CN110625941B - Primary screening and powder collecting device for 3D intelligent manufacturing - Google Patents

Primary screening and powder collecting device for 3D intelligent manufacturing Download PDF

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Publication number
CN110625941B
CN110625941B CN201911045365.5A CN201911045365A CN110625941B CN 110625941 B CN110625941 B CN 110625941B CN 201911045365 A CN201911045365 A CN 201911045365A CN 110625941 B CN110625941 B CN 110625941B
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inner cylinder
bin
powder collecting
printing
forming bin
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CN110625941A (en
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钱波
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Xuzhou Bochuang Construction Development Group Co ltd
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Su Normal University Semiconductor Materials and Equipment Research Institute Pizhou Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/141—Processes of additive manufacturing using only solid materials
    • B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
    • 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
    • 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
    • B29C64/357—Recycling
    • 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

Abstract

The invention relates to a primary screening and powder collecting device for 3D intelligent manufacturing, which introduces an external multilayer sleeve structure aiming at a forming bin (1) structure and is accompanied with the rotation of a designed internal cylinder (6) relative to the forming bin (1), the sealing state or the hollow state of the circumference of the side wall of the molding bin (1) is realized through the dislocation or butt joint of the first hollow structure on the side wall of the internal cylinder (6) and the first hollow structure (8) on the side wall of the molding bin (1), therefore, the powder materials can be stacked layer by layer in the 3D printing operation based on the closed state of the forming bin (1), and the primary screening and collection of powder in the molding bin (1) after the 3D printing operation is finished are realized based on the hollow state of the molding bin (1), and the powder is placed in a designed external powder collecting container (5), so avoided the manual work to the cleaning action in shaping storehouse (1), can effectively improve the work efficiency that whole 3D printed.

Description

Primary screening and powder collecting device for 3D intelligent manufacturing
Technical Field
The invention relates to a primary screening and powder collecting device for 3D intelligent manufacturing, and belongs to the technical field of 3D intelligent manufacturing.
Background
3D printing, namely a technology of constructing an object by using adhesive materials such as powdered metal or plastic and the like and by a layer-by-layer printing mode, namely additive manufacturing, is a technology which is based on a digital model file and applies adhesive materials such as powdered metal or plastic and the like to construct the object, the existing 3D printing devices are various, wherein the industrial application is more based on a sealed bin and combined with the structure application of a forming bin, namely, powder with the height is paved in the forming bin when a base plate in the forming bin descends to the preset height, laser is then applied to selectively sinter the paved powder to obtain a product structure in the layer of powder, the powder is overlapped layer by layer, and then selective sintering is carried out layer by layer to finally obtain a 3D printing product, but when the existing device finishes the 3D printing operation, the whole product is still positioned in the forming bin, and the powder is also filled in the forming bin at the moment, namely, the 3D printing product is submerged in the powder at the moment, in the prior art, a worker is required to manually take out a product and clean powder attached to the product, the method is complicated, and excessive damage to the powder is easily caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a primary screening and powder collecting device for 3D intelligent manufacturing, aiming at a forming bin structure, an external multilayer sleeve structure is introduced, under the condition of realizing relative rotation with the forming bin, a hollow structure is applied, primary screening and collection are carried out on powder in the forming bin, and the working efficiency of integral 3D printing can be effectively improved.
