CN114346265A - Powder feeding device for selective laser melting and digital material forming - Google Patents
Powder feeding device for selective laser melting and digital material forming Download PDFInfo
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- CN114346265A CN114346265A CN202111502680.3A CN202111502680A CN114346265A CN 114346265 A CN114346265 A CN 114346265A CN 202111502680 A CN202111502680 A CN 202111502680A CN 114346265 A CN114346265 A CN 114346265A
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Abstract
The invention discloses a powder feeding device for forming a laser selective melting digital material, which comprises two independent powder feeding mechanisms; the two independent powder feeding mechanisms have the functions of weighing and proportioning multiple materials and fixed-point conveying; the powder of various materials can be quantitatively and accurately supplied according to the required weight ratio, so that the powder proportion in each powder laying layer is controllable; and the specified material can be accurately conveyed to the preset position of the forming surface, so that the material composition in different directions in the powder laying layer changes in a gradient manner every time. This powder feeding device, through organic the integration with two independent powder feeding mechanism, both can compromise the powder and put in the powder fixed point fixed area of different materials again, improved the utilization ratio and the many materials suitability of powder greatly, provide a brand-new technical scheme about spreading powder and many materials hourglass powder and combining together for 3D prints technical field.
Description
Technical Field
The invention relates to the field of additive manufacturing, in particular to a powder feeding device for selective laser melting and digital material forming.
Background
The digital material selective laser melting technology is additive manufacturing technology which uses multiple powder materials (at least one of which is a metal material) to prepare a single complex functional part with multiple material structures.
Up to now, most commercial rapid prototyping machines have been designed and manufactured starting from a single material product, and 3D printing has often been limited to using only one material at a time, or to hybrid printing from different materials. It is difficult to meet the increasing complexity requirements of industrial products and the flexibility and efficiency requirements required for market globalization.
However, the digital material has huge potential with severe requirements in some fields. The digital material has higher strength and toughness, can bear larger mechanical stress and thermal stress, can bear huge temperature difference, and keeps longer service life, which are excellent performances that the traditional material does not have.
At present, the research of the laser selective melting technology of the digital materials is still in the stage of scientific research and customs clearance, the commercial equipment is rare, and the method can be mainly divided into two technical means according to the mode that various materials are freely arranged in different layers or different areas in the same layer according to requirements: one is to realize multi-material distribution in the Z-axis direction of the part; another is to achieve multi-material distribution in the XY plane of the part.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a powder feeding device for selective laser melting and digital material forming. The device can realize the quantitative and accurate supply of two or more than two kinds of powder according to the required weight ratio all the time, so that the powder proportion in each powder laying layer is controllable; and the selected powder can be accurately conveyed to a preset laying position, so that the material composition in different directions in each powder laying layer is changed in a gradient manner.
The invention is realized by the following technical scheme:
a powder feeding device for selective laser melting and digital material forming is located above a powder laying platform 1 in a selective laser melting printer forming chamber; the powder feeding device comprises a first powder feeding mechanism 2 and a second powder feeding mechanism 3;
first powder feeding mechanism 2, including top-down sets gradually: the powder weighing and proportioning device comprises a first powder storage bin 2-1, a powder weighing and proportioning bin 2-2, a rotary powder outlet bin 2-3 and a powder feeding channel 2-4;
the first powder storage bin 2-1 is internally provided with a plurality of powder bins for containing powder of different materials; each powder outlet of the powder bin is provided with an independent powder leakage plate 2-5; the powder leakage plates 2-5 are used for opening or closing the opening degree of the corresponding powder outlet of the powder bin;
the powder weighing proportioning bin 2-2 is used for weighing the powder from the first powder storage bin 2-1; the bottom of the powder weighing and proportioning bin 2-2 is provided with a powder discharge valve 2-6;
the rotary powder outlet bin 2-3 is used for receiving the powder which is subjected to proportioning and mixing from the powder weighing and proportioning bin 2-2;
and the powder feeding channel 2-4 is connected to a powder discharging valve 2-6 of the powder weighing and proportioning bin 2-2 and used for conveying the powder after proportioning and mixing to the powder spreading platform 1.
The rotary powder outlet bin 2-3 of the first powder feeding mechanism 2 comprises: a rotating shaft 2-7 and a shaft sleeve 2-8;
the rotating shaft 2-7 is positioned in the inner shaft sleeve 2-8 and can rotate relative to the shaft sleeve 2-8;
a plurality of powder collecting grooves 2-11 for containing powder are distributed on the circumferential surface of the rotating shaft 2-7; an upper gap 2-9 for receiving powder is arranged on the upper end surface of the shaft sleeve 2-8 and at a position 2-6 corresponding to the powder discharge valve of the powder weighing proportioning bin 2-2; a lower notch 2-10 for discharging powder is arranged on the lower end surface of the shaft sleeve 2-8;
when powder is collected, the powder collecting grooves 2-11 rotate to the upper notches 2-9, after the powder is discharged into the powder collecting grooves 2-11, the rotating shafts 2-7 rotate, the powder is conveyed to the lower notches 2-10, and then the powder is conveyed to the powder laying platform 1 through the powder conveying channels 2-4.
The second powder feeding mechanism 3 comprises a second powder storage bin 3-1 and a powder leaking nozzle 3-2;
the second powder storage bin 3-1 is internally provided with a plurality of storage grids 3-3 for containing powder made of different materials,
the tail part of the powder leakage nozzle 3-2 is provided with a plurality of independent powder channels 3-4; an independent powder leakage valve 3-5 is respectively arranged at the outlet of each powder channel 3-4;
the powder outlet of each storage grid 3-3 of the second powder storage bin 3-1 is correspondingly connected to a powder channel 3-4 at the tail part of the powder leakage nozzle 3-2 through an independent pipeline 3-6.
The powder leaking nozzle 3-2 is connected to one side of the longitudinal sliding table 4 in the forming chamber through a mounting frame 3-7; when in printing operation, the selected or switched powder enters the powder leakage nozzle 3-2 through the pipeline 3-6 corresponding to the storage grid 3-3 and is sent to the powder laying platform 1 through the powder leakage nozzle 3-2.
The mounting rack 3-7 is mounted on a slide rail 3-9 of the longitudinal sliding table 4 through a slide block 3-8; the longitudinal sliding table 4 is connected to the transverse sliding table 5;
the sliding blocks 3-8 linearly move along the sliding rails 3-9 of the longitudinal sliding table 4, the longitudinal sliding table 4 linearly moves along the length direction of the transverse sliding table 5, and then the powder leaking nozzle 3-2 is driven to complete translation in the direction X, Y, so that powder (fixed point) is leaked into the selected area of the powder laying platform 1.
The powder leakage plate 2-5 of the first powder storage bin 2-1 comprises an upper powder leakage plate 2-51 and a lower powder leakage plate 2-52 which can translate with each other;
the upper powder leakage plate 2-51 and the lower powder leakage plate 2-52 are respectively provided with powder leakage holes 2-53; the upper powder leaking plate 2-51 and the lower powder leaking plate 2-52 are overlapped with each other; the staggered positions of the powder leakage holes 2-53 on the upper powder leakage plate 2-51 and the lower powder leakage plate 2-52 are moved in parallel to form a variable pore space for controlling the closing degree of the powder outlet of the powder bin.
The shapes of the powder leakage holes 2-53 of the upper powder leakage plates 2-51 are different from the shapes of the powder leakage holes 2-53 of the lower powder leakage plates 2-52.
The powder leakage holes 2-53 of the upper powder leakage plate 2-51 are triangular, and the powder leakage holes 2-53 of the lower powder leakage plate 2-52 are rectangular.
The powder feeding channels 2-4 are obliquely arranged plate-shaped structures or rectangular pipeline structures.
A strip-shaped notch 4-1 is formed in the longitudinal sliding table 4 in the forming chamber;
the strip-shaped notch 4-1 of the longitudinal sliding table 4 moves to the position below the powder feeding channel 2-4, and powder slides into the strip-shaped notch 4-1 through the powder channel and is fed onto the powder laying platform 1; a powder spreading brush 4-2 is arranged on the longitudinal sliding table 4; when the longitudinal sliding table 4 moves, the powder is leveled or trimmed by the powder laying brush 4-2.
