CASSETTE TAPE STORING CASE AND ITS FORMING DIE DEVICE

摘要

PROBLEM TO BE SOLVED: To cause resin to well flow into a third surface forming a pocket part when a cassette tape storing case is molded with resin and prevent defective molding of it. SOLUTION: A gate 43 for use in pouring resin into a cavity 33 in a molding die is positioned at an opposite side of a third surface 13 at a first surface 11 of a storing case 6. A radius of curvature R2 of a corner part 56 of a slide core 36 forming an inside part of a bent segment between a second surface part 12 and the third surface 13 is set to 0.4 to 0.9 mm which does not cause any trouble in storing the cassette tape 1.