CN103073174A - 3D laser printing device taking low-melting-point glass powder as raw material - Google Patents

3D laser printing device taking low-melting-point glass powder as raw material Download PDF

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Publication number
CN103073174A
CN103073174A CN2013100529307A CN201310052930A CN103073174A CN 103073174 A CN103073174 A CN 103073174A CN 2013100529307 A CN2013100529307 A CN 2013100529307A CN 201310052930 A CN201310052930 A CN 201310052930A CN 103073174 A CN103073174 A CN 103073174A
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CN
China
Prior art keywords
glass powder
laser printing
laser
3d laser
3d
Prior art date
Application number
CN2013100529307A
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Chinese (zh)
Inventor
张倩
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苏州百纳思光学科技有限公司
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Priority to CN2013100529307A priority Critical patent/CN103073174A/en
Publication of CN103073174A publication Critical patent/CN103073174A/en

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Abstract

The invention relates to a 3D laser printing device which is a 3D laser printing head taking low-melting-point glass powder as a raw material. A common 3D laser printing device has a larger volume and is inconvenient to mount and debug, because the melting temperature of glass or metal generally exceeds 1000 DEG C and a high-power carbon dioxide laser or solid laser is fixed in the position of a printing head. The invention provides the 3D laser printing device taking the low-melting-point phosphate glass as the raw material. The transformation temperature Tg of the selected phosphate glass is below 450 DEG C and the laser sintering temperature is within 800 DEG C, so that sufficient power density can be generated by using multiple sets of commercial fiber lasers for irradiating a sintering point, so as to realize the melting cast molding of glass. The 3D laser printing device has the advantages of high energy conversion efficiency, compact structure and high reliability.

Description

A kind of take the low melting glass powder as raw-material 3D laser print apparatus

Technical field

The present invention relates to a kind of 3D laser print apparatus, relate in particular to a kind of take the low melting glass powder as raw-material 3D Laser Printing head.

Background technology

The 3D printer is a kind of in recent years popular technology, and it is widely used in design field, and especially industrial design can be finished the printing of a mould within a few hours, saved a lot of products to the development time in market.Use the 3D printer object dimensional model that CAD technology (CAD) is made directly can be printed with the form of solid.Common 3D printer uses plastics to be starting material, generates solid-state entity with the form of piling up thin layer.Be that software passes through CAD technology (CAD) and finishes a series of digital slices, and the information of these sections is sent on the 3D printer, the latter can spray tamanori at the plastic powders layer as 2 dimensions are printed, and continuous slim aspect is stacked up, until a solid body moulding.Other plastic powders curing has the fused deposition modeling method, and namely then molten plastic in shower nozzle just forms thin layer by the mode that deposits plastic optical fibre.Or by laser sintered method the plastic powders founding is become designated shape.

Take the plastics limitation certain as printed material has, such as just using plastics in the higher application of a few thing temperature.Use glass or metallic substance to become designated shape with laser sintered method founding, but the common price of this 3D laser printer is extremely expensive, and bulky.Main because the temperature of fusion of glass or metal is higher, usually surpass 1000 degree, need powerful carbon dioxide laser or solid statelaser to be fixed on the position of printhead, this class laser apparatus volume is larger, installment and debugging inconvenience.Here need to prove that low-melting metal-powder is inflammable in air, thereby do not have the practicality that 3D prints.

Low in order to solve plastics 3D printed material use temperature, and plain metal and glass 3D printer volume are large and the high problem of cost, and the present invention proposes the low-melting phosphate glass of a kind of use (Phosphate glass) is raw-material 3D laser print apparatus.The transition temperature Tg of selected phosphate glass is less than 450 degree, and its laser sintered temperature thereby jointly is radiated at sintering point with the optical fiber laser of several groups of commercializations and just can produces enough power densities with the fusion cast process of realization glass in 800 degree.Optical fiber laser of the present invention is with the laser apparatus of doped rare earth element glass optical fiber as gain media, and it is to develop on the basis of fiber amplifier.Under the effect of pump light, very easily form high power density in the optical fiber, cause the laser levels " population inversion " of working-laser material, when suitable adding positive feedback loop (formation resonator cavity) just can form laser generation output.Optical fiber laser is compared with gas laser with traditional solid has following advantage, as: effciency of energy transfer is high, compact construction, and reliability is high.

