CN108407292A

CN108407292A - 3D printing equipment and its gas-recycling plant

Info

Publication number: CN108407292A
Application number: CN201810450239.7A
Authority: CN
Inventors: 张�雄; 贺进; 陈先飞; 朱驷鹤; 马跃科; 王金成
Original assignee: SHANGHAI UNION TECHNOLOGY Co Ltd
Current assignee: SHANGHAI UNION TECHNOLOGY Co Ltd
Priority date: 2018-05-11
Filing date: 2018-05-11
Publication date: 2018-08-17

Abstract

The application discloses a kind of 3D printing equipment and its gas-recycling plant, wherein the gas-recycling plant includes：Gas handling system includes the first air intake structure towards the container molding and the first side set on the molding room and the second air intake structure above first air intake structure set on molding room's first side and air inlet；Outlet system, including an at least air outlet structure, an at least air outlet structure are set to the second side of the molding room；Gas flow loop, including it is connected to first, second air intake structure and at least circulation line of an air outlet structure and the purification system being set in the circulation line.Utilize gas-recycling plant; the indoor moulding material of molding and shaped object may make to be in protective atmosphere; and; the gas that first air intake structure provides can be done directly on container molding; for being cleaned to carrying out molding shaped article in container molding, it is ensured that shaped article has good molding effect.

Description

3D printing equipment and its gas-recycling plant

Technical field

This application involves 3D printing fields, more particularly to a kind of 3D printing equipment and its gas-recycling plant.

Background technology

3D printing technique is (also known as：Three-dimensional printing technology) it is a kind of cumulative manufacturing technology of three-dimensional real object rapid shaping, it is main If based on mathematical model, with moulding materials such as special wax material, powdery metal or plastics, in a manner of successively printing To construct material object.Using the machine of 3D printing technique printed product, we can be referred to as 3D printing equipment, and principle is data It is put into 3D printing equipment with raw material, machine can from level to level manufacture product according to program.3D printing equipment is due to molding Precision height has extensive use in fields such as mold, goods made to order, medical jig, prostheses.

In the prior art, the 3D printing equipment of certain 3D printing techniques, such as selective laser sintering (Selective Laser Sintering, abbreviation SLS), selective laser melting (Selective Laser Melting, abbreviation SLM) and Electron-beam smelting (Electron Beam Melting, abbreviation EBM) etc., internal temperature can be relatively high in the process of running, at this In, the temperature in 3D printing equipment mainly may include parts and the indoor atmosphere of molding inside equipment etc..It is chronically at height Under warm environment, 3D printing equipment can print bad phenomenon in print procedure in the presence of some, for example, parts poor heat radiation is made Decline at performance.In addition, by taking the 3D printing techniques such as SLS, SLM, EBM above-mentioned as an example, moulding material melts after being excited, In, part moulding material can ascension or volatilization under the high temperature conditions, may pollute other parts or influence printing effect.

Invention content

The shortcomings that in view of above prior art, the purpose of the application are to disclose a kind of 3D printing equipment and are applied to 3D The gas-recycling plant of printing device, use solve the relevant technologies described in and problems.

The first aspect of the application discloses a kind of gas-recycling plant, is applied to a 3D for including molding room and container molding In printing device, the gas-recycling plant includes：Gas handling system, including it is set to molding room's first side and air inlet court The first air intake structure to the container molding and the first side set on the molding room and positioned at described first into depressed The second air intake structure above structure；Outlet system, including an at least air outlet structure, an at least air outlet structure be set to it is described at The second side of type room；Gas flow loop, including it is connected to following for first, second air intake structure and an at least air outlet structure Endless tube road and the purification system being set in the circulation line.

In the certain embodiments of the first aspect of the application, from the connector of first air intake structure to air inlet Direction on, the width of first air intake structure gradually increases and its height is gradually reduced.

In the certain embodiments of the first aspect of the application, first air intake structure include the extension that connects and Straight-through portion, wherein from the connector to the direction of air inlet of first air intake structure, the width of the extension gradually increases Big and its height is gradually reduced.

In the certain embodiments of the first aspect of the application, first air intake structure is internally provided with the first air inlet Diversion member is used to form multiple airintake wind-tunnels.

In the certain embodiments of the first aspect of the application, from the connector of first air intake structure to air inlet Direction on, the first air inlet diversion member gradually extends out.

In the certain embodiments of the first aspect of the application, the is equipped at the air inlet of first air intake structure One flase floor, first flase floor are equipped with the first air inlet grille.

In the certain embodiments of the first aspect of the application, the thickness of first flase floor is greater than described The opening width size of first air inlet grille.

In the certain embodiments of the first aspect of the application, from the connector of second air intake structure to air inlet Direction on, the width of second air intake structure gradually increases and its height is gradually reduced.

In the certain embodiments of the first aspect of the application, second air intake structure is internally provided with the second air inlet Diversion member is used to form multiple airintake wind-tunnels.

In the certain embodiments of the first aspect of the application, from the connector of second air intake structure to air inlet Direction on, the second air inlet diversion member gradually extends out.

In the certain embodiments of the first aspect of the application, the is equipped at the air inlet of second air intake structure Two flase floors, second flase floor are equipped with the second air inlet grille.

In the certain embodiments of the first aspect of the application, the thickness of second flase floor is greater than described The opening width size of second air inlet grille.

In the certain embodiments of the first aspect of the application, the gas outlet of an at least air outlet structure is described in Container molding.

In the certain embodiments of the first aspect of the application, the outlet system includes two air outlet structures, described Two gas outlets in two air outlet structures are arranged parallel.

In the certain embodiments of the first aspect of the application, the second side is oppositely arranged with first side, institute The air inlet for stating at least gas outlet of an air outlet structure and first air intake structure is located at the opposite of the container molding Both sides.

In the certain embodiments of the first aspect of the application, an at least air outlet structure is internally provided with out conductance Fluid element forms multiple outgassing wind-tunnels.

In the certain embodiments of the first aspect of the application, the gas outlet in an at least air outlet structure and outlet Channel forms angle, and the outlet diversion member has water conservancy diversion corner for being guided gas to outlet passageway by gas outlet It is interior.

In the certain embodiments of the first aspect of the application, the gas-recycling plant further include with described second into The flow-guiding structure that depressed structure is oppositely arranged is set to the intersection of second side and top surface in the Photocopy Room.

In the certain embodiments of the first aspect of the application, the purification system includes wind turbine and filter core.

The second aspect of the application discloses a kind of 3D printing equipment, including：Molding room；Container molding is set to the molding It is indoor；Powder supply mechanism is set in the molding room, for forming shaping material layer to be formed on the container molding；Energy Radiating system is measured, for radiation energy to the shaping material layer to form shaped object；Foregoing gas-recycling plant.

In the certain embodiments of the second aspect of the application, the energy radiating system is laser radiation system, packet Include laser, galvanometer and field lens, the field lens is towards the container molding；The air inlet of second air intake structure is described in Field lens is to the optical path between the container molding.

In the certain embodiments of the second aspect of the application, the energy radiating system is electron-beam scanning system, For to the container molding radiation electric beamlet；The air inlet of second air intake structure is towards the electron-beam scanning system Electron beam scan path.

The application third aspect discloses a kind of gas-recycling plant, is applied to a 3D including molding room and container molding and beats In printing apparatus, the gas-recycling plant includes：Gas handling system includes set on molding room's first side first into depressed Structure, towards the container molding, first air intake structure is internally provided with for being formed the air inlet of first air intake structure First air inlet diversion member of multiple airintake wind-tunnels；Outlet system, including an at least air outlet structure, an at least air outlet structure Set on the second side of the molding room；Gas flow loop, including connection first air intake structure and described at least one go out it is depressed The circulation line of structure and the purification system being set in the circulation line.

In the certain embodiments of the third aspect of the application, from the connector of first air intake structure to air inlet Direction on, the width of first air intake structure gradually increases and its height is gradually reduced.

