Know-How

PART 2: The Importance of Consistent Fill Time

To make identical parts, you need to keep fill time constant. In part one we covered the why. Here’s the how.

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Part 1: The Importance of Consistent Fill Time

To make identical parts, you need to keep fill time constant. Here’s why.

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Telltale Signs of Screw Wear

Determining the cause of wear is the first step in eliminating it.

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best practices

Tricks of the Trade on RTOs and RSOs

The more you know about these runner diverters and shutoffs, the more you’ll use them. Here’s how to put them to work in your mold..

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Part 11: A Processor's Most Important Job

It’s the processors job to ensure molded parts contain enough stabilizer to perform to the expectations of the end use.

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Identifying and Correcting Splay

Splay adjustments can be a simple fix, or can require several hours of babysitting a press and head scratching. Learn to find the root cause.

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A Processor’s Most Important Job, Part 10: Fiber-Length Retention

Glass and carbon fibers are often used to increase material strength and modulus. To maintain these properties, the aspect ratio of these fibers must be maintained.

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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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Plastics Size Reduction
Process Cooling