Cov Txuj Ci Tshuab Pwm Rau Kev Tsim Yas thiab Hom Yas Siv
Kev tshuab pwm yog ib qho ntawm cov txheej txheem tsim yas siv dav tshaj plaws rau kev tsim cov khoom khoob xws li lub raj mis dej haus, cov kaus poom jerry, cov thoob dej me me, cov thoob dej me me, cov khoom ua si, thiab txawm tias qee yam khoom siv hauv tsheb. Cov txheej txheem no siv cua compressed los "tshuab" cov yas kub, yoog tau tawm tsam phab ntsa pwm, tsim cov duab kawg raws li cov pwm lub duab. Vim nws qhov ua tau zoo, ceev, thiab muaj peev xwm tsim cov khoom ntim ntau nrog cov khoom zoo sib xws, kev tshuab pwm yog qhov kev xaiv tseem ceeb rau kev ntim khoom yas thiab cov khoom siv hauv tsev.
Cov Ntsiab Cai Tseem Ceeb ntawm Cov Txheej Txheem Tshuab Moulding
Hais yooj yim xwb, kev siv tshuab pwm siv peb yam tseem ceeb: yas uas raug cua sov kom ua yas, pwm uas ua rau sab nraud ntawm cov khoom, thiab cua uas muaj siab uas yuam kom cov yas lo rau ntawm phab ntsa pwm. Cov yas nyoos feem ntau yog cov pellets (granules) uas yaj hauv lub tshuab extruder lossis hauv lub thoob ntawm lub tshuab. Cov yas yaj ces raug tsim ua parison (lub raj yas mos) lossis preform (lub preform zoo ib yam li lub raj me me uas muaj lub raj mis tiav). Tom qab ntawd parison/preform raug ntxig lossis clamped rau hauv pwm thiab tshuab nrog cua los ntawm lub tshuab cua lossis lub pas nrig cua kom nthuav dav thiab ua raws li cov duab ntawm pwm.
Theem kawg yog txias. Feem ntau cov pwm muaj cov kav dej txias (dej txias) los ua kom cov khoom khov thiab tswj tau qhov ntev. Thaum txias txaus, cov pwm qhib, cov khoom raug tshem tawm, thiab txhua yam khoom seem, xws li flash (yas seem ntawm kab pwm) lossis tail (qab seem), raug txiav. Hauv qee qhov kev siv, cov txheej txheem txuas ntxiv mus nrog kev tshuaj xyuas qhov xau, kev teeb tsa lub hau, kev sau ntawv, lossis kev ntim khoom.
Hom Tshuab Pwm
Txawm hais tias lub hauv paus ntsiab lus zoo ib yam - tshuab yas rau hauv pwm - tshuab pwm muaj ntau yam txheej txheem sib txawv. Txhua tus raug xaiv raws li qhov xav tau ntawm cov khoom, hom khoom siv, thiab cov nqi tsim khoom.
1. Extrusion Tshuab Moulding (EBM)
Kev Siv Tshuab Pwm Extrusion yog txoj kev siv ntau tshaj plaws los ua cov fwj thiab cov kaus poom los ntawm HDPE lossis PP. Cov txheej txheem pib nrog lub tshuab extruder uas extrude ib daim yas yaj uas zoo li lub raj (parison). Lub parison raug clamped ntawm ob sab ntawm lub pwm, tom qab ntawd cua raug tshuab rau hauv nws kom nthuav dav thiab lo rau lub pwm.
Qhov zoo ntawm EBM suav nrog kev ywj pheej rau ntau yam khoom loj, lub peev xwm los tsim cov thawv nrog cov tes tuav nyuaj, thiab cov nqi cuab yeej sib tw. Qhov tsis zoo yog tias phab ntsa tuab feem ntau tsis sib xws dua li lwm cov txheej txheem vim tias parison tuaj yeem sag ua ntej pwm kaw, tshwj xeeb tshaj yog rau cov khoom loj. Txhawm rau daws qhov no, parison programming siv, uas tswj hwm qhov tuab ntawm parison thaum lub pwm tawm cov yas.
Cov ntawv thov siv ntau: lub raj mis tshuaj zawv plaub hau, cov kaus poom tshuaj ntxuav tes, lub raj mis roj, cov thawv tshuaj hauv tsev, cov thoob me me.
