Cavity box for laser 3D printer

Abstract

The invention provides a cavity box for a laser 3D printer. The cavity box comprises a printer body, a forming platform, a side blocking mechanism, a flowing purification part, a suction device and an adsorption mechanism. The forming platform is arranged in the printer body, the side blocking mechanism is arranged on the inner side wall of the printer body and located on the periphery of the forming platform, the flowing purification part is arranged on the printer body and the side blocking mechanism, the suction device is installed on the side blocking mechanism, and the flow purification part is arranged on the printer body and the side blocking mechanism. The adsorption mechanism is installed on the top of the side blocking mechanism, the mode of dual purposes of suction and internal treatment and external discharge is adopted, physical blocking is added, the content of metal powder can be effectively and continuously controlled in the printing process, the metal powder is prevented from severely diffusing in the printer body, and the printing quality is improved. Therefore, a series of bad influences such as interference on the laser head and blockage of gaps of the printer body are eliminated as much as possible, and the safety performance is ensured while the excellent printing effect is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of metal powder processing, and in particular to a cavity box for a laser 3D printer. Background Art

[0002] Laser sintering 3D printers use the principle of sintering powdered materials under laser irradiation, and selectively sinter according to interface profile information under computer control, and stack up layer by layer to form. Laser sintering 3D printing technology uses powdered materials. Theoretically, any fusible powder can be used to make models, and the manufactured models can be used as real prototype components.

[0003] The printing process of laser 3D printing is mainly completed in the printing chamber. The working environment in the printing chamber affects the quality of the printing effect. During the printing process, the metal powder produced by printing will diffuse and pollute the printing space in the printing chamber, interfere with the irradiation effect of the laser head, block the gap of the printer, and cause a series of adverse effects, ultimately leading to poor printing effects. At the same time, once the metal powder in the printer reaches a certain concentration, it is very easy to burn and explode.

[0004] Most of the existing laser 3D printer cavity boxes adopt an open design. Although it is convenient for operators to observe the printing process, it will cause metal powder to spread wantonly and easily enter the operator's lungs or mucous membranes, endangering their health. In addition, although some 3D printer cavity boxes have been improved and equipped with ventilation devices, air is introduced to dilute the dust content in the cavity, this method often has only a single ventilation hole, the ventilation effect is poor, and cannot meet safety requirements well. Summary of the invention

[0005] The purpose of the present invention is to provide a cavity box for a laser 3D printer to solve the above problems.

[0006] In order to achieve the above-mentioned object, the present invention provides a cavity box for a laser 3D printer, comprising: a printer body, a molding platform, a side stop mechanism, a flow purification part, a suction device and an adsorption mechanism; The molding platform is arranged in the printer body, the side stop mechanism is arranged on the inner side wall of the printer body, and the side stop mechanism is located around the molding platform, the flow purification part is arranged on the printer body and the side stop mechanism, the suction device is installed on the side stop mechanism, and the adsorption mechanism is installed on the top of the side stop mechanism, wherein The side blocking mechanism is suitable for forming a fixed-point enclosure to prevent the metal powder from scattering; Driving the flow purification unit can form a circulating airflow in the printer body to carry out the metal powder; The side baffle mechanism includes a positioning frame, a first baffle, a second baffle and a third baffle; The three groups of positioning frames are respectively installed on the three inner side walls of the printer body, and the first baffle, the second baffle and the third baffle are respectively clamped on the three groups of positioning frames.

[0007] Further, the flow purification part includes an L-shaped plate, a fan, an air delivery pipe, a transfer bellows, an air blowing channel, a guide vane, an air inlet channel, a purification channel, an interlayer, activated carbon and an external exhaust pipe; The L-shaped plate and the transfer bellows are installed on the outside of the printer body, the fan is installed on the L-shaped plate, one end of the air supply pipe is connected to the air outlet of the fan, and the other end of the air supply pipe is connected to the transfer bellows, the blowing channel is connected to the transfer bellows, and the blowing channel passes through the printer body and the first baffle, and is tightly attached to the first baffle in a parallel posture, the three guide plates are arc-shaped and circumferentially installed at the tail of the first baffle, the second baffle and the third baffle, the air inlet channel and the purification channel are installed on the inner side wall of the printer body, and the air inlet channel and the purification channel are connected, the interlayer is arranged in the purification channel, a number of the activated carbons are filled between the interlayers, and the external exhaust pipe is connected to the purification channel and extends to the outside of the printer body.

