Plastic Rapid Injection Molding is popular not only in low volume manufacturing but also in large quantities molding, it is the most common way to manufacture plastic parts. Weld lines are the result of fundamental physical effects taking place inside of the mold tool cavity, they are common imperfection to be found in most plastic injected molded parts. How can we minimize them and reduce their cosmetic effects by careful product design and manufacturing process control? Let’s share our opinion and experience here:












