Summary of the invention
In view of the foregoing, it is necessary to a kind of ducting system improving print quality is provided and there is the printer of this ducting system.
A kind of ducting system; including a forming room, an air inlet pipe and escape pipe of gas bleeding in this forming room being filled with protective gas in this forming room; the first diversion division and one being wherein provided with this air inlet pipe of connection in this forming room connects the second diversion division of this escape pipe; this first diversion division comprises some spaced flow-guiding channels; this air inlet pipe has an at least one air inlet pipe branch, each air inlet pipe branch with to should the flow-guiding channel of the first diversion division inconsistent.
A kind of printer, including a ducting system and a laser instrument, this laser instrument is used for Output of laser to be sintered the powder to be formed in this forming room, this ducting system includes a forming room, one air inlet pipe being filled with protective gas in this forming room and one escape pipe of gas bleeding in this forming room, the first diversion division and one being wherein provided with this air inlet pipe of connection in this forming room connects the second diversion division of this escape pipe, this first diversion division comprises some spaced flow-guiding channels, this air inlet pipe has at least one air inlet pipe branch, each air inlet pipe branch with to should the flow-guiding channel of the first diversion division inconsistent.
Compared to prior art; ducting system of the present invention and there is the printer of this ducting system by air inlet pipe being divided into some air inlet pipe branches; and the purpose of buffering is reached by flow-guiding channel corresponding in the first diversion division; avoid the dust occurred may cause this forming room because the flow velocity of protective gas is too fast in, improve print quality.
Detailed description of the invention
Refer to Fig. 1; the better embodiment of ducting system of the present invention includes that a forming room 10, is filled with an air inlet pipe 50 and escape pipe 40 of gas bleeding in this forming room 10 of protective gas in this forming room 10, and the first diversion division 30 and being wherein provided with this air inlet pipe 50 of a connection in this forming room 10 connects the second diversion division 20 of this escape pipe 40.In present embodiment, being equipped with powder to be formed in this forming room 10, this powder to be formed is used for being sintered action.This protective gas can be noble gas, will not react with this powder to be formed.In present embodiment; protective gas can be filled with in this forming room 10 by a circulating pump 903; the gas that this escape pipe 40 is extracted out can comprise protective gas and oxygen that may be present; for recycling protective gas; the gas released by this escape pipe 40 can be passed through a deaerating plant 905; remove with oxygen present in gas; afterwards by filtration, drying and other steps; and under the effect of middle circulating pump 903, remaining protective gas is filled with in this forming room 10 again through air inlet pipe 50; so reach to economize on the purpose of gas, advantageously reduce cost during printing.
Refer to Fig. 2; this first diversion division 30 is oppositely arranged with this second diversion division 20; this first diversion division 30 comprises spaced some flow-guiding channels 301; this air inlet pipe 50 has at least one air inlet pipe branch 501; each air inlet pipe branch 501 with to should the flow-guiding channel 301 of the first diversion division 30 inconsistent, so that protective gas is inputted to this forming room 10 by corresponding flow-guiding channel 301.This second diversion division 20 also comprises spaced some flow-guiding channels 201, this escape pipe 40 has at least one escape pipe branch 401, each escape pipe branch 401 with to should the flow-guiding channel 201 of the second diversion division 20 inconsistent, gas is drawn in this forming room 10, and then keep the oxygen concentration in forming room 10 to maintain in certain scope, it is ensured that safety during printing.In present embodiment, this flow-guiding channel 201 and 301 is generally cylindrical, and these flow-guiding channel 201 and 301 equalizations are arranged in the diversion division of correspondence, and the sidewall of this forming room 10 can be offered the corresponding seal accessed for air inlet pipe 50 and escape pipe 40.In other embodiments, these flow-guiding channels 201 and 301 also can be other shape, also can unequal be arranged in the diversion division of correspondence.
In present embodiment, this air inlet pipe 50 is generally cylindrical, and the big I of each air inlet pipe branch 501 is identical, during such as a diameter of 60 millimeters of the cross section when this air inlet pipe 50, if there is 6 air inlet pipe branches 501, the diameter in the cross section of each air inlet pipe branch 501 can be 10 millimeters.By an air inlet pipe 50 is divided into some branches, advantageously reduce the speed of air-flow when protective gas is filled with, the speed being likely to be due to insufflation gas so can be avoided inappropriate and blow afloat the deficiency of powder to be formed.In other embodiments, the formation of this air inlet pipe 50, size are also not limited to this.
In present embodiment, the end face of this forming room 10 being provided with a laser instrument 906, this laser instrument 906 is for being sintered the powder to be formed being layed on this forming room 10 bottom surface 101 in this forming room 10, to carry out 3 D-printing.
