CN113967539A - High-quality iron-based 3D prints preparation system of powder - Google Patents
High-quality iron-based 3D prints preparation system of powder Download PDFInfo
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- CN113967539A CN113967539A CN202111231055.XA CN202111231055A CN113967539A CN 113967539 A CN113967539 A CN 113967539A CN 202111231055 A CN202111231055 A CN 202111231055A CN 113967539 A CN113967539 A CN 113967539A
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- collecting groove
- rotating rod
- screen
- material collecting
- metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C7/00—Separating solids from solids by electrostatic effect
- B03C7/02—Separators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
Abstract
The invention provides a preparation system of high-quality iron-based powder for 3D printing, which comprises the following steps: edulcoration device and have the shale shaker of feed inlet and discharge gate, wherein: the impurity removing device comprises a rotating rod with static electricity, a driving mechanism for driving the rotating rod to rotate and a material collecting groove for collecting materials; the rotary rod is positioned below the discharge port of the vibrating screen and is in a horizontal state; the material collecting groove comprises a metal particle material collecting groove, a neutral particle material collecting groove and a nonmetal particle material collecting groove, wherein the metal particle material collecting groove, the neutral particle material collecting groove and the nonmetal particle material collecting groove are all located below the rotating rod and are arranged in parallel in sequence along the rotating direction of the rotating rod. The invention not only realizes the impurity removal work with the same order of magnitude as the diameter of the metal powder, but also realizes the classified collection of metal particles, neutral particles and non-metal particles, and is beneficial to the recycling of resources.
Description
Technical Field
The invention relates to the technical field of metal powder preparation, in particular to a preparation system of high-quality iron-based powder for 3D printing.
Background
Most of metal particles used in 3D printing at present are prepared by adopting an inert gas vacuum atomization process, metal raw materials are smelted in an oxide crucible in the preparation process, the problem that impurities are mixed in metal powder due to the fact that nonmetal in the crucible falls off is inevitable in the smelting process, and the impurities with the diameter of the metal powder in the same order of magnitude are difficult to remove in the traditional mechanical screening process. The selective laser melting and laser deposition for 3D printing are rapid quenching forming processes, the solidification speed of the processes is high, the molten pool area formed by laser or electron beams is small, and impurities mixed in metal powder are difficult to be discharged out of the molten pool like the traditional processes such as casting. Therefore, if metal powder mixed with impurities is introduced into powder used for 3D printing, minute defects inside the printed matter are easily formed.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a preparation system of high-quality iron-based powder for 3D printing.
The invention provides a preparation system of high-quality iron-based powder for 3D printing, which comprises the following components: edulcoration device and have the shale shaker of feed inlet and discharge gate, wherein:
the impurity removing device comprises a rotating rod with static electricity, a driving mechanism for driving the rotating rod to rotate and a material collecting groove for collecting materials;
the rotary rod is positioned below the discharge port of the vibrating screen and is in a horizontal state;
the material collecting groove comprises a metal particle material collecting groove, a neutral particle material collecting groove and a nonmetal particle material collecting groove, wherein the metal particle material collecting groove, the neutral particle material collecting groove and the nonmetal particle material collecting groove are all located below the rotating rod and are arranged in parallel in sequence along the rotating direction of the rotating rod.
Preferably, one side of the rotating stick is provided with a vibrating plate capable of generating vibration, the vibrating plate is arc-shaped and coaxial with the rotating stick, and a space is reserved between the vibrating plate and the rotating stick; the metal particle collecting groove is positioned below the lowest end of the vibrating plate.
Preferably, one side of the rotating rod, which is far away from the vibrating plate, is provided with a scraping brush which is in contact with the rotating rod, and the non-metal particle collecting groove is positioned below the scraping brush.
Preferably, the vibrating screen comprises an upper screen and a lower screen with screen holes, the upper screen and the lower screen are arranged up and down, the screen holes of the upper screen are larger than the screen holes of the lower screen, the upper screen is arranged horizontally, the lower screen is arranged obliquely, and the lowest end of the lower screen is elastically connected with the lower edge of the discharge port of the vibrating screen.
