Screw thiab chav rau PA66 Thermal Break Strips

Qhov extruder screw thiab barrel tsim qhov siab tshaj plaws ntawm kev siv extrusion, cov ntaub ntawv tseem ceeb uas hlo pluv tiam rau plastic los ntawm zis mus rau qhov chaw ua kom sov nyob rau hauv qhov chaw kho. Qhov ob no yog ib qhov kev lag luam zoo uas muaj kev txhim kho thiab metallurgy tseem ceeb heev. Qhov screw yog ib qhov txheej txheem uas muaj ib qhov helical flight uas ua haujlwm tshuab, ua kom sov, sib pib, thiab ntxuav polymer. Nws qhov chaw—xws li flight pitch, channel depth, thiab compression ratio—yog ib qhov kev txhim kho zoo rau qhov khoom tshuaj xwb. Piv txwv li, ib qhov screw rau PA66 yuav tsum muaj kev txhim kho uas pom zoo nws qhov melting point thiab sif zis, feem ntau muaj qhov transition zone ntev dua. Qhov barrel yog ib qhov chaw nres tseg uas nres qhov screw, muaj ntau qhov chaw sib sau thiab qhov cooling channels rau kev daws teeb meem thermal zoo. Thaum kawg rau qhov ntau zog, cov duab ntawv abrasive, thiab feem ntau cov duab ntawv corrosive polymer additives, ob qhov ntaub ntawv no yog tsim los ntawm alloys uas muaj zog thiab tsis tu ncua. Cov ntaub standard yog nitrided rau kev tu ncua zoo, tab sis rau cov khoom abrasive tshaj plaws xws li glass-filled nylons, bimetallic barrels uas muaj alloy liners (xws li Xaloy) thiab screws uas muaj hardened flight tips loss specialized coatings (xws li Stellite) yog tseem ceeb rau kev nyob dav. Qhov kev sib txig ntawm qhov screw flight thiab qhov barrel wall yog ib qhov tolerance tseem ceeb; qhov kev sib txig loj dhau yuav cuam tshuam rau kev tsis kam thiab qhov sov tsis zoo, thaum qhov kev sib txig tsis txaus yuav cuam tshuam rau kev nyiag siab. Qhov kev ua haujlwm, kev ntuag, thiab kev siv zog ntawm qhov extruder tag nrho yog txiav txim los ntawm qhov kev nyob thiab kev txhim kho ntawm qhov screw thiab barrel, ua rau lawv yog cov ntaub ntawv wear tseem ceeb tshaj plaws thiab qhov tseem ceeb tshaj plaws ntawm kev pab kho kev kawm hauv extrusion.