CN114393829B - Integrated scraper for 3D printing and feeding and integrating method - Google Patents
Integrated scraper for 3D printing and feeding and integrating method Download PDFInfo
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- CN114393829B CN114393829B CN202210066568.8A CN202210066568A CN114393829B CN 114393829 B CN114393829 B CN 114393829B CN 202210066568 A CN202210066568 A CN 202210066568A CN 114393829 B CN114393829 B CN 114393829B
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- 238000010146 3D printing Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 105
- 238000007790 scraping Methods 0.000 claims abstract description 88
- 238000007639 printing Methods 0.000 claims abstract description 52
- 238000003892 spreading Methods 0.000 claims abstract description 23
- 230000007480 spreading Effects 0.000 claims abstract description 22
- 230000010354 integration Effects 0.000 claims abstract description 14
- 238000007605 air drying Methods 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 2
- 238000000016 photochemical curing Methods 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012255 powdered metal Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive 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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/214—Doctor blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE 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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
Abstract
The invention provides a feeding and paving integrated scraper for 3D printing and a feeding and paving integrated method, wherein the feeding and paving integrated scraper for 3D printing comprises the following components: a scraper rest, a left scraper and a right scraper; the left side and the right side of the scraper cavity are respectively provided with a left scraper and a right scraper with adjustable heights; the distance between the left scraper and the right scraper and the bottom surface of the scraper cavity is one printing layer thickness. Has the following advantages: 1) The integrated feeding and spreading integrated scraper is a spreading and scraping piece with double scrapers and scraper cavities for accommodating printing materials, and the traditional feeding and spreading are integrated into spreading and feeding at the same time, so that the spreading and feeding efficiency is improved; 2) The height of the scraper is adjustable, so that scraping materials with different layer thicknesses are realized, and various use requirements are met. 3) Be used for 3D to print and supply material integration scraper and scrape material rotary disk through three orthogonal plane structure cooperation installation, guarantee to supply the high stability of material integration scraper when rotatory scraping or straight line round trip scraping.
Description
Technical Field
The invention belongs to the technical field of 3D printing, and particularly relates to a scraper and a method for feeding and paving of 3D printing.
Background
3D printing is a technology for constructing objects by using a bondable material such as powdered metal or plastic based on digital model files in a layer-by-layer printing manner.
At present, in the photo-curing 3D printing industry, the printing materials most widely used are non-Newtonian fluid materials such as paste, resin and the like. Because of the adhesive nature of the printed material itself, to achieve current high precision additive manufacturing, each layer of exposed cured surface needs to be laid down by doctor blade or other methods. In the prior art, most of scraping layers of scrapers are low in thickness control precision and poor in reliability. And the feeding part mostly adopts side feeding, adopts the scraper to strickle off again, occupation space is great, and scraping efficiency is low.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a scraper for integrating 3D printing and feeding and a feeding and integrating method, which can effectively solve the problems.
The technical scheme adopted by the invention is as follows:
the invention provides an integrated scraper for 3D printing and feeding, comprising: a doctor blade holder (4041), a left doctor blade (4042) and a right doctor blade (4043);
the scraper frame (4041) comprises a scraper cavity (4041A) and a scraper arm (4041B) which is fixedly integrated with the inner side of the scraper cavity (4041A); the scraper arm (4041B) is connected with a scraping driving unit; the scraper cavity (4041A) is positioned in the material box (505), the scraper cavity (4041A) is provided with a penetrating hollow structural cavity, and the length and radian of the scraper cavity (4041A) are matched with those of the inner cavity of the material box (505) and are used for reciprocating rotation along the inner cavity of the material box (505);
the left side and the right side of the scraper cavity (4041A) are respectively provided with the left scraper (4042) and the right scraper (4043) with adjustable heights; the left doctor blade (4042) and the right doctor blade (4043) are spaced from the bottom surface of the doctor blade cavity (4041A) by a thickness of one printing layer.
