SLS (Selective Laser Sintering) lossis MJF (Multi Jet Fusion)? Dab tsi siv tshuab xaiv, qhov txawv ntawm lawv, thiab cov txiaj ntsig zoo li cas? Peb feem ntau tau txais cov lus nug no los ntawm peb cov neeg siv khoom.
Cov txheej txheem tsis yog paub zoo thiab siv dav li FFF / FDM. Cov laj thawj tseem ceeb yog qhov xav tau ntawm qhov chaw siab dua thiab tus nqi yuav khoom ntawm lub tshuab luam ntawv. Txawm li cas los xij, peb tuaj yeem hais tau tseeb tias hauv kev tsim khoom lag luam, SLS thiab MJF yog cov neeg nyiam thiab paub zoo, thiab lawv cov koob meej tau loj hlob tuaj. Kev lig kev cai lawv tau siv nyob rau hauv ntau lawm thiab automation, tab sis lawv tau nce siv hauv cov khoom me me.
dab tsi lawv muaj sib xws
Hauv ob qhov xwm txheej, nws yog Powder Bed Fusion (PBF). Cov hmoov me me yog yaj / sintered los ntawm cua sov (qhov loj ntawm cov hmoov yog 30-60 μm).
Qhov txawv yog dab tsi?
Qhov sib txawv tseem ceeb ntawm cov thev naus laus zis yog qhov chaw ntawm cov khoom siv hluav taws xob rau sintering hmoov. Qhov no ncaj qha cuam tshuam rau txhua yam khoom ntawm cov ntawv luam tawm.
SLS | MJF | |
Technology | Selective laser sintering yog tsim nyob rau hauv lub thib ob ib nrab ntawm lub xyoo 1980s nyob rau hauv lub teb chaws USA. Tam sim no, feem ntau ntawm cov patents tas sij hawm, qhov no tso cai rau kev loj hlob ntawm cov cuab yeej technology thiab nkag mus rau cov tuam txhab tshiab. Kev luam ntawv zoo yuav txawv ntawm lub tshuab luam ntawv mus rau lub tshuab luam ntawv. Lub ntim tsim yog rhuab mus ze rau lub melting point ntawm cov khoom thiab tom qab ntawd yog siv lub laser rau sinter hmoov nto. | Multijet fusion yog patented thev naus laus zis ntawm lub tuam txhab HP thiab lawv cov neeg ua haujlwm yog cov tshuab luam ntawv 4200 thiab 5200. Ob leeg muaj qhov tsim ntim ntawm 380 x 284 x 380 mm thiab qhov sib txawv tseem ceeb yog kev luam ntawv ceev. Ib yam li siv SLS thev naus laus zis, tag nrho cov tsim ntim tau ua kom sov li ze rau qhov chaw melting ntawm cov khoom. Tom qab ntawd lub taub hau luam tawm dav hlau fusing tus neeg sawv cev hauv ib qho dhau mus rau cov hmoov av hauv cov duab ntawm ob sab. Tom ntej no, lub teeb infrared cua sov thiab fuse cov hmoov. Tom qab ntawd, txheej tom ntej ntawm cov khoom siv hmoov yog tso. |
Khoom siv | Raws li qhov no yog cov cuab yeej qub, muaj ntau yam ntaub ntawv thiab cov chaw tsim khoom sib txawv koj tuaj yeem xaiv los ntawm. Cov ntaub ntawv yog muab los ntawm lub tshuab luam ntawv manufacturers lawv tus kheej los yog muaj cov tuam txhab tshwj xeeb tshwj xeeb rau kev tsim cov ntaub ntawv. Cov khoom siv feem ntau yog PA12, tab sis lwm yam ntaub ntawv xws li PA11, PA6, TPU, PEEK, PP kuj muaj. Ntau yam sib xyaw xws li PA12 nrog iav, aluminium lossis carbon hais. | Txawm hais tias HP yog tib lub chaw tsim khoom ntawm MJF thev naus laus zis, lawv tau qhib rau cov khoom siv los ntawm cov neeg xa khoom sab nraud thiab lawv tsis xav tsim nws los ntawm lawv tus kheej. Lawv muaj kev koom tes nrog cov hom xws li BASF lossis Evonik uas lav qhov zoo. Cov ntaub ntawv tam sim no yog PA12, PA11, PA12 iav hlaws, TPU thiab PP. |
Printing precision | Z-axes -- 0.1 hli | Z-axes -- 0.08 hli |
Luam nrawm / nqe | Kev luam ntawv ceev yog nyob ntawm seb muaj pes tsawg qhov luam tawm. Ib lub laser yuav tsum kos tus nto ntawm txhua tus qauv sib cais. Qhov no yog qhov zoo dua thaum tsuas yog ib feem yog luam tawm. Ntawm qhov ntim loj dua, nws yuav siv sijhawm ntev dua piv rau MJF. Vim qhov no kuj yog tus nqi siab dua. | Kev luam ntawv ceev yog tib yam txawm tias muaj pes tsawg qhov luam tawm. Lub sij hawm xav tau los ua ib txheej yog tas li. Qhov no yog qhov zoo dua thaum ntau cov qauv luam tawm ib zaug thiab tag nrho cov ntim ntim tau ntim. Feem ntau, cov khoom ntim qis yog tus nqi ntau dua ntawm HP tshuab luam ntawv. |
Kev sib piv ntawm cov khoom siv kho tshuab ntawm PA12
PA12 yog cov khoom siv dav tshaj plaws rau SLS thiab MJF. Cov khoom siv kho tshuab kawg ntawm cov ntawv luam tawm zoo sib xws thiab feem ntau, tsis muaj qhov sib txawv. Txawm li cas los xij, nws tuaj yeem hais tias PA12 luam tawm los ntawm MJF muaj qhov ua tau zoo dua me ntsis. Hauv lub rooj, koj tuaj yeem nrhiav cov ntaub ntawv ntawm cov khoom siv kho tshuab uas tau tshaj tawm los ntawm cov chaw tsim khoom. Cov kev ntsuam xyuas tau ua raws li ob txoj kev sib txawv, yog li cov txiaj ntsig tsis sib piv
SLS | MJF | |
Hom | EOS | HP |
Tsim ntim | 650 x 320 x 560 mm | 380 x 284 x 380 mm |
Tensile zog | XY: 48 MPa Z: 48 MPa (ISO 527) | XY: 48 MPa Z: 48 MPa (ASTM D638) |
Tensile modulus | XY: 1650 MPa Z: 1650 MPa (ISO 527) | XY: 1700 MPa Z: 1800 MPa (ASTM D638) |
Flexural modulus | XY: 1500 MPa Z: 1500 MPa (ISO 527) | XY: 1730 MPa Z: 1730 MPa (ASTM D638) |
Elongation ntawm nres | XY: 18% Z: 4% (ISO 527) | XY: 20% MPa Z: 15% MPa (ASTM D638) |
Txhawm rau sib piv cov ntawv luam tawm tau xaiv qhov chaw tshaj plaws, siv cov khoom tshiab. Siv cov khoom zoo thiab tuav nws yog ib qho tseem ceeb heev uas tuaj yeem cuam tshuam cov khoom kawg ntawm cov ntawv luam tawm.