| 摘要 |
A plasticating screw for a machine for processing thermoplastic resins in the field of extrusion and molding, characterized in that the profile of the threads is adapted to balance and center the screw in the cylinder and to separate the particles that have started to melt due to the heated cylinder and to impart two speeds, a very high one to the melted material, and to slow the cores of the granules that are still solid. The threads, with the aid of the change of bottom and angle, alternately reduce and increase the diameter, imparting to the solid granules a considerable compression which, combined with the rotation, upon contact generates friction, which facilitates melting and also optimum mixing due to the different speeds. <IMAGE> |
