Yas txhaj molding txoj kev ua haujlwm

Nws txawv vim cov ntaub ntawv ua. Kev txhaj tshuaj molding ntawm thermoplastics suav nrog cov txheej txheem xws li pub mis, plasticizing, txhaj tshuaj, tuav lub zog, txias, thiab demoulding. Lub molding ntawm thermosetting plastics thiab roj hmab kuj suav nrog cov txheej txheem tib yam, tab sis lub chim kub yog qis dua li ntawm cov thermoplastics, thiab kev txhaj tshuaj siab dua. Cov pwm yog cua sov. Tom qab cov khoom raug txhaj tshuaj, nws yuav tsum tau mus rau kev kho los yog vulcanization txheej txheem hauv pwm, thiab tom qab ntawd tso cov yeeb yaj kiab thaum nws kub.

Txhaj tshuaj molding yog hais txog tus qauv uas muaj qee yam zoo. Lub molten colloid yog txhaj rau hauv kab noj hniav los ntawm lub siab los tsim. Cov txheej txheem txheej txheem yog: yaj cov khoom yas ntawm ib qho chaw melting, thiab txhaj cov pwm ntawm ib qho kev ceev los ntawm lub siab ntawm lub tshuab txhaj tshuaj Sab hauv, cov pwm yog txias los ntawm cov dej ntws los ua kom cov yas kom tau cov khoom zoo ib yam li cov khoom siv. tsim kab noj hniav.

Txhaj tshuaj molding (txhaj tshuaj molding) yog ib txoj hauv kev uas cov khoom siv thermoplastic lossis cov khoom siv thermosetting molding yog uniformly plasticized nyob rau hauv ib lub rhaub, thiab ces thawb mus rau hauv kab noj hniav ntawm ib tug kaw pwm los ntawm ib tug plunger los yog ib tug txav ntsia hlau.

Kev txhaj tshuaj molding yog tsim rau yuav luag txhua cov thermoplastics. Txhaj tshuaj molding kuj tau ua tiav siv los pwm qee yam thermoset plastics. Lub voj voog molding ntawm kev txhaj tshuaj molding yog luv luv (ob peb vib nas this mus rau ob peb feeb), thiab qhov zoo ntawm cov khoom pwm tuaj yeem nyob ntawm ob peb grams mus rau kaum ntawm kilograms. Nws tuaj yeem tsim cov khoom molded nrog cov duab nyuaj, qhov tseeb qhov ntev, thiab cov hlau lossis cov hlau tsis yog hlau ntxig ib zaug. Yog li ntawd, txoj kev muaj zog adaptability thiab siab ntau lawm efficiency.

Cov tshuab txhaj tshuaj molding tau muab faib ua ob pawg: plunger txhaj tshuab thiab ntsia hlau txhaj tshuab. Lawv yog tsim los ntawm peb qhov chaw: kev txhaj tshuaj system, clamping system thiab yas pwm. Cov txheej txheem molding tuaj yeem muab faib ua:

(1) Exhaust txhaj molding. Lub tshuab nqus tsev twj tso kua mis rau lub tshuab nqus tsev twj tso kua mis muaj qhov chaw nres nkoj hauv nruab nrab ntawm lub thoob thiab tseem txuas nrog lub tshuab nqus tsev. Thaum cov yas yog plasticized, lub tshuab nqus tsev twj tso kua mis tuaj yeem evaporate cov dej vapor, monomer thiab volatilization muaj nyob rau hauv cov yas. Cov khoom sib deev thiab huab cua yog rub tawm los ntawm qhov chaw nres nkoj tso pa; cov ntaub ntawv raw tsis tas yuav tsum tau qhuav ua ntej, yog li txhim kho kev tsim khoom thiab cov khoom zoo. Nws yog tshwj xeeb tshaj yog haum rau molding ntawm polycarbonate, nylon, plexiglass, cellulose thiab lwm yam ntaub ntawv uas yooj yim nqus dej noo.