Preferably, the lowest end of the lower screen mesh is connected with the lower edge of the discharge port of the vibrating screen through an elastic connecting sheet.
Preferably, a material guiding component is arranged at a discharge port of the vibrating screen, the material guiding component is provided with a material guiding channel butted with the discharge port, the material guiding channel is in an inclined state, and the lowest end of the material guiding channel is positioned above the rotating rod.
Preferably, the surface of the lowest end of the material guiding channel where the port is located is an inclined surface, and the inclination direction of the surface of the lowest end of the material guiding channel is opposite to the inclination direction of the material guiding channel.
Preferably, the impurity removing device also comprises a shell, the top of the shell is provided with a feed inlet, and the rotating stick is positioned in the shell and horizontally arranged below the feed inlet of the shell; the shell is internally positioned below the rotary rod and is partitioned to form a metal particle collecting groove, a neutral particle collecting groove and a nonmetal particle collecting groove.
Preferably, the bottom of the shell is provided with a first discharge port communicated with the metal particle collecting groove, a second discharge port communicated with the neutral particle collecting groove and a third collecting groove communicated with the non-metal particle collecting groove.
Preferably, the device also comprises a sorting device with a feeding port and a discharging port, and the feeding port of the vibrating screen is connected with the discharging port of the sorting device.
Preferably, the sorting device comprises a plurality of sorters, all of which are connected in series to form a multi-stage sort.
In the invention, the powder is screened by the vibrating screen to obtain the powder with the particle diameter of the same order of magnitude. Because the metal particles in the powder cannot be adsorbed by static electricity, the impurities in the powder mainly comprise nonmetal particles made of pure nonmetal materials and neutral particles containing metal and nonmetal, and the mass difference of the metal particles, the neutral particles and the nonmetal particles is larger under the condition of the same particle size. Therefore, when powder with the particle diameter of the same order of magnitude falls onto the rotating roller, neutral particles and non-metal particles in the powder are adsorbed under the action of electrostatic adsorption and friction force, and the metal particles are supported only by the rotating roller. And along with the rotation of the rotating rod, metal particles, neutral particles and non-metal particles in the powder are gradually thrown away by the rotating rod under the action of the rotating centrifugal force and the self gravity, and the throwing running tracks of the three materials can generate obvious difference, namely: the metal particles with the largest mass are firstly thrown out by the rotating rod, the neutral particles with the mass between the metal particles and the nonmetal particles are thrown out after the metal particles are thrown out and then a section of the rotating rod is followed, and the nonmetal particles with the smallest mass are finally thrown out. The thrown metal particles are collected by the metal particle collecting groove in a centralized manner, the thrown neutral particles are collected by the neutral particle collecting groove in a centralized manner, and the thrown impurities are collected by the nonmetal particle collecting groove in a centralized manner. The structure realizes the impurity removal work with the diameter of the metal powder in the same order of magnitude, improves the purity of the metal particles, realizes the classified collection of the metal particles, the neutral particles and the non-metal particles, and is favorable for the recycling of resources.
Drawings
Fig. 1 is a schematic structural diagram of a high-quality iron-based powder preparation system for 3D printing according to the present invention.
Fig. 2 is a schematic diagram of the result of the impurity removing device in the high-quality iron-based 3D printing powder preparation system provided by the invention.
Fig. 3 is a schematic structural diagram of the vibrating screen in the preparation system of the high-quality iron-based 3D printing powder provided by the invention.
