CN112247146B - Multi-material powder laying mechanism of metal three-dimensional printer - Google Patents
Multi-material powder laying mechanism of metal three-dimensional printer Download PDFInfo
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- CN112247146B CN112247146B CN202011037949.0A CN202011037949A CN112247146B CN 112247146 B CN112247146 B CN 112247146B CN 202011037949 A CN202011037949 A CN 202011037949A CN 112247146 B CN112247146 B CN 112247146B
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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
- B33Y10/00—Processes of additive manufacturing
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a multi-material powder spreading mechanism of a metal three-dimensional printer, which comprises a powder spreading assembly and a material guide hopper, wherein a forming cavity is positioned right below a scanning galvanometer, the powder spreading assembly comprises a midbody and a scraper mechanism, the midbody can horizontally and linearly move back and forth along a powder cavity in the direction of the forming cavity, a hopper groove for blanking is formed in the middle of the upper surface of the midbody, the scraper mechanisms are symmetrically and fixedly connected to two ends of the midbody, the material guide hopper is fixedly arranged on the inner wall of the top of a cover with a door, and an outlet at the bottom of the material guide hopper faces right above the forming cavity; the intermediate body with the straight line horizontal movement is arranged, so that the light material is scraped by the powder cavity and pushed to spread layers, the common material falls into the hopper groove and is spread by the scraper after receiving the material, and meanwhile, different particle size materials are respectively spread by the scrapers at two ends, so that sequential feeding of two gradient materials is realized, the two materials are independent of each other, cannot influence each other or generate mixing, and the device is suitable for forming the gradient materials.
Description
Technical Field
The invention relates to the technical field of laser selection, in particular to a multi-material powder laying mechanism of a metal three-dimensional printer.
Background
Three-dimensional printing, more precisely, the selective laser or electron beam melting technique is a net forming process in which three-dimensional figures are sliced layer by layer to generate scanning tracks, powder is mechanically spread on a forming platform with fixed size by a scraper, laser or electron beam is used as a heat source, the laser scans and melts/sinters the powder along the tracks through a vibrating mirror, the electron beam scans and melts or sinters the powder along the tracks through a deflection coil, a layer of new powder is spread after the height of the powder bed is reduced by one layer, and the process materials are stacked layer by layer. With the development and progress of science and technology, the application of the three-dimensional printing technology in the field of metal material forming is expected.
At present, a common metal three-dimensional printer on the market has multiple purposes, but the layering of a powder bed is basically realized by adopting a mode of blanking from the upper part or spreading materials by a powder cavity scraper. However, the above design is generally only suitable for the molding operation of a single material or a single gradient material, and no corresponding design exists for molding of composite materials, especially for molding of multiple gradient materials. The reason for this is that different gradient materials have different powder particles with different particle sizes and may also have different masses. Therefore, no matter which feeding mode is adopted, the feeding requirements of various gradient materials cannot be met.
Disclosure of Invention
In view of this, the invention provides a multi-material powder laying mechanism of a metal three-dimensional printer suitable for molding of various gradient composite materials.
The technical scheme of the invention is realized as follows: the invention provides a multi-material powder spreading mechanism of a metal three-dimensional printer, which comprises a platform, a cover shell with a door, a scanning vibrating mirror and a quantitative blanking mechanism, wherein the cover shell with the door is fixedly and reversely buckled on the upper surface of the platform; the upper surface of the platform is provided with a forming cavity and a powder cavity, the forming cavity and the powder cavity are independent from each other, and the forming cavity is positioned under the scanning galvanometer; the powder spreading assembly comprises an intermediate body and a scraper mechanism, the intermediate body is arranged right above the upper surface of the platform, the intermediate body can horizontally and linearly move back and forth along the direction from the powder cavity to the forming cavity, and a hopper groove for blanking is formed in the middle of the upper surface of the intermediate body; the scraper mechanisms are symmetrically and fixedly connected to two ends of the intermediate body, and scrapers of the scraper mechanisms move along with the intermediate body and pass right above the powder cavity and the forming cavity; the guide hopper is fixedly arranged on the inner wall of the top of the door-equipped housing, the inlet of the top of the guide hopper penetrates through the top of the door-equipped housing and is fixedly communicated with the outlet of the bottom of the quantitative discharging mechanism, and the outlet of the bottom of the guide hopper faces to the position right above the forming cavity.
