Small batch injection molding parts

We specialize in small batch injection molding parts production and optional assembly—catering to clients across product development, medical, automotive, consumer electronics, and industrial sectors who require 100–10,000 high-quality custom plastic components. Unlike finished product traders, we focus on delivering low-volume parts that balance precision, customization, and cost-efficiency—ideal for prototyping validation, market testing, niche production, or replacement part needs. Our expertise lies in adapting injection molding technology to small-batch demands, ensuring every component meets your exact structural and performance requirements without the high tooling costs of large-scale production.

Customization for Small Batch Parts: Structural Design & Material Matching

Small batch injection molding thrives on agile structural customization—we collaborate with you to refine part geometries for your specific low-volume use case, whether it’s a prototype for design validation or a niche component for specialized equipment. For product developers, this means iterating on structural details (e.g., adjusting rib thickness for load testing) without costly mold reworks. For medical clients needing small-batch sterile parts, we design crevice-free structures that meet cleaning standards. Key custom structural features include: precision threading (M2–M40) for mechanical parts, snap-fit interfaces for easy assembly, thin-walled designs (0.5–2mm) for compact electronics, and reinforced stress points for industrial components. Every structure is optimized for both functionality and small-batch moldability, ensuring consistent quality across limited runs.

Material matching for small batch parts is tailored to application-specific performance without over-engineering for scale. We select resins based on your low-volume goals—whether it’s FDA compliance for 500 food-contact samples, heat resistance for 2,000 automotive test parts, or flexibility for 1,000 wearable device components. Our material expertise for small batches includes: using cost-effective PP for 1,000+ consumer product prototypes, medical-grade TPU for 500 wearable straps, flame-retardant ABS for 800 electronic enclosures, and PA66+GF for 300 industrial load-bearing parts. We also offer material sampling to test performance before full small-batch production, minimizing risk for your low-volume projects.

Suitable Materials for Small Batch Injection Molding & Their Uses

Small batch injection molding benefits from material versatility—we choose resins that align with your low-volume needs, from prototyping to end-use. Below are core materials and their typical small-batch applications:

- Polypropylene (PP): Ideal for small-batch consumer parts (e.g., 1,000 kitchen tool prototypes), automotive interior trims (500 test samples), and packaging components. Cost-effective, chemical-resistant, and easy to mold—perfect for validating design aesthetics and basic functionality.

- ABS: Preferred for small-batch electronic enclosures (800 router casings), toy prototypes (1,500 samples), and automotive trim parts. Offers impact resistance (15kJ/m²) and color customization (RAL/Pantone), making it suitable for market testing of consumer-facing parts.

- TPU (Thermoplastic Polyurethane): Great for small-batch flexible parts (500 wearable straps, 300 seal gaskets). Boasts high elasticity (Shore A 50–80) and skin-friendly properties—ideal for medical or consumer products requiring tactile testing.

- Nylon (PA6/PA66): Used for small-batch industrial parts (300 gear prototypes, 200 mechanical brackets). Offers wear resistance and tensile strength—suited for validating load-bearing performance in low-volume industrial applications.

- Polycarbonate (PC): Suitable for small-batch transparent parts (400 light covers, 200 medical device windows). Shatterproof and heat-resistant (up to 130°C)—perfect for testing safety-critical or optical components.

- FDA-Approved Resins (PP, PEEK): For small-batch food-contact (500 utensil prototypes) or medical parts (100 diagnostic device components). Ensures compliance for regulatory testing of low-volume end-use products.

Small Batch Injection Molding Process: Features & Advantages

Our small batch injection molding process is engineered for speed, flexibility, and precision—addressing the unique needs of low-volume production. Key process features include: cost-efficient mold solutions (aluminum molds for short runs, reducing tooling costs by 30–50% vs. steel molds), rapid setup (CAD/CAM mold design with 3–5 day turnaround for simple parts), adaptive parameters (adjusting melt temperature 180–260°C and injection pressure 60–100MPa for different materials), and in-line quality checks (100% dimensional scanning for small batches to ensure consistency). We also support quick design iterations—modifying molds for minor structural changes without significant delays, critical for product development cycles.

The advantages of our small batch injection molding service are tailored to low-volume needs: fast time-to-market (prototypes to small-batch production in 7–14 days, vs. 4–6 weeks for large-scale molding), cost efficiency (no minimum order quantities, aluminum molds for short runs, material waste under 5%), precision matching mass production (parts mirror the quality of large-scale molding, ideal for validating future scalability), and flexibility (accommodating design changes mid-batch for product refinement). Unlike 3D printing, our process delivers injection-molded parts that match the material properties and finish of final mass-produced components—critical for accurate testing and market validation.

Small Batch Assembly Services: Streamlining Low-Volume Production

To complement our small batch injection molding parts, we offer custom low-volume assembly services—integrating components into ready-to-use sub-assemblies. Examples include: assembling 500 TPU gaskets with PC enclosures for electronic prototypes, attaching metal inserts to 300 nylon brackets for industrial test parts, or packaging 100 sterile medical components in ISO 7 cleanrooms. Our assembly team uses flexible workflows to adapt to small-batch needs, with quick setup times and quality checks tailored to low-volume runs. This turnkey service saves you time coordinating multiple vendors, ensuring your small-batch parts are ready for testing, marketing, or end-use.

Whether you’re validating a new product design, testing a niche market, or needing replacement parts, our small batch injection molding parts service delivers the precision of large-scale molding with the flexibility of low-volume production. We prioritize understanding your low-volume goals—from rapid prototyping to regulatory testing—ensuring every component meets your standards. Contact us today to discuss your small batch project and experience fast, cost-effective, and custom injection molding solutions.

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.