Microwave Drying Furnace Drying the complex shaped molds in short time

摘要

In molding of investment casting mold, in general, wax model tree is coated with slurry containing the refractory zircon flower, followed by high alumina sanding with the particle size of 0.3-0.7mm (approx. 0.01"-0.03") for primary and second layer, and 0.7-1.5 mm (approx. 0.03"-0.06") for third and the following layers. After the slurry coating and sanding, the tree is dried over 2-6 hours per layer in a drying chamber where temperature and humidity are kept in constant condition. This process is repeated about 6-8 times. In this case, a complicated shape with cylindrical or holes take much longer drying time compared with the other ordinary shapes.