High-Precision Plastic Injection Molding Services in Detroit, MI
Ronningen is a trusted leader in plastic injection molding and manufacturing services in Detroit, Michigan, with over 50 years of industry experience. We specialize in producing high-precision molded plastic parts for industries such as automotive, aerospace, medical devices, and consumer electronics. Our state-of-the-art facility is equipped with the latest injection molding technology, allowing us to efficiently handle both small-scale prototype runs and large-scale production projects.
Beyond traditional injection molding, Ronningen offers a wide variety of secondary services, including over molding, insert molding, machining, and ultrasonic welding. These services help streamline production, reduce lead times, and ensure that each part meets the highest quality standards. Ronningen is dedicated to delivering efficient, reliable, and cost-effective manufacturing solutions to businesses in Detroit.
Complete Manufacturing Solutions for Detroit’s Industries
At Ronningen, we offer a comprehensive range of plastic manufacturing services designed to support Detroit businesses. We specialize in plastic injection molding, over molding, insert molding, and structural foam molding, providing high-quality parts with exceptional durability and precision. Whether you need a few prototype parts or large-scale production runs, our team is equipped to handle all sizes of projects.
We also provide essential secondary services, such as leak testing, machining, custom cutting, and pad printing, all of which are performed in-house. This helps to reduce lead times and ensures that your parts meet both functional and aesthetic requirements. By offering these services under one roof, Ronningen streamlines the production process, saving you time and costs while ensuring your parts are delivered with the highest quality.
Precision Manufacturing for Detroit, MI’s Growing Industries
Ronningen combines advanced technology and precision engineering to deliver high-quality plastic parts for businesses in Detroit. Our team uses high-tonnage machines and cutting-edge molding technology to produce parts with tight tolerances and exceptional accuracy. We offer specialized services such as ultrasonic welding, spin welding, and structural foam molding to provide durable, high-performance parts for a variety of industries.
In addition to molding, we offer in-house machining, leak testing, part marking, and custom packaging, ensuring that your parts are produced to your exact specifications. With Ronningen’s integrated approach to manufacturing, you benefit from faster turnaround times and improved efficiency, all while maintaining the highest standards of quality and performance.
Why Detroit, MI Manufacturers Choose Ronningen
Ronningen is the preferred choice for Detroit manufacturers because we provide an integrated, comprehensive approach to plastic injection molding and manufacturing. We offer not only precision molding but also a wide range of additional services, including machining, electroplating, pad printing, and custom packaging. Our team of experienced engineers works closely with you to optimize designs and material selection to meet your specific production needs.
In addition to traditional molding, we specialize in over molding, insert molding, and structural foam molding, which allows us to handle the most complex projects. Our ability to manage all these services in-house reduces lead times, lowers costs, and simplifies the production process. Detroit manufacturers trust Ronningen for our commitment to quality, customer satisfaction, and innovation.
Fast and Efficient Plastic Manufacturing Solutions for Detroit, MI
Ronningen’s Detroit facility is designed to meet the fast-paced demands of local businesses requiring high-quality plastic injection molding services. We understand that quick turnarounds are critical, especially when working with prototypes or tight schedules. Our team is equipped to handle everything from rapid prototyping to high-volume production with the same level of precision and quality, ensuring your parts are produced efficiently and delivered on time.
In addition to injection molding, we offer secondary services such as machining, leak testing, part marking, and packaging. These services help streamline the production process, reduce costs, and ensure that your parts are ready for use when they arrive. Ronningen is committed to providing cost-effective, reliable solutions to meet your manufacturing needs.
High-Precision Plastic Injection Molding Solutions in Detroit, MI




Our ISO 9001 certified quality management system is registered and certified by NSF International Strategic Registrations and based on a number of quality management principles including:
- A strong customer focus
- Support of top management
- Adherence to a process approach
- Continual improvement
Under the scope of our registration are the following services:
- Prototype plastic injection tooling for molded parts
- Engineering evaluation samples
- Pilot and production plastic components
Our accreditation from NSF provides assurance to our customers that our certified components and products comply with the technical requirements of ISO 9001.
