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22nd October 2019, 08:18 PM
#1
Re: Unstable cushion
Decompression as well as wet material comes to mind.
Also if your nozzle ID is too small your cushion will bounce - especially with hot-runner tool. Difficult to get consistent pressure/times/speeds through your a tight nozzle, through the hot-runner, into your (small?) gates, and then into your full cavities.
See how much injection pressure you use at the nozzle by doing an air-shot -
or if you want to be more thorough you can do a pressure loss study to see where all pressure is going through your system
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12th December 2019, 06:54 PM
#2
Re: Unstable cushion
We finally fixed the variation with a new screw and barrel.
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13th December 2019, 04:32 PM
#3
Re: Unstable cushion
Thanks for letting us know Filiberto. This helps us learn!
Thanks,
Suhas
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