Detailed Description
Referring to fig. 1-3, the invention provides a high-quality iron-based 3D printing powder preparation system, which includes: edulcoration device and shale shaker 1 that has feed inlet and discharge gate, wherein:
the impurity removing device comprises a rotating rod 2 with static electricity, a driving mechanism for driving the rotating rod 2 to rotate and a material collecting groove for collecting materials. The rotary rod 2 is positioned below the discharge hole of the vibrating screen 1 and is in a horizontal state. The material collecting groove comprises a metal particle material collecting groove 3, a neutral particle material collecting groove 4 and a nonmetal particle material collecting groove 5, wherein the metal particle material collecting groove 3, the neutral particle material collecting groove 4 and the nonmetal particle material collecting groove 5 are all located below the rotating rod 2 and arranged in parallel in sequence along the rotating direction of the rotating rod 2. The specific working mode is as follows:
the metal powder mixed with impurities is screened by a vibrating screen 1 in advance to obtain powder with the particle diameter of the same order of magnitude. Then a driving mechanism is used for driving the rotating rod 2 with static electricity to rotate from the metal particle collecting groove 3 to the non-metal particle collecting groove 3, so that impurities with the particle diameter of the same order of magnitude in the metal powder are removed.
The specific working principle is as follows:
the impurities in the powder mainly comprise pure non-metallic particles and neutral particles containing metal and non-metal, and the mass difference of the metal particles, the neutral particles and the non-metallic particles is larger under the condition of the same particle size.
Therefore, along with the rotation of the rotating rod 2, the metal particles, the neutral particles and the non-metal particles are gradually thrown away by the rotating rod 2 under the action of the rotating centrifugal force and the self gravity, and the throwing running tracks of the three particles can generate obvious difference, namely: the metal particles with the largest mass are firstly thrown out by the rotating rod 2, the neutral particles with the mass between the metal particles and the nonmetal particles are thrown out after the metal particles are thrown out and then can follow the rotating rod 2 for a section, and the nonmetal particles with the smallest mass are finally thrown out. And metal particle collecting groove 3 is arranged at the foremost end of the rotation direction of rotating rod 2, non-metal particle collecting groove 5 is arranged at the rearmost end of the rotation direction of rotating rod 2, neutral particle collecting groove 4 is located between metal particle collecting groove 3 and non-metal particle collecting groove 5, so that metal powder thrown out first automatically falls into metal particle collecting groove 3, neutral powder automatically falls into neutral particle collecting groove 4, and non-metal powder automatically falls into non-metal particle collecting groove 5. The impurity removal work with the same order of magnitude as the diameter of the metal powder is realized, and the classified collection of the metal particles, the neutral particles and the nonmetal particles is realized, so that the recycling of resources is facilitated.
Specifically, in the present invention, the non-metallic particles and the neutral particles are specifically formed for the following reasons:
because metal raw materials are smelted in an oxide crucible in the preparation process of metal powder, fine nonmetal particles on the crucible are dropped and introduced into final metal particles to form nonmetal particles in the smelting process, and meanwhile, in the smelting process, neutral particles which contain metal and nonmetal are formed by fusion of oxide materials of the crucible and metal liquid.
From the above, the present invention screens the powder material through the vibrating screen 1 to obtain the powder material with the same order of magnitude of particle diameter. Because the metal particles in the powder are not adsorbed by static electricity, but the impurities (including non-metal particles and neutral particles) in the powder can be adsorbed by static electricity. Therefore, when powder having a particle diameter of the same order of magnitude falls onto the rotating roller 2, the non-metal particles and the neutral particles are adsorbed by electrostatic adsorption and friction force, and the metal particles are supported only by the rotating roller 2. With the rotation of the rotating rod 2, the metal particles are directly thrown out, and the neutral particles and the non-metal particles are gradually thrown out by the rotating rod 2 under the action of the rotating centrifugal force and the self gravity. Because the mass difference of the metal particles, the neutral particles and the nonmetal particles is larger under the condition that the particle diameters of the metal particles, the neutral particles and the nonmetal particles are approximately the same, the running tracks thrown by the metal particles, the neutral particles and the nonmetal particles can generate obvious difference in the rotating process of the rotating rod 2. The thrown metal particles are collected by the metal particle collecting trough 3, the thrown neutral particles are collected by the neutral particle collecting trough 4, and the thrown impurities are collected by the non-metal particle collecting trough 5.