On the basis of the technical scheme, preferably, the distance between the outlet at the bottom of the material guide hopper and the upper surface of the middle body is less than one centimeter.
Further preferably, the top notch of the hopper groove and the outlet at the bottom of the guide hopper are both in a long strip shape and are parallel to each other.
On the basis of the technical scheme, preferably, the upper surface of the platform is further provided with a rectangular limiting groove, and the forming cavity and the powder cavity are arranged at two ends of the limiting groove.
On the basis of the technical scheme, preferably, the upper surface of the platform is further symmetrically provided with two recovery tanks, the forming cavity and the powder cavity are located between the two recovery tanks, and the scraper of the scraper mechanism moves along with the intermediate body to pass through the powder cavity, the forming cavity and the recovery tanks.
On the basis of the technical scheme, the powder spreading machine further comprises a transmission assembly and a motor, wherein the transmission assembly comprises a driving wheel, a transmission shaft, a transmission wheel and two driven wheels, and the powder spreading assembly comprises a locking block; the motor is fixedly arranged on the outer side wall of the cover shell with the door; the driving wheel and the driving wheel are fixedly arranged on the platform, are symmetrically arranged at two sides of the intermediate body and are close to the powder cavity, and the driving wheel is connected to the output shaft of the motor; the transmission shaft is coupled between the driving wheel and the transmission wheel; two driven wheels are fixedly arranged on the platform, symmetrically arranged on two sides of the intermediate body and close to the forming cavity, and respectively connected with the driving wheel and the driving wheel in a belt transmission manner; the locking pieces are symmetrically and fixedly connected to two sides of the intermediate body, and the inside of each locking piece penetrates through the belt and is locked on the belt.
Still further preferably, the powder laying assembly further comprises a sliding block and a straight rail; the straight rails are fixedly connected to the upper surface of the platform, symmetrically arranged on two sides of the intermediate body and parallel to the transmission belt; the sliding blocks are symmetrically connected to two sides of the middle body and are respectively connected to the straight rails on the corresponding sides in a sliding mode.
On the basis of the technical scheme, the air guide device preferably further comprises an air guide cover, the upper surface of the platform is further provided with two air ports, the two air ports are symmetrically formed in two sides of the forming cavity and are used for blowing and exhausting air respectively, and a scraper of the scraper mechanism does not pass through the air ports right above along with the movement of the intermediate body; the wind scoopers are fixedly buckled on the upper surface of the platform in a reverse mode and cover right above the air opening, the side faces of the wind scoopers are open, and the side face openings of the two wind scoopers are arranged oppositely.
On the basis of the technical scheme, the scraper device is preferable to further comprise a protective shell, the protective shell is fixedly buckled on the upper surface of the platform in a reverse buckling mode, and the protective shell covers the upper surface area of the platform except for the scraper passing path of the scraper mechanism.
Compared with the prior art, the multi-material powder laying mechanism of the metal three-dimensional printer has the following beneficial effects that:
(1) The intermediate body with the straight line horizontal movement is arranged, so that the light material is scraped by the powder cavity and pushed to spread layers, the common material falls into the hopper groove and is spread by the scraper after receiving the material, and meanwhile, different particle size materials are respectively spread by the scrapers at two ends, so that sequential feeding of two gradient materials is realized, the two materials are independent of each other, cannot influence each other or generate mixing, and the device is suitable for forming the gradient materials.
(2) Set up spacing groove frame and live into die cavity and powder chamber, can avoid spreading remaining powder after the powder and run outside the spacing groove, lead to the problem that platform pollutes and the powder is difficult to retrieve.
(3) Set up two wind gaps and take out the wind simultaneously, can clear away and fill up the surplus powder that becomes the die cavity and bury the formed part after whole shaping flow is accomplished to carry out the powder and retrieve, also be convenient for take out the formed part.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a perspective view of the powder placement mechanism of the present invention;
FIG. 2 is a top view of the powder spreading mechanism of the present invention;
fig. 3 is a perspective view of the protective case of the present invention.
