Patent ID: 8043549
Filing Date: 2011-10-25
Classification: B29C

Abstract:
1. An injection method of an injection apparatus comprising: a heating cylinder; a screw rotatably disposed within the heating cylinder and including a flight on an outer circumferential surface thereof; and a drive apparatus disposed at a rear end of the screw, the screw including a plasticizing portion which includes a body portion and the flight projectingly formed on an outer circumferential surface of the body portion; and an index ε, which is obtained by dividing a value obtained by adding a screw stroke S of the screw and a screw effective length L representing a distance between a rear end of a molding material supply port formed on the heating cylinder and a front of the screw as measured when the screw is located at an advance limit position, together by the screw stroke S, satisfying the following relation: wherein a molding material is supplied into the heating cylinder in a manner that the molding material does not stack on one another in the heating cylinder.