Injection moulding of micro-parts: applications to micro-gears

摘要

The paper is concerned with the development of the injection molding process for micro-parts with an application to injection moulding of micro-gears with the volume less than 0.2 mm3. First the paper describes the equipment that is used consisting in a micro-injection equipment that that is used consisting in a micro-injection that permits simultaneously bi-polymer injection. A polypropylene polymer is then used and characterized. The mould cavity corresponding to a micro-gear and related equipment is related. Finally the micro-injections are realized and the geometry of the micro-gears is reported in using an optical measurement system.