injektiöyksikkö

Injektiöyksikkö refers to an injection unit, a component commonly found in injection molding machines. Its primary function is to melt and inject plastic material into a mold cavity. The unit consists of a barrel, a screw, and a heating system. Plastic pellets are fed into the barrel, where the rotating screw conveys them towards the nozzle. The heating system, typically electric bands, melts the plastic as it moves through the barrel, transforming it into a molten state. The screw then acts as a plunger, building up pressure and forcing the molten plastic through the nozzle and into the open mold. Once the mold is filled, the screw stops rotating and holds pressure, allowing the plastic to cool and solidify. The injection unit is a critical part of the injection molding process, determining the speed, pressure, and temperature of the plastic melt, which directly impacts the quality and characteristics of the final molded product. Different types of injection units exist, varying in screw design, heating capacity, and injection stroke, to accommodate a wide range of plastic materials and production requirements.