Patent ID: 7323125

Claim:
A method for analyzing injection molding conditions using input data which includes: mold shape data in which a mold cavity is mathematically defined in response to a shape of a molded resin object, resin path shape data in which a resin path joining an injection apparatus and an injection molding machine is mathematically defined, cavity surface temperature, physical property data of the filling resin, including viscosity, which is temperature dependent, and injection data which includes pressure, temperature, and flow amount of the molten resin filling the inside of the mold, the method comprising: inputting mold shape data regarding a shape of the mold and a shape of a molded resin product into a computer; inputting resin path shape data in which a resin path joining an injection apparatus and an injection molding machine is mathematically defined into the computer; inputting injection data including the flow amount to fill the mold, temperature of the resin, physical data of the resin including viscosity, and data relating to a travel speed of an input screw into the computer; inputting barrel data including barrel cross-sectional area and length, nozzle diameter and length, sprue diameter and length, and resin compression ratio into the computer; calculating flow characteristics including volume of molten resin in the barrel in the process of the molten resin filling the inside of the mold, the pressure of molten resin in the barrel, and the amount of flow at the nozzle, based on the input data; and calculating the flow characteristics of the molten resin flowing into the mold cavity, while taking into consideration the injection nozzle path shape and a compressibility of the molten resin in the cylinder barrel.