In the field of injection molding, main runner sticking is a problem that cannot be ignored. It refers to the phenomenon where the main runner of the injection molded part fails to separate from the plastic mold during the ejection process.

In the field of plastic injection molding, product cracking is an issue that cannot be ignored, encompassing various forms from minute cracks to complete fractures. Delving deeper, these cracking phenomena can be attributed to two major causes: mechanical cracking and chemical stress cracking.

In our previous article, we discussed the main causes of stress marks in plastic molding products. Now that we understand the causes, it's imperative to explore ways to minimize internal stress during the production process. With guidance from the engineers at Dongguan Yize Mold, the solutions are outlined below: