A demolding method and equipment to reduce dents produced in an as-cast product. The method includes the steps of placing a tight-flask cope on a tight-flask drag for mating, such that a gate for the tight-flask cope and drag faces upward; reversing the tight-flask cope and drag after they are poured with molten metal such that the gate faces downward; and drawing a cope, a drag, and an as-cast product from the reversed tight-flask cope and drag, with the gate facing downward, from above to below.