I'm getting a "cloudy" surface when injection TPE. I used 4 or 5 different types/brands of TPE in 3 different molds and the surface is always cloudy. I just can't figure out what the problem might be.
Here are the parameters:
I use a Dr. Boy 50 T2
PCS Hot Sprue Bushing - direct gate (pin point gate with 1mm diameter)
Used the TPE straight out of the bag and suspected that the cloudiness might be caused by moisture. Started pre-drying the TPE, but didn't fix the problem.
Played pretty much with every single parameter available but couldn't fix the problem.
Also tested a polished mold vs a sand blasted mold... same cloudiness is visible.
BTW: The round black spot in the middle is not what I'm talking about... this is caused by the air poppet valve (it has a polished surface unlike the rest of the mold which is sandblasted)