CN116984633B - Purging device for 3D printing - Google Patents

Purging device for 3D printing Download PDF

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Publication number
CN116984633B
CN116984633B CN202311242058.2A CN202311242058A CN116984633B CN 116984633 B CN116984633 B CN 116984633B CN 202311242058 A CN202311242058 A CN 202311242058A CN 116984633 B CN116984633 B CN 116984633B
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China
Prior art keywords
filter
air
tank
filtering
shell
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CN202311242058.2A
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CN116984633A (en
Inventor
胡津
董小磊
刘浩
杜东方
李小汝
张永盛
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Sichuan Engineering Technical College
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Sichuan Engineering Technical College
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/70Gas flow means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00Apparatus for additive manufacturing; Details thereof or accessories therefor

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The application discloses a purge device for 3D printing, which comprises a shell, wherein an air inlet and an air outlet are arranged on the shell, an air suction fan is arranged in the air inlet, and a unidirectional flow limiting component for controlling the flow direction of air flow is arranged in the air outlet; a first filter assembly and an electrostatic adsorption assembly are sequentially arranged in the shell along the airflow direction, the first filter assembly comprises a plurality of stages of filter devices, and the filter grade of each filter device is gradually increased along the airflow direction; according to the air filtering device, air is filtered through the multistage filtering device and the electrostatic adsorption device, so that the cleanliness of purge air is guaranteed, and the quality of 3D printing is improved; simultaneously this application still avoids all dust gathering in first level or preceding several grades filter equipment through the regulation of filtration grade, causes filter equipment to block up, and above-mentioned technical means can rationally adjust filter equipment's at all levels work load to extension filter equipment's life can also effectively improve filtration quality simultaneously.