Compared with the prior art, the invention has the following advantages and effects:
1. the first powder feeding mechanism 2 comprises the following components in sequence from top to bottom: the powder weighing and proportioning device comprises a first powder storage bin 2-1, a powder weighing and proportioning bin 2-2, a rotary powder outlet bin 2-3 and a powder feeding channel 2-4; the first powder storage bin 2-1 is internally provided with a plurality of powder bins for containing powder of different materials; each powder outlet of the powder bin is provided with an independent powder leakage plate 2-5; the powder leakage plates 2-5 are used for opening or closing the opening degree of the corresponding powder outlet of the powder bin; a powder weighing proportioning bin 2-2 for weighing the powder from the first powder storage bin 2-1; the bottom of the powder weighing and proportioning bin 2-2 is provided with a powder discharge valve 2-6; the rotary powder outlet bin 2-3 is used for receiving the powder which is obtained by proportioning and mixing from the powder weighing and proportioning bin 2-2; the rotary powder outlet bin 2-3 comprises: a rotating shaft 2-7 and a shaft sleeve 2-8; the rotating shaft 2-7 is positioned in the inner shaft sleeve 2-8 and can rotate relative to the shaft sleeve 2-8; a plurality of powder collecting grooves 2-11 for containing powder are distributed on the circumferential surface of the rotating shaft 2-7; an upper gap 2-9 for receiving powder is arranged on the upper end surface of the shaft sleeve 2-8 and at a position 2-6 corresponding to the powder discharge valve of the powder weighing proportioning bin 2-2; a lower notch 2-10 for discharging powder is arranged on the lower end surface of the shaft sleeve 2-8; when powder is collected, the powder collecting grooves 2-11 rotate to the upper notches 2-9, after the powder is discharged into the powder collecting grooves 2-11, the rotating shafts 2-7 rotate, the powder is conveyed to the lower notches 2-10, and then the powder is conveyed to the powder laying platform 1 through the powder conveying channels 2-4. By adopting the structure, in the printing operation, the quantitative proportioning of the powder and the mixing operation are integrated into a flow, so that the proportioning accuracy is improved, the proportioning time is shortened, and the defects of complex proportioning, time consumption and the like in the traditional method are overcome;
the invention rotates the powder outlet bin 2-3, adopt the rotation axis 2-7 and shaft sleeve 2-8 to cooperate each other; the rotary shafts 2 to 7 are provided with the powder collecting grooves 2 to 11, so that quantitative conveying of powder made of multiple materials by one rotary shaft is realized, and the rotary powder conveying device has the advantages of simple structure, good mechanical stability, accurate discharging and the like.
2. The powder leakage plate 2-5 of the first powder storage bin 2-1 comprises an upper powder leakage plate 2-51 and a lower powder leakage plate 2-52 which can move horizontally; the upper powder leakage plate 2-51 and the lower powder leakage plate 2-52 are respectively provided with powder leakage holes 2-53; the upper powder leaking plate 2-51 and the lower powder leaking plate 2-52 are overlapped with each other; parallelly moving the staggered positions of the powder leakage holes 2-53 on the upper powder leakage plate 2-51 and the lower powder leakage plate 2-52 to form variable pores for controlling the closeness of the powder outlet of the powder bin; the powder leakage holes 2-53 of the upper powder leakage plate 2-51 are triangular, and the powder leakage holes 2-53 of the lower powder leakage plate 2-52 are rectangular. The powder leakage mode is simple in structure and good in operability, and can accurately control the powder output and achieve fine micro-control.
3. The second powder storage bin 3-1 is internally divided into a plurality of storage grids 3-3 for containing powder of different materials, and the tail part of the powder discharge nozzle 3-2 is provided with a plurality of independent powder channels 3-4; an independent powder leakage valve 3-5 is respectively arranged at the outlet of each powder channel 3-4; the powder outlet of each storage grid 3-3 is correspondingly connected to a powder channel 3-4 at the tail part of the powder leakage nozzle 3-2 through an independent pipeline 3-6. The powder leakage nozzle 3-2 is connected to one side of a longitudinal sliding table 4 in the forming chamber through a mounting frame 3-7; when in printing operation, the selected or switched powder enters the powder leakage nozzle 3-2 through the pipeline 3-6 corresponding to the storage grid 3-3 and is sent to the powder laying platform 1 through the powder leakage nozzle 3-2. The mounting rack 3-7 is arranged on a slide rail 3-9 of the longitudinal sliding table 4 through a slide block 3-8; the longitudinal sliding table 4 is connected to the transverse sliding table 5; the sliding blocks 3-8 linearly move along the sliding rails 3-9 of the longitudinal sliding table 4, the longitudinal sliding table 4 linearly moves along the length direction of the transverse sliding table 5, and then the powder leakage nozzles 3-2 are driven to complete translation in the direction of X, Y, so that powder (fixed points) made of different materials is leaked into a selected area of the powder laying platform 1, and a powder layer containing multiple powder materials is formed; by adopting the quantification and aiming at the powder leakage mode of the selected area, the same section of the workpiece contains different materials so as to meet the application requirement of the workpiece.
In conclusion, the powder feeding device comprises multi-material weighing and proportioning, so that two or more than two powder materials can be quantitatively and accurately supplied according to the required weight ratio all the time, and the powder proportion in each powder laying layer is controllable; multi-material fixed-point conveying can be realized; the specified material is accurately conveyed to the preset position of the forming surface, and the gradient change of the material composition in different directions in the powder layer can be ensured each time. According to the powder feeding device, two independent powder feeding mechanisms are organically integrated, so that both powder laying and powder feeding of powder made of different materials in a fixed point and fixed area can be realized, the utilization rate of the powder and the applicability of multiple materials are greatly improved, and a brand-new technical scheme for combining powder laying and powder leakage of the multiple materials is provided for the technical field of 3D printing.
Drawings
FIG. 1 is a schematic structural diagram of a powder feeding device for selective laser melting of a digital material.
Fig. 2 is a schematic structural view of the first powder feeding mechanism 2 according to the present invention.
FIG. 3 is a schematic perspective view of a part of the second powder storage bin 3-1 and the powder discharge nozzle 3-2 of the second powder feeding mechanism 3 according to the present invention.
Fig. 4 is a schematic view of the same powder layer on the forming plane and the distribution of multiple materials on the forming plane.
FIG. 5 is a schematic structural view of a powder leakage plate 2-5 of the first powder storage bin 2-1 according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
As shown in fig. 1-5.
The invention discloses a powder feeding device for forming a laser selective melting digital material, which comprises a laser device 7 and a forming cylinder lifting mechanism 6;
the powder feeding device is positioned above a powder laying platform 1 in a forming chamber of a selective laser melting printer; the powder feeding device comprises a first powder feeding mechanism 2 and a second powder feeding mechanism 3;
first powder feeding mechanism 2, including top-down sets gradually: the powder weighing and proportioning device comprises a first powder storage bin 2-1, a powder weighing and proportioning bin 2-2, a rotary powder outlet bin 2-3 and a powder feeding channel 2-4;
the first powder storage bin 2-1 is internally provided with a plurality of powder bins for containing powder of different materials; each powder outlet of the powder bin is provided with an independent powder leakage plate 2-5; the powder leakage plates 2-5 are used for opening or closing the opening degree of the corresponding powder outlet of the powder bin;
the powder weighing proportioning bin 2-2 is used for weighing the powder from the first powder storage bin 2-1; the bottom of the powder weighing and proportioning bin 2-2 is provided with a powder discharge valve 2-6;
the rotary powder outlet bin 2-3 is used for receiving the powder which is subjected to proportioning and mixing from the powder weighing and proportioning bin 2-2;
and the powder feeding channel 2-4 is connected to a powder discharging valve 2-6 of the powder weighing and proportioning bin 2-2 and used for conveying the powder after proportioning and mixing to the powder spreading platform 1.