In the certain embodiments of the third aspect of the application, first air intake structure include the extension that connects and Straight-through portion, wherein from the connector to the direction of air inlet of first air intake structure, the width of the extension gradually increases Big and its height is gradually reduced.

In the certain embodiments of the third aspect of the application, first air intake structure is internally provided with the first air inlet Diversion member forms multiple airintake wind-tunnels.

In the certain embodiments of the third aspect of the application, from the connector of first air intake structure to air inlet Direction on, the first air inlet diversion member gradually extends out.

In the certain embodiments of the third aspect of the application, the is equipped at the air inlet of first air intake structure One flase floor, first flase floor are equipped with the first air inlet grille.

In the certain embodiments of the third aspect of the application, the thickness of first flase floor is greater than described The opening width size of first air inlet grille.

In the certain embodiments of the third aspect of the application, the gas handling system further includes the second air intake structure, institute The second air intake structure is stated set on the first side of the molding room and above first air intake structure.

In the certain embodiments of the third aspect of the application, from the connector of second air intake structure to air inlet Direction on, the width of second air intake structure gradually increases and its height is gradually reduced.

In the certain embodiments of the third aspect of the application, second air intake structure is internally provided with the second air inlet Diversion member is used to form multiple airintake wind-tunnels.

In the certain embodiments of the third aspect of the application, from the connector of second air intake structure to air inlet Direction on, the second air inlet diversion member gradually extends out.

In the certain embodiments of the third aspect of the application, the is equipped at the air inlet of second air intake structure Two flase floors, second flase floor are equipped with the second air inlet grille.

In the certain embodiments of the third aspect of the application, the thickness of second flase floor is greater than described The opening width size of second air inlet grille.

In the certain embodiments of the third aspect of the application, the gas outlet of an at least air outlet structure is described in Container molding.

In the certain embodiments of the third aspect of the application, the outlet system includes two air outlet structures, described Two gas outlets in two air outlet structures are arranged parallel.

In the certain embodiments of the third aspect of the application, the second side is oppositely arranged with first side, institute The air inlet for stating at least gas outlet of an air outlet structure and first air intake structure is located at the opposite of the container molding Both sides.

In the certain embodiments of the third aspect of the application, an at least air outlet structure is internally provided with out conductance Fluid element forms multiple outgassing wind-tunnels.

In the certain embodiments of the third aspect of the application, the gas outlet in an at least air outlet structure and outlet Channel forms angle, and the outlet diversion member has water conservancy diversion corner for being guided gas to outlet passageway by gas outlet It is interior.

In the certain embodiments of the third aspect of the application, the gas-recycling plant further include with described second into The flow-guiding structure that the air inlet of depressed structure is oppositely arranged is set to the intersection of second side and top surface in the molding room.

In the certain embodiments of the third aspect of the application, the purification system includes wind turbine and filter core.

The application fourth aspect discloses a kind of 3D printing equipment, including：Molding room；Container molding is set to the molding room It is interior；Powder supply mechanism is set in the molding room, for forming shaping material layer to be formed on the container molding；Energy Radiating system, for radiation energy to the shaping material layer to form shaped object；Foregoing gas-recycling plant.

3D printing equipment disclosed in the present application and its gas-recycling plant, have the following technical effect that：By gas via following Endless tube road and the first air intake structure provide the protective gas of flowing to molding room, and, indoor protective gas is molded via outlet Structure and circulation line are back to after purification system carries out purification filtering and are input in molding room again, are followed to form protective gas Ring utilizes so that is molded indoor moulding material and shaped object is in protective atmosphere.Meanwhile first air intake structure provide Gas can be done directly on container molding, for being cleaned to carrying out molding shaped article in container molding, it is ensured that molding Object has good molding effect.

Description of the drawings

Fig. 1 is shown as the simple schematic diagram of gas-recycling plant in one embodiment in the application 3D printing equipment.

Fig. 2 is shown as the simple schematic diagram of gas-recycling plant in another embodiment in the application 3D printing equipment.

Fig. 3 is shown as the assembling schematic diagram of the application 3D printing equipment in one embodiment.

Fig. 4 is shown as the assembling exploded view of the application 3D printing equipment in one embodiment.

Fig. 5 is shown as the schematic diagram of SLM type 3D printing equipment in one embodiment.

Fig. 6 is shown as the sectional view of the first air intake structure in Fig. 4.

The air-flow that Fig. 7 is shown as in Fig. 4 in the first air intake structure moves towards schematic diagram.

Fig. 8 is shown as the structural schematic diagram of the first air intake structure in another embodiment.

Fig. 9 is shown as the sectional view of the bottom of Tu3Zhong molding room.

Figure 10 is shown as the assembling schematic diagram of the application 3D printing equipment in another embodiment.

Figure 11 is shown as the assembling exploded view of the application 3D printing equipment in another embodiment.

Figure 12 is shown as the sectional view of the second air intake structure in Figure 11.

Figure 13 is shown as the sectional view at the top with respect to molding room in Figure 10.

The gas-recycling plant that Figure 14 is shown as 3D printing device configuration in Figure 10 walks direction view in the indoor air-flow of molding.

Specific implementation mode

Illustrate that presently filed embodiment, those skilled in the art can be by this explanations by particular specific embodiment below Content disclosed by book understands other advantages and effect of the application easily.

In described below, refer to the attached drawing, attached drawing describes several embodiments of the application.It should be appreciated that also can be used Other embodiment, and can be carried out without departing substantially from spirit and scope mechanical composition, structure, electrically with And operational change.Following detailed description should not be considered limiting, and the range of embodiments herein Only limited by the claims for the patent announced.Term used herein is merely to describe specific embodiment, and be not It is intended to limitation the application.The term of space correlation, for example, "upper", "lower", "left", "right", " following ", " lower section ", " lower part ", " top ", " top " etc. can be used in the text in order to an elements or features shown in definition graph and another element or spy The relationship of sign.

The application discloses a kind of 3D printing equipment, and the 3D printing equipment includes：Molding room；Container molding is set to described In molding room；Powder supply mechanism is set in the molding room, for forming moulding material to be formed on the container molding Layer；Energy radiating system, for radiation energy to the shaping material layer to form shaped object；Gas-recycling plant is used for The protective gas of flowing is provided to molding room so that being molded indoor moulding material and shaped object is in protective atmosphere.

Referring to Fig. 1, being shown as the simple signal of gas-recycling plant in one embodiment in the application 3D printing equipment Figure.Here, it should be noted that, Fig. 1 is only simple schematic diagram, focuses on introducing the gas circulation that 3D printing equipment is provided Device, therefore, the overall structure of 3D printing equipment and it includes certain parts it is (incomplete) display.As shown in Figure 1, this Gas-recycling plant in embodiment includes：Gas handling system, outlet system and gas flow loop.The gas handling system is at least wrapped The first air intake structure 11 is included, the first air intake structure 11 is set to the first side of molding room 31, the air inlet of the first air intake structure 11 Towards the container molding 311 in molding room 31.The outlet system include an at least air outlet structure 13, described at least one go out it is depressed Structure 13 is set to the second side of molding room 31.The gas flow loop includes the first air intake structure 11 of connection and an at least air outlet structure 13 circulation line and the purification system being set in the circulation line, the purification system may include wind turbine and filter core. Using the gas-recycling plant in the present embodiment, on the whole, the protective gas of flowing is provided so that molding room to molding room 31 Moulding material and shaped object in 31 are in protective atmosphere.In addition, the first air intake structure in the gas-recycling plant 11 air inlet is towards the container molding 311 in molding room 31, it can be ensured that 311 top of container molding is without influencing the dry of molding effect Disturb source.

