After more than half a century of vigorous promotion and rapid development, lost foam casting technology has gradually entered a mature stage. Its products have developed from simple castings to castings with complex shapes, from non processed castings to fully processed castings. There are more and more kinds of materials, with the quality ranging from tens of grams to tens of tons. One of the characteristics of lost foam casting process is collective operation and teamwork. The birth of a qualified blank must go through several processes and the tacit cooperation of several workers. Therefore, the casting blank defects are accumulated, enlarged and extended step by step in the whole process, and finally lead to the scrap of the casting blank. To fundamentally solve the problem of scrap of casting blanks, first of all, carefully analyze the causes of Flywheel Casting deformation, slag inclusion and iron clad sand defects, and gradually improve and optimize the production process and production process through process test, so as to make the production process and production process more reasonable and scientific, and take the scientific and reasonable process as the implementation standard, strictly implement, carefully control and supervise, In order to ensure the stability of product quality and high product qualification rate.
(1) It is feasible to produce flywheel by lost foam casting process.
(2) By optimizing the gating system and production practice, it is proved that the lost foam casting process for fully machined castings is feasible. Through the recent process test, the qualified rate of the blank has reached more than 85%.
Lost foam casting is a new type of casting method, which is formed by bonding the foam model similar to the size and shape of the casting into a model cluster, brushing the refractory coating and drying it and then embedding it in the dry sand for vibration modeling. Under the normal pressure or negative pressure, the model is vaporized, the liquid metal occupies the model position, and the casting is formed after solidification and cooling.