Forum Replies Created
We had definetly too less material in the mould. After opening the mould after 20mins of melting we put more material inside. But with the material we also put air inside, which also creates bubbles.
We made also an Temperature test with the result, that in our setting the mould needs about 20mins to reach the temperature of the heater. So we heat up the mould 30 mins before we fill it up and put more material inside. More tests will follow…
The press is made by PHD Equipamentos para laboratorios:
3kW, max 15 Ton
It depends on the polymer you are working with. Every polymer has a specific structure and reacts differently to additives.
There is also a lot of literature about it, in whitch you can read more about the common additives. (for example: https://www.sciencedirect.com/science/article/pii/S030438941730763X or Additives for Plastic Handbook, you can find it for free in online libaries).
It would be interesting to get some more information what is your plan and also to see the results.
Wow thank you for the fast help! Thank you @s2019, I did not know this amazing thread by @gujonon.
And also thanks to @imuh, you did some really nice pieces 🙂
Today I will try to open the mould after 20 mins of compression heating to fill the mould totally. I think you are right and we don´t get the right amount of plastic in the mould..
And also that there is no point of excess for the plastic, maybe I try to drill a hole at the side, but the aluminium moulds is so expensive. Then you could also try to use it with the injection.
Nice help so far! 🙂