Page 41 - Injection Molding Advanced Troubleshooting Guide
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2.9 Dew Point Meter  23



          „ „2.7„ Process Monitoring Equipment



                                                    ®
          Process monitoring equipment like RJG’s eDART  can be very useful for diagnos-
          ing problems at a deeper level. The biggest advantages to using a process monitor-
          ing system to help troubleshoot are as follows:
             ƒ Allows collection of large amounts of data including:
              ƒ Machine pressures
              ƒ Cavity pressure
              ƒ Mold temperatures
              ƒ Cooling
              ƒ Fill speed
              ƒ Fill profile
              ƒ Dryer function
              ƒ Weather
             ƒ Allows storage of data for easy analysis
             ƒ Allows a baseline template to be saved
             ƒ Allows capture of intermittent problems; it captures data on every shot
          The use of process monitoring equipment can be a tremendous benefit to the
            troubleshooter. It can provide all the data detail to dive deep into every phase of the
          process.




          „ „2.8„ Moisture Analyzer



          A moisture analyzer is a useful tool to help determine if the material has been ade-
          quately dried. A loss on weight moisture analyzer can give a false high reading,
          however, because it will measure the total weight loss during heating of the mate-
          rial, which could include volatiles other than water.





          „ „2.9„ Dew Point Meter


          To verify that a dryer is working properly the dew point must be measurable. Some
          dryers have built in dew point monitors but portable meters can be purchased from
          industrial supply shops. If material drying is the root cause of the problem, con-
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