Show referring to Fig. 2, being shown as in another embodiment simple of gas-recycling plant in the application 3D printing equipment It is intended to.Here, it should be noted that, Fig. 2 is only simple schematic diagram, focuses on introducing the gas that 3D printing equipment is provided and follow Loop device, therefore, the overall structure of 3D printing equipment and it includes certain parts it is (incomplete) display.As shown in Fig. 2, Gas-recycling plant in the present embodiment includes：Gas handling system, outlet system and gas flow loop.The gas handling system is at least Including the first air intake structure 11 and the second air intake structure 12, the first air intake structure 11 is set to the first side of molding room 31, and first The air inlet of air intake structure 11 is set to the first of molding room towards the container molding 311 in molding room 31, the second air intake structure 12 Side, the second air intake structure 12 are located at the top of the first air intake structure 11.The outlet system includes an at least air outlet structure 13, An at least air outlet structure 13 is set to the second side of molding room 31.The gas flow loop includes the first air intake structure of connection 11, the second air intake structure 12 and at least circulation line of an air outlet structure 13 and the purification system being set in the circulation line System, the purification system may include wind turbine and filter core.Using the gas-recycling plant in the present embodiment, on the whole, to molding room 31 provide the protective gas of flowing so that moulding material and shaped object in molding room 31 are in protective atmosphere.In addition, The air inlet of the first air intake structure 11 in the gas-recycling plant is towards the container molding 311 in molding room 31, it can be ensured that 311 top of container molding is without the interference source for influencing molding effect.

Please refer to Fig. 3 and Fig. 4, wherein Fig. 3 is shown as the assembly signal of the application 3D printing equipment in one embodiment Figure, Fig. 4 are shown as the assembling exploded view of the application 3D printing equipment in one embodiment.In this application, it may be used for example For selective laser sintering (Selective Laser Sintering, abbreviation SLS), selective laser melting (Selective Laser Melting, abbreviation SLM), the 3D of the technologies such as electron-beam smelting (Electron Beam Melting, abbreviation EBM) beats Printing apparatus.

It is to be sintered powder using infrared laser by taking selective laser sintering SLS as an example.Computer is by three dimensions of object According to being converted into the 2D data in section from level to level and being transferred to printer, printer control laser selects above the powder laid Property powder is irradiated, the powder in laser energy selected area absorbs and be converted to thermal energy, is heated to the powder of sintering temperature Last interparticle contact interface expands, stomata reduces, densification degree improves, and then cooled and solidified becomes fine and close, hard sintering Body is processed into current layer.Subsequently, by one layer of new powder spreading on the current layer being sintered, equipment is called in new one layer and is cut The data in face are processed, and are bonded with previous layer cross section, this journey successively recycles until whole object is molded.

By taking selective laser melting SLM as an example, it is to convert the energy of laser to thermal energy metal powder is made to be molded, is making During making, metal powder is heated to be completely melt aftershaping.Computer converts the three-dimensional data of object to section from level to level 2D data and be transferred to printer, printer control laser selectively powder is shone above the powder laid It penetrates, laser energy absorbs and be converted to thermal energy by powder, and the metal powder in constituency is heated to be completely melt aftershaping, is processed into Current layer.Subsequently, by one layer of new powder spreading on the current layer being sintered, equipment call in the data of a new layer cross section into Row processing, bonds with previous layer cross section, this journey successively recycles until whole object is molded.

It is to melt metal powder using high-power electron beam by taking electron-beam smelting EBM as an example.Computer is by the three of object Dimension data is converted into the 2D data in section from level to level and is transferred to printer, and printer selects above the metal powder laid Property to metal powder launching electronics beam, the kinetic energy of electronics is converted to thermal energy, and the metal powder in constituency is heated to be completely melt Aftershaping is processed into current layer.Subsequently, by one layer of new metal powder spreading on the current layer being sintered, equipment is called in The data of a new layer cross section are processed, and are bonded with previous layer cross section, this process successively recycles until whole object is molded.

The application 3D printing equipment is described in detail by taking selective laser melting SLM as an example below.Referring to Fig. 5, It is shown as the schematic diagram of SLM type 3D printing equipment in one embodiment.

As shown in Figures 3 to 5, the application 3D printing equipment includes：Molding room 31, container molding 311, powder supply mechanism 312, Energy radiating system 4 and gas-recycling plant.

Molding room 31 is formed by a body structure, the body structure include front, the back side, left side, right side, Bottom surface and top surface, wherein the front of the body structure is a room door that can make opening and closing movement, and the room door can be equipped with observation Window, for observing molding room 31.In some embodiments, it is observed to be more convenient for, the other faces of the babinet (such as each side Face etc.) also can correspondingly be arranged observation window or it is whole using transparent material (such as：Glass, organic glass etc.).

Container molding 311 is set in molding room 31, and in the present embodiment, container molding 311 is set to the bottom of molding room 31 Portion.Container molding 311 may be, for example, a moulding cylinder, as shown in figure 4, the bottom of molding room 31 is offered for container molding is arranged 311 opening, the opening match with the section of container molding 311, if for example, container molding 311 is circular moulding cylinder, Then the opening is circular open, if container molding 311 is rectangular moulding cylinder, opening is square aperture.In certain implementations In mode, the top of container molding 311 is opening, and the bottom of container molding 311 has a movable floor and the driving work The elevating mechanism of dynamic bottom plate lifting, the elevating mechanism may be, for example, piston structure.

Powder supply mechanism 312 is set in molding room 31, to be formed to be formed on container molding 311 for distributing moulding material Shaping material layer.In selective laser melting SLM type 3D printing technique, moulding material used may be, for example, metal powder End, the metal powder, which can be the metal powder of single material, can also include the mixing of two or more metal powder Metal powder.Using powder supply mechanism 312, container molding 311 can will be transferred to as the metal powder of moulding material.In certain realities Apply in mode, powder supply mechanism 312 can a such as powder-laying roller, the powder-laying roller is controlled by a transmission mechanism and rotates, to realize Powdering.In some embodiments, powder supply mechanism 312 can a such as scraper, the scraper can move left and right, and pass through the scraper Move left and right, moulding material can be transferred to container molding 311.

In the foregoing, it is to be understood that, moulding material can be transferred to container molding 311 using powder supply mechanism 312, therefore, In the present embodiment, the application 3D printing equipment may also include the charge cask 313 for holding moulding material.Due to, it is described at Proximate matter material is, for example, metal powder, and charge cask 313 may be, for example, to contain powder cylinder, as shown in figure 4, the bottom of molding room 31 offers For the opening of charge cask 313 is arranged, the opening and the section of charge cask 313 match, if for example, charge cask 313 For circular Sheng powder cylinder, then the opening is circular open, if charge cask 313 is rectangular Sheng powder cylinder, opening is rectangular Opening.In some embodiments, the top of charge cask 313 is opening, and the bottom of charge cask 313 has a movable floor And the elevating mechanism of the driving movable floor lifting, the elevating mechanism may be, for example, piston structure.In practical applications, Sheng powder cylinder as charge cask 313 is adjacent to the moulding cylinder as container molding 311, in this way, using the operation of powder-laying roller, it can Metal powder in the Sheng powder cylinder is transferred in moulding cylinder.

Energy radiating system 4 is for radiation energy to the shaping material layer to form shaped object 5.In the present embodiment In, by taking SLM type 3D printing equipment as an example, energy radiating system 4 may be, for example, laser radiation system, and the laser radiation system can Including：Laser 41, galvanometer 42 and field lens 43, wherein may also include beam expanding lens 44, field between laser 41 and galvanometer 42 Mirror 43 is set in molding room 31, and specifically, field lens 43 is set to the surface for being right against container molding 311, is used for laser 41 The laser beam of generation is irradiated on the region to be printed of container molding 311.

