Multi-laser 3D printing equipment

Abstract

The invention discloses multi-laser 3D printing equipment. The multi-laser 3D printing equipment comprises an additive forming bin; a forming assembly is arranged above the additive forming bin, and the additive forming bin can be connected with the forming assembly in a sealed mode. The additive forming bin is arranged on the conveying assembly and can slide on the conveying assembly. The conveying assembly is arranged on the rack; a powder cleaning assembly is arranged on one side of the additive forming bin; the additive forming bin comprises a forming bin body and a forming assembly arranged in the forming bin body, the forming assembly is connected with the lifting assembly, the lifting assembly can drive the forming assembly to ascend and descend in the forming bin body, and the forming bin body is connected with the lifting assembly in a sealed mode. The forming bin has the beneficial effects that the sealing performance of the forming bin body can be improved due to the fact that the forming bin body is connected with the lifting assembly in a sealed mode, only the forming bin body needs to be subjected to gas washing during gas washing, the space occupied by the lifting assembly is reduced, particles generated by sintering are not prone to entering the connecting part of the forming bin body and the lifting assembly, and the sintering efficiency is improved. And finally, the service life of the lifting assembly is prolonged.

Description

Technical Field

[0001] The present application relates to the field of 3D printing equipment, and in particular to a multi-laser 3D printing equipment. Background Art

[0002] The additive molding chamber in the prior art is an independent chamber that needs to be purged after 3D printing. The so-called purging is to extract the inert gas in the molding chamber and at the same time absorb the particulate matter generated by sintering in the molding chamber. Since the printed substrate in the molding chamber needs to be raised and lowered in the chamber, it is necessary to take good sealing measures between the molding chamber and the lifting assembly. In the prior art, the space where the lifting assembly is located is generally separated into a chamber connected to the molding chamber, and the two chambers are washed together during purging. Since the two chambers need to be purged, more gas is consumed during purging; in addition, the lifting assembly being an independent chamber will also occupy a larger usable space; the most important thing is that the particulate matter in the molding chamber will enter the connection part between the molding chamber and the lifting assembly, causing the lifting assembly to be blocked, affecting the service life of the lifting assembly. Summary of the Invention

[0003] The purpose of the present invention is to propose a multi-laser 3D printing device to solve the problems in the prior art of the additive manufacturing chamber being relatively gas-consuming to wash, the lifting components occupying a large space, and the lifting components having a short service life.

[0004] A multi-laser 3D printing device includes an additive molding chamber; a molding assembly is provided above the additive molding chamber, and the additive molding chamber can be sealed and connected to the molding assembly; the additive molding chamber is provided on a transport assembly and can slide on the transport assembly; the transport assembly is provided on a frame; a powder cleaning assembly is provided on one side of the additive molding chamber;

[0005] The additive molding chamber includes a molding chamber body and a support assembly arranged in the molding chamber body. The support assembly is connected to the lifting assembly. The lifting assembly can drive the support assembly to rise and fall in the molding chamber body. The molding chamber body is sealed with the lifting assembly.

[0006] The beneficial effects are: the sealed connection between the molding bin body and the lifting assembly can improve the sealing of the molding bin body, and during air washing, only the molding bin body needs to be washed, which reduces the space occupied by the lifting assembly. In addition, the particles generated by sintering are not easy to enter the connection part between the molding bin body and the lifting assembly, thereby ultimately improving the service life of the lifting assembly.

[0007] In some embodiments, the lifting assembly includes a plurality of guide rods connected to the support assembly, a first driving device for driving the guide rods to move up and down, and a fixing plate connected to the guide rods;

[0008] A sealing assembly is provided between each guide rod and the forming bin body. The sealing assembly includes

[0009] A sealing member is sealingly connected between the upper end surface of the bottom of the molding bin body and the guide rod, and the sealing member is sleeved on the guide rod;

[0010] The shaft sleeve is sealed and connected between the lower end surface of the bottom of the molding bin body and the guide rod.

[0011] The beneficial effect is that the sealing member can prevent particles from entering the connection portion between the printing chamber and the guide rod from the inside of the printing chamber.

[0012] In some embodiments, the molding assembly includes a printing chamber, which is provided with a powder storage box connected to the printing chamber, and the powder storage box is located on one side of the printing chamber; a powder dropping assembly is provided in the printing chamber, and a transfer plate is provided between the powder storage box and the powder dropping assembly; the dropping port of the powder storage box is connected to one end of the transfer plate, and the powder dropping assembly includes a feed port and a discharge port, and the feed port is connected to the other end of the transfer plate; a scraper assembly and a scraper driving device for driving the scraper assembly to move are provided in the printing chamber; a laser assembly is also provided on the printing chamber.

[0013] The beneficial effect is that the operator can add powder to the powder storage box at any time without having to shut down the entire equipment to complete the powder addition, thereby improving the overall printing efficiency of the equipment.