[0008] Further, the suction device includes a suction channel and a transmission tube; The three suction channels are respectively connected to the ends of the first baffle, the second baffle and the third baffle, and one end of three groups of transmission tubes passes through the printer body and is respectively connected to the three suction channels; The other ends of the three groups of transmission tubes are gathered together to the external device connecting pipe and connected to the external vacuum cleaner through the external device connecting pipe.

[0009] Further, the adsorption mechanism includes a metal sheet and a wire; The three metal sheets are detachably mounted on the top of the first baffle, the second baffle and the third baffle respectively, and the three groups of wires are connected to the three metal sheets respectively.

[0010] Furthermore, the suction device further comprises a terraced suction port connected to the three suction channels, and a plurality of round through holes are respectively provided on both sides of the three terraced suction ports; The three terrace-shaped suction ports are arranged in a counterclockwise direction.

[0011] Furthermore, the flow purification unit also includes a guide plate obliquely installed on the air inlet channel.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The cavity box for the laser 3D printer can form a fixed barrier layer between the printer body and the molding platform through the side blocking mechanism, so as to block the metal powder by the side blocking mechanism, thereby preliminarily preventing the metal powder from entering the gap of the printer body; The cavity box for the laser 3D printer can continuously infuse fresh air into the printer body through the flow purification unit, and can form a swirling circulating airflow at the edge of the printer body, so that the air in the printer body can be continuously circulated, thereby entraining the metal powder and taking it out, effectively diluting the dust content of the metal powder. In addition, the flow purification unit can purify the metal powder in the process of discharging it, thereby effectively preventing the operator from inhaling the metal powder and causing harm to the health; The cavity box for the laser 3D printer can generate negative pressure through the suction device to continuously suck metal powder in the middle of the side baffle mechanism, thereby sucking the fine metal powder that is not taken out by the flow purification part away from the printer body. At the same time, the metal powder that floats upward can be adsorbed above the side baffle mechanism through the adsorption mechanism, thereby reducing the metal powder content and further preventing the metal powder from entering the gap of the printer body. The cavity box for the laser 3D printer adopts a dual-purpose suction, internal treatment and external exhaust method for physical isolation. It can effectively and continuously control the content of metal powder during the printing process to prevent it from being seriously diffused in the printer body, thereby eliminating a series of adverse effects such as interference with the laser head and blocking the gaps of the printer body as much as possible, thereby ensuring safety performance while ensuring excellent printing effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 A perspective view of the present invention is shown; Figure 2 A partial top view of the present invention is shown; Figure 3 A partial perspective view of the present invention is shown; Figure 4 Another partial perspective view of the present invention is shown; Figure 5 The present invention is shown Figure 1 A magnified image of point A; Figure 6 The present invention is shown Figure 2 A magnified view of point B; Figure 7 The present invention is shown Figure 3 Enlarged view of point C; Figure 8 The present invention is shown Figure 3 Enlarged view of point D.

[0015] In the figures, the same reference numerals denote the same structural elements, wherein: 1. Printer body; 2. Forming platform; 3. Side baffle mechanism; 31. Positioning frame; 32. First baffle plate; 33. Second baffle plate; 34. Third baffle plate; 4. Flow purification unit; 41. L-shaped plate; 42. Fan; 43. Air duct; 44. Transfer bellows; 45. Blowing channel; 46. Guide plate; 47. Air inlet channel; 48. Purification channel; 49. Interlayer; 491. Activated carbon; 492. External exhaust pipe; 493. Guide plate; 5. Suction device; 51. Suction channel; 52. Transmission pipe; 53. Step-shaped suction port; 54. Round through hole; 6. Adsorption mechanism; 61. Metal sheet; 62. Wire. DETAILED DESCRIPTION

