Kev Siv Tshuab Extrusion rau Kev Ua Yas thiab Hom Yas Siv
Pendahuluuan
Hauv kev lag luam ntim khoom thiab khoom siv hauv tsev, ntau yam khoom yas khoob xws li lub raj mis, cov kaus poom jerry, cov thoob me me, cov tshuaj zawv plaub hau, cov thawv ntxuav khaub ncaws, thiab txawm tias cov thoob me me kuj raug tsim los ntawm kev siv cov txheej txheem tshuab pwm. Ib qho ntawm cov txheej txheem siv dav tshaj plaws yog extrusion tshuab pwm (EBM) vim tias cov txheej txheem no ceev heev, yoog tau rau ntau yam khoom loj, thiab pheej yig rau kev tsim khoom loj. Tsab xov xwm no tham txog cov ntsiab cai ua haujlwm ntawm cov txheej txheem extrusion tshuab pwm, cov theem txheej txheem, cov khoom tseem ceeb ntawm lub tshuab, nws cov txiaj ntsig thiab kev txwv, nrog rau cov hom yas uas siv ntau thiab cov laj thawj rau lawv xaiv.
Dab tsi yog Extrusion Tshuab Moulding?
Kev siv tshuab extrusion blow molding yog ib txoj kev los tsim cov yas hollow los ntawm kev extruding cov yas yaj rau hauv ib lub raj (hu ua parison), tom qab ntawd parison raug clamped los ntawm pwm thiab tshuab nrog cua pressured kom cov yas lo rau ntawm phab ntsa pwm, tsim ib yam khoom raws li tus qauv pwm.
Tsis zoo li kev txhaj tshuaj tshuab molding, uas siv cov preforms tsim los ntawm kev txhaj tshuaj, EBM tsim cov parisons ncaj qha los ntawm cov txheej txheem extrusion. Qhov no ua rau EBM zoo tagnrho rau cov khoom ntim nruab nrab mus rau loj, cov duab caj dab tsis meej, thiab cov kev xav tau ntau lawm.
Cov Ntsiab Cai Tseem Ceeb thiab Cov Txheej Txheem
Feem ntau, cov txheej txheem extrusion tshuab molding tuaj yeem piav qhia hauv cov kauj ruam hauv qab no:
1. Yaj thiab yas ntawm cov ntaub ntawv
Cov khoom siv yas raw (feem ntau yog pellets / granules) nkag mus rau hauv lub hopper thiab tom qab ntawd raug thawb los ntawm lub hau ntswj rau hauv lub thoob. Ntawm no, cov yas maj mam raug cua sov thiab yaj kom ua rau cov yas yaj sib xws.
2. Kev tsim cov parisons (cov raj yaj)
Cov yas yaj tawm los ntawm lub taub hau tuag, ua ib lub raj khoob uas dai rau hauv qab. Qhov tuab ntawm parison yog qhov tseem ceeb vim nws yuav cuam tshuam rau phab ntsa tuab ntawm cov khoom kawg.
3. Kaw pwm
Thaum lub parison ntev txog ib qho, lub pwm kaw thiab clamps lub parison. Lub hauv qab ntawm lub parison feem ntau raug pinched tawm, tsim lub hauv paus ntawm cov khoom.
4. Cua tshuab
Cov cua uas muaj siab raug tshuab los ntawm lub koob txhaj tshuaj lossis lub nozzle. Lub parison nthuav dav thiab lo rau ntawm qhov chaw pwm, tsim cov qauv ntawm cov khoom.
5. Txias
Cov pwm raug txias nrog dej ncig kom ua rau cov yas tawv. Theem txias txiav txim siab lub sijhawm voj voog thiab qhov zoo ntawm qhov loj.
6. Qhib cov pwm thiab tshem tawm cov khoom
Thaum lub pwm txias txaus lawm, ces mam li qhib lub pwm thiab muab cov khoom ntawd tshem tawm. Cov yas seem uas seem los ntawm cov txheej txheem flash yuav raug txiav tawm.