QMMY2.E116158 Fabricated Parts – Component
Underwriters Laboratories is an independent product safety testing and certification organization working for public safety since 1894. Since its founding, U/L has held the reputation as the undisputed leader in product safety and certification, giving consumers peace of mind about the products they use.
("ITAR," 22 CFR 120-130) REGISTERED
All manufacturers of defense articles, related data, and defense services as defined on the United States Munitions List (Part 121 of ITAR) are required to register with the Directorate of Defense Trade Controls (DDTC). ITAR registration is a means to provide the U.S. Government with necessary information on who is involved in certain manufacturing, brokering, and exporting activities.
(MBP3)
Commitment to our air, land, and water quality is paramount at Ronningen. Since 1999, we've served as a Michigan Business Pollution Protection Partner, adopting pollution prevention policies, committing to reductions, and sharing our successes with other MBP3 members.
Our Comprehensive Manufacturing Services: Plastic Injection Molding & More
Assembly & Sub-Assembly
At Ronningen Research and Development, we provide expert Assembly & Sub-Assembly services for seamless integration of components. Whether it's simple assemblies or complex multi-part solutions, we ensure precision and efficiency in every process.
Custom Coloration
Our Custom Coloration services offer tailored color options to meet your design and branding needs. We use advanced Plastic Injection Molding techniques to ensure long-lasting, consistent colors for your products.
Custom Cutting Parts
Ronningen Research and Development specializes in Custom Cutting Parts using state-of-the-art machinery. We provide accurate cuts for a variety of materials, meeting the specific needs of your project.
Drilling
We offer high-precision Drilling services to create exact holes in various materials. Our advanced equipment ensures accuracy and quality for projects requiring tight tolerances and consistent results.
Electroplating
Our Electroplating services enhance part durability and corrosion resistance with high-quality metallic coatings. We provide superior finishes for applications in automotive, electronics, and more.
Heat Staking
Heat Staking at Ronningen Research and Development creates strong, reliable bonds between plastic components without the need for additional materials. This process is ideal for parts requiring secure assembly and durability.
Hot Stamping
Hot Stamping services provide a high-quality finish with precision and efficiency. We use advanced techniques to apply logos, designs, and text to parts, ensuring a clean and lasting imprint.
Insert Molding
Insert Molding allows us to mold plastic around metal or other materials to create strong, integrated components. This service provides enhanced functionality and durability for complex applications.
Labeling
We provide precise Labeling services that ensure clear, durable markings for traceability, branding, and compliance. Our labeling process guarantees that your parts are correctly identified and meet industry standards.
Leak Testing
Our Leak Testing services verify the integrity of your products, ensuring they meet safety standards. We provide airtight and watertight testing to prevent failures and guarantee quality.
Machining
We offer high-precision Machining services for custom parts. Using advanced CNC equipment, we deliver consistent, high-performance components for a variety of industries.
Milling
Our Milling services create intricate parts with high accuracy. We use advanced equipment to ensure precise cuts and finishes for your custom projects.
Over Molding
Over Molding at Ronningen Research and Development creates multi-material components for enhanced durability and functionality. We mold plastic over existing parts to meet complex design requirements.
Packaging, Custom
Our Custom Packaging services protect your products during transportation and storage. We offer tailored solutions to ensure your parts arrive safely and in excellent condition.
Pad Printing
We provide Pad Printing services for high-quality markings on various materials. Ideal for branding, labeling, and customization, our process ensures precise, durable prints.
Over Molding
Over Molding at Ronningen Research and Development creates multi-material components for enhanced durability and functionality. We mold plastic over existing parts to meet complex design requirements.
Packaging, Custom
Our Custom Packaging services protect your products during transportation and storage. We offer tailored solutions to ensure your parts arrive safely and in excellent condition.
