize unmanned and automatic operation feeding through the scraper device, the problem of unstable manual smearing precision is avoided, and the problems of working precision, efficiency and reliability are solved.

Description

Electromagnetic type bidirectional switching scraper device applied to 3D printer
Technical Field
The invention belongs to the technical field of 3D printing, and particularly relates to an electromagnetic type bidirectional switching scraper device applied to a 3D printer.
Background
A scraper device is often used in a full-automatic SLA laser 3D printer, and the principle of the scraper device is that a printed object is divided into a plurality of layers, and one layer of raw material is added when one layer is solidified. The scraper device is to evenly coat raw materials on a workbench, the scraper device generally adopts a single blade type, the single blade efficiency is not high, and the ideal effect cannot be achieved. The person skilled in the art therefore proposes a squeegee device of double-blade construction. But the great ceramic thick liquids of viscosity can't be better handled to present double knives structure scraper means, can't accomplish automatic feeding promptly, and material loading and tool changing all need the staff to assist moreover, consequently often appears because the human factor leads to the printing precision to reach the condition of requirement. In addition, the prior scraper device with a double-cutter structure has a complex structure, so that the cutter changing mode is slow, unstable and low in reliability.
Disclosure of Invention
In order to solve the technical problem, the invention provides an electromagnetic bidirectional switching scraper device applied to a 3D printer.
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
The invention adopts the following technical scheme:
in some optional embodiments, there is provided an electromagnetic bidirectional switching doctor apparatus applied to a 3D printer, including: the device comprises a horizontal moving sliding plate, a scraper frame and a height limiting seat positioned at a left-right moving terminal of the horizontal moving sliding plate; both sides of the scraper frame are provided with scrapers and limiting guide rods, and the top of the height limiting seat is provided with an inclined wedge surface; the scraper frame is connected with the horizontal moving sliding plate through a rotating shaft, when the scraper frame drives the scraper to reach the position of the height limiting seat, the limiting guide rod is in contact with the inclined wedge surface at the top of the height limiting seat and moves downwards, so that the scraper frame swings on the horizontal moving sliding plate, and the scrapers on two sides of the scraper frame are switched.
In some optional embodiments, positioning electromagnets are further arranged on two sides of the scraper rack, iron blocks are arranged on two sides of the horizontal moving sliding plate, when the scraper rack swings in place on the horizontal moving sliding plate, the positioning electromagnet on the front side is electrified to attract the corresponding iron block, and the positioning electromagnet on the other side is powered off, so that the scraper rack after swinging is fixed.
In some optional embodiments, the gap between the scraper which is put into use and the printing table surface of the printer in two scrapers is 0.1-0.3 mm.
In some optional embodiments, the electromagnetic bidirectional switching doctor device applied to the 3D printer further includes: a work table and a machine body; the fuselage includes: the machine body comprises a machine body main body and a reference flat plate, wherein the reference flat plate is arranged at the top of the machine body main body, a square groove is formed in the middle of the reference flat plate, and the workbench is lifted in the square groove through a lifting device.
In some optional embodiments, the body further comprises: installing a flat plate and a shockproof foot cup; the main body of the machine body is formed by welding square pipes, the shockproof foot cup is arranged at the bottom of the main body of the machine body, and the installation flat plate is arranged on the main body of the machine body.
In some optional embodiments, the horizontal moving sliding plate is arranged on the reference flat plate through a sliding rail.
The invention has the following beneficial effects: the automatic double-cutter feeding mechanism has the advantages that the double-cutter structure is adopted, automatic double-cutter switching is realized when the automatic double-cutter feeding mechanism moves left and right, the automatic feeding problem of a 3D printer is solved, the electromagnet device is matched with the height limiting seat for use, the precision of a scraper is guaranteed, the cutter changing process is quicker, the cutter changing mode is stable and reliable, the 3D printer can realize unmanned and automatic operation feeding through the scraper device, the problem of unstable precision of manual smearing is avoided, and the problems of working precision, efficiency and reliability are solved.
Drawings
FIG. 1 is a perspective view of an electromagnetic, bi-directional switching doctor apparatus of the present invention;
FIG. 2 is a top plan view of the electromagnetic bi-directional switching doctor apparatus of the present invention;
