|
Polyshot .jpg) 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.
The left image is again the same part, mold and processing conditions with the exception of the Accutrack nozzle being installed. The black specks are totally eliminated and the gate area exhibits a very uniform fill totally void of cold slugs etc.
The Accutrak probe is available in both pinpoint and valve gated versions for M10 and M11 series nozzles. This series of probe is not suitable for glass filled resins or other abrasive materials. Accutrak probes are especially effective on polycarbonate, acetel and other materials with unstable fillers such as UV and flame retardants.
If you would like to include a Polyshot Accutrak on your next project, contact 1-800-Polyshot, or sales@polyshot.com.
|