Pad Printing
We provide Pad Printing services for high-quality markings on various materials. Ideal for branding, labeling, and customization, our process ensures precise, durable prints.
Part Marking
Our Part Marking services at Ronningen Research and Development ensure clear and accurate markings for identification and traceability. We use advanced techniques to apply markings that meet industry standards.
Painting
At Ronningen Research and Development, our Painting services enhance the aesthetic and protective qualities of your parts. We apply durable coatings for both functional and cosmetic purposes.
Silk-screening
We offer Silk-screening services at Ronningen Research and Development for durable, high-quality prints on parts. This process is ideal for logos, designs, and labels, providing precise results for a variety of materials.
Shielding
Our Shielding services at Ronningen Research and Development protect components from electromagnetic interference. We use advanced materials and techniques to ensure reliable performance and compliance with industry standards.
Shipping
At Ronningen Research and Development, we handle Shipping with care, ensuring that your products are securely packaged and delivered on time. Our reliable shipping services help you get your products to the market quickly and safely.
Spin Welding
Spin Welding services at Ronningen Research and Development provide strong, durable bonds for plastic parts. This technique is ideal for creating seamless joints without the need for additional materials.
Structural Foam Molding
We offer Structural Foam Molding at Ronningen Research and Development for lightweight, durable plastic parts. This service provides strong components with a reduced weight, ideal for applications that require high strength without the added bulk.
Taping
Our Taping services at Ronningen Research and Development are designed to provide secure adhesion and protection for your products. We offer custom taping solutions to meet the needs of various industries.
Trimming
At Ronningen Research and Development, we provide Trimming services to finish and refine your parts. Our precise trimming process ensures clean edges and perfect finishes for your molded components.
Ultrasonic Welding
Ultrasonic Welding at Ronningen Research and Development uses high-frequency sound waves to create strong, precise bonds between plastic parts. Ideal for delicate applications, this process ensures high-quality, durable results without the need for adhesives.
Frequently Asked Questions About Plastic Injection Molding in Detroit, MI
At Ronningen, we know that choosing the right manufacturing partner is essential for your success. To help you make an informed decision, we’ve answered some of the most frequently asked questions about our plastic injection molding services and capabilities. Whether you need prototypes or large-scale production, our team is here to provide the guidance and expertise you need.
Q1: What plastic injection molding services does Ronningen provide in Detroit?
Ronningen offers a full range of plastic injection molding services, including traditional injection molding, over molding, insert molding, and structural foam molding. We also provide secondary services such as machining, electroplating, pad printing, part marking, and custom packaging. These services help streamline production, reduce lead times, and ensure that your parts meet the highest quality standards.
Q2: Can Ronningen handle both small prototypes and large production runs?
Yes, Ronningen is fully equipped to handle both small-batch prototypes and large-scale production runs. Our flexible systems and advanced equipment allow us to quickly scale production to meet your needs, whether you need a few hundred parts or millions. We ensure consistent quality and precise results for every production volume.
Q3: How does Ronningen ensure the quality of molded parts?
We follow ISO 9001:2015 certified processes and use advanced inspection systems, including CMMs, vision cameras, and leak testers, to verify the quality and accuracy of each part. Our team conducts thorough quality control checks at every stage of production to ensure that each part meets your exact specifications and performs as required.
Q4: What types of materials does Ronningen work with for plastic injection molding?
Ronningen works with a variety of materials, including polypropylene, ABS, polycarbonate, and high-performance thermoplastics. We assist you in selecting the best material based on your part’s function, durability, and environmental requirements. Additionally, we offer custom coloration and blending services to match your part’s design and aesthetic needs.
Q5: Does Ronningen provide prototype injection molding services?
Yes, Ronningen specializes in prototype injection molding. Our rapid prototyping services allow you to test and refine your designs before committing to full-scale production. We work closely with you to ensure that the prototype meets your design and performance requirements, helping you save time and reduce the risk of errors during production.