Method for Producing a Sintered Body

Abstract

This invention relates to a method for forming a three dimensional sintered body comprising the steps of a) providing a basic mould having a configuration adapted to the sintered body that is to be produced, b) treating the surface of the basic mould to facilitate application of a first surface layer of the sintered body, c) applying powder particles onto the basic mould, to form said first surface layer, d) applying at least one more layer on top of said first surface layer, e) heat treating the basic mould and the particles to form a sintered body, wherein step b) is performed by providing an adhering layer to the basic mould arranged to adhere the particles of at least a portion of the surface layer.

1 - 13 . (canceled) 
     
     
         14 . A method for forming a sintered body comprising the steps of:
 applying to a surface of a mould an adhering layer to facilitate application of a first layer of particles, the mould having a configuration adapted to the sintered body that is to be produced;   applying the first layer of particles onto the adhering layer on the surface of the mould, wherein at least a portion of the adhering layer melts from heat supplied by the particles when they are applied to the mould;   applying a second layer of particles on top of the first layer of particles; and   sintering the particles of the first layer and the second layer on the mould to form the sintered body.   
     
     
         15 . The method of  claim 14 , wherein the adhering layer is applied as a liquid and freezes after being applied to the surface of the mould. 
     
     
         16 . The method of  claim 14 , wherein the portion of the adhering layer that melts from heat supplied by the particles freezes again before the sintering step. 
     
     
         17 . The method of  claim 14 , wherein the particles of the first layer are adhered by means of freezing of the adhering layer. 
     
     
         18 . The method of  claim 14 , further comprising the step of treating the mould to obtain a temperature of the mould between 0° C. and −100° C. before applying the adhering layer. 
     
     
         19 . The method of  claim 14 , further comprising the step of treating the mould to obtain a temperature of the mould between −10° C. and −30° C. before applying the adhering layer. 
     
     
         20 . The method of  claim 14 , wherein the step of applying the first layer of particles is performed in a room having a temperature between 10° C. and 60° C. 
     
     
         21 . The method of  claim 14 , further comprising the step of treating the mould to obtain a temperature of the mould between 0° C. and −100° C. after applying the first layer of particles and before applying the second layer of particles. 
     
     
         22 . The method of  claim 14 , further comprising the step of applying a second adhering layer after applying the first layer of particles and before applying the second layer of particles. 
     
     
         23 . The method of  claim 14 , wherein the particles of the first layer have a different size than the particles in the second layer.