초록 ▼

The problem of insufficient friction along the wall of a rotating funnel feeding viscous material to an extruder or injection molding machine so that the material sweeps past the conveying screw and prevents the conveying screw from continuously feeding that mass to the outlet of the funnel, is solv

The problem of insufficient friction along the wall of a rotating funnel feeding viscous material to an extruder or injection molding machine so that the material sweeps past the conveying screw and prevents the conveying screw from continuously feeding that mass to the outlet of the funnel, is solved by providing pins which project inwardly from the rotating funnel wall and engage in interruptions in the flight of the conveying screw. The funnel wall can also be provided with pockets or grooves.

대표청구항 ▼

A feeder for a shaping machine for a viscous plastic mass, said shaping machine having a chamber receiving said mass, said feeder comprising: a frustoconical filling funnel rotatable about an axis and having a wide mouth at one end and a narrow outlet at an opposite end communicating with said chamb

A feeder for a shaping machine for a viscous plastic mass, said shaping machine having a chamber receiving said mass, said feeder comprising: a frustoconical filling funnel rotatable about an axis and having a wide mouth at one end and a narrow outlet at an opposite end communicating with said chamber; a rotatable conveyor screw extending along an inner wall of said funnel parallel to a generatrix thereof and formed with a screw flight for displacing said viscous plastic mass toward said outlet; and a plurality of inwardly projecting pins on said inner wall forming discontinuities in rectilinear paths therealong between said mouth and said outlet and in a region of said flight, said screw being provided with an interruption in said flight to clear said pins upon rotation of said pins with said funnel past said screw.