A suction screen all-in-one machine

Abstract

The utility model discloses a kind of suction screen supply integrated machines, it is related to metal 3D printing technical field, to solve the problem of powder processing in metal 3D printing relies on artificial.It includes powder suction feeding assembly, vibrating screen powder assembly, buffer feeding assembly, tail powder filtering assembly and equipment pipeline assembly;Equipment pipeline assembly connects each component, powder suction feeding assembly transports new powder, vibrating screen powder assembly screens new powder and recycled powder, buffer feeding assembly stores qualified powder and feeds 3D printing equipment, tail powder filtering assembly collects fine powder and realizes gas circulation, this integrated machine realizes powder processing full automation, without manual transfer, reduce labor cost and labor intensity, by pipeline transportation combination protective gas prevent powder contact air, damp, avoid the problem of delayed powder collection, powder mixing caused by manual operation, while eliminating personnel inhale harmful metal powder, safeguard health, applicable to metal 3D printing powder processing scene.

Description

Technical Field

[0001] This utility model relates to the field of metal 3D printing technology, and in particular to an integrated suction, screening and feeding machine. Background Technology

[0002] Metal powder sieving, powder feeding, powder recycling, and waste powder collection are four types of powder that need to be handled promptly during the operation of metal additive manufacturing equipment (metal 3D printing). In actual production, the transfer and connection of these four powders usually require manual intervention. During sieving, the new powder is manually transported to the sieving machine for sieving and collection. After sieving, the sieved powder is manually transferred to the equipment hopper through the powder tank, and the powder tank and equipment hopper are manually connected to complete the powder feeding. Excess powder generated during equipment operation is recycled into the powder collection tank. Once the powder tank is full, the recycled powder is manually transferred to the sieving equipment for sieving and reuse. Waste powder generated during equipment operation is also collected and processed manually.

[0003] The process faces several challenges: 1) Manual handling and transfer are required, increasing labor costs and intensity; 2) Manual handling and transfer increase the possibility of powder coming into contact with air, increasing powder humidity and affecting printing results; 3) The high degree of autonomy required for manual handling makes it difficult to handle powder issues promptly according to production processes / regulations, such as delayed powder collection or powder mixing; 4) Health concerns: Metal powder is harmful to health, and although operators wear protective equipment during production, they inevitably inhale trace amounts of powder. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes an integrated suction, screening, and supply machine.

[0005] This utility model proposes an integrated suction, screening, and feeding machine, which includes a powder suction and feeding component, a vibrating powder screening component, a buffer feeding component, a tail powder filtration component, and a pipeline component. The powder suction and feeding component is connected to the vibrating powder screening component through the pipeline component, the vibrating powder screening component is connected to the buffer feeding component, and the tail powder filtration component is connected to the vibrating powder screening component. The pipeline component is distributed among the powder suction and feeding component, the vibrating powder screening component, the buffer feeding component, and the tail powder filtration component.

[0006] Furthermore, the powder feeding assembly includes an upper valve for the feeding tank, a feeding powder tank, a first pipeline connector, and a feeding rack. The upper valve for the feeding tank is located at the top of the feeding powder tank and serves as the feeding interface for the feeding powder tank. It is opened during feeding and closed after feeding is completed. The first pipeline connector includes a control valve and an interface. The interface is used to connect the feeding powder tank to the equipment pipeline assembly. The control valve is in a closed state during the feeding and transportation of the feeding powder tank. The feeding rack is located at the bottom of the feeding powder tank and serves as a support base for the feeding powder tank.

[0007] Furthermore, the vibrating screen powder assembly includes a conveying blower, a second pipeline connector, a conveying pipeline, a cyclone separator, a micro powder pipeline, a control valve, a vibrating screen, a powder screening pipeline, and a residual powder collection tank. The conveying blower provides power for powder conveying. The second pipeline connector is connected to the first pipeline connector of the powder suction and feeding assembly. The conveying pipeline connects the second pipeline connector to the cyclone separator. The cyclone separator is used to buffer qualified powder and discharge micro powder. Qualified powder is retained in the cyclone separator. Micro powder is conveyed to the tail powder filtration assembly through the micro powder pipeline. The control valve is located below the cyclone separator and is used to control the qualified powder in the cyclone separator to enter the vibrating screen. The powder screening pipeline connects the vibrating screen to the buffer feeding assembly and is used to convey the qualified powder after screening by the vibrating screen to the buffer feeding assembly. The residual powder collection tank is connected to the vibrating screen.