In the figure: 1. a platform; 11. a molding cavity; 12. a powder chamber; 13. a limiting groove; 14. a recovery tank; 15. a tuyere; 2. a door-equipped enclosure; 3. scanning a galvanometer; 4. a quantitative blanking mechanism; 5. a powder paving component; 51. an intermediate; 511. a bucket; 52. a scraper mechanism; 53. a slider; 54. a locking block; 55. a straight rail; 6. a transmission assembly; 61. a driving wheel; 62. a drive shaft; 63. a driving wheel; 64. a driven wheel; 7. a motor; 8. a wind scooper; 9. a protective shell; 10. a material guiding hopper.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments of the present invention, belong to the protection scope of the present invention.
As shown in fig. 1 and in combination with fig. 2, the multi-material powder spreading mechanism of the metal three-dimensional printer of the invention comprises a platform 1, a door-equipped housing 2, a scanning galvanometer 3 and a quantitative blanking mechanism 4, wherein the door-equipped housing 2 is fixedly and reversely buckled on the upper surface of the platform 1, the scanning galvanometer 3 and the quantitative blanking mechanism 4 are both fixedly installed on the top of the door-equipped housing 2, and the multi-material powder spreading mechanism further comprises a powder spreading component 5, a transmission component 6, a motor 7, an air guide cover 8, a protective shell 9 and a material guide hopper 10.
Wherein, the upper surface of platform 1 is seted up into die cavity 11, powder chamber 12, and die cavity 11 and powder chamber 12 are independent each other, and die cavity 11 is located under scanning galvanometer 3, and powder chamber 12 is used for storing metal powder, can form the formed part in the die cavity 11.
It should be noted that, since the light material has a light weight, if the quantitative material feeding mechanism 4 is used to feed the material to the material guiding hopper 10 and finally to feed the material to the hopper 511, the material will pass through a plurality of sliding surfaces during the feeding process, and a certain distance exists between the outlet at the bottom of the material guiding hopper 10 and the top notch of the hopper 511, which may cause scattering of the powder particles of the light material, and further cause insufficient powder particle amount required for powder paving, and finally affect the forming effect. Therefore, the light material in the design is stored in the powder cavity 12, and the common material is stored in the quantitative blanking mechanism 4.
Further, two recovery grooves 14 are symmetrically formed in the upper surface of the platform 1, the molding cavity 11 and the powder cavity 12 are located between the two recovery grooves 14, and a scraper of the scraper mechanism 52 moves along with the middle body 51 and passes through the powder cavity 12, the molding cavity 11 and the recovery grooves 14 directly above the middle body, so that residual powder in each time of powder layering scraping is recovered.
The scraper mechanisms 52 are symmetrically and fixedly connected to two ends of the middle body 51, and scrapers of the scraper mechanisms 52 move along with the middle body 51 to pass through the powder cavity 12 and the molding cavity 11.
It should be noted that the intermediate body 51 and the scraper mechanism 52 capable of moving back and forth in a horizontal straight line are prior art, and have relatively complicated mechanical structures to realize powder scraping and layering.
Preferably, the distance between the outlet at the bottom of the material guiding hopper 10 and the upper surface of the middle body 51 is less than one centimeter, so as to avoid the risk of scattering when the metal powder particles fall down, and the metal powder particles can more accurately fall into the hopper 511. Further, the top notch of the hopper 511 and the bottom outlet of the material guiding hopper 10 are both in a strip shape and are parallel to each other.
The motor 7 is fixedly installed at an outer sidewall of the door housing 2 to provide a driving force.