2. Txhaj Tshuab Moulding (IBM)
Kev Txhaj Tshuaj Tshuab Moulding ua ke kev txhaj tshuaj thiab kev tshuab. Ua ntej, yas raug txhaj rau hauv pwm kom ua ib qho preform hla lub pas nrig tseem ceeb. Tom qab ntawd preform raug xa mus rau pwm tshuab, cua sov / tempered, thiab tshuab kom ua tiav cov khoom kawg.
Qhov zoo ntawm IBM yog kev tswj qhov ntev zoo heev, tshwj xeeb tshaj yog nyob rau hauv lub caj dab tiav, qhov chaw tiav zoo nkauj, thiab tsawg kawg nkaus flash pov tseg. Txoj kev no yog qhov tsim nyog rau cov fwj me me mus rau nruab nrab uas xav tau kev ua haujlwm siab. Qhov tsis zoo yog tias nws tsis zoo tagnrho rau cov khoom loj dua, thiab cov cuab yeej feem ntau yuav nyuaj dua.
Cov ntawv thov ib txwm muaj: cov fwj tshuaj, cov fwj me me rau cov khoom siv pleev ib ce, cov ntim khoom zoo.
3. Kev Txhaj Tshuaj Ncab Tshuab Moulding (ISBM)
ISBM yog ib qho version uas ntxiv cov txheej txheem ncab ua ntej lossis thaum lub sijhawm tshuab. Lub preform (feem ntau yog PET) raug cua sov rau qhov kub thiab txias, tom qab ntawd ncab ntev nrog ib tug pas nrig ncab thiab tshuab radially. Qhov kev ncab ob sab no ua rau muaj kev taw qhia molecular uas txhim kho lub zog, kev meej, thiab qee yam khoom thaiv.
Qhov zoo ntawm ISBM yog tias nws tsim cov fwj uas tsis hnyav tab sis muaj zog, pob tshab, thiab tiv taus qhov siab sab hauv - zoo meej rau cov dej haus uas muaj pa roj carbonated. Qhov tsis zoo yog tias nws feem ntau txwv rau qee cov ntaub ntawv (tshwj xeeb tshaj yog PET) thiab cov duab fwj tsim nyog.
Cov ntawv thov siv ntau: cov fwj dej haus, cov fwj dej qab zib, qee cov fwj kua txiv hmab txiv ntoo, cov ntim khoom pob tshab zoo tshaj plaws.
Cov Txheej Txheem Tseem Ceeb hauv Kev Siv Tshuab Molding
Qhov zoo ntawm cov khoom siv tshuab molding yog cuam tshuam los ntawm ntau yam txheej txheem tseem ceeb:
1. Qhov kub ntawm pwm yaj thiab qhov kub ntawm pwm: Kub dhau ua rau lub parison yooj yim poob thiab phab ntsa nyias thiab tsis sib luag; txias dhau ua rau tsis nthuav dav lossis nto ntxhib.
2. Lub zog cua thiab lub sijhawm tshuab: Txheeb xyuas lub peev xwm ntawm cov yas kom ua raws li cov ntsiab lus ntawm pwm thiab cuam tshuam rau qhov tuab kawg.
3. Tsim qauv Parison/preform: Qhov tuab pib thiab nws qhov kev faib tawm txiav txim siab qhov tuab ntawm phab ntsa ntawm cov khoom.
4. Qhov txias ntawm cov khoom: Qhov no yuav cuam tshuam rau lub voj voog tsim khoom thiab qhov ruaj khov ntawm qhov loj. Qhov txias tsis sib npaug yuav ua rau deformation.
5. Cov ntaub ntawv thiab cov khoom ntxiv: Cov tshuaj txhawb zog, cov xim, cov tshuaj UV stabilizers, lossis cov neeg sawv cev antistatic tuaj yeem hloov pauv qhov yaj thiab cov khoom ntawm cov khoom kawg.