[0016] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0017] See also Figure 1 , Figure 1 A perspective view of the present invention is shown; see Figure 2 , Figure 2 A partial top view of the present invention is shown; see Figure 3 , Figure 3 A partial perspective view of the present invention is shown; see Figure 4 , Figure 4 Another partial perspective view of the present invention is shown; see Figure 5 , Figure 5 The present invention is shown Figure 1 See the enlarged view of point A in Figure 6 , Figure 6 The present invention is shown Figure 2 See the enlarged view of point B in Figure 7 , Figure 7 The present invention is shown Figure 3 See the enlarged view of point C in Figure 8 , Figure 8 The present invention is shown Figure 3 The enlarged picture of D; Figure 1-8 As shown, a cavity box for a laser 3D printer includes: a printer body 1, a molding platform 2, a side blocking mechanism 3, a flow purification part 4, a suction device 5 and an adsorption mechanism 6; The molding platform 2 is arranged in the printer body 1, the side stop mechanism 3 is arranged on the inner side wall of the printer body 1, and the side stop mechanism 3 is located around the molding platform 2, the flow purification unit 4 is arranged on the printer body 1 and the side stop mechanism 3, the suction device 5 is installed on the side stop mechanism 3, and the adsorption mechanism 6 is installed on the top of the side stop mechanism 3, wherein The side blocking mechanism 3 is suitable for forming a fixed-point enclosure to prevent the metal powder from scattering; Driving the flow purification unit 4 can form a circulating airflow in the printer body 1 to carry out the metal powder; The cavity box for the laser 3D printer can form a fixed barrier layer between the printer body 1 and the forming platform 2 through the side blocking mechanism 3, so as to use the side blocking mechanism 3 to block the metal powder, thereby preliminarily preventing the metal powder from entering the gap of the printer body 1. The flow purification unit 4 can continuously infuse fresh air into the printer body 1, and at the same time, a swirling circulating airflow can be formed at the edge of the printer body 1, so that the air in the printer body 1 continues to circulate, and the metal powder is carried out, effectively diluting the dust content of the metal powder. In addition, the flow purification unit 4 can purify the metal powder in the process of discharging it, thereby effectively preventing the operator from inhaling the metal powder and causing harm to the health. The device 5 can generate negative pressure to continuously suck metal powder in the middle of the side baffle mechanism 3, thereby sucking the fine metal powder that is not taken out by the flow purification unit 4 away from the printer body 1. At the same time, the metal powder that floats upward can be adsorbed above the side baffle mechanism 3 by the adsorption mechanism 6, thereby reducing the content of metal powder and further preventing the metal powder from entering the gap of the printer body 1. The cavity box for the laser 3D printer adopts a dual-purpose suction and internal treatment and external discharge method for physical isolation, which can effectively and continuously control the content of metal powder during the printing process and prevent it from being seriously diffused in the printer body, thereby eliminating a series of adverse effects such as interference with the laser head and blocking the gap of the printer body as much as possible, thereby ensuring safety performance while ensuring excellent printing effects; The side baffle mechanism 3 includes a positioning frame 31, a first baffle 32, a second baffle 33 and a third baffle 34; The three groups of positioning frames 31 are respectively installed on the three inner walls of the printer body 1, and the first baffle 32, the second baffle 33 and the third baffle 34 are respectively clamped on the three groups of positioning frames 31, providing an installation basis for the flow purification part 4 and the suction device 5, ensuring that they can be fixed in the printer body 1 according to the predetermined position to perform the existing functions.