The rotary powder outlet bin 2-3 of the first powder feeding mechanism 2 comprises: a rotating shaft 2-7 and a shaft sleeve 2-8;
the rotating shaft 2-7 is positioned in the inner shaft sleeve 2-8 and can rotate relative to the shaft sleeve 2-8;
a plurality of powder collecting grooves 2-11 for containing powder are distributed on the circumferential surface of the rotating shaft 2-7; an upper gap 2-9 for receiving powder is arranged on the upper end surface of the shaft sleeve 2-8 and at a position 2-6 corresponding to the powder discharge valve of the powder weighing proportioning bin 2-2; a lower notch 2-10 for discharging powder is arranged on the lower end surface of the shaft sleeve 2-8;
when powder is collected, the powder collecting grooves 2-11 rotate to the upper notches 2-9, after the powder is discharged into the powder collecting grooves 2-11, the rotating shafts 2-7 rotate, the powder is conveyed to the lower notches 2-10, and then the powder is conveyed to the powder laying platform 1 through the powder conveying channels 2-4.
The second powder feeding mechanism 3 comprises a second powder storage bin 3-1 and a powder leaking nozzle 3-2;
the second powder storage bin 3-1 is internally provided with a plurality of storage grids 3-3 for containing powder made of different materials,
the tail part of the powder leakage nozzle 3-2 is provided with a plurality of independent powder channels 3-4; an independent powder leakage valve 3-5 is respectively arranged at the outlet of each powder channel 3-4;
the powder outlet of each storage grid 3-3 of the second powder storage bin 3-1 is correspondingly connected to a powder channel 3-4 at the tail part of the powder leakage nozzle 3-2 through an independent pipeline 3-6. The pipelines 3-6 are flexible pipelines, such as silica gel.
The powder leaking nozzle 3-2 is connected to one side of the longitudinal sliding table 4 in the forming chamber through a mounting frame 3-7; when in printing operation, the selected or switched powder enters the powder leakage nozzle 3-2 through the pipeline 3-6 corresponding to the storage grid 3-3 and is sent to the powder laying platform 1 through the powder leakage nozzle 3-2.
The mounting rack 3-7 is mounted on a slide rail 3-9 of the longitudinal sliding table 4 through a slide block 3-8; the longitudinal sliding table 4 is connected to the transverse sliding table 5;
the sliding block 3-8 linearly moves along the sliding rail 3-9 of the longitudinal sliding table 4, the longitudinal sliding table 4 linearly moves along the length direction of the transverse sliding table 5, and then the powder leakage nozzle 3-2 is driven to complete translation in the direction of X, Y, so that powder (fixed point) made of different materials is leaked into a selected area of the powder laying platform 1; as shown in fig. 4, the selected areas are the same powder layer and have different materials of powder, and A, B, C in fig. 4 indicates different materials of powder. As can be seen from the schematic plan view of FIG. 4, the powders with different materials are in different areas on the same plane.
The powder leakage plate 2-5 of the first powder storage bin 2-1 comprises an upper powder leakage plate 2-51 and a lower powder leakage plate 2-52 which can translate with each other;
the upper powder leakage plate 2-51 and the lower powder leakage plate 2-52 are respectively provided with powder leakage holes 2-53; the upper powder leaking plate 2-51 and the lower powder leaking plate 2-52 are overlapped with each other; the staggered positions of the powder leakage holes 2-53 on the upper powder leakage plate 2-51 and the lower powder leakage plate 2-52 are moved in parallel to form a variable pore space for controlling the closing degree of the powder outlet of the powder bin.
The shapes of the powder leakage holes 2-53 of the upper powder leakage plates 2-51 are different from the shapes of the powder leakage holes 2-53 of the lower powder leakage plates 2-52.
The powder leakage holes 2-53 of the upper powder leakage plate 2-51 are triangular, and the powder leakage holes 2-53 of the lower powder leakage plate 2-52 are rectangular. Of course, other shapes may be used, depending on the particular requirements.
The powder feeding channels 2-4 are obliquely arranged plate-shaped structures or rectangular pipeline structures. When a plate-like structure is employed, the powder is transported from the surface of the plate-like structure; when a rectangular pipe structure is adopted, the powder is conveyed from the inside of the rectangular pipe.
A strip-shaped notch 4-1 is formed in the longitudinal sliding table 4 in the forming chamber;
the strip-shaped notch 4-1 of the longitudinal sliding table 4 moves to the position below the powder feeding channel 2-4, and powder slides into the strip-shaped notch 4-1 through the powder channel and is fed onto the powder laying platform 1; a powder spreading brush 4-2 is arranged on the longitudinal sliding table 4; when the longitudinal sliding table 4 moves, the powder is leveled or trimmed by the powder laying brush 4-2.
