Plastic Injection Molding & Comprehensive Manufacturing Solutions in Minneapolis, MN
Ronningen is proud to offer premium plastic injection molding and manufacturing services to businesses in Minneapolis, Minnesota. With over 50 years of expertise, we specialize in producing precision-molded plastic parts for a wide variety of industries, including automotive, aerospace, medical devices, and consumer electronics. Our state-of-the-art facility uses the latest injection molding technology, allowing us to efficiently manage projects of all sizes, whether they are small prototype runs or large-volume production.
In addition to injection molding, Ronningen provides a full range of secondary services, including over molding, insert molding, ultrasonic welding, electroplating, and pad printing. These services ensure that we can deliver fully finished parts that meet your design and performance specifications. We are dedicated to providing fast, reliable, and cost-effective manufacturing solutions to businesses in Minneapolis, ensuring top-quality production and timely delivery of your components.
Complete Plastic Manufacturing Solutions for Minneapolis Industries
At Ronningen, we offer a wide range of plastic manufacturing services tailored to meet the diverse needs of businesses in Minneapolis. Our plastic injection molding services are designed to meet the highest quality standards, providing solutions for everything from prototypes to large-scale production runs. Whether you need traditional injection molding, over molding, or insert molding, we provide precision molding with materials ranging from commodity plastics to engineered resins for high-performance applications.
We also offer a variety of secondary services such as machining, electroplating, pad printing, and custom packaging. By performing these services in-house, we are able to reduce lead times and ensure that each part is produced to your exact requirements. Our integrated approach ensures that your parts meet all functional and aesthetic standards while helping you streamline production and reduce costs.
Precision Plastic Manufacturing and Expert Engineering for Minneapolis, MN
Ronningen is committed to delivering high-precision plastic injection molding services for businesses in Minneapolis, MN. Our advanced injection molding machines range from 25 tons to 1100 tons, providing the flexibility to handle both small, intricate parts and large, high-volume production runs. We use cutting-edge molding technology to create parts with the highest precision and accuracy, ensuring that each part meets your functional, dimensional, and performance requirements.
In addition to traditional injection molding, we offer specialized services such as ultrasonic welding, spin welding, and structural foam molding, which provide added strength, lightweight properties, and enhanced performance. Our in-house machining, milling, and leak testing capabilities ensure that each part is produced with exceptional quality and reliability. By offering all of these services under one roof, we help you reduce production time, lower costs, and improve efficiency, making Ronningen the ideal manufacturing partner in Minneapolis.
Why Minneapolis, MN Manufacturers Choose Ronningen
Ronningen is the trusted partner for Minneapolis, MN manufacturers because we offer a comprehensive range of services that cover every aspect of plastic injection molding and manufacturing. Our team works closely with clients from concept to completion, offering services that include precision molding, over molding, insert molding, and structural foam molding. We also offer additional services such as machining, electroplating, leak testing, and custom packaging to ensure that every part is ready for use upon delivery.
With over 50 years of experience, we understand the demands of industries like automotive, aerospace, medical devices, and consumer electronics. Our in-house capabilities allow us to simplify your supply chain, reduce lead times, and minimize the number of suppliers involved, ensuring consistent quality and timely delivery. Ronningen’s commitment to quality and customer satisfaction has made us a trusted partner for Minneapolis manufacturers, helping them bring innovative products to market faster and more efficiently.
Fast, Reliable Plastic Injection Molding Solutions for Minneapolis, MN
Ronningen’s Minneapolis facility is designed to meet the fast-paced demands of local businesses requiring high-quality plastic injection molding services. We understand that quick turnaround times are critical, especially when working with prototypes or on tight schedules. Whether you need rapid prototyping or large-volume production, we have the technology and expertise to produce your parts efficiently without sacrificing quality.
We also offer secondary services such as machining, leak testing, part marking, and packaging, all performed in-house to streamline the production process. By handling every aspect of production under one roof, we reduce complexity and improve efficiency, ensuring that your parts are delivered on time and meet your exact specifications. Ronningen is committed to delivering reliable, fast, and high-quality manufacturing solutions that help businesses in Minneapolis meet their production goals.
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 Minneapolis, MN
At Ronningen, we frequently receive questions from businesses in Minneapolis, MN, about our plastic injection molding services. To help you make an informed decision about your manufacturing needs, we’ve answered some of the most common questions. Whether you’re new to plastic molding or looking to scale up production, our team is here to provide the information you need to ensure the success of your project.
Q1: What types of plastic injection molding services does Ronningen provide in Minneapolis?
Ronningen offers a wide range of plastic injection molding services, including traditional molding, over molding, insert molding, and structural foam molding. We also provide secondary services such as machining, leak testing, electroplating, pad printing, and custom packaging. These services help streamline production, reduce lead times, and ensure that your parts meet both functional and aesthetic standards.
Q2: Can Ronningen handle both small prototypes and high-volume production?
Yes, Ronningen is fully equipped to handle both small-batch prototypes and large-scale production runs. Our advanced equipment and flexible systems allow us to efficiently scale production to meet your needs, 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 certified quality management processes, utilizing advanced inspection systems like CMMs, vision cameras, and leak testers to verify the quality and accuracy of every part. Our team conducts rigorous quality checks at every stage of production to ensure that all parts meet the required specifications and perform as expected.
Q4: What materials does Ronningen use 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 for your part based on its functional requirements, performance specifications, and environmental conditions. We also offer custom coloration services to match your specific design needs.
Q5: Does Ronningen provide prototype injection molding services?
Yes, Ronningen specializes in prototype injection molding. Our rapid prototyping services allow you to test your designs, materials, and dimensions before committing to full-scale production. This helps identify potential issues early in the process, reducing risks and saving time and money during production.