CN110920071A - Continuous constant volume and quantitative feeding device for powder materials - Google Patents
Continuous constant volume and quantitative feeding device for powder materials Download PDFInfo
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- CN110920071A CN110920071A CN201811024538.0A CN201811024538A CN110920071A CN 110920071 A CN110920071 A CN 110920071A CN 201811024538 A CN201811024538 A CN 201811024538A CN 110920071 A CN110920071 A CN 110920071A
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- 239000000843 powder Substances 0.000 title claims abstract description 142
- 239000000463 material Substances 0.000 title claims abstract description 39
- 230000001360 synchronised effect Effects 0.000 claims abstract description 39
- 238000004140 cleaning Methods 0.000 claims abstract description 28
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 11
- 238000010146 3D printing Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 239000002699 waste material Substances 0.000 description 7
- 238000005245 sintering Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 235000003642 hunger Nutrition 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 230000037351 starvation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006052 feed supplement Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000110 selective laser sintering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Classifications
-
- 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
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/321—Feeding
-
- 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
- B29C64/30—Auxiliary operations or equipment
- B29C64/35—Cleaning
-
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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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)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention relates to a continuous quantitative constant volume feeding device for powder materials, which comprises a vacuum feeding machine, a storage box, a feeding level sensor, a discharging level sensor, a sealing cavity, a powder conveying device, a multi-stage powder cleaning device and a linking platform, wherein the vacuum feeding machine is fixed above the storage box, the storage box is fixed above the sealing cavity, the powder conveying device and the multi-stage powder cleaning device are accommodated in the sealing cavity, the feeding level sensor and the discharging level sensor are fixed on the side wall of the storage box, the powder conveying device comprises a driving motor, a driving synchronous pulley, a driven synchronous pulley and a conveying belt, the driving motor is connected with the driving synchronous pulley through a synchronous belt, the conveying belt comprises a positive toothed belt and a reverse toothed belt which are integrally formed, the positive toothed belt is sleeved on the driving synchronous pulley and the driven synchronous pulley, and the convex surface of the reverse toothed belt is tangent to the side wall of the storage box, the powder in the storage box falls into the groove of the reverse toothed belt, and the sealing cavity is communicated with the link platform through the blanking port.
Description
Technical Field
The invention belongs to the technical field of 3D printing, and relates to a continuous constant-volume quantitative feeding device for powder materials.
Background
The powder bed laser selective sintering 3D printing is that a laser beam is controlled to scan a powder plane according to a pattern, after the scanning is finished, a powder spreading roller spreads a layer of powder material on the upper surface of a formed part and heats the powder material to a certain temperature just lower than a sintering point of the powder, and a control system controls the laser beam to scan the powder according to a section pattern of the layer, so that the temperature of the powder is raised to the melting point, the powder is sintered, and the powder is bonded with a formed part below the powder. And after the sintering of the section of one layer is finished, the workbench descends by the thickness of one layer, the material spreading roller spreads a layer of uniform and dense powder on the powder bed, and the sintering of the section of a new layer is carried out until the 3D printing of the whole model is finished.
The whole process of the powder bed selective laser sintering 3D printing needs a powder supply device for dosing. Firstly, in the whole printing process, each layer is printed, the forming cylinder is lowered by one layer thickness, powder of the layer needs to be supplied when the next layer is printed, the lowering height is generally determined according to the layer thickness, under the condition that the area of the forming cylinder is fixed, the layer thickness determines the required powder supply amount, and the powder needs to be quantitatively supplied according to the difference of the layer thickness. Second, when the laser scans the previous layer, the powder scanned by the laser will melt, and the melted area will be lower than the powder plane. The larger the scanning area is, the more powder is needed under the same area of the forming cylinder, and the powder supply amount of the powder needs to be quantitatively increased according to the scanning area.
The existing quantitative powder supply device supplies powder quantitatively through the movement distance of a lead screw of a powder supply cylinder, continuous printing cannot be realized by the mode, and the quantitative powder supply device needs to be stopped for feeding when the powder supply cylinder does not supply materials and then continues to print.
The powder feeding device is characterized in that a powder laying trolley with a through connection is arranged in the middle of the powder laying trolley to feed powder quantitatively, a certain amount of powder is stored in the trolley, the lower edge of the trolley is in contact with a powder plane, the powder plane is lowered by a certain height, and the powder plane is supplemented with the powder in the moving process of the trolley. The areas scanned by the laser consume more powder and feeding in this manner may result in powder starvation in areas that are frequently scanned by the laser and powder starvation in areas that are not scanned by the laser.
