CN107352999A - A kind of analog detection method of the laser sintered performance of 3D printing inorganic material powders - Google Patents

A kind of analog detection method of the laser sintered performance of 3D printing inorganic material powders Download PDF

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CN107352999A
CN107352999A CN201710602294.9A CN201710602294A CN107352999A CN 107352999 A CN107352999 A CN 107352999A CN 201710602294 A CN201710602294 A CN 201710602294A CN 107352999 A CN107352999 A CN 107352999A
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printing
inorganic material
material powders
laser
detection method
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卢超
杨仕清
史卫梅
詹朋璇
杨兴江
杨清学
梁桃华
邓朝广
孟奕峰
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Chengdu Polytechnic
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Chengdu Polytechnic
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Abstract

The invention discloses a kind of analog detection method of the laser sintered performance of 3D printing inorganic material powders, solves existing waste of material when large scale industry level 3D printer carries out the experiment test of early stage to 3D printing with inorganic material powders in the prior art, time-consuming, experimentation is cumbersome, is unfavorable for the problem of scientific experiment is efficiently carried out.The present invention is used as laser sintered equipment using general commercial laser engraving machine, periodically continued scanning is made to the 3D printing inorganic material powders being laid on laser engraving machine internal work platform glass plate, to realize the sintering of inorganic material powders, the curing molding situation of the inorganic powder after sintering is observed again, determines the 3D printing performance of 3D printing inorganic material powders.The inventive method is simple, easy to operate, can quickly carry out the simulation test of 3D printing inorganic material powders selective laser sintering performance, test sample dosage is few, and cost is low.

