Tshuab moulding tau tsim rau hauv ob peb txheej txheem tseem ceeb nyob ntawm cov khoom tsim thiab cov kev siv.
Kev txhaj tshuaj molding yog thawj zaug tsim lub hauv qab preform los ntawm cov yas siv txhaj tshuaj molding, tom qab ntawd hloov lub preform mus rau lub tshuab pwm los tshuab- tsim cov khoom hollow. Raws li qib ntawm automation, cov txheej txheem tuaj yeem muab faib ua ib qho - kauj ruam thiab ob - cov txheej txheem. Ib - cov txheej txheem (xws li peb- chaw nres tsheb lossis ob- chaw nres tsheb txhaj tshuaj tshuab moulding tshuab) ua tiav ob qho tib si txhaj tshuaj preform thiab tshuab molding ntawm tib cov khoom, muab cov qib siab ntawm automation thiab zoo heev lub raj mis lub caj dab flatness thiab sealing, haum rau siab - ntim, siab - khoom zoo (xws li kev ntim khoom). Ob-kab ruam txoj hauv kev cais cov kev txhaj tshuaj preform thiab rhuab tshuab molding rau hauv ob lub tshuab sib cais, ua rau cov cuab yeej siv qis dua, tab sis cov kev sib tw muaj nyob rau hauv cov khoom sib xws thiab kev tswj kev huv.
Extrusion tshuab moulding yuav tsum ua ntej tsim lub hauv qab preform los ntawm yas siv extrusion, tom qab ntawd hloov lub preform mus rau lub tshuab pwm los tshuab- tsim cov khoom hollow. Qhov txawv ntawm extrusion thiab txhaj tshuaj molding yog nyob rau hauv txoj kev ntawm preform manufacturing; lub tshuab molding txheej txheem yog qhov tseem ceeb tib yam. Cov txheej txheem no yuav tsum muaj cov cuab yeej siv yooj yim thiab kev nqis peev tsawg, ua rau nws yog ib txoj hauv kev tsim cov thawv hollow, tshwj xeeb tshaj yog tsim rau cov khoom siv xws li polyethylene (PE) thiab polyvinyl chloride (PVC).
Stretch tshuab moulding yog ib hom biaxially oriented stretching tshuab molding. Txoj kev koom nrog thawj zaug ncab lub preform longitudinally, ces inflating nws nrog compressed cua kom ua tiav transverse stretching. Stretch tshuab moulding tuaj yeem txhim kho qhov pom tseeb, cuam tshuam lub zog, qhov tawv tawv, thiab nruj ntawm cov khoom, thiab yog tsim rau tshuab moulding polypropylene thiab polyethylene terephthalate (PET). Nyob ntawm qhov chaw ntawm preform, nws tuaj yeem muab faib ua kev txhaj tshuaj preform oriented stretch tshuab molding, extrusion preform oriented stretch tshuab molding, thiab multilayer oriented stretch tshuab molding.
Tshuab moulding zaj duab xis yog ib txoj hauv kev los ua cov thermoplastic films. Yas yog thawj zaug extruded rau hauv lub raj siv txoj kev extrusion, thiab tom qab ntawd txuas ntxiv mus rau hauv cov yeeb yaj kiab tubular ntawm qee qhov loj los ntawm tshuab cua rau hauv lub raj. Tom qab txias, nws yog folded thiab dov rau hauv ib ob - txheej ca zaj duab xis. Txoj kev no, nrog tshuab moulding yog siv dav tshaj plaws, yog tsim rau kev tsim cov yeeb yaj kiab ntawm polyethylene, polyvinyl chloride, thiab polyamide.
Multi- txheej tshuab moulding yog hais txog kev co-extrusion ntawm ntau txheej txheej ntawm cov ntaub ntawv nrog cov khoom sib txawv (xws li ethylene-vinyl cawv copolymer EVOH, uas muaj cov khoom siv roj ntau, extruded ib txhij). Cov thawv ntim khoom tsim los siv cov txheej txheem no muaj cov khoom thaiv zoo heev thiab tsim nyog rau cov khoom ntim khoom nkag siab rau cov pa oxygen thiab noo noo, xws li cov roj siv tau, cov khoom noj, thiab cov roj tsheb hauv tsheb.
Peb-sib nqus tshuab moulding yog txheej txheem uas tuaj yeem tsim peb-dav duab. Cov cuab yeej no zam cov khoom sagging thiab burrs tshwm sim los ntawm nws tus kheej qhov hnyav, thiab tuaj yeem tsim cov khoom lag luam nrog cov ntu nkhaus lossis cov duab serpentine nrog cov khoom zoo, xws li lub tshuab cua txias hoses thiab irregularly zoo li piping.