Also, the powder is dosed by means of a toothed feeder, which causes a high minimum quantity to be dosed and which is liable to cause bridging phenomena, leading to powder clogging.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the continuous constant-volume quantitative feeding device for the powder materials, which can continuously feed materials in the 3D printing process without interruption, can supply materials according to the actual required quantity, can accurately feed the materials, avoids the conditions of insufficient feeding or waste feeding, saves time and labor, saves resources and reduces waste.
The invention is realized by the following steps:
a continuous constant volume quantitative feeding device for powder materials comprises a vacuum feeding machine, a storage box, a feeding level sensor, a discharging level sensor, a sealed cavity, a powder conveying device, a multi-level powder cleaning device and a linking platform, wherein the vacuum feeding machine is fixed above the storage box, the storage box is fixed above the sealed cavity, the storage box is communicated with the sealed cavity, the powder conveying device and the multi-level powder cleaning device are contained in the sealed cavity, the feeding level sensor and the discharging level sensor are fixed on the side wall of the storage box, the feeding level sensor is positioned above the discharging level sensor, the powder conveying device comprises a driving motor, a driving synchronous belt wheel, a driven synchronous belt wheel and a conveying belt, the driving motor is connected with the driving synchronous belt wheel through the synchronous belt, the conveying belt comprises a positive toothed belt and a negative toothed belt, a groove on the first side of the positive toothed belt and a groove on the first side of the negative toothed belt are oppositely fixed, the second side of the positive toothed belt is sleeved on the driving synchronous belt wheel and the driven synchronous belt wheel, the convex surface of the second side of the reverse toothed belt is tangent to the side wall of the storage box, the powder in the storage box falls into the groove of the second side of the reverse toothed belt, sealed chamber through the blanking mouth with it is linked together to link the platform, passive synchronous pulley's vertical tangent plane is located directly over the blanking mouth, along with the conveying of conveyer belt, the powder falls into in the blanking mouth, fix on the sealed chamber bottom plate multistage powder cleaning device with the recess of the second side of reverse use toothed belt contacts for remaining powder in the clearance recess.
Preferably, the angle of the driving motor is controlled to control the volume of the falling powder, and the specific method comprises the following steps: the PLC sends a pulse number to control an output shaft of the driving motor to rotate, the pulse number M required to be output by conveying powder of 1 groove is equal to A/0.18 degrees, wherein M is an integer, and A is an included angle formed between two side edges of an adjacent groove and convex surface on the reverse toothed belt and the circle center of the passive synchronous belt.
Preferably, the spur toothed belt and the counter toothed belt are integrally formed.
Preferably, the powder conveying device further comprises a plurality of riding wheels, and the riding wheels are fixed between the driving synchronous pulley and the driven synchronous pulley and connected with the second side of the positive toothed belt.
Preferably, the volume of the grooves of the reverse toothed belt is V0 of the conveyed powder, the required amount is V1, the supplied amount is V2, and then V1 is not less than V2 and not more than V0N is not more than V1+ V0, wherein N is a positive integer.
Preferably, the multi-stage powder cleaning device is a plurality of bristles.
Preferably, the number of said bristles is at least 2.
Compared with the prior art, the invention has the following beneficial effects:
(1) the continuous constant-volume quantitative feeding device for the powder materials is simple in structure, continuous feeding is carried out in the 3D printing process, the feeding is not interrupted, the powder materials can be supplied according to actual required material quantity, accurate feeding can be achieved, the condition of insufficient feeding or feeding waste is avoided, time and labor are saved, resources are saved, and waste is reduced.
(2) The cross section of the storage box is not changed, the shrinkage force of the materials on the powder in the direction of flowing to the discharge opening is not changed, the powder in each part in the storage box flows vertically downwards, the horizontal normal stress is smaller than the vertical normal stress, the bridging phenomenon is avoided, and the powder blockage is avoided.
(3) The lower edge of the storage box is tangent to the convex surface of the reverse toothed belt, and the powder direction of the storage box is fixed and cannot flow in the opposite direction.