[0014] In some embodiments, the scraper assembly includes a support frame, a first scraper and a second scraper, a powder storage chamber is formed between the first scraper and the second scraper, the first scraper and the second scraper are connected to the support frame, and the powder in the powder falling assembly can fall into the powder storage chamber from the discharge port.

[0015] The beneficial effect is that the scraper assembly can complete two powder spreading and powder scraping operations in one reciprocating stroke of the scraper, thereby improving the efficiency of the scraper stroke operation.

[0016] In some embodiments, the powder cleaning component includes a powder cleaning bin having an opening at the bottom thereof;

[0017] Ventilation holes, at least one vent is provided on the powder cleaning bin;

[0018] The air outlet pipe is connected to the vent and can penetrate into the powder cleaning bin and is located above the opening;

[0019] The powder collecting device is located at the bottom of the powder cleaning bin.

[0020] The beneficial effect is that the gas blown out from the air outlet pipe can clean the dust remaining in the powder cleaning bin after sintering, and the dust will be blown into the powder collecting device for collection, and finally the powder cleaning bin will be restored to cleanliness.

[0021] In some embodiments, a first airflow integration device is further provided on one side of the printing chamber, the first airflow integration device including a first air outlet portion, a first air inlet and a first air outlet are respectively provided at both ends of the first air outlet portion, and the first air inlet and the first air outlet are communicated with each other;

[0022] A plurality of first partitions are provided between the first air inlet and the first air outlet, and the first partitions separate the air outlet portion into a plurality of first air outlet channels;

[0023] The first air outlet is connected to a first air outlet plate, and a plurality of first air outlets are arranged in an array on the first air outlet plate, and the areas of the first air outlets decrease sequentially from bottom to top.

[0024] Its beneficial effects are: the air flow can remove by-products under the squeezing of the first air outlet, and when the air flow enters the first air outlet from the first air outlet channel, the air outlet area suddenly decreases, which will produce a squeezing effect on the air flow, among which the air flow velocity at the lowest air outlet of the first air outlet plate is the slowest, and as the area of ​​the first air outlet decreases from bottom to top, the air flow velocity increases successively, and the air flow velocity at the highest air outlet of the first air outlet plate is the fastest.

[0025] In some embodiments, the first partition includes a transverse partition and a vertical partition, and the transverse partition divides the vertical partitions into at least two layers of first air ducts at equal intervals;

[0026] A plurality of vertical partitions divide the first air ducts on each layer into at least two at equal intervals, and each first air duct is connected to a plurality of first air outlet channels.

[0027] The beneficial effect is that the air volume output by each first air outlet channel is equal, and the air volume output by the first air duct on each layer is equal.

[0028] In some embodiments, a second airflow integration device and a third airflow integration device are further provided above the first airflow integration device in the printing chamber.

[0029] Its beneficial effects are: the first airflow integration device can remove by-products slightly higher than the printing format; the second airflow integration device is used to remove by-products in the middle of the printing chamber; and the third airflow integration device can remove by-products before they reach the galvanometer lens.

[0030] In some embodiments, the second airflow integration device comprises:

[0031] A second air outlet, wherein two ends of the second air outlet are respectively provided with a second air inlet and a second air outlet, and the second air inlet and the second air outlet are connected;

[0032] Second partitions, wherein the plurality of second partitions are provided between the second air inlet and the second air outlet, and the plurality of second partitions separate the second air outlet portion into a plurality of second air outlet channels;

[0033] The second air outlet is connected to a second air outlet plate, on which a plurality of second air outlets are arranged in an array, and the areas of the second air outlets decrease sequentially from bottom to top.

[0034] Its beneficial effects are: the air flow can remove by-products under the squeezing of the second air outlet, and when the air flow enters the second air outlet from the second air outlet channel, the air outlet area suddenly decreases, which will produce a squeezing effect on the air flow, among which the air flow velocity at the lowest air outlet of the second air outlet plate is the slowest, and as the area of ​​the second air outlet decreases from bottom to top, the air flow velocity increases successively, and the air flow velocity at the highest air outlet of the second air outlet plate is the fastest.

[0035] In some embodiments, a plurality of second partitions separate the second air outlet portion into a plurality of second air outlet channels with equal air outlet areas; and at least three layers of second air outlets are arranged in an array on the second air outlet plate.

[0036] The beneficial effect is that the air outlet areas of the second air outlet channels are equal, so the air volumes output by each second air outlet channel are equal.

[0037] In some embodiments, the third air flow integration device includes a third air outlet, and the third air outlet is provided between the top of the printing chamber and the plate, and the height of the third air outlet is lower than the galvanometer lens.

[0038] The beneficial effect is that the airflow blown out from the third air outlet can prevent by-products from contaminating the galvanometer lens.

[0039] In some embodiments, an air washing module is connected to the printing chamber; the air washing module includes a vent, an air vent, and an oxygen sensor provided on the printing chamber, the vent can introduce inert gas into the printing chamber, and the air vent can exhaust gas in the printing chamber;

[0040] The vent and the air vent are arranged diagonally opposite to each other in the same plane or space on the printing chamber; an oxygen sensor is provided on one end of the printing chamber close to the air vent for monitoring the oxygen content in the printing chamber.

