Sealing Machine with SX Grade
Above 680°F (360°C)

Shutdown

1. Upon completion of the molding operation, purge the machine with ASACLEAN SX following the standard purging procedures.
   
   
2. Begin dropping the temperatures to below 600°F (315°C), while purging. The barrel should be left full of ASACLEAN to prevent the entry of oxygen into the barrel that will accelerate material decomposition and carbon formation. ASACLEAN SX should not be left at temperatures above 700°F (370°C), for more than 30 minutes as decomposition may occur.
   
   
3. If it takes longer than 30 minutes to drop temperatures below 600°F (315°C), displace the SX with a fresh barrel capacity of SX and continue to decrease temperatures. Leave the barrel filled with ASACLEAN SX at all times. Turn off the heat.

Start-up

1. Turn on the heaters and wait until the temperature of ASACLEAN in the barrel reaches 680°F (360°C). Allow adequate time for all of the ASACLEAN to plasticize, including material far from the thermocouple at the barrel wall. Excess residue may appear in parts if enough time is not allowed for the ASACLEAN to completely plasticize.
   
   
2. Continue to increase the temperature in the barrel to the processing range of the high heat resin. ASACLEAN SX should not be left at temperatures above 700°F (370°C) for more than 30 minutes as decomposition may occur.
   
   
3. Add one barrel capacity of fresh SX to the hopper and extrude through the barrel using moderate back pressure (enough to keep the screw forward).
   
   
4. Purge all of the ASACLEAN SX from the machine. If the ASACLEAN purge pile is badly contaminated, purge the machine again with Asaclean SX. Begin feeding the next resin.
   
   
5. Use low back pressure until the next resin begins coming from the nozzle, then follow the standard procedure for purging with ASACLEAN including the maximum back pressure and high screw speed until all of the ASACLEAN is removed from the resin.
   
   
6. Begin production using the normal processing conditions for the resin.