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Temperature measurements of polymer melts in the heating barrel during injection molding. Part 2: Three‐dimensional temperature distribution in the reservoir
Author(s) -
Amano O.,
Utsugi S.
Publication year - 1989
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760290304
Subject(s) - thermocouple , nozzle , materials science , barrel (horology) , molding (decorative) , polymer , composite material , thermal , mechanics , mechanical engineering , thermodynamics , engineering , physics
A new method has been developed to measure the three‐dimensional temperature distribution of polymer melts in the reservoir of the heating barrel in the dynamic state. The procedure involves the use of a small‐sheathed thermocouple in the nozzle of the machine. The tip of the thermocouple can be varied in depth from the surface to the center of the nozzle. The polymer melt of a shot is found to have a three‐dimensional temperature distribution dependent on the geometry of the screw and the order of shot. These results reflect clearly the thermal histories of the polymer melt in the channel of the screw during plastication and conveyance, and indicate part of the dynamics of injection molding. Further, these measurements contribute to optimization of the design for the screw and the process conditions.