Cov thermoplastics tuaj yeem muab faib ua amorphous thiab semi-crystalline thermoplastics. Amorphous thermoplastics yog pob tshab vim tias lawv tsis muaj cov tshuaj ntxiv pom. Semi-crystalline thermoplastics, ntawm qhov tod tes, tshwm opaque lossis milky rau ntawm qhov muag liab qab. Nyob rau hauv txoj cai, zoo tib yam thermoplastics yuav welded ua ke nrog lub laser. Txawm li cas los xij, cov khoom siv kho qhov muag ntawm cov thermoplastics yuav tsum raug coj mus rau hauv tus account. Cov lus teev cov khoom sib txuas uas tuaj yeem ua laser welded. Ntxiv nrog rau cov kev sib xyaw ua ke no, qhov ntau kuj tuaj yeem nthuav dav los ntawm kev hloov kho cov khoom sib tov.
Cov khoom siv kho qhov muag Cov khoom siv kho qhov muag ntawm cov yas cuam tshuam cov txiaj ntsig ntawm laser vuam.
Ntawm qhov tod tes, laser vuam xav tau pob tshab vuam cov koom tes. Tsis muaj additives, txhua lub thermoplastic yog pob tshab rau laser hluav taws xob. Txawm li cas los xij, qhov sib txawv yog tsim los ntawm amorphous thiab semi-crystalline thermoplastics. Nrog amorphous thermoplastics, cov hluav taws xob kis tau yuav luag zoo tag nrho, txawm tias muaj cov ntaub ntawv tuab. Nrog semi-crystalline thermoplastics, ntawm qhov tod tes, cov hluav taws xob yog refracted thiab xav txog ntawm cov nplej. Qhov no ua rau muaj kev tawg ntawm cov hluav taws xob, uas feem ntau nyob ntawm qhov degree ntawm graining thiab thickness ntawm cov khoom yuav tsum tau irradiated. Daim duab hauv qab no qhia txog kev tsom xam spectral ntawm pob tshab polypropylene (PP). Nyob rau hauv lub wavelength range ntawm 800-1100 nm, lub pob tshab ntawm cov yas yog txawm siab tshaj nyob rau hauv qhov pom ntau yam (400 - 700 nm).
Optical penetration qhov tob Qhov tob qhov tob yog qhov ntsuas ntawm cov khoom ntawm kev sib txuas absorbing.
Nws qhia tau hais tias qhov tob npaum li cas ntawm cov hluav taws xob nkag mus rau hauv cov yas yas ua ntej cov cua sov tsim tawm. Qhov zoo tshaj plaws, qhov tob tob tob tob yog nyob rau hauv µm, saib daim duab saum toj no. Yog tias qhov nqus dej tsis txaus, qhov nqus tau ntau dua yuav tshwm sim. Qhov no heats tag nrho cov thickness ntawm cov khoom, saib cov ntaub ntawv nruab nrab. Cov ntaub ntawv thib peb piav qhia txog ntau qhov kev xav ntawm qhov chaw. Hauv qhov no, cov hluav taws xob tsis tuaj yeem nkag mus rau saum npoo txhua. Ob qhov kawg yog li ntawd tsis zoo rau cov txheej txheem.
Cov cua sov tsim thaum lub sij hawm welding tsim ib cheeb tsam uas muaj kev kub ntxhov, uas tuaj yeem pom los ntawm microtomes lossis microsections nyob rau hauv lub tshuab ntsuas. Kev tsim ntawm lub vuam tuaj yeem ua haujlwm yooj yim heev. Hauv cov ntsiab lus yooj yim, cov khoom yuav tsum muaj nyob rau hauv kev sib cuag ntawm lub cev hauv thaj chaw weld. Tab sis nws tsis yog qhov yooj yim: Cov khoom yuav tsum tau tsim los siv laser.
