Patent ID: 7521008

Claim:
A method for obtaining resin product design parameters for use in an event of designing a resin product to be molded by injection molding, the method comprising the steps of: obtaining a mold clamping force required for conducting injection molding of a resin product having a specified shape using a computer-aided optimization method; and obtaining the design of said resin product based on the thus obtained mold clamping force, and in which a process parameter for determining an inflow of a resin material from a plurality of resin inflow conduits connecting with a cavity is used as a variable parameter for determining said mold clamping force, wherein said process parameter is a parameter which controls actions of valve gates located at said plurality of resin inflow conduits, and wherein resin product design parameters are optimized under the condition where at least one of the valve gates is selected as a timing regulation gate that is restricted by the action of other gates, in order that at least one valve gate is kept open at any given time during filling stage.