Know-How
The Effects of Time on Polymers
Last month we briefly discussed the influence of temperature on the mechanical properties of polymers and reviewed some of the structural considerations that govern these effects.
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The Effects of Stress on Polymers
Previously we have discussed the effects of temperature and time on the long-term behavior of polymers. Now let's take a look at stress.
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How Backpressure Optimization Affects Melt Preparation
Backpressure is often the least understood of the settings in an injection molding process, even though it can play a significant role in the final quality of the part. Let’s start with understanding what backpressure is and then learn how to optimize it for a given mold.
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Tracing the History of Polymeric Materials, Part 27: Liquid-Crystal Polymers
Liquid-crystal polymers debuted in the mid-1980s, but the history of the chemistry associated with this class of materials actually starts a century earlier.
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How Screw Design Can Boost Output of Single-Screw Extruders
Optimizing screw design for a lower discharge temperature has been shown to significantly increase output rate.
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21 Tips to Slash Energy Costs in Molding
This checklist can provide injection molders a good starting point on the path to reduced energy consumption and can generate some money savings on that journey.
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The Impact of Hydraulics on Tool Design, Practical Uses — Part 2 of 2
Here are more tips on using hydraulically actuated devices on your tools.
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Tracing the History of Polymeric Materials, Part 26: High-Performance Thermoplastics
The majority of the polymers that today we rely on for outstanding performance — such as polysulfone, polyethersulfone, polyphenylsulfone and PPS — were introduced in the period between 1965 and 1985. Here’s how they entered your toolbox of engineering of materials.
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The Impact of Hydraulics on Tool Design -- Part 1 of 2
Get a better understanding of their use, proper sizing, and how the tool design and setup in the machine can impact failures in manufacturing.
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Troubleshooting Vent Flow Problems in Single-Screw Extruders
Vent flow can be a costly problem and a housekeeping nuisance. Here is some advice on how to eliminate it.
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