Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) yog ib qho ntawm cov thermoplastic polyethylene.Kuj tseem hu ua high-modulus polyethylene, (HMPE),…
Ultra High Molecular Nyhav polyethylene (UHMW-PE) yog ib qho khoom siv thermoplastic uas muaj qhov hnyav molecular ntau dua 3.1 AMUs (atomic mass units).Lub siab molecular hnyav txhim kho ntau yam khoom tseem ceeb ntawm lub cev, tsis yog qhov tsawg tshaj plaws uas yog qhov ua tau zoo ntawm kev puas tsuaj, kev cuam tshuam lub zog siab thiab qis coefficient ntawm kev sib txhuam.Tsis tas li ntawd, cov khoom siv polymer muaj cov tshuaj tiv thaiv zoo, zoo heev lub suab dampening yam ntxwv, superior dielectric thiab hluav taws xob insulating zog thiab nws tsis nqus noo noo.
Cov khoom no, ua ke nrog kev yooj yim ntawm machining, ua UHMW-PE, cov khoom siv tau zoo uas ua tau raws li FDA thiab USDA cov cai rau kev sib cuag zaub mov ncaj qha, nws tau siv dav hauv cov khoom noj, dej haus, kev kho mob thiab kev lag luam tshuaj.Qhov tsis zoo ntawm UHMW-PE inhibits kev loj hlob ntawm fungus lossis kab mob.UHMW-PE kuj tau siv dav hauv textile, tshuaj ua haujlwm, pulp thiab ntawv, mining, maritime, steel, dej thiab dej phwj kho mob, bulk khoom tuav thiab kev ua liaj ua teb industries.
UHMW-PE cov khoom tuaj yeem txhim kho los ntawm kev siv cov khoom siv ntxiv xws li cov xim pleev xim, UV thiab cov cua sov stabilizers, anti-static agents, hnav-resistant fillers thiab txhuam-txo lubricants.Cov hlau los yog ores tuaj yeem siv los ua kom qhov hnyav thiab ua kom cov polymer magnetically ntes tau, thaum lwm cov muab tub lim nce qhov kub ntawm ib puag ncig.
Vim tias UHME-PE yog ib nrab-crystalline polymer, nws yuav tsum tau sintered los ntawm compression molding los yog ram extrusion.Annealing, ua ntej machining, pab tshem tawm cov kev ntxhov siab vim los ntawm sintering.Cov khoom tiav tiav tuaj yeem ua rau annealed, tab sis cov khoom zoo li no yuav tsum tau kho thaum lub caij txias kom tso cai rau shrinkage thaum lub sij hawm annealing.Rough machining yuav tsum tau ua ua ntej kev ntxhov siab-relieving yog li qhov kev hloov pauv tuaj yeem haum rau lub sijhawm kawg machining.
Muaj nyob rau hauv cov ntawv txheeb, cov pas nrig, thiab cov raj rau ua qhov chaw ruaj khov, UHMW-PE tuaj yeem saws, milled, tig, npaj, drilled lossis xuas nrig ntaus.Cov cuab yeej txiav yuav tsum muaj cov kaum sab xis siab thiab txaus lub nkoj tshem tawm kom tsis txhob txhaws.Pub tus nqi yuav tsum siab kom lub sij hawm tsawg kawg nkaus tso cai rau cov cuab yeej txiav kom sov cov khoom los ntawm kev sib txhuam.Kev saib xyuas yuav tsum tau ua kom cov cuab yeej ntse vim tias UHMW-PE tuaj yeem ua kom nrawm nrawm ntawm cov cuab yeej txiav, ua rau muaj qhov cuam tshuam.High Quality nto finishes tuaj yeem tau los ntawm kev siv cov cuab yeej txiav kom zoo, txawm hais tias kev sim ua kom tsis zoo los ntawm kev ua tiav los yog xuab zeb feem ntau yuav ua rau cov tsos mob tsis zoo.
