best practices
Tooling: Why Ejector Pins Break and How to Prevent It, Part 3
Here we focus on forces, friction, surface finish, and lubrication.
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Extrusion: Head Pressure and Output Stability
Use drag- and pressure-flow equations to analyze fluctuating output.
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Injection Molding: Sliding vs. Locking Ring—Which Non-Return Valve Is Right for You?
The locking-ring style appears to dominate the market, as most believe it makes a make a better seal and leaks less. But is this really so?
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A Processor's Most Important Job, Part 9: Avoid Molded-In Stress
How to establish molding conditions that minimize internal stress in a part.
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Up to Snuff on Scientific Molding? Then it’s Time to Mold ‘Systematically’
Scientific molding is centered around learning about key molding principles and theories. The strategic application of those principles and theories is what’s known as systematic molding.
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Conveyor Upgrade Keeps Currier on Track
Processor’s switch to modular plastic belt conveyors increased efficiency in bottle making by eliminating downtime.
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How to Improve Production of Catheters and Stents
Advances in downstream extrusion equipment have boosted production control.
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Switch to Centralized Vacuum Supply Saves Molder Energy, Boosts Production
Less maintenance means more time for processing, thanks to elimination of vacuum pumps at each press.
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Reducing Low-Level Background Gels in PE Film
While considered acceptable in many cases, they need not be tolerated and are usually attributable to minor screw-design flaws. Here’s some advice on what to do about them.
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Pellet to Gate Control: The Value of a Holistic View of Melt Management
Molders tend to think about the elements of a melt-delivery system, from screw to hot-runner gate, in isolation from each other. But taking an integrated view of the whole system can have big consequences for cycle time, part quality, scrap rates, and energy consumption.
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