Pocket guides provide processors an injection molding “crib sheet,” but in a process with thousands of interactions, applying if-this/then-that logic can’t always get you to a problem’s root cause.
In many part designs, flow fronts will inevitably be split, but how and where they come back together is hugely important to the molded part’s finished strength.
Creating and maintaining a consistent cushion is a key step in achieving shot-to-shot consistency. Learn what cushion is and how it affects part quality.
When determining the best ejection option for a tool, molders must consider the ejector’s surface area, location and style.
Molders looking to both monitor an injection molding process effectively and manage production can definitely do both with tools available today, but the question is how best to tackle these twin challenges.
Each molecule in the molded product can have a different residence time. This variance is reflected in the Residence-Time Distribution, which you can learn how to determine below.
Failing to calculate and accurately account for residence time can compromise material integrity before it’s even injected.
Save time and money by properly controlling the feed-throat temperature. In some cases—but not all—it can help you solve a bridging problem.
Focus on six key metrics to help you determine when a process is lined out and stable enough to start production.
Establishing a process with the widest possible cosmetic window can help put your injection molding on cruise control.
Injection molding’s most common defects can have inverse correlation, where correcting one causes the other, leading to the “chase.”
Keeping your workers safe from the coronavirus makes it extremely important to institute a sanitizing procedure on all touch surfaces of the controller, screen and operating panel. I did some research and here’s what I found.
Duplicating a process from one injection machine to another is frustrating and time-consuming. Develop a mold-specific setup sheet that works in all kinds of presses by differentiating plastic parameters from machine parameters and duplicating those plastic conditions from machine to machine, electric or hydraulic.
Many injection machines use ramp time to control the transition from injection pressure to hold pressure and reduce over-travel. Do you know how to set yours?
Are you sure your press is doing what you want? Visit your controller often to ensure your machines plot the pressure vs. time graph for all your processes. Here let’s focus on pack and hold.
Decompression—aka suckback—is a very important setting on an injection molding machine. On today’s machines, molders typically get the option to set decompression before and after screw rotation/recovery. Are they using this feature to their advantage?