Description

A kind of analog detection method of the laser sintered performance of 3D printing inorganic material powders
Technical field
The invention belongs to the invention belongs to 3D printing technique field, and in particular to a kind of 3D printing inorganic material powders laser The analog detection method of sintering character.
Background technology
3D printing technique is increases material manufacturing technology, is being successively superimposed to realize the shaping work of 3D solid by material Skill, it is a kind of emerging rapid shaping technique.In recent years, 3D printing technique is quickly grown, and manufacture field is generated huge Influence, will turn into " internet+" with " a mainstay industry of made in China 2025 ", therefore, countries in the world with all strength Carry out the technology research and development, using with popularization.
One of core of 3D printing is the research and development of material, and material is the important substance basis of 3D printing technique, to the skill The development of art plays decisive role with application.Currently, for 3D printing material mainly include engineering plastics, photosensitive resin, Rubber type of material, metal material, ceramic material, in addition also gypsum material, wood materials, cellular biological material etc..Wherein, make pottery Ceramic material, gypsum material belong to solid inorganic thing material, such material with its high intensity, high temperature resistant, anticorrosive, good insulating, The features such as chemical stability is excellent and had a wide range of applications in modern industry field.However, the hardness of such material is high, fragility Greatly, fusing point is high, and its moulding processability is poor, need to be molded for complicated inorganic material device using complicated die, and its Mould development cost is high, cycle length, is unfavorable for the long-acting development of the industry.Currently, inorganic matter material is realized using 3D printing technique The three-dimensionally shaped of material is a kind of novel, efficient means.
The 3D printing shaping of solid inorganic thing material typically uses selective laser sintering (SLS) technology.3D printing is with inorganic The composition of thing powder mainly includes mineral powder and binding agent two parts, during laser sintered, utilizes high energy laser beam By the melting of low melting point binding agent or softening in inorganic material powders, mineral powder is set mutually to bond by the immersional wetting of liquid phase Together, cooling aftershaping obtains green part, then obtains final part after high temperature sintering removes binding agent.Utilize the work What skill realized ceramic material is formed without any mould, can solve the processing and forming problem of complicated ceramic component.Mineral powder The addition of middle binding agent is very crucial, and binding agent is very few to cause inorganic powder to bond loosely, and blank intensity is relatively low, forming parts It is more difficult；Binding agent excessive addition easily makes forming part serious in the degreasing sintered after-contraction of high temperature, is unfavorable for controlling the precision of part. Therefore, for 3D printing newly developed inorganic material powders material, laser sintering device need to be used to carry out its 3D printing performance The experiment test of early stage, to examine its industrial applicibility.
At present, commercial precinct laser sintering device is generally large-scale technical grade 3D printer, however, the type equipment It is expensive, volume weight is big, unit block is more, instrument parameter is more, operation is complex, maintenance cost is higher；Especially work The cavity size of industry level 3D printer is big, and powdering face is wide, is needed in precinct laser sintering 3D printing performance test experimentation The inorganic material powders of feather weight are consumed, each test experiments can cause the waste of powder body material, and economic and environment-friendly property is poor, and time-consuming Longer, experimentation is relatively complicated, is unfavorable for the efficient development of scientific experiment.
Therefore it provides a kind of analog detection method of the laser sintered performance of 3D printing inorganic material powders, simple quick, behaviour Make that the research and development technique of 3D printing inorganic material powders simply, can be simplified, reduce R＆D costs, accelerate research and development speed, become this Art personnel's urgent problem to be solved.
The content of the invention
Present invention solves the technical problem that it is：The simulation for providing a kind of laser sintered performance of 3D printing inorganic material powders is surveyed Method for testing, solves the experiment survey that the medium-and-large-sized technical grade 3D printer of prior art carries out early stage to 3D printing with inorganic material powders Existing waste of material during examination, time-consuming, and experimentation is cumbersome, is unfavorable for the problem of scientific experiment is efficiently carried out.
The technical solution adopted by the present invention is as follows：
The analog detection method of a kind of laser sintered performance of 3D printing inorganic material powders of the present invention, with common business By the use of laser engraving machine as laser sintered equipment, the 3D being laid on the laser engraving machine internal work platform glass plate is beaten Print inorganic material powders make periodically continued scanning, to realize the sintering of the inorganic material powders, observe the inorganic powder after sintering The curing molding situation at end, determine the 3D printing performance of the 3D printing inorganic material powders.
Further, following steps are specifically included：
Step 1：The computer-controlled program of the laser engraving machine is set, sets the laser head of laser engraving machine in 2D water Scanning range and sweep speed in plane；
Step 2：The 3D printing for intending test is laid in the internal work platform of the laser engraving machine with inorganic material powders Glass plate on；
Step 3：Start the laser head, laser head makees periodically continued scanning in the scanning range of setting, until institute The 3D printing stated in scanning range is fully completed sintering with inorganic powder；
Step 4：The curing molding situation of inorganic material powders after observation sintering, if curing molding works well, blank Intensity is high, compactness is good, shows that the laser sintered 3D printing of the 3D printing inorganic powder is functional.
Further, the laser head is CO2Laser, laser power scope are 20~40W.
Further, the scanning range is 50mm × 50mm.
Further, the sweep speed is 200~1000mm/s.
Further, the preparation of the 3D printing inorganic material powders comprises the following steps：
A：Weigh the raw material of the 3D printing inorganic material powders and be well mixed, obtain mixture；The raw material include with The component of lower parts by weight：Solid inorganic thing 20-60 parts, binding agent 10-30 parts, curing agent 2-8 parts, diluent 30-80 parts；
B：The mixture is placed in vacuum drying chamber and is dried in vacuo, completion is dried and dry fill is obtained after natural cooling Divide, finely dispersed 3D printing inorganic material powders.
Further, the solid inorganic thing is selected from zirconium oxide, aluminum oxide, magnesia, titanium dioxide, silica, carbon One or more in SiClx, silicon nitride, gypsum, kaolin, bentonite；
The binding agent is bisphenol A type epoxy resin or bisphenol f type epoxy resin；
The curing agent is polyamide；
