Raws li cov txheej txheem molding sib txawv, cov yas ua pwm tuaj yeem muab faib ua ntau hom sib txawv raws li cov txheej txheem sib txawv. Cov no feem ntau suav nrog kev txhaj tshuaj molding, extrusion molding pwm, nqus cov pwm pwm, thiab siab - ntom polystyrene molding pwm.
Yas Txhaj Moulds: Cov no yog cov feem ntau siv molding pwm nyob rau hauv zus tau tej cov thermoplastic qhov chaw. Cov khoom siv ua haujlwm sib raug rau cov yas txhaj tshuaj pwm yog lub tshuab yas txhaj tshuaj molding. Cov yas yog thawj rhuab thiab yaj nyob rau hauv lub qhov cub cua sov nyob rau hauv qab ntawm lub tshuab txhaj tshuaj. Tom qab ntawd, tsav los ntawm cov ntsia hlau lossis plunger ntawm lub tshuab txhaj tshuaj, nws nkag mus rau hauv pwm kab noj hniav los ntawm kev txhaj tshuaj nozzle thiab pwm qhov rooj kaw lus. Cov yas cools thiab hardens, thiab cov khoom yog ces demolded. Nws cov qauv feem ntau muaj cov molding Cheebtsam, lub rooj vag system, kev taw qhia Cheebtsam, ib tug ejection mechanism, ib tug kub tswj qhov system, ib tug venting system, thiab txhawb cov khoom. Cov khoom siv feem ntau yog cov pwm yas pwm steel, nrog rau cov khoom siv feem ntau suav nrog cov qauv hlau, cov cuab yeej carbon steel, cov cuab yeej hlau alloy, thiab siab - steel ceev. Kev txhaj tshuaj molding feem ntau tsuas yog tsim nyog rau kev tsim cov khoom siv thermoplastic. Cov khoom siv yas uas tsim los ntawm kev txhaj tshuaj molding muaj ntau yam sib txawv, xws li cov khoom siv niaj hnub mus rau cov tshuab ua haujlwm, cov khoom siv hluav taws xob, thiab cov khoom siv thauj mus los. Nws yog txoj kev siv ntau tshaj plaws hauv kev tsim khoom yas.
Yas compression pwm muaj ob hom qauv: compression molding thiab txhaj tshuaj molding. Cov no feem ntau yog siv rau molding thermosetting plastics, thiab cov khoom siv sib xws yog lub tshuab compression molding. Nyob rau hauv compression molding, raws li cov khoom ntawm cov yas, cov pwm yog rhuab mus rau molding kub (feem ntau 103℃-108 degree), ces cov metered compression molding hmoov yog muab tso rau hauv pwm kab noj hniav thiab pub chamber. Cov pwm raug kaw, thiab cov yas softens thiab ntws nyob rau hauv high kub thiab siab, solidifying thiab teeb tsa tom qab ib tug tej lub sij hawm los tsim cov yam khoom uas xav tau. Txhaj tshuaj molding txawv ntawm compression molding nyob rau hauv uas nws muaj ib tug cais chav noj mov. Ua ntej molding, pwm raug kaw, thiab cov yas yog preheated thiab ua viscous nyob rau hauv lub chamber pub. Nyob rau hauv lub siab, nws yog ces extruded rau hauv pwm kab noj hniav thiab hardened los tsim cov khoom kawg. Compression pwm kuj tseem siv los pwm qee yam tshwj xeeb thermoplastics, xws li nyuaj- rau- melting thermoplastics (piv txwv li, polyvinyl fluoride) blanks (txias), siab - kho qhov muag- cov lo ntsiab muag ua tau zoo, thiab me ntsis foamed nitrocellulose automotive. Compression pwm feem ntau muaj cov kab noj hniav, noj kab noj hniav, kev taw qhia mechanism, ejection Cheebtsam, thiab cua sov system. Txhaj pwm yog dav siv nyob rau hauv encapsulation ntawm cov khoom siv hluav taws xob. Cov ntaub ntawv siv hauv kev tsim cov pwm compression yog qhov pib zoo ib yam li cov siv hauv kev txhaj tshuaj pwm.
