Plastic Injection Molding Basics 101 - The Injection Press

Our website is frequently visited by product designers, engineers and purchasing agents who are looking for information on plastic injection molding. With this in mind, we created a series of "Basics 101" type articles that are developed to give our readers a better understanding of the presses, processes and pitfalls in our industry. 

We begin our series with information on the basics of plastic injection molding presses. We hope you find this information useful.  If you have specific questions, please do not hesitate to contact us.

Injection Press Basics

While plastic injection molders will help you determine the size of the machine needed to get the best result, a project designer or engineer can get a good estimate based on some basic information. By knowing approximately what size machine will be required, you can better source a plastic injection molder that will meet your needs.

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Plastic Injection Molding 101 - Costs of Manufacturing a Mold

A common question for designers and engineers is “How much will a plastic injection mold cost?”  It makes sense. Injection molds represent the greatest expense in upfront production costs. And, there are many factors that go into determining the cost. With any custom injection molding project, your injection molder will be able to give you the final price tag.

In this article, we will review the variables that can impact the cost so that you can be better informed in making a mold purchasing decision. 

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Save Time and Money with Professional Mold Maintenance

A Low Maintenance Approach to Mold Care

 "The time and care you invest in upfront maintenance will keep costly repairs at bay."

 Let’s face it, our parents were right.  Take care of your things, and they will last a very long time.  It was a matter of necessity.  Back in the day, products were made well and made to last as long as you didn’t abuse them. The same is true in a manufacturing environment.  Take care of your equipment, and it will take care of your production needs for a long time. 

 In the plastic manufacturing environment, the key to consistent quality parts is to start with a quality, well-made mold. We call this our “low-maintenance” approach to injection molding. We begin the process with a solid mold design and a high-quality tool build.  We run prime resins on some of the best machines available.  All of these factors impact quality.  According to Lowell Allen, Sr. Vice President of Manufacturing at The Rodon Group, “When running a 24/7 operation, you can’t afford to have shoddy workmanship.” 

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Injection Molding Machine Basics

If you are planning to manufacturer plastic parts, there is some basic information you should know about injection molding machines.  This article provides an overview of tonnage and clamping force.  We hope you find this information useful.  If you have specific questions, please do not hesitate to contact us.

Injection Press Basics

While plastic injection molders will help you determine the size of the machine needed to get the best result, a project designer or engineer can get a good estimate based on some basic information.   By knowing approximately what size machine will be required, you can better source a plastic injection molder that will meet your needs.

Read More >>

Scary Plastic Part Defects and How to Avoid Them


When purchasing injection molded parts, it is important to understand some of the common but scary problems and defects that impact product quality.  Being familiar with these imperfections and their causes can help you work with injection molders to insure the highest quality part production is achieved.

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Want to learn more about plastic injection molding?

The process of plastic injection molding has been around for years.  And over time injection machines, resins, and mold-building technology have greatly improved.  However, the basics still remain the same.  You take plastic pellets, melt them, and fill a mold with the melted plastic; the result, once cooled, is a plastic part.

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Material Requirement Planning system improves manufacturing efficiency

Like many companies, The Rodon Group recognizes our customers are our most valuable asset.  We pride ourselves on the ability to develop end-to-end manufacturing solutions that meet their demands on time, every time.

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An Introduction to Plastic Injection Molding

Next week, we will launch our new eBook “An Introduction to Plastic Injection Molding.” This resource guide contains information (more than 40 pages) to help designers, engineers and purchasing professionals navigate the world of plastic injection molding. Our goal is to make our customers more knowledgeable about what goes into making a plastic part.  It is written to provide a basic understanding of the presses, the processes and the cost factors involved in manufacturing.  

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Plastic Injection Molding 101 - Injection Molding Terms

Plastic injection molding may not be rocket science, but it comes pretty close. 

There are hundreds of injection molding terms used in the industry.  We have chosen to highlight the most common nomenclature used when discussing injection mold parts, materials and problems. 

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