Overmolding Services
Certifications ISO 9001:2015 | CTQ Inspections | ITAR
Get consistent, high-quality overmolded parts with our in-house overmolding services. Free DFM support and flexible mold solutions for any production volume.
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- 28M+parts shipped
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What Is Overmolding?
Overmolding is an advanced plastic injection molding process that combines two or more materials into a single, unified component. It typically involves molding a softer plastic material, such as thermoplastic elastomers (TPE), directly over a rigid plastic substrate to form a custom plastic part. Using multi-shot or insert molding, manufacturers can improve both function and appearance without extra assembly.
The overmolding process is widely used to improve ergonomics, durability, and product performance. Overmolding provides benefits such as a non-slip grip, vibration dampening, chemical resistance, and enhanced sealing.
Overmolding Process
Our insert molding and plastic overmolding services combine several different materials in fewer assembly steps, integrating other components into durable insert molded parts that reduce costs and improve performance.
Plastic over Plastic
A form of plastic overmolding, where a rigid parts is combined with a second material using two-shot molding. This makes two materials bond seamlessly for better color or performance.
Rubber over Plastic
Soft elastomers like TPE/TPU are molded over a rigid pre formed component. This creates durable insert molded parts with better grip, comfort, and sealing.
Plastic over Metal
A classic insert molding method, where metal inserts act as the core and are encapsulated with plastic. The secondary material adds strength and functionality.
Rubber over Metal
Another use of insert molding, where elastomers are bonded to metal inserts. This combination of two materials offers cushioning, slip resistance, and long-term durability.
Applications of Overmolding Services
Overmolding is applied in automotive, medical, electronics, and consumer products to combine materials, create unique designs with improved texture, and enhance overall performance.
Power Tool Handles
Durable grip surfaces molded over rigid frames for safety and comfort.
Medical Device Housings
Soft-touch surfaces for improved handling and patient comfort.
Electronic Enclosures
Overmolded seals and buttons for waterproof or dustproof performance.
Consumer Product Components
Kitchenware, toothbrushes, and sports equipment with ergonomic grips.
Automotive Interior Parts
Soft trims, knobs, and handles with integrated tactile finishes.
From Prototypes to Production
Ezra covers every stage of your overmolding process, from rapid prototyping to small batches and high volume production, offering an on-demand manufacturing tool, cost-effective solutions, and fast lead times.
Prototyping Injection Molding
We offer custom prototype services using 3D printing, CNC machining, and soft tooling. Quickly verify the design feasibility of your overmolding project.
- Quantity: 1-100 pcs
- Lead Time: 1-7 days
- Free Lifetime Tooling Maintenance
- Flexible prototyping with multiple methods
Low Volume Production
We offer overmolding services for low volume production, helping clients create functional prototypes and short-run parts with reduced costs.
- Quantity: 100–10,000 pcs
- Lead time: 3–5 weeks
High Volume Production
For high volume production, our overmolding services deliver consistent quality and efficiency, using durable tooling to produce millions of parts with reliable performance and cost advantages.
- Quantity: 10,000+ pcs
- Lead time: 4–7 weeks
- Competitive pricing for large orders
From First Upload to Final Part
Ezra combines engineering insight, rapid prototyping, and scalable production into one seamless custom injection molding service.
Secure File Handling
We protect your CAD files and drawings with strict confidentiality protocols. From NDA support to access-restricted project views, your intellectual property stays secure throughout the manufacturing process.
- NDA available upon request
- Encrypted file uploads
- Internal-access only policy
Designing for Manufacturability Report
Every project is reviewed by experienced engineers who provide free DFM and Moldflow reports. Get actionable insights to optimize part design before tooling begins.
- DFM + Moldflow review included
- Faster iterations, fewer tooling errors
- Early risk detection
Fast and Flexible Prototyping
Validate designs quickly with our rapid prototyping option, including 3D printing, CNC machining, and soft tooling, to accelerate every stage of the product development cycle.
- 3D print, CNC, or soft mold options
- Lead time as fast as 1–2 weeks
- Small-batch or one-off production
Factory Price at Scale
With in-house tooling and injection molding, we offer unbeatable pricing on high-volume orders. Get consistent quality control and global delivery without the middlemen.
- 100+ plastic material options
- Capacity for 10k+ parts/month
- Lower cost per part with volume
Our Overmolding Process
Request a Quote & DFM Review
Share your part design, receive a quote in 24h, and get a free DFM analysis.
Mold Design & Flow Simulation
We create your mold design and run mold flow analysis to optimize material flow, cooling, and part quality.
Tooling & T1 Sample
We begin tooling using premium-grade materials. T1 samples are delivered within 2–3 weeks for your inspection and approval.
Low-Volume Production
Once the sample is approved, we move into production — with full traceability, precision machining, and on-site QC inspection.
Final QA & Secure Delivery
Our QC team performs strict final inspections.
Parts are securely packaged and delivered worldwide through trusted logistics partners.
Industries We Serve
EzraMade’s clients come from multiple industries. Whether you produce medical devices, cars, or consumer goods, you'll find us to be a reliable injection molding partner. Our injection molding services are designed for ultimate predictability in costs and quality.