The invention adopts the following technical scheme for solving the technical problems: the invention designs a primary screening and powder collecting device for 3D intelligent manufacturing, which is used for carrying out primary screening and powder collecting operation on powder in a forming bin after 3D printing operation is finished; the forming bin is positioned below the 3D printing sealing bin, an open opening at the top of the forming bin is vertically and upwards fixedly butted with a through hole with the same caliber as that of the bottom of the 3D printing sealing bin, an electric control lifting mechanism is fixedly arranged on the bottom surface in the forming bin, the lifting end of the electric control lifting mechanism is vertically and upwards butted with the lower surface of a base plate, the base plate is in a horizontal posture, the outer diameter of the base plate is matched with the inner diameter of the section of the forming bin, and the base plate moves along with the up-and-down movement of the lifting end of the electric control lifting mechanism;
the primary screening powder collecting device comprises an external powder collecting container, an internal cylinder and a rotating motor; the forming bin is cylindrical, and a first hollow structure is arranged on the forming bin corresponding to the side wall of the area above the lowest position of the substrate in a circle; the inner cylinder is of a cylindrical barrel structure with only an open top surface, the inner diameter of the section of the inner cylinder is matched with the outer diameter of the section of the forming bin, the inner height of the inner cylinder is larger than the height of the forming bin, the inner cylinder is vertically upwards in a posture with an open top surface, and is detachably sleeved on the periphery of the forming bin from the position right below the forming bin, the inner wall of the inner cylinder is in contact with the outer wall of the forming bin, and the inner cylinder and the forming bin rotate coaxially relative to each other; based on the mutual positions of the contact state of the edge of the open top surface of the inner cylinder and the lower surface of the bottom of the 3D printing sealed cabin, the area, corresponding to the first hollow structure arranged on the forming cabin, on the side wall of the inner cylinder is provided with the first hollow structure which is the same as the first hollow structure on the side wall of the forming cabin; along with the rotation of the inner cylinder relative to the forming bin, the closed state or the hollowed state of one circle of the side wall of the forming bin is realized through the dislocation or butt joint of the first hollowed structure on the side wall of the inner cylinder and the first hollowed structure on the side wall of the forming bin;
the external powder collecting container is of a cylindrical barrel structure with only an open top surface, the inner diameter of the open top surface of the external powder collecting container is larger than the outer diameter of the section of the internal cylinder, and the external powder collecting container and the internal cylinder are different by a preset distance difference; the outer powder collecting container is movably sleeved on the periphery of the inner cylinder from the right lower part of the inner cylinder in a vertical upward posture with an open top surface, a central shaft of the outer powder collecting container is collinear with a central shaft of the inner cylinder, a motor of a rotating motor is fixedly arranged at the central position of the inner bottom surface of the outer powder collecting container, the end part of a rotating rod of the rotating motor is vertically and upwardly fixedly butted with the central position of the outer bottom surface of the inner cylinder, and the inner cylinder rotates by taking the central shaft as the shaft along with the rotation of the rotating rod of the rotating motor; based on the contact state of the edge of the open top surface of the inner cylinder and the lower surface of the bottom of the 3D printing sealing bin, the edge of the open top surface of the outer powder collecting container is detachably butted with the lower surface of the bottom of the 3D printing sealing bin, and the positions of the outer powder collecting container and the 3D printing sealing bin are fixed; the control key of the rotating motor is externally connected with the outside of the external powder collecting container and is used for carrying out rotation control on the rotating motor.
As a preferred technical scheme of the invention: the powder collecting device also comprises a closed annular extension, the closed annular extension is of a plane structure, the inner diameter of the closed annular extension is matched with the outer diameter of an open opening on the top surface of the inner cylinder, the outer diameter of the closed annular extension is larger than the inner diameter of the closed annular extension, the difference value of the preset distance between the inner diameter of the open opening on the top surface of the outer powder collecting container and the outer diameter of the section of the inner cylinder is larger than the difference value of the outer diameter of the closed annular extension and the inner diameter of the closed annular extension, the inner circumference of the closed annular extension is fixedly butted to the outer circumference of the edge of the open opening on the top surface of the inner cylinder, and the surface of the closed annular extension is vertical to the central axis of the inner cylinder;
based on the contact state of the edge of the open top surface of the inner cylinder and the lower surface of the bottom of the 3D printing sealed cabin, the upper surface of the closed annular extension is in contact with the lower surface of the bottom of the 3D printing sealed cabin, and the closed annular extension rotates relative to the lower surface of the bottom of the 3D printing sealed cabin along with the rotation of the inner cylinder; the surface of the closed annular extension and the area, corresponding to the closed annular extension, at the bottom of the 3D printing sealing bin are respectively provided with second hollow structures with the same structures; based on the rotation of the closed annular epitaxy along with the inner cylinder, the closed state or the hollow state of the area of the second hollow structure on the bottom of the 3D printing sealed cabin is realized through the dislocation or butt joint of the second hollow structure on the surface of the closed annular epitaxy and the second hollow structure on the bottom of the 3D printing sealed cabin; and a circle of the side wall of the forming bin and an area of the second hollow structure on the bottom of the 3D printing sealing bin synchronously present a closed state or a hollow state.
