Patent ID: 7470382
Filing Date: 2008-12-30
Classification: B29C

Abstract:
1. A method for determining a production parameter of an injection molding, in an event of implementation of injection molding using a mold having a plurality of resin inflow conduits to cavity, by combination of a numerical analysis method for calculating injection molding process and a computer-aided optimization method wherein said production parameter determines time-sequentially an inflow of resin material from resin inflow conduits into said cavity wherein said production parameter is determined in order to control a mold clamping force required for injection molding, wherein said production parameter is a parameter to control the action of valves gates positioned in a plurality of resin inflow conduits, wherein said production parameter is optimized under a condition that at least one of said valve gates is opened at any spot of time during a filling stage; and wherein target areas for controlling weld line occurrence are divided into a plurality of areas, the quantity of weld line occurrence in each area is weighted, the weighted quantity of weld line occurrence is summed to obtain a weld line evaluation value, and the weld line evaluation value thus obtained is used to induce said weld line occurrence to a specified area or to avoid said weld line occurrence from a specified area.