Customer-Authorized Cases
Custom Eyeshadow Palettes
A startup beauty brand used EZRA Made's injection molding. It cut lead times, costs, and improved part quality. EZRA Made did no-MOQ custom molding and rapid prototyping, from CAD to mold. After quick tooling, parts were injected and assembled. This brought fast production and short revision intervals.
Custom Cannabis Pre-Roll Packaging
Dive into our case study on eco-friendly pre-roll tubes for cannabis. Preserve freshness & elevate luxury—contact for custom cannabis packaging today!
Bicycle Bottle Cage Adapter
This custom-designed bottle cage adapter was 3D printed using black Nylon (PA12) via Selective Laser Sintering (SLS). The part showcases a lightweight lattice design optimized for strength and flexibility, ideal for aftermarket bike accessories. The fine surface texture and dimensional stability make it suitable for real-world outdoor use, ensuring reliable grip and performance under load.
Material: PA12 Nylon
Surface: As-printed, matte textured finish
Golf Club Head
This golf club head was part of a prototype project for a new player-focused design. The client sent the CAD file with a lattice-filled cavity. We printed it in stainless steel using DMLS. After two quick iterations, adjusting wall thickness and face weight, it was approved for swing testing. The whole process took under three weeks from file to functional part.
Dual-Shot Molded Counter Housing for Electronic Assembly
This electronic counter features a dual-color injection molded housing with integrated mounting structures for PCB and display components. Designed for handheld use, the part combines aesthetic surface finish with functional rigidity, enabling quick assembly and reliable performance in compact electronics.
Hybrid Globe Assembly with Metal-Plastic Integration
This custom globe combines precision-injected plastic and machined metal parts, with a clean USB-C charging port embedded in the base. The structure is designed for both visual appeal and durability, using multi-material assembly and post-finishing to ensure tight fit, surface alignment, and seamless rotation. A typical application of decorative product manufacturing with functional components.
Metal Home Decor
This piece was printed in stainless steel using DMLS, designed as a decorative object for modern interiors.
Precision CNC-Machined Tumbler for Double-Wall Drinkware
This stainless steel tumbler was CNC machined from dual-layer 304 stainless steel and finished with two distinct textures—satin brushing and snow-like bead blasting. Engineered to maintain consistent wall thickness for insulation and fluid aesthetics, the part showcases both functional precision and poetic design. The open-mouth shape and engraved bird detail reflect the client’s minimalist brand vision rooted in eastern elegance. ——Published with customer permission
Silicone-Overmolded Plastic Jar for Cannabis Packaging
This airtight container integrates a rigid transparent plastic body with a soft-touch silicone overmolded lid, designed for cannabis storage and retail packaging. The playful “drip” visual design is achieved through precision overmolding, ensuring brand recognition while maintaining seal integrity and user-friendly handling.
Aluminum Mounting Kit for Drone Cinematography
This CNC-machined aluminum accessory kit for DJI Mavic 4 Pro includes handheld grips, extension arms, and mounting brackets for professional aerial and handheld shooting. Each part is precisely milled for strength, lightweight handling, and modular compatibility with camera rigs and NATO rail systems. ——Published with customer permission
Anodized Aluminum Clamp for Folding Bike Assembly
This folding bike seat post clamp was CNC machined from aluminum alloy and finished with black anodizing and laser-etched markings. Designed for both durability and aesthetics, it features smooth contours and precision threads for easy locking and long-term outdoor use. ——Published with customer permission
Display Enclosure with Embedded Metal Inserts
This monitor housing was produced using insert molding, integrating metal fasteners directly into the injection-molded plastic shell. The result is a rigid, durable assembly that simplifies downstream installation and improves long-term structural integrity. Ideal for consumer electronics with high-precision assembly needs.
Multi-Tool Blades and Components for Outdoor Use
This stainless steel multi-tool features CNC-machined blades, saws, and pliers with brushed or sandblasted finishes for durability and corrosion resistance. Precision pivots and locking points ensure reliable deployment in camping, automotive, and emergency scenarios. ——Published with customer permission
Your Parts, Our Responsibility
Talk to our injection molding engineers to find out how we can meet your requirements.
Tell us about your project!
Overmolding FAQs
What are the advantages of the overmolding process？
Overmolding offers multiple advantages for product design and manufacturing. It enhances aesthetics with multi-color options and soft-touch grips, while also reducing costs by minimizing or eliminating secondary machining. At the same time, overmolded parts achieve greater durability and shock resistance since no extra connectors or fasteners are required. The process also ensures tight tolerances, resulting in higher accuracy and overall quality of the finished parts.
What are the differences between insert molding and overmolding services?
Insert molding and overmolding share similarities but serve different purposes. Insert molding encapsulates pre-formed components, often used in automotive and structural applications to enhance strength, compatibility, and protect metals from corrosion. Overmolding, on the other hand, focuses more on aesthetics and user experience by adding layers for texture, grip, or unique designs. Both processes require careful material selection and precise design to ensure quality and avoid molding defects.
What materials can be used for overmolding?
Overmolding typically combines a rigid base material with a softer overmold. Common substrates include ABS, PC, Nylon, PBT, and Polypropylene (PP), which provide strength and stability. For the overmold layer, flexible materials such as TPE, TPU, silicone rubber, or other elastomers are widely used to add grip, cushioning, or protective features. Material selection depends on the product’s performance requirements, ensuring both compatibility and durability.
