Rotational molding txheej txheem kuj tseem hu ua rotary molding, rotary casting molding.Nws yog ib txoj kev hollow molding ntawm thermoplastic.
Rotational molding yog txheej txheem ntau lub hom phiaj rau kev tsim ntau yam hollow yas qhov chaw.Rotational molding txheej txheem siv cua sov thiab kev sib hloov raws ob axes los tsim hollow ib feem.Cov yas molten yog txhaj rau hauv cov pwm rotating, thiab cov centrifugal quab yuam yuam cov yas molten los lo rau sab hauv phab ntsa ntawm pwm.
Uas yog hais tias, cov hmoov los yog cov khoom muab tshuaj yog txhaj rau hauv pwm ua ntej, thiab cov khoom yog sib npaug nrog cov pwm kab noj hniav thiab yaj los ntawm nws tus kheej lub ntiajteb txawj nqus thiab centrifugal quab yuam los ntawm cua sov cov pwm thiab dov thiab rotating nyob rau hauv ntsug thiab kab rov tav cov lus qhia. , thiab tom qab ntawd demoulded kom tau cov khoom hollow tom qab txias.Vim tias qhov kev sib hloov ceev ntawm kev sib hloov molding tsis siab, cov cuab yeej siv tau yooj yim, cov khoom yuav luag tsis muaj kev ntxhov siab sab hauv, thiab tsis yooj yim rau deform thiab sag.Thaum pib, nws yog siv rau PVC muab tshuaj txhuam cov khoom ua si, roj hmab pob, lub raj mis thiab lwm yam khoom me me.Tsis ntev los no, nws kuj tau siv dav hauv cov khoom loj.Cov resins siv xws li polyamide, polyethylene, hloov polystyrene polycarbonate, thiab lwm yam.
Nws zoo ib yam li rotary casting, tab sis cov khoom siv tsis yog kua, tab sis sintered qhuav hmoov.Cov txheej txheem yog muab cov hmoov tso rau hauv pwm thiab ua kom nws tig ib ncig ntawm ob qho tib si perpendicular axes.Cov khoom hollow tuaj yeem tau los ntawm pwm los ntawm cua sov thiab sib xyaw ua ke ntawm cov pwm sab hauv, thiab tom qab ntawd txias.
Kuj tseem hu ua rotary molding lossis rotary molding.Cov hmoov yas (xws li LLDPE) ntxiv rau cov pwm kaw.Cov pwm yog rhuab thaum tig.Cov yas melts thiab adheres rau saum npoo ntawm pwm kab noj hniav sib npaug.Tom qab pwm txias lawm, hollow yas cov khoom uas zoo ib yam li pwm kab noj hniav yuav tau, xws li tej nkoj nquam, thawv, chim, phiab, kaus poom, thiab lwm yam. Nws feem ntau yog pub, pwm sealing, cua sov, txias, demoulding, pwm tu thiab lwm cov kauj ruam yooj yim.Txoj kev no muaj qhov zoo ntawm me me shrinkage, yooj yim tswj ntawm phab ntsa tuab thiab tus nqi qis ntawm pwm, tab sis tsis tshua muaj kev ua haujlwm.
Cov yam ntxwv tseem ceeb ntawm rotational molding txheej txheem yog raws li nram no:
1.Tus nqi ntawm cov pwm rotational yog tsawg - rau cov khoom ntawm tib qhov loj, tus nqi ntawm cov pwm rotational yog li ntawm 1/3 mus rau 1/4 ntawm cov tshuab moulding thiab txhaj tshuaj molding, uas yog tsim rau molding loj cov khoom yas.
2.Rotational molding khoom ntug lub zog yog qhov zoo - rotational molding tuaj yeem ua tiav cov khoom ntug tuab ntawm ntau tshaj 5 hli, daws qhov teeb meem ntawm hollow khoom ntug nyias.
3.Rotational molding tuaj yeem tso ntau yam inlays.
4.Cov duab ntawm cov khoom siv molding tuaj yeem ua tau ntau yam, thiab cov tuab tuaj yeem ua tau ntau tshaj 5 hli.
5.Rotational molding tuaj yeem tsim cov khoom kaw tag nrho.
6.Rotational molding cov khoom tuaj yeem sau nrog cov ntaub ntawv foaming kom ua tiav thermal rwb thaiv tsev.
7.Cov phab ntsa tuab ntawm cov khoom siv molding tuaj yeem hloov kho dawb (ntau tshaj 2 hli) yam tsis tau kho cov pwm.
Post lub sij hawm: Lub Xya hli ntuj-14-2021