brown compact section 6 and leading to a contact pressure between the two brown compact sections 5 6 along the contact surfaces 10 11 is indicated in fig4 by arrows f the result of the sintering process is that an engine part of geometrically complicated structure produced by metal injection molding is provided the contact surfaces 10 11 provided adjacent to the projections or recesses 7 8 are designed substantially parallel in one embodiment which includes their forming curved surfaces in the same manner this ensures large surface and intensive pressing during sintering fig5 shows an exemplary embodiment in which three brown compact sections 5 a 5 b and 12 are connected to one another in a sintering process the one brown compact section 12 is here designed in the form of an insert that has two circular or club shaped projections 12 a 12 b which are arranged in corresponding recesses 8 a 8 b of the brown compact sections 5 a 5 b the insert 12 acts as the connecting part for connecting the two brown compact sections 5 a 5 b in a sintering process it is provided here that the insert 12 when compared with the brown compact sections 5 a 5 b undergoes a higher or a lower shrinkage during the sintering process this can be achieved on the one hand in that the insert 12 has differing shrinkage properties due to a different material selection for example type and or size of the metal powder.