[0041] Its beneficial effect is that the purge module can replace the inert gas in the sealed printing chamber, providing the necessary gas environment for subsequent printing. Before the 3D printing process, purge is required (introducing inert gas into the printing chamber to replace the existing gas in the printing chamber, so that the oxygen content in the printing chamber reaches the preset value that meets the printing conditions). There is a long distance between the vent and the vent. During purge, the inert gas fully diffuses in the printing chamber, thereby discharging excess oxygen in the printing chamber from the vent. The gas inside the printing chamber can be fully replaced, and the oxygen content in the printing chamber is reduced to the preset value, thereby meeting the basic gas environment for 3D printing, reducing the waste of inert gas in the purge process, improving the purge efficiency, and providing a gas environment that meets the conditions for the 3D printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 This is a schematic structural diagram of a multi-laser 3D printing device in the present invention.

[0044] Figure 2 This is a schematic diagram of the structure of the additive manufacturing chamber.

[0045] Figure 3 for Figure 2 interior view.

[0046] Figure 4 for Figure 3 Partial cross-section of part a.

[0047] Figure 5 for Figure 3 Partial cross-section of part a.

[0048] Figure 6 An internal view of the molded component.

[0049] Figure 7 An internal view of the molded component.

[0050] Figure 8 for Figure 7 Schematic diagram of the structure of the scraper assembly.

[0051] Figure 9 This is an internal view of the powder cleaning assembly.

[0052] Figure 10This is an internal cross-sectional view of the powder cleaning component.

[0053] Figure 11 A cross-sectional view of the interior of a molded component.

[0054] Figure 12 Schematic diagram of the structure of the first airflow integration device.

[0055] Figure 13 Schematic diagram of the structure of the first airflow integration device.

[0056] Figure 14 Schematic diagram of the structure of the second airflow integration device.

[0057] Figure 15 Schematic diagram of the structure of the second airflow integration device.

[0058] Figure 16 It is a structural diagram of the air supply device.

[0059] Figure 17 This is a structural diagram of the air washing module.

[0060] Description of the reference numerals in the accompanying drawings:

[0061] 1. Additive molding chamber; 2. Molding assembly; 3. Transport assembly; 4. Frame; 5. Powder cleaning assembly; 11. Molding chamber; 12. Support assembly; 13. Lifting assembly; 14. Sealing assembly; 21. Print chamber; 22. Powder storage box; 23. Powder drop assembly; 24. Transfer plate; 25. Scraper assembly; 26. Scraper drive unit; 31. Guide rail; 32. Slide gear; 33. Gear; 34. Secondary drive unit; 51. Powder cleaning chamber; 52. Ventilation port; 53. Air outlet duct; 54. Powder collection device; 121. Plate assembly; 122 , base plate; 131, guide rod; 132, first driving device; 133, fixing plate; 141, sealing member; 142, bushing; 221, feeding port; 231, feeding port; 232, discharging port; 233, upper end cover; 234, lower end cover; 235, powder dropping roller; 236, powder dropping driving device; 251, support frame; 252, first scraper; 253, second scraper; 254, powder storage chamber; 511, opening; 541, powder cleaning cover; 542, powder collecting box; 2521, first blade holder; 2522, first blade; 2531, second blade holder; 2532, second blade; 01, second airflow integration device; 02, air supply device; 03, air scrubber module; 04, third airflow integration device; 05, laser assembly; 011, second air outlet; 012, second air inlet; 013, second air outlet; 014, second partition; 015, second air outlet channel; 016, second air outlet plate; 021, first bellows; 022, second bellows; 27, first powder collection assembly; 28, second powder collection assembly; 29, first airflow integration device; 031, vent; 032, air vent; 033, oxygen sensor; 041, third air outlet; 0161, second air outlet; 271, first powder collecting box; 272, first cover plate; 281, second powder collecting box; 282, second cover plate; 291, first air outlet; 292, first air inlet; 293, first air outlet; 294, first partition; 295, first air outlet channel; 296, first air outlet plate; 2941, horizontal partition; 2942, vertical partition; 2943, first air duct; 2961, first air outlet; DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0063] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "two ends", "both sides", "bottom", "top", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", "superior", "inferior", "primary", "secondary", etc. are used for descriptive purposes only and can be simply used to more clearly distinguish different components, but should not be understood as indicating or implying relative importance.

[0064] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0065] like Figures 1-2 As shown,

[0066] A multi-laser 3D printing device comprises: an additive molding chamber 1; a molding assembly 2 is provided above the additive molding chamber 1, and the additive molding chamber 1 can be sealedly connected to the molding assembly 2; the additive molding chamber 1 is provided on a transport assembly 3 and can slide on the transport assembly 3; the transport assembly 3 is provided on a frame 4; a powder cleaning assembly 5 is provided on one side of the additive molding chamber 1;

[0067] The additive molding chamber 1 includes: a molding chamber body 11, and a support assembly 12 arranged in the molding chamber body 11. The support assembly 12 is connected to the lifting assembly 13. The lifting assembly 13 can drive the support assembly 12 to rise and fall in the molding chamber body 11. The molding chamber body 11 is sealed with the lifting assembly 13.