In addition, in the embodiment, a vibrating plate 6 capable of generating vibration is arranged on one side of the rotating stick 2, the vibrating plate 6 is arc-shaped and coaxial with the rotating stick 2, and a gap is reserved between the vibrating plate 6 and the rotating stick 2; the metal particle collecting groove 3 is positioned below the lowest end of the vibrating plate 6. When the metal powder is thrown out, the metal powder falls on the vibrating plate 6 in advance, the agglomerated powder is vibrated and dispersed by the vibration of the vibrating plate 6, and then neutral particles and non-metal particles which are carried out by the agglomerated metal powder can be adsorbed on the rotating rod 2 again after being vibrated and dispersed, and the metal powder continues to move forward along with the rotating rod 2 until being thrown out. The metal powder falls into the metal particle collecting tank 3 with the vibration of the vibrating plate 6. The arrangement of the vibrating plate 6 can effectively solve the problem of incomplete impurity removal caused by belt wrapping.
Specifically, the method comprises the following steps: the vibration plate 6 includes a vibrator and a plate body that generates vibration by the vibrator providing a vibration source.
In addition, since the adsorption force of the non-metal particles on the rotary rod 2 is often large, there may be a problem that the non-metal particles cannot be completely separated from the rotary rod 2. Therefore, in the present embodiment, the scraping brush 7 is provided on the side of the rotary rod 2 away from the vibrating plate 6, and the rotary rod 2 is cleaned on the side of the rotary rod 2 where the scraping brush 7 is rotated.
In this embodiment, the vibrating screen 1 includes an upper screen 101 and a lower screen 102 having screen holes, the upper screen 101 and the lower screen 102 are disposed up and down, the screen holes of the upper screen 101 are larger than the screen holes of the lower screen 102, the upper screen 101 is disposed horizontally, the lower screen 102 is disposed obliquely, and the lowest end of the lower screen 102 is elastically connected to the lower edge of the discharge hole of the vibrating screen 1. The upper screen 101 is used for screening out particles with large particle size, and the lower screen 102 is used for screening out particles with small particle size, so that the particle sizes of powder particles entering the impurity removal device tend to be the same. Thereby improving the impurity removal effect.
Specifically, the method comprises the following steps: the lowest end of the lower screen 102 is connected with the lower edge of the discharge hole of the vibrating screen 1 through an elastic connecting sheet 9.
In this embodiment, a material guiding component 8 is disposed at the discharge port of the vibrating screen 1, the material guiding component 8 has a material guiding channel butted with the discharge port, the material guiding channel is in an inclined state, and the lowest end of the material guiding channel is located above the rotating rod 2. The material guiding part 8 can lead the powder to fall on the rotating roller 2 at a certain inclination angle, and can reduce the impact force of the powder falling on the rotating roller 2.
Specifically, the method comprises the following steps: the surface of the port at the lowest end of the material guide channel is an inclined surface, and the inclined direction of the surface of the port is opposite to the inclined direction of the material guide channel, so that smooth material discharge is ensured, and the impact force of the powder and the rotating rod 2 is further relieved.
In the embodiment, the impurity removing device further comprises a shell 10, a feeding hole is formed in the top of the shell 10, and the rotating rod 2 is located in the shell 10 and horizontally arranged below the feeding hole of the shell 10; the shell 10 is arranged below the rotary rod 2 and is partitioned to form a metal particle collecting groove 3, a neutral particle collecting groove 4 and a nonmetal particle collecting groove 5. Specifically, the method comprises the following steps: the bottom of casing 10 is equipped with the first discharge gate that feeds through with metal particle collecting tank 3, the second discharge gate that feeds through with neutral particle collecting tank 4 and the third collecting tank that feeds through with non-metal particle collecting tank 5.
In this embodiment, the multi-stage separator further comprises a sorting device with a feeding port and a discharging port, the sorting device comprises a plurality of sorters 11, and all the sorters 11 are connected in sequence to form multi-stage sorting. The feed inlet of the vibrating screen 1 is connected with the discharge outlet of the sorting device.
