IN-LINE SCREW TYPE PLASTICIZING INJECTION EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To prevent breakage of continuous glass fibers and to produce stably and efficiently a large-sized injection molded article such as an automobile component which is constituted of a continuous glass fiber PP resin. SOLUTION: The ratio of the length (L)/diameter (D) of a screw is made 18-24 and the length Lf of a supply part of the screw is made 10-14D. The groove depth hf of the supply part of the screw (14) is made 13 mm or above, while the groove depth hm of a metering part of the screw (14) is made 8 mm or above, and the width in the direction vertical to the direction of flow of a molten resin in a molten resin passage formed of a wear plate (22) and a check ring (26) is made 3-6% of the diameter (D) of the screw. COPYRIGHT: (C)2005,JPO&NCIPI