best practices
Part Two: Determining Viscosity Data Using a Slit Die Viscometer
Using a slit-die viscometer connected to a lab extruder can generate accurate data on melt viscosity at various shear rates and different temperatures—a useful QC tool in processing.
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Conveying Elbows Handle 40% Glass-Filled Nylon
Lighter and cheaper than cast alternatives, new stainless-steel conveying elbows utilize a plastics-specific geometry and proprietary internal coating to withstand filled materials.
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Part 5: Heat Deflection Temperature vs. Dynamic Mechanical Analysis
In the final part of this five-installment series, we bring DMA to a practical level using the results for glass-filled nylon.
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How to Quickly Verify Your Machine & Process Setpoints
For a quick check of your process setup, the injection-pressure-vs.-time graph is your best tool.
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Implementing Automation Systems: How to Do It Right
If you’re thinking of putting a complex automation system for high-volume consumables into your plant, consider these tips on making sure both you and your supplier are ready to give it the best chance of success.
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VIDEO: Injection Molding Experts Confront Industry’s Challenges
The technology divide in molding; worst practices; low pay and less training—a panel of injection experts tackled some of the tough issues facing processors today during a panel at Molding 2019.
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Why Barrel Temperatures Have a Small Effect on Melt Temperature
Extruders are not like ovens. Tweaking barrel-temperature profiles will not influence melt temperature all that much. Here’s why.
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The 'Butterfly Effect' in Injection Molding—A Connected Process
In injection molding, a seemingly minor change in a setpoint can have a significant impact on part quality and process robustness and repeatability. That’s why Scientific Molding focuses on process outputs, not setpoints.
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Solving the Bane of Stretch-Blow Molding: Off-Center Gates
There are many reasons why off-center gates happen, and processors should be aware of all of them to quickly find the ones causing the problem.
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Part 4: Heat Deflection Temperature vs. Dynamic Mechanical Analysis
The presentation of DMA data can sometimes frustrate users and discourage its adoption. Those unfamiliar with DMA should insist on receiving data relevant to the manner in which the part they are developing will be used.
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