Investment casting is also called lost-wax casting. The castings fabricated by this technique have high dimensional accuracy and polished surface, which reduces the machining work. It can also cast complex castings of various alloys, especially high temperature alloy castings, which can ensure the consistency of castings and avoid residual cutting marks caused by machining, so it is suitable for mass production. However, the production cycle is long, need to at least 45-60 days to cast a model. Besides, due to the limitation of the production process, it is impossible to produce thin-walled, special-shaped and complex models.
Under the background of the long production cycle and high cost of die sinking, a large number of professional casting factories are only willing to accept bulk orders and the type of finished products is single. For those who have the demand for small-batch casting, they have difficulty in finding a factory for a corporation because of the high cost, pushing enterprises that need R & D in a disadvantageous position.