Polyshot has developed a new series of Valve Gate Nozzles with the goal of addressing burning and streaking issues at the gate. This problem is often seen when molding  resins with sensitive fillers and stabilizers. The results of this effort have been the development of the Accutrak series of probes.  Both in-house testing and field applications have verified the performance of this probe design.

The highly magnified images shown here are of the same part with identical processing conditions. The right image shows a part molded with a conventional valve gate probe. The image on the left shows the identical part molded with a Accutrak valve gate probe. The material being processed is nylon with a flame retardant additive. The brown streak at 12 o'clock is clearly visible on the part without the Accutrak.  

The images shown here, present another example of Accutrack technology. In this case it was a 8 nozzle manifold system running unfilled Polycarbonate. The far right picture clearly shows a burn and black specks from conventionally produced valve gating technology. This problem is very common when producing parts with Polycarbonate.