7. Kev txiav thiab ua tiav
Lub caj dab thiab lub hauv paus teeb ci tau raug txiav. Qee yam khoom xav tau kev ua ntxiv xws li kev tho qhov, kev teeb tsa lub hau / kov, lossis kev kuaj qhov xau.
Cov Cheebtsam Tseem Ceeb ntawm Extrusion Tshuab Moulding Tshuab
Qee qhov tseem ceeb hauv lub tshuab EBM suav nrog:
- Extruder (ntsia hlau & thoob): yaj thiab sib tov yas.
– Lub taub hau tuag: tsim lub parison; nws tus qauv tsim txiav txim siab qhov ruaj khov ntawm kev ntws thiab tuab.
- Pwm: tsim cov khoom kawg; muaj ib txoj kev txias.
- Lub tshuab cua tshuab: muab cua siab thiab tswj kev tshuab.
- Chav clamping: qhib thiab kaw lub pwm nrog qee lub zog clamping.
- Lub kaw lus tswj: tswj qhov kub thiab txias, siab, lub sijhawm voj voog, thiab cov txheej txheem.
Ntawm cov tshuab niaj hnub no, muaj qhov feature programming parison, uas yog qhov dynamic setting ntawm parison thickness (piv txwv li, tuab dua hauv thaj chaw tuav thiab nyias dua hauv lwm qhov chaw) los txuag cov khoom siv thiab txo cov qhov tsis zoo.
Cov Khoom Siv Ua Los Ntawm EBM
Cov txheej txheem EBM siv dav los tsim:
- Cov fwj tshuaj zawv plaub hau, xab npum ua kua thiab cov tshuaj pleev ib ce
- Lub raj mis roj nplua nyeem thiab kua dej rau tsheb
– Cov thoob ntim khoom noj thiab cov thawv ntim khoom 1–30 liv (lossis loj dua)
– Cov nkas loos me me, qee lub raj mis dej haus (nyob ntawm seb yuav tsum muaj dab tsi thaiv)
- Cov khoom ua si yas khoob, cov khoom ua si ntab, cov khoom siv tsheb khoob
- Cov thoob dej me me, cov kav dej, lossis qee yam khoom siv engineering
EBM zoo tshaj plaws rau cov khoom uas xav tau cov duab ergonomic thiab kev sib koom ua ke, xws li cov thoob tshuaj ntxuav tes.
Cov Txheej Txheem Txheej Txheem Cuam Tshuam Rau Qhov Zoo
Qee yam tseem ceeb hauv EBM:
– Qhov kub ntawm cov yas yaj: qis dhau ua rau cov yas ntws tsis zoo thiab cov nplaim tsis ntxhib; siab dhau ua rau puas tsuaj.
- Kev ceev ntawm extrusion: cuam tshuam rau kev ruaj khov ntawm parison thiab kev tsim khoom.
- Lub zog tshuab thiab lub sijhawm: txiav txim siab cov ntsiab lus ntawm qhov chaw thiab qhov tsis zoo xws li tshuab tsis tiav.
- Tsim pwm uas tsis nias: cuam tshuam rau lub zog ntawm qhov sib koom ua ke ntawm lub hauv paus/ntug.
- Kev txias ntawm pwm: cuam tshuam rau kev ntsws thiab kev hloov pauv.
Cov teeb meem uas pom ntau zaus muaj xws li phab ntsa tsis sib luag, ci ntsa iab ntau dhau, cov cim dej ntws, lossis cov xau hauv cov chaw uas raug nias tawm.
Cov Zoo thiab Cov Kev Txwv ntawm Extrusion Blow Molding
Tshaj:
- Kev tsim khoom siab rau cov khoom khoob
- Muaj peev xwm tsim cov duab nyuaj suav nrog cov tes tuav sib xyaw ua ke
- Tus nqi qis rau ib chav rau kev tsim khoom loj
- Cov khoom seem (flash) feem ntau tuaj yeem rov ua dua thiab rov siv dua hauv qee feem pua.