As a preferred technical scheme of the invention: still including keeping off the feed cylinder, keep off feed cylinder both ends open, and link up each other, keep off the internal diameter of feed cylinder and rotate the motor on the external diameter of motor and suit, keep off feed cylinder and be located outside powder collection container and on the cover locates the periphery of rotating the motor on, keep off feed cylinder above-mentioned outside powder collection container terminal port edge a week of bottom surface, with outside powder collection container bottom surface fixed connection, keep presetting the clearance to the terminal port edge of inside drum outer bottom surface above the feed cylinder, with inside drum outer bottom surface.
Compared with the prior art, the primary screening and powder collecting device for 3D intelligent manufacturing has the following technical effects:
(1) according to the primary screening and powder collecting device for 3D intelligent manufacturing, an external multilayer sleeve structure is introduced aiming at a forming bin structure, along with the rotation of a designed internal cylinder relative to the forming bin, a closed state or a hollowed-out state of a circle of the side wall of the forming bin is realized through the dislocation or butt joint of a first hollowed-out structure on the side wall of the internal cylinder and a first hollowed-out structure on the side wall of the forming bin, so that the powder is stacked layer by layer in the 3D printing operation based on the closed state of the forming bin, and the primary screening and collection of the powder in the forming bin are carried out after the 3D printing operation is completed based on the hollowed-out state of the forming bin and are contained in a designed external powder collecting container, so that the cleaning effect of the forming bin by manpower is avoided, and the working efficiency of the whole 3D printing can be effectively improved;
(2) in the primary screening powder collecting device designed for 3D intelligent manufacturing, closed annular epitaxy is further designed and added for the periphery of the open top of the inner cylinder, based on the rotation of the closed annular epitaxy along with the inner cylinder, the closed state or the hollowed state of the area where the second hollowed structure is arranged on the surface of the closed annular epitaxy is staggered or butted with the second hollowed structure on the bottom of the 3D printing sealed cabin, so that after 3D printing operation is completed, in the process of controlling the gradual rising of the base plate in the forming cabin, the powder supported by the base plate and opened in the forming cabin can flow to the periphery of the open bottom forming cabin in the 3D printing sealed cabin, and can fall into an external powder collecting container through the hollowed state of the area arranged on the second hollowed structure on the bottom of the 3D printing sealed cabin, the powder collection is further realized, and the working efficiency of the powder collection is improved;
(3) the invention is designed for a primary screening powder collecting device for 3D intelligent manufacturing, and also designs the material blocking barrel sleeved on the periphery of the motor on the rotating motor, so that powder is collected by the external powder collecting container, powder is prevented from remaining in a crack at the position where the motor is arranged on the rotating motor, the collection is not facilitated, and the collection efficiency of the powder in the external powder collecting container is further improved.
Drawings
FIG. 1 is a schematic structural diagram of a primary screening and powder collecting device designed for 3D intelligent manufacturing according to the present invention.
The automatic powder collecting device comprises a forming bin 1, a 2.3D printing sealing bin bottom, an electronic control lifting mechanism 3, a base plate 4, an external powder collecting container 5, an internal cylinder 6, a rotating motor 7, a first hollow structure 8, a closed annular extension 9, a second hollow structure 10 and a material blocking barrel 11.
Detailed Description
The following description will explain embodiments of the present invention in further detail with reference to the accompanying drawings.
In the application of the forming bin 1 in the existing 3D printing system, as shown in fig. 1, the forming bin 1 is located below the 3D printing sealed bin, the top of the forming bin 1 is open, vertically and upwardly fixedly butted with a through hole with the same caliber as the through hole on the bottom 2 of the 3D printing sealed bin, an electric control lifting mechanism 3 is fixedly arranged on the inner bottom surface of the forming bin 1, the lifting end of the electric control lifting mechanism 3 is vertically and upwardly butted with the lower surface of a substrate 4, the substrate 4 is in a horizontal posture, the outer diameter of the substrate 4 is adapted to the inner diameter of the cross section of the forming bin 1, and the substrate 4 moves along with the up-down movement of the lifting end of the electric control lifting mechanism 3.
