MANUFACTURE OF INJECTION MOLDING PHENOL RESIN MOLDING MATERIAL

PURPOSE:To reduce the dispersion of fluidity of a molding material and to make possible high grade of continuous molding by a method wherein in proportion to the bulk density after a primary mixture the stirring and mixig time in a secondary mixture and granulation is elongated. CONSTITUTION:An auxiliary consisting of glass fibers, colorant, hardening agent, mold releasing agent is thrown into a high speed stirring mixer and stirred until the glass fibers are defined amply. Then, phenol resin varnish is put in and stirred for the primary mixture. After the primary stirring the material is taken out and unnecessary water and volatile matters of low boiling temperature are removed. Then, the molding material is put again into the high speed stirring mixer to perform a secondary mixture and granulation. After the secondary mixture and granulation the molding material is taken out and adjusted to the desired fluidity by a hot air drier.