Description

Purging device for 3D printing
Technical Field
The application relates to the technical field of 3D printing equipment, in particular to a purging device for 3D printing.
Background
The metal 3D printing is a metal rapid forming technology, is a technology for constructing a three-dimensional shape by applying powdery metal and performing selective laser sintering, and is a manufacturing and forming method for adding and selectively solidifying metal material powder layer by layer in a forming chamber; in the actual operation process, a lot of dust is often attached to the surface of a printed object, so that the printing effect is affected; in order to clear the dust, a purging device is often adopted in the prior art to clean a workpiece, but the purging effect is poor due to the dust in the air, so that the quality of 3D printing is reduced.
Disclosure of Invention
The main aim of this application is to provide a sweep device for 3D prints, aims at solving the defect that 3D prints the quality poor that exists among the prior art.
The application realizes the aim through the following technical scheme:
the purging device for 3D printing comprises a shell, wherein an air inlet and an air outlet are formed in the shell;
the air suction fan is arranged in the air inlet;
the first filter assembly is arranged in the shell, and comprises a plurality of stages of filter devices along the airflow direction, and the filter grade of each filter device is gradually increased along the airflow direction;
the electrostatic adsorption component is arranged in the shell, is positioned at the rear side of the first filtering component along the flow direction of the air flow and is used for adsorbing fine dust in the air flow;
the unidirectional flow limiting assembly is arranged in the exhaust port and cuts off an airflow channel of the airflow entering the shell from the exhaust port.
Optionally, the first filtering component comprises a plurality of stages of filtering tanks, the upper end and the lower end of each filtering tank are respectively provided with an air outlet pipe and an air inlet pipe, and the air inlet pipes of the two adjacent stages of filtering tanks are connected with the air outlet pipes; along the air flow direction, each filter tank is internally provided with a dust sedimentation component and a filter device in sequence.
Optionally, the dust settling assembly comprises a plurality of stages of baffles, and two sides of each baffle are respectively connected with the filtering tank; the mounting height of each baffle plate is reduced in turn along the air flow direction.
Optionally, the filtering device comprises a plurality of stages of filters; the filtration grade of the filter in each filter tank is gradually increased along the airflow flowing direction.
Optionally, along the air flow direction, a plurality of supporting frames are arranged in each filtering tank, and each supporting frame is provided with a filter.
Optionally, the bottom of each filter tank is further provided with a dust box, and the side wall of the filter tank is provided with an access door.
Optionally, the electrostatic adsorption component comprises a plurality of adsorption tanks, and each adsorption tank is communicated with each other; the adsorption tank is internally provided with an anode rod and a cathode cover which are coaxial with each other, the anode rod is also provided with an insulating partition plate with a spiral structure, and the insulating partition plate is attached to the inner wall of the cathode cover.
Optionally, the adsorption tank comprises a tank body, and a support ring matched with the cathode cover is arranged in the tank body; the top of the tank body is provided with a sealing cover, and the bottom of the tank body is provided with a dust collection box communicated with the tank body.
Optionally, the unidirectional current limiting component comprises an exhaust pipe, wherein a plurality of sealing plates are arranged in the exhaust pipe, and the sealing plates are spliced with each other to seal the exhaust pipe; one end of each sealing plate is hinged with the exhaust pipe respectively, and the other end of each sealing plate is connected with the exhaust pipe respectively through a tension spring.
Optionally, a connecting box is further arranged on the shell, and an adjusting screw rod is rotatably arranged on the connecting box; the two ends of the adjusting screw rod are respectively connected with a left clamping claw and a right clamping claw through connecting threads with opposite screwing directions.
Compared with the prior art, the application has the following beneficial effects:
the air inlet is internally provided with an air suction fan, and the air outlet is internally provided with a unidirectional flow limiting component for controlling the flow direction of air flow; a first filter assembly and an electrostatic adsorption assembly are sequentially arranged in the shell along the airflow direction, the first filter assembly comprises a plurality of stages of filter devices, and the filter grade of each filter device is gradually increased along the airflow direction;
when the purging device is used, air is pumped into the first filtering component through the air suction fan, and dust with larger granularity in the air is filtered through each stage of filtering devices of the first filtering component; the residual fine dust after filtration is adsorbed by the electrostatic adsorption component, so that the quantity of dust in the air output by the purging device is ensured to reach the quality standard, excessive dust is prevented from being brought in the purging process, and the molding quality of 3D printing is improved;
compared with the prior art, the dual dust filtering device is arranged, meanwhile, along the airflow flowing direction, the filtering grade of each stage of filtering device of the first filtering component is gradually increased, namely, each stage of filtering device leaks dust with the granularity smaller than the filtering limit of the stage, and on one hand, all dust can be prevented from being accumulated in the first stage or the first several stages of filtering devices to cause the blocking of the filtering device through the adjustment of the filtering grade; on the other hand, the workload of each stage of filter device can be reasonably regulated by the technical means, so that the service life of the filter device is prolonged, and the filter quality can be effectively improved;
