Premier Plastic Injection Molding Services in Baltimore, MD
Ronningen is proud to be a leader in plastic injection molding and manufacturing services in Baltimore, Maryland, with more than 50 years of experience. We specialize in producing high-precision, custom-molded plastic parts for industries such as medical devices, consumer electronics, automotive, and aerospace. Our advanced manufacturing facility is equipped with the latest injection molding technology, which allows us to efficiently handle both small prototype batches and large-scale production runs. We ensure that each part we produce is of the highest quality, meeting or exceeding your specifications.
Beyond plastic injection molding, Ronningen offers additional services to meet your diverse needs. These include over molding, insert molding, and ultrasonic welding, as well as secondary operations such as machining, electroplating, and part marking. These services, performed in-house, reduce lead times, improve efficiency, and ensure you receive fully finished parts ready for use. Ronningen is committed to delivering reliable, cost-effective solutions for manufacturers in Baltimore.
Comprehensive Manufacturing Solutions for Baltimore’s Industries
At Ronningen, we provide a wide range of plastic manufacturing services designed to support businesses in Baltimore. We specialize in custom plastic injection molding, over molding, and insert molding, ensuring that each part we produce meets both functional and aesthetic requirements. Our team works with a variety of materials, including engineered resins and thermoplastics, to produce durable, high-performance parts that are designed to perform under demanding conditions.
In addition to our molding services, we offer several secondary operations that help streamline your production process and enhance the functionality of your parts. These services include electroplating, machining, custom cutting, leak testing, and pad printing. All of these services are completed in-house, reducing lead times and eliminating the need for multiple suppliers. Whether you’re looking for small-batch prototyping or high-volume production, Ronningen provides efficient, high-quality solutions that meet your specific manufacturing needs.
Precision Molding and Comprehensive Manufacturing for Baltimore
Ronningen is dedicated to providing Baltimore businesses with the highest-quality plastic parts and components. Our team uses high-tonnage machines and advanced molding technology to deliver precision-molded parts for a wide range of industries. Whether you require multi-material parts, intricate geometries, or high-strength components, Ronningen has the expertise and equipment to meet your needs. We offer specialized services like spin welding, structural foam molding, and ultrasonic welding, ensuring that your parts are not only functional but also durable and reliable.
Our in-house capabilities extend beyond molding to include machining, milling, and custom cutting, which ensures that each part is produced to the highest specifications. We also offer packaging, labeling, and shipping services to ensure that your parts are delivered on time and ready for use. Ronningen’s advanced systems and skilled team ensure your parts are made to last while meeting your deadlines and budget.
Baltimore, MD’s Leading Plastic Injection Molding Experts
Ronningen is the go-to partner for Baltimore manufacturers because we offer a comprehensive, integrated approach to plastic injection molding and manufacturing. We provide a wide range of services, from precision molding and tooling to secondary operations such as machining, electroplating, and custom packaging. Our experienced engineers work closely with you to optimize material selection and part design, ensuring that each part meets your exact specifications and performance requirements.
We specialize in advanced molding techniques, including over molding, insert molding, and structural foam molding, which allow us to handle complex parts and multi-material designs. Additionally, we offer services like leak testing, pad printing, and part marking to add value to your components. By offering all of these services in-house, Ronningen simplifies your production process, reducing lead times and minimizing risks associated with multiple suppliers. Baltimore manufacturers trust us for our ability to provide high-quality parts, reliable delivery, and cost-effective solutions.
Fast and Reliable Manufacturing Solutions for Baltimore, MD
Ronningen’s facility in Baltimore is equipped to meet the needs of local businesses requiring fast, efficient, and high-quality plastic injection molding services. Whether you’re working on a prototype, low-volume production run, or scaling up for large-scale manufacturing, we offer flexible solutions that meet your production needs. Our team ensures that your parts are delivered on time and meet the highest quality standards, regardless of your production volume.
Our in-house capabilities, including machining, custom cutting, packaging, and shipping, enable us to handle all aspects of your production process. This integrated approach reduces the need for multiple vendors and simplifies the entire process, from design to delivery. With Ronningen, you can trust that your parts will be produced quickly, accurately, and efficiently.
Custom Plastic Injection Molding Solutions in Baltimore, 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 Baltimore, MD
At Ronningen, we understand that choosing the right manufacturing partner is critical for your success. That’s why we’ve compiled answers to some of the most frequently asked questions from businesses in Baltimore, MD. Whether you’re new to plastic injection molding or looking for a reliable partner to scale production, we are here to provide you with the answers and support you need.
Q1: What services does Ronningen provide for plastic injection molding in Baltimore?
Ronningen offers a comprehensive range of plastic injection molding services, including standard injection molding, over molding, and insert molding. We also provide secondary services such as machining, leak testing, electroplating, and pad printing. Our team works closely with you to ensure that every part meets your functional and aesthetic requirements, whether you’re working on prototypes or mass production.
Q2: Can Ronningen handle both small-batch prototypes and large-scale production?
Yes, Ronningen can handle both small-batch prototypes and large-scale production. We offer flexible manufacturing solutions that scale to meet your needs. Whether you need a few hundred parts for testing or millions for full-scale production, our advanced equipment and skilled team ensure that every part is produced to the highest quality standards.
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 ensure that every part meets exact specifications. Our quality control measures are in place throughout the production process, ensuring that each part is checked for precision, durability, and performance.
Q4: What materials can Ronningen use for injection molding?
Ronningen works with a wide variety of materials, including polypropylene, ABS, polycarbonate, and high-performance thermoplastics. Our team can assist you in selecting the right material for your part, based on its performance requirements, environmental exposure, and budget. We also offer custom coloration services to match your specific design needs.
Q5: Does Ronningen offer prototype injection molding services?
Yes, Ronningen specializes in prototype injection molding. We offer fast-turn prototyping services to help you validate your designs and test the functionality of your parts before full-scale production. Our prototyping services allow for design refinement, material testing, and performance validation, ensuring that your final product meets all requirements.