Overmolding service provider

We are a leading overmolding service provider, specializing in custom dual-material plastic component manufacturing and optional assembly—catering to automotive, medical, consumer electronics, industrial, and wearable device sectors. Unlike finished product traders, we focus on overmolding (the process of bonding a soft or specialized plastic layer onto a rigid base material) to create high-performance parts with enhanced functionality, ergonomics, and durability. Our expertise lies in tailoring overmolding solutions to your unique needs—from grip-enhanced tools and water-resistant enclosures to biocompatible medical parts—ensuring seamless material bonding and consistent quality across every batch.

Custom Overmolded Parts: Structural Design & Material Synergy

Overmolding’s core advantage is custom structural integration—we design parts where a rigid base (for structural support) and a overmolded layer (for function/ergonomics) work in perfect synergy. Our engineering team collaborates with you to optimize structures for bonding strength and performance: for automotive handle grips, we design rigid ABS/PA bases with textured surfaces (to boost soft TPE adhesion) and ergonomic overmold contours (for comfort); for electronic enclosures, we integrate rigid PC bases with overmolded TPU gaskets (for water resistance IP67+); for medical tools, we create crevice-free rigid PP bases with overmolded soft TPE (for sterile grip). Key custom structural features include: textured bonding interfaces (90%+ adhesion strength), integrated seals/gaskets, ergonomic soft-touch surfaces, and precision cutouts (for electronic components). Every design is validated via adhesion and performance testing to ensure durability.

Material synergy is critical to overmolding success—and as a specialized service provider, we select compatible base-overmold material pairs tailored to your application. For grip-focused parts (e.g., tool handles), we pair rigid ABS/PA bases with soft TPE/TPU overmold (Shore A 30–70) for tactile comfort. For high-temperature applications (e.g., automotive under-hood parts), we use heat-resistant PA66+GF bases with silicone overmold (up to 200°C). For medical devices, we combine FDA-approved PP bases with biocompatible TPE overmold (skin-friendly, ISO 10993 compliant). For chemical-resistant parts (e.g., industrial valves), we pair rigid POM bases with chemical-resistant TPU overmold. We also test material compatibility for bond strength (≥5MPa for structural parts) and environmental resistance before production.

Key Material Pairs for Overmolding & Targeted Applications

Overmolding relies on compatible material combinations to ensure strong bonding and performance. Below are our most trusted material pairs and their tailored applications, showcasing our expertise as an overmolding service provider:

- Rigid Base: ABS / Overmold: TPE/TPU: Ideal for consumer/industrial parts—tool handles, remote controls, toy components. ABS provides structural rigidity, while TPE/TPU (Shore A 40–60) offers soft grip and impact absorption. Color-matching available for brand alignment.

- Rigid Base: PA66+GF / Overmold: TPU/Silicone: For automotive/industrial parts—engine covers, sensor housings, heavy-duty tool grips. PA66+GF resists high loads/temperatures, while TPU/silicone adds chemical resistance and vibration damping.

- Rigid Base: PC / Overmold: TPU: Perfect for electronic parts—smartphone cases, charger plugs, outdoor device enclosures. PC delivers transparency and impact resistance, while TPU adds scratch resistance and water-sealing properties (IP65+).

- Rigid Base: PP (FDA) / Overmold: TPE (Medical Grade): For medical/ food-service parts—surgical tool grips, food processor handles. PP meets FDA standards, while medical TPE offers biocompatibility, sterile grip, and easy cleaning.

- Rigid Base: POM / Overmold: TPU: For mechanical parts—gears, valves, bearing housings. POM provides low-friction rigidity, while TPU adds wear resistance and noise reduction (30%+ noise dampening).

Overmolding Process: Features & Service Advantages

Our overmolding process is engineered forprecision bonding and consistency, leveraging advanced technology to ensure seamless material integration. Key process features include:dual-shot or insert overmolding capabilities (we use dual-shot machines for high-volume parts and insert molding for complex geometries); precise temperature control (melt temperature 180–260°C for base materials, 160–220°C for overmold materials—critical for bonding);custom mold design (with dedicated cavities for base and overmold, plus textured bonding surfaces); in-line quality checks (adhesion pull tests, dimensional scanning, and environmental resistance testing). We support both small-batch (100–1,000 units) and high-volume (100k+ units) production, with consistent bonding strength across all scales.

As your overmolding service provider, our unique advantages include: superior bonding reliability (defect rate ≤0.2% for adhesion failures), design flexibility (ability to overmold complex shapes, logos, and textures), cost efficiency (one-step production eliminates post-assembly of separate grip/seal parts, reducing costs by 20–30%), functional enhancement (adding grip, sealing, vibration damping, or ergonomics in one process), and material expertise (access to 50+ base-overmold material pairs for every application). Unlike traditional two-part assembly, our overmolded parts have no seams—reducing failure risks and improving aesthetics.

Value-Added Assembly for Overmolded Parts

To complement our overmolding services, we offer custom assembly for overmolded components—integrating them into ready-to-install sub-assemblies. Examples include: assembling overmolded TPU-gripped medical tools with metal inserts, integrating overmolded electronic enclosures with circuit boards (IP67 sealing guaranteed), and packaging overmolded automotive interior parts with mounting brackets. Our assembly team uses specialized jigs to protect overmolded surfaces (avoiding scratches on soft TPE/TPU layers) and conducts final adhesion checks to ensure part integrity. This turnkey service saves you time coordinating multiple vendors and ensures your overmolded parts are production-ready.