The diluent is the one or more in absolute ethyl alcohol, ethylene glycol, acetone.
Further, the particle diameter of the solid inorganic thing is 20~300 μm.
Further, the vacuum drying vacuum is 100~200Pa, will be true with 1~5 DEG C/min heating rate Empty drying box is gradually heating to 60~80 DEG C, is incubated 3~8h.
Compared with prior art, the device have the advantages that being：
The inventive method is simple, easy to operate, can quickly carry out 3D printing inorganic material powders selective laser sintering The simulation test of energy, test sample amount is few, and cost is low.
The present invention is using general commercial laser engraving machine as test equipment, using its high power laser to 3D printing with inorganic Thing powder carries out Fast Sintering, and single laser sintering test only needs a small amount of (tens of grams) sample to complete its 3D printing performance Dependence test, whole test process only need several minutes of times.In addition, the price of the equipment is low, small volume, easy to operate, test into This is extremely low, and the efficiency of scientific experiment can be greatly improved, and promotes the quick research and development of 3D printing inorganic material powders.
Brief description of the drawings
Accompanying drawing 1 is process chart of the invention.
Embodiment
The invention will be further described with embodiment for explanation below in conjunction with the accompanying drawings, and mode of the invention includes but not only limited In following examples.
A kind of analog detection method of the laser sintered performance of 3D printing inorganic material powders, with general commercial laser engraving machine As laser sintered equipment, to the 3D printing inorganic matter powder being laid on the laser engraving machine internal work platform glass plate Periodically continued scanning is made at end, to realize the sintering of the inorganic material powders, observes the curing molding of the inorganic powder after sintering Situation, determine the precinct laser sintering performance of the inorganic material powders.
The analog detection method specifically includes following steps：
Step 1：The computer-controlled program of the laser engraving machine is set, sets the laser head of laser engraving machine in 2D water Scanning range and sweep speed in plane；
Step 2：The inorganic material powders for intending test are laid in the glass plate of the internal work platform of the laser engraving machine On；
Step 3：Start the laser head, laser head makees periodically continued scanning in the scanning range of setting, until institute State the inorganic powder in scanning range and be fully completed sintering；
Step 4：The curing molding situation of inorganic material powders after observation sintering, if curing molding works well, blank Intensity is high, compactness is good, shows the laser sintered functional of the 3D printing inorganic powder.
Wherein, the laser head is CO2Laser, laser power scope are 20~40W.
The scanning range is 50mm × 50mm.
The sweep speed is 200~1000mm/s.
The preparation of the 3D printing inorganic material powders comprises the following steps：
A：Weigh the raw material of the 3D printing inorganic material powders and be well mixed, obtain mixture；The raw material include with The component of lower parts by weight：Solid inorganic thing 20-60 parts, binding agent 10-30 parts, curing agent 2-8 parts, diluent 30-80 parts；
B：The mixture is placed in vacuum drying chamber and is dried in vacuo, completion is dried and dry fill is obtained after natural cooling Divide, finely dispersed 3D printing inorganic material powders.
The solid inorganic thing is selected from zirconium oxide, aluminum oxide, magnesia, titanium dioxide, silica, carborundum, nitridation One or more in silicon, gypsum, kaolin, bentonite；
The binding agent is bisphenol A type epoxy resin or bisphenol f type epoxy resin；
The curing agent is polyamide；
The diluent is the one or more in absolute ethyl alcohol, ethylene glycol, acetone.
The particle diameter of the solid inorganic thing is 20~300 μm.
The vacuum drying vacuum is 100~200Pa, with 1~5 DEG C/min heating rate by vacuum drying chamber by 60~80 DEG C are gradually warming up to, is incubated 3~8h.
Embodiment 1
15 grams of bisphenol A type epoxy resin is weighed, 3 grams of polyamide, 50 grams of absolute ethyl alcohol, is mixed evenly, obtains Binding agent dilution；The kaolin that 35 gram particle footpaths are 100 microns is weighed again to be added into binding agent dilution, after stirring To compound.Compound is placed in vacuum drying chamber again, it is 120Pa to keep vacuum in case, then the heating speed with 2 DEG C/min Drying box is warming up to 65 DEG C by rate, is cooled down after insulation 4h and is obtained drying abundant, dispersed 3D printing inorganic powder.
Using general commercial laser engraving machine as laser sintered equipment, such as the nonmetallic engraving machine of JQ9060 types or JQ50W Type metal incision machine, laser head used are CO2Laser, laser power are arranged to 25W, and laser scanning speed is set as 300mm/ S, scanning range are set to 50mm × 50mm.
3D printing is laid in the glass of laser engraving machine internal work platform with inorganic powder manually using adjustable scraper In glass plate, start laser, laser head continuously scans in selection area periodically, and after 5 minutes, powder is whole in selected areas Complete sintering.
Thin resin layer in 3D printing inorganic powder heats through laser occurs melting and solidification, inorganic powder is formed one The individual small blank of square thin layer.Through examining, the intensity height of the blank, compactness is good, molding effect is good, shows that the inorganic powder is applicable In laser sintered 3D printing, Success in Experiment.
Embodiment 2
15 grams of bisphenol f type epoxy resin is weighed, 5 grams of polyamide, 38 grams of absolute ethyl alcohol, is mixed evenly, obtains Binding agent dilution；The kaolin that 30 gram particle footpaths are 150 microns is weighed again to be added into binding agent dilution, after stirring To compound.Compound is placed in vacuum drying chamber again, it is 120Pa to keep vacuum in case, then the heating speed with 3 DEG C/min Drying box is warming up to 70 DEG C by rate, is cooled down after insulation 5h and is obtained drying abundant, dispersed kaolin powder.
Using general commercial laser engraving machine as laser sintered equipment, such as the nonmetallic engraving machine of JQ9060 types or JQ50W Type metal incision machine, laser head used are CO2Laser, laser power are arranged to 30W, and laser scanning speed is set as 500mm/ S, scanning range are set to 50mm × 50mm.
Kaolin powder is laid on the glass plate of laser engraving machine internal work platform manually using adjustable scraper, Start laser, laser head continuously scans in selection area periodically, and after 3 minutes, powder is fully completed burning in selected areas Knot.
Thin resin layer in 3D printing inorganic powder heats through laser occurs melting and solidification, makes 3D printing inorganic powder End forms a square small blank of thin layer.Through examining, the intensity height of the blank, compactness is good, molding effect is good, shows that this is inorganic Powder is applied to laser sintered 3D printing, Success in Experiment.
Above-described embodiment is only one of the preferred embodiment of the present invention, should not be taken to limit the protection model of the present invention Enclose, as long as the present invention body design thought and that mentally makes have no the change of essential meaning or polishing, it is solved Technical problem it is still consistent with the present invention, should be included in protection scope of the present invention within.