[0068] The beneficial effects are: the sealed connection between the molding bin body 11 and the lifting assembly 13 can improve the sealing of the molding bin body 11. During air washing, only the molding bin body 11 needs to be washed, which reduces the space occupied by the lifting assembly 13. In addition, the particulate matter generated by sintering is not easy to enter the connection part between the molding bin body 11 and the lifting assembly 13, thereby ultimately improving the service life of the lifting assembly 13.

[0069] like Figures 3-5 As shown,

[0070] Preferably, the lifting assembly 13 includes: a plurality of guide rods 131 connected to the support assembly 12, a first driving device 132 for driving the guide rods 131 to move up and down, and a fixing plate 133 connected to the guide rods 131; the first driving device 132 is preferably an electric cylinder in this embodiment.

[0071] A sealing assembly 14 is provided between each guide rod 131 and the molding chamber body 11. The sealing assembly 14 includes:

[0072] The seal 141 is sealed between the upper end surface of the bottom of the molding chamber 11 and the guide rod 131, and the seal 141 is sleeved on the guide rod 131. The seal 141 can withstand a pressure of approximately 0.3 MPa. In this embodiment, the seal 141 is preferably made of polyurethane material;

[0073] For example, the sealing member 141 may preferably be a gasket, a ferrule, a sealing ring or the like;

[0074] The shaft sleeve 142 is sealed between the lower end surface of the bottom of the molding bin body 11 and the guide rod 131.

[0075] The beneficial effect is that the seal 141 can prevent particles from entering the connection portion between the printing chamber 21 and the guide rod 131 from the inside of the printing chamber 21 .

[0076] The support assembly 12 includes:

[0077] The plate group 121 is provided on the fixed plate 133 , wherein the plate group 121 generally includes: but is not limited to: various pressing plates, felts, and heat insulation plates, and mainly uses a combination of multiple different plates to isolate the base plate 122;

[0078] The substrate 122 is disposed on the plate assembly 121 and is used for additive manufacturing. The powder laying and printing processes in 3D printing are all performed on the substrate 122, which is used to support the printed product.

[0079] Preferably, the transport component 3 comprises:

[0080] Guide rail 31, guide rail 31 is provided on the frame 4;

[0081] Sliding teeth 32, which are provided on one side of the guide rail 31;

[0082] Gear 33, gear 33 is connected to the sliding gear 32;

[0083] The second driving device 34 is provided on the transport component 3 , and a driving end of the second driving device 34 is connected to the gear 33 .

[0084] The beneficial effect is that the second driving device 34 drives the gear 33 to rotate, and the gear 33 engages with the sliding gear 32, so that the additive molding chamber 1 can move along the direction of the guide rail 31 to approach or move away from the powder cleaning component 5.

[0085] like Figures 6-8 As shown,

[0086] Preferably, the molding component 2 includes: a printing chamber 21, a powder storage box 22 connected to the printing chamber 21 is provided on the printing chamber 21, and the powder storage box 22 is located above the printing chamber 21; a powder dropping component 23 is provided in the printing chamber 21, and a transfer plate 24 is provided between the powder storage box 22 and the powder dropping component 23; the dropping port 221 of the powder storage box 22 is connected to one end of the transfer plate 24, and the powder dropping component 23 includes: a feed port 231 and a discharge port 232, and the feed port 231 is connected to the other end of the transfer plate 24; a scraper component 25 and a scraper driving device 26 for driving the scraper component 25 to move are provided in the printing chamber 21, and a laser component 05 is also provided on the printing chamber 21.

[0087] The beneficial effect is that the operator can add powder to the powder storage box 22 at any time without having to shut down the entire device to complete the powder addition, thereby improving the overall printing efficiency of the device.

[0088] In some embodiments, the powder dropping assembly 23 further includes:

[0089] The upper end cover 233 is connected to the transfer plate 24;

[0090] The lower end cover 234 is connected to the transfer plate 24 and is located on one side of the upper end cover 233;

[0091] The powder dropping roller 235 is provided between the upper end cover 233 and the lower end cover 234;

[0092] The powder dropping driving device 236 and the driving end of the powder dropping driving device 236 and the powder dropping roller 235 can drive the powder dropping roller 235 to rotate.

[0093] Its beneficial effects are: the powder dropping drive device 236 can drive the powder dropping roller 235 to rotate, so that the powder entering can fall into the powder storage chamber 254 under the drive of the powder dropping roller 235, and the rotating powder dropping roller 235 can drive the powder to rotate; at the same time, the scattered powder will be gathered together first, and then the powder dropping roller 235 will roll to make the powder fall into the powder storage chamber 254 more evenly.