FIG. 3 is a sectional view taken along line B-B of FIG. 2;
FIG. 4 is a schematic structural diagram of the electromagnetic bi-directional switching doctor apparatus of the present invention;
FIG. 5 is a sectional view taken along line A-A of FIG. 4;
FIG. 6 is a schematic view of the position of the electromagnetic bi-directional switching doctor device and reference plate of the present invention;
FIG. 7 is a schematic view of the position of the electromagnetic bi-directional switching doctor device of the present invention in a 3D printer;
FIG. 8 is a schematic structural view of the fuselage of the present invention;
fig. 9 is a schematic structural diagram of the lifting device of the present invention.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others.
As shown in fig. 1 to 9, in some illustrative embodiments, the present invention provides an electromagnetic bidirectional switching doctor device applied to a 3D printer, including: the horizontal moving sliding plate 303 drives the scraper 304 to reciprocate above the printing table of the printer, so as to scrape off the slurry supplied by the feeding system 200. The horizontal movement sliding plate 303 is mounted on the reference flat plate 502 through the sliding rail 302 to realize translation in a printing work area, the horizontal movement sliding plate 303 is connected with the motor 301 through a synchronous belt, and the motor 301 drives the scraper device 300 to move along the sliding rail 302.
The invention also includes: a scraper holder 305. The blade holder 305 is connected to the horizontally movable slide 303 via a pivot 306, i.e. the blade holder 305 can swing on the horizontally movable slide 303. The horizontal moving slide plate 303 is connected with the slide rail 302 to realize translation, and the scraper frame 305 realizes rotation around the rotating shaft 306. Both sides of the scraper holder 305 are provided with scrapers 304, and the two scrapers 304 form a certain angle with each other.
Scrape the blade holder 305 left and right sides and all be equipped with scraper 304, when scraper device 300 toward scraping material on one side, one side scraper 304 work, another side scraper 304 improves the constant height and is out of work, when the switching-over, scrape the swing of blade holder 305, another side scraper 304 falls, former work scraper 304 promotes, realizes the tool changing function, switches the scraper 304 of scraping the blade holder both sides promptly.
The invention also includes: a height limiting seat 307 and a limiting guide rod 308. The horizontal moving sliding plate 303 reciprocates left and right, namely the horizontal moving sliding plate 303 reciprocates above the printing table of the printer, the limiting height seats 307 are arranged at the end points of two sides of the moving path, and the purpose of the limiting height seats 307 is that when the horizontal moving sliding plate 303 reaches the position with the scraper frame 305, the limiting height seats 307 apply a thrust to the scraper frame 305, so that the scraper frame 305 swings.
The top of the height-limiting seat 307 is provided with an inclined wedge surface 309, two sides of the scraper frame 305 are also provided with a limiting guide rod 308, and the height of the limiting guide rod 308 is between the highest point and the lowest point of the inclined wedge surface 309. When scraping the blade holder 305 and driving scraper 304 and reach limit for height seat 307 position department, spacing guide bar 308 contacts with the oblique wedge face 309 at limit for height seat top, when scraping blade holder 305 and continuing to remove, because oblique wedge face 309 is the slope, oblique wedge face 309 pushes down spacing guide bar 308 gradually for scrape the blade holder 305 and swing on horizontal migration slide 303, thereby switch scrapers 304 of scraping the blade holder both sides.
For stable and balanced switching scraper, the number of the height limiting seats 307 is four, correspondingly, the number of the limiting guide rods 308 is also four, and the four limiting guide rods 308 are distributed at four corners of the scraper frame 305.
As shown in fig. 5, the two sides of the scraper holder 305 are further provided with positioning electromagnets 310, the two sides of the horizontally moving sliding plate 303 are provided with iron blocks 311 at positions corresponding to the positioning electromagnets 310, and a limit screw 312 is mounted near the positioning electromagnets 310, and the limit screw 312 ensures the positioning accuracy of the swinging of the scraper holder 305. When the scraper holder 305 swings in place on the horizontal sliding plate 303, the positioning electromagnet on the front side is electrified to attract the corresponding iron block, and the positioning electromagnet on the other side is powered off, so as to fix the scraper holder 305 after swinging is completed.