Cov Kev Txwv:
- Qhov tseeb ntawm qhov ntev, tshwj xeeb tshaj yog ntawm lub caj dab / xov, feem ntau qis dua li kev txhaj tshuaj.
- Tsim cov teeb ci ntsa iab uas xav tau kev txiav (ntxiv ib kauj ruam ua tiav)
- Kev tswj cov phab ntsa tuab tuaj yeem nyuaj yam tsis muaj kev pab cuam parison.
- Rau qee cov ntim khoom uas xav tau kev thaiv roj ntau (piv txwv li cov dej haus uas muaj pa roj carbonated), tus qauv EBM yuav tsis zoo tag nrho yog tsis muaj cov ntaub ntawv tshwj xeeb lossis ntau txheej.
Cov Hom Yas Siv Hauv Extrusion Blow Molding
Kev xaiv cov khoom siv nyob ntawm seb cov khoom siv kho tshuab zoo li cas, kev tiv taus tshuaj lom neeg, qhov yuav tsum tau ua kom muaj kev thaiv, kev pom tseeb, thiab tus nqi. Cov hom yas feem ntau yog:
1. HDPE (Polyethylene Ceev Siab)
HDPE yog cov khoom siv nrov tshaj plaws rau EBM, tshwj xeeb tshaj yog rau cov kaus poom jerry, cov fwj tshuaj hauv tsev, cov tshuaj ntxuav tes, thiab cov thawv ntim khoom lag luam.
Kev Zoo Tshaj Plaws:
- Tiv taus tshuaj lom neeg thiab kev cuam tshuam
- Muaj zog, ruaj khov thiab yooj yim nqa
- Yooj yim rau kev ua tiav ntawm EBM
- Tus nqi pheej yig dua
Daim Ntawv Thov: cov kaus poom jerry, lub raj mis tshuaj zawv plaub hau (uas tsis xav tau qhov meej meej), lub raj mis ntxuav, cov thawv roj.
2. LDPE thiab LLDPE (Low Density & Linear Low Density PE)
LDPE/LLDPE feem ntau yuav yoog tau yooj yim dua li HDPE.
Kev Zoo Tshaj Plaws:
- Yooj yim rau kev tawg, tiv taus kev tawg (kev ntxhov siab tawg) nyob rau hauv qee qhov xwm txheej
- Haum rau cov khoom uas xav tau "nias" lub peev xwm
Daim Ntawv Thov: lub raj mis nias, cov thawv mos, qee hom kua ntim.
3. PP (Polypropylene)
PP muaj kev tiv taus cua sov zoo dua li PE thiab muaj zog heev.
Kev Zoo Tshaj Plaws:
- Kev ua haujlwm kub dua
- Kev tiv thaiv tshuaj lom neeg zoo
- Rigid thiab lub teeb
Cov kev txwv: thaum kub qis, PP tuaj yeem tawg yooj yim dua li HDPE.
Daim Ntawv Thov: qee lub raj mis tshuaj / tshuaj lom neeg, cov thawv uas xav tau kev tiv taus cua sov zoo dua.
4. PVC (Polyvinyl Chloride)
PVC ib zaug tau siv dav rau lub raj mis vim nws qhov meej thiab yooj yim ntawm kev pwm, tab sis nws siv tau poob qis hauv qee lub tebchaws / kev lag luam vim muaj kev txhawj xeeb txog ib puag ncig thiab cov khoom ntxiv.
Kev Zoo Tshaj Plaws:
- Yuav pom tseeb thiab ci ntsa iab heev
- Cov khoom thaiv kev zoo txaus rau qee yam kev siv
Lus Cim: Cov txheej txheem PVC yuav tsum tau tswj hwm nruj kom tiv thaiv kev puas tsuaj ntawm thermal (HCl tso tawm).