[0008] Furthermore, the buffer feeding assembly includes a buffer tank, a buffer tank control valve, a powder supply pipeline, and a pipeline control valve. The buffer tank is connected to the vibrating screen through a powder screening pipeline. The buffer tank control valve is located at the bottom of the buffer tank. The powder supply pipeline connects the buffer tank to the external 3D printing equipment. The pipeline control valve is located at the connection between the powder supply pipeline and the equipment pipeline assembly.

[0009] Furthermore, the tail powder filtration assembly includes a micro powder processing component, a tail powder pipeline, a tail powder recovery tank, and a gas circulation pipeline. The micro powder processing component is connected to the micro powder pipeline, and the tail powder pipeline is connected to the micro powder processing component and the tail powder processing component. The tail powder processing component is used to filter the tail powder in the airflow, and the filtered tail powder falls into the tail powder recovery tank. The gas circulation pipeline is connected to the tail powder processing component and the conveying fan, so that the filtered gas flows back to the conveying fan, forming a gas circulation system.

[0010] Furthermore, the equipment piping assembly is equipped with a nitrogen inlet port for introducing nitrogen into the pipeline.

[0011] Furthermore, the micro powder pipeline of the vibrating screen powder assembly is equipped with a front-end control valve and a rear-end control valve. During the new powder feeding stage, the front-end control valve is open and the rear-end control valve is closed, so that the micro powder discharged from the cyclone separator is only transported to the micro powder processing assembly through the micro powder pipeline. During the powder return circulation stage, the conveying path of the micro powder is adjusted by regulating the opening and closing states of the front-end control valve and the rear-end control valve.

[0012] The beneficial effects of this utility model are as follows: Through the coordinated operation of the powder feeding component, vibrating screen powder component, buffer feeding component, tail powder filtration component, and equipment pipeline component, the entire process of new powder supply, powder recycling, micro powder recovery, and waste powder collection required for metal additive manufacturing equipment is fully automated. There is no need for manual intervention in powder transfer and docking, which not only significantly reduces labor costs and labor intensity, but also completely blocks the contact between powder and air through pipeline sealing and nitrogen protection, avoiding the increase of powder humidity from affecting the printing effect. At the same time, it eliminates the problems of delayed powder collection and powder mixing caused by the high degree of autonomy of manual operation, and eliminates the risk of operators coming into contact with harmful metal powder, ensuring their health. It comprehensively solves various defects of existing manual powder handling methods and significantly improves the efficiency, stability, and safety of powder handling in metal 3D printing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the powder suction and feeding component in this utility model; Figure 3 This is a schematic diagram of the structure of the vibrating screen powder assembly in this utility model; Figure 4 This is a schematic diagram of the structure of the buffer powder supply component in this utility model; Figure 5 This is a schematic diagram of the tail powder filtration component in this utility model.

[0014] In the diagram: 1. Powder suction and feeding assembly; 101. Upper valve of the feeding tank; 102. Feeding powder tank; 103. First pipeline connector; 104. Feeding rack; 2. Vibrating screen powder assembly; 201. Conveying fan; 202. Second pipeline connector; 203. Conveying pipeline; 204. Cyclone separator; 205. Micro powder pipeline; 206. Control valve; 207. Vibrating screen; 208. Powder screening pipeline; 209. Residual powder collection tank; 3. Buffer feeding assembly; 301. Buffer tank; 302. Buffer tank control valve; 303. Powder supply pipeline; 304. Pipeline control valve; 4. Tail powder filtration assembly; 401. Micro powder processing assembly; 402. Tail powder pipeline; 403. Tail powder processing assembly; 404. Tail powder recovery tank; 405. Gas circulation pipeline; 5. Equipment pipeline assembly. Detailed Implementation

