Lub npe "extruder moulding" tsis yog sijhawm kev tshuaj sib thooj nyob rau hauv qhov chaw tsim kho mob, thiab feem ntau yog qhov sib txawv ntawm ob qho kev tsim khoom sib txawv: extrusion thiab injection moulding. Yog xav kom meej, ces yeej tseem ceeb los sib txawv lawv. Extrusion yog qhov kev tsim khoom uas ua tau ntau dua, siv los tsim cov khoom ntev, zoo ib yam li roj teeb, profiles, thiab sheets. Nyob rau hauv kev tsim extrusion, khoom siv tau ntau thiab tsha tseg mus rau hauv qhov chaw (die) kom tsim qhov chaw ntsug sib txawv. Injection Moulding, nyob sab laj, yog qhov kev tsim khoom cyclical uas kheej ib qhov ntau ntawm plastic uas raug ntxuav tso rau hauv qhov chaw ntxuav txaus tshuaj ntxuav txaus tshuaj kom tsim cov khoom sib txawv, muaj peb miz. Cov cuab yeej, kev daws teeb meem, thiab cov khoom tiav rau ob qho no yooj yim sib txawv. Txawm li cas los xij, nyob rau hauv kev saba lus taj yam, yog tseem ceeb los siv cov npe tswv yim. Yog tias lub xwm yeem muaj kev tsim khoom ntev, tseem ceeb, lub npe tswv yim yog "extrusion." Yog tias nws muaj kev tsim khoom ib leeg, tseem ceeb ib yam li housings lossis containers, lub npe tswv yim yog "injection moulding." Siv cov lus tswv yim raug tuaj yeem tiv thaiv kev tsis txawj, thiab pab tau zoo rau kev sib pab ua haujlwm nyob rau hauv kev tsim kho thiab kev tshuaj xyuas.