Kev txhaj tshuaj molding, uas yog, txhaj tshuaj txhaj rau thermoplastic, txoj kev no yog kom yaj cov khoom yas thiab tom qab ntawd txhaj nws rau hauv cov zaj duab xis kab. Thaum cov yas molten nkag mus rau hauv cov pwm, nws txias rau ib hom duab raws li kab noj hniav. Cov txiaj ntsig cov duab feem ntau yog qhov kawg ntawm cov khoom muag, thiab tsis tas yuav tsum ua dua ntxiv ua ntej kev teeb tsa lossis siv los ua cov khoom kawg. Ntau cov ntsiab lus, xws li tiv thaiv, tav thiab xov, tuaj yeem tsim nyob rau hauv ib kauj ruam kev txhaj tshuaj molding. Kev txhaj tshuaj molding tshuab muaj ob qho tseem ceeb: ib qho khoom siv txhaj tshuaj thiab cov pwm clamping rau kev ua kom yaj thiab pub khoom yas rau hauv cov pwm.
Lub luag haujlwm ntawm cov khoom siv pwm yog: 1. Ua kom pwm kaw raws lub siab txhaj tshuaj; 2. Nqa cov khoom tawm ntawm cov cuab yeej txhaj tshuaj kom yaj lub hnab yas ua ntej nws txhaj rau hauv pwm, thiab tom qab ntawd tswj lub siab thiab nrawm rau txhaj cov yaj rau hauv pwm. Muaj ob qhov tsim ntawm kev txhaj tshuaj siv tam sim no siv: ntsia hlau-hom preplasticizers lossis ob-theem twj, thiab reciprocating screws. Cov ntsia hlau ua ntej siv cov ntsia hlau ua ntej tshaj plaws (thawj theem) los txhaj tshuaj molten rau hauv cov khoom siv txhaj (theem ob). Qhov zoo ntawm cov ntsia hlau preplasticizer yog melt tas li zoo, lub siab thiab lub nrawm nrawm, thiab kev txhaj tshuaj ntim meej (siv cov neeg siv tshuab thawb ntawm ob qho kawg ntawm qhov piston stroke). Cov kev zoo no yuav tsum muaj rau pob tshab, nyias-walled khoom thiab tus nqi siab ntau lawm. Qhov kev tsis txaus ntseeg suav nrog lub sijhawm tsis nyob hauv tsev (ua rau cov khoom tsis zoo), cov khoom siv siab dua thiab cov nqi txij nkawm. Feem ntau siv cov ntsia hlau reciprocating ntsia hlau txhaj tsis tas yuav tus nqus kom yaj thiab txhaj cov yas.
Tshuab moulding: Kuj tseem hu ua hollow tshuab moulding, txoj kev txhim kho yas txav ceev txoj kev lag luam. Lub tshuab tubular yas tawm los ntawm kev txhaws lossis kev txhaj tshuaj ntawm cov roj thermoplastic tso rau hauv cov pwm sib cais thaum nws kub (lossis ua kom sov rau hauv lub xeev muag muag). Tom qab lub pwm tag lawm, cov pa muaj peev xwm dhau mus rau hauv lub parison los tshuab cov yas parison Swell thiab lo rau sab hauv phab ntsa puab, tom qab txias thiab ntom tawm, koj tuaj yeem tau txais ntau yam khoom siv hollow. Cov txheej txheem tsim kev lag luam ntawm cov tshuab zaj duab xis yog zoo li tshuab moulding ntawm cov khoom siv khoob hauv qhov hauv paus ntsiab lus, tab sis nws tsis siv pwm. Los ntawm cov kev pom ntawm kev faib tawm cov txheej txheem yas ua cov thev naus laus zis, cov txheej txheem tsim cov tshuab cov tshuab zaj duab xis feem ntau muaj nyob rau hauv kev rho tawm. Cov txheej txheem tshuab moulding tau siv los ua cov ntim qis qis polyethylene vials thaum lub sijhawm Tsov Rog Thoob Ntiaj Teb thib Ob. Hauv lub sijhawm xyoo 1950, nrog lub hnub yug ntawm high-ntom polyethylene thiab kev txhim kho ntawm tshuab moulding tshuab, tshuab moulding tshuab tau siv dav. Qhov ntim ntawm hollow ntim tuaj yeem ncav ntau txhiab litres, thiab qee qhov kev tsim khoom tau tswj hwm los ntawm lub koos pij tawj. Cov yas haum rau lub tshuab moulding suav nrog polyethylene, polyvinyl chloride, polypropylene, polyester, thiab lwm yam Cov hollow ntim tau dav siv los ua kev lag luam ntim khoom.
Peb lub tuam txhab tsuas yog tsim cov yas txhaj tshuaj pwm, thiab tsim cov yas thaiv, kuj muab cov khoom lag luam raws li cov yas ntim rau.
Yog koj muaj tej lub neej zoo li ntawd