[0015] Reference Figure 1-5This utility model proposes an integrated suction, screening, and feeding machine to solve the automated processing problems of new powder feeding, powder recycling, micro powder recovery, and waste powder collection in metal 3D printing. It includes a powder suction and feeding component 1, a vibrating screen powder component 2, a buffer feeding component 3, a tail powder filtration component 4, and a pipeline component 5. The pipeline component 5 serves as the connecting hub for all components, achieving sealed transmission of powder and airflow. The powder suction and feeding component 1 is the starting point for new powder input, the vibrating screen powder component 2 is the core of powder screening and processing, the buffer feeding component 3 is responsible for storing and feeding qualified powder, and the tail powder filtration component 4 completes micro powder recovery and gas circulation. These five components work together to automate the powder processing in metal 3D printing. The specific technical solution is as follows: The powder feeding assembly 1 specifically consists of an upper valve 101 for the feeding tank, a feeding powder tank 102, a first pipeline connector 103, and a feeding rack 104. The feeding powder tank 102 is a temporary storage carrier for new powder, adopting a stainless steel sealed tank structure to effectively isolate external air and moisture. The upper valve 101 installed on its top is the only interface for feeding new powder. It is opened during feeding and closed immediately after feeding to prevent the powder from contacting air during the storage stage. The bottom of the feeding powder tank 102 is connected to the first pipeline connector 103. The first pipeline connector 103 consists of a control valve and a standardized interface. The interface end is sealed and connected to the equipment pipeline assembly 5. The control valve is controlled by the control system to adjust the switch status. It remains closed during the new powder feeding and non-feeding stages of the equipment. It is only opened when new powder needs to be fed to the vibrating screen powder assembly 2 to prevent powder leakage or air intrusion. The feeding rack 104 is set at the bottom of the feeding powder tank 102. It adopts a carbon steel welded frame structure to provide stable support for the feeding powder tank 102 and prevent the tank from tipping over or shifting during feeding or conveying. The vibrating screen powder assembly 2, as the core component of powder processing, consists of a conveying blower 201, a second pipeline connector 202, a conveying pipeline 203, a cyclone separator 204, a micro-powder pipeline 205, a control valve 206, a vibrating screen 207, a powder screening pipeline 208, and a residual powder collection tank 209. The conveying blower 201 is the power source for the entire system, employing a negative pressure centrifugal blower. Its inlet is connected to the gas circulation pipeline 405 of the tail powder filter assembly 4, and its outlet is connected to the second pipeline connector 202. It drives powder flow through negative pressure adsorption. The interface specifications of the second pipeline connector 202 match those of the first pipeline connector 103, using a flange seal connection to ensure no leakage when new powder is conveyed from the powder suction and feeding assembly 1 to the vibrating screen powder assembly 2. An internal one-way valve is also provided to prevent powder backflow. The conveying pipeline 203 connects the second pipeline connector 202 to the cyclone separator 204, using a polished stainless steel pipe to reduce powder adhesion. The powder enters the cyclone separator with the airflow. After the air separator 204, preliminary separation is achieved under centrifugal force. Qualified powder with a particle size ≥50μm is thrown towards the wall of the separator and falls to the bottom, while micro powder with a particle size <50μm is carried by the airflow into the micro powder pipeline 205. The micro powder pipeline 205 is equipped with a front-end control valve and a rear-end control valve, which can be used to adjust the micro powder conveying path. For example, during the new powder feeding stage, the front-end valve is open and the rear-end valve is closed to ensure that the micro powder directly enters the tail powder filter assembly 4. The control valve 2 is installed at the bottom of the cyclone separator 204. 