[0094] Preferably, the scraper assembly 25 includes: a support frame 251, a first scraper 252 and a second scraper 253, a powder storage chamber 254 is formed between the first scraper 252 and the second scraper 253, the first scraper 252 and the second scraper 253 are connected to the support frame 251, and the powder in the powder falling assembly 23 can fall into the powder storage chamber 254 from the discharge port 232.

[0095] The beneficial effect is that the scraper assembly 25 can complete two powder spreading and powder scraping operations in one reciprocating stroke of the scraper, thereby improving the efficiency of the scraper stroke operation.

[0096] Preferably, the first scraper 252 comprises:

[0097] A first knife seat 2521, the first knife seat 2521 is connected to the support frame 251;

[0098] A first blade 2522 , the first blade 2522 is connected to the first blade seat 2521 ;

[0099] The second scraper 253 includes:

[0100] A second tool holder 2531, the second tool holder 2531 is connected to the support frame 251;

[0101] The second blade 2532 is connected to the second blade seat 2531 .

[0102] In some embodiments, the bottom of the printing chamber 21 is connected to a first powder collecting assembly 27 , and the first powder collecting assembly 27 is located on one side of the opening 511 .

[0103] The beneficial effect is that after the return stroke and the second powder spreading stroke, the scraper assembly 25 can move the dust on the printing surface to the first powder collecting assembly 27 for powder collection.

[0104] In some embodiments, the bottom of the printing chamber 21 is connected to a first powder collecting assembly 27 .

[0105] The beneficial effect is that after completing the first powder spreading stroke, the scraper assembly 25 can move the dust on the printing surface to the first powder collecting assembly 27 for powder collection.

[0106] In some embodiments, the first powder collection assembly 27 includes:

[0107] A first powder collecting box 271 , the first powder collecting box 271 is connected to the printing chamber 21 ;

[0108] The first cover plate 272 is provided at the connection between the first powder collecting box 271 and the printing chamber 21 .

[0109] In some embodiments, the bottom of the printing chamber 21 is connected to a second powder collecting assembly 28 .

[0110] The beneficial effect is that after completing the second powder spreading stroke, the scraper assembly 25 can move the dust on the printing surface to the second powder collecting assembly 28 for powder collection.

[0111] In some embodiments, the second powder collection assembly 28 includes:

[0112] A second powder collecting box 281, which is connected to the printing chamber 21;

[0113] The second cover plate 282 is provided at the connection between the second powder collecting box 282 and the printing chamber 21 .

[0114] The following is the specific usage of the molding component 2:

[0115] First, the scraper assembly 25 moves to the bottom of the powder dropping assembly 23, and the powder in the powder dropping assembly 23 falls into the powder storage chamber 254 of the scraper assembly 25 under the driving of the powder dropping roller 235 therein; Figure 6 The scraper assembly 25 moves (with the left and right directions of the image as a reference) across the printing surface, completing the first powder scraping and first powder spreading strokes, and moving the remaining powder on the printing surface to the first powder collecting assembly 27 for collection. The galvanometer in the molding assembly 2 prints, and after printing is completed, the scraper assembly 25 moves rightward to cross the printing surface, completing the second powder scraping and second powder spreading strokes, and moving the remaining powder on the printing surface to the second powder collecting assembly 28 for collection. The scraper assembly 25 continuously reciprocates in the left and right directions, and when the powder in the powder storage chamber 254 is insufficient, it moves to the position directly below the powder dropping assembly 23 to add powder.

[0116] like Figure 6 、 17 As shown:

[0117] The laser assembly 05 includes a laser 051 , which has a galvanometer lens, and the galvanometer lens faces the inside of the printing chamber 21 .

[0118] like Figures 9-10 As shown,

[0119] Preferably, the powder cleaning component 5 includes: a powder cleaning bin 51, the bottom of which is provided with an opening 511;

[0120] Ventilation holes 52, at least one ventilation hole 52 is provided on the powder cleaning bin 51;

[0121] The air outlet pipe 53 is connected to the vent 52 and is able to penetrate into the powder cleaning bin 51 and is located above the opening 511;

[0122] The powder collecting device 54 is disposed at the bottom of the powder cleaning bin 51 .

[0123] The beneficial effect is that the gas blown out from the air outlet pipe 53 can clean the dust remaining after sintering in the powder cleaning bin 51, and the dust will be blown into the powder collecting device 54 for collection, eventually restoring the powder cleaning bin 51 to cleanliness.

[0124] like Figures 11-13 As shown,

[0125] Preferably, a first air flow integration device 29 is further provided on one side of the printing chamber 21. The first air flow integration device 29 is located above the printing surface and includes: a first air outlet 291, with a first air inlet 292 and a first air outlet 293 respectively provided at both ends of the first air outlet 291, and the first air inlet 292 and the first air outlet 293 are connected;

[0126] A plurality of first partitions 294 are provided between the first air inlet 292 and the first air outlet 293 . The first partitions 294 separate the first air outlet portion 291 into a plurality of first air outlet channels 295 .

