Injection Molding: Controlled Production Shutdown For PET Preform Molding
Netstal machine uses stored braking energy to maintain power during brief outages and allow controlled shutdown without short shots.
In harsh industrial environments, even brief power failures or fluctuations in the grid lasting milliseconds can interrupt the molding cycle, which cannot always be restarted immediately because of the potential presence of short shots in one or more cavities. In PET preform molds with many cavities, removal of short shots can be laborious and carries the risk of damage to the mold.
Consequently, Netstal (U.S. office in Florence, Ky.) is offering a new option for its PET-Line preform molding systems. Called CPP, for Controlled Production shutdown during a Power outage, it will provide enough power to complete the current cycle. (This power comes from braking energy recovered by the drive system.) And if the outage lasts longer, then sufficient power is provided to reliably and controllable shut down the process.
After the previous shot is fully injected and demolded, metering of the next shot is stopped and the entire system is brought to a halt. All axes are returned to their end position. As soon as the power returns, production can be started up again.
Related Content
-
How to Optimize Injection Molding of PHA and PHA/PLA Blends
Here are processing guidelines aimed at both getting the PHA resin into the process without degrading it, and reducing residence time at melt temperatures.
-
In Sustainable Packaging, the Word is ‘Monomaterial’
In both flexible and rigid packaging, the trend is to replace multimaterial laminates, coextrusions and “composites” with single-material structures, usually based on PE or PP. Nonpackaging applications are following suit.
-
ABC Technologies to Acquire Windsor Mold Group Technologies
The Tier One automotive supplier with compounding and blowmolding machine capabilities adds the 50-yr-old molder and moldmaker.
