Plastic overmolding specialist

Welcome to a specialized provider of high-precision plastic insert molding solutions. We are not a general trading company; we are your engineering and manufacturing partner, focused on creating custom plastic components and functional sub-assemblies that integrate metal or other inserts directly into the molded part. Our expertise lies in delivering reliability, complexity, and value at the component level.

Our Core Service: Engineered Components & Integrated Assemblies

We design and manufacture the critical plastic parts that make your products work. Our primary service is producing finished, ready-to-install plastic components with encapsulated inserts. We also provide secondary assembly services (such as ultrasonic welding, press-fitting, or adhesive bonding) to deliver more complex sub-assemblies, simplifying your supply chain and reducing total production cost.

Customization & Component Architecture

Every part is engineered to your specific function. We analyze and optimize the entire structure for manufacturability and performance:

Bosses & Ribs: Designed for optimal strength-to-weight ratio, ensuring secure fastening points for screws or inserts without causing sinks or voids.

Wall Sections: Maintained with uniform thickness to ensure consistent material flow, minimize warpage, and achieve critical tolerances.

Gates & Ejection Points: Strategically placed to minimize cosmetic defects and stress concentrations in functional areas.

Insert Interface Design: We engineer the plastic geometry (undercuts, knurls, apertures) to securely lock the insert in place, preventing rotation or pull-out under torque and tensile stress.

Assembly Features: Living hinges, snap-fits, ultrasonic horns, and alignment pins can be integrated directly into the part design for seamless subsequent assembly.

Material Science for Superior Performance

Material selection is driven by your component’s end-use environment and the insert’s properties. We guide you to the optimal polymer:

Engineering Thermoplastics: PBT, PET (Valox®, Rynite®) – Excellent electrical properties, high heat resistance for connectors, sensors. Nylon (PA6, PA66, Glass-filled) – High strength, wear resistance, and toughness for gears and structural housings. PPS, PEEK – Exceptional chemical and thermal stability for demanding automotive/ aerospace applications.

High-Performance Commodities: Polycarbonate (PC) – Impact resistance and clarity. PC/ABS Blends – A balance of toughness, heat resistance, and good aesthetics for consumer electronics housings.

Semi-Crystalline vs. Amorphous: We select based on dimensional stability, chemical resistance, and cosmetic needs. Semicrystalline materials (Nylon, PBT) offer better chemical resistance but higher shrinkage.

The Insert Molding Process: Our Technical Advantage

Insert molding is a single, automated process where a pre-fabricated insert (metal, ceramic, or another plastic) is placed into the mold, and thermoplastic is injected to form a permanent, monolithic part around it.

Key Process Advantages:

Unmatched Part Integrity: Creates a stronger, more reliable mechanical bond between plastic and insert compared to post-molding press-fitting. The plastic shrinks onto the insert during cooling, creating tremendous holding force.

Elimination of Secondary Operations: Combines multiple assembly steps (insertion, bonding, staking) into one, drastically reducing labor, error, and cost.

Enhanced Design Freedom: Allows for intricate geometries that would be impossible or prohibitively expensive with traditional assembly. Inserts can be partially exposed or fully encapsulated.

Superior Seal & Insulation: Plastic flows around the insert, creating a complete seal that can prevent corrosion, leakage, or provide electrical insulation.

Consistency & Efficiency: A highly automated process ensuring every part is produced with identical quality and bond strength, run after run.

Why Partner With Us?

Our differentiation lies in our focused expertise on the component level. We provide Design for Manufacturability (DFM) analysis upfront, own the tooling and process engineering, and maintain stringent quality control to deliver parts that perform reliably in your final product. From prototyping to high-volume production, we ensure your custom insert-molded components are cost-effective, robust, and delivered on time.

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.