Know-How
Imagine A World Where Polymers Were First
One reason for the disproportionate attention that plastics receive in the environmental conversation is that they are newcomers. Perhaps if we had been relying on them for thousands of years, we’d view them differently.
Read More
Is There a More Accurate Means to Calculate Tonnage?
Molders have long used the projected area of the parts and runner to guesstimate how much tonnage is required to mold a part without flash, but there’s a more precise methodology.
Read More
Where and How to Vent Injection Molds: Part 3
Questioning several “rules of thumb” about venting injection molds.
Read More
Configuring the Twin Screw Extruder: Part 4
For many compounding operations, material is fed to the extruder at the feed throat. This is the case when feeding a single polymer or a blend of polymers mixed with solid additives. Some ingredients, however, present a challenge in feeding. Here’s how to solve to them.
Read More
Back to Basics on Mold Venting (Part 2: Shape, Dimensions, Details)
Here’s how to get the most out of your stationary mold vents.
Read More
Single vs. Twin-Screw Extruders: Why Mixing is Different
There have been many attempts to provide twin-screw-like mixing in singles, but except at very limited outputs none have been adequate. The odds of future success are long due to the inherent differences in the equipment types.
Read More
Back to Basics on Mold Venting (Part 1)
Here’s what you need to know to improve the quality of your parts and to protect your molds.
Read More
How to Design Three-Plate Molds: Part 2
There are many things to consider, and paying attention to the details can help avoid machine downtime and higher maintenance costs, and keep the customer happy.
Read More
What's the Allowable Moisture Content in Nylons? It Depends: Part 2
Operating within guidelines from material suppliers can produce levels of polymer degradation. Get around it with better control over either the temperature of the melt or the barrel residence time.
Read More
How to Design Three-Plate Molds, Part 1
There are many things to consider, and paying attention to the details can help avoid machine downtime and higher maintenance costs, and keep the customer happy.
Read More
