Rau PVC, lubntsia hlau lub cevyuav tsum muaj sia nyob corrosion zoo li hnav - PVC tso tawm hydrochloric acid raws li nws cov txheej txheem, thiab cov fillers zoo li calcium carbonate ntxiv abrasion. Qhov ntawd taw qhia rau abimetallic ntsia hlau thoobnrog cov txheej txheem corrosion-resistant alloy, tsis yog ib qho yooj yim nitrided. Muab nws rau lub tshuab zoo - lub conical ntxaib ntsia hlau rau cov yeeb nkab thiab cov kab sib txuas, sib npaug rau cov zis ntau dua - thiab tsim cov ntsia hlau rau qis, txawm tias shear los tiv thaiv cov khoom siv cua sov no.
PVC yog ib qho ntawm cov yas extruded ntau tshaj plaws hauv ntiaj teb. Nws kuj yog ib qho nyuaj tshaj plaws ntawm cov khoom siv uas ua rau nws. Xaiv qhov tsis ncaj ncees lawmntsia hlau chim rau PVCthiab koj tsis yog hnav nws thaum ntxov - koj tau txais corrosion pitting, dub specks, thiab ib lub thoob uas yog seem nyob rau hauv ob peb xyoos.
Yog li phau ntawv qhia no yog siv tau. Dab tsi ua rau PVC tawv ntawm lub thoob, qhov saum npoo thiab lub tshuab xaiv uas tuav tau tiag tiag, thiab yuav ua li cas qhia ib qho uas kav ntev. Peb tsim screws thiab chim rau PVC yeeb nkab, profile, thiab board txhua lub lim tiam, yog li tsis muaj qhov no yog txoj kev xav. Thiab yog tias koj tab tom nrhiav kev hloov pauv vim tias koj lub thoob tam sim no corroding los yog hnav, tib lub logic qhia koj tias yuav kho li cas thiab yuav ua li cas rau spec tus tom ntej kom tsis txhob tshwm sim dua. Rau cov ntsiab lus dav dav ntawm hom, cov khoom siv, thiab kev xaiv, saib pebextruder ntsia hlau chim phau ntawv qhia.
Yog vim li cas PVC yog ib qho nyuaj rau lub taub hau taub hau
Ob yam ua ke ntawm cov hlau. Ua ntej, corrosion. Raws li PVC heats thiab cov txheej txheem, nws muab tawm hydrogen chloride - thiab nrog cov dej noo tam sim no, uas yog hydrochloric acid, uas tawm tsam cov hlau zoo tib yam thiab noj ncaj qha los ntawm daim tawv nqaij nyias nitrided. Muab pov rau hauv cov nplaim hluav taws kub hnyiab los yog pob txha stabilizer thiab cov chemistry tau zoo dua.
Thib ob, kev puas tsuaj. Feem ntau cov sib xyaw ua ke ntawm PVC muaj cov khoom ntim - calcium carbonate saum toj no tag nrho - ntxiv rau cov xim thiab cov hloov pauv uas ua rau lub davhlau ya nyob twg thiab cov bore zoo li cov ntawv xuab zeb zoo. Yog li PVCntsia hlau lub cevyuav siv ob npaug: tshuaj corrosion thiab mechanical hnav, tib lub sijhawm. Ib qho chaw uas tuav ib qho tab sis tsis yog lwm qhov yooj yim yuav tsis kav ntev.
Nyob rau sab saum toj ntawm ob, PVC ua haujlwm nyob rau hauv lub qhov rais nqaim. Nws xav tau cua sov txaus rau plasticize tab sis degrades saum toj no - thiab degradation tso tawm ntau hydrogen chloride, uas pub cov corrosion. Lub voj voog vicious. Yog li lub thoob tsis yog tsuas yog sib ntaus sib tua acid thiab muab tub lim; nws ua nws thaum cov txheej txheem khiav ze rau ntawm ntug ntawm qhov polymer yuav zam.
Txoj Cai Nto: Vim li cas Bimetallic Yeej rau PVC
Qhov no yog vim li cas bimetallic yog tus qauv hu rau PVC. Abimetallic ntsia hlau thoobfuses ib txheej corrosion- thiab hnav-resistant alloy-nickel-raws li, los tiv thaiv PVC lub corrosion - mus rau ib tug tawv puag steel. Cov txheej ntawd yog ob peb millimeters tuab thiab nyuaj dua li cov tawv nqaij nitrided, yog li qhov twg ib qho yooj yim nitrided chim pits thiab hnav los ntawm, lub bimetallic txheej shrugs tawm ob lub kua qaub thiab muab tub lim.
