Mold Trials Under Realistic Conditions…

I was recently involved in a consulting project with a common issue… Situation The company has purchased a new mold and trials were run. Unfortunately, the PP parts were failing performance tests and exhibiting cracking. The company was investigating the tool in hopes of determining what is different with the new tool. Problem Upon investigation, the tool […]

Why Optimize Packing Pressure…

I was asked this question during a training class… Student Does it really matter if we optimize the packing pressure? My Response Although it depends on the part geometries, an excessive packing pressure can easily add 1-3% to the overall part weight. In an commodity market, such an increase in material consumption may have a […]

Inconsistent Dryer Dewpoint Readings…

I was asked this question recently… Kevin We were encountering complications with the drying of nylon. We have attached a dewpoint meter to our desiccant dryer and the measurements range erratically between -37 and -10°C while operating. The desiccant regeneration is set to 3200 second. There seems to be plenty of suction on the return line from the hopper […]

More on Venting…

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 […]

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 […]