Insert molding manufacturer

We are a trusted insert molding manufacturer, specializing in custom integrated plastic components with embedded metal or non-metallic inserts, plus optional assembly services—serving automotive, medical, industrial, consumer electronics, and aerospace sectors. Unlike finished product traders, we focus on insert molding: a precision process that encapsulates pre-formed inserts (e.g., screws, nuts, pins, sensors) within molten plastic to create single-piece, high-integrity parts. Our expertise lies in tailoring insert molding solutions to your unique needs—from vibration-resistant automotive fasteners and sterile medical connectors to durable electronic housings—ensuring strong insert-plastic bonding and consistent performance across every batch.

Custom Insert-Molded Parts: Structural Design & Insert-Plastic Synergy

Insert molding’s core advantage is custom structural integration—we design parts where inserts (for strength, conductivity, or functionality) and plastic (for form, insulation, or ergonomics) work as a unified system. Our engineering team collaborates with you to optimize structures for bonding strength and manufacturability: for automotive bracket parts, we design stainless steel insert geometries with knurled surfaces (to boost plastic adhesion) and plastic rib reinforcement (for load distribution); for electronic connectors, we integrate brass pin inserts with precision-located plastic housings (for consistent conductivity); for medical valves, we embed titanium inserts in crevice-free PP plastic (for sterile performance). Key custom structural features include: knurled/threaded insert surfaces (95%+ pull-out resistance), plastic overhangs (for insert encapsulation), load-dispersing ribs, and precision insert positioning (±0.01mm tolerance). Every design is validated via pull-out force and environmental testing to ensure durability.

Insert-plastic synergy is critical to insert molding success—and as a specialized manufacturer, we select compatible insert-plastic combinations tailored to your application. For high-strength mechanical parts (e.g., industrial fasteners), we pair steel/bronze inserts with glass-fiber reinforced nylon (PA66+GF) for tensile strength up to 80MPa. For electrical components (e.g., connector pins), we use brass/copper inserts with insulating PC/ABS plastic (UL94 V-0 flame rating). For medical devices, we combine titanium/316L stainless steel inserts with FDA-approved PP/PEEK plastic (ISO 13485 compliant). For lightweight automotive parts, we embed aluminum inserts in low-density PP plastic (reducing weight by 15–20%). We also pre-treat inserts (degreasing, sandblasting) and test bond strength (≥8MPa for structural parts) to eliminate delamination risks.

Key Insert-Plastic Combinations & Targeted Applications

Insert molding relies on compatible insert-plastic pairings to ensure structural integrity and functionality. Below are our most trusted combinations and their tailored applications, showcasing our expertise as an insert molding manufacturer:

- Insert: Steel/Bronze / Plastic: PA66+GF: Ideal for industrial/automotive parts—mechanical brackets, gear hubs, suspension components. Steel/bronze provides high tensile strength, while PA66+GF offers corrosion resistance and load distribution. Pull-out force ≥10MPa for heavy-duty use.

- Insert: Brass/Copper / Plastic: PC/ABS: For electronic parts—connector housings, circuit board fasteners, switch terminals. Brass/copper ensures electrical conductivity, while PC/ABS delivers insulation and impact resistance (15kJ/m²). Flame-retardant grades available (UL94 V-0).

- Insert: Titanium/316L Stainless Steel / Plastic: PP/PEEK: Perfect for medical parts—surgical instrument handles, diagnostic device connectors, implantable component housings. Titanium/316L meets biocompatibility standards, while PP/PEEK offers sterility and chemical resistance.

- Insert: Aluminum / Plastic: PP/ABS: For lightweight applications—automotive interior trim fasteners, consumer electronics frames, portable tool housings. Aluminum reduces weight by 20–30%, while PP/ABS provides cost-effective formability and aesthetics.

- Insert: Ceramic / Plastic: PC/TPU: For high-temperature/insulation parts—sensor housings, industrial heater components. Ceramic offers heat resistance (up to 300°C), while PC/TPU provides impact protection and electrical insulation.

Insert Molding Process: Features & Manufacturing Advantages

Our insert molding process is engineered forprecision insert placement and consistent bonding, leveraging advanced automation to eliminate human error. Key process features include: automated insert loading (robotic arms with vision systems for ±0.005mm insert positioning—critical for electronic parts); controlled plastic injection (melt temperature 180–280°C, injection pressure 70–120MPa, with slow-fill stages to avoid insert displacement); custom mold design (with insert locating pins and venting to prevent air traps); in-line quality checks (insert position verification via 3D scanning, pull-out force testing, and dimensional inspection). We support both small-batch (100–1,000 units) and high-volume (100k+ units) production, with consistent bonding across all scales.

As your insert molding manufacturer, our unique advantages include: superior structural integrity (eliminates loose inserts and assembly failures—defect rate ≤0.15%), cost efficiency (one-step production replaces separate insert and plastic assembly, reducing labor costs by 25–35%), design flexibility (ability to embed multiple inserts of different materials in one part), enhanced functionality (combines plastic’s formability with inserts’ strength/conductivity), and tight tolerance control (insert positioning ±0.01mm for precision applications). Unlike traditional assembled parts, our insert-molded components have no seams—reducing corrosion risks and improving longevity.

Value-Added Assembly for Insert-Molded Parts

To complement our insert molding manufacturing, we offer custom assembly for insert-molded components—integrating them into ready-to-install sub-assemblies. Examples include: assembling insert-molded electronic connectors with wiring harnesses (conductivity tested), integrating insert-molded automotive brackets with metal frames (load-tested), and packaging insert-molded medical parts with sterile components (ISO 7 cleanroom). Our assembly team uses specialized fixtures to protect delicate inserts and conducts final checks (insert position, bonding strength) to ensure part integrity. This turnkey service saves you time coordinating multiple vendors and ensures your insert-molded parts are production-ready.

Our Insert Molding Manufacturing Process

We follow a streamlined process to deliver tailored insert molding solutions: 1) Design Consultation: Collaborate on insert selection, plastic material, and part geometry—using FEA analysis to validate bonding and load capacity. 2) Prototype Development: Produce 20–50 insert-molded prototypes in 4–6 days for functional testing. 3) Mold & Fixture Engineering: Build custom molds with insert locating systems and robotic loading fixtures (for high-volume runs). 4) Production & Quality Control: Automated insert loading, precision injection, and 100% in-line quality checks. 5) Assembly & Delivery: Optional assembly and just-in-time (JIT) delivery to align with your production schedule.

As your trusted insert molding manufacturer, we don’t just produce parts—we create integrated solutions that combine the best properties of inserts and plastic. Whether you need high-strength automotive components, precision electronic connectors, or sterile medical parts, our custom insert molding services deliver durability, functionality, and cost efficiency. Contact us today to discuss your project and experience the difference of working with a specialized insert molding 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.