USE OF RUBBER MOLDS FOR DUPLICATION AND MAKING METAL CASTINGS IN RENOVATIONS

The article describes using of the rubber molds for experimental, low-series of metal castings as well as duplication of damaged mechanical parts. The model can be made or obtained by several methods. The experimental wax pattern was made of the original machine part by application of rubber on the original surface. For experiment was tested powdered aluminium into the rubber. Of rubber was made two-piece mold. On the wax pattern was monitored the accuracy of most important surface (combustion chamber). Dimensional accuracy by measurements was evaluated as very well. The castings were poured of AlSi7Mg0.3 alloy. Dimensional inspection of cast tested machine part showed that silicone rubber molding was a suitable approach for production of this part.