Preferably, the scraper arm (4041B) is formed by three orthogonal planes, and is matched with a mounting groove of the scraping driving unit, and the scraper arm (4041B) is placed in the mounting groove and locked and fixed.
Preferably, the device further comprises feeding units (405), wherein each feeding unit (405) corresponds to one scraper frame (4041) and is used for independently feeding into a scraper cavity (4041A) of the scraper frame (4041)
Preferably, the feeding unit (405) is connected to the scraping drive unit.
Preferably, the left side and the right side of the scraper cavity (4041A) are respectively provided with a long waist hole, and after the heights of the left scraper (4042) and the right scraper (4043) are adjusted in place, locking screws are adopted to penetrate through the long waist holes for locking and fixing.
The invention also provides a feeding and paving integrated method for the 3D printing and paving integrated scraper, which comprises the following steps of:
step 1, adjusting the heights of a left scraper (4042) and a right scraper (4043), and then placing a scraper cavity (4041A) of a scraper rest (4041) in a material box (505) to enable the bottom ends of the left scraper (4042) and the right scraper (4043) to be separated from the bottom surface of the material box (505) by a printing layer thickness;
step 2, the feeding unit (405), the scraper frame (4041), the left scraper (4042) and the right scraper (4043) are driven to reciprocate in the inner cavity of the material box (505) through the scraper driving unit, and during the movement, on one hand, the feeding unit (405) gradually supplies a set amount of printing material into the scraper cavity (4041A), and the scraper cavity (4041A) is a penetrating hollow structure cavity, so that the set amount of printing material passes through the scraper cavity (4041A) and is paved in the material box (505); on the other hand, the left scraper (4042) and the right scraper (4043) completely and uniformly spread a set amount of printing material inside the material box (505) in the movement process;
the specific method comprises the following steps:
the feeding unit (405), the scraper frame (4041), the left scraper (4042) and the right scraper (4043) are controlled to integrally rotate anticlockwise towards the right side of the material box (505), and in the rotating process, the right scraper (4043) performs primary scraping operation, and the left scraper (4042) performs secondary scraping operation until the right scraper (4043) is completely attached to the right side wall of the material box (505);
then, the feeding unit (405), the scraper frame (4041), the left scraper (4042) and the right scraper (4043) are controlled to integrally and reversely move, namely, the left scraper (4042) rotates clockwise to the left side of the material box (505), in the rotating process, the left scraper (4042) performs primary scraping operation, and the right scraper (4043) performs secondary scraping operation until the left scraper (4042) is completely attached to the left side wall of the material box (505);
thus, the feeding and spreading integration is realized.
The integrated scraper for 3D printing and feeding and the integrated feeding method have the following advantages:
1) The integrated feeding and spreading integrated scraper is a spreading and scraping piece with double scrapers and scraper cavities for accommodating printing materials, and the traditional feeding and spreading are integrated into spreading and feeding at the same time, so that the spreading and feeding efficiency is improved;
2) The height of the scraper is adjustable, so that scraping materials with different layer thicknesses are realized, and various use requirements are met.
3) Be used for 3D to print and supply material integration scraper and scrape material rotary disk through three orthogonal plane structure cooperation installation, guarantee to supply the high stability of material integration scraper when rotatory scraping or straight line round trip scraping.
Drawings
FIG. 1 is a perspective view of an angle of a feeding integrated doctor blade according to the present invention;
FIG. 2 is a perspective view of the integrated taping knife at another angle;
FIG. 3 is a block diagram of a doctor blade provided by the invention;
FIG. 4 is a diagram showing the combination of a feeding and spreading integrated scraper, a magazine and a scraping driving unit according to the present invention;
FIG. 5 is a combination diagram of a feeding integrated doctor blade, a feeding unit and a doctor blade drive unit according to the present invention;
FIG. 6 is a combination diagram of a feed integrated doctor blade, a feed unit, a cartridge, and a doctor blade drive unit provided by the present invention;
fig. 7 is a schematic view of a specific usage mode of the feeding-spreading integrated scraper according to the present invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the 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 for purposes of illustration only and are not intended to limit the scope of the invention.