Description of drawings

Fig. 1 is that the axle that waits of 3D Laser Printing head is surveyed three-dimensional view;

Fig. 2 is the sectional view of 3D Laser Printing head.

Reference numeral wherein

1 is collimating optical system;

2 is the glass powder jet apparatus;

3 is the internal layer cavity;

4 is the low melting glass powder;

5 is the glass powder spout;

6 is fixed support;

7 is sintering point;

8 is the gain fibre pipeline.

Description of drawings

Fig. 1 is that the axle that waits of 3D Laser Printing head is surveyed three-dimensional view;

Fig. 2 is the sectional view of 3D Laser Printing head.

Reference numeral wherein

1 is collimating optical system;

2 is the glass powder jet apparatus;

3 is the internal layer cavity;

4 is the low melting glass powder;

5 is the glass powder spout;

6 is fixed support;

7 is sintering point;

8 is the gain fibre pipeline.

Embodiment

The below makes more detailed description to invention, and same tag represents identical parts.For better understanding, the parts shown in the accompanying drawing are schematically showing of drawing in proportion, and namely the parts of this accompanying drawing do not represent full-size(d), and these full-size(d)s all are known for those of ordinary skills, therefore here are not described in detail.

Optical fiber laser among the present invention adopts rare earth-doped fiber as gain media, and wavelength is 1460nm, and output rating is 300w ~ 500w.That the axle that waits of 3D Laser Printing head is surveyed three-dimensional view with reference to figure 1.1 is the collimating optical system of optical fiber laser, and 8 is its gain fibre pipeline.The pumping source of optical fiber laser and coupling optical system are arranged in other positions of 3D printer, are connected with the 3D printhead by gain fibre pipeline 8.Optical fiber laser has four groups, by fixed support 6 symmetrical placement around glass powder jet apparatus 2.Its four groups of laser beams are all aimed at sintering point 7 with glass powder spout 5.The material of fixed support 6 is stainless steel, and its structure is processed into by the CNC precision lathe, guarantees the accurate location of laser apparatus collimating optical system.The direction of four groups of laser apparatus is all passed through calibration makes the locus deviation control of its optical axis and sintering point 7 in 0.05mm.Every a branch of laser at 50% Gaussian Energy Distribution diameter control of sintering point 7 less than 1mm.If so all adopt the optical fiber laser of 500w output rating, then four bundle laser are about 1000w/ ㎜ 2 at the peak power density of sintering point, and the glass powder that can make ejection is in utmost point Fast Sintering in the short period of time.Adopted four groups of optical fiber lasers in embodiment of the present invention and accompanying drawing thereof, if in fact adopt the more optical fiber laser of high-output power, the quantity of laser apparatus can be reduced to three groups or two groups.No matter adopt several groups of optical fiber lasers, their output rating should be consistent, and the collimating optical system of each laser apparatus is symmetric around the glass powder jet apparatus, and each laser beam all is focused on the sintering point.

Sectional view with reference to 3D Laser Printing head among the figure 2.Glass powder jet apparatus 2 is made of two-layer cavity, and low melting glass powder 4 is equipped with in its internal layer cavity 3 inside.Gap UNICOM between outlet and the outer cavity is arranged at the bottom of internal layer cavity, and spout 5 is processed in the bottom of outer cavity.The particle diameter of glass powder 4 is 10 ~ 50um.When the 3D working of laser printer, high pressure gas are filled in the gap between the two-layer cavity, and gas flows out from spout 5.Gaseous tension is controlled between 1.5 to 2 normal atmosphere.The inner diameter of spout 5 is about 2mm.When gas flows out from spout 5 at a high speed, drive the glass powder of cavity 3 belows outlet together by spout 5 ejections.Glass powder jet apparatus 2 and internal structure thereof are all made by stainless steel, and wherein internal layer cavity 3 links to each other with the conduit that the glass powder box is housed.Spout 5 is about 20mm to the position of laser sintered point 7.