The invention designs a primary screening and powder collecting device for 3D intelligent manufacturing, which is used for carrying out primary screening and powder collecting operation on powder in a forming bin 1 after 3D printing operation is finished; as shown in fig. 1, the powder collecting device comprises an outer powder collecting container 5, an inner cylinder 6, a rotating motor 7, a closed annular extension 9 and a material blocking cylinder 11; the forming bin 1 is cylindrical, and a first hollow structure 8 is arranged on the forming bin 1 around the side wall corresponding to the area above the lowest position of the substrate 4; the inner cylinder 6 is a cylindrical barrel structure with only an open top surface, the inner diameter of the section of the inner cylinder 6 is adapted to the outer diameter of the section of the molding bin 1, the height of the inside of the inner cylinder 6 is greater than that of the molding bin 1, the inner cylinder 6 is movably sleeved on the periphery of the molding bin 1 in a manner that the top surface of the inner cylinder is open vertically and upwards, the inner wall of the inner cylinder 6 is in contact with the outer wall of the molding bin 1, and the inner cylinder 6 and the molding bin 1 rotate coaxially relative to each other; based on the mutual positions of the contact state of the edge of the open top surface of the inner cylinder 6 and the lower surface of the bottom 2 of the 3D printing sealed cabin, the area, corresponding to the first hollow structure 8 arranged on the forming cabin 1, on the side wall of the inner cylinder 6 is provided with the first hollow structure which is the same as the first hollow structure 8 arranged on the side wall of the forming cabin 1; along with the rotation of the relative shaping storehouse 1 of inside drum 6, through dislocation or the butt joint of first hollow out construction 8 on 6 lateral walls of inside drum and the 1 lateral wall of shaping storehouse, realize closed condition or the fretwork state to 1 lateral wall a week in shaping storehouse.
The external powder collecting container 5 is a cylindrical barrel structure with only an open top surface, the inner diameter of the open top surface of the external powder collecting container 5 is larger than the outer diameter of the section of the internal cylinder 6, and the two are different by a preset distance difference; the external powder collecting container 5 is movably sleeved on the periphery of the internal cylinder 6 from the position right below the internal cylinder 6 in a vertical upward posture with an open top surface, the central axis of the external powder collecting container 5 is collinear with the central axis of the internal cylinder 6, a motor of a rotating motor 7 is fixedly arranged at the central position of the inner bottom surface of the external powder collecting container 5, the end part of a rotating rod of the rotating motor 7 is vertically and upwardly fixedly butted with the central position of the outer bottom surface of the internal cylinder 6, and the internal cylinder 6 rotates by taking the central axis as the axis along with the rotation of the rotating rod of the rotating motor 7; based on the contact state of the open edge of the top surface of the inner cylinder 6 and the lower surface of the bottom 2 of the 3D printing sealed cabin, the open edge of the top surface of the outer powder collecting container 5 is detachably butted with the lower surface of the bottom 2 of the 3D printing sealed cabin, and the positions of the outer powder collecting container 5 and the 3D printing sealed cabin are fixed; the control key of the rotating motor 7 is externally connected with the outside of the external powder collecting container 5 and is used for controlling the rotation of the rotating motor 7.
The two ends of the material blocking barrel 11 are open and are communicated with each other, the inner diameter of the material blocking barrel 11 is matched with the outer diameter of a motor on the rotating motor 7, the material blocking barrel 11 is positioned in the outer powder collecting container 5 and is sleeved on the periphery of the motor on the rotating motor 7, the upper surface of the material blocking barrel 11 is surrounded by the port edge of the inner bottom surface of the outer powder collecting container 5 and is fixedly connected with the inner bottom surface of the outer powder collecting container 5, and the upper surface of the material blocking barrel 11 is kept at a preset gap with the port edge of the outer bottom surface of the inner cylinder 6 and the outer bottom surface of the inner cylinder 6; in practical application, when the powder is collected by the external powder collecting container 5, the situation that the powder is not beneficial to collection in a crack at the position where the motor is arranged on the powder residual rotating motor 7 is avoided, and the collection efficiency of the powder in the external powder collecting container 5 is further improved.