For SLM type 3D printer, during it carries out 3D printing operation, laser light is generated by laser 41 Beam, the laser beam retrodeviated by beam expanding lens 44, galvanometer 42 and field lens 43 go to container molding 311 (such as：Moulding cylinder) Region to be printed on.Specifically, computer converts the three-dimensional data of object to the 2D data in section from level to level and is transferred to Printer, printer controls to be selected above the moulding material that laser beam is laid on the region to be printed of container molding 311 Property moulding material is irradiated, be located at container molding 311 region to be printed on shaping material layer through laser beam (swash The energy of light light beam is converted into thermal energy) after, moulding material melted by heat aftershaping completes current layer；It is driven using piston structure The movable floor of dynamic container molding 311 declines so that moulding material and the shaped object 5 by moulding material institute support decline；Profit With piston structure driving charge cask 313 (such as：Contain powder cylinder) movable floor lifting, the moulding material in charge cask 313 (such as：Metal powder) it overflows；Using powder supply mechanism 312 (such as：Powder-laying roller) moulding material that will be overflowed in charge cask 313 It is transferred on container molding 311, to cover a formable layer material layer on the current layer of shaped object 5 in container molding 311； Subsequently, 3D printing equipment controls laser beam according to the data of a new layer cross section and selectively shines new shaping material layer It penetrates, is bonded with the shaped article (that is, previous layer cross section) under it after new shaping material layer melted by heat.In this way, this reciprocal mistake Journey realizes successively cycle until whole object is molded.

Gas-recycling plant disclosed in the present application is used to provide the protective gas of flowing so that molding room to molding room 31 Moulding material and shaped object in 31 are in protective atmosphere.In the present embodiment, the gas-recycling plant includes air inlet System, outlet system and gas flow loop.

The gas handling system includes the first air intake structure 11, and the first air intake structure 11 is set to the first side of molding room 31, The air inlet of first air intake structure 11 is towards the container molding 311 in molding room 31.

Referring to Fig. 6, being shown as the sectional view of the first air intake structure 11 in Fig. 4.In conjunction with Fig. 4 and Fig. 6, in the present embodiment In, the first air intake structure 11 is set to the bottom of molding room 31, the first air intake structure 11 have a connector and with the company The opposite air inlet of interface, the connector are connected to the circulation line in the gas flow loop, and the air inlet is right against into Type container 311, in this way, by the connector receive circulation line be sent into Lai gas and by after gas transport by the air inlet Directly act on container molding 311.

Particularly, in the present embodiment, from the connector of the first air intake structure 11 (connector and circulation line phase Even) on the direction of air inlet (air inlet with container molding 311 opposite), the width of the first air intake structure 11 gradually increases And its height is gradually reduced.The so design of the structure of first air intake structure 11 is considered based on following：First air intake structure 11 Width gradually increases to adapt to the size of container molding 311 on the width.For example, container molding 311 is a moulding cylinder, that , the width of the first air intake structure 11 is gradual to be increased until in the end (that is, air inlet above-mentioned) of the first air intake structure 11 Width be more than or equal to as container molding 311 moulding cylinder diameter so that by the first air intake structure 11 feeding Lai gas The coverage area of body can be fully contemplated by entire container molding 311.The height of first air intake structure 11 gradually decreases, and essentially consists in Play the role of gathering air-flow, by the first air intake structure 11 be sent into Lai gas may act on container molding 311, attachment can be blown off In on molding current layer or the moulding material on periphery or the part moulding material that volatilizees due to heated.Wherein, the attachment In on molding current layer or the moulding material on periphery, refer to：Certain in forming process, on wanting molding current layer side A little parts moulding material can also melt part due to radiation energy of the part by energy radiating system, certain part moulding materials Though being not affected by the radiation of energy radiating system it is also possible to being attached on current layer.What the part moulding material of the volatilization referred to It is：In forming process, the shaping material layer in energy radiating system radiation energy to container molding 311, the moulding material Part in layer is volatilized because heated, is suspended in the top of container molding 311.Therefore, the height of the first air intake structure 11 can be set It is calculated as gradually decreasing, the effect for gathering air-flow can be effectively played, accelerate flowing of the air-flow in the first air intake structure 11, more conducively It is attached on molding current layer or the moulding material on periphery or the part moulding material that volatilizees due to heated to blowing off, it is ensured that at The cleaning of the current layer of type, in favor of the molding effect of succeeding layer.

In some embodiments, may also include one adjacent to the end of the air inlet in the first air intake structure 11 to lead directly to Section.

In the present embodiment, first air inlet diversion member can be set in the inside of the first air intake structure 11.Specifically, first Air intake structure 11 is internally provided with the first air inlet diversion member 111, can be in the first air inlet by the first air inlet diversion member 111 The inside of structure 11 forms multiple airintake wind-tunnels.As shown in fig. 6, the first air inlet diversion member 111 in the first air intake structure 11 May be, for example, air inlet flow deflector, the air inlet flow deflector is mutually fitted in height and length with the overall structure of the first air intake structure 11 Match.Specifically, in length, from the connector to the direction of air inlet of the first air intake structure 11, air inlet flow deflector 111 is gradually It extends out.By taking Fig. 6 as an example, it is equipped with 5 air inlet flow deflectors 111 in the first air intake structure 11, wherein a central air inlet water conservancy diversion Piece 111 is to be centrally located, and the air inlet flow deflector 111 for being respectively in both sides then gradually extends out, and air inlet flow deflector 111 is using so knot Structure and its layout can divide the inlet channel in the first air intake structure 11 to form multiple airintake wind-tunnels, and may make it is each into Gas air duct is uniformly distributed so that the air-flow in each airintake wind-tunnel is balanced.Referring to Fig. 7, being shown as in the first air intake structure 11 Air-flow moves towards schematic diagram.As shown in fig. 7, the air-flow relative equilibrium in the multiple airintake wind-tunnels formed by air inlet flow deflector 111, stream It is fast uniform.

In addition, in some embodiments, in the end of air inlet flow deflector 111 there is a water conservancy diversion to lead directly to section.In height, The height of air inlet flow deflector 111 is highly consistent with the first air intake structure 11, that is, the bottom of air inlet flow deflector 111 is connected to The bottom surface of one air intake structure 11, the top of air inlet flow deflector 111 are connected to the top surface of the first air intake structure 11.

First air intake structure is additionally provided with the first flase floor.In the present embodiment, at the air inlet of the first air intake structure 11 Equipped with the first flase floor 113, the first flase floor 113 is equipped with the first air inlet grille.Specifically, it is uniformly opened up on the first flase floor 113 There are multiple air inlet grilles, particularly, the thickness of the first flase floor 113 is greater than the opening width size of the first air inlet grille, such as This, single first air inlet grille can inherently form the small air duct of air-flow with certain length.As shown in fig. 6, the first air inlet grille is The air inlet grid of rectangular section, the length of the air inlet grid are greater than the catercorner length of the air inlet grid.Certainly, first Air inlet grille is not limited thereto, and in other embodiments, first air inlet grille may be, for example, the air inlet circular hole of circular cross-section, The length of the air inlet circular hole is greater than the diameter of the air inlet circular hole.Alternatively, first air inlet grille may be, for example, ellipse The air inlet elliptical aperture in section, the length of the air inlet elliptical aperture are greater than the long axis of the air inlet elliptical aperture.Alternatively, described first Air inlet grille may be, for example, the air inlet hexagonal hole of regular hexagonal section, and the length of the air inlet hexagonal hole is greater than described The diagonal length of air inlet hexagonal hole.In practical applications, the first air intake structure 11 is absolute construction, can be for example, by spiral shell Silk the modes such as locks or buckles and is installed at the air inlet of the first air intake structure.

First air intake structure 11 is not limited in structure shown in Fig. 6, can still make other variations.In certain implementations In mode, as shown in figure 8, according to the design feature of molding room 311 in 3D printing equipment, the first air intake structure 11 ' may include：Expand Exhibition portion 112 and the straight-through portion 114 being connected with extension 112, wherein extension 112 and the circulation line in the gas flow loop Connection, straight-through portion 114 is right against container molding 311, in this way, receiving circulation line by extension 112 is sent into the gas come and general Gas directly acts on container molding 311 after reaching straight-through portion 114.For extension 112, from the first air intake structure 11 ' Connector (connector is connected with circulation line) to the direction of air inlet (air inlet with container molding 311 opposite) On, the width of extension 112 gradually increases and its height is gradually reduced.The inside of the extension 112 of first air intake structure 11 ' is set Have the first air inlet diversion member 111 ', by the first air inlet diversion member 111 ', can the inside of extension 112 formed it is multiple into Gas air duct.At the air inlet of the first air intake structure 11 ' be equipped with the first flase floor 113 ', the first flase floor 113 ' be equipped with first into Gas lattice.