simultaneously, this application still is provided with one-way current limiting component, avoids outside air to enter into the device through the gas vent through one-way current limiting component to avoid blowing the in-process and appear the air reflux, guarantee the inside cleanliness factor of whole blowing device.
Drawings
Fig. 1 is a schematic structural diagram of a purge device for 3D printing according to embodiment 1 of the present application;
fig. 2 is an exploded view of a purge device for 3D printing according to embodiment 1 of the present application;
fig. 3 is a cross-sectional view of a purge device for 3D printing according to embodiment 1 of the present application;
FIG. 4 is an exploded view of an electrostatic chuck assembly;
FIG. 5 is a cross-sectional view of an electrostatic chuck assembly;
FIG. 6 is a schematic view of a first filter assembly;
FIG. 7 is an exploded view of the first filter assembly;
FIG. 8 is a cross-sectional view of a first filter assembly;
FIG. 9 is a schematic diagram of a one-way flow restrictor assembly;
FIG. 10 is a schematic diagram of a connector box;
reference numerals: 1-shell, 2-air inlet, 3-air outlet, 4-suction fan, 5-filter tank, 6-outlet duct, 7-air inlet pipe, 8-baffle, 9-filter, 10-support frame, 11-dust box, 12-access door, 13-adsorption tank, 14-anode rod, 15-cathode cover, 16-insulation division plate, 17-exhaust pipe, 18-sealing plate, 19-tension spring, 20-connection box, 21-adjusting screw, 22-left clamping claw, 23-right clamping claw, 1301-tank body, 1302-support ring, 1303-sealing cover and 1304-dust box.
The realization of the objects, the functional characteristics and the advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Embodiment 1
Referring to fig. 1 to 10, this embodiment is an optional embodiment of the present application, and discloses a purge device for 3D printing, which comprises a housing 1, one side of the housing 1 is provided with an air inlet 2, the other side of the housing is provided with an air outlet 3, an air suction fan is arranged in the air inlet 2, along the airflow flowing direction, a plurality of isolation plates are sequentially arranged in the housing 1, the housing 1 is divided into a plurality of mutually independent chambers by the isolation plates, along the airflow flowing direction, the air suction fan is communicated with a first chamber, a first filter assembly is arranged in a second chamber, an electrostatic adsorption assembly is arranged in a third chamber, the air outlet 3 is communicated with the third chamber, and meanwhile, a unidirectional flow limiting assembly is also arranged in the air outlet 3.
The first filtering component comprises a plurality of stages of mutually independent filtering tanks 5, an air outlet pipe 6 is arranged on the upper side of each filtering tank 5, and an air inlet pipe 7 is arranged on the lower side of each filtering tank 5; and meanwhile, the bottom surface of the filter tank 5 is also provided with a dust box 11, and the dust box 11 is communicated with the bottom surface of the filter tank 5 so as to realize dust recovery.
Each filtering tank 5 is arranged side by side, an air inlet pipe 7 and an air outlet pipe 6 between two adjacent filtering tanks 5 are communicated, the air inlet pipe 7 of the first-stage filtering tank 5 passes through a partition plate to be communicated with the first chamber, and the air outlet pipe 6 of the last-stage filtering tank 5 passes through the partition plate to be communicated with the air inlet end of the electrostatic adsorption component.
The middle part of the filter tank 5 is also provided with an access door 12, a plurality of support frames 10 are sequentially arranged in the filter tank 5 according to the airflow flowing direction, the support frames 10 are in a U-shaped structure, the opening ends of the support frames are opposite to the access door 12, each support frame 10 is also provided with a filter 9 in a sliding mode, and the filter 9 is fixed with the support frame 10 through screws.
Through the structure, the connection module 11 can be conveniently installed and removed, so that a person skilled in the art can replace the filtering device in time, and the maintainability of equipment is improved.
It should be noted that, the grades of the filters 9 disposed in different filter tanks 5 are different, and the distribution rule is that, along the air flow direction, the filtration grade of the filters 9 is gradually increased, for example, a primary filter is disposed in the first stage filter tank 5, and a secondary filter is disposed in the second stage filter tank; while the filtration grade of each filter 9 located in the same canister 5 is the same.
A dust sedimentation assembly is further arranged in each filtering tank 5, and comprises a plurality of stages of baffle plates 8, and two sides of each baffle plate 8 are respectively connected with two sides of each filtering tank 5; an air flow channel for air to pass through is arranged between two adjacent baffles 8, and the front surface of each baffle 8 is opposite to the air inlet pipe 7.
The installation height of each baffle plate 8 is reduced in sequence along the flow direction of the air flow; through the arrangement of the structure, an L-shaped airflow route can be formed at the bottom of the filter tank 5, when the airflow carrying dust enters the filter tank 5 from the air inlet pipe 7, the airflow collides with the front surface of the baffle plate 8 along the horizontal direction, and in the collision process, the dust with larger weight is attached to the baffle plate 8, falls to the bottom of the filter tank 5 under the action of self gravity and finally enters the dust box 11; the air flow is redirected by the baffle 8 and then upwards into the filter 9 for further filtration.
The baffles 8 with different heights can realize natural layered filtration on the air flow, realize layered orderly flow of the air flow, avoid mutual interference between the air flows, and not only be favorable for improving the filtration efficiency.
