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采用二次微波硬化水玻璃砂加热工艺,研究了微波加热水玻璃砂的性能变化,对比分析了二次微波加热水玻璃砂与一次微波加热水玻璃砂的强度变化趋势,测试了二次微波加热水玻璃砂的性能特征.试验研究结果表明:采用二次微波加热水玻璃砂工艺方法,加热时间短、硬化速度快、模具受热时间短,可采用普通木模和塑料模,显著降低了微波加热水玻璃砂对模具材料的要求;微波加热硬化水玻璃砂的性能受水玻璃加入量、加热功率与时间、环境湿度等因素影响;微波加热硬化水玻璃砂具有强吸湿性,提高微波加热硬化水玻璃砂的抗吸湿性是该工艺实际应用的关键.
The effect of microwave heating on sodium silicate sand was studied by using the second microwave hardened sodium silicate sand heating process. The strength change trend of sodium silicate sand heated by microwave and microwave heating sodium silicate sand was compared and analyzed. The effects of secondary microwave heating Sodium silicate sand.The experimental results show that: the use of secondary microwave heating sodium silicate sand process, heating time is short, fast curing, mold heating time is short, can be used ordinary wood and plastic mold, significantly reducing the microwave heating Sodium silicate sand mold material requirements; microwave heating hardened sodium silicate performance by the amount of water glass, heating power and time, environmental humidity and other factors; microwave heating hardened sodium silicate sand has a strong hygroscopicity, increase the microwave to heat the hardened water Anti-hygroscopic glass sand is the key to the practical application of the process.