Our Overmolding Service Process

We follow a streamlined process to deliver tailored overmolding solutions: 1) Design Consultation: Collaborate on base-overmold structure and material selection, with 3D modeling for bonding validation. 2) Prototype Development: Produce 20–50 overmolded prototypes in 3–5 days for adhesion and performance testing. 3) Mold Engineering: Build custom dual-cavity molds (hardened steel for high-volume runs) with textured bonding interfaces. 4) Production & Quality Control: Automated overmolding with real-time bonding strength monitoring. 5)Assembly & Delivery: Optional assembly and JIT delivery to align with your production schedule.

As your trusted overmolding service provider, we don’t just manufacture parts—we create dual-material solutions that enhance your end-product’s performance and user experience. Whether you need grip-enhanced tools, water-resistant electronics, or sterile medical parts, our custom overmolding services deliver seamless material integration and consistent quality. Contact us today to discuss your project and experience the difference of working with a specialized overmolding partner.

We are plastic mold maker and can provide custom mold service, we can make injection molds, blow molds, rotational molds and die-casting molds.

For custom injection molds, we can provide professional custom injection molding services. Usually Plastic injection mold manufacturing Molding are manufactured using injection molding technology. The mold materials for injection molds can be chosen from P20, 718, S136, H13 and so on. The mold material reflects the mold life and product material requirements.

For parts that require blow molding production, we can also provide professional custom blow molding services.

Plastic injection mold manufacturing Injection Mould making

1.We communicate product design according to samples/drawings and your requirements.

2.After the product design is confirmed, we carry out the mold design, we provide all kinds of injection molds, blow molds, silicone molds, die-casting molds services.

3.Material procurement, steel cutting and mold basic tools.

4.Mold assembly

5.Mold inspection, tracking and controlling mold processing.

6. We will inform you the date of mold trial and send you the sample inspection report and injection parameters together with the sample.

7.Your instruction and confirmation of shipment.

8.Prepare the mold before packing.

Plastic injection mold manufacturing molding Specification

1. Professional manufacturer, design, production injection mould and stamping mould quality control

2. rich export experience plastic injection mould and stamping mould

3. Reasonable price of design mould

4. Cavities: single or as per your requirements cavity

5. Treatment: S45C Pretreat>25Hrc,And Nitriding

6. Mould Steel: Cavity ,Core and slide: P20 ,2738,2136 available Moldbase :LKM available

7. Standard:DEM ,HUSKY,available

8. Hot runner: according to your demand

9. Life time: >300 Thousand Times

10. Package: Plywood case, anti-rust paint

Mold design：

Information you need to provide us

1. If you have drawings, 2D drawings, 3D drawings (preferably in STEP format).

2. If there are no drawings, you need to provide specific length, width, height and weight information. (It’s best to send us samples)

3. Should the mold be sent to your country, or leave the mold in our factory and we will help you produce the product.

4. Mold material requirements, cavity number requirements (you can tell us about the size of your injection molding machine)

5. Product material requirements and product quantity. (You can tell us about the use of the product and we can give you suggestions)

Transaction process:

Mold testing：

Once the mold is complete, I do a mold test. It usually takes about 3-5 days to complete. We need to assemble the mold, adjust the pressure data of the machine, and try production. We need to check whether there are problems during the normal production of the mold and make modifications.

Product packaging

Packaging according to your needs

1.By air ,it takes 3-7 days for delivery .The goods can be shipped by DHL ,Fedex ,UPS .

2.By sea ,the delivery time is based on your port .

To South East Asian Countries takes about 5-12 days

To Middle east countries takes about 18-25 days

To European countries takes about 20-28 days

To American countries takes about 28-35 days

To Australia takes about 10-15 days

To African countries takes about 30-35 days.

Factory

Video-1: (Factory Video)

Video-2: (Injection Molding)

Video-3: (Blow molding)

Video-4: (Blow molding)

Video-5: (Roll molding)

Customer satisfaction is our most important goal. We focus on communication and cooperation with our customers, always pay attention to their needs and provide quick response and quality customer service. Our injection production mold factory is committed to establishing long-term relationships and ensuring that our customers receive the best after-sales service during the purchase and use of our products, and we will definitely do our best to solve any problems for our customers.

FAQ

1. Who are we?

We are based in Zhejiang, China, start from 2014,sell to North America(30.00%),Southern Europe(10.00%),Northern.

Europe(10.00%),Central America(10.00%),Western Europe(10.00%),Mid East(10.00%),Eastern Europe(10.00%),South America(10.00%). There are total about 51-100 people in our office.

2. How can we guarantee quality?

Always a pre-production sample before mass production;

Always final Inspection before shipment.

3. What can you buy from us?

Mould,Plastic Product, Metal Product,Dental Product,CNC machining.

4. Why should you buy from us not from other suppliers?

Ningbo P&M Plastic Metal Product Co., Ltd. We main do all kinds of 3d design, 3d printing and plastic metal molds tooling and products. We have our own engineer and factory. One-stop supply:3d design - 3d printing - mold making - plastic injection.

5. What services can we provide?

Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,DDU;

Accepted Payment Currency:USD,EUR;

Accepted Payment Type: T/T,L/C,PayPal,Western Union,Escrow;

Language Spoken:English,Chinese,Spanish,French,Russian.

6. What are the characteristics of your service?

1. Your inquiry related to our products or prices will be replied within 24hours.

2. Welltrained and experienced staffs to answer all your enquiries in fluent English.

3. Offering the support to solve the problem in the application or selling period.

4. Competitive prices based on same quality.

5. Guarantee samples quality same as mass production quality.