The transmission assembly 6 comprises a driving wheel 61, a transmission shaft 62, a transmission wheel 63 and two driven wheels 64, the powder spreading assembly 5 comprises a locking block 54, the driving wheel 61 and the transmission wheel 63 are fixedly arranged on the platform 1, the driving wheel 61 and the transmission wheel 63 are symmetrically arranged at two sides of the intermediate body 51 and are close to the powder cavity 12, and the driving wheel 61 is coupled to an output shaft of the motor 7; the transmission shaft 62 is coupled between the driving wheel 61 and the transmission wheel 63; two driven wheels 64 are fixedly arranged on the platform 1, the two driven wheels 64 are symmetrically arranged at two sides of the intermediate body 51 and close to the forming cavity 11, and the two driven wheels 64 are respectively in belt transmission connection with the driving wheel 61 and the driving wheel 63; the locking blocks 54 are symmetrically and fixedly connected to two sides of the middle body 51, and the locking blocks 54 penetrate through the belt and are locked on the belt.
When the technical scheme is adopted, the motor 7 drives the driving wheel 61 and the driving wheel 63 to rotate in the same frequency and direction through the transmission shaft 62, and drives the two driven wheels 64 to rotate in the same frequency and direction, so that the two locking blocks 54 locked on the belt are driven to move in the same direction at the same time, the horizontal straight line of the intermediate body 51 moves back and forth, and the powder spreading layer is scraped by the scraper mechanism 52.
In order to remove the excessive powder which is filled in the forming cavity 11 and buries the formed part so as to recycle the powder and take out the formed part conveniently after the forming operation is finished, two air ports 15 are also formed in the upper surface of the platform 1, the two air ports 15 are symmetrically formed in two sides of the forming cavity 11, the two air ports 15 are used for blowing and exhausting air respectively, and a scraper of the scraper mechanism 52 moves along with the intermediate body 51 and cannot pass through the position right above the air ports 15.
The wind scoopers 8 are fixedly and reversely buckled on the upper surface of the platform 1 and cover right above the air opening 15, the side surfaces of the wind scoopers 8 are opened, and the side openings of the two wind scoopers 8 are oppositely arranged.
When the technical scheme is adopted, the blowing air is blown out from one air opening 15, passes through the air guide cover 8 and blows through the forming cavity 11, the forming cavity 11 is blown into the other air guide cover 8, and the other air opening 15 is used for exhausting air to suck and recover the powder.
In addition, as shown in fig. 1 and in combination with fig. 3, the protective shell 9 is fixedly buckled on the upper surface of the platform 1, and the protective shell 9 covers the upper surface area of the platform 1 except the scraper passing path of the scraper mechanism 52, so that on one hand, the transmission assembly 6 is isolated and protected, on the other hand, the powder is limited to exist in the range of the scraper passing path, and the platform 1 is prevented from being polluted and difficult to clean.
As an alternative embodiment, the powder laying assembly 5 further comprises a slide 53 and a straight rail 55; the straight rails 55 are fixedly connected to the upper surface of the platform 1, and the straight rails 55 are symmetrically arranged on two sides of the intermediate body 51 and are parallel to the transmission belt; the sliding blocks 53 are symmetrically connected to two sides of the middle body 51 and are respectively connected to the straight rails 55 on the corresponding sides in a sliding manner, so as to perform a straight guiding function.
As an optional embodiment, the upper surface of the platform 1 is further provided with a rectangular limiting groove 13, the forming cavity 11 and the powder cavity 12 are arranged at two ends of the limiting groove 13, and the problems that the platform 1 is polluted and the powder is difficult to recycle due to the fact that the residual powder runs out of the limiting groove 13 after powder spreading can be avoided.
The working principle is as follows:
because the light material quality is lighter, if the mode that quantitative unloading mechanism 4 throws the material to guide hopper 10 and finally falls the material to bucket 511 carries out the material loading, can pass through a plurality of landing faces in this process, and there is certain distance between guide hopper 10 bottom export and the top notch of bucket 511, probably leads to the powder particle of light material to scatter, and then causes the required powder particle volume of shop's powder not enough, finally influences the shaping effect. Therefore, the light material in the design is stored in the powder cavity 12, and the common material is stored in the quantitative blanking mechanism 4.
When the forming operation is performed, the motor 7 drives the driving wheel 61 and the driving wheel 63 to rotate, and drives the driven wheel 64 to rotate, so as to drive the intermediate body 51 to move horizontally from one end of the powder cavity 12 to the other end of the forming cavity 11. In the process, a scraper mechanism 52 facing one end of the forming cavity 11 scrapes and pushes the light material in the powder cavity 12 to the forming cavity 11 to lay up. Because the distance between the scraper of the scraper mechanism 52 and the upper surface of the platform 1 is only one powder spreading layer, the forming cavity 11 is only spread with one powder spreading layer, and the redundant materials are pushed into the recovery tank 14.