The present invention provides an integrated scraper for 3D printing and feeding, which is an integrated high-precision scraper for feeding and feeding, and referring to fig. 1 and 2, an integrated scraper 404 for 3D printing and feeding comprises: a blade holder 4041, a left blade 4042, and a right blade 4043;
the scraper frame 4041 comprises a scraper cavity 4041A and a scraper arm 4041B which is fixedly integrated with the inner side of the scraper cavity 4041A; the scraper arm 4041B is connected with a scraping driving unit; the scraper arm 4041B is driven to rotate by the scraping driving unit, so that the feeding and spreading functions are realized. The scraping driving unit can be realized by adopting a motor driving piece.
Referring to fig. 4, a doctor blade cavity 4041A is located in the interior of one of the cartridges 505, the doctor blade cavity 4041A has a through hollow structure cavity, and the length and radian of the doctor blade cavity 4041A are matched with those of the interior of the cartridge 505, so as to realize the function of completely tiling the printing material in the interior of the cartridge 505 by reciprocating along the interior of the cartridge 505. In addition, the scraper cavity 4041A adopts an optimized open type inclined plane design, so that printing materials can be conveniently supplemented in real time by means of natural gravity in the 3D printing process.
The left side and the right side of the scraper cavity 4041A are respectively provided with a left scraper 4042 and a right scraper 4043 with adjustable heights; as shown in fig. 3, which is a schematic view of the doctor blade, the left doctor blade 4042 and the right doctor blade 4043 are spaced apart from the bottom surface of the doctor blade cavity 4041A by one print layer thickness. Wherein, the lateral wall of both sides scraper and scraper cavity 4041A, the finish machining leans on the face cooperation, has long waist hole to design on the scraper, can realize the fine setting of high accuracy and fix the locking through two screws with the clearance gauge to the realization is scraped the material layer thickness and is different.
Therefore, the integrated scraper for 3D printing and feeding provided by the invention is of a double-scraper structure, and the scraper cavity 4041A for feeding is arranged between the double scrapers, so that the scraping is realized by the reciprocating motion of the double scrapers while feeding.
Based on the structure, the invention also has the following innovation:
scraper arm (one)
Referring to fig. 1, the scraper arm 4041B is formed with three orthogonal planes, and is engaged with a mounting groove of the scraper driving unit, and the scraper arm 4041B is placed in the mounting groove and locked and fixed. As shown in fig. 4, 401 is a scraping rotary disk 401 of the scraping driving unit, and an installation groove of the scraping rotary disk 401 is matched with an orthogonal plane of a scraper arm 4041B, so that the scraper arm 4041B is stably driven to rotate when the scraping rotary disk 401 of the scraping driving unit rotates.
Therefore, the three orthogonal planes of the scraper arm 4041B are matched with the mounting grooves of the scraping rotary disk 401 formed by the three orthogonal planes, so that high repeated positioning accuracy can be realized, six degrees of freedom can be completely locked by adding a single loose screw for fixing the three orthogonal planes, and high stability can be realized for the feeding and spreading integrated scraper no matter in rotary scraping or linear reciprocating scraping. And the thickness precision of the printing layer is not affected by the cantilever structure formed by single-side fixation.
(II) feeding unit
The feeding unit is used for independent feeding into the doctor blade cavity 4041A of the doctor blade holder 4041. As a specific implementation, referring to fig. 5, a block diagram of a feed unit 405 is shown.
Specifically, each feeding unit 405 corresponds to one blade holder 4041, and is configured to independently feed into the blade cavity 4041A of the blade holder 4041. In addition, the feeding unit 405 is connected with the scraping driving unit, that is, the feeding unit 405 and the scraper frame 4041 share the same set of scraping driving unit, so that synchronous rotation of the feeding unit 405 and the scraper frame 4041 is realized, and stable feeding of the feeding unit 405 into the scraper cavity 4041A of the only corresponding scraper frame 4041 is ensured.