The closed annular extension 9 is of a plane structure, the inner diameter of the closed annular extension 9 is matched with the outer diameter of the open top of the inner cylinder 6, the outer diameter of the closed annular extension 9 is larger than the inner diameter of the closed annular extension, the difference value of the preset distance between the inner diameter of the open top of the outer powder collecting container 5 and the outer diameter of the cross section of the inner cylinder 6 is larger than the difference value of the outer diameter of the closed annular extension 9 and the inner diameter of the closed annular extension 9, the inner circumference of the closed annular extension 9 is fixedly butted on the periphery of the outer side of the open top of the inner cylinder 6, and the surface where the closed annular extension 9 is located is vertical to the central axis of the inner cylinder 6.
Based on the contact state of the edge of the open top surface of the inner cylinder 6 and the lower surface of the bottom 2 of the 3D printing sealed cabin, the upper surface of the closed annular extension 9 is in contact with the lower surface of the bottom 2 of the 3D printing sealed cabin, and the closed annular extension 9 rotates relative to the lower surface of the bottom 2 of the 3D printing sealed cabin along with the rotation of the inner cylinder 6; the surface of the closed annular extension 9 and the area, corresponding to the closed annular extension 9, of the bottom 2 of the 3D printing sealed cabin are respectively provided with second hollow structures 10 with the same structures; based on the rotation of the closed annular extension 9 along with the inner cylinder 6, the closed state or the hollow state of the area, where the second hollow structure 10 is arranged, on the bottom 2 of the 3D printing sealed cabin is realized through the dislocation or butt joint of the second hollow structure on the surface of the closed annular extension 9 and the second hollow structure 10 on the bottom 2 of the 3D printing sealed cabin; and a circle of the side wall of the forming bin 1 and an area of the second hollow structure 10 on the bottom 2 of the 3D printing sealing bin synchronously present a closed state or a hollow state; so after accomplishing 3D and printing the operation, the in-process that base plate 4 gradually rose in the control shaping storehouse 1 is held in the palm by base plate 4 in the powder that shaping storehouse 1 opened the mouth, can flow to 3D and print around the open mouth of bottom surface shaping storehouse 1 in the sealed storehouse, can print the fretwork state in the region that second hollow structure 10 was established on sealed storehouse bottom 2 through 3D, fall to outside collection powder container 5, further realized the powder and collected, improved the work efficiency that the powder was collected.
The prescreening powder collecting device for 3D intelligent manufacturing designed by the technical scheme is directed at a forming bin 1 structure, an external multilayer sleeve structure is introduced, the rotation of the designed internal cylinder 6 relative to the forming bin 1 is accompanied, dislocation or butt joint of the first hollow structures 8 on the side walls of the internal cylinder 6 and the forming bin 1 is realized, the closed state or the hollow state of the side wall of the forming bin 1 in a circle is realized, therefore, the closed state based on the forming bin 1 is realized, the powder is stacked layer by layer in the 3D printing operation, and the hollow state based on the forming bin 1 is realized after the 3D printing operation is completed, prescreening collection of the powder in the forming bin 1 is carried out and is contained in the designed external powder collecting container 5, the manual cleaning effect on the forming bin 1 is avoided, and the working efficiency of the whole 3D printing can be effectively improved.
The prescreening powder collecting device for 3D intelligent manufacturing is applied to practice, the prescreening powder collecting device consisting of an external powder collecting container 5, an internal cylinder 6, a rotating motor 7, a closed annular extension 9 and a material blocking cylinder 11 is sleeved on the periphery of a forming bin 1, namely, the open edge of the top surface of the external powder collecting container 5 is butted with the lower surface of the bottom 2 of a 3D printing sealing bin, the positions of the open edge and the lower surface are relatively fixed, the inner wall of the internal cylinder 6 is contacted with the outer wall of the forming bin 1, and the upper surface of the closed annular extension 9 is contacted with the lower surface of the bottom 2 of the 3D printing sealing bin; in the concrete application, the motor 7 is controlled to rotate to drive the inner cylinder 6 to rotate, so that the periphery of the side wall of the forming bin 1 and the area, arranged on the bottom 2 of the 3D printing sealing bin, of the second hollow structure 10 synchronously present a closed state, and at the moment, the 3D printing operation can be carried out.
