DEVICE TO FACILITATE PUTTING AN ELASTIC ENVELOPE ON A PART PROJECTING FROM THE HUMAN BODY AND A METHOD OF EXPANDING THE CROSS SECTION OF THE ENVELOPE

摘要

PCT No. PCT/SE81/00172 Sec. 371 Date Feb. 5, 1982 Sec. 102(e) Date Feb. 5, 1982 PCT Filed Jun. 10, 1981 PCT Pub. No. WO81/03634 PCT Pub. Date Dec. 24, 1981.The object of the invention is a process of manufacturing a sintered compact of sinterable pulverulent material, in which the powder is moulded against a moulding surface and sintered in contact with the moulding surface and in which the pores in at least local areas of the compact are sealed by infiltration with an infiltration material which during a stage of the infiltration process is in liquid form and which by temperature decrease is caused to solidify in the pores, and the characteristic features of the invention are that the moulding takes place on the moulding surface in such a way that the moulding surface is covered with relatively fine-grained sinterable powder which by its own adhesion or by adhesion intensified by additives is caused to form an at least temporarily retained fine powder layer (3) on the moulding surface, and that at least one layer (5) of sinterable coarse powder is applied to the fine powder layer, and that both layers are sintered and infiltration is effected such that the infiltration material is caused by capillary action to be sucked from the coarse powder layer into the fine powder layer and through this layer towards the surface of the compact which is moulded by the moulding surface.