Plastic Injection Molding & Manufacturing Services in St. Louis, MO
Ronningen Research and Development specializes in high-quality plastic injection molding services for businesses in St. Louis, MO. Our advanced molding technologies enable us to produce durable, high-precision plastic parts for industries such as automotive, healthcare, electronics, and consumer goods. From the initial design and prototyping phase to large-scale production runs, we offer reliable and cost-effective solutions that meet your manufacturing needs. At Ronningen, we are committed to delivering products that exceed expectations in both quality and performance.
Our team works closely with businesses in St. Louis to streamline production processes, reduce lead times, and optimize costs. Whether you’re developing a prototype or scaling production, we ensure that every part is molded to the highest standards of precision, durability, and functionality. With our experienced team and state-of-the-art technology, Ronningen is the trusted partner for your injection molding needs.
Comprehensive Manufacturing Solutions for St. Louis’ Industries
Ronningen offers comprehensive plastic injection molding services for a variety of industries in St. Louis, MO, including automotive, medical, and electronics. Our solutions are designed to address the unique needs of each industry, from initial concept and mold design to final production. We are capable of producing both small and large runs, ensuring that every part is created with precision, efficiency, and high performance. Our services are fully scalable, so you can rely on us for all your production needs, regardless of the volume.
Our goal is to help businesses in St. Louis optimize their manufacturing processes by providing reliable, cost-effective, and high-quality molded parts. By using advanced technologies and materials, we ensure that every product we produce meets the highest industry standards. Whether you’re seeking to prototype a new part or need thousands of parts for mass production, Ronningen offers solutions that support your business’s success.
Precision Plastic Injection Molding for St. Louis, MO
At Ronningen, we focus on precision plastic injection molding for businesses in St. Louis, MO. Our state-of-the-art equipment and molding techniques ensure that every part is produced to tight tolerances, delivering consistent, high-performance results. Whether you need small, complex components or large, more robust parts, we can produce molded components that meet your exact requirements. Precision molding is essential for industries that demand high-quality, reliable components, and Ronningen’s capabilities guarantee that your parts perform to the highest standards.
We specialize in creating parts for industries that require high accuracy and durability. Our precision molding services are ideal for applications such as automotive components, medical devices, and consumer electronics. With Ronningen’s expertise, you can be confident that every molded part will meet your specifications and perform reliably in its intended application.
Why St. Louis, MO Manufacturers Choose Ronningen
Manufacturers in St. Louis, MO, choose Ronningen Research and Development for our extensive experience, advanced molding technologies, and commitment to delivering high-quality molded parts. With over 50 years of experience in the industry, we offer scalable solutions for businesses of all sizes. Our expert team works with you from start to finish, ensuring that every project is executed on time and within budget. Whether you need prototypes, custom molds, or high-volume production, we are dedicated to providing reliable, cost-effective solutions that meet your manufacturing needs.
Ronningen is the preferred choice for St. Louis manufacturers because we deliver precision, quality, and efficiency in every project. Our ability to handle both small and large production runs makes us a flexible partner, and our dedication to customer satisfaction ensures that we consistently meet and exceed expectations. We provide the best possible results for every client, no matter the size of the project.
Fast, Reliable Plastic Injection Molding Solutions for St. Louis, MO
At Ronningen, we understand that businesses in St. Louis, MO, need fast and reliable plastic injection molding solutions to stay competitive. We offer efficient, quick-turnaround services without compromising on quality. Our team utilizes advanced injection molding technologies to ensure that your parts are produced on time, every time. Whether you need a few custom parts or thousands for mass production, we ensure that your production timelines are met and your quality standards are upheld.
Ronningen is committed to providing fast, dependable manufacturing solutions that meet the needs of businesses in St. Louis. Our flexible, scalable services ensure that you can quickly ramp up production when necessary, while maintaining the highest levels of precision and reliability in every part we produce.
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 St. Louis, MO
Plastic injection molding is one of the most efficient and widely-used manufacturing processes, but businesses in St. Louis, MO, may still have questions about how it works. At Ronningen, we aim to provide clarity on every aspect of the process. From material selection to mold design and production schedules, our team is here to help you navigate the complexities of injection molding. We offer expert guidance to ensure that your project is executed efficiently, meeting all your production needs.
Ronningen’s experts are dedicated to answering all your questions and ensuring that you are fully informed about the injection molding process. Whether you’re just starting out or have extensive experience with injection molding, we offer personalized solutions to help you achieve optimal results for your manufacturing project.
What materials are used in plastic injection molding?
Plastic injection molding uses various materials, including thermoplastics such as ABS, polycarbonate, and polypropylene. The material selected depends on the desired properties of the part, such as strength, flexibility, and heat resistance. Ronningen helps clients choose the right material to ensure optimal performance and durability for their molded parts.
How do you ensure the quality of molded parts?
At Ronningen, we employ strict quality control measures to ensure that every molded part meets the highest standards. We conduct in-process inspections, use automated vision systems, and perform post-production testing to verify that parts are free of defects. Our commitment to quality ensures that every part we produce is reliable, durable, and meets the required specifications.
What industries use plastic injection molding?
Plastic injection molding is widely used in industries such as automotive, medical, electronics, and consumer goods. It is ideal for producing parts that require durability and precision, including housings, connectors, gears, and medical devices. The process’s ability to produce high-volume parts consistently and accurately makes it ideal for a variety of industries.
How much does plastic injection molding cost?
The cost of plastic injection molding depends on several factors, such as part complexity, material choice, mold design, and production volume. While the initial mold setup can be costly, the per-part cost typically decreases with higher production volumes. Ronningen offers competitive pricing, ensuring cost-effective solutions that balance quality and efficiency.
Can Ronningen handle both small and large production runs?
Yes, Ronningen is equipped to handle both small, custom production runs and large-scale manufacturing. We offer flexible solutions for businesses of all sizes, whether you need a few parts for prototypes or thousands for mass production. Our advanced molding technology ensures that every project is completed efficiently, regardless of size.