After the scanning galvanometer 3 performs sintering operation on the first layer, the intermediate body 51 moves back to the lower part of the material guide hopper 10 so as to receive the common materials which quantitatively fall from the material quantitative blanking mechanism 4, and fall from the hopper slot 511 to the upper surface area of the platform 1 between the forming cavity 11 and the powder cavity 12. At this time, the intermediate body 51 moves, so that the scraper mechanism 52 at the end opposite to the molding cavity 11 scrapes and pushes the common material to fully spread the molding cavity 11, thereby obtaining a second layer, and the scanning galvanometer 3 carries out sintering operation on the second layer.
Repeating the above steps to complete the whole molding process.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a powder mechanism is spread to many materials of metal three-dimensional inkjet printer, includes platform (1), takes a housing (2), scans mirror (3) and quantitative unloading mechanism (4) of shaking, takes a housing (2) fixed back-off in platform (1) upper surface, scans mirror (3) and the equal fixed mounting in the top of taking a housing (2) of shaking and quantitative unloading mechanism (4), its characterized in that: the powder spreading device also comprises a powder spreading component (5) and a material guide hopper (10);
the upper surface of the platform (1) is provided with a forming cavity (11) and a powder cavity (12), the forming cavity (11) and the powder cavity (12) are independent of each other, and the forming cavity (11) is positioned under the scanning galvanometer (3);
the powder paving assembly (5) comprises an intermediate body (51) and a scraper mechanism (52), the intermediate body (51) is arranged right above the upper surface of the platform (1), the intermediate body (51) can horizontally and linearly move back and forth along the powder cavity (12) towards the forming cavity (11), a hopper groove (511) for blanking is formed in the middle of the upper surface of the intermediate body (51), and the top notch of the hopper groove (511) and the bottom outlet of the guide hopper (10) are both in a long strip shape and are parallel to each other;
the scraper mechanisms (52) are symmetrically and fixedly connected to two ends of the intermediate body (51), and scrapers of the scraper mechanisms (52) move along with the intermediate body (51) and pass right above the powder cavity (12) and the forming cavity (11);
the material guide hopper (10) is fixedly installed on the inner wall of the top of the door-equipped housing (2), an inlet in the top of the material guide hopper (10) penetrates through the top of the door-equipped housing (2) and is fixedly communicated with an outlet in the bottom of the quantitative discharging mechanism (4), an outlet in the bottom of the material guide hopper (10) faces to the position right above the forming cavity (11), and the distance between the outlet in the bottom of the material guide hopper (10) and the upper surface of the intermediate body (51) is smaller than one centimeter.
2. The multi-material powder spreading mechanism of the metal three-dimensional printer according to claim 1, characterized in that: the upper surface of the platform (1) is further provided with a rectangular limiting groove (13), and the forming cavity (11) and the powder cavity (12) are arranged at two ends of the limiting groove (13).
3. The multi-material powder spreading mechanism of the metal three-dimensional printer according to claim 1, characterized in that: two recovery tanks (14) are still seted up to platform (1) upper surface symmetry, become die cavity (11) and powder chamber (12) and be located between two recovery tanks (14), the scraper of scraper mechanism (52) moves through powder chamber (12), die cavity (11) and recovery tank (14) directly over along with midbody (51).
