Good morning,
Can you tell me please benefits of a sequential gate during filling phase, and during packing phase?
thanks a lot!
Benefits of sequential gates are many.
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1. It can be opened and closed at any point of filling phase and packing packing phase.
2. It can be used to control pressure
3. It can be used to control tonnage.
4. It can be used to avoid or minimise or relocate weld lines.
5. It can be used to improve filling and packing phase.
6. It can be used to less gate vestige purpose only.
7. It can be used to fine tune warpage.
8. It can be used for family mold flow balancing.
You need to understand and select as you wish to use.
Thanks madhukeshwart for the answer.
Excuse me if i abuse of your patience, but can you tell me (or tell me where to find this answer) what to do to obtain benefits you are saying?
I mean for example if the benefit would be "controll weld line position" i could say a possible way is to reduce thickness were i want to slow down the flux.
So connected to your list, for example what have i to do to improve filling and packing?
I'm asking because my client has spcifically requested a sequential gate to improve packing, but i don't know how a sequential gate can improve it.
Another thing please:
my study is composed by 3 shots, of the same material (different colours).
Obviously i'll start with the analysis of the 3 parts individually, but then what do you suggest?
1 overmolding with first and second part?
1 more overmolding with second and third part?
or one analysis with first and second parts analized like inserts in the third part?
Could it be a smart solution to use an overmolding analysis, with first shot made by first part and the second part with a sequential gate which will open after the whole cycle time of the first part, and then the third part as a second shot? But i don't know how to set packing pressure profile in this case...
Thanks Thanks Thanks Thanks Thanks Thanks
can you tell me (or tell me where to find this answer) what to do to obtain benefits you are saying?
I mean for example if the benefit would be "controll weld line position" i could say a possible way is to reduce thickness were i want to slow down the flux.
Difficult to get examples as mostly NDA will stop everyone to share case studies. You learn how to use and sequential gates.
Try to controlling the valve gate timing to get a weld line positions, with multiple gating option.
For example: 1. if we open two gate at a time, what happens. Where welding will come ?
2. If we open one drop early and other late by 0.2 sec for example. Vice versa
3. If we open one drop early and other late by 0.4 sec for example. Vice versa etc …try with different combination of valve gate opening timings.
So connected to your list, for example what have i to do to improve filling and packing?
I'm asking because my client has specifically requested a sequential gate to improve packing, but i don't know how a sequential gate can improve it.
I assume, you know, how gate location, packing pressure and time of packing effects on volumetric shrinkage , which itself enough.
Try different combination sequential gate opening and close. Try to achieve uniform volumetric shrinkage across the part. You itself can have your own example,
Another thing please:
my study is composed by 3 shots, of the same material (different colours).
Obviously i'll start with the analysis of the 3 parts individually, but then what do you suggest?
1 overmolding with first and second part?
1 more overmolding with second and third part?
or one analysis with first and second parts analized like inserts in the third part?
Could it be a smart solution to use an overmolding analysis, with first shot made by first part and the second part with a sequential gate which will open after the whole cycle time of the first part, and then the third part as a second shot? But i don't know how to set packing pressure profile in this case...
‘Over molding simulation of 3 shot tool’ is not possible right now. Ignore any one or try with 3 combination.