I love vents and can't argue with their necessity, but I think freedesigner has given you the best lead. We have been using Beaumont's Melt-flipper and it works. I originally thought it was a crazy idea but it has worked for us. Of course, you have to pay a royalty to use the idea. Check the...
Yanish- thanks for the response. We have seen the sharp edge problem in other cases and it has helped to radius them. In this case however, there is no evidence of the downspout being scraped on the way out.
We are molding glass filled PBT and are getting small specks of material that come from the gate area when the part is separated from the tunnel gate during mold opening. These small specks then stick to the mold face (where they are smashed flat)and have the potential of ending up on the...