Patent ID: 6679312
Filing Date: 2004-01-20
Classification: B22D

Abstract:
An injection molding screw for metals, which is rotationally and movably provided in a heating cylinder having a nozzle at an end thereof and a feeding opening at a rear thereof, said injection molding screw configured to transfer granular metals, fed thereinside from the feeding opening of the heating cylinder, while said metals are melted and to inject melted metals, metered in a fore end of the heating cylinder, from the nozzle by forward movement of the screw, the heating cylinder and the screw positioned at an inclination with the feeding opening disposed higher than the nozzle, wherein:a screw flight is formed around a portion of the axis of the screw and a remainder section of the screw is of a diameter equal to the outer diameter of the screw flight; a rearmost end of said screw flight is positioned immediately below a rear edge of the feeding opening when said screw is at a rearmost position in the heating cylinder, wherein said granular metals are fed through the feeding opening by rotation of the screw when the rearmost end of said screw flight is at the rearmost position; and at a foremost position of the screw, the rear end of said screw flight is positioned forward of the feeding opening and the feeding opening is closed by said remainder section of the screw.