The Rodon Group is world-renowned for the production of injection molded components of the highest quality and precision at highly competitive prices. From concept to completion, we provide all of the necessary resources to promptly and accurately complete your project.


Rodon utilizes the latest design software, builds your stainless steel tool in our CNC driven tool room and manufactures your parts in our automated 125 press facility with quality checks along every step of the process.

We serve a diverse group of industries including windows and doors, medical and pharmaceutical, consumer products, construction and food & beverage.

The Rodon Group Difference

At Rodon, we are proud of the reputation we have built in the plastic injection molding industry, a reputation for high-quality, just-in-time, precision parts manufacturing. Our state-of-the-art facility is equipped with the latest in automation, scheduling and quality inspection technology. We partner with only world-class suppliers. The resources of our supplier base, in addition to our in-house capabilities, provide a customized manufacturing solution.

See each step of The Rodon Group's plastic part production process and our obsessive attention to achieving perfect parts!

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Plastic Injection Molding Design

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Rodon Group Capabilities

Plastic injection molding is a method of producing high-volume precision parts at a low cost. This versatile process can create even highly complex or intricate shapes precisely and efficiently. To ensure success, developing a precise and moldable design is critical. The most effective mold designs are optimized for consistent wall thickness and ease of ejection, among other factors, while keeping manufacturing costs in mind. 

Rodon engineers have over 25 years of experience in designing and building molds. This extensive background gives our team the expertise necessary to develop creative solutions for even the most challenging design manufacturing problems. In plastic injection molding, several design factors are particularly crucial for ensuring finished product moldability, quality, and cosmetic appeal. Wall thickness, ribbing, and boss design are all key focus areas for proper part design. 

Wall Thickness

Achieving uniform wall thickness is crucial as it will eliminate most of the possible manufacturing defects by ensuring the mold fills and cools correctly. Melted plastics flow into areas of least resistance first. This means that thick-walled areas are the first to fill. 

Ensuring a mold design features uniform wall thickness will improve a part's strength, weight, and aesthetics. Parts that are too thick frequently result in unsightly warping, sink, or internal voids. Part uniformity can be maintained by coring or hollowing out thicker regions in the part design. 


Ribbing is a crucial component of a part's overall strength, as it supports the walls and other dimensional components. Ribbing typically makes up 50% to 70% of a wall's total thickness, as any greater percentage risks sinking. A part that is intended to be structural should contain ribs as well as supporting gussets if properly designed. These increase strength and help eliminate cosmetic defects, such as voids, sink, and warp. 


Bosses accommodate assembly through pins or screws. They should be the same thickness as ribs and also require draft to aid in ejection.


High-quality, precision molds take time and exceptional accuracy to build. They are designed to last for years and can represent a large investment in the manufacturing process, particularly when large-volume manufacturing and complex tooling are involved. Choosing a knowledgeable and reliable toolmaker is essential. 

The Rodon Group fabricates the best tooling in the industry, with an exceptional tool warranty to reinforce these claims. We design tools for high-volume, low-tolerance production over the lifetime of your project. As long as we are running a tool that we built, there will never be any maintenance or repair charges. All of our tools are constructed from stainless steel mold bases and cavities, ensuring optimal durability and performance. 

Plastic Injection Molding Manufacturing

After a production mold is finalized and the machine has been prepped, manufacturing can begin. We perform an initial run to thoroughly examine components for any part defects. When no defects are found, full production can begin. Rodon carries a comprehensive selection of injection presses that are classified based on clamping pressure. The machine used depends on many variables, including the type of resin selected, mold size, and the number of cavities. 

Depending on the part and the molder's agreement, quality checks take place on a regular basis. These checks inspect for:

  • Color correctness
  • Strength
  • Flash
  • Warping

Plastic Injection Molding Automation

Rodon uses an MRP (Material Requirement Planning) system. This tool allows our manufacturing team to monitor all jobs from the minute they are initiated to the time they are delivered, including all downstream impacts. Our facility of 125 presses runs 24 hours a day, 7 days a week for maximum efficiency.

Download our custom high volume plastic injection molding specs

Plastic Injection Molding Materials

Understanding the differences between plastic injection molding materials is crucial for selecting the most appropriate material for a given application. When selecting the best material for your project, it's important to consider factors such as the end-use environment, desired final appearance, and what industry-specific regulations need to be met. 

We expertly help our clients select the most appropriate material for their projects, for high-performing yet cost-effective results. While many types of plastic resins are used in the plastic injection molding process, the top five most common plastic types include:

  • Acrylonitrile Butadiene Styrene (ABS)
  • Celon® (Acetal)
  • Low-density polyethylene (LDPE)
  • Polypropylene 
  • High Impact Polystyrene (HIPS)

Fulfillment and packaging

We pride ourselves on providing Just-in-Time manufacturing to suit the fulfillment demands of each client. Quality control checks are performed as components are sorted, weighed, and sealed for stock or shipment. In keeping with our commitment to automation and conservation, our servo robots provide custom stacking and packing to minimize cartons and freight charges.


With over 65 years of experience creating custom plastic parts for customers throughout diverse industries, The Rodon Group has a unique perspective on manufacturing high-quality, high-volume parts at the lowest possible cost. We pride ourselves on identifying the most high-performing and cost-effective solution for each client. 

The industries we serve include:

  • Construction
  • Food and beverage
  • Medical 
  • Pharmaceutical
  • Window and door
  • Household appliance

We have expertise in creating components for a diverse portfolio of goods. Our past experience includes everything from bearings and custom housings and fasteners, to bed frames, lawn and garden supplies, point-of-purchase displays, and more. You can view images of our industry-specific part examples here.

Contact The Rodon Group for Plastic Injection Molding Services

At The Rodon Group, high-volume, customized plastic injection molding is our specialty, and our projects are world-renowned for their quality and precision. With decades of experience in thermoplastics and a dedication to technological innovation, we are a trusted provider of high-quality plastic injection molding services. We specialize in strong plastic materials and offer guidance on industry-diverse applications. Our team can create a high-performing solution that matches your exact requirements. Learn more by contacting us today, or request a quote to get started on your next project. 

A summary of our plastic injection molding capabilities:

Additional information

Resource Library

An Intro to Plastic Injection Molding Download eBook
10 Must-Ask Questions When Choosing a Plastic Injetion Molder Download eBook

Our Capabilities

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