I have received a few follow-up emails on venting, and would like to add the following comments and links for information… Alternate Venting Techniques Ejection – You should always consider venting your moving components such as ejector pins, ejector blades, lifters, stripper plates, and slides are all great components to vent. Since these move each cycle, they […]
Category Archives
Plastics Technology
You Can’t Over-Vent…
I received this commentary form one of our frequent blog contributors… Nathan I expect you to give a very strong message on tool venting in your Plastic Training and Technology Blog. Basically, many of the Moulders are not aware of venting. What should be the best way to make them understand?? Even though they agree, they still […]
Material on the Screw…
Someone asked me this during a classroom session last week… Participant How long can material remain stuck to the screw? My Response Indefinitely. Essentially, if the material adheres to the screw, it can degrade and become baked onto the surface of the screw. I have seen this with materials and additives such as colorants. This […]
Process Outputs for Blow Molding…
I was recently asked this interesting question via email… Technician I hear all this discussion about process outputs for injection molding. Is this also important for blow molding? My Response Yes, process outputs are important parameters to document. These could include parameters such as melt temperature, coolant temperature, part weight, screw RPM, and flash weight can all be useful. […]
Caring for Your Material…
Lately I have noticed a great deal of companies ignoring the integrity of the material during screw recovery. During a recent on-site training visit, one student was encountering significant quality issues with a particular product molded from TPE. In reviewing the situation, it appears the material may be damaged or degraded during recovery which will contribute to the quality […]