Articles

Part concept and design are vital elements to the molding process. Because of this, it is highly...

Not all pressure is created equal. There are various parts of the injection molding machine where we...

We often see injection molders running machines with inappropriate tonnage—it's something many people...

In How Second Stage Speed Influences Your Process: Part 1, we looked at what effects the second stage...

It's always fun to reflect back on where we came from and see how far we've come, so we thought we'd...

Troubleshooting can take on many meanings for injection molders. All too often they find themselves running to a machine, turning knobs and pushing buttons….

There are several ways to control your injection molding process, but which way is the best? The short...

There are a lot of ways to prevent sink marks from occurring in injection molded parts, and understanding how and why they happen is the first step. Here are 5 ways you can prevent sinks from happening in your injection molded parts.

Part cooling is always a function of wall thickness and the material that the design engineer selects. It’s up to the mold design engineer to place the cooling channels in the proper location to allow for a minimum cooling time. As a process engineer, the old adage of “fill as fast as possible consistent with quality” still holds true. If the volumetric flow rate is very low, the chances of packing out a part are slim to none because the material will likely be frozen.

Viscosity is a fluid’s resistance to flow, or the amount of friction that exists in the material. The higher the viscosity, the more friction that exists, so the more pressure you need to inject it into a mold.

One of the first decisions that needs to be made when designing a new injection molded part is which...

There are a lot of moving parts when it comes to injection molding part and mold design. Between product design, material selection, mold design, and processing, collaboration is key to ensure a successful project.

Injection molding is a cost-effective way to produce parts, but there is often a significant amount of waste involved, from inefficiencies to user errors, machine damage and downtime, high scrap rates, and more. Here are 7 ways to lower your injection molding costs so you can improve your bottom line.

Short shots are among the most common and visually obvious quality issues most molders face. So what causes them? How can we prevent them? And how do we troubleshoot them when they do occur? A short shot is when a plastic injection molded part does not completely fill out—a portion of it is missing. A few issues can cause short shots, and the fix is not always straight forward.

By John Lobozzo, Technical Sales Engineer at RJG Technologies   Whether you've been directly...

In the plastic injection molding industry, we work with materials that are byproducts of oil refinement...

By Jim Clifford, Consultant / Trainer, RJG   Clamp force is one of the most overlooked portions of...