(4) The positive tooth-shaped belt and the reverse tooth-shaped belt are integrated into a whole, the structure is simple, the phenomenon that the reverse tooth-shaped belt is staggered is avoided, the positive tooth-shaped belt can ensure that a conveying belt does not slip, and the groove of the reverse tooth-shaped belt is used as a feeding container, so that quantitative feeding can be realized, and the precision of conveying powder is improved.
(5) The invention can realize the closed conveying of the powder, the whole feeding device has good sealing performance, and the sealing performance of the processing cavity can be ensured after the feeding device is connected with the processing cavity through the linking plane.
(6) The multi-stage powder cleaning device is arranged on the bottom plate of the sealed cavity and can also be arranged at any position needing cleaning, and powder remained in the groove on the second side of the reverse toothed belt wheel of the multi-stage powder cleaning device is cleaned along with the transmission of the driving motor. On one hand, the aim of cleaning products is achieved, and on the other hand, the precision of constant-volume quantitative conveying of powder is improved.
Drawings
FIG. 1 is a schematic structural diagram of a continuous constant-volume quantitative feeding device for powder materials according to the present invention;
FIG. 2 is a front view of the continuous constant volume quantitative feeding device of the powder type material of the present invention;
FIG. 3 is an enlarged view of I of FIG. 1;
fig. 4 is an enlarged view of II in fig. 1.
Detailed Description
Exemplary embodiments, features and performance aspects of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
As shown in fig. 1 and 2, a continuous constant volume quantitative feeding device for powder materials comprises a vacuum feeding machine 1, a storage box 2, a feeding level sensor 3, a discharging level sensor 4, a sealed cavity 5, a powder conveying device, a multi-level powder cleaning device 67 and a linking platform 8, wherein the vacuum feeding machine 1 is fixed above the storage box 2, the storage box 2 is fixed above the sealed cavity 5, the storage box 2 is communicated with the sealed cavity 5, the powder conveying device is accommodated in the sealed cavity 5, the feeding level sensor 3 and the discharging level sensor 4 are fixed on the side wall of the storage box 2, the feeding level sensor 3 is positioned above the discharging level sensor 4, when the feeding level sensor 3 and the discharging level sensor 4 sense that no material exists in the storage box 2 at the same time, automatic material supplement is carried out by the vacuum feeding machine 1, when the feeding level sensor 3 and the discharging level sensor 4 sense that there is material in the storage box 2 at the same time, the vacuum feeder 1 stops working.
The powder conveying device comprises a driving motor 61, a driving synchronous pulley 62, a driven synchronous pulley 63 and a conveying belt 65, wherein the driving motor 61 is connected with the driving synchronous pulley 62 through a synchronous belt 64, the conveying belt 65 comprises a positive toothed belt 651 and a negative toothed belt 652, as shown in fig. 3 and 4, a groove on a first side of the positive toothed belt 651 and a groove on a first side of the negative toothed belt 652 are relatively fixed, a second side of the positive toothed belt 651 is sleeved on the driving synchronous pulley 62 and the driven synchronous pulley 63, a convex surface of a second side of the negative toothed belt 652 (namely a convex surface close to the storage box 2) is tangent to a side wall of the storage box 2, powder in the storage box 2 falls into the groove on the second side of the negative toothed belt 652, the sealed cavity 5 is communicated with the linking platform 8 through a blanking port 7, a vertical tangent plane of the driven synchronous pulley 63 is positioned right above the blanking port 7, and is conveyed along with the conveying belt 65, the powder falls into the drop opening 7.
The multistage powder cleaning device 67 fixed to the bottom plate of the sealed chamber 5 is in contact with the groove of the second side of the reversed toothed belt 652 for cleaning the residual powder in the groove.
Preferably, the powder cleaning devices 67 are bristles, the number of the powder cleaning devices is at least 2, the bottom ends of the rod portions of the bristles are fixed on the bottom plate of the sealed cavity 5, the bristle portions of the bristles are in contact with the grooves in the second side of the reverse toothed belt 652, the grooves in the second side of the reverse toothed belt 652 are sequentially connected with the bristles through the driving of the driving motor 61, the bristles clean a small amount of powder remaining in the grooves, and clean the powder remaining in the grooves at any time. On one hand, the aim of cleaning products is achieved, and on the other hand, the precision of constant-volume quantitative conveying of powder is improved. The powder cleaning device 67 is installed at the bottom plate of the sealed cavity 5, is flexible in installation position, can be installed at any position needing cleaning, and can perform cleaning work by the self movement of the powder conveying device without an external power element.
