KNOW-HOW - INJECTION MOLDING

Mold Simulation

INJECTION MOLDING: The Importance of Nominal Wall For Lightweighting Molded Parts

Establishing a nominal wall is one of the most important decisions an engineer makes when designing parts. Understanding how design changes will impact the manufacturing process is critical to ensure the part performs as expected.
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Injection Molding

INJECTION MOLDING: 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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Mold Maintenance

INJECTION MOLDING: Setting Mold Protection Takes Time But Saves More

Mold protection is often neglected, but it more than pays for the time and attention required.
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Injection Molding

INJECTION MOLDING: Troubleshooting Bridging

Bridging is an aggravating problem that can shut you down. Here's how to find it and fix it.
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Injection Know How

INJECTION MOLDING: ‘Know Your Machine’

Many molders think they “know their machine,” but in reality do not. They get consumed by the demands of day-to-day production requirements and lose sight of the big picture.
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Injection Know How

Screw Speed Versus Recovery Time

Many molders don't take screw-rotation speed into account when developing a process for a new mold. Here's why they should.
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Injection Molding

Shutting Down & Starting Up An Injection Molding Machine

Whether your press is going down for repairs, a holiday, or a slow production schedule, proper shut-down and start-up procedures must be followed.
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Materials

Melt Flow Rate Testing–Part 8

Here are the steps to take in cases where the MFR is not provided by the polymer supplier.
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Injection Know How

How to Set Barrel Zone Temps

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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Injection Molding

How to Establish an Acceptable Range for Pressure at Transfer

Pressure at transfer tells you the viscosity of the resin, providing the fill time is the same. Monitoring pressure at transfer—or better yet, the integral under the pressure vs. time curve—provides insight into the process.
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