Expert Custom Plastic Injection Molding Services in Rockville, MD
Ronningen is a trusted leader in plastic injection molding and manufacturing services in Rockville, Maryland, with over 50 years of experience. We specialize in providing high-precision, custom-molded plastic components for industries such as medical devices, aerospace, automotive, and consumer electronics. Our facility is equipped with state-of-the-art injection molding technology, allowing us to efficiently handle projects of all sizes, from prototypes to large-scale production runs.
In addition to plastic injection molding, we offer a variety of secondary services including over molding, insert molding, machining, and ultrasonic welding. These capabilities allow us to deliver high-quality, durable parts that meet both functional and aesthetic requirements. Ronningen is committed to providing fast, reliable, and cost-effective manufacturing solutions that streamline production processes and meet the needs of businesses in Rockville.
Comprehensive Manufacturing Solutions for Rockville Industries
At Ronningen, we offer comprehensive plastic manufacturing services designed to support Rockville businesses. Our plastic injection molding capabilities include everything from traditional injection molding to more advanced processes like over molding, insert molding, and structural foam molding. We also offer secondary services such as machining, electroplating, custom cutting, and pad printing, ensuring that your parts meet both functional and aesthetic standards.
By handling all aspects of production in-house, we reduce lead times and minimize the need for multiple suppliers. This integrated approach helps us deliver high-quality, reliable parts with faster turnaround times and greater consistency. Whether you need prototypes or high-volume production runs, Ronningen provides flexible solutions tailored to your specific project needs.
Precision Plastic Manufacturing for Rockville’s Growing Industries
Ronningen leverages advanced technology and expert engineering to deliver precision plastic injection molding for businesses in Rockville. Our team uses high-tonnage machines and advanced molding techniques to produce high-quality parts with exacting tolerances. Whether you need multi-material components, intricate designs, or large-volume production, our facility is equipped to handle the most demanding projects.
In addition to molding, we provide value-added services like machining, leak testing, part marking, and packaging to deliver complete solutions. We are committed to providing the highest-quality results for every project, ensuring that your parts meet the standards of durability, performance, and functionality required in today’s industries.
Why Rockville, MD Manufacturers Choose Ronningen
Ronningen is the preferred choice for plastic injection molding and manufacturing in Rockville because of our comprehensive service offering and commitment to quality. We provide everything from precision molding and tooling to secondary services like machining, leak testing, and electroplating. Our team works closely with you to ensure that each part meets your functional, aesthetic, and performance requirements.
In addition to injection molding, we offer specialized services such as ultrasonic welding, structural foam molding, and spin welding. Our facility is equipped with high-precision machinery and experienced engineers who ensure your parts are produced accurately and on time. Ronningen’s integrated approach to manufacturing ensures faster production times, higher quality, and reduced costs.
Fast and Reliable Manufacturing Services for Rockville, MD
Ronningen’s facility in Rockville is designed to meet the fast-paced demands of local businesses that require quick, reliable plastic injection molding services. We understand the need for timely production, whether you’re working on a small prototype or scaling up for mass production. Our flexible systems and advanced equipment allow us to efficiently handle both small-batch and high-volume production runs without compromising quality.
We offer a full range of services, from mold design and manufacturing to packaging and shipping. Our team ensures that your parts are delivered on schedule, with the highest levels of precision and durability. With Ronningen, you can trust that your parts will be ready for use with minimal delays.
Ronningen R&D: Precision Plastic Injection Molding in Rockville, MD




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 Rockville, MD
At Ronningen, we receive many questions about our plastic injection molding services and how we can help businesses in Rockville, MD. Below are answers to the most common inquiries from local manufacturers looking to streamline their production and achieve high-quality results. We’re here to provide the information you need to make an informed decision about your manufacturing needs.
Q1: What types of plastic injection molding services does Ronningen offer in Rockville?
Ronningen offers a complete range of plastic injection molding services, including over molding, insert molding, and structural foam molding. Additionally, we provide secondary operations such as machining, electroplating, pad printing, part marking, and custom packaging. These services help us deliver fully finished parts that meet your functional, aesthetic, and quality standards.
Q2: Can Ronningen handle both prototypes and high-volume production runs?
Yes, Ronningen is equipped to handle both small-batch prototypes and large-scale production runs. Whether you need a few hundred parts or millions, our flexible equipment and experienced team ensure that every part is produced with the same level of precision and quality. Our ability to scale production means we can meet the demands of any project.
Q3: How does Ronningen ensure the quality of molded parts?
We follow ISO 9001:2015 standards and use advanced inspection technologies like CMMs, vision cameras, and leak testers to ensure the accuracy and quality of every part. Our experienced team conducts rigorous quality checks throughout the entire production process, ensuring that all parts meet your exact specifications and perform as required.
Q4: What types of materials can Ronningen work with for injection molding?
Ronningen works with a wide variety of materials, including commodity plastics like polypropylene and ABS, as well as high-performance resins for more demanding applications. Our team assists in selecting the best material based on your part’s requirements, including durability, temperature resistance, and regulatory compliance. We also offer custom coloration services to match your design specifications.
Q5: Does Ronningen provide prototype services for new product designs?
Yes, Ronningen specializes in prototype injection molding. We work closely with you to test designs, materials, and functionality before committing to full-scale production. Our prototyping services help identify potential issues early in the process, reducing costs and ensuring that the final product meets your performance and aesthetic requirements.