Mesomechanics of technological properties of powdered polymer compacts in lost wax casting

Production of mouldings with high dimensional and geometrical accuracy is a principal problem in foundry engineering. In actual practice this problem is solved by using lost wax casting method. However it may result in occurrence of rejects, such as lost wax shrinkage, investment pattern shape distortion and cracking of ceramic shell mold. One possibility of strain state decrease in lost wax is preparation of investment patterns by compaction of spherical particles of powdered lost wax. This enables to distribute stresses by volume of compact more uniformly and consequently to create minimal difference of densities of zones equidistant from the center of compact even at one-sided compaction. It was developed novel approach for pattern structure formation, which makes it possible to remove rejects previously named.