What is the purpose of an Air Poppet in a plastic injection mold?
An Air poppet is used to assist with molded part ejection. A small amount of gas is blown into the mold cavity (or off the core) at a desired location to assist with separating the molded part from the desired mold parting line feature. Examples using DME Air Poppets is with deep-draw parts (i.e. buckets) or thin-walled molded parts. Air flow is timed to coincide with the ejection cycle, and this air flow opens the valve to break the vacuum and facilitate part ejection.