When the scraper holder 305 swings in place, the positioning electromagnet 310 generates magnetism, the scraper holder 305 and the horizontal moving sliding plate 303 are mutually firmly attracted, the working cutter head switching action is completed, when the scraper device 300 moves to the other side for limiting, the original positioning electromagnet 310 is switched off, the scraper holder 305 rotates around the rotating shaft 306 under the matching of the limiting guide rod 308 and the height limiting seat 307, the positioning screw 312 is limited, and the positioning electromagnet 310 on the side is electrified to enable the scraper holder 305 and the horizontal moving sliding plate 303 to be mutually firmly attracted, so that the working cutter head switching is realized. The electromagnetic devices on the two sides act alternately, and the actions are repeated, so that full-automatic tool changing in the 3D printing process is realized. The fixing mode of the scraper frame 305 is more secure and stable through the electromagnet device, and is more reliable, and the misoperation probability is reduced.
After the scraper 304 with the slurry completely penetrates through the printing table surface, through the structure of the invention, the blade realizes pendulum, the scraper on the other side falls down, the scraper on the original side is lifted, and the scraper with the residual material returns to repeat the front action, so that the reciprocating action solves the automatic feeding problem of the 3D printer. The clearance between the scraper and the workbench in use in the two scrapers is 0.1-0.3 mm.
When the electromagnetic bidirectional switching scraper device applied to the 3D printer provided by the invention is applied to the 3D printer, the electromagnetic bidirectional switching scraper device can be used as the scraper device 300. As shown in fig. 7, the 3D printer includes: laser scanning system 100, feed system 200, scraper device 300, workstation 400.
The invention also includes: and a main body 500 for carrying all the systems and mechanisms of the printer.
As shown in fig. 8, the body 500 includes: a main body 501 and a reference plate 502. The reference flat plate 502 is arranged at the top of the main body 501 of the machine body, the reference flat plate 502 is a bearing surface and a reference surface of the main parts of the machine body, and the main body 501 of the machine body is a three-dimensional stable structure formed by welding square pipes.
A square groove 505 is formed in the middle of the reference flat plate 502, and a printing table top of the workbench ascends and descends in the square groove 505 to form a printing core working area. A silo may be provided in the square groove 505 and the feeding system 200 feeds the silo to supply the ceramic slurry to the work table 400.
The body 500 further includes: a horizontal adjustment mechanism 507, a mounting plate 503 and a shock-proof foot cup 506. The vibration prevention cup 506 is provided at the bottom of the body main body 501. The horizontal adjustment mechanism 507 is disposed between the main body 501 and the reference plate 502 to adjust the levelness of the reference plate 502, and an existing horizontal adjustment mechanism is adopted, which is not described herein again. A mounting plate 503 is provided on the body 501 perpendicular to the body 501 for mounting a driving part of the table 400. The body 500 further includes: a transverse mounting plate 504, on which transverse mounting plate 504 a drive or control portion of the printer may be mounted.
The laser scanning system 100, located above the platen 400, is used to generate a laser beam that cures the ceramic slurry to cure the slurry on the printing table top of the platen 400.
The supply system 200 is provided on the main body 501 to supply the slurry to the work table 400.
The worktable 400 is a liftable worktable, and is lifted through a liftable device to realize the Z-direction movement of a workpiece in the printing process.
As shown in fig. 9, the lifting device includes: power motor 404, motor mount 405, bottom plate 406, sleeve 407 and support plate 410. The power motor 404 is installed on the bottom plate 406 through the motor base 405, the bottom plate 406 is arranged at the bottom of the installation flat plate 503, the driving shaft of the power motor 404 is connected with the sleeve 407 through the ball screw transmission mechanism, the supporting plate 410 is arranged at the top of the sleeve 407, and the printing table top 412 of the workbench is arranged on the supporting plate 410. The power motor 404 drives the sleeve 407 to move up and down through the ball screw transmission mechanism, so as to drive the printing table 412 of the workbench to move up and down. The ball screw transmission mechanism is one of the existing transmission mechanisms, the ball screw is a product which converts rotary motion into linear motion or converts linear motion into rotary motion, and the specific structure is not repeated herein. The beneficial effect of the combination is that the workbench can be quickly positioned and fixed, and the workbench can be quickly assembled and disassembled. The lifting workbench is a workpiece placing platform and is a core working area of the whole machine. The lifting positioning precision and the repeated positioning precision directly influence the working precision of the whole machine, the printing platform can be quickly disassembled, and the precision is kept unchanged after the printing platform is installed and recovered.
Liftable device still includes: the sliding plate 403 is connected with the guide rail 401 through the sliding block 402, the sleeve 407 is connected with the sliding plate 403, the guide rail 401 is arranged on the mounting flat plate 503, support is provided for the up-and-down movement of the sleeve, and the structure is stable.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

