Single Screw Extruder rau PA66 Thermal Break Strips | Siv Txoj Kev Ntau

Lub npe "single screw" nyog kev tsav zhm polymer yog qhov chaw ntxiv tshwm sim hauv lub "single screw extruder", ib qhov khoom siv uas muaj qhov ceev tshaj plaws rau lub tshuab. Ntawm qhov tsis yog ib qhov txwv twg meej, nws yog ib qhov khoom tsim los ua ntau yam: sau khoom ntawv, plasticating (hlawv), sib plooj, ntsuas, thiab pumping. Lub screw feem ntau muaj peb qhov sib txawv: qhov feed section, uas tau sau khoom ntawv polymer; qhov compression loss transition section, uas qhov siab hla kom sov dua thiab pab hlauv; thiab qhov metering section, uas muaj qhov siab zoo ib yam thiab tsim kom muaj qhov siab tshwj xeej rau kev extrusion los ntawm die. Lub compression ratio—qhov ratio ntawm qhov ntev hauv feed section thiab metering section—yog ib qhov tswj plaws rau kev tsim kho raws li qhov polymer. Lub screw tsim los ntawm cov hlwb zoo tshaj plaws thiab tsis tu ncua, thiab feem ntau muaj coating los ntawm nitriding loss cov hlwb siv xws li tungsten carbide kom tso tseg kev tu ncua. Cov ntxig tshiab ntawm lub screw tsim kho siv ntau yam kev pab tshwm sim. Piv txwv li, barrier screws muaj ib qhov flight thib ob uas sib tshooj polymer hlauv thiab pellet khoom tsis hlauv kom pab tshwm sim zoo dua thiab tshwm sim zoo dua. Qhov mixing section, xws li Maddock mixers loss pin mixers, tau suav nrog kom sib piv txwv zoo dua. Kev xaiv lub screw design yog qhov tseem ceeb tshaj plaws, vim nws txiav txim siab ntau yam kev tshwm sim xws li output rate, melt quality, kev siv nuj nqaij, thiab qhov kawg ntawm kev tu ncua. Nws yog qhov tseem ceeb tshaj plaws ntawm lub tshuab thiab khoom, thiab kev txhim kho nws yog qhov tseem ceeb rau kev tshwm sim zoo thiab siv ntau yam kev siv.