In this series we delve into a discerning look back into the history of our industry and how we all got here.
Each molecule in the molded product can have a different residence time. This variance is reflected in the Residence-Time Distribution, which you can learn how to determine below.
Follow these detailed tips to get you the jobs you want. Here we factor in the costs of scrap and regrind, along with energy and certain additives.
Follow these detailed tips to get you the jobs you want. This installment focuses on the various raw material aspects of quoting.
You run the risk of wasting time and money by not understanding what’s causing your screws to wear.
In this series we’ll delve into a discerning look back into the history of our industry and how we all got here.
Recycling and achieving circularity for materials is at the core of the plastics industry’s evolving sustainable business model. Advanced technologies will play a big role.
Failing to calculate and accurately account for residence time can compromise material integrity before it’s even injected.
Save time and money by properly controlling the feed-throat temperature. In some cases—but not all—it can help you solve a bridging problem.
CO2 can be used as a totally “green” solvent to remove many kinds of contamination in recycled plastics without the need for toxic solvents.
PAI is a material capable of achieving levels of performance that even semi-crystalline engineering polymers like PEEK, PPS, and PPA cannot. But you have to be willing to work for that performance, and the annealing process is an essential part of this.
This usually crops up when the two stages are not matched in output. The best solution is to install a pressure-adjusting valve at the discharge end of the extruder.
Focus on six key metrics to help you determine when a process is lined out and stable enough to start production.
Every processor should get hold of the viscosity curves for the polymers they use or contemplate using in their operations, and learn how to read them.
TPUs form physical, rather than chemical, crosslinks that can be broken by reheating. Formation of these crosslinks can be sped up by annealing, which improves a variety of properties.
Since many plastic products are made of a combination of materials with very different melting points, careful consideration must be given to designing screws when it comes time to recycle these products.
As with semi-crystalline thermoplastics, annealing can be used in thermosetting polymers to obtain a level of crosslinking that may not be possible within the molding cycle.
Some molding shops insist that all of their molds have springs to return the ejector plates. And there are lots from which to choose. Here we’ll focus on compression die springs for injection molds.
Some amount of scrap—generated in startup, shutdown or defective parts—is inevitable. How can you reclaim regrind into new profitable parts?