As described above, the present invention can be preferably realized.
The embodiments of the present invention are not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and they are included in the scope of the present invention.
Claims (10)
1. A powder feeding device for selective laser melting and digital material forming is positioned above a powder laying platform (1) in a selective laser melting printer forming chamber; the powder feeding device is characterized by comprising a first powder feeding mechanism (2) and a second powder feeding mechanism (3);
first powder feeding mechanism (2) includes that top-down sets gradually: a first powder storage bin (2-1), a powder weighing and proportioning bin (2-2), a rotary powder outlet bin (2-3) and a powder feeding channel (2-4);
the first powder storage bin (2-1) is internally provided with a plurality of powder bins for containing powder of different materials; each powder outlet of the powder bin is provided with an independent powder leakage plate (2-5); the powder leakage plates (2-5) are used for opening or closing the opening degree of the corresponding powder outlet of the powder bin;
the powder weighing proportioning bin (2-2) is used for weighing the powder from the first powder storage bin (2-1); the bottom of the powder weighing and proportioning bin (2-2) is provided with a powder discharge valve (2-6);
the rotary powder outlet bin (2-3) is used for receiving the powder which is obtained from the powder weighing and proportioning bin (2-2) after proportioning and mixing are finished;
and the powder feeding channel (2-4) is connected to a powder discharging valve (2-6) of the powder weighing and proportioning bin (2-2) and used for conveying the powder subjected to proportioning and mixing to the powder spreading platform (1).
2. The powder feeding device for selective laser melting digitalized material forming according to claim 1, wherein the rotary powder outlet bin (2-3) of the first powder feeding mechanism (2) comprises: a rotating shaft (2-7) and a shaft sleeve (2-8);
the rotating shaft (2-7) is positioned in the inner shaft sleeve (2-8) and can rotate relative to the shaft sleeve (2-8);
a plurality of powder collecting grooves (2-11) for containing powder are distributed on the circumferential surface of the rotating shaft (2-7); an upper notch (2-9) for receiving powder is arranged on the upper end surface of the shaft sleeve (2-8) and at the position corresponding to the powder discharge valve (2-6) of the powder weighing and proportioning bin (2-2); a lower notch (2-10) for discharging powder is arranged on the lower end surface of the shaft sleeve (2-8);
when powder is collected, the powder collecting grooves (2-11) rotate to the upper notches (2-9), after the powder is discharged into the powder collecting grooves (2-11), the rotating shafts (2-7) rotate, the powder is conveyed to the lower notches (2-10), and the powder is conveyed to the powder laying platform (1) through the powder conveying channels (2-4).
3. The powder feeding device for the selective laser melting digital material forming according to claim 2, wherein the second powder feeding mechanism (3) comprises a second powder storage bin (3-1) and a powder leaking nozzle (3-2);
the second powder storage bin (3-1) is internally divided into a plurality of storage grids (3-3) for containing powder made of different materials,
the tail part of the powder leakage nozzle (3-2) is provided with a plurality of independent powder channels (3-4); an independent powder leakage valve (3-5) is respectively arranged at the outlet of each powder channel (3-4);
the powder outlet of each storage grid (3-3) of the second powder storage bin (3-1) is correspondingly connected to a powder channel (3-4) at the tail part of the powder leakage nozzle (3-2) through an independent pipeline (3-6).
4. The powder feeding device for selective laser melting and digital material forming of claim 3, wherein the powder leaking nozzle (3-2) is connected to one side of the longitudinal sliding table (4) in the forming chamber through a mounting frame (3-7); when in printing operation, the selected or switched powder enters the powder leakage nozzle (3-2) through the pipeline (3-6) corresponding to the storage grid (3-3) and is sent to the powder laying platform (1) through the powder leakage nozzle (3-2).
5. The powder feeding device for selective laser melting and digital material forming of claim 4, wherein the mounting rack (3-7) is mounted on a slide rail (3-9) of the longitudinal sliding table (4) through a slide block (3-8); the longitudinal sliding table (4) is connected to the transverse sliding table (5);
the sliding blocks (3-8) linearly move along the sliding rails (3-9) of the longitudinal sliding table (4), the longitudinal sliding table (4) linearly moves along the length direction of the transverse sliding table (5), and then the powder leaking nozzle (3-2) is driven to complete translation in the direction X, Y, and powder is leaked into the selected area of the powder laying platform (1).
