Overmolding Service
High-quality custom overmolding services for prototypes and on-demand production parts. Rapid Tooling Production as fast as 2 weeks.
What is Overmolding?
The overmolding process involves molding one plastic material over another. This ensures a seamless combination of multiple plastic parts to give a uniform and durable product. Insert molding and multi-shot molding processes help combine materials for functional and aesthetic purposes.
Zhonghui’s plastic injection overmolding uses these processes to ensure every component meets industrial standards.
Overmolding Process
At Zhonghui, our surface finishes enhance the durability and appearance of bent metal components, meeting the high standards required by diverse industries.
Overmolding improves product functionality and aesthetics by fusing different materials into one part, adding features like soft grips and multi-color designs for enhanced usability
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Plastic over Plastic |
Rubber Over Plastic |
Plastic Over Metal |
Rubber Over Metal |
Crucial for mass production, involves machining, and assembling durable molds from steel or aluminum to ensure precise and repeatable part geometries. |
Overmolding improves product functionality and aesthetics by fusing different materials into one part, adding features like soft grips and multi-color designs for enhanced usability. |
Insert molding integrates metal or other materials into plastic parts during molding, enhancing strength and reducing assembly time for components with embedded features. |
Insert molding integrates metal or other materials into plastic parts during molding, enhancing strength and reducing assembly time for components with embedded features. |
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*Aluminum and steel injection mold.
*Achieves detailed geometries.
*Ideal for mass production.
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*Improves strength and lifespan.
*Combines different materials seamlessly.
*Offers color and texture options.
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*Reduces assembly steps.
*Enhances component durability.
*Lowers production expenses.
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*Reduces assembly steps.
*Enhances component durability.
*Lowers production expenses.
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Zhonghui Mold Tooling Services
A, PROTOTYPING-Rapid Tooling
Get easy design feedback and validation through superior quality prototype tooling. Create small batches of plastic molded parts with excellent injection molding prototypes. We excel at manufacturing prototype molds within days to ensure you perform functional tests and validate market interest..B, PRODUCTION- Production Tooling
We create high-quality production molds for high-volume plastic parts production. With high-strength, durable tool steel material, our production tooling is suitable for producing hundreds of thousands of parts. We can vary materials and construction methods according to your unique requirements.Materials for Insert Molding
We offer a broad range of thermoplastic and thermoset materials, each selected for its performance characteristics and suitability for different applications.
a.Such as: ABS/ Polycarbonate/ PMMA/ POM/ Nylon/ Polypropylene/ PEEK/ Polypropylene/ HDPE/ HIPS/ LDPE.
| ABS | ABS is strong, durable, and offers good resistance to heat and impact. It’s preferred for automotive components and consumer goods. | ABS Beige(Natural), ABS Black, ABS Black Antistatic, ABS Milky White, ABS+PC Black, ABS+PC White |
| Polycarbonate | Polycarbonate is extremely durable and has high impact resistance, along with excellent clarity, used for bullet-proof glass and protective gear. | PC Black, PC Transparent, PC White, PC Yellowish White, PC+GF30 Black |
| PMMA | PMMA, or acrylic, is known for its crystal clarity and weather resistance, making it ideal for outdoor fixtures and display cases. | PMMA Black, PMMA Transparent, PMMA White |
| POM | POM is strong, with a low friction surface and good dimensional stability, perfect for precision parts in mechanical applications. | Dark brown (coffee) POM 100AF, POM Black, POM Blue, POM White |
| PA(Nylon) | Nylon is versatile, strong, and wears well against friction, commonly used for gears, bearings, and other wear-resistant surfaces. | PA(Nylon) Blue, PA6 (Nylon)+GF15 Black, PA6 (Nylon)+GF30 Black, PA66 (Nylon) Beige(Natural), PA66 (Nylon) Black |
| Polyethylene | Polyethylene is lightweight and has high resistance to impact, widely used in packaging and containers. | PE Black, PE White |
| PEEK | PEEK is renowned for its high temperature resistance and strength, often used in aerospace and medical implant manufacturing. | PEEK Beige(Natural),PEEK Black |
| Polypropylene | Polypropylene is tough, has excellent chemical resistance, and is used for automotive parts, containers, and in packaging. PP Black, PP White, PP+GF30 Black |
PP Black, PP White, PP+GF30 Black |
| HDPE | HDPE is known for its high strength-to-density ratio, resistance to impacts, and is used in making bottles and corrosion-resistant piping. | HDPE Black, HDPE White |
| HIPS | HIPS is easy to machine and offers good dimensional stability and impact resistance, suitable for prototyping and modeling. | HIPS Board White |
| LDPE | LDPE is soft, flexible, and used in applications where heat sealing is required, such as in tubing and plastic bags. | LDPE White |
| PBT | PBT is a strong, rigid plastic that is heat resistant and commonly used in electrical components and casings. | PBT Black, PBT Milky White（Natural） |
| PVC | PVC is robust, cheap, and has good chemical resistance, used in plumbing, medical devices, and cables. | PVC Grey |
| PET | PET is strong, resistant to moisture and chemicals, and widely used in food containers and textile fibers. | PET Black, White, PET+GF30 Black, PET+GF30 White |
Overmolding Capabilities
Zhonghui’s custom overmolding services ensure the creation of plastic parts that look and perform better. Our production line consists of an overmolding injection molding process that allows us to combine several different materials into one, ensuring you get superior-quality products.