During the 3D working of laser printer, printhead is in spout attitude vertically downward all the time, and guarantee falls into the sintering point position by the low melting glass powder of spout ejection like this.When print speed need to be accelerated, then to improve the gaseous tension of glass powder jet apparatus inside and the output rating of optical fiber laser.Because the easy deliquescence of low melting glass powder of phosphate system is so need to add siccative in powder stock box inside.An other 3D prints rear glass powder residual in the powderject device will all drive eliminating by high pressure gas, otherwise can stop up spout behind the glass powder deliquescence.

The 3D printer is a kind of in recent years popular technology, and it is widely used in design field, and especially industrial design can be finished the printing of a mould within a few hours, saved a lot of products to the development time in market.Use the 3D printer object dimensional model that CAD technology (CAD) is made directly can be printed with the form of solid.Common 3D printer uses plastics to be starting material, generates solid-state entity with the form of piling up thin layer.Be that software passes through CAD technology (CAD) and finishes a series of digital slices, and the information of these sections is sent on the 3D printer, the latter can spray tamanori at the plastic powders layer as 2 dimensions are printed, and continuous slim aspect is stacked up, until a solid body moulding.Other plastic powders curing has the fused deposition modeling method, and namely then molten plastic in shower nozzle just forms thin layer by the mode that deposits plastic optical fibre.Or by laser sintered method the plastic powders founding is become designated shape.

Take the plastics limitation certain as printed material has, such as just using plastics in the higher application of a few thing temperature.Use glass or metallic substance to become designated shape with laser sintered method founding, but the common price of this 3D laser printer is extremely expensive, and bulky.Main because the temperature of fusion of glass or metal is higher, usually surpass 1000 degree, need powerful carbon dioxide laser or solid statelaser to be fixed on the position of printhead, this class laser apparatus volume is larger, installment and debugging inconvenience.Here need to prove that low-melting metal-powder is inflammable in air, thereby do not have the practicality that 3D prints.

Low in order to solve plastics 3D printed material use temperature, and plain metal and glass 3D printer volume are large and the high problem of cost, and the present invention proposes the low-melting phosphate glass of a kind of use (Phosphate glass) is raw-material 3D laser print apparatus.The transition temperature Tg of selected phosphate glass is less than 450 degree, and its laser sintered temperature thereby jointly is radiated at sintering point with the optical fiber laser of several groups of commercializations and just can produces enough power densities with the fusion cast process of realization glass in 800 degree.Optical fiber laser of the present invention is with the laser apparatus of doped rare earth element glass optical fiber as gain media, and it is to develop on the basis of fiber amplifier.Under the effect of pump light, very easily form high power density in the optical fiber, cause the laser levels " population inversion " of working-laser material, when suitable adding positive feedback loop (formation resonator cavity) just can form laser generation output.Optical fiber laser is compared with gas laser with traditional solid has following advantage, as: effciency of energy transfer is high, compact construction, and reliability is high.

Embodiment

The below makes more detailed description to invention, and same tag represents identical parts.For better understanding, the parts shown in the accompanying drawing are schematically showing of drawing in proportion, and namely the parts of this accompanying drawing do not represent full-size(d), and these full-size(d)s all are known for those of ordinary skills, therefore here are not described in detail.