Hom Yas Siv Hauv Tshuab Moulding
Tsis yog txhua yam yas uas siv tau rau kev tshuab pwm. Cov khoom siv yuav tsum muaj lub zog yaj txaus (tsis yooj yim "poob" thaum cua sov), yuav tsum rub tau thiab tshuab tau yam tsis muaj kev rhuav, thiab muab cov khoom siv kho tshuab/tshuaj lom neeg tsim nyog rau kev siv. Cov hom yas feem ntau yog:
1. HDPE (High-Density Polyethylene)
HDPE yog "lub hauv paus" ntawm kev siv tshuab extrusion blow molding. Cov khoom no tiv taus kev cuam tshuam, tiv taus tshuaj lom neeg, thiab pheej yig. HDPE kuj tseem siv tau rau cov khoom uas xav tau kev tiv taus cov tshuaj ntxuav tes, cov tshuaj ntxuav tes, thiab ntau yam tshuaj hauv tsev. Cov fwj HDPE feem ntau tsis pom tseeb (tsis meej), txawm hais tias lawv tuaj yeem ua tau ib nrab pob tshab.
Kev Siv: cov kaus poom jerry, qee lub raj mis mis, lub raj mis tshuaj zawv plaub hau/xab npum, cov thawv roj, cov thoob me me.
2. LDPE (Polyethylene Qis-Density) thiab LLDPE
LDPE muaj kev ywj pheej ntau dua li HDPE thiab muaj kev tiv thaiv kev tawg zoo. LLDPE feem ntau siv los ua kom muaj zog. Ob qho tib si tuaj yeem siv rau hauv EBM rau cov khoom uas xav tau kev ywj pheej, xws li lub raj mis uas tuaj yeem nias tau. Txawm li cas los xij, nws muaj kev ywj pheej qis dua, ua rau nws tsis haum rau cov thawv khov kho.
Daim Ntawv Thov: lub raj mis nias, cov thawv hloov pauv tau, qee cov ntim khoom kom zoo nkauj.
3. PP (Polypropylene)
PP muaj kev tiv taus cua sov zoo dua li PE, nrog rau kev tiv taus tshuaj lom neeg zoo. Txawm li cas los xij, PP xav tau kev tswj hwm cov txheej txheem ceev faj vim nws qhov kev ntswj thiab kev ua kom zoo nkauj. Hauv kev tshuab molding, PP feem ntau raug xaiv rau cov thawv uas xav tau kev tiv taus kub siab dua lossis kev txhim kho kev tawv.
Daim Ntawv Thov: qee cov fwj tshuaj lom neeg, cov thawv ntim khoom lag luam, qee cov ntim khoom noj.
4. PET (Polyethylene Terephthalate)
PET yog lub npe hu ua cov txheej txheem txhaj tshuaj rau cov fwj dej haus. Cov txiaj ntsig ntawm PET suav nrog kev pom tseeb siab, lub zog zoo, lub teeb yuag, thiab khaws cov pa roj zoo (tshwj xeeb tshaj yog thaum tsim los rau carbonation). PET kuj tseem zoo rau kev tsim khoom ntau nrog lub sijhawm voj voog sai thiab lub raj mis hnyav.
Cov ntawv thov: cov fwj dej ntxhia, cov fwj dej qab zib, cov fwj tshuaj yej, qee lub fwj kua ntses (tshwj xeeb tshaj yog cov uas xav tau qhov pom tseeb).
5. PVC (Polyvinyl Chloride) - tsawg zuj zus
PVC ib zaug tau nrov vim nws muaj peev xwm tsim cov fwj ntshiab thiab nws yooj yim rau kev ua. Txawm li cas los xij, nws siv tau poob qis vim muaj kev txhawj xeeb txog ib puag ncig, kev cai lij choj, kev nyuaj ntawm kev rov ua dua tshiab, thiab qhov muaj peev xwm tso tawm qee yam tshuaj yog tias siv tsis raug. Kev siv PVC hauv cov fwj tam sim no raug txwv ntau ntxiv hauv ntau lub tebchaws thiab kev lag luam.
Daim ntawv thov: qee cov ntim khoom tshwj xeeb uas tsis yog khoom noj (nyob ntawm cov cai hauv zos).
