Apparatus for plasticizing thermoplastic synthetic resin

Claim 1

A rotary type plasticizing apparatus comprising an axially extending hollow rotatable body having its axis of rotation arranged horizontally and having a substantially frustoconically shaped inner peripheral wall surface which increases in diameter in the axial direction from a small diameter inner peripheral wall portion at one end to a large diameter inner peripheral wall portion at the opposite end so that the lOwer portion of said body slopes downwardly from its small diameter and to its large diameter end, means for rotating said body, a heating device for heating the contents of said hollow rotatable body, a cone shaped member coaxially positioned within said body and having its outer peripheral surfaces arranged in spaced relationship to said inner peripheral wall portion of said body and forming an annular passage between the inner peripheral wall of said body and the outer peripheral surface of said cone shaped member with the annular passage having its radial dimension decreasing in the axial direction from the small diameter end to the large diameter end of said body, connecting pieces extending between and secured to said body and cone shaped member so that said cone shaped member rotates with said body, means for feeding solid resin material into the small diameter end of said body onto the inner peripheral wall at the small diameter end thereof so that as the solid resin material is introduced into said body, it is heated and plasticized and exposed to the rotational action of said body and cone shaped member and due to the centrifugal force developed by the rotational action it is pressed against said inner peripheral wall and propelled in the axial direction of said body toward said large diameter end thereof, said body arranged to prevent the accumulation of the resin material in the vicinity of the small diameter end of said inner peripheral wall and said annular space between said body and said cone shaped member forming a vent for the removal of vapor products of the plasticization of the solid resin material from said rotatable body, a fixedly supported discharge member mounted at one end on the large diameter end of said body and extending axially outwardly therefrom and converging inwardly to an outlet opening located approximately on the extension of the axis of said body, a rotatable sealing mechanism positioned between the end of said body and the corresponding end of said discharge member, the end of said cone shaped member located adjacent the end of the large diameter end of said body combining with the inner surface of said discharge member and forming an outlet passage communicating between the annular passage between said cone shaped member and said body and the outlet opening in said discharge member for providing an angular change in the direction of movement of the plasticized resin as it leaves said body and passes into said discharge member.