Daim Ntawv Thov: qee lub raj mis pleev kom zoo nkauj lossis cov ntim tshwj xeeb (nyob ntawm cov cai).
5. PETG thiab Qee Cov Khoom Siv "Polyester" (tsis tshua muaj nyob rau hauv EBM)
Rau cov khoom uas xav tau kev pom tseeb thiab zoo nkauj, qee cov chaw tsim khoom siv qee cov ntaub ntawv polyester, txawm hais tias PET ib txwm muaj feem ntau ua tiav los ntawm kev txhaj tshuaj ncab tshuab molding.
Daim Ntawv Thov: ntim khoom kom zoo nkauj, qee lub raj mis tso saib.
6. Ntau txheej (Co-extrusion Tshuab Moulding): EVOH, PA (Nylon), thiab Adhesive Resin
Rau cov kev xav tau siab ntawm kev thaiv (piv txwv li, tiv taus cov pa oxygen, aromas, lossis cov kuab tshuaj), EBM tuaj yeem ua tiav los ntawm ntau txheej co-extrusion, qhov twg ntau txheej ntawm cov khoom siv tau extruded tib lub sijhawm.
– EVOH (Ethylene Vinyl Alcohol): muaj cov pa oxygen ntau; siv ua txheej nruab nrab.
- PA/Nylon: thaiv zoo dua thiab tiv taus cov hydrocarbons.
– Txheej khi/cov roj nplaum: pab kom lo rau ntawm cov txheej uas nyuaj rau lo ua ke.
Daim Ntawv Thov: cov thoob roj me me, qee cov ntim tshuaj / tshuaj lom neeg, cov fwj uas xav tau kev tiv thaiv tsw qab.
Cov Kev Xav Txog Kev Xaiv Khoom Siv
Thaum xaiv cov yas rau EBM, cov lag luam feem ntau xav txog:
- Cov kev cai ntawm lub zog thiab kev cuam tshuam (HDPE zoo dua)
- Kev tiv thaiv tshuaj lom neeg rau cov ntsiab lus ntawm cov khoom (PE thiab PP feem ntau zoo heev)
- Cov kev cai ntawm qhov tsos/kev pom tseeb (qee yam PVC lossis polyester)
- Kev thaiv tiv thaiv roj / aroma (multilayer nrog EVOH / PA)
- Yooj yim rau kev siv dua tshiab (cov khoom siv ib leeg xws li HDPE yooj yim dua li ntau txheej)
- Cov nqi khoom siv thiab cov nqi tsim khoom
Kev kaw
Kev siv tshuab extrusion blow molding yog ib txoj kev tseem ceeb hauv kev tsim cov khoom yas hollow vim nws ua haujlwm tau zoo, yoog tau, thiab tsim nyog rau kev tsim khoom ntau. Cov txheej txheem suav nrog kev tsim parison los ntawm kev extrusion, pwm clamping, cua tshuab, txias, thiab trimming. Cov khoom siv feem ntau yog HDPE, ua raws li LDPE/LLDPE thiab PP, thaum PVC thiab qee cov ntaub ntawv polyester siv rau cov kev xav tau tshwj xeeb. Rau cov ntawv thov uas muaj kev xav tau siab, ntau txheej co-extrusion technology nrog EVOH lossis PA yog ib qho kev daws teeb meem tseem ceeb.
Yog tias koj xav tau, kuv tuaj yeem hloov kho tsab xov xwm no mus rau hauv ib qho version uas muaj kev txawj ntse ntau dua (nrog rau cov txheej txheem kub, hom taub hau tuag, kev suav cov tuab ntawm parison, thiab cov piv txwv ntawm cov khoom tsim tawm) lossis ib qho version yooj yim dua rau cov haujlwm hauv tsev kawm ntawv/tsev kawm qib siab.
