IMPACT OF INTRODUCTION OF REINFORCING ADDITIONS TO QUARTZ SANDS ON PHYSICAL AND MECHANICAL PROPERTIES OF FOUNDRY MIXTURES BY THE METHOD “NO BAKE” (PART 2)
- 1 Laempe EAST Co, Ruse, Bulgaria
- 2 Kaolin AD, Senovo, Bulgaria
- 3 Technical University, Sofia. Bulgaria
Contemporary production of castings is inevitably associated with improvement of foundry mixtures, and in particular with quartz sands as a basic moulding material. The interest is motivated by opportunity of reaching mixture’s appropriate parameters at different combinations between sands and binding compositions. One option of particular importance in obtaining mixtures’ physical and mechanical, and technological properties is to get a greater number of contact points among individual grains of quartz sands.
The report examines the impact of dispersive mineral particles for increasing contact points of interaction between individual sand particles in the process of solidification. A theoretical basis for the possibility of applying such reinforcement in the preparation of mixtures is presented. An attempt for optimization has been done by some criteria – porosity, morphology, gas permeability and other properties.
Results and conclusions from the conducted tests have been graphically presented.