The outlet system includes an at least air outlet structure 13, and an at least air outlet structure 13 is set to the second side of molding room 31 Face, at least gas outlet of an air outlet structure 13 are towards the container molding 311 in molding room 31.Herein, the second side with Aforementioned first side is oppositely arranged, that is, at least an air outlet structure 13 is respectively arranged on the phase of molding room 31 with the first air intake structure 11 To both sides.

Referring to Fig. 9, being shown as the sectional view of the bottom in Fig. 3 with respect to molding room.In conjunction with Fig. 4 and Fig. 9, in the present embodiment In, the outlet system includes two air outlet structures 13, and two air outlet structures 13 are set to the bottom of molding room 31, two outlets The setting and towards the container molding 311 in molding room 31 parallel of two gas outlets in structure.Using air outlet structure 13, can receive Gas in molding room 31 simultaneously smoothly takes it out of.

Air outlet structure 13 has an outlet passageway 131, for guiding the gas of reception into side.In this way, air outlet structure 13 In gas outlet and outlet passageway 131 form angle at an angle, as shown in figure 9, the gas outlet of air outlet structure 13 at Line between type container 311 is with outlet passageway 131 in 90 degree of settings.In view of this, in the present embodiment, air outlet structure 13 Be equipped with outlet diversion member 132 at internal neighbouring gas outlet, form multiple outgassing wind-tunnels, and can by gas by gas outlet guide to In outlet passageway 131.As shown in figure 9, the outlet diversion member 132 in air outlet structure 13 may be, for example, outlet flow deflector, outlet Flow deflector 132 has a water conservancy diversion corner compatible with the angle that the gas outlet and outlet passageway are formed.Specifically, go out conductance Flow 132 may include that water conservancy diversion segmental arc and the water conservancy diversion being connected with the water conservancy diversion segmental arc lead directly to section, wherein the water conservancy diversion segmental arc is set to The exit of air outlet structure 13, the water conservancy diversion lead directly to section and are then parallel to outlet passageway 131.In some embodiments, due to going out Line between the gas outlet and container molding 311 of depressed structure 13 is with outlet passageway 131 in 90 degree of settings, therefore, the water conservancy diversion Segmental arc may be, for example, 1/4 arc section.But it is not limited thereto, in some embodiments, the water conservancy diversion segmental arc also may be, for example, More curved surface segmental arcs.Still by taking the water conservancy diversion segmental arc is 1/4 arc section as an example, because of multiple outlet flow deflectors in air outlet structure 13 132 position is different, and the radius for being directed to the water conservancy diversion segmental arc of each outlet flow deflector 132 also differs, for example, being located at depressed The radius of the water conservancy diversion segmental arc of outlet flow deflector 132 on the inside of the air outlet of structure 13 is smaller, and positioned at the air outlet of air outlet structure 13 The radius of the water conservancy diversion segmental arc of the outlet flow deflector 132 in outside is larger.

Gas flow loop includes being connected to the first air intake structure 11 and at least circulation line of an air outlet structure 13 and being set to Purification system in the circulation line.In the present embodiment, the purification system can include at least wind turbine and filter core.

In the 3D printing equipment of the present embodiment, using the gas-recycling plant of offer, by wind turbine driving gas via following Endless tube road and the first air intake structure 11 to molding room 31 provide the protective gas of flowing so that moulding material in molding room 31 It is in protective atmosphere with shaped object, and, the protective gas in molding room 31 is returned via air outlet structure 13 and circulation line It is input in molding room 31 after carrying out purification filtering to purification system, is recycled to form protective gas again.Meanwhile first The gas that air intake structure 11 provides can be done directly on container molding 311, for carrying out molding molding in container molding 311 Object is cleaned, it is ensured that shaped article has good molding effect.

Please refer to Fig.1 0 and Figure 11, wherein Figure 10 is shown as the assembly of the application 3D printing equipment in another embodiment Schematic diagram, Figure 11 are shown as the assembling exploded view of the application 3D printing equipment in another embodiment.In this application, it can adopt With for example, selective laser sintering (Selective Laser Sintering, abbreviation SLS), selective laser melting (Selective Laser Melting, abbreviation SLM), electron-beam smelting (Electron Beam Melting, abbreviation EBM) etc. The 3D printing equipment of technology.

It is high-power electron beam on probation to melt metal powder by taking electron-beam smelting EBM as an example.Computer is by the three of object Dimension data is converted into the 2D data in section from level to level and is transferred to printer, printer above the powder laid selectively To powder launching electronics beam, the kinetic energy of electronics is converted to thermal energy, and the metal powder in constituency is heated to be completely melt aftershaping, adds Work is at current layer.Subsequently, by one layer of new powder spreading on the current layer being sintered, equipment calls in the number of a new layer cross section It according to being processed, is bonded with previous layer cross section, this process successively recycles until whole object is molded.

In conjunction with Figure 10, Figure 11 and Fig. 5, the application 3D printing equipment includes：Molding room 31, container molding 311, powder supply mechanism 312, energy radiating system 4 and the gas-recycling plant.

Container molding 311 is set in molding room 31, and in the present embodiment, container molding 311 is set to the bottom of molding room 31 Portion.Container molding 311 may be, for example, a moulding cylinder, and as shown in figure 11, the bottom of molding room 31 is offered for container molding is arranged 311 opening, the opening match with the section of container molding 311, if for example, container molding 311 is circular moulding cylinder, Then the opening is circular open, if container molding 311 is rectangular moulding cylinder, opening is square aperture.In certain implementations In mode, the top of container molding 311 is opening, and the bottom of container molding 311 has a movable floor and the driving work The elevating mechanism of dynamic bottom plate lifting, the elevating mechanism may be, for example, piston structure.

In the foregoing, it is to be understood that, moulding material can be transferred to container molding 311 using powder supply mechanism 312, therefore, In the present embodiment, the application 3D printing equipment may also include the charge cask 313 for holding moulding material.Due to, it is described at Proximate matter material is, for example, metal powder, and charge cask 313 may be, for example, to contain powder cylinder, and as shown in figure 11, the bottom of molding room 31 opens up There is the opening for charge cask 313 is arranged, the opening and the section of charge cask 313 match, if for example, charge cask 313 be circular Sheng powder cylinder, then the opening is circular open, if charge cask 313 is rectangular Sheng powder cylinder, opening is side Shape is open.In some embodiments, the top of charge cask 313 is opening, and the bottom of charge cask 313 has a dump bottom Plate and the elevating mechanism of the driving movable floor lifting, the elevating mechanism may be, for example, piston structure.In practical application In, the Sheng powder cylinder as charge cask 313 is adjacent to the moulding cylinder as container molding 311, in this way, utilizing the behaviour of powder-laying roller Make, the metal powder in the Sheng powder cylinder can be transferred in moulding cylinder.

Energy radiating system 4 is for radiation energy to the shaping material layer to form shaped object.In the present embodiment, By taking SLM type 3D printing equipment as an example, energy radiating system 4 may be, for example, laser radiation system, and the laser radiation system can wrap It includes：Laser 41, galvanometer 42 and field lens 43, wherein may also include beam expanding lens 44, field lens between laser 41 and galvanometer 42 43 are set in molding room 31, and specifically, field lens 43 is set to the surface for being right against container molding 311, for producing laser 41 Raw laser beam is irradiated on the region to be printed of container molding 311.

