Manufacturing method of molding material by microwaves irradiation

Abstract

Abstract PURPOSE: To eliminate cracks and to efficiently mold into a desired shape by irradiating microwaves on boardlike material holding moisture. CONSTITUTION: After mixing thermoplastic resin with small pieces of wood such as pulp, wood fibre and the like that, these are formed into beardlike material by a dry method or a wet method. Next said boardlike material is given moisture and put in a microwaves irradiation furnace in a wet state to be irradiated with microwaves for raising its temperature above the fixed temperature. There both of the combined water and free water produce heat caused by dielectric loss, the steam within the boardlike material rised to raise the internal temperature in a short time. Next, said material is inserted between the mold material of a molder to be shaped into a desired form and said molded material is dried to an appropriate moisture rate by the appropriate means such as microwaves irradiation or the conduction heat of a heat plate of a hot blast hot press and the like and then the inside thermal plastic synthetic resin is solidified by cooling. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Kyo Norimoto
• 👤 Kaneyoshi Ito

Bibliographic Details