Yas extrusion pwm yog ib hom pwm siv los tsim thiab tsim cov khoom yas txuas ntxiv -zoo li tus. Kuj tseem hu ua extrusion tuag hau, lawv tau siv dav hauv kev ua cov kav dej, pas nrig, monofilaments, nplooj ntawv, zaj duab xis, xaim thiab cable sheathing, thiab profiles. Cov khoom siv sib xyaw ua ke yog cov yas extruder. Lub hauv paus ntsiab lus yog tias cov khoom yas melts thiab plasticizes nyob rau hauv cua sov thiab siab los ntawm lub rotating ntsia hlau ntawm lub extruder, thiab ces dhau los ntawm ib tug tuag ntawm ib tug tshwj xeeb zoo los tsim ib tug tas mus li yas khoom nrog tib tug ntoo khaub lig-section raws li cov tuag. Cov ntaub ntawv tseem ceeb uas siv rau hauv lawv cov khoom siv xws li carbon structural steel thiab alloy cov cuab yeej. Qee cov pwm extrusion kuj muaj hnav- cov ntaub ntawv tiv taus xws li pob zeb diamond embedded rau hauv qhov chaw uas yuav tsum tau hnav tsis kam. Cov txheej txheem extrusion feem ntau tsuas yog siv rau kev tsim cov khoom siv thermoplastic, thiab lawv cov qauv sib txawv ntawm cov pwm txhaj tshuaj thiab cov pwm compression.
Yas tshuab moulding pwm yog siv los tsim cov thawv yas hollow (xws li lub raj mis dej haus, cov khoom ntim tshuaj txhua hnub, thiab lwm yam ntim khoom). Tshuab moulding txoj kev, raws li lawv cov txheej txheem txheej txheem, feem ntau suav nrog extrusion tshuab moulding, txhaj tshuaj molding, txhaj stretch tshuab moulding (feem ntau hu ua "txhaj ncab tshuab"), multi- txheej tshuab moulding, thiab ntawv tshuab moulding. Cov cuab yeej siv rau tshuab moulding hollow cov khoom feem ntau hu ua yas tshuab moulding tshuab. Tshuab moulding tsuas yog tsim rau kev tsim cov khoom siv thermoplastic. Tshuab moulding pwm muaj cov qauv yooj yim, thiab cov ntaub ntawv siv feem ntau yog carbon fiber.
Lub tshuab nqus tsev tsim pwm yog cov pwm siv los tsim cov khoom yas yooj yim los ntawm cov ntawv yas lossis daim hlau. Lub hauv paus ntsiab lus yog siv lub tshuab nqus tsev los yog compressed cua molding kom deform cov ntawv yas los yog phaj, uas yog tsau rau lub concave los yog convex pwm, thiab tom qab ntawd ua raws li cov pwm kab noj hniav kom tau cov khoom xav tau. Lawv tsuas yog siv rau hauv kev tsim cov ntim khoom siv niaj hnub, khoom noj, thiab cov khoom ua si. Vim tias lub tshuab nqus tsev pwm ua haujlwm ntawm qhov tsis tshua muaj siab, lawv feem ntau yog ua los ntawm cam khwb cia txhuas lossis tsis yog-cov ntaub ntawv hlau, uas ua rau muaj cov qauv yooj yim.
High-expansion polystyrene moulding pwm yog cov pwm siv los ua ntau yam duab ntawm cov ntaub ntawv yas ntim khoom los ntawm cov khoom siv polystyrene nthuav dav (ib lub hlaws-zoo li cov khoom tsim los ntawm polystyrene thiab foaming agent). Lub hauv paus ntsiab lus yog qhov nthuav dav polystyrene tuaj yeem ua rau chav - tsim hauv pwm. Muaj ob hom: yooj yim phau ntawv pwm thiab hydraulic xovxwm- hom ua npuas ncauj yas pwm. Cov no tsuas yog siv los tsim cov khoom ntim khoom lag luam. Cov khoom siv los tsim cov pwm no suav nrog cam khwb cia txhuas, stainless hlau, thiab tooj dag.