For SLM type 3D printer, during it carries out 3D printing operation, laser light is generated by laser 41 Beam, the laser beam retrodeviated by beam expanding lens 44, galvanometer 42 and field lens 43 go to container molding 311 (such as：Moulding cylinder) Region to be printed on.Specifically, computer converts the three-dimensional data of object to the 2D data in section from level to level and is transferred to Printer, printer controls to be selected above the moulding material that laser beam is laid on the region to be printed of container molding 311 Property moulding material is irradiated, be located at container molding 311 region to be printed on shaping material layer through laser beam (swash The energy of light light beam is converted into thermal energy) after, moulding material melted by heat aftershaping completes current layer；It is driven using piston structure The movable floor of dynamic container molding 311 declines so that moulding material and the shaped object decline by moulding material institute support；It utilizes Piston structure driving charge cask 313 (such as：Contain powder cylinder) movable floor lifting, the moulding material (example in charge cask 313 Such as：Metal powder) it overflows；Using powder supply mechanism 312 (such as：Powder-laying roller) moulding material overflowed in charge cask 313 is turned It moves on container molding 311, to cover a formable layer material layer on the current layer of shaped object in container molding 311；Afterwards Continuous, 3D printing equipment controls laser beam according to the data of a new layer cross section and selectively shines new shaping material layer It penetrates, is bonded with the shaped article (that is, previous layer cross section) under it after new shaping material layer melted by heat.In this way, this reciprocal mistake Journey realizes successively cycle until whole object is molded.

The gas-recycling plant disclosed in the present application be used for molding room 31 provide flowing protective gas so that at Moulding material and shaped object in type room 31 are in protective atmosphere.In the present embodiment, the gas-recycling plant includes Gas handling system, outlet system and gas flow loop.

The gas handling system includes the first air intake structure 11 and the second air intake structure 12, wherein the first air intake structure 11 is set In the first side of molding room 31, the air inlet of the first air intake structure 11 towards the container molding 311 in molding room 31, second into Depressed structure 12 is set to the first side of molding room and positioned at 11 top of the first air intake structure, the air inlet court of the second air intake structure 12 It is located at the field lens 43 in molding room 31 into laser radiation system to the optical path between container molding 311.

Referring to Fig. 6, being shown as the sectional view of the first air intake structure 11.In conjunction with Figure 11 and Fig. 6, in the present embodiment, the One air intake structure 11 is set to the bottom of molding room 31, the first air intake structure 11 have a connector and with the connector phase To air inlet, the connector is connected to the circulation line in the gas flow loop, and the air inlet is right against container molding 311, in this way, by the connector receive circulation line be sent into Lai gas and will directly be made by the air inlet after gas transport For container molding 311.

Particularly, in the present embodiment, from the connector of the first air intake structure 11 (connector and circulation line phase Even) on the direction of air inlet (air inlet with container molding 311 opposite), the width of the first air intake structure 11 gradually increases And its height is gradually reduced.The so design of the structure of first air intake structure 11 is considered based on following：First air intake structure 11 Width gradually increases to adapt to the size of container molding 311 on the width.For example, container molding 311 is a moulding cylinder, that , the width of the first air intake structure 11 is gradual to be increased until in the end (that is, air inlet above-mentioned) of the first air intake structure 11 Width be more than or equal to as container molding 311 moulding cylinder diameter so that by the first air intake structure 11 feeding Lai gas The coverage area of body can be fully contemplated by entire container molding 311.In some embodiments, the end of the first air intake structure 11 It may include a straight-through section.The height of first air intake structure 11 gradually decreases, and essentially consists in and plays the role of gathering air-flow, by One air intake structure 11 is sent into the gas come and may act on container molding 311, can blow off and be attached on molding current layer or periphery Moulding material or the part moulding material that volatilizees due to heated.Wherein, described to be attached on molding current layer or periphery Moulding material, refer to：In forming process, certain part moulding materials on wanting molding current layer side also can be because of portion Divide by the radiation energy of energy radiating system and partly melts, though certain part moulding materials are not affected by energy radiating system Radiation is it is also possible to be attached on current layer.The part moulding material of the volatilization refers to：In forming process, energy spoke The shaping material layer in system radiation energy to container molding 311 is penetrated, the part in the shaping material layer is volatilized because heated, It is suspended in the top of container molding 311.Therefore, the height of the first air intake structure 11 may be designed as gradually decreasing, and can effectively play Gather the effect of air-flow, accelerate flowing of the air-flow in the first air intake structure 11, more conducively to blow off be attached to it is molding current The moulding material on layer or periphery or the part moulding material to volatilize because heated, it is ensured that the cleaning of molding current layer, with profit In the molding effect of succeeding layer.

In the present embodiment, first air inlet diversion member can be set in the inside of the first air intake structure 11.Specifically, first Air intake structure 11 is internally provided with the first air inlet diversion member 111, can be in the first air inlet by the first air inlet diversion member 111 The inside of structure 11 forms multiple airintake wind-tunnels.As shown in fig. 6, the first air inlet diversion member 111 in the first air intake structure 11 May be, for example, air inlet flow deflector, the air inlet flow deflector is mutually fitted in height and length with the overall structure of the first air intake structure 11 Match.Specifically, in length, from the connector to the direction of air inlet of the first air intake structure 11, air inlet flow deflector 111 is gradually It extends out.By taking Fig. 6 as an example, it is equipped with 5 air inlet flow deflectors in the first air intake structure 11, wherein a central air inlet flow deflector To be centrally located, the air inlet flow deflector 111 for being respectively in both sides then gradually extends out, air inlet flow deflector 111 using structure so and It is laid out, and the inlet channel in the first air intake structure 11 can be divided to form multiple airintake wind-tunnels, and may make each air inlet wind Road is uniformly distributed so that the air-flow in each airintake wind-tunnel is balanced.7 are please referred to, the air-flow being shown as in the first air intake structure 11 is walked To schematic diagram.As shown in fig. 7, the air-flow relative equilibrium in the multiple airintake wind-tunnels formed by air inlet flow deflector 111, flow velocity are equal It is even.

First air intake structure is additionally provided with the first flase floor at its air inlet.In the present embodiment, in the first air intake structure The first flase floor 113 is equipped at 11 air inlet, the first flase floor 113 is equipped with the first air inlet grille.Specifically, the first flase floor Multiple air inlet grilles are uniformly provided on 113, particularly, the thickness of the first flase floor 113 is greater than opening for the first air inlet grille Mouth width dimensions, in this way, single first air inlet grille can inherently form the small air duct of air-flow with certain length.As shown in fig. 6, First air inlet grille is the air inlet grid of rectangular section, and the length of the air inlet grid is greater than the diagonal line length of the air inlet grid Degree.Certainly, the first air inlet grille is not limited thereto, and in other embodiments, first air inlet grille may be, for example, round cuts The air inlet circular hole in face, the length of the air inlet circular hole are greater than the diameter of the air inlet circular hole.Alternatively, first air inlet grille can The for example, air inlet elliptical aperture of elliptic cross-section, the length of the air inlet elliptical aperture are greater than the long axis of the air inlet elliptical aperture. Alternatively, first air inlet grille may be, for example, the air inlet hexagonal hole of regular hexagonal section, the air inlet hexagonal hole Length is greater than the diagonal length of the air inlet hexagonal hole.In practical applications, the first air intake structure 11 is absolute construction, It can be installed at the air inlet of the first air intake structure for example, by modes such as screw locking or buckles.

2 are please referred to Fig.1, the sectional view of the second air intake structure 12 in Figure 11 is shown as.In conjunction with Figure 11 and Figure 12, in this implementation In example, the second air intake structure 12 is set to the top of molding room 31, connector and the gas flow loop of the second air intake structure 12 In circulation line connection, the air inlet of the second air intake structure 12 is right against the field lens 43 in laser radiation system, in this way, by the Two air intake structures 12 receive circulation line and are sent into the gas come and gas is directly acted on field lens 43.

