Mold Masters E-type torpedo for PA66 GF30
Has anyone experienced Mold Masters hot runner nozzles with E-type torpedos? We are having big difficulties with the raw material Zytel 70g30 PA66. In my opinion this type of nozzles are not very convenient for the high glass fiber reinforced materials.
First at all, nozzles closes often with the frozen raw material. Increasing nozzle temperature doesn’t help. Because torpedos get bigger and close the gate. So raw materials burn due to high temperature. It is a nightmare to start the process. I would like to listen your advices.
If the torpedo is too close and you need to give more clearance then beware of stringing then the circuit round the gate inserts needs to be run colder. With nylons the balance is fine.
But anyway, Roberto don't worry about the competitor issue. Because we have so many Synventive hot runner systems in the plant as well. I like this group. Because people can openly discuss about technical solutions.
Erol. I think we have no problem with the points you mentioned. Unfortunately, We have no chance to change raw material type.
I will also check the cooling system. I will share the results with you.
There were two main issues.
1. You are right that we had to dicrease the contact surfaces between mould steel and tip.
2. We found out that some torpedos were worn somehow and lost the shape which should transfer the heat. Therefore we could never achive to melt the plastic in front of the tip.
So actions were taken and related issues were solved. I would like to share some images for the actions. But I guess it is not possible here.