After the 3D printing operation is finished, the rotating motor 7 is controlled to work again to drive the inner cylinder 6 to rotate, so that one circle of the side wall of the forming bin 1 and the area where the second hollow structure 10 is arranged on the bottom 2 of the 3D printing sealing bin are in a hollow state synchronously, one circle of the side wall of the forming bin 1 is hollow, and then powder in the forming bin 1 flows to the surrounding first hollow structures 8 and further falls into the external powder collecting container 5, and powder collection is achieved; in order to take out the 3D printed product, the substrate 4 in the molding bin 1 needs to be controlled to ascend, the 3D printed product is supported out of the molding bin 1, meanwhile, the powder in the molding bin 1 is also supported out of the opening of the molding bin 1, and at the moment, the powder supported out of the opening of the molding bin 1 flows to an area on the bottom 2 of the 3D printing sealing bin, where the second hollow structure 10 is arranged, and then falls into the external powder collecting container 5 through the second hollow structure 10, so that the powder in the molding bin 1 is collected through two ways; finally, the primary screening powder collecting device is taken down from the forming bin 1, and the collected powder can be poured out through the open top of the external powder collecting container 5.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (1)

1. A primary screening and powder collecting device for 3D intelligent manufacturing is used for carrying out primary screening and powder collecting operation on powder in a forming bin (1) after 3D printing operation is finished; the forming bin (1) is located below the 3D printing sealing bin, an open top of the forming bin (1) is vertically and upwards fixedly butted with a through hole with the same caliber as the through hole on the bottom (2) of the 3D printing sealing bin, an electric control lifting mechanism (3) is fixedly arranged on the inner bottom surface of the forming bin (1), the lifting end of the electric control lifting mechanism (3) is vertically and upwards butted with the lower surface of a base plate (4), the base plate (4) is in a horizontal posture, the outer diameter of the base plate (4) is matched with the inner diameter of the cross section of the forming bin (1), and the base plate (4) moves along with the up-down movement of the lifting end of the electric control lifting mechanism (3);
the method is characterized in that: the primary screening powder collecting device comprises an external powder collecting container (5), an internal cylinder (6) and a rotating motor (7); the forming bin (1) is cylindrical, and a first hollow structure (8) is arranged on the forming bin (1) around the side wall corresponding to the area above the lowest position of the substrate (4); the inner cylinder (6) is of a cylindrical barrel structure with only an open top surface, the inner diameter of the section of the inner cylinder (6) is adapted to the outer diameter of the section of the forming bin (1), the height of the inside of the inner cylinder (6) is greater than that of the forming bin (1), the inner cylinder (6) is detachably sleeved on the periphery of the forming bin (1) from the position, under the forming bin (1), of the open top surface of the inner cylinder (6) in a vertical upward posture, the inner wall of the inner cylinder (6) is in contact with the outer wall of the forming bin (1), and the inner cylinder (6) and the forming bin (1) rotate relatively on a concentric shaft; based on the mutual positions of the contact state of the open edge of the top surface of the inner cylinder (6) and the lower surface of the bottom (2) of the 3D printing sealed cabin, a first hollow structure which is the same as the first hollow structure (8) on the side wall of the forming cabin (1) is arranged in the area, corresponding to the first hollow structure (8) on the forming cabin (1), on the side wall of the inner cylinder (6); along with the rotation of the inner cylinder (6) relative to the forming bin (1), the sealing state or the hollowed-out state of one circle of the side wall of the forming bin (1) is realized through the dislocation or butt joint of the first hollowed-out structure on the side wall of the inner cylinder (6) and the first hollowed-out structure (8) on the side wall of the forming bin (1);
