METHOD AND APPARATUS OF MANUFACTURING MOLDING MATERIAL, AND METHOD OF MANUFACTURING RESIN GEAR

摘要

Provided herein is an apparatus of manufacturing a molding material for use in a method of manufacturing a molding material that can prevent a crack from occurring in the molding material. A cylindrical die (3) is slid downward along an upper hollow compression mold (4) and a lower hollow compression mold (2) with a molding material (35) held between the upper hollow compression mold (4) and the lower hollow compression mold (2). After that, the upper hollow compression mold (4) is moved upward to relatively move the upper hollow compression mold (4) and the lower hollow compression mold (2) away from each other. After a slurry diffusion member (7) is removed, the molding material (35) is taken out.

主权项

1. A method of manufacturing a molding material, comprising the steps of:
preparing a mold device including:
a molding die including at least a cylindrical die having an opening portion opened in an upward direction, and a lower compression mold and an upper compression mold, both of which are disposed inside the cylindrical die during molding; preparing slurry by dispersing short fibers and a powdery resin in a dispersion medium; pouring the slurry into the cylindrical die with the upper compression mold placed at a stand-by position; discharging the dispersion medium from the molding die to aggregate the short fibers and the powdery resin in the molding die to form an aggregate; compressing the aggregate by relatively moving the upper compression mold and the lower compression mold closer to each other inside the cylindrical die to form a molding material, during or after the step of discharging; and taking out the molding material from the molding die, wherein the cylindrical die is slid along the upper compression mold and the lower compression mold with the molding material held between the upper and lower compression molds and then the upper and lower compression molds are relatively moved away from each other to take out the molding material.