The feeding unit 405 includes a cartridge 405A, a feed pipe 405B, and a solenoid valve 405C. The cartridges 405A contain a printing material, and correspond to a cartridge 505, and the cartridges 405A are powered by an external air compressor, and are controlled by a solenoid valve 405C to provide individual feeding of each cartridge 405A, and to deliver the printing material to a doctor blade holder 4041 in the cartridge 505 via a delivery tube 405B.
In addition, in the invention, the material conveying pipe 405B is located right above the scraper cavity 4041A and is parallel to the scraper cavity 4041A, and the material conveying pipe 405B is provided with a plurality of discharging holes towards the bottom of the scraper cavity 4041A, so that the material is fed into the scraper cavity 4041A in a linear form, rather than just one discharging hole for feeding in a dot form, thereby ensuring the dispersibility of the printing material during feeding, avoiding the concentration of the printing material at one point in the scraper cavity 4041A, and further improving the tiling precision of the printing material.
(III) height-adjustable doctor blade
The left side and the right side of the scraper cavity 4041A are respectively provided with a long waist hole, and after the heights of the left scraper 4042 and the right scraper 4043 are adjusted in place, locking screws are adopted to penetrate through the long waist holes for locking and fixing.
Fourth scraping driving unit and rotary switching type material box unit
The whole of the blade frame 4041, the left blade 4042, and the right blade 4043 is referred to as an integrated blade 404; the scraping driving unit is used for synchronously driving the feeding unit 405 and the integrated scraper 404 to rotate, so that scraping action is realized.
In a 3D printing scenario, the cartridge also needs to be rotated to the printing station, so the present invention innovatively designs an integrated mechanism of the scraping driving unit and the rotation switching cartridge unit 500. Through scraping the material drive unit, can realize the rotatory stationarity of feed unit 405 and integration scraper 404, further improve and scrape the material precision. By rotating the switching cartridge unit 500, a smooth rotation of the cartridge is achieved. It should be emphasized that the scraping driving unit and the rotation switching type cartridge unit provided in this embodiment are only one specific embodiment, and in practical application, other mechanisms may be adopted, as long as the rotation of the cartridge and the rotation of the integrated scraper 404 can be realized, which is not limited by the present invention.
(4.1) rotation-switching cartridge Unit 500
The specific scene of the invention is as follows: the printing platform is fixed in position and is switched through the rotation of the material box, so that the material boxes of different printing materials are switched to the printing station under the printing platform, and the multi-material 3D printing is realized. In order to ensure printing precision, realize the stability and levelness of the rotary switching of the material box, prevent the thickness of the printing material in the material box from being uneven during the rotary switching, provide a rotary switching material box unit with fine design, the main body adopts an axisymmetric structure and adopts a slewing bearing to assist, thereby ensuring the rotary switching precision of the material box.
Referring to fig. 7, the rotary switching cartridge unit 500 includes a rotary disc 501, a rotary bearing 502, a rotary motor 503, a connection bracket 504, and n cartridges 505;
the rotary disc 501 is horizontally arranged, a connecting bracket 504 is fixedly arranged on the lower coaxial center of the rotary disc 501, a rotating motor 503 is fixedly arranged on the lower coaxial center of the connecting bracket 504, and the rotary disc 501 is driven to horizontally rotate through the rotating motor 503;
a rotary bearing 502 is coaxially arranged at the bottom of the rotary disc 501; the slewing bearing 502 adopts an inner ring slewing bearing and an outer ring slewing bearing, and the outer ring bearing is fixed with the surface of the base; the inner ring bearing is fixed with the bottom surface of the rotary disc 501, and the rotary disc 501 stably rotates under the supporting action of the rotary bearing 502;
n cartridges 505 and one cleaning and air drying unit 600 are fixedly installed along the ring shape on the surface of the rotary disc 501; for example, 5 cartridges 505 and one purge air dryer unit 600 may be installed. When the rotary disc 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, the material box 505, the printing platform and the ultraviolet optical unit which are positioned at the printing station are positioned on the same vertical line up and down; 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; by the rotation of the rotary plate 501, the rotation switching of each cartridge 505 and the cleaning and air drying unit 600 is realized.