| Standards | Description | |
| Maximum Part Size | 400×700×200mm, 16 ×29×8 in. | |
| Manimum Part Size | 2×2×2mm, 0.08×0.08×0.08in | |
| Substrate Wall Thickness | From 0.5 to 3mm,From 0.20 to 0.12 in. | |
| Tolerance | +/- 0.025 mm,+/- 0.00098 in. | |
| Radii | 0.1mm,0.0039in. | |
| Depth | 100mm from the parting line,3.94 in. from the parting line | |
| Mold Validation | Provide T0, T1, T2 samples before mass production | |
| Inspection and Certification Options | First Article Inspection, ISO 9001, IATF16949 | |
| Lead Time | From mold making to sample delivery: 20-45 business days | |
Advantages of Overmolding
Overmolding enhances product durability and functionality by integrating different materials, offering improved grip, aesthetics, and cost-effective assembly.
● Improved Design and Creation of Custom Plastic Parts: Overmolding capabilities ensure the creation of custom plastic-plastic or metal-plastic product combinations with a high dimensional quality.
● Better Product Performance: Overmolded parts are of excellent quality because of their two-material advantage for various applications.
● Increased Shelf and Aesthetic Appeal: The overmolding process can be optimized with many materials and surface treatment processes to improve the aesthetic quality of the product.
● Better Shock Absorption and Overall Durability: Overmolding also offers improved shock absorption due to the plastic resin addition, ensuring longer shelf life and excellent resistance against impacts.
● Lower Production Costs: Since overmolding eliminates post-assembly phase of production, it speeds up the production process and reduces overall manufacturing cost.
Applications of Overmolding
The injection overmolding process is compatible with a wide variety of materials, ranging from plastics to metals. This process helps produce custom prototypes and production parts for various applications depending on your requirements. Several industries find valuable uses for overmolding services.
● Surgical Instruments: Overmolding meets the precision and safety requirements of the medical industry. The ability to combine plastics and metal materials ensures the efficient creation of surgical devices, equipment housing, catheters, syringes, and more.
● Electrical Applications: Using thermoplastic elastomer as an overmold material makes the process useful for electrical components. Custom-made overmolded parts, like electrical outlet covers, gaskets, etc., are made to withstand harsh conditions, making them last longer.
● Hardware Tools: The functional advantages of overmolding make it an outstanding process for making pliers, screwdrivers, hammers, wrenches, pocket knives, and more. The process improves the grip of these tools, making their application more efficient.
● Household Items: The overmolding technique generally improves functional performance like grip, cleanliness, and ease of use. It also enhances vibration dampening, chemical resistance, and more. This makes them useful for household items like kitchen utensils, toothbrushes, pens, shampoo bottles, etc.
Why Choose Us
Zhonghui was founded in 2009 by Mr Huang, with over 20 years of combined professional experience in Aluminum/Zinc die casting
and CNC machining in Dong Guan of China. In 2021, we launched injection molding and sheet metal fabrication services.
Zhonghui provides highly trained engineers to support your project. We are ISO 9001: 2015 and IATF16949:2016 Accredited.
How may we help you?
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