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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.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).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.Precision (±0.02mm): Ensure perfect material integration with tight tolerances.

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  • 证书.pngISO 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.
overmolding

Service

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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

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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

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 (PC)

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

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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

Natural Gloss

NaturalGloss

Mechanical/chemical polishing creates reflective mirror finish without coating. Ideal for decorative metal parts.

Matte

Matte

Sandblasting/etching creates uniform non-reflective texture with anti-fingerprint properties. Used on electronic enclosures.

Electropolish

Electropolish

Electrochemical process removes micro-protrusions for ultra-smooth, corrosion-resistant surfaces. Common in medical/food-grade stainless steel.

Electrophoresis

Electrophoresis

Electric field deposits paint particles uniformly on complex shapes. Offers strong adhesion and eco-friendly process.

Chromeplate

Chromeplate

Electroplated chromium layer provides mirror-like finish (800-1000HV hardness). Used in automotive trim & bathroom fixtures.

Gold Plating

GoldPlating

Depositing 0.1-5μm gold layer enhances aesthetics and oxidation resistance. Ideal for electronic contacts/jewelry.

Black Oxide

BlackOxide

Chemical oxidation creates black Fe3O4 layer to reduce glare and improve rust resistance. Used on tools/machinery parts.

Black Glossy

BlackGlossy

High-gloss black coating via spray/plating combines aesthetics and weather resistance. Applied to consumer electronics.

Black Sand Texture Powder Coating

BlackSandTexturePowderCoating

Textured powder coating mimics sand grains for scratch-resistant surfaces. Used in outdoor equipment.

Black Tabby Powder Coating

BlackTabbyPowderCoating

Matte black powder coating with smooth finish for corrosion protection. Used in appliances/industrial machinery.

Black Yarn Pattern Powder Coating

BlackYarnPatternPowderCoating

Interwoven fiber-like texture improves grip and wear resistance. Ideal for tool handles.

Anodize Type II Matt

AnodizeTypeIIMatt

Matte black anodized aluminum with high hardness and fingerprint resistance. Common in electronics.

Gold Chromate

GoldChromate

Chromate coating dyed gold for corrosion resistance and aesthetics. Applied to zinc alloy parts.

Paint Coating Black

PaintCoatingBlack

Thermally cured matte black paint with scratch resistance. Used in automotive interiors.

Brush True Color Chromate

BrushTrueColorChromate

Brushed texture with chromate coating maintains metallic look and rust prevention. For aluminum signs.

Brush Passivate

BrushPassivate

Brushed stainless steel passivated to remove iron ions and improve corrosion resistance. Used in cutlery/medical tools.

Brush Red Copper

BrushRedCopper

Mechanically brushed red copper with linear grain for decorative applications like artworks.

Polish Red Copper

PolishRedCopper

Hand/machine polished red copper with enhanced oxidation resistance. Used in sculptures/jewelry.

Polish Brass

PolishBrass

High-gloss polished brass for vintage-style lighting fixtures and hardware.

Bead Blast 304 Steel

BeadBlast304Steel

Abrasive blasting creates uniform satin finish on 304 stainless steel. Hides minor scratches in architectural panels.

Bead BlastRed Copper

BeadBlastRedCopper

Sandblasted red copper with matte texture to slow oxidation. Common in artistic metalworks.

Bead Blast Brass

BeadBlastBrass

Blasted brass surface reduces glare and improves wear resistance. Used in door handles.

Oil-Sprayed White Matte

Oil-SprayedWhiteMatte

White matte oil-based coating with soft touch and easy cleaning. Applied to appliance control panels.

Temper

Temper

Heating/cooling process modifies metal hardness (e.g. aluminum T6). Critical for load-bearing components.

Carbonization

Carbonization

High-temperature carbon infusion boosts surface hardness (up to 60HRC). Used in gears/cutting tools.

Harden Oxide

HardenOxide

Hard anodizing creates thick oxide layer (50-100μm) with insulation/heat resistance. For aerospace components.

Harden Glossy Anodize Type II

HardenGlossyAnodizeTypeII

Glossy black hard anodizing with ceramic-like finish. Provides extreme wear resistance for cameras/optics.

True Color Chromate

TrueColorChromate

Chromate conversion coating retains base metal color, improves corrosion resistance and conductivity. Used on aluminum/zinc substrates.

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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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Flawless Material Integration

Flawless Material Integration

JS ensures perfect bonding between materials, enhancing product durability and functionality for industries like electronics, automotive, and consumer goods.

Improved Functionality

Improved Functionality

Overmolding boosts grip, insulation, and shock resistance, ideal for high-performance applications.

Fast Turnaround

Fast Turnaround

With 2-4 week lead times, JS ensures your projects stay on schedule without sacrificing quality.

Custom Material Combinations

Custom Material Combinations

JS offers versatile material options, from soft-touch plastics to metal overmolding, tailored to your needs.

Scalable Solutions

Scalable Solutions

Whether for prototypes or mass production, JS handles both with consistent precision.

ISO-backed Quality Assurance

ISO-backed Quality Assurance

Our ISO 9001 certification and advanced testing ensure each part meets the highest standards.

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Get Your Instant Quote Today and Start Your Overmolding Project!

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:

Consumer Electronics Industry

Consumer Electronics Industry

Medical Devices Industry

Medical Devices Industry

Power Tools Industry

Power Tools Industry

Automotive Industry

Automotive Industry

Home Appliances Industry

Home Appliances Industry

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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.

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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.

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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.

Overmolding is a manufacturing technique where one material is molded over another, typically to create multi-functional parts. It enhances product performance by combining materials with different properties, such as rigid plastics and flexible elastomers.

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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:

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JS’s overmolding services helped us create durable and aesthetically appealing components for our automotive interiors. The combination of different materials was flawless, and their expertise ensured that every part met our exacting standards.

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John Davis
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Automotive Solutions Inc.
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The precision and quality of JS’s overmolding services were essential for the production of our medical devices. Their ability to seamlessly bond different materials improved both the functionality and appearance of our products. Highly recommended.

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Jane Thompson
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MedTech Devices
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JS delivered outstanding overmolding solutions for our electronic components. Their ability to integrate soft and hard materials enhanced the product’s durability and user experience. The parts were delivered on time and exceeded our quality expectations.

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Michael Lee
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Innovative Electronics
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Working with JS for our overmolding needs was a great experience. Their attention to detail ensured that the molded parts had perfect adhesion between materials, making them ideal for our high-performance products. The team was highly professional and efficient.

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Emily Chen
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Precision Plastics Ltd.
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The overmolding services from JS enabled us to produce highly durable and reliable industrial parts. Their expertise in bonding different materials under tight tolerances was crucial for the success of our equipment. JS is a trusted partner in our production process.

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David Wong
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Industrial Components Co.
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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.

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