4. The multi-material powder spreading mechanism of the metal three-dimensional printer according to claim 1, characterized in that: the powder spreading machine is characterized by further comprising a transmission assembly (6) and a motor (7), wherein the transmission assembly (6) comprises a driving wheel (61), a transmission shaft (62), a transmission wheel (63) and two driven wheels (64), and the powder spreading assembly (5) comprises a locking block (54);
the motor (7) is fixedly arranged on the outer side wall of the cover shell (2) with the door;
the driving wheel (61) and the driving wheel (63) are fixedly arranged on the platform (1), the driving wheel (61) and the driving wheel (63) are symmetrically arranged on two sides of the intermediate body (51) and are close to the powder cavity (12), and the driving wheel (61) is coupled to an output shaft of the motor (7);
the transmission shaft (62) is coupled between the driving wheel (61) and the transmission wheel (63);
the two driven wheels (64) are fixedly arranged on the platform (1), the two driven wheels (64) are symmetrically arranged on two sides of the intermediate body (51) and close to the forming cavity (11), and the two driven wheels (64) are respectively in belt transmission connection with the driving wheel (61) and the driving wheel (63);
the locking blocks (54) are symmetrically and fixedly connected to two sides of the middle body (51), and the inside of each locking block (54) penetrates through the belt and is locked on the belt.
5. The multi-material powder spreading mechanism of the metal three-dimensional printer according to claim 4, wherein: the powder spreading assembly (5) further comprises a sliding block (53) and a straight rail (55);
the straight rails (55) are fixedly connected to the upper surface of the platform (1), and the straight rails (55) are symmetrically arranged on two sides of the intermediate body (51) and are parallel to the transmission belt;
the sliding blocks (53) are symmetrically connected to two sides of the middle body (51) and are respectively connected to the straight rails (55) on the corresponding sides in a sliding mode.
6. The multi-material powder laying mechanism of the metal three-dimensional printer according to claim 1, characterized in that: the air guide cover (8) is further included, two air ports (15) are further formed in the upper surface of the platform (1), the two air ports (15) are symmetrically formed in two sides of the forming cavity (11), the two air ports (15) are used for blowing air and exhausting air respectively, and a scraper of the scraper mechanism (52) moves along with the intermediate body (51) and cannot pass through the position right above the air ports (15);
the wind scoopers (8) are fixedly and reversely buckled on the upper surface of the platform (1) and cover the upper side of the air port (15), the side surfaces of the wind scoopers (8) are open, and the side openings of the two wind scoopers (8) are arranged oppositely.
7. The multi-material powder spreading mechanism of the metal three-dimensional printer according to claim 1, characterized in that: the scraper protection device is characterized by further comprising a protection shell (9), wherein the protection shell (9) is fixedly buckled on the upper surface of the platform (1) in a reverse buckling mode, and the protection shell (9) covers the upper surface area of the platform (1) except the scraper passing path of the scraper mechanism (52).
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| CN202011037949.0A CN112247146B (en) | 2020-09-28 | 2020-09-28 | Multi-material powder laying mechanism of metal three-dimensional printer |
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| CN202011037949.0A CN112247146B (en) | 2020-09-28 | 2020-09-28 | Multi-material powder laying mechanism of metal three-dimensional printer |
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| CN112247146B true CN112247146B (en) | 2022-11-04 |
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| CN113751728B (en) * | 2021-09-02 | 2023-03-14 | 湖北华程三维科技有限公司 | Three-dimensional printing equipment for multi-material additive manufacturing |
| CN113695598B (en) * | 2021-09-02 | 2023-01-20 | 湖北华程三维科技有限公司 | Laser sintering additive manufacturing equipment |
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| CN105562687B (en) * | 2014-10-10 | 2018-12-25 | 南京理工大学 | The precinct laser that different powder are used in combination melts powder feeding and spreading device |
| CN204898074U (en) * | 2015-09-07 | 2015-12-23 | 苏州西帝摩三维打印科技有限公司 | Three -dimensional printing apparatus of SLM |
| CN210080723U (en) * | 2019-03-22 | 2020-02-18 | 陕西科技大学 | Multi-material 3D printer |
| CN111873414A (en) * | 2019-05-03 | 2020-11-03 | 罗天珍 | Special slit self-sealing powder spreading device for three-dimensional printer |
| CN110153411B (en) * | 2019-05-30 | 2024-04-05 | 南京尚吉智能装备科技有限公司 | Dot matrix type powder paving 3D printing device and printing method based on resistance heating |
| CN114289740A (en) * | 2021-12-31 | 2022-04-08 | 南京中科煜宸激光技术有限公司 | Integrated scraper device suitable for large-breadth forming of selective laser melting and powder-spreading type additive manufacturing method |
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