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Every day around the world in hospitals and clinics, research laboratories, and universities, numerous plastic products are used for medical parts, devices, appliances, and support equipment. The variety of applications for injection-molded devices is almost limitless. This is due to the fact that plastic injection molding is perfect for making high volumes of identical, close-tolerance …

4 Benefits of Plastic Injection Molding for Medical Devices Read More »

It’s not possible to cover every tooling design decision that a product developer needs to make in partnership with their manufacturing provider. However, it’s possible to narrow these choices down to a few discrete categories that apply to all tools, regardless of their function. Of course, not every type of tooling raw material will be …

What are the Fundamentals of Tooling Design Read More »

Overmolding is a special form of plastic injection molding. Unlike conventional molding, where a finished product is made in one cycle, overmolding requires at least one additional injection cycle using a dissimilar material. This method is also known as 2K overmolding, two-shot molding, or even multiple material molding. Overmolding starts with a base substrate, on …

What is Overmolding Read More »

Witness marks are a function of the injection molding process and these molding defects cannot be completely eliminated. Their effect on the look and performance of the part can be controlled by using good design practices, including the following: Disguise the location of the witness within some other feature of the partUse a submarine gate …

Can gate witness marks be eliminated Read More »

Multiple cavity tooling is an excellent solution for the right project. Here are some of the advantages. Positives of Using Multi Cavity Tooling More parts per cycle, so suitable for larger ordersLower cost per piece that a single cavity toolBetter color consistency between partsThere are, as always, some compromises that product developers should be aware …

Advantages and Disadvantages of Multi Cavity Tooling Read More »

Although every product is unique, the following design tips represent the ‘best practices’ that have been derived from decades of practical experience within the plastic injection molding industry. Product developers are well-advised to consider these guidelines for the following common design features. A boss is a relatively large mass of plastic resin. Whenever there is …

Design for manufacturing guidelines for plastic injection molding Read More »

Surface textures and patterns applied to plastic injection molded parts are becoming more sophisticated and complex. These advancements are exciting because they offer so many new design options for product developers and engineers. But before a finished part can be made, the injection molding tool must first be carefully manufactured. So how do manufacturers apply …

Common Methods for Applying Textures to Injection Molding Tools Read More »

The higher you go in the classification system of surface finishes for mold tools, the more time and effort it takes to produce the finish. In fact, each step of refinement requires first completing the step preceding it. There are no shortcuts here so the costs are additive. Let’s see how each finish is done. …

Plastic Injection Mold Surface Finish Read More »

Color consistency is a critical factor in the injection molding industry, directly impacting product aesthetics, brand perception, and customer satisfaction. However, achieving uniform color across batches and production runs remains a challenge due to variables like material selection, process parameters, and environmental conditions. Here’s how manufacturers can address these issues effectively. By prioritizing material quality, …

Achieving Consistent Color Quality in Injection-Molded Parts Read More »

There are three ways to make custom colors for plastic injection molded parts. For low volumes, only the first option makes economic sense, but in that case, achieving color consistency will be very difficult. Alternately, using compound custom material, or using a masterbatch colorant, allows color consistency within batches. But these methods are only suited …

Injection Molding Custom Colors Read More »