06. Linked with the material level sensor inside the separator, when the amount of qualified powder reaches the set value, the control valve 206 opens and discharges the powder into the vibrating screen 207. The vibrating screen 207 adopts an ultrasonic-assisted vibration structure with a screen aperture of 50μm to further screen qualified powder. The qualified powder that passes through the screen is transported to the buffer feeding component 3 through the powder screening pipe 208. The residual powder (clumps or impurities) that cannot pass through the screen is discharged into the residual powder collection tank 209 to achieve centralized recycling of residual powder. The buffer feeding assembly 3 consists of a buffer tank 301, a buffer tank control valve 302, a powder supply pipeline 303, and a pipeline control valve 304. It serves as the hub for storing and supplying qualified powder. The buffer tank 301 is connected to the vibrating screen 207 via a powder screening pipeline 208 and adopts the same sealing structure as the feeding powder tank 102. Pressure and level sensors are installed inside the tank to monitor the sealing status and the amount of powder stored in real time. The buffer tank control valve 302 at the bottom of the buffer tank 301 connects to the material hopper of the 3D printing equipment. Linked with the position sensor, when the equipment hopper is low on material, the buffer tank control valve 302 opens, and qualified powder is delivered to the equipment through the powder supply pipeline 303. The powder supply pipeline 303 adopts a multi-branch structure and can connect to multiple 3D printing equipment at the same time. The pipeline control valve 304 on each branch pipeline can not only achieve one-to-one precise material supply according to the control system instructions, but also open the valve when the equipment generates excess recycled powder, so that the recycled powder is returned to the vibrating screen powder assembly 2 through the equipment pipeline assembly 5 and re-participated in screening and reuse. The tail powder filtration assembly 4 is responsible for micro powder recovery and gas circulation. It consists of a micro powder processing assembly 401, a tail powder pipeline 402, a tail powder processing assembly 403, a tail powder recovery tank 404, and a gas circulation pipeline 405. The micro powder processing assembly 401 is a bag filter connected to the micro powder pipeline 205, with a filtration accuracy of 10μm. Micro powder carried by the airflow is intercepted by the filter bag and then cleaned by the pulse backflushing mechanism before falling into the tail powder pipeline 402. The tail powder pipeline 402 collects the micro powder and waste powder discharged from the equipment and then transports it to the tail powder processing assembly 403. The tail powder treatment component 403 uses a HEPA high-efficiency filter to further filter the ultrafine powder (particle size <10μm) remaining in the airflow. The filtered clean gas flows back to the conveying fan 201 through the gas circulation pipeline 405, forming a closed gas loop of fan-pipeline-separator-filter-fan to avoid air pollution. The filtered tail powder falls into the tail powder recovery tank 404 at the bottom. The tail powder recovery tank 404 adopts a drawer-type structure and can be directly pulled out for cleaning when the tank is full. The collected tail powder can be recycled and smelted as metal scrap. The equipment piping assembly 5 runs through all core components. The main body is made of 304 stainless steel pipe, with different inner diameters designed according to the conveying requirements (main pipe inner diameter 80-100mm, branch pipe inner diameter 50-60mm). All interfaces are connected by flange sealing, and the sealing gaskets are made of polytetrafluoroethylene to prevent powder leakage. The pipeline is equipped with a nitrogen inlet, which is connected to an external nitrogen tank through a pressure reducing valve. When the ambient humidity is >60%, nitrogen is automatically introduced (flow rate 0.5-1m³ / h) to maintain a slight positive pressure in the pipeline and prevent external moisture from mixing in. At the same time, a dust removal port is provided every 2-3m, equipped with a quick-opening sealing cover, which facilitates the regular cleaning of powder adhering to the pipeline and avoids blockage. The entire process of this suction, screening, and feeding integrated machine requires no manual intervention: after new powder is injected into the feeding powder tank 102 through the upper valve 101 of the feeding tank, the control system starts the conveying fan 201 and opens the first pipeline connection 103. Under negative pressure, the new powder enters the cyclone separator 204 through the equipment pipeline assembly 5 and the second pipeline connection 202. Qualified powder is screened by the vibrating screen 207 and then enters the buffer tank 301. According to the needs of the 3D printing equipment, it is precisely fed through the powder supply pipeline 303. The recycled powder generated by the equipment is returned to the vibrating screen powder assembly 2 for reuse through the pipeline control valve 304. The micro powder and tail powder generated in the whole process are collected by the tail powder filter assembly 4 and the clean gas is recycled and reused. Finally, the automation of new powder feeding, powder recycling and micro powder recovery is realized, while ensuring the dryness of the powder and the health of the operators.

