Nylon plastic foam ball which belongs to the technical difficulty of plastic products a larger product, because other plastic materials foaming production technology is relatively mature, plastic foam ball early confined PP plastic foam to produce plastic foam ball, HIPS foam and plastic ball in technology is very mature production technology and production have been normal, but special nylon plastic PA, because the cause of the material, by injection molding foaming agent is added, is very unstable, the specific performance does not stop in the gun nozzle of the injection molding machine the flow of plastic, PA plastic injection molding production because of the need of high temperature, high temperature because the temperature is so gun nozzle to set up the corresponding higher, otherwise the PA material reaches a gun nozzle will become cold, caused by the injection molding machine to be able to shoot glue, but the temperature is too high will not stop in the gun nozzle flow now Melt the glue material, so commonly used technique is with self-locking of the gun nozzle to produce every completion of glue injection, the self-locking device will put the gun nozzle lock, don't let the excess plastic flow out, the use of such accessories, ordinary injection molding machine can also produce qualified PA foamed plastic ball and nylon foaming plastic ball.