SCREW PLASTICATOR FOR POLYMER MATERIALS Russian patent published in 2008 - IPC B29C47/36 B29C45/46 

FIELD: mechanic.

SUBSTANCE: said utility invention relates to the construction of screw machines for recycling of polymer materials, in particular, rubber mixtures, using the extrusion technique, and can be used in chemical, in light and other industries. The screw plasticator for recycling of polymer materials contains plasticator cylinder with thermostatic devices and screw placed in it, with a tip provided with curved vanes. The concave side surface of the vanes has a cylindrical part with an edge parallel to the axis of the screw, limited by a section of a logarithmic spiral with a pole on the screw axis. In the screw, a freely rotating blade shaft provided with vanes is installed freely with one thrust and two radial bearings. The vanes, from the end of the screw, are directed along the edges of the material cylinder and are curved smoothly by an angle equal to two angles of slope of the screw thread for rotation in the direction opposite to it.

EFFECT: excludes swirling of polymer materials in plasticator, relatively to axis of screw, and provides stabilization of recycling material flow along axis of screw rotation.

2 dwg