Refer to Fig. 3; in present embodiment; can arrange a position of splitter 80 outside the side that this first diversion division 30 is relative with this second diversion division 20, this position of splitter 80 has some openings 801, carries out buffered with the protective gas flowing out the flow-guiding channel 301 through this first diversion division 30.The shape of this opening 801 can be square, circular or other kinds of shape.When the switch of this opening 801 is square, the size of this opening 801 can be 2*2 millimeter or the size of 5*6 millimeter, but be also not necessarily limited to these sizes, and it reaches the purpose of buffering with the flow-guiding channel 301 of this first diversion division 30 when need to coordinate.
Referring to Fig. 4, the escape pipe branch 401 of this escape pipe 40 can be accessed by a diverter 60 in the flow-guiding channel 201 of this second diversion division 20.This diverter 60 includes being connected to the first diffluence pass 603 of flow-guiding channel 201 in this second diversion division 20, the second diffluence pass 605 being connected to escape pipe branch 401 in this escape pipe 40 and the ventilation inner tube 601 of some regulation gas flow rates.In present embodiment, this diverter 60 is general " l " shape, and this escape pipe branch 401 is sheathed on outside this second diffluence pass 605.
In present embodiment, each ventilation inner tube 601 includes kink 609 and a transition part 607, and this kink 609 is folded upward at an angle from the length direction of this transition part 607 and is formed.This diverter 60 include one in flanging 611 and an outer flanging 613, the proportional relation of distance of the space of each ventilation inner tube 601 and this ventilation inner tube 601 to this interior flanging 611.In present embodiment, the cross-sectional sizes (space) that each ventilation inner tube 601 is in the kink 609 at the first diffluence pass 603 is roughly the same, and the cross-sectional sizes (space) that each ventilation inner tube 601 is in transition part 607 at the second diffluence pass 605 differs, during away from this interior flanging 611, the cross section of the kink 609 of this ventilation inner tube 601 is the biggest, during with this interior flanging 611 close together, the cross section of the kink 609 of this ventilation inner tube 601 is the least.Due to the length of each ventilation inner tube 601 differs (can be according to the length of each ventilation inner tube 601 center line as comparing, other embodiment is not limited to this), when gas is drawn out of, for avoiding the unstable gas extracted out, by the space of the kink 609 from this interior flanging 611 ventilation inner tube 601 farther out being more than the space of the kink 609 of the ventilation inner tube 601 close to this interior flanging 611, so that the time at the second diffluence pass 605 of the ventilation inner tube 601 shorter with reaching length at the second diffluence pass 605 reaching the longer ventilation inner tube 601 of length of gas is roughly the same, in so also can avoiding causing forming room 10 due to differing of gas flow rate in certain degree, dust produces.In other embodiments, each ventilation inner tube 601 is in the cross-sectional sizes (space) of the kink 609 at the first diffluence pass 603 and also there is certain difference, and its need are arranged on each ventilation inner tube 601 space at the second diffluence pass 605 and also can reach identical effect.
Referring to Fig. 5, the air inlet pipe branch 501 of this air inlet pipe 50 can be connected with the flow-guiding channel 301 of this first diversion division 30 by a kuppe 70.
In present embodiment, this kuppe 70 includes that a body 713, is positioned at the convergence part 711 of this body 713 first end, some shunting posts 703 and one and is arranged at the connecting portion 709 of this body 713 second end.This connecting portion 709 is connected with the flow-guiding channel 301 of this first diversion division 30, and this connecting portion 709 includes a dividing plate 701, and this dividing plate 701 is provided with some openings 801 for being filled with protective gas in this forming room 10.This body 713 has a receiving space 715, and these shunting posts 703 are arranged at intervals in the receiving space 715 of this body 713.First end of each shunting post 703 is connected on this dividing plate 701, and the second end of each shunting post 703 upwardly extends from this dividing plate 701.
In present embodiment, a passageway 705 is formed between adjacent shunting post 703, first end in this passageway 705 is formed between adjacent shunting post 703 first end, forming second end in this passageway 705 between adjacent shunting post 703 second end, the space between this passageway 705 first end is more than the space of this passageway 705 second end.
In present embodiment, this air inlet pipe 50 can be divided into some air inlet pipe branches 501, each air inlet pipe branch 501 also can be divided into some sub-air inlet pipe branches.Owing to the size of this air inlet pipe branch 501 may be less than the flow-guiding channel 301 of this first diversion division 30, thus by this kuppe 70 being located at outside this air inlet pipe branch 501 to further ensure the stability of air-flow.
Above-mentioned ducting system and there is the printer of this ducting system by air inlet pipe 50 being divided into some air inlet pipe branches 501; and the purpose of buffering is reached by flow-guiding channel 301 corresponding in the first diversion division 30; avoid the dust occurred may cause this forming room 10 because the flow velocity of protective gas is too fast in, improve print quality.It addition, by arranging kuppe 70 in air inlet pipe branch 501 and/or arranging diverter 60 in escape pipe branch 401, thus further up to the purpose of coutroi velocity.
Those skilled in the art will be appreciated that; above embodiment is intended merely to the present invention is described; and it is not used as limitation of the invention; as long as within the spirit of the present invention, made above example suitably change and change all to fall is asked within the scope of protection in the present invention.