Claims (6)

1. The utility model provides a be applied to two-way switching scraper device of electromagnetic type of 3D printer which characterized in that includes: the device comprises a horizontal moving sliding plate, a scraper frame and a height limiting seat positioned at a left-right moving terminal of the horizontal moving sliding plate; both sides of the scraper frame are provided with scrapers and limiting guide rods, and the top of the height limiting seat is provided with an inclined wedge surface; the scraper frame is connected with the horizontal moving sliding plate through a rotating shaft, when the scraper frame drives the scraper to reach the position of the height limiting seat, the limiting guide rod is in contact with the inclined wedge surface at the top of the height limiting seat and moves downwards, so that the scraper frame swings on the horizontal moving sliding plate, and the scrapers on two sides of the scraper frame are switched.
2. The electromagnetic type bidirectional switching scraper device applied to the 3D printer according to claim 1 is characterized in that positioning electromagnets are further arranged on two sides of the scraper holder, iron blocks are arranged on two sides of the horizontal moving sliding plate, when the scraper holder swings in place on the horizontal moving sliding plate, the positioning electromagnet on the front side is electrified to attract the corresponding iron block, and the positioning electromagnet on the other side is powered off, so that the scraper holder after swinging is fixed is achieved.
3. The electromagnetic type bidirectional switching scraper device applied to the 3D printer according to claim 2, wherein a gap between a scraper in use and a printing table surface of the printer in the two scrapers is 0.1-0.3 mm.
4. The electromagnetic bidirectional switching doctor apparatus applied to 3D printer according to claim 3, further comprising: a work table and a machine body; the fuselage includes: the machine body comprises a machine body main body and a reference flat plate, wherein the reference flat plate is arranged at the top of the machine body main body, a square groove is formed in the middle of the reference flat plate, and the workbench is lifted in the square groove through a lifting device.
5. The electromagnetic bidirectional switching doctor apparatus applied to 3D printer according to claim 4, wherein the body further comprises: installing a flat plate and a shockproof foot cup; the main body of the machine body is formed by welding square pipes, the shockproof foot cup is arranged at the bottom of the main body of the machine body, and the installation flat plate is arranged on the main body of the machine body.
6. The electromagnetic type bidirectional switching scraper device applied to a 3D printer according to claim 5 is characterized in that the horizontal moving sliding plate is arranged on the reference flat plate through a sliding rail.
CN202010775509.9A 2020-08-05 2020-08-05 Electromagnetic type bidirectional switching scraper device applied to 3D printer Active CN111873126B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115042431A (en) * 2022-06-13 2022-09-13 江苏乾度智造高科技有限公司 Two-way 3D who initiatively switches and detect prints scraper system
CN115319882A (en) * 2022-08-11 2022-11-11 江苏乾度智造高科技有限公司 Cantilever type bidirectional switching 3D printing scraper
CN115338433A (en) * 2022-10-17 2022-11-15 西安赛隆增材技术股份有限公司 Pendulum type scraper device and selective melting and material increase manufacturing equipment for powder bed

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CN104827664A (en) * 2015-01-28 2015-08-12 江汉大学 3D printer
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CN109773940A (en) * 2019-01-20 2019-05-21 武汉因泰莱激光科技有限公司 Large format ceramics rapid molding device and its feeding control method
US20200139625A1 (en) * 2018-11-06 2020-05-07 Prodways Method And Devices For Rapid Detection And Calibration Of A 3D Printer Using A Viscous Material
CN210679742U (en) * 2019-08-14 2020-06-05 陕西工业职业技术学院 Auxiliary leveling scraper mechanism of photocuring forming machine
CN212266130U (en) * 2020-08-05 2021-01-01 江苏乾度智造高科技有限公司 Electromagnetic type bidirectional switching scraper device applied to 3D printer

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Publication number Priority date Publication date Assignee Title
CN106457663A (en) * 2014-04-07 2017-02-22 豪迈股份公司 Device and method for producing three-dimensional objects
CN104827664A (en) * 2015-01-28 2015-08-12 江汉大学 3D printer
US20200139625A1 (en) * 2018-11-06 2020-05-07 Prodways Method And Devices For Rapid Detection And Calibration Of A 3D Printer Using A Viscous Material
CN109773940A (en) * 2019-01-20 2019-05-21 武汉因泰莱激光科技有限公司 Large format ceramics rapid molding device and its feeding control method
CN210679742U (en) * 2019-08-14 2020-06-05 陕西工业职业技术学院 Auxiliary leveling scraper mechanism of photocuring forming machine
CN212266130U (en) * 2020-08-05 2021-01-01 江苏乾度智造高科技有限公司 Electromagnetic type bidirectional switching scraper device applied to 3D printer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115042431A (en) * 2022-06-13 2022-09-13 江苏乾度智造高科技有限公司 Two-way 3D who initiatively switches and detect prints scraper system
CN115042431B (en) * 2022-06-13 2024-06-14 江苏乾度智造高科技有限公司 Two-way 3D printing scraper system of initiative switching and detection
CN115319882A (en) * 2022-08-11 2022-11-11 江苏乾度智造高科技有限公司 Cantilever type bidirectional switching 3D printing scraper
CN115338433A (en) * 2022-10-17 2022-11-15 西安赛隆增材技术股份有限公司 Pendulum type scraper device and selective melting and material increase manufacturing equipment for powder bed

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