Meanwhile, it should be noted that the distance between two adjacent baffles 8 may be the same, or may be gradually increased along the air flow direction, so as to control the size of the air flow channel, and thus guide the air flow to the distal end of the air inlet pipe 7, so as to realize uniform distribution of the air flow.
The electrostatic adsorption assembly comprises a plurality of adsorption tanks 13, each adsorption tank 13 comprises a tank body 1301, a sealing cover 1303 is arranged at the top of each tank body 1301, a dust collection box 1304 communicated with each tank body is arranged at the bottom of each tank body, an air inlet 2 is arranged at the upper side of each tank body 1301, an air outlet is arranged at the lower side of each tank body, and the air inlets 2 and the air outlets between two adjacent adsorption tanks 13 are mutually communicated.
An anode rod 14 and a cathode cover 15 are further arranged in the tank 1301, the anode plate and the cathode cover 15 are coaxially arranged, a supporting ring 1302 is further arranged in the tank 1301, and the cathode cover 15 is placed on the supporting ring 1302; the anode rod 14 is further provided with an insulating partition plate 16 having a spiral structure, and the insulating partition plate 16 is attached to the inner wall of the cathode cover 15.
When in use, the air filtered by the first filtering component enters the first-stage adsorption tank 13 and flows along the spiral channel in a rotating way, and an adsorption electric field is formed in the adsorption tank 13 through the anode rod 14 and the cathode cover 15, so that fine dust in the air is adsorbed on the cathode cover 15.
Compared with the prior art, the air flow channel with the spiral structure is formed in the adsorption tank 13 through the insulating partition plate with the spiral structure, so that the time of the air flow in the adsorption tank 13 can be effectively prolonged, meanwhile, the continuously rotating air flow can generate larger centrifugal force, dust can be thrown out, and the electrostatic adsorption component can adsorb dust with smaller granularity by matching with the adsorption force of an electric field, so that the adsorption dust removal effect is improved; the technical effect can be realized through the structural change of the insulating partition plate 16, and no additional equipment is needed, so that the structure of the whole device is simplified, and the running stability and reliability of the equipment are improved.
The unidirectional current limiting assembly comprises an exhaust pipe 17, the exhaust pipe 17 is arranged in the exhaust port 3, a plurality of sealing plates 18 are arranged in the exhaust pipe 17, and the sealing plates 18 are mutually spliced to completely block the through flow surface of the exhaust pipe 17; one end of each sealing plate 18 is hinged with the inner wall of the exhaust pipe 17, a flow equalizing plate is further arranged right above each sealing plate 18, and the free end of each sealing plate 18 is respectively connected with the flow equalizing plate through a tension spring 19.
The air flow can be effectively blocked through the device, and the air flow enters the air flow channel inside the shell 1 from the outside through the air outlet 3, so that air backflow is prevented, and a large amount of dust is prevented from being substituted into the shell 1 by air.
A connecting box 20 is further arranged on the outer surface of the shell 1, and an adjusting screw 21 is rotatably arranged on the connecting box 20; the two ends of the adjusting screw rod 21 are respectively connected with a left clamping claw 22 and a right clamping claw 23 through connecting threads with opposite rotation directions; during the use, through rotatory regulation lead screw 21 control left gripper jaw 22 and right gripper jaw 23 draw close each other or deviate from each other, and then realize being connected with the stability of external structure, be convenient for with purge equipment is fixed in on the 3D printing apparatus, and then realize the real-time operation of blowing in the printing process, be favorable to improving processingquality, it still has convenient operation simultaneously, advantage such as simple structure.
When the dust filter is used, air in the external atmosphere is extracted through the air suction fan, the extracted air firstly enters the first filter assembly, and dust with larger granularity in the air is filtered through each stage of filter devices of the first filter assembly; and then, the residual fine dust after filtration is adsorbed through the electrostatic adsorption component, so that the quantity of dust in the air output by the purging device is ensured to reach the quality standard, excessive dust is prevented from being brought in the purging process, and the molding quality of 3D printing is improved.
Compared with the prior art, the dual dust filtering device is arranged, meanwhile, along the airflow flowing direction, the filtering grade of each stage of filtering device of the first filtering component is gradually increased, namely, each stage of filtering device leaks dust with the granularity smaller than the filtering limit of the stage, and on one hand, all dust can be prevented from being accumulated in the first stage or the first several stages of filtering devices to cause the blocking of the filtering device through the adjustment of the filtering grade; on the other hand, through the technical means, the work load of each stage of filtering device can be reasonably adjusted, so that the service life of the filtering device is prolonged, and meanwhile, the filtering quality can be effectively improved.
And secondly, the electrostatic adsorption device adsorbs fine dust which is difficult to filter in the air through an electric field, and clean air after dust removal is discharged from an exhaust port through a one-way flow limiting assembly to finish purging.
Simultaneously, this application still is provided with one-way current limiting component, avoids outside air to enter into the device through the gas vent through one-way current limiting component to avoid blowing the in-process and appear the air reflux, guarantee the inside cleanliness factor of whole blowing device.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.

