24-20 CERCETǍRI PRIVIND OBŢINEREA PIESELOR INJECTATE DIN PULBERE DE FIER


RESEARCH FOR OBTAINING OF IRON POWDER
INJECTED PARTS
Complex shape parts of small size and made in mass production may
be economically produced by metallic or ceramic powder injection. This modern
technology considers using a multi-component binder added to a small grain
size powder (less than 40 μm). During spraying iron powder process results a
small grain size fraction, which can be used in obtaining of injected parts. There
are presented the results of our research for obtaining of parts by injection
moulding technology in present paper. Present results are referring to used
binder properties, injection conditions, resulting shrinkage after injection and
de-binding, as well as the causes of defects may appear in injected parts. It is
noticed that, in addition to the binder characteristics, the knowledge of injection
process parameters and the de-binding conditions are very important in the
injection moulding technology design in order to obtain parts without defects.
Cuvinte cheie: formarea prin injecţie, deliere, metalurgia pulberilor
Keywords: injection training, debinding, powder metallurgy

20 CERCETǍRI PRIVIND OBŢINEREA PIESELOR INJECTATE DIN PULBERE DE FIER