Molding assistance device for injection molding machine

A molding assistance device is provided for an injection molding machine which performs molding support for an injection molding machine that injects and fills a mold with a plasticized molten resin by means of a screw and molds the resin, the molding assistance device comprising:

• a driver group configured to drive the molding machine;
• a controller including a CPU and an memory, connected to the driver group, and configured to control the driver group to drive the molding machine;
• a display connected to the controller,
• wherein the controller is programmed to function as:
• a basic information setting function unit which sets basic information including at least resin data relating to a pellet material, screw data relating to a screw, and molding condition data relating to molding conditions;
• a computation processing function unit which has at least a provisional plastication time computation processing unit for calculating a provisional plastication time from the basic information,
• a melt film heating amount computation processing unit for calculating a heating amount of a melt film from the provisional plastication time obtained from the provisional plastication time computation processing unit, and
• a plastication delay time conversion processing unit for converting the heating amount of the melt film obtained from the melt film heating amount computation processing unit into a plastication delay time;
• and
• an output processing function unit which outputs the plastication delay time or plastication information obtained based on the plastication delay time to the display,
• wherein the screw data includes data relating to a type of material of the screw surface,
• wherein said computation processing function unit includes a decomposition ratio computation processing unit for calculating an estimated resin decomposition ratio by using decomposition ratio computational data for calculating the resin decomposition ratio of the screw surface during molding based on said basic information, and
• wherein the controller is further programmed to control the display to switch between a first determination results display and a second determination results display, the first determination results display including a determination of appropriateness of the plastication delay time based on a first predetermined determination criterion along with first assistance messages, the second determination results display including a determination of appropriateness of the estimated resin decomposition ratio of the screw surface during molding based on a second predetermined determination criterion along with second assistance messages, and
• wherein the controller is further programmed to optimize the molding conditions based on the first and second determination results displays, and control the driver group to drive the molding machine based on the optimized molding conditions.