Pa plastic mold

We specialize in custom PA plastic mold development, PA (Polyamide, also known as Nylon) component production, and optional assembly services—not finished product trading. Our molds are engineered to maximize PA’s exceptional properties (high tensile strength, excellent wear resistance, chemical stability) while addressing its molding challenges (e.g., moisture absorption, variable crystallinity), delivering high-performance PA parts for automotive, industrial machinery, electronics, and consumer goods.

1. Custom Mold Structures: Tailored to PA’s Molding Characteristics

PA’s unique properties (high crystallinity, moisture sensitivity, good flowability) require molds that enhance its strength and precision for load-bearing and wear-resistant applications. Our custom mold structures include:

Cavity & Core: Machined via high-precision CNC machining (tolerance as tight as ±0.01mm) to suit PA’s needs:

Reinforced cavity designs for glass-filled PA variants—incorporates thicker cavity walls (3–5mm) and wear-resistant mold steels (e.g., H13) to withstand abrasion from glass fibers, extending mold lifespan by 30–40%.

Uniform wall thickness (1.5–4mm) with gradual transitions—PA’s high crystallinity causes shrinkage (1.5–3.5%); uneven thickness leads to warping, which compromises precision for fit-critical parts like automotive fasteners.

Optimized draft angles (2–4° for vertical surfaces)—PA’s moderate rigidity and tendency to stick to mold surfaces require sufficient draft to ensure easy demolding, preventing surface damage to parts like gears or brackets.

Gating System: Designed for PA’s good melt flowability (MFR 5–25 g/10min):

Edge gates or fan gates for large structural parts (e.g., industrial machine brackets)—enables uniform material flow, reducing weld lines that weaken PA’s tensile strength (critical for load-bearing components).

Hot runner systems with temperature control (230–260°C) for multi-cavity parts (e.g., batch-produced nuts/bolts)—maintains PA’s melt stability, cuts material waste by 18–25%, and eliminates cold runners that cause inconsistent shrinkage.

Cooling System: Calibrated to control PA’s crystallization rate and moisture impact:

Evenly spaced cooling channels (10–15mm apart) with adjustable temperature (40–60°C)—PA’s variable crystallinity depends on cooling rate; controlled cooling ensures consistent part density, preserving strength for parts like bearing cages.

Post-molding cooling stations for moisture-sensitive PA grades—prevents moisture absorption during cooling, which causes dimensional instability in parts like electronic connectors.

Ejection System: Suited to PA’s rigidity and surface quality needs:

Ejector pins with rounded tips (arranged at non-functional areas)—avoids marking PA’s surface, which is important for visible parts like consumer goods handles.

Stripper plates for flat PA parts (e.g., washers, thin brackets)—distributes ejection force evenly, preventing bending of PA’s rigid structure.

2. PA Material Variants & Their Applications

PA is available in diverse grades to meet specific performance needs—we select the right variant based on your component’s function and environment:

PA6: Ideal for general-purpose parts (e.g., consumer goods handles, textile machinery components). Offers good tensile strength (60–70 MPa), impact resistance (5–10 kJ/m²), and cost-effectiveness—suitable for low-to-medium load applications with moderate temperature requirements (up to 80°C).

PA66: Used for high-performance parts (e.g., automotive engine bay components, industrial gears). Boasts higher tensile strength (70–80 MPa) and heat resistance (up to 120°C) than PA6—handles higher loads and temperatures, making it ideal for automotive and industrial use.

Glass-Filled PA (GF-PA, 10–40% GF): Perfect for heavy-load structural parts (e.g., automotive suspension brackets, industrial machine gears). Reinforced with glass fiber to boost tensile strength (up to 120 MPa) and reduce shrinkage (0.5–1.5%)—supports heavy loads without deformation, critical for high-stress applications.

Mineral-Filled PA (MF-PA): Great for dimensionally stable parts (e.g., electronic device housings, precision connectors). Filled with minerals (e.g., talc) to enhance dimensional stability and reduce warping—ideal for parts requiring tight tolerances in humid environments.

Heat-Resistant PA (HR-PA): Suitable for high-temperature applications (e.g., automotive under-hood parts, kitchen appliance components). Modified with heat stabilizers to withstand temperatures up to 150–180°C—maintains strength and shape in hot environments, such as near engines or heating elements.

Chemical-Resistant PA (CR-PA): Used for parts exposed to chemicals (e.g., fuel system components, laboratory equipment). Resists oils, fuels, and mild acids—maintains structural integrity in harsh chemical environments, ideal for automotive and industrial applications.

3. PA Injection Molding Process: Optimized for Performance

Our injection process is fine-tuned to maximize PA’s strength, durability, and precision, with key advantages:

Precision & Consistency:

Melt temperature control (230–280°C, grade-dependent)—PA degrades above 300°C; precise heating ensures optimal flow without material breakdown, preserving tensile strength and reducing brittleness.

Injection pressure (70–100 MPa) with steady injection speeds—balances PA’s flowability to fill mold cavities fully, avoiding underfilling (which ruins precision) or overfilling (which causes flash).

Dimensional tolerance control (±0.015mm for small parts) via servo-driven machines—critical for PA parts like automotive fasteners or electronic connectors, where even minor deviations affect assembly.

Durability Enhancement:

Moisture pre-drying (80–100°C for 4–6 hours)—PA absorbs moisture easily, which causes bubbles and internal defects; pre-drying ensures parts have no voids, preserving wear resistance and tensile strength.

Post-molding annealing (100–120°C for 2 hours)—reduces residual stress, preventing cracking in PA parts exposed to temperature fluctuations (e.g., automotive parts in extreme weather).

Efficiency & Cost-Effectiveness:

Fast cycle times (20–40 seconds per part)—PA’s good flowability and moderate crystallization rate enable efficient production, with daily output up to 40,000 parts for small components like nuts/bolts.

Multi-cavity molds (16–48 cavities for small parts)—PA’s consistent flow supports uniform part quality across cavities, lowering per-unit costs for large orders (10,000+ parts).

4. Our Services: Beyond Molds—PA Components & Assembly

We provide end-to-end solutions for PA production, tailored to strength and precision-focused needs:

PA Component Manufacturing: Produce custom PA parts in sizes (5×5mm to 500×300mm), shapes (gears, brackets, fasteners), and finishes (smooth, textured). Supports tight tolerance requirements (down to ±0.015mm) and surface treatments (e.g., anti-corrosion coating, lubricant infusion for enhanced wear resistance).

Value-Added Assembly: Optional assembly services for PA sub-assemblies—e.g., assembling PA gears into gearboxes, attaching metal inserts to PA brackets (for enhanced load capacity), or integrating PA parts with rubber gaskets (for waterproofing). Delivers ready-to-install sub-assemblies, saving your production time.

Custom Design Support: Offer 3D mold design and PA prototyping (via CNC machining or injection molding). We produce 20–50 prototype parts in 3–4 days to test PA’s performance (tensile strength, wear resistance, dimensional stability) and optimize the mold design before mass production.

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.