The feeding device can control the volume of falling powder by controlling the angle of the driving motor, and the specific method comprises the following steps: the PLC sends a pulse number to control an output shaft of the driving motor to rotate, the subdivision of a motor driver is 2000, that is, 2000 pulses are needed for one rotation of the motor, the rotation angle of one pulse control motor is 0.18 degrees, so that the number of pulses M needed to be output for conveying powder of 1 groove is equal to A/0.18 degrees, wherein M is an integer after rounding, and A is an included angle formed by two side edges of one adjacent groove and one convex surface on the reverse toothed belt and the circle center of the passive synchronous belt.
In this embodiment, as shown in fig. 4, a is 17.63 °, the number of pulses M required to be output for conveying the powder of one groove is 17.63 °/0.18 ° -98 °.
Preferably, the positive cog belt 651 and the negative cog belt 652 are integrally formed, so that the phenomenon of dislocation of the negative cog belt is avoided, the positive cog belt can ensure that the conveying belt does not slip, and the grooves of the negative cog belt are used as a feeding container, so that quantitative feeding can be realized, and the precision of conveying powder is improved.
Preferably, the powder conveying apparatus further includes a plurality of idlers 66, and the idlers 66 are fixed between the driving timing pulley 62 and the driven timing pulley 63 and are connected to the second side of the positive timing belt 651, so that the problem of long distance conveyance of the powder can be solved.
In the present invention, the volume of the groove of the inverted toothed belt is the volume V of the transported powder0The required amount is V1The feed amount isV2Then V is1≤V2＝V0*N≤V1+V0Wherein N is a positive integer.
In the in-service use, vacuum feeding machine 1 carries out the feed storage for storage case 2, when material level sensor 3 and lower level sensor 4 sense storage case 2 simultaneously and do not have the material in, carries out automatic feed supplement through vacuum feeding machine 1, when material level sensor 3 and lower level sensor 4 sense storage case 2 simultaneously and have the material in, vacuum feeding machine 1 stop work. In the 3D printing process, the driving motor 61 drives the driving synchronous belt pulley 62 to rotate through the synchronous belt 64, the driving synchronous belt pulley 62 drives the driven synchronous belt pulley 63 to synchronously rotate through the positive toothed belt 651 of the conveying belt, the convex surface of the reverse toothed belt 652 is tangent to the side wall of the storage box 2, the powder of the storage box 2 falls into the groove of the reverse toothed belt 652 and is used for storing the groove, the powder advances along with the movement of the conveying belt, when the powder moves to the vertical tangent plane of the driven synchronous belt pulley 63, under the action of gravity, the powder falls into the blanking port 7 and is fed, and the circulation is carried out, so that the continuous feeding can be realized, and meanwhile, the material waste is avoided. The volume of the falling powder can be controlled by controlling the angle of the drive motor. The volume of the grooves of the inverted toothed belt is the volume V of the conveyed powder0The required amount is V1The feed amount is V2Then V is1≤V2＝V0*N≤V1+V0And N is a positive integer, so that constant volume and quantitative supply of the powder material is realized.
In conclusion, the invention has the following advantages:
the continuous constant-volume quantitative feeding device for the powder materials is simple in structure, continuous feeding is carried out in the 3D printing process, the feeding is not interrupted, the powder materials can be supplied according to actual required material quantity, accurate feeding can be achieved, the condition of insufficient feeding or feeding waste is avoided, time and labor are saved, resources are saved, and waste is reduced. The sectional area of the storage box is not changed, the bridging phenomenon is avoided, and powder blockage is avoided. The lower edge of the storage box is tangent to the convex surface of the reverse toothed belt, and the powder direction of the storage box is fixed and cannot flow in the opposite direction. The positive tooth-shaped belt and the negative tooth-shaped belt are connected to be used as an integral conveying belt, the structure is simple, the positive tooth-shaped belt can ensure that the conveying belt does not slip, and the groove of the negative tooth-shaped belt is used as a container for feeding, so that quantitative feeding can be realized. The invention can realize the closed conveying of the powder, the whole feeding device has good sealing performance, and the sealing performance of the processing cavity can be ensured after the feeding device is connected with the processing cavity through the linking plane. And the multistage powder cleaning device is arranged on the bottom plate of the sealed cavity and can also be arranged at any position needing cleaning, and the powder remained in the groove on the second side of the reverse toothed belt wheel of the multistage powder cleaning device is cleaned along with the transmission of the driving motor. On one hand, the aim of cleaning products is achieved, and on the other hand, the precision of constant-volume quantitative conveying of powder is improved.
Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a continuous constant volume ration feedway of powder class material which characterized in that: which comprises a vacuum feeding machine, a storage box, a feeding level sensor, a discharging level sensor, a sealing cavity, a powder conveying device, a multi-stage powder cleaning device and a linking platform,
the vacuum feeding machine is fixed above the storage box, the storage box is fixed above the sealed cavity and communicated with the sealed cavity, the powder conveying device and the multistage powder cleaning device are accommodated in the sealed cavity, the feeding level sensor and the discharging level sensor are fixed on the side wall of the storage box and positioned above the discharging level sensor,
the powder conveying device comprises a driving motor, a driving synchronous belt pulley, a driven synchronous belt pulley and a conveying belt, wherein the driving motor is connected with the driving synchronous belt pulley through a synchronous belt, the conveying belt comprises a positive toothed belt and a negative toothed belt, a groove on the first side of the positive toothed belt and a groove on the first side of the negative toothed belt are relatively fixed, a second side sleeve of the positive toothed belt is sleeved on the driving synchronous belt pulley and the driven synchronous belt pulley, a convex surface on the second side of the negative toothed belt is tangent to a side wall of the storage box, powder in the storage box falls into the groove on the second side of the negative toothed belt, a sealing cavity is communicated with the connecting platform through a blanking port, a vertical tangent plane of the driven synchronous belt pulley is positioned directly above the blanking port, and powder falls into the blanking port along with conveying of the conveying belt,
the multistage powder cleaning device fixed on the bottom plate of the sealed cavity is in contact with the groove on the second side of the reverse toothed belt and used for cleaning powder remained in the groove.
2. The continuous constant-volume quantitative feeding device of the powder material according to claim 1, characterized in that: the method is characterized in that the volume of falling powder is controlled by controlling the angle of a driving motor, and the specific method comprises the following steps: the PLC sends a pulse number to control an output shaft of the driving motor to rotate, the pulse number M required to be output by conveying powder of 1 groove is equal to A/0.18 degrees, wherein M is an integer, and A is an included angle formed between two side edges of an adjacent groove and convex surface on the reverse toothed belt and the circle center of the passive synchronous belt.
3. The continuous constant-volume quantitative feeding device of the powder material according to claim 1, characterized in that: the positive cog belt and the negative cog belt are integrally formed.
4. The continuous constant-volume quantitative feeding device of the powder material according to claim 1, characterized in that: the powder conveying device further comprises a plurality of supporting wheels, and the supporting wheels are fixed between the driving synchronous belt wheel and the driven synchronous belt wheel and connected with the second side of the positive toothed belt.
5. The continuous constant-volume quantitative feeding device of the powder material according to claim 1, characterized in that: the volume of the groove of the reverse toothed belt is the volume V of the conveyed powder0The required amount is V1The feed amount is V2Then V is1≤V2＝V0*N≤V1+V0Wherein N is a positive integer.
6. The continuous quantitative constant-volume feeding device for powder materials according to claim 1, characterized in that: the multi-stage powder cleaning device is a plurality of bristles.
7. The continuous quantitative constant-volume feeding device for powder materials according to claim 6, characterized in that: the number of said bristles is at least 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811024538.0A CN110920071A (en) | 2018-09-04 | 2018-09-04 | Continuous constant volume and quantitative feeding device for powder materials |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811024538.0A CN110920071A (en) | 2018-09-04 | 2018-09-04 | Continuous constant volume and quantitative feeding device for powder materials |
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| Publication Number | Publication Date |
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| CN110920071A true CN110920071A (en) | 2020-03-27 |
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| CN201811024538.0A Pending CN110920071A (en) | 2018-09-04 | 2018-09-04 | Continuous constant volume and quantitative feeding device for powder materials |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113828802A (en) * | 2021-10-18 | 2021-12-24 | 南通理工学院 | Flexible metal powder spreading device for additive manufacturing |
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| JP2007145549A (en) * | 2005-11-29 | 2007-06-14 | Chugoku Electric Power Co Inc:The | Belt feeder |
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| CN113828802A (en) * | 2021-10-18 | 2021-12-24 | 南通理工学院 | Flexible metal powder spreading device for additive manufacturing |
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