Ntawm peb tus kheej bimetallic barrels peb coj lub bore mus rau ib ncig ntawm 62 HRC, qhov twg ntau lub khw nres ntawm 58. Qhov kev lag luam tag nrho yog nyob rau hauv peb phau ntawv qhia.bimetallic vs nitrided ntsia hlau chim. Rau PVC, luv luv version yog qhov no: mus bimetallic, thiab xyuas kom meej tias cov alloy yog xaiv rau corrosion kuj, tsis yog hardness xwb. Ib txheej tawv uas tseem corrodes yog txheej tsis ncaj ncees lawm.
Ib leeg, Twin, lossis Conical rau PVC?
PVC khiav ntawm ntxaib screws deb ntau tshaj ib leeg, vim hais tias qhov zoo conveying muab qhov meej, maj mam tswj cov khoom siv cua sov no. Rau compact yeeb nkab thiab profile kab, lubconical twin ntsia hlauyog qhov kev xaiv ib txwm muaj - lub caj pas dav pub siv cov hmoov qhuav thiab lub tshuab ua kom lub zog siab ntawm qhov qis qis. Rau cov zis ntau dua, cov cav tov sib npaug sib npaug sib npaug.
Peb tshem tawm qhov kev txiav txim siab hauvconical vs parallel twin ntsia hlauthiabib leeg ntsia hlau vs ntxaib ntsia hlaucov extruders. Tab sis qhov twg configuration koj tsaws nyob rau hauv, lub nto logic saum toj no tsis hloov. Rau PVC, cov lus teb yog bimetallic.
Screw thiab chim tsim rau PVC
Nto yog ib nrab ntawm zaj dab neeg; geometry yog lwm ib nrab. Vim tias PVC degrades nrog cua sov thiab lub sij hawm, cov ntsia hlau yog tsim los rau tsawg, txawm shear thiab ib tug luv luv, tswj chaw nyob - tsuas yog txaus rau plasticize cov khoom tsis scorching nws. Kub yog tuav nruj raws lub thoob. Tau txais cov ntaub ntawv compression lossis thaj chaw tshav kub tsis ncaj ncees lawm thiab PVC qhia koj ib zaug, nrog kev hloov xim thiab degradation streaking los ntawm cov khoom.
Qhov no yog engineered-rau-cov ntaub ntawv ua hauj lwm, uas yog vim li cas ib tug drawing-raws li, ua-rau-spec chim yeej ib tug generic rau PVC. Ib lub thoob txiav rau ib tug huv polyolefin thiab nias rau hauv PVC kev pab cuam yuav tawm tsam koj ntawm zoo ntev ua ntej nws hnav tawm.
L / D piv thiab compression yog teem rau tib txoj kev kho mob. PVC feem ntau nyiam qhov nruab nrab L / D thiab qis dua qhov sib piv dua li polyolefin, yog li cov khoom siv tau ua haujlwm thiab ua kom sov ntau dua li slammed. Thawb lub compression nyuaj heev thiab koj tsim shear tshav kub lub polymer tsis tuaj yeem nqa. Nws yog lub qhov rais nqaim, thiab ntaus nws ntseeg tau yog vim li cas PVC screws tau tsim nyob ib ncig ntawm qhov chaw tshwj xeeb, tsis rub tawm ntawm lub txee.
Qhuav Blend los yog Pellets? Nws Hloov Pub
Yuav ua li cas koj pub cov PVC zoo li cov ntsia hlau thiab chim ntau npaum li cov polymer ua. Feem ntau nruj PVC khiav raws li kev sib xyaw qhuav - cov hmoov tsis tshua muaj ntawm cov cob, stabilizer, muab tub lim, thiab cov hloov pauv sib xyaw hauv lub tshuab ua kom siab. Cov hmoov ntawd yog qhov loj thiab tsis yooj yim rau kev xa tawm, uas yog vim li cas lub conical ntxaib ntsia hlau, nrog rau nws lub caj pas dav, tau los ua tus qauv: nws rub cov sib tov thiab ua kom nws zoo. Pelletized PVC compound, los ntawm qhov sib piv, pub ntau dua li cov khoom qub thiab haum rau lub tshuab ua ke. Yog li thaum koj muab lub thoob, hais tias daim ntawv twg koj pub - nws taw qhia ncaj qha rau qhov chaw pub khoom noj, thiab feem ntau rau lub tshuab hom nws tus kheej.
