Box-Build Custom Plastic Injection Molding
Our Skilled Capabilities in Box-Build Plastic Injection Molding
For manufacturers who prioritize quality above everything else, we offer end-to-end custom plastic injection molding services. Our expertise spans a wide range of products, from medical devices to consumer electronics and telecommunications solutions. Partner with us for results-driven custom manufacturing services.
Scalable Production
Turnkey Services
Entrust your conceptualization and production to us, and we will bring absolute precision to every mold.
Custom Mold Design and In-House Builds
All products manufactured by our US-based facility surpass rigorous quality benchmarks and demonstrate high performance.
Quality Assurance
Custom Injection Molding and In-House Box-Build Capabilities
As your partner in custom plastic injection molding services, MFG One has the expertise, technology, and global reach to set your product up for success. We’re ready to deliver high-quality, cost-effective contract manufacturing services on time and within budget.
- 25 injection molding presses ranging from 50 to 550 tons.
- Multi-shot and rotary table presses for high-precision, high-volume production.
- Vertical and horizontal presses offer flexibility for a variety of production requirements.
- Insert molding and over-molding for creating complex parts with multiple materials.
- Prototype single cavity mold fabrication to rapidly create and test designs before full production.

Expansive Material Selection
At MFG One, we know that the right material can make all the difference in your product’s success. As part of our plastic injection molding services, we work with you to select the best materials based on your product’s specific needs.
We offer a wide range of resins including:
- Nylon
- Polycarbonate
- ABS
- PC/ABS
- TPE
- Acrylic
- Acetal
- Polypropylene
- More…
High-Accuracy Manufacturing for Complex Designs
We comply with exact specifications in industries such as medical, biotechnology, and electronics, where safety and efficiency are the highest priorities.
- Custom molds for complex geometries, undercuts, and threads
- Custom plastic injection molding to meet exacting standards
- Expertise in creating and handling intricate designs
Rapid Prototyping
Our reverse engineering services and advanced tooling capabilities, including multi-cavity and hot runner molds, enable high production accuracy from the start.
- Quick-turn prototyping services
- Expert design services for rapid product development
- Agile response to design changes
On-Demand Support
Our custom plastic injection molding experts provide unique insights into the conceptualization phase of the final delivery of products.
- A dedicated team of master tool technicians
- Personalized support for each project
- Continuous quality monitoring and improvement
Scalability and Value-Added Services
We don’t stop at production. MFG One provides comprehensive aftermarket manufacturing and 3PL services to fully support your products after they leave the mold. From assembly to packaging and shipping, we offer everything you need to get your products to market efficiently and cost-effectively.
- With our turnkey solutions, you can count on us to provide end-to-end support, making the transition from design to market as smooth as possible.
High-Quality Injection Molding and Tooling Solutions
With a dedicated team of experts and custom plastic injection molding services, MFG One helps you bring your designs to life-quickly, efficiently, and with uncompromised quality. Whether you’re prototyping or moving into full-scale production, our facility is equipped to meet your needs at every stage.
OEM Manufacturing Solutions
As a leading contract manufacturer in the United States for electronics manufacturing services (EMS), we provide dedicated support in design, prototyping, fabrication, assembly, and logistics to deliver fully integrated products. Our full range of original manufacturing services covers:
- Diverse Manufacturing Processes: Plastic injection molding services, precision mold tooling, metal fabrication, and structural steel components.
- Capabilities: Streamlined processes, high-quality components, and seamless integration of electronics.
Serving Industries Worldwide
We provide specialized OEM support to medical equipment, telecommunications, defense, industrial automation, consumer electronics, and renewable energy sectors across the US, the UK, Canada, Mexico and beyond.
- Unparalleled Efficiency: We partner with our clients to drive tangible results, leveraging our expertise to optimize their manufacturing processes, reduce costs, and accelerate time to market.
- Engineering Excellence: Right from design and prototyping to manufacturing and testing, our manufacturing support services are customized to your specifications.

Our Rigorous Injection Molding Process Quality Control
As a trusted turnkey electronic manufacturer, MFG One adheres to the highest industry standards and certifications. We are ISO 13485 certified and FDA registered, which makes sure that our plastic injection molding services meet the most stringent regulatory requirements.
In-Process Validation (IQ, OQ, PQ)
We conduct rigorous IQ, OQ, and PQ validations before production begins so that our equipment, processes, and systems are properly installed (IQ), operating within specified parameters (OQ), and consistently producing parts that meet all quality requirements (PQ).
In-Process Validation (IQ, OQ, PQ)
In-Process Quality (IPQ) During Production
During production, we maintain continuous quality control through In-Process Quality (IPQ) checks, monitoring key parameters and performing inspections to identify and address any deviations immediately to make sure the consistent product quality.
In-Process Quality (IPQ) During Production
cGMP Compliance
Our experienced quality control team follows cGMP guidelines, meticulously inspects every aspect of production. Through these validations, you are confident that your product meets all specifications.
cGMP Compliance

MFG One’s Expertise in Turnkey Core Manufacturing Support Services

Our box-build manufacturing services are designed to carry out high-volume production and specialized assembly to build product specifications.
- PCB Assembly: As an end-to-end box-build assembly manufacturer, we handle every stage from prototyping to full-scale production.
- Rigorous Testing and Quality Assurance: Functional testing, In-Circuit Testing (ICT), boundary scan, and burn-in testing.
- Turnkey Box Build Services: Turnkey PCB manufacturing integrating PCBs with enclosures and components for finished products.

As a custom turnkey manufacturer we produce expertly crafted molds and high-quality plastic components, delivering accuracy, reliability, and consistent performance for your products.
- 25 Injection Molding Presses (50-550 Tons): Supporting both small and large production runs.
- Insert and Over-Molding: Ideal for complex, multi-material parts.
- Multi-Shot and Rotary Presses: Precision molding for high-volume production.

With design, maintenance, and advanced tooling capabilities, our custom plastic injection molding and tooling solutions optimize your manufacturing processes.
- High-Volume Tooling Capacity: 30-50 tools in parallel for efficient production.
- Rapid Prototyping and Expert Design: Quick-turn prototype tools developed by highly skilled master tool technicians.
- Full-Service Support: Maintenance, hot runner systems, and full-service tooling solutions.

We deliver high-quality metal fabrication solutions using advanced manufacturing techniques and rigorous quality control to create enclosures and outer structures for your products.
- Custom Fabrication: Personalizing metal parts and assemblies for durability and performance.
- Advanced Manufacturing: CNC machining, laser cutting, and welding.
- Quality and Consistency: Strict inspections and process controls.
Empowering Industries with Turnkey Solutions
Our Custom Plastic Injection Molding Process
High-Performance Plastic Injection Molding Built for Your Needs
As a leading contract manufacturer in the USA and beyond, MFG One’s custom plastic injection molding services are trusted by clients across the globe. With our facility strategically located in Chantilly, VA, we serve customers both nationally and internationally, including the US, Canada, the United Kingdom, and Mexico.
Wherever your business is located, you can expect the same level of quality, precision, and customer service that makes MFG One a leader in the industry.
Contact us today or request a quote to get started!