[0127] The first air outlet 293 is connected to a first air outlet plate 296 , and a plurality of first air outlets 2961 are arranged in an array on the first air outlet plate 296 . The areas of the first air outlets 2961 decrease from bottom to top.

[0128] The beneficial effect is that the airflow can remove by-products under the squeezing of the first air outlet 2961, and when the airflow enters the first air outlet 2961 from the first air outlet channel 295, the air outlet area suddenly decreases, which will produce a squeezing effect on the airflow, among which the airflow velocity at the first air outlet 2961 at the bottom of the first air outlet plate 296 is the slowest, and as the area of ​​the first air outlet 2961 decreases from bottom to top, the airflow velocity increases successively, and the airflow velocity at the air outlet at the top of the first air outlet plate 2961 is the fastest.

[0129] Preferably, the first partition 294 includes: a transverse partition 2941 and a vertical partition 2942, wherein the transverse partition 2941 divides a plurality of vertical partitions 2942 into at least two layers of first air ducts 2943 at equal intervals;

[0130] Several vertical partitions 2942 are evenly spaced to separate the first air duct 2943 of each layer into at least two.

[0131] The beneficial effect is that the air volume output by each first air outlet channel 295 is equal, and the air volume output by the first air duct on each layer is equal.

[0132] Preferably, at least four layers of first air outlets 2961 are arrayed on the first air outlet plate 296, and the air outlet areas of any two first air outlets 2961 in each layer are equal, wherein the first air outlets 2961 in the upper two layers are connected to the first air ducts of one layer, and the first air outlets 2961 in the lower two layers are connected to the first air ducts of another layer.

[0133] The air outlet areas of any two first air outlets 2961 in each layer are equal, so the air outlets in each layer can have the same air flow outlet speed.

[0134] like Figure 11 、 14 As shown in ~15,

[0135] Preferably, a second airflow integration device 01 and a third airflow integration device 04 are provided above the first airflow integration device 29 in the printing chamber 21. The first airflow integration device 29, the second airflow integration device 01, and the third airflow integration device 04 are all provided on the same plate in the printing chamber 21.

[0136] Its beneficial effects are: the first airflow integration device 29 can remove by-products slightly higher than the printing format; the second airflow integration device 01 is used to remove by-products in the middle of the printing chamber 21; and the third airflow integration device 04 can remove the by-products before they reach the galvanometer lens.

[0137] Preferably, the second airflow integration device 01 includes:

[0138] A second air outlet 011, with a second air inlet 012 and a second air outlet 013 respectively provided at both ends of the second air outlet 011, and the second air inlet 012 and the second air outlet 013 are connected;

[0139] Second partitions 014 , a plurality of second partitions 014 are provided between the second air inlet 012 and the second air outlet 013 , and the plurality of second partitions 014 separate the second air outlet portion 011 into a plurality of second air outlet channels 015 ;

[0140] The second air outlet 013 is connected to a second air outlet plate 016 , and a plurality of second air outlets 0161 are arranged in an array on the second air outlet plate 016 . The areas of the second air outlets 0161 decrease from bottom to top.

[0141] Its beneficial effects are: the air flow can remove by-products under the squeezing of the second air outlet 0161, and when the air flow enters the second air outlet 0161 from the second air outlet channel 015, the air outlet area suddenly decreases, which will produce a squeezing effect on the air flow, among which the air flow velocity at the second air outlet 0161 at the bottom of the second air outlet plate 016 is the slowest, and as the area of ​​the second air outlet 0161 decreases from bottom to top, the air flow velocity increases successively, and the air flow velocity at the second air outlet 0161 at the top of the second air outlet plate 016 is the fastest.

[0142] Preferably, a plurality of second partitions 014 separate the second air outlet portion 011 into a plurality of second air outlet channels 015 with equal air outlet areas; and at least three layers of second air outlets are arranged in an array on the second air outlet plate 016 .

[0143] The beneficial effect is that the air outlet areas of the second air outlet channels 015 are equal, so the air volumes output by each second air outlet channel 015 are equal.

[0144] Preferably, the third air flow integration device 04 includes: a third air outlet 041, and the third air outlet 041 is provided between the top of the printing chamber 21 and the plate. The height of the third air outlet 041 is lower than the galvanometer lens.

[0145] The beneficial effect is that the airflow blown out from the third air outlet 041 can prevent by-products from contaminating the galvanometer lens.

[0146] It should be noted that the first airflow integration device 29, the second airflow integration device 01, and the third airflow integration device 04 all blow out inert gas. The majority of byproducts (splashing particles and dust) generated by printing in the print chamber 21 are removed by the first airflow integration device 29. The second airflow integration device 01 assists the first airflow integration device 29 by removing the minor byproducts that are not removed by the first airflow integration device 29. The third airflow integration device 04 primarily removes dust that approaches the galvanometer lens to prevent contamination.

