Taking the new non-pneumatic tire UPTIS as the research object

the Solidworks is used to establish the geometrical model

and the tire injection molding process is simulated and analyzed by Moldflow. Polyurethane (PU) was selected as the UPTIS material. And the PU material was measured by capillary rheological tester

DSC

DMTA

universal tensile equipment. The Cross-WLF equation was used as the rheological constitutive equation

and the parameters were obtained by fitting procedure according to the rheological curves. The influence of gate position and quantity on filling time

front flow temperature difference

warpage deformation were studied. The influence of melt temperature

mold temperature

pressure holding pressure and time holding pressure on molding process was studied by the orthogonal test method

and the molding process parameters were optimized.