(4.2) scraping driving unit 400
Referring to fig. 5, 6 and 7, the scraping driving unit 400 includes: a scraping rotary disc 401, a scraping rotary bearing 402 and a scraping motor 403.
Wherein, the outer circumference of the scraping rotary disk 401 is extended outwards to fixedly mount n integrated scrapers 404; each integrated doctor blade 404 is located above a corresponding one of the cartridges 505; each group of feeding units 405 corresponds to one integrated scraper 404 and is used for independently feeding materials to the integrated scraper 404;
the scraping rotary disc 401 is positioned above the rotary disc 501, and a scraping rotary bearing 402 is coaxially arranged between the scraping rotary 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 disk 401 is enabled to stably rotate during scraping through the supporting function of the scraping rotary bearing 402, and the scraping rotary disk 401, the integrated scraper 404 and the feeding unit 405 synchronously move during scraping, so that the relative positions of the integrated scraper 404 and the corresponding feeding unit 405 are ensured to be unchanged;
a scraping motor 403 is fixedly arranged on the lower coaxial center of the scraping rotary disk 401, and the scraping rotary disk 401 is driven to rotate through the scraping motor 403;
when the scraping rotary disc 401 rotates, the integrated scraper 404 and the feeding unit 405 are driven to synchronously rotate to realize scraping; the scraping motor 403 is fixed on the connecting bracket 504 of the rotary switching type material box unit 500, and when the rotary switching type material box unit 500 performs rotary motion, the scraping motor 403, the scraping rotary disk 401, the integrated scraper 404 and the feeding unit 405 are driven to perform integral synchronous motion.
As a specific embodiment, an output shaft of the scraping motor 403 is sleeved with an installation angle limiting sheet 406, and the angle limiting sheet 406 has a fan-shaped structure; a contact switch 407 is fixedly installed on the 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 sheet 406 and the contact switch 407.
Specifically, the angle limiting piece 406 has a fan-shaped structure, and two endpoints of the fan are P1 and P2, respectively. When P1 contacts the contact switch 407, the integrated scraper 404 is positioned at the left side C1 of the material box 505; then, the scraping motor 403 rotates and drives the integrated scraper 404 and the angle limiting sheet 406 to synchronously rotate, and at this time, when the angle limiting sheet 406 rotates, the fan-shaped arc line of the angle limiting sheet 406 continuously contacts with the contact switch 407; the integrated doctor 404 rotates from the left C1 position to the right C2 position of the cartridge 505;
when P2 of the angle limiting piece 406 contacts the contact switch 407, the integrated doctor 404 is rotated just to the right side C2 position of the cartridge 505; then, the scraping motor 403 is triggered to reversely rotate, so that the integrated scraper 404 rotates from the right side C2 position to the left side C1 position of the magazine 505, and at the same time, the angle limiting piece 406 rotates, so that the P1 end point is continuously close to the contact switch 407, and when the P1 end point is in contact with the contact switch 407, the integrated scraper 404 just rotates to the left side C1 position of the magazine 505. This is continuously circulated to realize the reciprocating swinging motion of the integrated scraper 404 in the material box 505.