From the connector (connector is connected with circulation line) of the second air intake structure 12 to the air inlet (air inlet It is opposite at field lens 43) direction on, the width of the second air intake structure 12 gradually increases and its height is gradually reduced.Second air inlet The width of structure 12 gradually increases can increase air inlet face so that by the second air intake structure 12 be sent into Lai gas covering Range can be fully contemplated by entire field lens 43.The height of second air intake structure 12 gradually decreases, and essentially consists in play and gathers air-flow Effect, the gas come is sent by the second air intake structure 12 and may act on field lens 43, can will be positioned at field lens 43 to container molding 311 Between the moulding material that volatilizees due to heated blow off be attached on field lens 43 to avoid it or by be attached on field lens 43 at Some or all of proximate matter material is blown off.It should be noted that in other embodiments, if the energy radiating system is electron beam Scanning system, the electron-beam scanning system can to the container molding radiation electric beamlet, then, second air intake structure Air inlet then can be towards on the electron beam scan path of the electron-beam scanning system.

In the present embodiment, second air inlet diversion member can be set in the inside of the second air intake structure 12.Specifically, second Air intake structure 12 is internally provided with the second air inlet diversion member 121, can be in the second air inlet by the second air inlet diversion member 121 The inside of structure 12 forms multiple airintake wind-tunnels.As shown in Figure 10, the second air inlet diversion member 121 in the second air intake structure 12 May be, for example, air inlet flow deflector, the air inlet flow deflector is mutually fitted in height and length with the overall structure of the second air intake structure 12 Match.Specifically, in length, from the connector to the direction of air inlet of the second air intake structure 12, air inlet flow deflector 121 is gradually It extends out.By taking Figure 12 as an example, it is equipped with 3 air inlet flow deflectors in the second air intake structure 12, wherein a central air inlet flow deflector To be centrally located, the air inlet flow deflector for being respectively in both sides then gradually extends out, the effect of air inlet flow deflector be to divide formed it is multiple Airintake wind-tunnel simultaneously makes each airintake wind-tunnel be uniformly distributed so that the air-flow in each airintake wind-tunnel is balanced.In addition, certain In embodiment, in the end of air inlet flow deflector 121 there is a water conservancy diversion to lead directly to section.In height, the height of air inlet flow deflector 121 It is highly consistent with the second air intake structure 12, that is, the bottom of air inlet flow deflector 121 is connected to the bottom surface of the second air intake structure 12, The top of air inlet flow deflector 121 is connected to the top surface of the second air intake structure 12.

Second air intake structure is additionally provided with the second flase floor 123 at its air inlet, and the second flase floor 123 is equipped with the second air inlet Lattice.Specifically, multiple air inlet grilles are uniformly provided on the second flase floor 123, particularly, the thickness of the second flase floor 123 It is greater than the opening width size of the second air inlet grille, in this way, single second air inlet grille can inherently be formed with certain length The small air duct of air-flow.As shown in figure 12, the second air inlet grille is the air inlet grid of rectangular section, and the length of the air inlet grid is greater than The catercorner length of the air inlet grid.Certainly, the second air inlet grille is not limited thereto, in other embodiments, described Two air inlet grilles may be, for example, the air inlet circular hole of circular cross-section, and the length of the air inlet circular hole is greater than the straight of the air inlet circular hole Diameter.Alternatively, second air inlet grille may be, for example, the air inlet elliptical aperture of elliptic cross-section, the length of the air inlet elliptical aperture is big In the long axis of the air inlet elliptical aperture.Alternatively, second air inlet grille may be, for example, the air inlet regular hexagon of regular hexagonal section Hole, the length of the air inlet hexagonal hole are greater than the diagonal length of the air inlet hexagonal hole.In practical applications, Two air intake structures 12 be absolute construction, can be installed on for example, by modes such as screw locking or buckles the second air intake structure into At gas port.

In the second air intake structure 12 shown in above Figure 12, from the connector of the second air intake structure 12 to air inlet Direction on, the width of the second air intake structure 12 gradually increases and its height is gradually reduced, but is not limited thereto, in certain realities It applies in mode, if the thickness of 31 second side of molding room is larger, the second air intake structure 12 can also add one section of straight-through portion (this Sample, the second air intake structure for having additional straight-through portion is similar with the first air intake structure 11 ' in Fig. 8, and details are not described herein), this If sample, the second flase floor 123 then may be disposed at the air inlet for the straight-through portion added.

Since the second air intake structure 12 is set to the top of molding room 31, for ease of the flowing of protective gas, in this implementation Further include the flow-guiding structure being oppositely arranged with the air inlet of the second air intake structure 12 in example.3 are please referred to Fig.1, is shown as in Figure 10 The sectional view at the top of opposite molding room.As shown in figure 13, the flow-guiding structure 14 in the present embodiment is set to second in molding room 31 The intersection of side and top surface, in the present embodiment, flow-guiding structure 14 may be, for example, deflector structure, in certain embodiments In, cone structure that flow-guiding structure 14 can be made of multiple deflectors.Using the flow-guiding structure 14, may make by the second air inlet The gas that structure 12 is sent out is guided to downwards the bottom of molding room 31 via flow-guiding structure 14.But it is not limited thereto, at other In embodiment, flow-guiding structure 14 also can such as arcwall face structure or spherical structure.

Referring to Fig. 9, in the present embodiment, the outlet system includes two air outlet structures 13, two air outlet structures 13 It is set to the bottom of molding room 31, the setting and towards the molding in molding room 31 parallel of two gas outlets in two air outlet structures Container 311.Using air outlet structure 13, it can receive the gas in molding room 31 and smoothly take it out of.

4 are please referred to Fig.1, the gas-recycling plant for being shown as 3D printing device configuration in Figure 10 is walked in the indoor air-flow of molding Direction view.As shown in figure 14, in the present embodiment, the gas that the first air intake structure 11 is sent into is guided to after acting on container molding Air outlet structure 13 is simultaneously discharged by air outlet structure 13, and the gas that the second air intake structure 12 is sent into acts on energy radiating system Through being guided to air outlet structure 13 downwards by flow-guiding structure 14 and being discharged by air outlet structure 13 after field lens.

In the 3D printing equipment of the present embodiment, using the gas-recycling plant of offer, by wind turbine driving gas via following Endless tube road is transmitted separately to the first air intake structure 11 and the second air intake structure, and gas passes through the first air intake structure 11 and second respectively Air intake structure 12 provides the protective gas of flowing so that at moulding material and shaped object in molding room 31 to molding room 31 In protective atmosphere, and, the protective gas in molding room 31 is back to purification system via the second air intake structure 12 and circulation line System is input to after carrying out purification filtering in molding room 31 again, is recycled to form protective gas.Meanwhile first air intake structure 11 gases provided can be done directly on container molding 311, for carrying out molding shaped article progress in container molding 311 Cleaning, it is ensured that shaped article has good molding effect.The gas that second air intake structure 12 provides can be done directly on field lens 43, by being blown off to the moulding material to volatilize because heated between container molding 311 positioned at field lens 43 field can be attached to avoid it It is blown off on mirror 43 or by some or all of the moulding material being attached on field lens 43, it is ensured that the performance of optical beam path.

The principles and effects of the application are only illustrated in above-described embodiment, not for limitation the application.It is any ripe Know the personage of this technology all can without prejudice to spirit herein and under the scope of, carry out modifications and changes to above-described embodiment.Cause This, those of ordinary skill in the art is complete without departing from spirit disclosed herein and institute under technological thought such as At all equivalent modifications or change, should be covered by claims hereof.

Claims

1. a kind of gas-recycling plant is applied in 3D printing equipment, the 3D printing equipment includes molding room and is set to institute State the container molding inside molding room, which is characterized in that the gas-recycling plant includes：

Gas handling system includes the first air intake structure set on molding room's first side and air inlet towards the container molding And the first side set on the molding room and the second air intake structure above first air intake structure；

Outlet system, including an at least air outlet structure, an at least air outlet structure are set to the second side of the molding room；With And

Gas flow loop, including be connected to first, second air intake structure and at least circulation line of an air outlet structure and The purification system being set in the circulation line.

