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Rapid Prototyping
High-Volume Production
High-Quality Overmolding: Seamless Bonding for Multi-Material Parts
JS offers quick, tailored quotes for overmolding projects, with a broad material selection, advanced surface treatments, and high-precision molding. Get a custom price in minutes for your multi-material parts.
90+ Materials: Thermoplastics (ABS, TPE, PC) and substrates (PP, nylon, metal) for strong, functional bonds.
20+ Surface Finishes: Enhance appearance and functionality with options like soft-touch coatings and texturing (3-5 days lead time).
Precision (±0.02mm): Ensure perfect material integration with tight tolerances.
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ITAR Registered
ISO 9001:2015,ISO 13485:2016,AS9100D and lATF 16949:2016 Certified
Trusted by Engineers and Purchasing Leaders at the World’s Most Successful Companies
Overmolding
JS delivers advanced overmolding services to create durable, multi-material components that boost both functionality and aesthetics. With our ISO 9001:2015 certification, we ensure precise bonding, excellent adhesion, and long-term durability. Whether you're working on prototypes, custom applications, or high-volume runs, our expert team helps you choose the best materials to achieve optimal results. We’re committed to providing quick, reliable, and cost-efficient solutions for all your overmolding needs.

Service
Product Showcase
Our overmolding services bond multiple materials to create durable, functional, and visually appealing parts. Designed for superior grip and performance, each overmolded component excels in demanding applications.
Tolerances
At JS, our overmolding services are designed for precision, with tolerances ranging from ±0.01 mm to ±0.05 mm. This level of accuracy ensures that multi-material components are bonded seamlessly, providing both enhanced performance and durability for critical applications.
Feature
Description
Maximum Part Size
1200×1000×500 mm
Minimum Part Size
5×5×5 mm
Part to Part Repeatability
+/- 0.1 mm
Mold Cavities
Single-cavity molds, multi-cavity molds, family molds
Available Mold Types
Steel and aluminum molds. Production levels below 1000, 5000, 30000, and over 100000 uses
Mold Cavity Tolerances
+/- 0.05 mm
Secondary Operations
Mold texturing, pad printing, laser engraving, threaded inserts, and basic assembly
Undercuts
Y-type, L-type undercuts
Wall Thickness
0.5 mm to 5 mm
Draft
0.5° to 2°
Ribs/Gussets
0.5 mm to 3 mm thick
Bosses
Diameter 3 mm to 10 mm
Production Options
Domestic and international
Lead Time
Starts at 5 business days, including fast quote responses with design-for-manufacturing (DFM) feedback
Materials
Most plastics, including custom sourcing and matching; see materials list below
Machines Available
Single, multi-cavity, and family molds; 50 to 1,100+ press tonnage; side actions including hand-loaded cores.
Inspection and Certification Options
Includes FAI and PPAP. ISO 9001, AS9100, ISO 13485, UL, ITAR, and ISO 7 and 8 Medical Clean Room molding.
Tool Ownership
Customer-owned with mold maintenance
Standard Lead Time
3 Business days

Need overmolding that meets your high-precision requirements? Get in touch for a free quote!
Material Selection
Our material range covers everything from standard plastics to specialized thermoplastics and elastomers. Whether you're looking for flexibility, chemical resistance, or superior strength, we have the material options to support your product's performance.
Metals
- Titanium
- Steel
- Stainless Steel
- Zinc Alloy
- Chromium-Nickel Alloy
- Brass
- Copper
- Aluminum
- Bronze
- Cold Rolled Steel
- Nickel
- Silver-Tin Oxide
- Cast Iron

Titanium is known for high strength, low weight, and corrosion resistance. We process grades like Ti-6Al-4V, Ti-5Al-2.5Sn, Ti-6Al-4V ELI, and Ti-Grade 2, which are widely used in aerospace, medical implants, and sports equipment.
Plastics
- Polycarbonate (PC)
- Polyoxymethylene (POM)
- Polyphthalamide (PPA)
- Polyphenylene Sulfide (PPS)
- Teflon (PTFE)
- Polyvinyl Chloride (PVC)
- Ultra High Molecular Weight Polyethylene (UPE)
- Polyether Ether Ketone (PEEK)
- Nylon (PA)
- Glass-Filled Nylon

Polycarbonate is a transparent, highly durable plastic known for its superior impact resistance. We offer different grades suitable for eyewear lenses, medical devices, and protective equipment.
We offer customization based on your specific material requirements, if you need a material not listed here, our team can source and process ito meet your exact needs

The materials listed are just a few we offer. If you have specific material needs, feel free to reach out, and we'll guide you in selecting the best fit for your project.
Surface Finishing
Our surface treatments are designed to enhance your product’s usability and appearance. Whether you need a smooth, high-gloss finish for consumer products or a durable, textured surface for industrial applications, we provide customized solutions for your project

These are just a few of the surface finishing options we offer. lf you have a specific requirement, please reach out to us to discuss the best solution for your project.
Advantages & Features
Our overmolding services deliver advanced solutions for creating multi-material components with precision and durability. JuSheng offers high-quality overmolding that enhances product functionality and aesthetic appeal. Here's why we are your ideal choice for overmolding.


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Case Studies
Our overmolding solutions have been successfully applied in various industries. Below are some examples that demonstrate our ability to deliver high-quality, multi-material overmolded components tailored to specific industry needs:

These case studies highlight our expertise in delivering high-quality overmolding solutions across various industries. Contact us today to discuss your specific overmolding requirements and how we can support your project.
Quality Control
At JS, we are dedicated to providing flawless overmolding services through a rigorous quality control process. Our quality assurance system guarantees that every component meets the highest standards of adhesion, durability, and performance for its intended application.
In-Process Inspections
Before any part leaves our facility, it undergoes a thorough final inspection. We use advanced measurement tools to verify that every component meets required specifications and precision standards, ensuring the highest level of quality before delivery.
Final Inspections
Before any part leaves our facility, it undergoes a thorough final inspection to verify its quality and precision. We use advanced measurement tools and techniques to ensure that each part meets the required specifications and standards.
Precision Measurement Tools
To maintain exacting standards, we use sophisticated tools like Coordinate Measuring Machines (CMM) and laser scanners. These allow us to measure and verify that every part is produced with tight tolerances and to the precise specifications required for reliable performance.
Certified Quality Standards (ISO 9001, ISO 14001, IATF 16949, AS9100D)
Our commitment to quality is backed by ISO 9001 certification, which ensures our quality management system is consistently effective and continually improving. We also adhere to ISO 14001, IATF 16949, and AS9100D standards, ensuring we meet the needs of various industries while maintaining environmental sustainability and operational excellence.
Continuous Improvement
We believe in continuous improvement and regularly review our processes and practices to identify areas for enhancement. By investing in the latest technologies and training for our staff, we strive to maintain our reputation for quality and innovation.


Whether for complex consumer electronics or medical devices, JS provides reliable, high-performance solutions tailored to your needs.
Contact Us for More Information
Should you have any additional questions or require more details, feel free to reach out to us. Our dedicated team is ready to assist you with all your precision manufacturing requirements.
At JS, we understand that you may have questions about our overmolding services. Here are the answers to some of the most common inquiries. If you have further questions, our team is always ready to assist you.

If you have any additional questions or need more information, don’t hesitate to reach out to us. Our team at JS is here to provide you with expert assistance and support for all your overmolding needs.
Customer Testimonials
At JS, we take pride in delivering precise and reliable Overmolding solutions. Here’s what some of our clients have to say about their experience working with us:

These testimonials reflect our commitment to excellence and customer satisfaction. Join our list of satisfied customers by choosing JS Manufacturing for your Overmolding needs. Contact us today to discuss your project and get an instant quote.
Latest News
Stay informed with the latest updates and announcements from JS. Learn about our most recent projects.