To surely separate a product from a mold, and collect the product by applying the oscillation suitable for the shake-out to the mold after the casting to collect the mold, and applying the oscillation to separate the product from a runner part to collect the product.

The oscillation suitable for the shake-out is applied to a ceramic mold 1 after casting to separate the mold 1. Then, the oscillation to separate a product 11 from a runner part 9 is applied to separate the product 11 from the runner part 9. An air hammer, etc., is used as an oscillating means. The mold is first separated, and the product 11 is separated with the time lag thereafter, and even when the product 11 is a non-magnetic casting, the cast product 11 can surely be separated from the mold 1 and collected. In addition, the product 11 cast in the lost wax casting where the ceramic mold 1 is mainly used can be easily separated from the mold 1 by the strength in the oscillation.