(2) Flow txhaj molding. Flow txhaj tshuaj molding tuaj yeem siv cov tshuab txav ntsia hlau zoo tib yam. Ntawd yog, cov yas yog tsis tu ncua plasticized thiab nyem rau hauv pwm kab noj hniav nrog qee qhov kub. Tom qab cov yas ntim cov kab noj hniav, cov ntsia hlau nres. Lub thrust ntawm cov ntsia hlau yog siv los khaws cov khoom nyob rau hauv pwm nyob rau hauv lub siab rau lub sij hawm tsim nyog, thiab ces txias thiab zoo. Flow txhaj molding kov yeej cov cuab yeej txwv ntawm kev tsim cov khoom loj, thiab qhov zoo ntawm cov khoom tuaj yeem tshaj qhov siab tshaj plaws txhaj tshuaj ntim ntawm lub tshuab txhaj tshuaj. Nws cov yam ntxwv yog tias cov khoom yas tsis yog khaws cia rau hauv lub thoob, tab sis txuas ntxiv mus rau hauv pwm, yog li nws yog ib txoj hauv kev sib xyaw extrusion thiab txhaj tshuaj.

(3) Kev txhaj tshuaj molding. Kev txhaj tshuaj molding yog ib txoj hauv kev uas siv lub tshuab txhaj tshuaj nrog ob lossis ntau qhov kev txhaj tshuaj los txhaj cov tshuaj sib txawv lossis cov xim sib txawv ntawm cov yas rau hauv pwm tib lub sijhawm lossis ua ntu zus. Txoj kev no tuaj yeem tsim cov khoom sib xyaw nrog ntau xim thiab / lossis ntau yam yas. Kev txhaj tshuaj molding yog ob xim thiab ntau xim.

(4) Tsis muaj kev txhaj tshuaj molding. Tsis muaj tus khiav hauv pwm, tab sis qhov txuas ntxiv nozzle ntawm lub tshuab txhaj tshuaj ncaj qha txhaj cov khoom molten rau hauv txhua qhov kab noj hniav. Thaum lub sij hawm kev txhaj tshuaj, cov yas nyob rau hauv cov dej ntws channel tseem molten thiab ntws, thiab tsis tuaj nrog cov khoom thaum lub sij hawm demolding, yog li tsis muaj ntws channel seem ntawm ib feem. Txoj kev molding no tsis tsuas yog txuag cov ntaub ntawv raw, txo cov nqi, tab sis kuj txo cov txheej txheem, uas tuaj yeem ua tiav cov khoom siv tsis siv neeg.

(5) Kev txhaj tshuaj molding. Lub hauv paus ntsiab lus ntawm kev txhaj tshuaj molding yog txhawm rau tso cov tshuaj tiv thaiv cov ntaub ntawv raw rau hauv lub taub hau sib tov tom qab tau ntsuas los ntawm cov cuab yeej ntsuas ntsuas, sib tsoo thiab sib xyaw hauv lub taub hau sib xyaw, thiab tom qab ntawd txhaj rau hauv cov pwm kaw ntawm qhov kub ceev kom kho sai, demolding, thiab tshem tawm cov khoom. Nws yog tsim rau kev ua qee cov thermosetting yas thiab elastomers xws li polyurethane, epoxy resin, unsaturated polyester resin, silicone resin, thiab alkyd resin. Feem ntau yog siv rau kev ua polyurethane.

(6) Txhaj molding ntawm thermosetting yas. Granular los yog agglomerated thermosetting plastics yog plasticized rau hauv lub xeev khov los ntawm qhov kev txiav txim ntawm cov ntsia hlau nyob rau hauv ib tug nruj tswj kub chim. Nyob rau hauv kev txhaj tshuaj siab dua, cov khoom nkag mus rau hauv pwm nyob rau hauv ib tug tej yam kub ntau yam rau cross-linking thiab solidification. Ntxiv nrog rau kev hloov pauv ntawm lub cev lub cev, thermosetting yas txhaj tshuaj molding kuj muaj tshuaj hloov pauv. Yog li, piv nrog thermoplastic txhaj molding, muaj qhov sib txawv loj hauv cov khoom siv molding thiab kev siv tshuab.