Feem ntau cov txheej txheem machining tuav qhov siab ntawm +/-.005 thiab +/-.010.Pom txiav strips kom ntev, txawm li cas los xij, feem ntau yuav yog +/-.030 txij li tus nqi siab ntawm linear thermal expansion thiab contraction UHMW-PE ua rau qhov ntev ntawm ib thooj tsis zoo rau kev hloov ib puag ncig.
Cov txheej txheem Machining
Sawing: Rau cov saw saw, carbide-tipped hniav muab cov txiaj ntsig zoo tshaj plaws.Ib tug 12-14 "txoj kab uas hla yuav tsum muaj kwv yees li 24 cov hniav.Pub ceev tuaj yeem nyob ntawm 10 mus rau 40 ko taw ib feeb.Rau band sawing ib tug hniav nrog peb cov hniav ib nti, raker teeb thiab zoo rake Angel raug pom zoo.Pub ceev yog li ntawm 10 mus rau 40 ko taw ib feeb.
Tig: Siv cov cuab yeej siv high-speed steel nrog 10 "pem hauv ntej thiab sab clearance thiab 15-30" rake.Tsawg txiav ceev ntawm 600 thiab 1,000 ko taw ib feeb yog xav tau.Txawm li cas los xij, feem ntau yuav tsum tau khiav ntawm qhov siab dua rpm kom cov chips ntshiab ntawm lub tshuab.Kev txiav cov kua dej yuav tsum tsis yog qhov tsim nyog, tab sis lub moj tej tawg ntawm compressed cua tej zaum yuav pab tshem tawm nti.Thaum sim ua kom tiav qhov ua siab ntev los yog ib feem ntawm cov phab ntsa nyias nyias hauv UHMW-PE, tshuab hla.Tshem tawm feem ntau ntawm cov khoom nyob rau hauv thawj qhov chaw, ces cia cov khoom zaum thiab so thaum hmo ntuj.
Milling: Cutters tsim rau machining txhuas muab cov txiaj ntsig zoo tshaj plaws.Txiav ceev ntawm 600 mus rau 1,800 ko taw ib feeb yog pom zoo, nrog tus nqi noj ntawm kwv yees li 0.01 ntiv tes rau ib lub kiv puag ncig.Router cov khoom ua haujlwm zoo rau slotting thiab lub teeb milling.
Planing: Ntoo planers tau yooj yim txo cov thickness thiab muaj tseeb-up nto ntawm UHMW-PE.Lub tshuab nruj nrog cov hniav ntse yuav muab cov khoom tshem tawm zoo heev thiab ua kom tiav qhov zoo.Txhawm rau txo qhov muaj peev xwm ua kom tsis muaj zog thaum ua haujlwm UHMW-PE, dav hlau ib nrab ntawm qhov xav tau tuab ntawm txhua sab ntawm daim ntawv.
Drilling: Cov cuab yeej siv siab ceev yog tsim nyog rau feem ntau cov ntawv thov drilling.Rau qhov ua tau zoo tshaj plaws, siv tshwj xeeb qis helix xyaum nrog polished flutes.Drilling pilot qhov ua ntej drilling lub qhov loj yog tsis pom zoo rau UHMW-PE, vim nws cov khoom ua rau lub laum mus lob thiab rub nws tus kheej mus rau hauv cov khoom.
Sib tsoo / Sanding: Vim yog UHMW-PE cov khoom tiv thaiv kev puas tsuaj, kev sib tsoo thiab xuab zeb feem ntau tsis zoo.Qhov tseeb, kev sib tsoo tuaj yeem ua rau cov khoom tawg thiab smear, ua rau lub log sib tsoo.
UHMW-PE hloov nrog cov khoom siv ntxiv xws li iav lossis hlau oxides yuav ua rau lub neej luv dua.Txawm hais tias cov cuab yeej carbide yuav ntxiv lub neej rau lub cuab yeej, nws yuav tsum muaj kev nrawm dua thiab txau.Qee cov ntaub ntawv uas muaj feem pua ntawm abrasive additives yog qhov tsis zoo rau kev ua haujlwm los ntawm txhua txoj kev.