The invention also provides a feeding and paving integrated method for the 3D printing and paving integrated scraper, which comprises the following steps of:
step 1, the heights of the left scraper 4042 and the right scraper 4043 are adjusted, and then the scraper cavity 4041A of the scraper frame 4041 is arranged in the material box 505, so that the distances between the bottom ends of the left scraper 4042 and the right scraper 4043 and the bottom surface of the material box 505 are one printing layer thick;
step 2, the feeding unit 405, the scraper frame 4041, the left scraper 4042 and the right scraper 4043 are driven by the scraper driving unit to reciprocate in the inner cavity of the material box 505, during the movement, on one hand, the feeding unit 405 gradually supplies a set amount of printing material into the scraper cavity 4041A, and since the scraper cavity 4041A is a through hollow structure cavity, the set amount of printing material passes through the scraper cavity 4041A and is paved in the material box 505; on the other hand, the left and right blades 4042 and 4043 completely and uniformly spread a set amount of printing material inside the magazine 505 during the movement;
the specific method comprises the following steps:
the feeding unit 405, the scraper frame 4041, the left scraper 4042 and the right scraper 4043 are controlled to integrally rotate anticlockwise towards the right side of the material box 505, and in the rotating process, the right scraper 4043 performs primary scraping operation, and the left scraper 4042 performs secondary scraping operation until the right scraper 4043 is completely attached to the right side wall of the material box 505;
then, the feeding unit 405, the scraper frame 4041, the left scraper 4042 and the right scraper 4043 are controlled to integrally and reversely move, namely, clockwise rotation is performed to the left side of the material box 505, in the rotation process, the left scraper 4042 performs primary scraping operation, and the right scraper 4043 performs secondary scraping operation until the left scraper 4042 is completely attached to the left side wall of the material box 505;
thus, the feeding and spreading integration is realized.
The integrated scraper for 3D printing and feeding provided by the invention has the following advantages:
1) The integrated feeding and spreading integrated scraper is a spreading and scraping piece with double scrapers and scraper cavities for accommodating printing materials, and the traditional feeding and spreading are integrated into spreading and feeding at the same time, so that the spreading and feeding efficiency is improved;
2) The height of the scraper is adjustable, so that scraping materials with different layer thicknesses are realized, and various use requirements are met.
3) Be used for 3D to print and supply material integration scraper and scrape material rotary disk through three orthogonal plane structure cooperation installation, guarantee to supply the high stability of material integration scraper when rotatory scraping or straight line round trip scraping.
Therefore, the integrated scraper for 3D printing and feeding is an integrated scraper for feeding and feeding, and can simplify the workflow of feeding before feeding and feeding in traditional 3D printing into feeding and feeding at the same time, and the structure is simpler. The design of orthogonal plane cooperation leaning surface makes the installation of supplying and laying integration scraper dismantlement realize high repeated positioning accuracy to guarantee each layer thickness uniformity in the 3D printing process, finally directly guarantee 3D and print 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 can be fixed by adopting a single loosening-preventing screw, so that high stability and high precision can be realized, and the scraper and the material box after the photo-curing 3D printing is finished can be cleaned conveniently.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which is also intended to be covered by the present invention.
Claims (4)
1. A utility model provides a be used for 3D to print and supply material integration scraper which characterized in that includes: a doctor blade holder (4041), a left doctor blade (4042) and a right doctor blade (4043);
the scraper frame (4041) comprises a scraper cavity (4041A) and a scraper arm (4041B) which is fixedly integrated with the inner side of the scraper cavity (4041A); the scraper arm (4041B) is connected with a scraping driving unit; the scraper cavity (4041A) is positioned in the material box (505), the scraper cavity (4041A) is provided with a penetrating hollow structural cavity, and the length and radian of the scraper cavity (4041A) are matched with those of the inner cavity of the material box (505) and are used for reciprocating rotation along the inner cavity of the material box (505);
the left side and the right side of the scraper cavity (4041A) are respectively provided with the left scraper (4042) and the right scraper (4043) with adjustable heights; the distance between the left scraper (4042) and the right scraper (4043) and the bottom surface of the scraper cavity (4041A) is one printing layer thickness;