PVC yeeb nkab, Profile, UPVC thiab CPVC: Tsis yog txhua yam
"PVC" npog ntau txoj haujlwm, thiab qhov sib txawv hloov cov spec:
- Rigid UPVC yeeb nkab- daim ntawv thov classic conical twin ntsia hlau; qhuav-blend hmoov pub, bimetallic chim.
- Profile thiab qhov rais systems- Cov kev teeb tsa zoo sib xws, feem ntau nrog cov khoom ntim ntau dua uas nce qhov kev thov puas.
- CPVC (chlorinated PVC)- Txawm tias ntau corrosive thiab kub-rhiab heev, yog li corrosion-resistant alloy thiab nruj kub tswj qhov tseem ceeb tshaj.
- Flexible PVC- plasticized thiab qis-kub, ib tug txawv ntsia hlau tsim dua.
Qhia koj tus kws tsim lub thoob raws nraim qhov twg PVC thiab cov khoom twg koj khiav, vim nws tsav cov ntsia hlau geometry thiab qee zaum cov hlau xaiv. "PVC chim" tsis yog qhov ua tiav ntawm nws tus kheej.
Feem ntau cov teeb meem PVC thiab lawv qhia koj li cas
Yog tias koj cov kab PVC twb ua tsis ncaj ncees lawm, cov tsos mob taw qhia qhov chaw:
- Dub specks thiab hlawv- cov khoom degrading nyob rau hauv hnav qhov khoob lossis zaum ntawm qhov chaw corroded.
- Pitting ntawm lub hau ntswj los yog bore- corrosion, feem ntau kos npe rau saum npoo yog qhov tsis ncaj ncees lawm spec rau PVC.
- Tso zis poob ntawm tib qhov ceev- hnav qhib lub clearance.
- Discoloration los ntawm cov khoom- Thaum tshav kub kub los yog nyob hauv lub sij hawm tawm ntawm qhov chaw.
Thawj peb feem ntau txhais tau hais tias lub thoob tsis tau teev tseg rau PVC, lossis nws tsuas yog hnav tawm. Peb qhia rauthaum twg los hloov ib lub taub hau ntsia hlautaug kev los ntawm kev ntsuas nws ua ntej koj txiav txim siab.
Khaws ib lub thawv PVC ciaj sia
PVC rau txim tsis saib xyuas hnyav dua li cov yas feem ntau, thiab ib tus cwj pwm tseem ceeb tshaj plaws yog qhov no: tsis txhob tso PVC zaum hauv lub thoob kub. Tuav ntawm qhov kub thiab txias tsis muaj ntws, nws degrades, tso tawm ntau hydrogen chloride, thiab corrodes lub bore los ntawm sab hauv - ib tug nres kab nrog ib tug tag nrho chim yuav ua tau tiag tiag puas nyob rau hauv feeb. Tshem tawm nrog cov khoom ruaj khov, sib xws ua ntej txhua qhov kev ncua lossis kaw, thiab ua kom sov sai sai.
Ob peb tus cwj pwm ntxiv ua rau lub neej ntawm PVCntsia hlau lub cev: khaws cov khoom noj kom huv ntawm cov hlau thiab grit, tuav lub ntsuas kub kom nruj kom cov polymer tsis txhob overheats, thiab cov ntaub ntawv tshem tawm ntawm txhua qhov kev pabcuam yog li hnav tsis txhob ua rau koj xav tsis thoob. Tsis muaj qhov nyuaj. Tab sis ntawm PVC, hla nws yog li cas lub thoob zoo hloov mus rau hauv seem xyoo ntxov.
Yuav ua li cas qhia thiab xaj PVC Screw chim
Cov spec huv si tau txais koj cov lus hais meej thiab ib lub thoob uas poob rau hauv thiab khiav. Xa koj tus tsim:
- Tshuab ua thiab qauv- kom haum haum, ntev, thiab mounting.
- Screw txoj kab uas hla thiab L / D, los yog daim duab qub.
- Koj li PVC- UPVC, CPVC, hloov tau - thiab muab tub lim.
- Khoom thiab tso zis- yeeb nkab loj, profile, phiaj kg/h.
- Ib qho qauv lossis duabntawm qhov hnav, yog tias nws yog qhov hloov.