[0016] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A suction, screening, and feeding integrated machine, characterized in that, It includes a powder feeding assembly (1), a vibrating screen powder assembly (2), a buffer feeding assembly (3), a tail powder filtration assembly (4), and a pipeline assembly (5). The powder feeding assembly (1) is connected to the vibrating screen powder assembly (2) through the pipeline assembly (5). The vibrating screen powder assembly (2) is connected to the buffer feeding assembly (3). The tail powder filtration assembly (4) is connected to the vibrating screen powder assembly (2). The pipeline assembly (5) is distributed among the powder feeding assembly (1), the vibrating screen powder assembly (2), the buffer feeding assembly (3), and the tail powder filtration assembly (4).

2. The suction, screening, and feeding integrated machine according to claim 1, characterized in that, The powder feeding assembly (1) includes an upper valve (101) of the feeding tank, a feeding powder tank (102), a first pipeline connector (103) and a feeding rack (104). The upper valve (101) of the feeding tank is located at the top of the feeding powder tank (102) and serves as the feeding interface of the feeding powder tank (102). It is opened when feeding and closed after feeding is completed. The first pipeline connector (103) includes a control valve and an interface. The interface is used to connect the feeding powder tank (102) and the equipment pipeline assembly (5). The control valve is closed during the feeding and transportation of the feeding powder tank (102). The feeding rack (104) is located at the bottom of the feeding powder tank (102) and serves as the support base of the feeding powder tank (102).

3. The suction, screening, and feeding integrated machine according to claim 1, characterized in that, The vibrating screen assembly (2) includes a conveying blower (201), a second pipeline connector (202), a conveying pipeline (203), a cyclone separator (204), a micro powder pipeline (205), a control valve (206), a vibrating screen (207), a powder screening pipeline (208), and a residual powder collection tank (209). The conveying blower (201) provides power for powder conveying. The second pipeline connector (202) is connected to the first pipeline connector (103) of the powder feeding assembly (1). The conveying pipeline (203) connects the second pipeline connector (202) to the cyclone separator (204). The cyclone separator ( 204) is used to buffer qualified powder and discharge micro powder. Qualified powder is retained in the cyclone separator (204). Micro powder is transported to the tail powder filter assembly (4) through the micro powder pipeline (205). The control valve (206) is set below the cyclone separator (204) to control the qualified powder in the cyclone separator (204) to enter the vibrating screen (207). The powder screening pipeline (208) connects the vibrating screen (207) and the buffer feeding assembly (3) to transport the qualified powder after screening by the vibrating screen (207) to the buffer feeding assembly (3). The residual powder collection tank (209) is connected to the vibrating screen (207).

4. The suction, screening, and feeding integrated machine according to claim 1, characterized in that, The buffer feeding assembly (3) includes a buffer tank (301), a buffer tank control valve (302), a powder supply pipeline (303), and a pipeline control valve (304). The buffer tank (301) is connected to the vibrating screen (207) through a powder screening pipeline (208). The buffer tank control valve (302) is located at the bottom of the buffer tank (301). The powder supply pipeline (303) connects the buffer tank (301) to an external 3D printing device. The pipeline control valve (304) is located at the connection between the powder supply pipeline (303) and the equipment pipeline assembly (5).

5. The suction, screening, and feeding integrated machine according to claim 1, characterized in that, The tail powder filtration assembly (4) includes a micro powder processing assembly (401), a tail powder pipeline (402), a tail powder processing assembly (403), a tail powder recovery tank (404), and a gas circulation pipeline (405). The micro powder processing assembly (401) is connected to the micro powder pipeline (205), and the tail powder pipeline (402) is connected to the micro powder processing assembly (401) and the tail powder processing assembly (403). The tail powder processing assembly (403) is used to filter the tail powder in the airflow, and the filtered tail powder falls into the tail powder recovery tank (404). The gas circulation pipeline (405) is connected to the tail powder processing assembly (403) and the conveying fan (201), so that the filtered gas flows back to the conveying fan (201) to form a gas circulation system.

6. The suction, screening, and feeding integrated machine according to claim 1, characterized in that, The equipment piping assembly (5) is equipped with a nitrogen inlet port for introducing nitrogen into the pipeline.

7. The suction, screening, and feeding integrated machine according to claim 3, characterized in that, The micro powder pipeline (205) of the vibrating screen powder assembly (2) is equipped with a front-end control valve and a rear-end control valve. During the new powder feeding stage, the front-end control valve is opened and the rear-end control valve is closed, so that the micro powder discharged from the cyclone separator (204) is only transported to the micro powder processing assembly (401) through the micro powder pipeline (205). During the powder return circulation stage, the conveying path of the micro powder is adjusted by regulating the opening and closing states of the front-end control valve and the rear-end control valve.

Images