the position of the printing platform is fixed, and the material boxes of different printing materials are switched to the printing stations under the printing platform through rotating and switching the material boxes, so that multi-material 3D printing is realized; the rotary switching type material box unit (500) comprises a rotary disc (501), a rotary bearing (502), a rotary motor (503), a connecting bracket (504) and n material boxes (505);
the surface of the rotary disc (501) is fixedly provided with n material boxes (505) and a cleaning and air drying unit (600) along the ring shape; when the rotary disc (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, the material box (505), the printing platform and the ultraviolet light unit which are positioned at the printing station are positioned on the same vertical line up and down; when the cleaning and air drying unit (600) rotates to a printing station, the cleaning and air drying unit is used for cleaning and air drying the printing surface of the printing platform; by the rotation of the rotary disc (501), the rotation switching of each material box (505) and the cleaning and air drying unit (600) is realized;
further comprises feeding units (405), each feeding unit (405) corresponds to one scraper blade (4041) and is used for independently feeding into a scraper cavity (4041A) of the scraper blade (4041); the feeding unit (405) is connected with the scraping driving unit;
the feeding unit (405) comprises a feed cylinder (405A), a feed conveying pipe (405B) and an electromagnetic valve (405C); the conveying pipe (405B) is arranged right above the scraper cavity (4041A) and is arranged in parallel with the scraper cavity (4041A), and the conveying pipe (405B) is provided with a plurality of discharging holes towards the bottom of the scraper cavity (4041A) so as to feed the scraper cavity (4041A) in a linear form;
the whole formed by the scraper rest (4041), the left scraper (4042) and the right scraper (4043) is called an integrated scraper (404); the scraping driving unit is used for synchronously driving the feeding unit (405) and the integrated scraper (404) to rotate so as to realize the scraping action; the scraping driving unit (400) includes: a scraping rotary disc (401), a scraping rotary bearing (402) and a scraping motor (403); the periphery of the scraping rotary disk (401) is extended outwards to fixedly install n integrated scrapers (404).
2. The integrated doctor blade for 3D printing and feeding according to claim 1, wherein the doctor blade arm (4041B) is formed with three orthogonal planes, is fitted into a mounting groove of the doctor blade driving unit, and the doctor blade arm (4041B) is placed into the mounting groove and locked and fixed.
3. The integrated doctor blade for 3D printing and feeding according to claim 1, wherein a long waist hole is formed on each of the left side and the right side of the doctor blade cavity (4041A), and the left doctor blade (4042) and the right doctor blade (4043) are locked and fixed through the long waist hole by using locking screws after being adjusted in height.
4. A feeding integration method for a 3D printing feeding integration doctor blade according to any one of claims 1-3, comprising the steps of:
step 1, adjusting the heights of a left scraper (4042) and a right scraper (4043), and then placing a scraper cavity (4041A) of a scraper rest (4041) in a material box (505) to enable the bottom ends of the left scraper (4042) and the right scraper (4043) to be separated from the bottom surface of the material box (505) by a printing layer thickness;
step 2, the feeding unit (405), the scraper frame (4041), the left scraper (4042) and the right scraper (4043) are driven to reciprocate in the inner cavity of the material box (505) through the scraper driving unit, and during the movement, on one hand, the feeding unit (405) gradually supplies a set amount of printing material into the scraper cavity (4041A), and the scraper cavity (4041A) is a penetrating hollow structure cavity, so that the set amount of printing material passes through the scraper cavity (4041A) and is paved in the material box (505); on the other hand, the left scraper (4042) and the right scraper (4043) completely and uniformly spread a set amount of printing material inside the material box (505) in the movement process;
the specific method comprises the following steps:
the feeding unit (405), the scraper frame (4041), the left scraper (4042) and the right scraper (4043) are controlled to integrally rotate anticlockwise towards the right side of the material box (505), and in the rotating process, the right scraper (4043) performs primary scraping operation, and the left scraper (4042) performs secondary scraping operation until the right scraper (4043) is completely attached to the right side wall of the material box (505);
then, the feeding unit (405), the scraper frame (4041), the left scraper (4042) and the right scraper (4043) are controlled to integrally and reversely move, namely, the left scraper (4042) rotates clockwise to the left side of the material box (505), in the rotating process, the left scraper (4042) performs primary scraping operation, and the right scraper (4043) performs secondary scraping operation until the left scraper (4042) is completely attached to the left side wall of the material box (505);
thus, the feeding and spreading integration is realized.
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| CN114393829A (en) | 2022-04-26 |
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