Claims (9)

1. a kind of analog detection method of the laser sintered performance of 3D printing inorganic material powders, it is characterised in that with general commercial Laser engraving machine is as laser sintered equipment, the 3D printing to being laid on the laser engraving machine internal work platform glass plate Make periodically continued scanning with inorganic material powders, to realize the sintering of the inorganic material powders, then observe the inorganic powder after sintering The curing molding situation at end, determine the 3D printing performance of the 3D printing inorganic material powders.
2. a kind of analog detection method of laser sintered performance of 3D printing inorganic material powders according to claim 1, its It is characterised by, specifically includes following steps：
Step 1：The computer-controlled program of the laser engraving machine is set, sets the laser head of laser engraving machine in 2D horizontal planes On scanning range and sweep speed；
Step 2：The 3D printing for intending test is laid in the glass of the internal work platform of the laser engraving machine with inorganic material powders In glass plate；
Step 3：Start the laser head, laser head makees periodically continued scanning in the scanning range of setting, until described sweep 3D printing in the range of retouching is fully completed sintering with inorganic powder；
Step 4：The curing molding situation of inorganic material powders after observation sintering, if curing molding works well, blank intensity Height, compactness are good, show that the laser sintered 3D printing of the 3D printing inorganic powder is functional.
3. a kind of analog detection method of laser sintered performance of 3D printing inorganic material powders according to claim 2, its It is characterised by, the laser head is CO2Laser, laser power scope are 20~40W.
4. a kind of analog detection method of laser sintered performance of 3D printing inorganic material powders according to claim 3, its It is characterised by, the scanning range is 50mm × 50mm.
5. a kind of analog detection method of laser sintered performance of 3D printing inorganic material powders according to claim 4, its It is characterised by, the sweep speed is 200~1000mm/s.
6. a kind of analog detection method of laser sintered performance of 3D printing inorganic material powders according to claim 5, its It is characterised by, the preparation of the 3D printing inorganic material powders comprises the following steps：
A：Weigh the raw material of the 3D printing inorganic material powders and be well mixed, obtain mixture；The raw material includes following heavy Measure the component of part：Solid inorganic thing 20-60 parts, binding agent 10-30 parts, curing agent 2-8 parts, diluent 30-80 parts；
B：The mixture is placed in vacuum drying chamber and is dried in vacuo, dry completion obtained after natural cooling dry fully, Finely dispersed 3D printing inorganic material powders.
7. a kind of analog detection method of laser sintered performance of 3D printing inorganic material powders according to claim 6, its It is characterised by, the solid inorganic thing is selected from zirconium oxide, aluminum oxide, magnesia, titanium dioxide, silica, carborundum, nitridation One or more in silicon, gypsum, kaolin, bentonite；
The binding agent is bisphenol A type epoxy resin or bisphenol f type epoxy resin；
The curing agent is polyamide；
The diluent is the one or more in absolute ethyl alcohol, ethylene glycol, acetone.
8. a kind of analog detection method of laser sintered performance of 3D printing inorganic material powders according to claim 7, its It is characterised by, the particle diameter of the solid inorganic thing is 20~300 μm.
9. a kind of analog detection method of laser sintered performance of 3D printing inorganic material powders according to claim 8, its It is characterised by, the vacuum drying vacuum is 100~200Pa, with 1~5 DEG C/min heating rate by vacuum drying chamber 60~80 DEG C are gradually heating to, is incubated 3~8h.
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CN112225530A (en) * 2020-10-10 2021-01-15 上海交通大学 Technical method for improving compactness of lunar soil 3D printing energy storage block
CN114409388A (en) * 2022-01-27 2022-04-29 兰州文理学院 Material for 3D printing of brick carving in summer and manufacturing method thereof

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