[0018] Optionally, the flow purification unit 4 includes an L-shaped plate 41, a fan 42, an air delivery pipe 43, a transfer bellows 44, an air blowing channel 45, a guide plate 46, an air inlet channel 47, a purification channel 48, an interlayer 49, activated carbon 491 and an external exhaust pipe 492; The L-shaped plate 41 and the transfer bellows 44 are mounted on the outside of the printer body 1, the fan 42 is mounted on the L-shaped plate 41, one end of the air supply pipe 43 is connected to the air outlet of the fan 42, and the other end of the air supply pipe 43 is connected to the transfer bellows 44, the blowing channel 45 is connected to the transfer bellows 44, and the blowing channel 45 passes through the printer body 1 and the first baffle 32, and is closely attached to the first baffle 32 in a parallel posture, and the three guide plates 46 are arc-shaped and circumferentially mounted on the first baffle 32, the second baffle 33 and the At the rear of the third baffle 34, the air inlet channel 47 and the purification channel 48 are installed on the inner side wall of the printer body 1, and the air inlet channel 47 and the purification channel 48 are connected, the interlayer 49 is arranged in the purification channel 48, and a plurality of the activated carbons 491 are filled between the interlayers 49, and the external exhaust pipe 492 is connected to the purification channel 48 and extends to the outside of the printer body 1. When printing is in progress, the fan 42 is driven to start blowing air, and the air is transported to the transfer bellows 44 through the air delivery pipe 43, and then the air is blown close to the first The air is blown out by the baffle 32, and the wind direction is changed several times under the guidance of the three guide plates 46 and the action of the second baffle 33 and the third baffle 34, and finally enters the air inlet channel 47 and the purification channel 48, and then is discharged to the outside through the external exhaust pipe 492, so as to form a circulating and continuous airflow in the printer body 1, so that the internal air circulates continuously, and the metal powder generated by printing is taken out, thereby effectively suppressing the content of the metal powder, preventing the metal powder from being excessively diffused in the printer body 1, thereby preventing interference with the laser irradiation effect of the printer body 1, and preventing The metal powder will clog the internal gaps of the printer body 1 and can also effectively avoid combustion and explosion, thereby ensuring the printing effect while reducing the risk. When the airflow carries the metal powder into the purification channel 48 and passes through the interlayer 49 and the activated carbon 491 therein, the metal powder in the airflow will be immediately adsorbed by the activated carbon 491 after contacting the activated carbon 491, and then the airflow containing the metal powder will be discharged outward after purification, thereby effectively preventing the metal powder from diffusing into the external working space, thereby preventing the operator from inhaling the metal powder and protecting the operator's health.

[0019] Optionally, the suction device 5 includes a suction channel 51 and a transmission tube 52; The three suction channels 51 are respectively connected to the ends of the first baffle 32, the second baffle 33 and the third baffle 34, and one end of three groups of transmission tubes 52 passes through the printer body 1 and is respectively connected to the three suction channels 51; The other ends of the three groups of transmission tubes 52 are gathered to the external pipe and connected to the external vacuum cleaner through the external pipe. When printing is in progress, the external vacuum cleaner is started to start suction, and the three suction channels 51 are successively made into a negative pressure state through the external pipe and the three groups of transmission tubes 52, so as to realize continuous suction of metal powder between the first baffle 32, the second baffle 33 and the third baffle 34, and suck away the metal powder that cannot be discharged and retained by the flow purification unit 4, and then cooperate with the flow purification unit 4 to improve the function of suppressing the metal powder content, and further prevent the metal powder from entering the gap in the printer body 1 and causing blockage.

[0020] Optionally, the adsorption mechanism 6 includes a metal sheet 61 and a wire 62; The three metal sheets 61 are detachably mounted on the top of the first baffle 32, the second baffle 33 and the third baffle 34, respectively. The three groups of wires 62 are connected to the three metal sheets 61, respectively, and the three groups of wires 62 are all connected to an external power source. When printing is in progress, the external power source is turned on, so that the current passes through the three groups of wires 62 and reaches the three metal sheets 61 respectively, so that they are attached with weak static electricity, thereby absorbing the metal powder that escapes from the airflow flow area of ​​the flow purification part 4 and continues to float upward above the side baffle mechanism 3, so that it sticks to the three metal sheets 61 and cannot move, and controls its continued diffusion, thereby further preventing the metal powder from entering the gap in the printer body 1 and causing blockage.

[0021] Optionally, the suction device 5 further includes a terraced suction port 53 connected to the three suction channels 51, and a plurality of round through holes 54 are respectively provided on both sides of the three terraced suction ports 53; The three terraced suction ports 53 are arranged in a counterclockwise direction, and the three terraced suction ports 53 are used to increase the negative pressure area, thereby expanding the suction area. At the same time, the circular through holes 54 on both sides of the terraced suction ports 53 ensure that the metal powder located on the sides of the terraced suction ports 53 and the suction channel 51 can be sucked away, ensuring the comprehensiveness of the suction angle and range and avoiding dead corners.

