Premier Plastic Injection Molding Services in Ann Arbor, MI
Ronningen is a trusted provider of high-quality plastic injection molding and manufacturing services in Ann Arbor, Michigan. With over 50 years of experience, we specialize in delivering precision-molded plastic parts for various industries, including medical devices, automotive, aerospace, and consumer electronics. Our advanced facility is equipped with the latest injection molding technology, enabling us to efficiently handle everything from prototype development to high-volume production.
In addition to plastic injection molding, we offer a wide range of secondary services, such as over molding, insert molding, machining, and ultrasonic welding. These services help streamline production, reduce lead times, and ensure the highest quality for your parts. Ronningen is committed to providing reliable, cost-effective solutions that meet your manufacturing needs in Ann Arbor.
Complete Manufacturing Solutions for Ann Arbor’s Industries
Ronningen offers comprehensive plastic manufacturing services tailored to meet the specific needs of businesses in Ann Arbor. We provide a full range of plastic injection molding services, including over molding, insert molding, and structural foam molding, allowing us to produce high-quality parts with exceptional performance and durability. Whether you need prototypes or large production runs, our team ensures that every part is produced with precision.
Our in-house capabilities extend to machining, leak testing, pad printing, part marking, and custom packaging, all designed to improve efficiency and reduce lead times. By offering all of these services under one roof, Ronningen streamlines your production process and reduces the complexity of your supply chain. Our integrated approach helps businesses in Ann Arbor achieve consistent, high-quality results.
Precision Molding and Expert Engineering for Ann Arbor, MI
Ronningen provides precision plastic injection molding services for businesses in Ann Arbor, utilizing high-tonnage machines and advanced molding technology. Whether you need complex parts or large-volume production, we have the expertise and equipment to deliver high-quality results. Our services include ultrasonic welding, spin welding, and structural foam molding, which help ensure that your parts are both strong and lightweight.
In addition to molding, we offer secondary services like machining, milling, and custom cutting, all of which are performed in-house to guarantee accuracy and efficiency. Ronningen’s integrated manufacturing solutions reduce the need for multiple suppliers and streamline production, ensuring faster lead times and improved product consistency.
Why Ann Arbor, MI Manufacturers Choose Ronningen
Manufacturers in Ann Arbor, MI trust Ronningen for plastic injection molding and manufacturing solutions because of our comprehensive service offerings and commitment to quality. From mold design and tooling to secondary services like machining and electroplating, we manage every aspect of production to ensure high-quality results. Our team of engineers works closely with clients to optimize part designs and material selection, ensuring that each component meets exact specifications.
In addition to traditional molding, we specialize in over molding, insert molding, and structural foam molding, which allows us to produce multi-material and complex parts. We also provide leak testing, part marking, and packaging to deliver fully finished parts that are ready for use. Ronningen’s integrated approach helps reduce costs, improve efficiency, and streamline your manufacturing process.
Reliable and Efficient Plastic Manufacturing Solutions for Ann Arbor, MI
Ronningen’s facility in Ann Arbor is designed to meet the fast-paced demands of local manufacturers requiring high-quality plastic injection molding services. We understand the importance of fast, reliable production, especially for industries with tight deadlines. Whether you’re working on prototypes, low-volume production runs, or large-scale manufacturing, Ronningen’s advanced equipment and skilled team can handle it all.
We offer in-house machining, leak testing, part marking, packaging, and shipping services, all designed to simplify your production process and reduce delays. Our integrated approach ensures that your parts are produced efficiently and delivered on time. Ronningen is here to provide high-quality, cost-effective manufacturing solutions for your business in Ann Arbor.
Our Certifications




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 Ann Arbor, MI
At Ronningen, we understand that selecting the right manufacturing partner is crucial to your success. To help you make an informed decision, we’ve answered some of the most frequently asked questions from businesses in Ann Arbor, MI. Our goal is to provide clarity and support as you navigate your manufacturing needs, and we’re always here to help.
Q1: What types of plastic injection molding services does Ronningen provide in Ann Arbor?
Ronningen offers a full suite of plastic injection molding services, including traditional injection molding, over molding, and insert molding. We also provide secondary services such as machining, electroplating, pad printing, part marking, and packaging. Our team ensures that each part meets your functional, aesthetic, and quality requirements, streamlining your production process and reducing lead times.
Q2: Can Ronningen handle both small prototypes and large production runs?
Yes, Ronningen is equipped to handle both small-batch prototypes and high-volume production runs. Our flexible equipment and skilled team allow us to scale production efficiently, ensuring that each part is produced with the same level of precision and quality, whether you need a few hundred parts or millions.
Q3: How does Ronningen ensure the quality of molded parts?
We follow ISO 9001:2015 standards for quality management and use advanced inspection systems, including CMMs, vision cameras, and leak testers, to ensure that each part meets your exact specifications. Our quality control team conducts rigorous checks at every stage of production to ensure that all parts meet the highest quality standards.
Q4: What materials does Ronningen use for plastic injection molding?
Ronningen works with a wide range of materials, including polypropylene, ABS, polycarbonate, and high-performance thermoplastics. Our team helps you choose the right material for your part’s functional requirements, performance specifications, and environmental needs. We also offer custom coloration services to match your design and aesthetic preferences.
Q5: Does Ronningen offer prototype injection molding services?
Yes, Ronningen specializes in prototype injection molding, helping you test and refine your designs before committing to full-scale production. Our rapid prototyping services allow you to evaluate materials, dimensions, and functionality early in the process, reducing the risk of errors and saving time and money.