Los ntawm muaj ib tug zoo tsim qhia qhov nto (bimetallic rau PVC), ntsia hlau geometry, thiab cov hlau, ces quotes tawm tsam koj cov zauv tiag tiag es tsis yog ib tug generic catalogue.
Tsis muaj duab? Qhov ntawd yog qhov zoo - tus qauv hnav yog txaus rau rov qab-engineer ib qho kev hloov pauv, lossis ib qho kev hloov kho dua tshiab nrog lub ntsej muag bimetallic tawv dua li qhov koj so haujlwm. Txawm li cas los xij, koj tau txais ib lub thoob haum rau koj lub PVC thiab koj lub tshuab, tsis yog qhov ze-tsawg catalog uas tawm tsam koj los ntawm ib hnub.
Vim Li Cas Ua Haujlwm Nrog Nanhaiya
PVC yog qhov tseem ceeb rau peb ua. Rau ntau tshaj nees nkaum xyoo peb tau tsimPVC yeeb nkab ntsia hlau chim, conical ntxaib ntsia hlau teeb, thiab cov kab sib txuas hauv 38CrMoAlA thiab bimetallic alloys, noj cov bimetallic bore mus rau ib ncig ntawm 62 HRC rau cov corrosion thiab hnav PVC pov rau nws. Peb tsim cov kev hloov pauv sib xws nrog cov hom loj xws li KraussMaffei, Cincinnati, thiab Jwell, ua haujlwm los ntawm koj tus qauv, kos duab, lossis qauv. Khiav mus rau hauv PVC corrosion los yog hnav ntawm lub kaus mom hnav? Xauj pebhloovntau lossis xa ib daim duab kos, thiab koj yuav muaj cov lus hais raws li hauv kaum ob teev.
Qhia lossis hloov PVC ntsia hlau chim? Xa koj lub tshuab thiab PVC hom - tau txais kev pom zoo bimetallic thiab hais lus tsis pub dhau 12 teev.
Tau txais ib daim ntawv pov thawj PVCCov lus nug nquag
Vim li cas PVC corrode lub taub hau taub hau?
Raws li PVC ua kom sov thiab cov txheej txheem, nws muab tawm hydrogen chloride - thiab nrog cov dej noo nyob ib puag ncig, uas dhau los ua hydrochloric acid, uas tawm tsam cov hlau zoo tib yam. Nws noj los ntawm nyias nitrided nto sai, uas yog vim li cas PVC kab xav tau ib tug corrosion-resistant bimetallicntsia hlau lub cev.
Dab tsi yog qhov zoo tshaj plaws ntsia hlau chim khoom rau PVC?
Ib lub thoob bimetallic nrog npib tsib xee-raws li, corrosion-resistant alloy txheej hla lub hauv paus tawv hlau. Nws yuav siv sij hawm ntawm ob qho tib si corrosion los ntawm PVC thiab kev puas tsuaj los ntawm cov khoom ntim xws li calcium carbonate - qhov sib xyaw ua ke uas pits thiab hnav los ntawm ib lub thoob nitrided.
Kuv puas xav tau bimetallic rau PVC, los yog nitrided txaus?
Rau nruj PVC, bimetallic yog tus qauv hu. PVC yog corrosive thiab, nrog fillers, abrasive ib yam nkaus, thiab ib tug nitrided daim tawv nqaij yog ib yam nkaus thiab nyias yuav siv sij hawm ntev. Nitrided tuaj yeem tau txais los ntawm qhov me me, tsis muaj dej, ua haujlwm tsawg - tab sis rau PVC, bimetallic yog qhov kev xaiv nyab xeeb.
Yam extruder twg yog qhov zoo tshaj plaws rau PVC yeeb nkab?
Feem ntau yog ib tug ntxaib ntsia hlau, rau nws cov meej, maj mam cua sov tswj. Compact me me thiab nruab nrab-loj kab lean ntawm lub conical ntxaib ntsia hlau thiab nws lub caj pas dav pub rau cov hmoov qhuav; cov kab ntau dua cov zis txav mus rau qhov sib npaug ntawm cov tshuab tig tig.
Koj puas tuaj yeem hloov PVC ntsia hlau chim rau kuv lub tshuab?
Yog lawm. Peb tsim bimetallic PVC ntsia hlau thiab chim teeb uas haum loj extruder hom - KraussMaffei, Cincinnati, Jwell - ua hauj lwm los ntawm koj lub tshuab qauv, ib tug kos duab, los yog ib tug qauv. Xa cov ntsiab lus rau nqe lus tsis pub dhau 12 teev.
