Method for Forming Powder Molding Product and Mold Apparatus for Powder Molding

摘要

A powder molding product may be formed by a forming portion in a mold body filled with a raw powder. Upper and lower punches are fitted into the forming portion to form the powder molding product. Prior to filling with the raw powder, aqueous solution in which water soluble lubricant having at least 3 g of solubility for 100 g of water is dissolved in water to uniform phase is applied to a mold portion. The aqueous solution is evaporated, thus forming a crystallized layer on the molding portion. The crystallized layer is formed on the peripheral surface of the molding portion for lubrication enabling the reducing of a pressure required for ejecting the powder molding product from the molding portion as well as the improving of the density of the powder molding product.