Claims (5)

1. A purging device for 3D printing, which is characterized by comprising a shell (1), wherein an air inlet (2) and an air outlet (3) are arranged on the shell (1);
the air suction fan is arranged in the air inlet (2);
the first filter assembly is arranged in the shell (1) and comprises a plurality of stages of filter devices along the airflow direction, and the filter grade of each filter device is gradually increased along the airflow direction;
the first filtering component comprises a plurality of stages of filtering tanks (5), the upper end and the lower end of each filtering tank (5) are respectively provided with an air outlet pipe (6) and an air inlet pipe (7), and the air inlet pipes (7) of the adjacent two stages of filtering tanks (5) are connected with the air outlet pipes (6); along the air flow direction, a dust sedimentation component and a filtering device are sequentially arranged in each filtering tank (5);
the dust sedimentation assembly comprises a plurality of stages of baffles (8), and two sides of each baffle (8) are respectively connected with the filtering tank (5); the installation height of each baffle (8) is reduced in turn along the air flow direction;
an air flow channel for air to pass through is arranged between two adjacent baffles (8), and the front surface of each baffle (8) is opposite to the air inlet pipe (7); through the structure, an L-shaped airflow route can be formed at the bottom of the filter tank (5);
the filtering device comprises a plurality of stages of filters (9); the filtration grade of the filter (9) in each filter tank (5) is gradually increased along the airflow flowing direction;
the electrostatic adsorption component is arranged in the shell (1) and is positioned at the rear side of the first filtering component along the flow direction of the air flow to adsorb fine dust in the air flow;
the electrostatic adsorption component comprises a plurality of adsorption tanks (13), and the adsorption tanks (13) are mutually communicated; an anode rod (14) and a cathode cover (15) which are coaxial with each other are arranged in the adsorption tank (13), an insulating partition plate (16) with a spiral structure is further arranged on the anode rod (14), and the insulating partition plate (16) is attached to the inner wall of the cathode cover (15);
the unidirectional flow limiting assembly is arranged in the exhaust port (3) and cuts off an airflow channel of airflow entering the shell (1) from the exhaust port (3);
the unidirectional current limiting assembly comprises an exhaust pipe (17), a plurality of sealing plates (18) are arranged in the exhaust pipe (17), and the sealing plates (18) are spliced with each other to seal the exhaust pipe (17); one end of each sealing plate (18) is hinged with the exhaust pipe (17), and the other end of each sealing plate (18) is connected with the exhaust pipe (17) through a tension spring (19).
2. A purging device for 3D printing according to claim 1, characterized in that in each of the filter canisters (5) a number of support frames (10) are arranged in the direction of the air flow, each support frame (10) being provided with a filter (9).
3. A purging device for 3D printing according to claim 2, characterized in that each filter tank (5) is further provided with a dust box (11) at the bottom, the side walls of the filter tank (5) being provided with an access door (12).
4. A purge device for 3D printing according to claim 1, wherein the adsorption tank (13) comprises a tank body (1301), a support ring (1302) adapted to the cathode casing (15) being provided inside the tank body (1301); the top of the tank body (1301) is provided with a sealing cover (1303), and the bottom of the tank body (1301) is provided with a dust collection box (1304) communicated with the tank body.
5. A purging device for 3D printing according to claim 1, characterized in that the housing (1) is further provided with a connection box (20), and the connection box (20) is rotatably provided with an adjusting screw (21); the two ends of the adjusting screw rod (21) are respectively connected with a left clamping claw (22) and a right clamping claw (23) through connecting threads with opposite rotation directions.
CN202311242058.2A 2023-09-25 2023-09-25 Purging device for 3D printing Active CN116984633B (en)

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Application Number Priority Date Filing Date Title
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CN116984633B true CN116984633B (en) 2023-12-22

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