Hot Runner vs Cold Runner Injection Molding: Understanding the Key Differences for Optimal Mold Design.
Introduction: Injection molding is a widely used manufacturing process for producing high volumes of plastic parts cost-effectively and efficiently. In this process, molten plastic is injected into a mold cavity under high pressure, cooled, and then ejected as a solid part. One important factor in injection molding is the runner system, which is responsible for supplying molten plastic to the cavity. There are two main types of runner systems used in injection molding: hot runner and cold runner. Both have their unique advantages and disadvantages, making it essential for mold designers and engineers to understand their key differences for optimal…