[0147] like Figure 16 As shown,

[0148] Preferably, the first airflow integration device 29 and the second airflow integration device 01 are connected to the air supply device 02. The air supply device 02 includes: a first bellows 021 and a second bellows 022 provided on the printing chamber 21. The first bellows 021 and the second bellows 022 are connected by a pipe. The first bellows 021 is connected to the first airflow integration device 29, and the second bellows 022 is connected to the second airflow integration device 01.

[0149] It should be noted that it is not necessary for the first bellows 021 and the second bellows 022 to be connected through a pipeline. In another embodiment, the first bellows 021 and the second bellows 022 can be independently arranged, that is, the first airflow integration device 29 and the second airflow integration device 01 respectively use independent air supply devices 02.

[0150] like Figure 17 As shown,

[0151] Preferably, the air washing module 03 is connected to the printing chamber 21. The air washing module 03 includes: a vent 031, an air release port 032 and an oxygen sensor 033 provided on the printing chamber 21. The vent 031 can allow inert gas to enter, and the air release port 032 can discharge the gas in the printing chamber 21.

[0152] The vent 031 and the air vent 032 are arranged diagonally opposite to each other in the same plane or space on the printing chamber 21; an oxygen sensor 033 is provided on the end of the printing chamber 21 near the air vent 032 for monitoring the oxygen content in the printing chamber 21.

[0153] Its beneficial effect is: the washing module 03 can replace the inert gas in the printing chamber 21 after sealing, providing the necessary gas environment for subsequent printing. Before the 3D printing process, washing is required (introducing inert gas into the printing chamber 21 to replace the existing gas in the printing chamber 21, so that the oxygen content in the printing chamber 21 reaches a preset value that meets the printing conditions). There is a long distance between the vent 031 and the air vent 032. During washing, the inert gas is fully diffused in the printing chamber 21, thereby discharging excess oxygen in the printing chamber 21 from the air vent 032. The gas inside the printing chamber 21 can be fully replaced, and the oxygen content in the printing chamber 21 is reduced to the preset value, thereby meeting the basic gas environment for 3D printing, reducing the waste of inert gas in the washing process, improving the washing efficiency, and providing a gas environment that meets the conditions for the 3D printing process.

[0154] After the air cleaning module 03 replaces the inert gas within the sealed print chamber 21, the 3D printing process can proceed. The laser light generated by the laser assembly 05 acts on the printing surface, forming the product while also producing sintered byproducts within the print chamber 21. The first and second airflow integration devices 29 and 01 blow out inert gas to remove byproducts within the print chamber 21. After filtering, the inert gas can also pass through the first and second airflow integration devices 29 and 01 and enter the print chamber 21, ensuring that the gas environment within the print chamber 21 remains relatively stable during the 3D printing process. In addition, the inert gas blown out by the third airflow integration device 04 primarily prevents smoke and dust from contaminating the galvanometer lens. The third airflow integration device 04 can also be incorporated into the inert gas circulation of the first and second airflow integration devices 29 and 01.

[0155] The above descriptions are merely some embodiments of the present invention and are intended to illustrate the technical solution of the present invention, not to limit it. It should be understood that those skilled in the art may make modifications or substitutions based on the above description without departing from the inventive concept of the present invention, and all such modifications and substitutions shall fall within the scope of protection of the appended claims. In such cases, all details may be replaced with equivalent elements, and the materials, shapes, and dimensions may be arbitrary.

Claims

1. A multi-laser 3D printing device, characterized in that: The invention comprises an additive molding chamber (1); a molding assembly (2) is provided above the additive molding chamber (1), and the additive molding chamber (1) can be sealed and connected to the molding assembly (2); the additive molding chamber (1) is provided on a transport assembly (3) and can slide on the transport assembly (3); the transport assembly (3) is provided on a frame (4); a powder cleaning assembly (5) is provided on one side of the additive molding chamber (1); The additive molding chamber (1) comprises a molding chamber body (11), and a support assembly (12) arranged in the molding chamber body (11); the support assembly (12) is connected to a lifting assembly (13); the lifting assembly (13) can drive the support assembly (12) to move up and down in the molding chamber body (11); the molding chamber body (11) and the lifting assembly (13) are sealedly connected.

2. A multi-laser 3D printing device according to claim 1, characterized in that: The lifting assembly (13) includes a plurality of guide rods (131) connected to the support assembly (12), a first driving device (132) for driving the guide rods (131) to move up and down, and a fixing plate (133) connected to the guide rods (131); A sealing assembly (14) is provided between each guide rod (131) and the forming bin body (11), and the sealing assembly (14) includes A sealing member (141), wherein the sealing member (141) is sealingly connected between the upper end surface of the bottom of the molding bin body (11) and the guide rod (131), and the sealing member (141) is sleeved on the guide rod (131); A shaft sleeve (142) is sealed and connected between the lower end surface of the bottom of the molding bin body (11) and the guide rod (131).