In this embodiment, the rotary rod 2 is connected to an electrostatic generator to generate static electricity by the electrostatic generator.
Specifically, the method comprises the following steps: the rotating rod 2 comprises a roller body and a carbon brush slip ring arranged at the end part of the roller body, and the electrostatic generator is connected with the carbon brush slip ring.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a preparation system of high quality iron-based 3D printing powder which characterized in that includes: edulcoration device and shale shaker (1) that have feed inlet and discharge gate, wherein:
the impurity removing device comprises a rotating rod (2) with static electricity, a driving mechanism for driving the rotating rod (2) to rotate and a material collecting groove for collecting materials;
the rotary rod (2) is positioned below the discharge hole of the vibrating screen (1) and is in a horizontal state;
the material collecting groove comprises a metal particle material collecting groove (3), a neutral particle material collecting groove (4) and a nonmetal particle material collecting groove (5), wherein the metal particle material collecting groove (3), the neutral particle material collecting groove (4) and the nonmetal particle material collecting groove (5) are all located below the rotating rod (2) and are arranged in parallel in sequence along the rotating direction of the rotating rod (2).
2. The system for preparing the high-quality iron-based powder for 3D printing according to claim 1, wherein a vibrating plate (6) capable of generating vibration is arranged on one side of the rotating rod (2), the vibrating plate (6) is arc-shaped and coaxial with the rotating rod (2), and a gap is reserved between the vibrating plate (6) and the rotating rod (2); the metal particle collecting groove (3) is positioned below the lowest end of the vibrating plate (6).
3. The system for preparing the high-quality iron-based powder for 3D printing according to claim 2, wherein a scraping brush (7) in contact with the rotating rod (2) is arranged on one side of the rotating rod (2) far away from the vibrating plate (6), and the non-metal particle collecting groove (5) is positioned below the scraping brush (7).
4. The system for preparing the high-quality iron-based powder for 3D printing according to claim 1, wherein the vibrating screen (1) comprises an upper screen (101) and a lower screen (102) with screen holes, the upper screen (101) and the lower screen (102) are arranged up and down, the screen holes of the upper screen (101) are larger than those of the lower screen (102), the upper screen (101) is arranged horizontally, the lower screen (102) is arranged obliquely, and the lowest end of the lower screen (102) is elastically connected with the lower edge of the discharge hole of the vibrating screen (1).
5. The system for preparing the high-quality iron-based powder for 3D printing according to claim 4, wherein the lowest end of the screen (102) is connected with the lower edge of the discharge hole of the vibrating screen (1) through an elastic connecting sheet (9).
6. The system for preparing the high-quality iron-based powder for 3D printing according to claim 1, wherein a material guiding component (8) is arranged at a discharge port of the vibrating screen (1), the material guiding component (8) is provided with a material guiding channel butted with the discharge port, the material guiding channel is in an inclined state, and the lowest end of the material guiding channel is positioned above the rotating rod (2).
7. The system according to claim 6, wherein the surface of the lowest port of the material guiding channel is an inclined surface, and the inclined direction of the surface of the lowest port is opposite to the inclined direction of the material guiding channel.
8. The preparation system of high-quality iron-based powder for 3D printing according to claim 1, wherein the impurity removing device further comprises a shell (10), a feed inlet is formed in the top of the shell (10), and the rotating rod (2) is positioned in the shell (10) and horizontally arranged below the feed inlet of the shell (10); the shell (10) is arranged inside and below the rotary rod (2) and is partitioned to form a metal particle collecting groove (3), a neutral particle collecting groove (4) and a nonmetal particle collecting groove (5).
9. The system for preparing the high-quality iron-based powder for 3D printing according to claim 8, wherein the bottom of the shell (10) is provided with a first discharge port communicated with the metallic particle collecting tank (3), a second discharge port communicated with the neutral particle collecting tank (4), and a third collecting tank communicated with the non-metallic particle collecting tank (5).
