Injeksen molding masin skru em i wanpela bikpela samting bilong masin, we ol i save yusim long karim, pasim, meltim, na putim presa long ol plastik raw materiel. Struksa na pefomens bilong en i save afektim stret wok bilong wokim plastik na kwaliti bilong prodak.
Bodi bilong skru i gat wanpela hap bilong givim kaikai, wanpela hap bilong presim, na wanpela hap bilong mekim ol samting i wankain. Seksen bilong givim kaikai em i wok bilong hatim na karim ol strongpela 'raw materials'; hap bilong kompresen i save mekim wok bilong meltim, miksim, na rausim win; na 'homogenization' seksen i mekim na 'melt temperature' na 'flow stability' i wankain. Long lukluk long ol samting bilong plastik, ol i ken brukim ol skru i go long tripela kain: 'gradient' (i gutpela long ol samting we i save pilim hat olsem PVC), 'abrupt' (i gutpela long ol 'polyolefins'), na 'general-purpose type. Bikpela samting i narapela em longpela na strong bilong 'shear' disain bilong 'compression section'. Ol bikpela samting em 'diameter', 'aspect ratio', na 'compression ratio', we ol i mas wankain olsem ol samting bilong en long mekim ol samting i kamap gutpela moa. Ol samting we ol i save yusim em ol samting we i gat bikpela hat na i no inap bagarap olsem 38CrMoAla aloi na tungsten carbide nikel-bes aloi. Taim yu yusim, yu mas mekim wanpela 'standardized preheating' proses na klinim na lukautim oltaim long stopim skru long slip o bagarap long masin.
