Dab tsi yog qhov ua tsis tiav ntawm cov tshuab moulding tshuab?

1, Lub tshuab molding tshuab tsis tso tawm
1. Qhov pib kub yog qhov tsawg, uas tej zaum yuav tshwm sim los ntawm kev puas tsuaj ntawm extrusion chim thiab qhov chaw. Xyuas seb qhov kub ntawm qhov extrusion chim thiab tuag lub taub hau thiab lwm qhov chaw ua tau raws li tus qauv, seb lub sij hawm cua sov puas txaus, thiab seb lub rhaub puas puas lawm, thiab hloov lub sij hawm.
2. Yog tias muaj cov kua nplaum nplaum ntawm qhov chaw pub mis, ua ntej txo qhov kub thiab txias ua ntej nres, thiab tom qab ntawd nres lub tshuab thaum tsis muaj kua nplaum ntawm cov ntsia hlau noj. Thaum lub tshuab nyuam qhuav pib, nws yog ib qho tsim nyog yuav tsum tau siv cov pas nrig yas lossis ntoo pas nrig los nyem rau ntawm qhov chaw pub khoom noj; Cov khoom siv, kom lub colloid lo rau qhov pub ib feem ntawm cov ntsia hlau txav mus rau pem hauv ntej.
3. Qhov teeb meem ntawm txoj siv tsav tsheb yuav yog tias txoj siv tsav tsheb yog qhov qub lossis xoob dhau, ua rau muaj qhov tsis zoo. Hloov thiab kho txoj siv tawv kom tsis txhob muaj kev xoob ntxiv thiab poob tawm cuam tshuam rau kev pub mis.
Yas hollow molding khoom
2, Cov khoom siv dub muaj nyob rau saum npoo ntawm cov khoom siv molded
Muaj ntau qhov laj thawj rau cov pob zeb dub lossis cov kab dub luv luv hauv cov pob tshab ntawm cov khoom siv tshuab.
1. Lub sijhawm khaws cia ntawm cov khoom siv raw hauv lub tshuab tshuab molding los yog cov dej ntws ntws ntev dhau lawm, thiab cov khoom siv hloov pauv.
2. Lub tshuab moulding ntsia hlau thiab lub thoob yog hnav hnyav heev, thiab cov khoom siv raw tsis tuaj yeem ua kom zoo ib yam.
3. Cov dej txias tsis zoo ntawm cov pwm ua rau muaj qhov sib txawv loj ntawm tag nrho qhov kub ntawm cov pwm.
4. Cov pwm tso tawm tsis zoo, thiab cov cua nkag mus rau hauv cov pwm kab noj hniav, ua rau scorching.
3, Nto npuas
Thaum lub sij hawm txheej txheem ntawm tshuab moulding, qhov saum npoo ntawm cov khoom tau tsim thiab cov roj uas tsis tuaj yeem tawm hauv lub sijhawm raug kaw, ua rau muaj qhov tsis xws luag ntawm cov khoom siv tshuab molding.
1. Cov khoom siv molding yog ntub, thiab cov dej vapor evaporates rau hauv cov khoom nto.
2. Cov pa tawm pwm raug thaiv los yog cov pa tawm tsis zoo, thiab cov pa roj tsis tuaj yeem tawm tau zoo.
3. Lub sij hawm tshuab moulding lub sij hawm luv luv, thiab cov roj cav tsis tuaj yeem tawm sai sai.
4. Lub tshuab tsim cua siab parameter teeb tsa yuam kev.
5. Lub tshuab moulding ntsia hlau tig nrawm dhau.
6. Cov ntsia hlau rov qab siab tsawg dhau.
7. Muaj volatile additives nyob rau hauv cov ntaub ntawv raw.
Multi-layer tshuab moulding tshuab khoom
4, Tsawg nto tiav
1. Lub tshuab moulding siab tsis txaus, thiab cov ntaub ntawv raw tsis yog compacted kiag li.
2. Lub thoob kub yog qhov tsawg dhau, thiab cov khoom siv raw tsis yog melted tag, ua rau cov khoom tsis tiav.
3. Qhov kub ntawm cov pwm tsis txaus, thiab cov khoom tsis tuaj yeem nyob ze rau sab hauv ntawm pwm, uas ua rau muaj teeb meem hauv cov txheej txheem ntau lawm.
