Patent ID: 7022271
Filing Date: 2006-04-04
Classification: B29C

Abstract:
1. A method for observing a flow of resin in an injection molding apparatus, which comprises the steps of: providing a transparent cylinder of glass or plastic material, the transparent cylinder being open at opposite ends thereof: interposing the transparent cylinder in place of a mold between a fixed mold mount and a movable mold mount of a mold clamping unit of said injection molding apparatus; causing an injection unit of said injection molding apparatus to inject molten resin into said transparent cylinder; causing the injection unit to terminate injection of the molten resin when the injected molten resin has occupied a predetermined percentage of a total volume of said transparent cylinder; wherein the predetermined percentage is in a range of 50–90%; and during injection of the molten resin into the transparent cylinder, performing direct visual observation of a flow of the injected molten resin inside the transparent cylinder.