the external powder collecting container (5) is of a cylindrical barrel structure with only an open top surface, the inner diameter of an open top surface of the external powder collecting container (5) is larger than the outer diameter of the section of the internal cylinder (6), and the two have a difference of a preset distance difference; the outer powder collecting container (5) is movably sleeved on the periphery of the inner cylinder (6) from the position right below the inner cylinder (6) with the top surface open vertically upwards, the central shaft of the outer powder collecting container (5) is collinear with the central shaft of the inner cylinder (6), the motor of the rotating motor (7) is fixedly arranged at the central position of the inner bottom surface of the outer powder collecting container (5), the end part of the rotating rod of the rotating motor (7) is vertically upwards fixedly butted with the central position of the outer bottom surface of the inner cylinder (6), and the inner cylinder (6) rotates with the central shaft as the shaft along with the rotation of the rotating rod of the rotating motor (7); based on the contact state of the open edge of the top surface of the inner cylinder (6) and the lower surface of the bottom (2) of the 3D printing sealed cabin, the open edge of the top surface of the outer powder collecting container (5) is detachably butted with the lower surface of the bottom (2) of the 3D printing sealed cabin, and the positions of the outer powder collecting container (5) and the 3D printing sealed cabin are fixed; a control key of the rotating motor (7) is externally connected to the outside of the external powder collecting container (5) and is used for carrying out rotation control on the rotating motor (7);
the powder collecting device is characterized by further comprising a closed annular extension (9), the closed annular extension (9) is of a plane structure, the inner diameter of the closed annular extension (9) is matched with the outer diameter of an open top surface of the inner cylinder (6), the outer diameter of the closed annular extension (9) is larger than the inner diameter of the closed annular extension, the difference value of the preset distance between the inner diameter of the open top surface of the outer powder collecting container (5) and the outer diameter of the cross section of the inner cylinder (6) is larger than the difference value of the outer diameter of the closed annular extension (9) and the inner diameter of the closed annular extension, the inner periphery of the closed annular extension (9) is fixedly butted to the outer periphery of the open top surface of the inner cylinder (6), and the surface where the closed annular extension (9) is located is perpendicular to the central axis of the inner cylinder (6); based on the contact state of the open edge of the top surface of the inner cylinder (6) and the lower surface of the bottom (2) of the 3D printing sealed cabin, the upper surface of the closed annular extension (9) is in contact with the lower surface of the bottom (2) of the 3D printing sealed cabin, and the closed annular extension (9) rotates relative to the lower surface of the bottom (2) of the 3D printing sealed cabin along with the rotation of the inner cylinder (6); the surface of the closed annular extension (9) and the area, corresponding to the closed annular extension (9), of the bottom (2) of the 3D printing sealed cabin are respectively provided with second hollow structures (10) with the same structures; based on the rotation of the closed annular extension (9) along with the inner cylinder (6), the closed state or the hollow state of the area, where the second hollow structure (10) is arranged, on the bottom (2) of the 3D printing sealing bin is realized through the dislocation or butt joint of the second hollow structure on the surface of the closed annular extension (9) and the second hollow structure (10) on the bottom (2) of the 3D printing sealing bin; and a circle of the side wall of the forming bin (1) and an area of the second hollow structure (10) on the bottom (2) of the 3D printing sealing bin synchronously present a closed state or a hollow state;
still include keeping off feed cylinder (11), keep off feed cylinder (11) both ends open, and link up each other, keep off the internal diameter of feed cylinder (11) and rotate motor (7) and go up the external diameter of motor and suit, keep off feed cylinder (11) and be located outside powder collection container (5), and the cover is located the periphery of rotating motor (7) and going up the motor, keep off feed cylinder (11) above-mentioned to outside powder collection container (5) interior bottom surface port edge a week, with outside powder collection container (5) interior bottom surface fixed connection, keep presetting the clearance towards the port edge of inside drum (6) outer bottom surface above keeping inside drum (11).
CN201911045365.5A 2019-10-30 2019-10-30 Primary screening and powder collecting device for 3D intelligent manufacturing Active CN110625941B (en)

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US20170072466A1 (en) * 2015-09-16 2017-03-16 Applied Materials, Inc. Selectively openable support platen for additive manufacturing
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