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Pressure peak while using valve gate sequencing

Pressure peak while using valve gate sequencing

Hello together,

 

I have a problem in Mold Flow when using different valve gate opening times. My model has 3 valve gates in sum and two cavities. The 2 valves gates of the first cavity are opened first and at the same time. The third valve gate of the second cavity is opened additionally when 4 % of the total volume is already filled. Unfortunalely I get high and very short pressure peak (around 1800 bar) just before the third valve gates opens.

 

Only for information: The two cavities have a great volume difference.

 

Does anybody know or imagine why this happens?

 

Many thanks in advance for any support

 

 

Best regards

 

hennsym

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