Know-How
Why Shoulder Bolts Are Too Important to Ignore (Part 1)
These humble but essential fasteners used in injection molds are known by various names and used for a number of purposes.
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Looking to Run PCR on a Single Screw? Here’s What to Keep in Mind
Just drop it in and mix it up? Sorry, there’s a lot more to it than that. Here is some of what you need to consider.
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Time to Swap Out Those General-Purpose Injection Nozzle Tips
Still the standard in the industry, GP nozzle tips can cause a myriad of problems for molders. There are alternatives out there that should be examined.
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How to Configure Your Twin-Screw Extruder -- Part 2
Follow these tips to configure your twin-screw elements to promote feeding and solids conveying.
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Tracing the History of Polymeric Materials, Part 28: Making LCP's Melt Processable
Liquid-crystal polymers based on a single monomer produces a polymer with a very high melting point.This presents two problems. Here’s how they were solved.
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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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