As you’ve learned in the first three lessons of the Molding Process Development section, the injection molding process is a very complex and scientific manufacturing process. In this lesson we will apply the theoretical information covered in the first three lessons to an actual part. This lesson focuses on the development and execution of a process development strategy for a four-cavity molded cup part.
In this lesson you will learn: how to design a process to achieve a specific cycle time and eliminate residual molded-in stress; the steps to take to reduce a polymer material’s in-mold viscosity; how changing the packing and holding profile affects pressures and clamp tonnages inside a cavity; and how a closed loop-controlled two-step fill speed profile affects required injection pressures and clamp tonnages.