2. gas-recycling plant according to claim 1, which is characterized in that extremely from the connector of first air intake structure On the direction of air inlet, the width of first air intake structure gradually increases and its height is gradually reduced.

3. gas-recycling plant according to claim 1, which is characterized in that first air intake structure includes the expansion to connect Exhibition portion and straight-through portion, wherein from the connector to the direction of air inlet of first air intake structure, the width of the extension Gradually increase and its height is gradually reduced.

4. gas-recycling plant according to claim 2 or 3, which is characterized in that the inside of first air intake structure is set There is the first air inlet diversion member, is used to form multiple airintake wind-tunnels.

5. gas-recycling plant according to claim 4, which is characterized in that extremely from the connector of first air intake structure On the direction of air inlet, the first air inlet diversion member gradually extends out.

6. gas-recycling plant according to claim 1, which is characterized in that at the air inlet of first air intake structure Equipped with the first flase floor, first flase floor is equipped with the first air inlet grille.

7. gas-recycling plant according to claim 6, which is characterized in that the thickness of first flase floor is big In the opening width size of first air inlet grille.

8. gas-recycling plant according to claim 1, which is characterized in that extremely from the connector of second air intake structure On the direction of air inlet, the width of second air intake structure gradually increases and its height is gradually reduced.

9. gas-recycling plant according to claim 8, which is characterized in that second air intake structure is internally provided with Two air inlet diversion members, are used to form multiple airintake wind-tunnels.

10. gas-recycling plant according to claim 9, which is characterized in that from the connector of second air intake structure To the direction of air inlet, the second air inlet diversion member gradually extends out.

11. gas-recycling plant according to claim 1, which is characterized in that in the air inlet of second air intake structure Place is equipped with the second flase floor, and second flase floor is equipped with the second air inlet grille.

12. gas-recycling plant according to claim 11, which is characterized in that the thickness of second flase floor is wanted More than the opening width size of second air inlet grille.

13. gas-recycling plant according to claim 1, which is characterized in that the gas outlet of an at least air outlet structure Towards the container molding.

14. gas-recycling plant according to claim 13, which is characterized in that the outlet system goes out depressed including two Structure, two gas outlets in described two air outlet structures are arranged parallel.

15. gas-recycling plant according to claim 13, which is characterized in that the second side is opposite with first side The air inlet of setting, at least gas outlet of an air outlet structure and first air intake structure is located at the container molding Opposite sides.

16. the gas-recycling plant according to claim 13 or 14, which is characterized in that an at least air outlet structure it is interior Portion is equipped with outlet diversion member, forms multiple outgassing wind-tunnels.

17. gas-recycling plant according to claim 16, which is characterized in that the outlet in an at least air outlet structure Mouthful angle is formed with outlet passageway, the outlet diversion member has water conservancy diversion corner for being guided gas by gas outlet to going out In gas channel.

18. gas-recycling plant according to claim 1, which is characterized in that further include and the second air intake structure phase To the flow-guiding structure of setting, it is set to the intersection of second side and top surface in the Photocopy Room.

19. gas-recycling plant according to claim 1, which is characterized in that the purification system includes wind turbine and filter core.

20. a kind of 3D printing equipment, which is characterized in that including：

Molding room；

Container molding is set in the molding room；

Powder supply mechanism is set in the molding room, for forming shaping material layer to be formed on the container molding；

Energy radiating system, for radiation energy to the shaping material layer to form shaped object；And

Gas-recycling plant as described in any one of claim 1 to 19.

21. 3D printing equipment according to claim 20, which is characterized in that the energy radiating system is laser emission system System, including laser, galvanometer and field lens, the field lens is towards the container molding；The air inlet court of second air intake structure To the field lens to the optical path between the container molding.

22. 3D printing equipment according to claim 20, which is characterized in that the energy radiating system is electronics beam scanning System is used for the container molding radiation electric beamlet；The air inlet of second air intake structure is towards the electronics beam scanning The electron beam scan path of system.

23. a kind of gas-recycling plant is applied in 3D printing equipment, the 3D printing equipment includes molding room and is set to institute State the container molding inside molding room, which is characterized in that the gas-recycling plant includes：

Gas handling system includes the first air intake structure set on molding room's first side, the air inlet of first air intake structure Mouthful towards the container molding, the first air inlet water conservancy diversion of first air intake structure being internally provided with for forming multiple airintake wind-tunnels Element；

Gas flow loop, including be connected to first air intake structure and at least circulation line of an air outlet structure and be set to Purification system in the circulation line.

24. gas-recycling plant according to claim 23, which is characterized in that from the connector of first air intake structure To the direction of air inlet, the width of first air intake structure gradually increases and its height is gradually reduced.

25. gas-recycling plant according to claim 23, which is characterized in that first air intake structure includes connecting Extension and straight-through portion, wherein from the connector to the direction of air inlet of first air intake structure, the width of the extension Degree gradually increases and its height is gradually reduced.

26. the gas-recycling plant according to claim 24 or 25, which is characterized in that from the company of first air intake structure It is interfaced on the direction of air inlet, the first air inlet diversion member gradually extends out.

27. gas-recycling plant according to claim 23, which is characterized in that in the air inlet of first air intake structure Place is equipped with the first flase floor, and first flase floor is equipped with the first air inlet grille.

28. gas-recycling plant according to claim 27, which is characterized in that the thickness of first flase floor is wanted More than the opening width size of first air inlet grille.

29. gas-recycling plant according to claim 23, which is characterized in that the gas handling system further includes the second air inlet Structure, second air intake structure are set to the first side of the molding room and above first air intake structures.

30. gas-recycling plant according to claim 29, which is characterized in that from the connector of second air intake structure To the direction of air inlet, the width of second air intake structure gradually increases and its height is gradually reduced.

31. gas-recycling plant according to claim 30, which is characterized in that second air intake structure is internally provided with Second air inlet diversion member, is used to form multiple airintake wind-tunnels.

32. gas-recycling plant according to claim 31, which is characterized in that from the connector of second air intake structure To the direction of air inlet, the second air inlet diversion member gradually extends out.

33. gas-recycling plant according to claim 29, which is characterized in that in the air inlet of second air intake structure Place is equipped with the second flase floor, and second flase floor is equipped with the second air inlet grille.

34. gas-recycling plant according to claim 33, which is characterized in that the thickness of second flase floor is wanted More than the opening width size of second air inlet grille.

35. gas-recycling plant according to claim 23, which is characterized in that the gas outlet of an at least air outlet structure Towards the container molding.

36. gas-recycling plant according to claim 35, which is characterized in that the outlet system goes out depressed including two Structure, two gas outlets in described two air outlet structures are arranged parallel.

37. gas-recycling plant according to claim 35, which is characterized in that the second side is opposite with first side The air inlet of setting, at least gas outlet of an air outlet structure and first air intake structure is located at the container molding Opposite sides.

38. the gas-recycling plant according to claim 35 or 36, which is characterized in that an at least air outlet structure it is interior Portion is equipped with outlet diversion member, forms multiple outgassing wind-tunnels.

39. according to the gas-recycling plant described in claim 38, which is characterized in that the outlet in an at least air outlet structure Mouthful angle is formed with outlet passageway, the outlet diversion member has water conservancy diversion corner for being guided gas by gas outlet to going out In gas channel.

40. gas-recycling plant according to claim 23, which is characterized in that further include and second air intake structure The flow-guiding structure that air inlet is oppositely arranged is set to the intersection of second side and top surface in the molding room.

41. gas-recycling plant according to claim 23, which is characterized in that the purification system includes wind turbine and filter Core.

42. a kind of 3D printing equipment, which is characterized in that including：

Molding room；

Container molding is set in the molding room；

Gas-recycling plant as described in any one of claim 23 to 41.