Optical fiber laser among the present invention adopts rare earth-doped fiber as gain media, and wavelength is 1460nm, and output rating is 300w ~ 500w.That the axle that waits of 3D Laser Printing head is surveyed three-dimensional view with reference to figure 1.1 is the collimating optical system of optical fiber laser, and 8 is its gain fibre pipeline.The pumping source of optical fiber laser and coupling optical system are arranged in other positions of 3D printer, are connected with the 3D printhead by gain fibre pipeline 8.Optical fiber laser has four groups, by fixed support 6 symmetrical placement around glass powder jet apparatus 2.Its four groups of laser beams are all aimed at sintering point 7 with glass powder spout 5.The material of fixed support 6 is stainless steel, and its structure is processed into by the CNC precision lathe, guarantees the accurate location of laser apparatus collimating optical system.The direction of four groups of laser apparatus is all passed through calibration makes the locus deviation control of its optical axis and sintering point 7 in 0.05mm.Every a branch of laser at 50% Gaussian Energy Distribution diameter control of sintering point 7 less than 1mm.If so all adopt the optical fiber laser of 500w output rating, then four bundle laser are about 1000w/ ㎜ 2 at the peak power density of sintering point, and the glass powder that can make ejection is in utmost point Fast Sintering in the short period of time.Adopted four groups of optical fiber lasers in embodiment of the present invention and accompanying drawing thereof, if in fact adopt the more optical fiber laser of high-output power, the quantity of laser apparatus can be reduced to three groups or two groups.No matter adopt several groups of optical fiber lasers, their output rating should be consistent, and the collimating optical system of each laser apparatus is symmetric around the glass powder jet apparatus, and each laser beam all is focused on the sintering point.

Sectional view with reference to 3D Laser Printing head among the figure 2.Glass powder jet apparatus 2 is made of two-layer cavity, and low melting glass powder 4 is equipped with in its internal layer cavity 3 inside.Gap UNICOM between outlet and the outer cavity is arranged at the bottom of internal layer cavity, and spout 5 is processed in the bottom of outer cavity.The particle diameter of glass powder 4 is 10 ~ 50um.When the 3D working of laser printer, high pressure gas are filled in the gap between the two-layer cavity, and gas flows out from spout 5.Gaseous tension is controlled between 1.5 to 2 normal atmosphere.The inner diameter of spout 5 is about 2mm.When gas flows out from spout 5 at a high speed, drive the glass powder of cavity 3 belows outlet together by spout 5 ejections.Glass powder jet apparatus 2 and internal structure thereof are all made by stainless steel, and wherein internal layer cavity 3 links to each other with the conduit that the glass powder box is housed.Spout 5 is about 20mm to the position of laser sintered point 7.

During the 3D working of laser printer, printhead is in spout attitude vertically downward all the time, and guarantee falls into the sintering point position by the low melting glass powder of spout ejection like this.When print speed need to be accelerated, then to improve the gaseous tension of glass powder jet apparatus inside and the output rating of optical fiber laser.Because the easy deliquescence of low melting glass powder of phosphate system is so need to add siccative in powder stock box inside.An other 3D prints rear glass powder residual in the powderject device will all drive eliminating by high pressure gas, otherwise can stop up spout behind the glass powder deliquescence.

Claims (6)

1. one kind take the low melting glass powder as raw-material 3D Laser Printing head, comprises two to four groups of optical fiber lasers and low melting glass powder jet apparatus.
2. 3D Laser Printing head according to claim 1 is characterized in that, employed low melting glass powder is phosphate system glass, and its transition temperature Tg value is less than 450 degree.
3. according to aforesaid right 1 and 3D Laser Printing head claimed in claim 2, it is characterized in that, each collimating optical system of organizing optical fiber laser is symmetric around the glass powder jet apparatus, and each laser beam converges on the glass sintering point of jet apparatus below.
4. according to the described 3D Laser Printing of any one in the claims head, it is characterized in that, the glass powder jet apparatus is made of two-layer cavity, its internal layer cavity is equipped with the low melting glass powder, gap UNICOM between outlet and the outer cavity is arranged at the bottom of internal layer cavity, and nozzle configuration is processed in the bottom of outer cavity.
5. according to the described 3D Laser Printing of any one in the claims head, it is characterized in that, during the 3D working of laser printer, fill high pressure gas between the two-layer cavity of glass powder jet apparatus inside, gas flows out at a high speed from spout, and the glass powder that drives simultaneously the outlet of internal layer cavity below sprays together.
6. according to the described 3D Laser Printing of any one in the claims head, it is characterized in that, during the 3D working of laser printer, printhead is in spout attitude vertically downward all the time, and guarantee falls into the sintering point position by the low melting glass powder of spout ejection like this.
CN2013100529307A 2013-02-19 2013-02-19 3D laser printing device taking low-melting-point glass powder as raw material CN103073174A (en)