Tsim thiab Vuam
UHMW-PE tuaj yeem ua tau kub-tsim ntawm txoj haujlwm kom yooj yim khoov thiab lub kaum ntse ntse uas yooj yim rau kev teeb tsa.Txawm hais tias txoj kev twg yog xaiv - taws teeb, hluav taws xob rhaub, qhov cub lossis da dej - yuav tsum tau siv ceev faj thiab txhua qhov kev siv zog ua kom tsis txhob overheat cov khoom.UHMW-PE, zoo li txhua yam yas, yuav hlawv hauv qhov xwm txheej tsis raug.Tsis tas li ntawd, lub voj voog ua kom txias yuav ntev dua li lub voj voog cua sov vim qhov kub ceev ceev ntawm UHMW-PE.Kev txias txias yuav tsum tsis txhob tshwm sim ntawm cov pob zeb lossis hlau vim tias cov txheej txheem yuav nrawm dhau thiab tuaj yeem ua kom muaj kev ntxhov siab ntxiv rau hauv cov khoom.Ib qho kev pom zoo ntxiv yog los npog cov khoom siv nrog ib daim pam rwb thaiv tsev ua los ntawm cov khoom siv xws li fiberglass.
Cold-forming UHMW-PE feem ntau yog siv thaum muaj qhov xav tau kom haum cov nkhaus thiab cov ces kaum.Txawm hais tias siv lub nres xovxwm, dov, xuas tes ua los yog siv bolts los kos thiab tsim cov khoom nyob rau hauv qhov chaw, lub kaum sab xis thiab nkhaus yuav tsum dhau-khoov los ntawm ntau npaum li 75 mus rau 100 feem pua los them rau cov nyhuv springback ntawm UHMW-PE.Lub peev xwm rau kev ntxhov siab tawg tuaj yeem raug txo los ntawm kev siv cov ntawv 3/8 "los yog thinner thaum txias-forming.
Kev sib txhuam los yog kev sib txhuam vuam tuaj yeem ua tiav siv cov txheej txheem tshuab tshuab dhos muaj peev xwm ntawm 550 txog 560 rpm nrog lub peev xwm los nres tig lub nres tam sim ntawd, thiab cov hlau thaub qab phaj ntawm ¼ "steel, nrog ib txoj kab uas hla ntawm me ntsis tsawg dua lub flange. OD.Cov vuam zoo li no xav tau 48 teev ntawm tag nrho crystallize ua ntej cov yeeb nkab tuaj yeem muab tso rau hauv kev pabcuam.
Butt, los yog kub phaj wilding los koom nrog cov ntawv tiaj tus mus rau hauv cov ntawv ntev lossis coils, yuav tsum tau siv cov cuab yeej cua sov hlau, coated nrog tus neeg sawv cev uas tsis yog-stick, muaj peev xwm ncav cuag qhov tsim nyog kub kom coj cov polymer mus rau lub xeev molten.Cov txheej txheem no yuav tsum tau siv cov cuab yeej tshwj xeeb wilding kom ua tiav cov welds nrog lub zog ntawm 85 thiab 100 feem pua ntawm cov khoom qub.
Adhesives
Qhov qis coefficient ntawm kev sib txhuam, tsis muaj qhov ntxeem tau ntawm UHMW-PE ua rau nws nyuaj rau cov nplaum rau nkag mus rau hauv cov polymer thiab tsim ib daim ntawv cog lus.Tham nrog koj tus neeg muab khoom nplaum rau cov txheej txheem pom zoo rau daim ntawv cog lus UHMW-PE rau ntau lub substrates, txawm hais tias cov tshuab fasteners raug pom zoo rau feem ntau cov ntawv thov.
Post lub sij hawm: Jan-24-2018