Cold runner injection molding is a metal casting process that uses unheated molds and channels to inject molten plastic into the mold cavities. The runner system is the part of the mold that delivers the plastic from the sprue to the gate. In cold runner injection molding, the runner system cools and solidifies along with the plastic part, and needs to be separated and recycled after each cycle. This can result in material waste and increased cycle time. However, cold runner injection molding price can save cost and material by optimizing the design and size of the runner system, using low-cost materials, and regrinding and reusing the runner material.