Priority Applications (1)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103407296A (en) * 2013-07-29 2013-11-27 南京鼎科纳米技术研究所有限公司 Method for achieving high-melting-point material 3D printing through nanometer ink together with laser melting
CN103524022A (en) * 2013-09-22 2014-01-22 清华大学 Method for building desulfurization exhaust chimney based on three-dimensional (3D) printing and borosilicate glass
CN103894614A (en) * 2014-04-17 2014-07-02 机械科学研究总院先进制造技术研究中心 Metal material melt extrusion device based on high-frequency induction heating
CN104355531A (en) * 2014-10-29 2015-02-18 上海大学 3D (3-Dimensional) printing doped fiber preform rod preparation system
CN104658833A (en) * 2015-03-04 2015-05-27 刘君才 Method for manufacturing MCP (microchannel plate) for low-light-level night vision by 3D laser printer
WO2015172540A1 (en) * 2014-05-15 2015-11-19 东莞市亚美精密机械配件有限公司 Extrusion type metal flow 3d printer
CN105330177A (en) * 2015-11-27 2016-02-17 中国建筑材料科学研究总院 Method for preparing sealing glass prefabricated part by selective laser sintering
EP3124448A1 (en) * 2015-07-28 2017-02-01 IL Metronic Sensortechnik GmbH Method for producing blanks for sinter glass bodies for glass feed-throughs
US9896368B2 (en) 2014-04-25 2018-02-20 Massachusetts Institute Of Technology Methods and apparatus for additive manufacturing of glass
CN107973528A (en) * 2017-11-08 2018-05-01 沙河市远维电子科技有限公司 A kind of formula of 3D printing coloured glass product and preparation method thereof
WO2019138249A1 (en) * 2018-01-15 2019-07-18 Ortheia Limited Method of processing glass

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103407296A (en) * 2013-07-29 2013-11-27 南京鼎科纳米技术研究所有限公司 Method for achieving high-melting-point material 3D printing through nanometer ink together with laser melting
CN103524022A (en) * 2013-09-22 2014-01-22 清华大学 Method for building desulfurization exhaust chimney based on three-dimensional (3D) printing and borosilicate glass
CN103524022B (en) * 2013-09-22 2015-10-28 清华大学 Print and the desulfurization fume exhaust chimney method of construction of borosilicate glass based on 3D
CN103894614A (en) * 2014-04-17 2014-07-02 机械科学研究总院先进制造技术研究中心 Metal material melt extrusion device based on high-frequency induction heating
US10266442B2 (en) 2014-04-25 2019-04-23 Massachusetts Institute Of Technology Methods and apparatus for additive manufacturing of glass
US9896368B2 (en) 2014-04-25 2018-02-20 Massachusetts Institute Of Technology Methods and apparatus for additive manufacturing of glass
WO2015172540A1 (en) * 2014-05-15 2015-11-19 东莞市亚美精密机械配件有限公司 Extrusion type metal flow 3d printer
CN104355531A (en) * 2014-10-29 2015-02-18 上海大学 3D (3-Dimensional) printing doped fiber preform rod preparation system
CN104658833A (en) * 2015-03-04 2015-05-27 刘君才 Method for manufacturing MCP (microchannel plate) for low-light-level night vision by 3D laser printer
EP3124448A1 (en) * 2015-07-28 2017-02-01 IL Metronic Sensortechnik GmbH Method for producing blanks for sinter glass bodies for glass feed-throughs
CN105330177A (en) * 2015-11-27 2016-02-17 中国建筑材料科学研究总院 Method for preparing sealing glass prefabricated part by selective laser sintering
CN107973528A (en) * 2017-11-08 2018-05-01 沙河市远维电子科技有限公司 A kind of formula of 3D printing coloured glass product and preparation method thereof
WO2019138249A1 (en) * 2018-01-15 2019-07-18 Ortheia Limited Method of processing glass

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Application publication date: 20130501