Injection Know How
Melt Preparation Part 1: Melt Temperature Optimization
A homogenous melt is required for consistent part quality, but achieving it requires balancing a number of factors, including barrel usage and temperature as well as screw speed, backpressure and residence time. Learn how to prepare your melt for molding success in this two-part series.
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How to Set Barrel Zone Temps in Injection Molding
Start by picking a target melt temperature, and double-check data sheets for the resin supplier’s recommendations. Now for the rest...
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What is Backpressure and How Should We Calculate It?
Does using an intensification ratio to calculate backpressure result in an accurate reflection of what’s happening in the barrel? Newer machine technologies have us revisiting an old project with fresh eyes.
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What to Do About Weak Weld Lines
Weld or knit lines are perhaps the most common and difficult injection molding defect to eliminate.
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Are Your Sprue or Parts Sticking? Here Are Some Solutions
When a sprue or part sticks, the result of trying to unstick it is often more scratches or undercuts, making the problem worse and the fix more costly. Here’s how to set up a proper procedure for this sticky wicket.
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Improve Quality & Productivity With Advanced Screw Design
Most molders are still running with screw designs that haven’t changed much in 30 years. But they don’t need to.
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Stop Controlling Your Injection Molding Process with Machine-Only Settings
Monitor and record process outputs instead of the machine setpoints to ensure a validated process regardless of any machine deterioration, viscosity changes or other alterations.
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How to Stop Flash
Flashing of a part can occur for several reasons—from variations in the process or material to tooling trouble.
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A Simpler Way to Calculate Shot Size vs. Barrel Capacity
Let’s take another look at this seemingly dull but oh-so-crucial topic.
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