Why Choose Our Over Molding Services for Plastic Parts?
- Durable, Multi-Material Components
- Complex Part Integration
- Efficient Production
Precision Plastic Injection Molding & Overmolding Services
At Ronningen Research & Development, we provide plastic injection molding and over molding services that produce high-quality, durable parts with exceptional precision. Whether you need complex molded components for automotive, medical devices, consumer electronics, or industrial applications, our advanced molding technologies ensure reliable performance and cost-effective production. We specialize in over molding, where two or more materials are bonded together to create multi-material components with enhanced strength, flexibility, and functionality. With over 50 years of experience, we offer both small-volume and high-volume molding solutions, ensuring flexibility for rapid prototyping and large-scale production. Our team of engineers works closely with you to optimize designs and choose the right materials, guaranteeing optimal part performance across a variety of industries.
Why Choose Our Injection Molding & Over Molding Services
High-precision molding for complex geometries
Multi-material over molding for enhanced functionality
Insert molding for stronger plastic-to-metal bonds
Custom tooling to fit your design needs
Scalable solutions for both small and large runs
Advanced material options for specialized performance
Call Us Today to Schedule a Free Consultation
How We Optimize Your Molding Process
Our plastic injection molding and over molding services are designed to provide superior part strength, functionality, and material performance. We work closely with clients to ensure that the right materials and processes are selected for each project, optimizing both the production process and final part quality. Whether your needs include multi-component assemblies or single-material molded parts, we have the expertise to deliver results that meet the highest standards of quality.
Plastic Injection Molding:
We use cutting-edge injection molding machines and automation to create complex, high-precision plastic parts. This service is ideal for producing parts with intricate shapes, thin walls, and tight tolerances.
Over Molding:
Over molding allows us to combine multiple materials into one finished part, such as adding a soft touch or grip surface to a hard plastic base. This technique improves product functionality, aesthetics, and durability.
Insert Molding:
Insert molding integrates metal or other components directly into plastic parts during the injection molding process. This is ideal for parts that require mechanical strength and reliability, such as electrical connectors and automotive components.
Custom Tooling & Design:
Our team of engineers specializes in designing custom molds and tooling for your specific part requirements. This ensures the highest accuracy and cost-efficiency in mass production.
Enhance Your Production with Ronningen’s Molding Expertise
Get high-quality, precision plastic injection molding and over molding services with Ronningen Research & Development. Whether you’re prototyping a new design or scaling up to full production, our team offers customized molding solutions that ensure part functionality and cost-efficiency. Contact us today to learn how we can streamline your manufacturing process and deliver reliable, high-performance parts that exceed your expectations.
Frequently Asked Questions About Plastic Injection Molding & Over Molding
Clients frequently ask how plastic injection molding and over molding services can improve part quality and reduce costs. These FAQs cover our molding processes, material options, and capabilities, optimized for both search engines and voice assistants.
1. What is plastic injection molding?
Plastic injection molding is a manufacturing process where plastic material is melted and injected into a mold cavity to create parts with complex shapes and high precision. It’s ideal for producing high-volume, detailed components.
2. What is over molding and how is it used?
Over molding involves molding a second material over a base plastic part to create a multi-material component. This process adds additional functionality, such as improving grip, adding color, or increasing strength and flexibility.
3. Can Ronningen handle low-volume production?
Yes. We offer both low-volume and high-volume production runs for plastic injection molding and over molding projects. Whether you’re testing prototypes or scaling for mass production, we offer flexible solutions to meet your needs.
4. What industries can benefit from your molding services?
Our injection molding and over molding services support a wide range of industries including automotive, medical devices, consumer electronics, aerospace, and telecommunications, where precision and reliability are essential.
5. Where are your molding services available?
Ronningen Research & Development provides plastic injection molding and over molding services across the United States. We also offer international shipping and logistical support to ensure your parts are delivered on time, every time.
Our Active 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.
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.