6. PS (Polystyrene) thiab HIPS
Polystyrene siv tau rau qee yam kev siv, tab sis nws feem ntau yuav tawg yooj yim dua li PE lossis PET. Vim nws tsis tshua muaj zog tiv taus kev cuam tshuam, nws siv rau hauv kev tshuab molding tsis tshua muaj ntau npaum li HDPE lossis PET. HIPS (High Impact Polystyrene) txhim kho kev tawv, tab sis tseem muaj kev txwv.
Daim Ntawv Thov: qee cov ntim khoom uas tsis tshua muaj zog thiab tus nqi yuav tsum tau ua, tab sis tsis xav tau kev tiv taus kev cuam tshuam siab.
7. Cov Khoom Siv Engineering thiab Multilayer (Co-extrusion)
Rau cov kev xav tau tshwj xeeb—xws li tsw ntxhiab, roj, lossis cov tshuaj tiv thaiv—kev lag luam siv cov qauv ntau txheej xws li HDPE/EVOH/HDPE lossis ntxiv cov txheej tiv thaiv. EVOH (ethylene vinyl cawv) muab cov khoom tiv thaiv roj zoo, thaum lwm cov txheej tswj tau lub zog thiab kev sib raug zoo ntawm cov txheej txheem. Co-extrusion blow molding tso cai rau ntau txheej kom raug extruded tib lub sijhawm, tso cai rau ib yam khoom kom muaj kev sib xyaw ua ke ntawm cov khoom uas yuav nyuaj rau ua tiav nrog ib yam khoom.
Daim ntawv thov: cov thoob roj me me, cov khoom ntim tshuaj lom neeg hnyav, cov khoom ntim uas xav tau cov teeb meem siab.
Cov Zoo thiab Cov Teeb Meem ntawm Kev Siv Tshuab Molding
Cov txiaj ntsig ntawm kev siv tshuab pwm suav nrog cov nqi tsim khoom tsawg rau ib chav ntawm cov ntim ntau, lub peev xwm los tsim cov khoom hollow zoo, thiab tsim kev ywj pheej rau ntau daim ntawv thov. Cov teeb meem yog tswj cov phab ntsa tuab, txo cov qhov tsis zoo xws li pinholes, warpage, lossis weld kab, thiab xyuas kom meej qhov zoo ntawm kev sib koom ua ke thiab kev tiv thaiv xau. Ntxiv mus, cov qauv kev ruaj khov yog tsav tsheb siv cov khoom siv rov ua dua tshiab (PCR) thiab cov qauv ntim khoom rov ua dua tshiab (mono-material) yooj yim dua, uas xav tau kev hloov kho cov txheej txheem thiab kev tswj hwm zoo dua.
Kev kaw
Kev tshuab pwm yog lub hauv paus tseem ceeb ntawm kev tsim ntau yam khoom yas khoob - los ntawm cov fwj me me mus rau cov kaus poom loj - ua tsaug rau nws qhov ua tau zoo, ceev, thiab yooj ywm. Kev xaiv txoj kev (EBM, IBM, lossis ISBM) raug cuam tshuam los ntawm lub hom phiaj duab, qhov tseeb, qhov loj me, thiab cov kev xav tau kho tshuab. Ib yam li ntawd, cov hom yas xws li HDPE, PP, thiab PET raug xaiv raws li lawv cov yam ntxwv tseem ceeb: lub zog, kev tiv thaiv tshuaj lom neeg, pob tshab, kev tiv thaiv cua sov, thiab cov kev xav tau thaiv. Nrog kev tswj hwm meej ntawm cov txheej txheem txheej txheem thiab kev xaiv cov khoom siv tsim nyog, kev tshuab pwm tuaj yeem tsim cov khoom lag luam zoo sib xws, pheej yig uas ua tau raws li cov kev xav tau ntawm kev ua lag luam niaj hnub no, suav nrog qhov zoo thiab kev ruaj khov.
Yog tias koj xav tau, kuv tuaj yeem hloov kho tsab xov xwm no rau tsev kawm ntawv/tsev kawm qib siab (ntau yam theoretical), kev xav tau kev lag luam (ntau yam kev siv tshuab: qhov kub/siab, kev tsim qauv parison, qhov tsis zoo uas tshwm sim), lossis tsim ib qho version nrog cov ntaub ntawv sau thiab cov lus hais.