10. The system for preparing the high-quality iron-based powder for 3D printing according to any one of claims 1-9, further comprising a sorting device with a feeding port and a discharging port, wherein the feeding port of the vibrating screen (1) is connected with the discharging port of the sorting device;
preferably, the sorting device comprises a plurality of sorters (11), all sorters (11) being connected in series to form a multi-stage sort.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111231055.XA CN113967539A (en) | 2021-10-22 | 2021-10-22 | High-quality iron-based 3D prints preparation system of powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111231055.XA CN113967539A (en) | 2021-10-22 | 2021-10-22 | High-quality iron-based 3D prints preparation system of powder |
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| CN113967539A true CN113967539A (en) | 2022-01-25 |
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| CN202111231055.XA Pending CN113967539A (en) | 2021-10-22 | 2021-10-22 | High-quality iron-based 3D prints preparation system of powder |
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| US4226703A (en) * | 1978-08-11 | 1980-10-07 | Imperial Group Limited | Electro-static tobacco separator |
| JPS63209764A (en) * | 1987-02-25 | 1988-08-31 | Ishikawajima Harima Heavy Ind Co Ltd | Electrostatic classificating method |
| JP2002370048A (en) * | 2001-06-15 | 2002-12-24 | Hitachi Zosen Corp | Heat shrinking equipment for separating plastics |
| CN1454119A (en) * | 2000-09-04 | 2003-11-05 | 日立造船株式会社 | Apparatus for separating plastic chips |
| CN1654129A (en) * | 2005-02-03 | 2005-08-17 | 上海交通大学 | High tension electrostatic separating apparatus and method for worn-out broken printed circuit board granules |
| JP2011183448A (en) * | 2010-03-11 | 2011-09-22 | Kiyota Chuki:Kk | Horizontal drum type old sand recovering device |
| CN104907255A (en) * | 2015-06-18 | 2015-09-16 | 浙江亚通焊材有限公司 | Device and technology for preparing powder used for high-quality iron-based 3D printing |
| CN210753225U (en) * | 2019-05-28 | 2020-06-16 | 江苏绿能塑木科技有限公司 | Screening and discharging device for preparing plastic-wood particle powder |
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2021
- 2021-10-22 CN CN202111231055.XA patent/CN113967539A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4226703A (en) * | 1978-08-11 | 1980-10-07 | Imperial Group Limited | Electro-static tobacco separator |
| JPS63209764A (en) * | 1987-02-25 | 1988-08-31 | Ishikawajima Harima Heavy Ind Co Ltd | Electrostatic classificating method |
| CN1454119A (en) * | 2000-09-04 | 2003-11-05 | 日立造船株式会社 | Apparatus for separating plastic chips |
| JP2002370048A (en) * | 2001-06-15 | 2002-12-24 | Hitachi Zosen Corp | Heat shrinking equipment for separating plastics |
| CN1654129A (en) * | 2005-02-03 | 2005-08-17 | 上海交通大学 | High tension electrostatic separating apparatus and method for worn-out broken printed circuit board granules |
| JP2011183448A (en) * | 2010-03-11 | 2011-09-22 | Kiyota Chuki:Kk | Horizontal drum type old sand recovering device |
| CN104907255A (en) * | 2015-06-18 | 2015-09-16 | 浙江亚通焊材有限公司 | Device and technology for preparing powder used for high-quality iron-based 3D printing |
| CN210753225U (en) * | 2019-05-28 | 2020-06-16 | 江苏绿能塑木科技有限公司 | Screening and discharging device for preparing plastic-wood particle powder |
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Address after: 310000 No. 372, Jinpeng street, Sandun Industrial Park, Xihu District, Hangzhou City, Zhejiang Province Applicant after: Zhejiang Yatong New Materials Co.,Ltd. Address before: 310000 No. 372, Jinpeng street, Sandun Industrial Park, Xihu District, Hangzhou City, Zhejiang Province Applicant before: ZHEJIANG ASIA GENERAL SOLDERING & BRAZING MATERIAL Co.,Ltd. |