6. The powder feeder for digital material forming by selective laser melting according to claim 2, wherein the powder leakage plate (2-5) of the first powder storage bin (2-1) comprises an upper powder leakage plate (2-51) and a lower powder leakage plate (2-52) which can translate with each other;
the upper powder leakage plate (2-51) and the lower powder leakage plate (2-52) are respectively provided with powder leakage holes (2-53); the upper powder leaking plate (2-51) and the lower powder leaking plate (2-52) are overlapped with each other; the staggered positions of the powder leakage holes (2-53) on the upper powder leakage plate (2-51) and the lower powder leakage plate (2-52) are moved in parallel to form a variable pore space for controlling the closing degree of the powder outlet of the powder bin.
7. The powder feeding device for the selective laser melting digital material molding according to claim 6, wherein the shape of the powder leaking hole (2-53) of the upper powder leaking plate (2-51) is different from the shape of the powder leaking hole (2-53) of the lower powder leaking plate (2-52).
8. The powder feeding device for the selective laser melting digitalized material forming of claim 7, wherein the powder leaking holes (2-53) of the upper powder leaking plate (2-51) are triangular in shape, and the powder leaking holes (2-53) of the lower powder leaking plate (2-52) are rectangular in shape.
9. The powder feeding device for the selective laser melting digital material forming of the claim 8 is characterized in that the powder feeding channel (2-4) is a plate-shaped structure which is arranged obliquely.
10. The powder feeding device for selective laser melting and digital material molding according to claim 9, wherein a longitudinal sliding table (4) in the molding chamber is provided with a strip-shaped notch (4-1);
the strip-shaped notch (4-1) of the longitudinal sliding table (4) moves to the position below the powder feeding channel (2-4), and powder slides into the strip-shaped notch (4-1) through the powder channel and is fed onto the powder laying platform (1); a powder spreading brush (4-2) is arranged on the longitudinal sliding table (4); when the longitudinal sliding table (4) moves, the powder is leveled by the powder spreading brush (4-2).
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| CN202111502680.3A CN114346265A (en) | 2021-12-09 | 2021-12-09 | Powder feeding device for selective laser melting and digital material forming |
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| CN202111502680.3A CN114346265A (en) | 2021-12-09 | 2021-12-09 | Powder feeding device for selective laser melting and digital material forming |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114801175A (en) * | 2022-05-13 | 2022-07-29 | 马鞍山嘉兰智造科技有限公司 | Many materials feeding system of 3d printer |
| CN114986893A (en) * | 2022-06-27 | 2022-09-02 | 共享智能装备有限公司 | Powder paving device and 3D printing equipment |
| CN115415553A (en) * | 2022-09-16 | 2022-12-02 | 北京科技大学 | Three-dimensional multi-material gradient powder layer laying device and method |
| CN115430847A (en) * | 2022-09-27 | 2022-12-06 | 华中科技大学 | Device for spreading powder on multiple materials in same slicing layer in any form |
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2021
- 2021-12-09 CN CN202111502680.3A patent/CN114346265A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114801175A (en) * | 2022-05-13 | 2022-07-29 | 马鞍山嘉兰智造科技有限公司 | Many materials feeding system of 3d printer |
| CN114801175B (en) * | 2022-05-13 | 2023-11-24 | 马鞍山嘉兰智造科技有限公司 | Multi-material feeding system of 3d printer |
| CN114986893A (en) * | 2022-06-27 | 2022-09-02 | 共享智能装备有限公司 | Powder paving device and 3D printing equipment |
| CN114986893B (en) * | 2022-06-27 | 2023-05-30 | 共享智能装备有限公司 | Shop's powder device and 3D printing apparatus |
| CN115415553A (en) * | 2022-09-16 | 2022-12-02 | 北京科技大学 | Three-dimensional multi-material gradient powder layer laying device and method |
| CN115430847A (en) * | 2022-09-27 | 2022-12-06 | 华中科技大学 | Device for spreading powder on multiple materials in same slicing layer in any form |
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