METHOD FOR ESTIMATING PLASTICIZED RESIN TEMPERATURE IN HEATING CYLINDER, METHOD FOR ESTIMATING RESIN TEMPERATURE IN OUTLET OF NOZZLE, AND METHOD FOR ESTIMATING INJECTION CONDITION

摘要

PROBLEM TO BE SOLVED: To provide a method for estimating a plasticized resin temperature and a resin temperature in a nozzle outlet in an injection mechanism by calculation without measuring the resin temperature in the nozzle outlet when an operation is ordinarily performed after an experiment and a test operation.;SOLUTION: This method for estimating the plasticized resin temperature in a heating cylinder comprises the following steps (1)-(5). (1) All or one of a heating cylinder temperature, a cycle time, a weighing value, a back pressure, the number of rotation of a screw set as a plasticization condition are selected, and after an unknown factor is multiplied on each of them and they are added together, an imperfect estimation equation for the plasticized resin temperature is determined. (2) Experiments with a number not less than the number of the unknown factors are done to obtain all or one data on the plasticized resin temperature at the apex in the heating cylinder, the heating cylinder temperature, the cycle time, the weighing value, the back pressure, the number of rotation of the screw. (3) The unknown factors are changed to known factors by using the data. (4) The imperfect plasticized resin temperature estimation equation is changed to a perfect plasticized resin temperature estimation equation by using the known factors. (5) The plasticized resin temperature is estimated by substituting the plasticization conditions into the perfect plasticized resin temperature estimation equation.;COPYRIGHT: (C)2004,JPO