4. Cov khoom siv raw yog ntub, thiab cov dej ntws tsis zoo thaum nws nkag mus rau hauv cov txheej txheem ntawm lub tshuab moulding tshuab, uas tseem yuav ua rau txo qis ntawm qhov chaw tiav.
5, Tsis sib npaug longitudinal phab ntsa thickness ntawm cov khoom
1. Qhov hnyav poob ntawm cov pwm yog qhov hnyav. Qhov teeb meem no tuaj yeem txhim kho los ntawm kev txo qhov kub ntawm cov pwm, ua kom cov pwm tuaj yeem ua kom nrawm dua, hloov cov resin nrog tsawg yaj khiav ceev, thiab kho cov cuab yeej tswj ntawm pwm.
2. Qhov sib txawv ntawm txoj kab uas hla ntawm ob lub longitudinal cross sections ntawm cov khoom siv tshuab yog loj dhau, uas cuam tshuam rau kev tsim khoom. Txhawm rau daws qhov teeb meem no, peb tuaj yeem hloov kho cov khoom tsim thiab txais yuav cov txheej txheem hauv qab tshuab molding.
Tshuab tshuab moulded cov khoom siv ntau lawm
6, Tshuab molded khoom yog transversely uneven
1. Lub parison extrusion yog skewed. Vim qhov tsis ua hauj lwm los ntawm qhov no, qhov sib txawv dav sib txawv ntawm qhov tuag yuav tsum tau kho nyob rau hauv lub sij hawm kom lub parison phab ntsa thickness uniform; Ncaj lub pwm ua ntej kaw.
2. Qhov kub ntawm qhov sib txawv ntawm sab hauv thiab sab nraud ntawm lub tes tsho pwm thiab cov pwm tseem ceeb ntawm lub tshuab moulding tshuab yog qhov loj, yog li nws yuav tsum tau nce lossis txo qhov kub ntawm lub tes tsho pwm thiab txhim kho qhov sib txawv ntawm qhov kub ntawm sab hauv thiab sab nraum tuag.
3. Cov duab ntawm cov khoom yog asymmetrical. Ua ntej pwm raug kaw, pre-clamping thiab pre-expansion ntawm lub parison yuav ua tau kom lub parison hloov mus rau nyias-phab ntsa kev taw qhia kom zoo, uas yuav txhim kho qhov teeb meem no.
4. Yog hais tias lub tshuab expansion piv ntawm parison loj heev, nws yuav daws tau los ntawm kev kho thiab txo lub tshuab expansion piv ntawm tshuab molded khoom.
7, Cov txheej txheem lossis cov duab ntawm cov khoom siv molded tsis meej
1. Yog tias cov kab noj hniav tsis zoo, kho cov pwm hauv lub sijhawm, sandblast lub kab noj hniav lossis ntxiv qhov tso pa tawm.
2. Tsis tshua muaj nqi nce siab, nce qhov nce siab ntawm lub tshuab moulding tshuab.
3. Lub melting kub ntawm lub parison yog tsawg, thiab cov khoom yog tsis plasticized zoo. Ua kom cov cua kub kub ntawm lub extruder thiab lub taub hau kom zoo, thiab ntxiv qhov tsim nyog tus nqi ntawm cov muab tub lim masterbatch yog tias tsim nyog.
4. Yog hais tias qhov txias txias ntawm pwm yog tsawg thiab cov pwm muaj condensation, cia li tsa lub pwm kub saum lub dew point kub.