Puas yog tag nrho cov yas tuaj yeem txhaj tshuaj molded?

1, Kev cuam tshuam ntawm cov khoom ntawm cov ntaub ntawv yas ntawm kev txhaj tshuaj molding
Ua ntej, nws yuav tsum tau qhia meej tias cov khoom ntawm cov ntaub ntawv yas yog ib qho tseem ceeb ntawm kev txiav txim siab lawv qhov tsim nyog rau kev txhaj tshuaj molding. Cov khoom ntawm cov ntaub ntawv yas muaj xws li tab sis tsis txwv rau melting point, flowability, thermal stability, shrinkage rate, mechanical zog, thiab lwm yam.
Melting point thiab flowability: Cov txheej txheem txhaj tshuaj molding yuav tsum tau cov ntaub ntawv yas kom yaj sai sai thiab muaj cov dej ntws zoo tom qab cua sov, txhawm rau txhawm rau txhawm rau txhawm rau pwm kab noj hniav. Yog li ntawd, cov ntaub ntawv yas nrog cov ntsiab lus me ntsis melting thiab fluidity zoo yog qhov tsim nyog rau kev txhaj tshuaj molding. Piv txwv li, cov ntaub ntawv thermoplastic xws li polyethylene (PE), polypropylene (PP), thiab polystyrene (PS) tau dhau los siv rau hauv kev txhaj tshuaj molding vim lawv zoo heev melting thiab ntws zog.
Thermal stability: Cov ntaub ntawv yas yuav tsum tau ua kom kub kub melting thiab txias ceev thaum lub sij hawm txhaj tshuaj molding txheej txheem, yog li nws yuav tsum tau hais tias cov khoom muaj thermal stability kom tsis txhob decomposition los yog deterioration ntawm kub kub. Qee cov ntaub ntawv yas uas tsis zoo thermal stability, xws li tej yam thermosetting plastics, yuav ntsib teeb meem hauv kev txhaj tshuaj molding.
Shrinkage tus nqi: Tom qab txhaj tshuaj molding, cov ntaub ntawv yas yuav raug ntim ntim thaum lub caij txias. Lub shrinkage tus nqi ntawm cov khoom yas sib txawv sib txawv, uas muaj kev cuam tshuam loj rau qhov raug thiab cov duab ruaj khov ntawm kev txhaj tshuaj molded qhov chaw. Yog li ntawd, thaum xaiv cov ntaub ntawv txhaj tshuaj molding, nws yog ib qho tsim nyog yuav tsum xav txog tag nrho lawv cov yam ntxwv shrinkage.
Mechanical zog: Lub zog txhua yam ntawm kev txhaj tshuaj molded qhov chaw kuj yog ib qho tseem ceeb rau kev ntsuas lawv qhov zoo. Qee cov ntaub ntawv yas uas muaj zog thiab tawv, xws li nylon (PA), polycarbonate (PC), thiab lwm yam, ua tau zoo hauv kev txhaj tshuaj molding thiab tuaj yeem tsim cov pwm txhaj tshuaj uas ua tau raws li ntau yam kev xav tau.
2, Yuav tsum tau txhaj tshuaj molding txheej txheem
Ntxiv nrog rau cov khoom ntawm cov ntaub ntawv yas, cov txheej txheem txhaj tshuaj molding nws tus kheej kuj tseem tso cai rau kev siv cov ntaub ntawv yas. Cov txheej txheem kev txhaj tshuaj molding muaj ntau theem, nrog rau cov yas yaj, txhaj tshuaj, tuav, txias, demolding, thiab lwm yam. Txhua theem yuav tsum muaj kev tswj xyuas meej xws li kub, siab, thiab lub sijhawm kom zoo thiab ruaj khov ntawm kev txhaj tshuaj molded qhov chaw.
Kev tswj qhov kub thiab txias: Kev tswj xyuas qhov kub thiab txias ntawm cov yas thiab pwm kub yog yuav tsum tau thaum lub sij hawm txhaj tshuaj molding txheej txheem. Qhov kub ntau dhau yuav ua rau cov yas decompose lossis hlawv, thaum qhov kub thiab txias yuav cuam tshuam rau cov dej ntws thiab ntim cov nyhuv ntawm cov yas.
Kev tswj qhov siab: Txhaj siab thiab tuav lub siab yog qhov tseem ceeb ntawm cov txheej txheem txhaj tshuaj molding. Kev tsim nyog siab tuaj yeem ua kom ntseeg tau tias cov yas puv puv pwm kab noj hniav thiab txo qhov tshwm sim ntawm qhov tsis xws luag xws li shrinkage thiab npuas. Txawm li cas los xij, kev kub siab ntau kuj tseem tuaj yeem ua rau pwm puas lossis deformation ntawm kev txhaj tshuaj molded qhov chaw.
Lub sij hawm tswj: Lub sij hawm txhaj tshuaj, tuav lub sij hawm, thiab lub sij hawm txias thaum lub sij hawm txhaj tshuaj molding txheej txheem kuj yuav tsum tau precisely tswj. Lub sij hawm luv luv yuav ua rau kev kho tsis tiav lossis kev ntxhov siab sab hauv ntawm kev txhaj tshuaj molded qhov chaw; Yog tias lub sijhawm ntev dhau lawm, nws yuav txo qis kev tsim khoom thiab ua kom muaj zog siv zog.
3, Cov kev txwv hauv kev siv tswv yim
Txawm hais tias kev txhaj tshuaj molding thev naus laus zis muaj cov ntawv thov dav dav hauv kev ua cov yas, tsis yog txhua yam khoom siv yas tsim nyog rau kev ua los ntawm kev txhaj tshuaj molding tshuab. Nov yog qee qhov kev txwv hauv kev siv tswv yim:
Thermosetting plastics: Thermosetting plastics solidify thiab tsis tuaj yeem yaj lossis molded dua tom qab cua sov. Yog li, hom khoom siv yas no tsis haum rau kev ua haujlwm siv tshuab txhaj tshuaj molding.
High viscosity plastics: Qee cov viscosity siab plastics muaj cov dej tsis zoo hauv lub xeev molten thiab nyuaj rau txhaj rau hauv pwm kab noj hniav los ntawm kev txhaj tshuaj molding tshuab. Cov ntaub ntawv yas no feem ntau xav tau molding los ntawm lwm txoj kev ua.
Cov kev ua haujlwm tshwj xeeb: Qee qhov kev txhaj tshuaj molded yuav tsum tau ua kom tau raws li cov kev xav tau tshwj xeeb, xws li siab pob tshab, nplaim hluav taws kub retardancy, siab hnav tsis kam, thiab lwm yam. Cov kev ua haujlwm tshwj xeeb no yuav txwv tsis pub ntau yam khoom yas muaj thiab ua rau muaj kev nyuaj siab thiab nqi txhaj tshuaj. molding.