[0022] Optionally, the flow purification unit 4 also includes a guide plate 493 obliquely installed on the air inlet channel 47 to ensure that the airflow carrying the metal powder can enter the air inlet channel 47 along a predetermined route under the obstruction and guidance of the guide plate 493, thereby preventing the airflow carrying the metal powder from failing to enter the air inlet channel 47 due to the inlet of the air inlet channel 47 being too narrow and continuing to float in the printer body 1.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cavity box for a laser 3D printer, characterized in that: include: A printer body (1), a molding platform (2), a side blocking mechanism (3), a flow purification unit (4), a suction device (5) and an adsorption mechanism (6); The molding platform (2) is arranged in the printer body (1), the side stop mechanism (3) is arranged on the inner side wall of the printer body (1), and the side stop mechanism (3) is located around the molding platform (2), the flow purification unit (4) is arranged on the printer body (1) and the side stop mechanism (3), the suction device (5) is installed on the side stop mechanism (3), and the adsorption mechanism (6) is installed on the top of the side stop mechanism (3), wherein The side blocking mechanism (3) is suitable for forming a fixed-point enclosure to prevent metal powder from scattering; Driving the flow purification unit (4) can form a circulating airflow in the printer body (1) to entrain and carry out the metal powder; The side baffle mechanism (3) comprises a positioning frame (31), a first baffle (32), a second baffle (33) and a third baffle (34); The three groups of positioning frames (31) are respectively mounted on three inner side walls of the printer body (1); the first baffle (32), the second baffle (33) and the third baffle (34) are respectively clamped on the three groups of positioning frames (31).

2. A cavity box for a laser 3D printer as claimed in claim 1, characterized in that: The flow purification section (4) comprises an L-shaped plate (41), a fan (42), an air delivery pipe (43), a transfer bellows (44), an air blowing channel (45), a guide plate (46), an air inlet channel (47), a purification channel (48), an interlayer (49), activated carbon (491) and an external exhaust pipe (492); The L-shaped plate (41) and the transfer bellows (44) are mounted on the outside of the printer body (1), the fan (42) is mounted on the L-shaped plate (41), one end of the air supply pipe (43) is connected to the air outlet of the fan (42), the other end of the air supply pipe (43) is connected to the transfer bellows (44), the blowing channel (45) is connected to the transfer bellows (44), and the blowing channel (45) passes through the printer body (1) and the first baffle (32) and is closely attached to the first baffle (32) in a parallel posture, and the three guide plates (46) are connected to the printer body (1) and the first baffle (32). ) is arc-shaped and circumferentially mounted on the tail of the first baffle (32), the second baffle (33) and the third baffle (34), the air inlet channel (47) and the purification channel (48) are mounted on the inner wall of the printer body (1), and the air inlet channel (47) and the purification channel (48) are connected, the interlayer (49) is arranged in the purification channel (48), a plurality of the activated carbons (491) are filled between the interlayers (49), and the external exhaust pipe (492) is connected to the purification channel (48) and extends to the outside of the printer body (1).

3. A cavity box for a laser 3D printer as claimed in claim 2, characterized in that: The suction device (5) comprises a suction channel (51) and a transmission tube (52); The three suction channels (51) are respectively connected to the ends of the first baffle (32), the second baffle (33) and the third baffle (34); one end of three groups of transmission tubes (52) passes through the printer body (1) and are respectively connected to the three suction channels (51); The other ends of the three groups of transmission tubes (52) are gathered together to the external device connecting pipe and connected to the external vacuum cleaner through the external device connecting pipe.

4. A cavity box for a laser 3D printer as claimed in claim 3, characterized in that: The adsorption mechanism (6) comprises a metal sheet (61) and a wire (62); The three metal thin plates (61) are respectively detachably mounted on the top of the first baffle (32), the second baffle (33) and the third baffle (34), and the three groups of wires (62) are respectively connected to the three metal thin plates (61).

5. A cavity box for a laser 3D printer as claimed in claim 4, characterized in that: The suction device (5) further comprises a terraced suction port (53) connected to the three suction channels (51), and a plurality of circular through holes (54) respectively provided on both sides of the three terraced suction ports (53); The three terrace-shaped suction ports (53) are arranged in a counterclockwise direction.

6. A cavity box for a laser 3D printer as claimed in claim 5, characterized in that: The flow purification unit (4) further comprises a guide plate (493) obliquely mounted on the air inlet channel (47).

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