12. Turn on the Hot Runner system and heat to processing temperature.
13. Bring machine barrel back in.
14. Fill the Hot Runner with natural color resin to coat the melt channels with
a neutral color (1-2 shots).
15. Introduce the new color.
16. Leave mold in open position and set the shot size to maximum possible.
17. Purge the entire shot through the Hot Runner and out the gates into the
exposed cavity at the highest injection rate possible. Repeat this several
times.
NOTE
It may be advisable to put a protective shield over the core side to prevent
plastic from injecting and cooling on the core side.
18. Set the shot size back to normal levels and begin processing parts with
increased injection speeds and mold temperature.
19. Continue processing while resetting Hot Runner system temperatures and
injection speed back to normal.
20. Return all settings to normal and conrm acceptable part quality.
Procedure B: More Comprehensive - continued
9-3COLOR CHANGE
Hot Runner User Manual
© 2020 Mold-Masters (2007) Limited. All Rights Reserved.
To Next Page