3. The multi-laser 3D printing device according to claim 1, characterized in that: The molding assembly (2) includes a printing chamber (21), a powder storage box (22) connected to the printing chamber (21) is provided on the printing chamber (21), and the powder storage box (22) is located on one side of the printing chamber (21); a powder dropping assembly (23) is provided in the printing chamber (21), and a transfer plate (24) is provided between the powder storage box (22) and the powder dropping assembly (23); a drop opening (221) of the powder storage box (22) is connected to one end of the transfer plate (24), and the powder dropping assembly (23) includes a feed opening (231) and a discharge opening (232), and the feed opening (231) is connected to the other end of the transfer plate (24); a scraper assembly (25) and a scraper driving device (26) for driving the scraper assembly (25) to move are provided in the printing chamber (21); and a laser assembly (05) is also provided on the printing chamber (21).

4. The multi-laser 3D printing device according to claim 3, characterized in that: The scraper assembly (25) comprises a support frame (251), a first scraper (252) and a second scraper (253); a powder storage chamber (254) is formed between the first scraper (252) and the second scraper (253); the first scraper (252) and the second scraper (253) are connected to the support frame (251); and powder in the powder falling assembly (23) can fall into the powder storage chamber (254) from the discharge port (232).

5. The multi-laser 3D printing device according to claim 1, characterized in that: The powder cleaning component (5) comprises a powder cleaning bin (51), and the bottom of the powder cleaning bin (51) is provided with an opening (511); A vent (52), at least one of the vents (52) is provided on the powder cleaning bin (51); An air outlet pipe (53), the air outlet pipe (53) is connected to the vent (52) and is capable of penetrating into the powder cleaning bin (51) and is located above the opening (511); A powder collecting device (54) is provided at the bottom of the powder cleaning bin (51).

6. The multi-laser 3D printing device according to claim 3, characterized in that: A first airflow integration device (29) is further provided on one side of the printing chamber (21), the first airflow integration device (29) comprising a first air outlet (291), a first air inlet (292) and a first air outlet (293) being respectively provided at both ends of the first air outlet (291), and the first air inlet (292) and the first air outlet (293) being in communication with each other; A plurality of first partitions (294) are provided between the first air inlet (292) and the first air outlet (293), and the first partitions (294) separate the air outlet portion into a plurality of first air outlet channels (295); The first air outlet (293) is connected to a first air outlet plate (296), and a plurality of first air outlets (2961) are arranged in an array on the first air outlet plate (296), and the areas of the first air outlets (296) decrease from bottom to top.

7. The multi-laser 3D printing device according to claim 6, characterized in that: The first partition (294) includes a transverse partition (2941) and a vertical partition (2942), wherein the transverse partition (2941) divides a plurality of vertical partitions (2942) into at least two layers of first air ducts (2943) at equal intervals. Several vertical partitions (2942) divide the first air duct (2943) of each layer into at least two at equal intervals.

8. The multi-laser 3D printing device according to claim 6, characterized in that: A second airflow integration device (01) and a third airflow integration device (04) are also provided above the first airflow integration device (29) in the printing chamber (21).

9. The multi-laser 3D printing device according to claim 8, characterized in that: The second airflow integration device (01) comprises: A second air outlet (011), wherein two ends of the second air outlet (011) are respectively provided with a second air inlet (012) and a second air outlet (013), and the second air inlet (012) and the second air outlet (013) are communicated with each other; A second partition (014), wherein a plurality of the second partitions (014) are provided between the second air inlet (012) and the second air outlet (013), and the plurality of the second partitions (014) separate the second air outlet portion (011) into a plurality of second air outlet channels (015); The second air outlet (013) is connected to a second air outlet plate (016), and a plurality of second air outlets (0162) are arranged in an array on the second air outlet plate (016), and the areas of the second air outlets (0161) decrease from bottom to top.

10. The multi-laser 3D printing device according to claim 9, characterized in that: The second air outlet portion (011) is divided into a plurality of second air outlet channels (015) with equal air outlet areas by a plurality of second partitions (014); and the second air outlet plate (016) is provided with at least three layers of second air outlets (0161) in an array.

11. The multi-laser 3D printing device according to claim 8, characterized in that: The third airflow integration device (04) comprises a third air outlet (041), and the third air outlet (041) is provided between the top of the printing chamber (21) and the plate, and the height of the third air outlet (041) is lower than the galvanometer lens.

12. The multi-laser 3D printing device according to claim 3, characterized in that: An air washing module (03) is connected to the printing chamber (21); the air washing module (03) comprises an air vent (031), an air release port (032) and an oxygen sensor (033) provided on the printing chamber (21); the air vent (031) is capable of introducing inert gas into the printing chamber (21), and the air release port (032) is capable of discharging gas from the printing chamber (21); The vent (031) and the air vent (032) are arranged diagonally opposite to each other on the printing chamber (21) in the same plane or space; an oxygen sensor (033) is provided on one end of the printing chamber (21) close to the air vent (032) for monitoring the oxygen content in the printing chamber (21).

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