Mold for plastic fittings

We specialize in custom plastic fitting mold development, plastic fitting component production, and optional assembly services—not finished product trading. Our molds are engineered to match your plastic fittings’ unique needs (e.g., leak-proof joints, precise interface dimensions, load-bearing connections) , with tailored designs, industry-specific material compatibility, and optimized injection molding to deliver reliable plastic fitting parts for plumbing, electronics, furniture, and industrial systems.

1. Custom Mold Structures: Tailored to Plastic Fitting Requirements

Plastic fittings (e.g., pipe elbows, electronic connector housings, furniture joint fasteners) demand strict interface precision (for seamless connection), sealing performance (to prevent leakage), and structural strength (for load/ pressure resistance)—our mold structures are customized to address these key demands:

Cavity & Core: Machined via high-precision CNC threading/turning tools (tolerance as tight as ±0.01mm for interfaces) to replicate critical features—such as threaded joints (internal/external threads with consistent pitch, e.g., M5–M20 for industrial fittings), sealing grooves (0.5–1mm width for O-rings/gaskets), and reinforcement ribs (1–2.5mm thick for pressure/load dispersion). For complex fittings (e.g., 3-way pipe connectors, multi-port electronic housings), the mold’s multi-core design ensures full material filling of branch interfaces, avoiding voids that cause leakage or structural failure.

Gating System: Designed to avoid weakening sealed/load-bearing zones and ensure uniform material flow. For small fittings (size ≤30mm, e.g., electronic connectors), micro pin gates (0.4–0.6mm) positioned at non-sealing, non-threaded areas prevent stress concentration and eliminate post-molding trimming. For large pressure-bearing fittings (size ≥50mm, e.g., plumbing elbows), hot runner systems with multi-point gates distribute plastic evenly, reducing material waste by 12–18% and maintaining consistent wall thickness (1.5–3mm) in pressure-sensitive zones.

Cooling System: Optimized for fittings’ irregular shapes (e.g., curved elbows, multi-branch connectors) and thickened interface areas. Spiral cooling channels around threaded joints and zonal cooling for branch sections ensure rapid, even heat dissipation—critical for maintaining thread precision (no deformation that affects connection) and reducing cycle time by 20–30%. For pressure-bearing fittings, additional cooling pins in sealed grooves prevent shrinkage (which compromises leak-proof performance).

Ejection System: Uses ejector sleeves (for cylindrical fittings/threaded joints, to avoid thread damage) or ejector pins (arranged at non-interface, non-sealing areas) to protect functional structures. Gentle, balanced ejection force avoids cracking of reinforcement ribs or distortion of sealing grooves—ensuring the fitting’s connection and sealing performance aren’t compromised.

2. Suitable Plastic Materials: Matched to Plastic Fitting Applications

Plastic fittings face environmental stress (chemical corrosion, temperature/pressure fluctuations) and mechanical load (joint tension, fluid pressure)—we select materials based on durability, compatibility with media (e.g., water, chemicals, electronics), and use scenarios:

PVC (Polyvinyl Chloride): Ideal for plumbing/pipe fittings (e.g., water pipe elbows, drain connectors). Offers excellent chemical resistance (to water, mild acids/alkalis), good pressure resistance (up to 1.6MPa for standard grades), and low cost—suitable for indoor/outdoor non-high-temperature plumbing systems (≤60°C).PPR (Polypropylene Random Copolymer): Used for hot-water plumbing fittings (e.g., radiator connectors, hot-water pipe joints). Features high heat resistance (up to 95°C for long-term use), good impact resistance (even at low temperatures), and non-toxicity (meets food-contact standards)—ideal for residential/commercial hot-water systems.

Nylon 6/66 (PA6/PA66): Perfect for industrial/electronic fittings (e.g., machine joint fasteners, connector housings). Provides high tensile strength (up to 70MPa) and wear resistance—supports mechanical load (tension/compression) and withstands industrial environments (e.g., oil, dust). PA66 with 15–20% glass fiber reinforcement enhances pressure resistance for heavy-duty applications.

POM (Polyoxymethylene): Great for precision-mating fittings (e.g., furniture quick-connect joints, small electronic connectors). Boasts high dimensional stability (low shrinkage ≤2%) and low friction coefficient—ensures smooth, repeatable connection (no loosening over time) and compatibility with frequent assembly/disassembly.

PVDF (Polyvinylidene Fluoride): Suitable for chemical/industrial high-performance fittings (e.g., chemical pipe connectors, laboratory fluid joints). Features extreme chemical resistance (to strong acids/alkalis, solvents) and high temperature resistance (up to 150°C)—ideal for harsh media-handling systems (e.g., chemical processing, pharmaceutical production).

3. Injection Molding Process: Optimized for Plastic Fitting Quality

Our injection molding process is fine-tuned to meet plastic fittings’ sealing, precision, and durability demands, with these core advantages:

Leak-Proof & Interface Precision: Injection parameters (temperature 180–260°C, pressure 70–110MPa, based on material) are optimized to ensure dense material structure—no internal voids in sealed grooves or threaded joints. Interface dimensions (thread pitch, inner diameter) are controlled within ±0.01mm, ensuring seamless mating with connected parts (e.g., pipes, connectors) and leak rates below 0.1mL/h (tested at 1.2× rated pressure).

Pressure/Load Resistance: For pressure-bearing fittings (e.g., plumbing elbows), post-molding pressure testing (1.5× rated pressure for 1 hour) confirms structural integrity—no cracking or deformation. Reinforcement ribs are molded with uniform thickness (variation ≤0.1mm) to ensure even load dispersion, supporting tensile loads up to 500N (for PA66 fittings) without failure.

Efficient Production: Multi-cavity molds (16–64 cavities, based on fitting size) maximize output. For standard 20mm pipe elbows, daily production reaches 100,000–150,000 components. Automated sorting and quality checks (via thread gauges/seal tests) reduce labor costs and ensure 99.8% defect-free output.

Cost Optimization: Hot runner systems minimize material waste; for high-volume orders (50,000+ fittings), per-unit cost can be reduced by 10–15%. Integrated molding of sealing grooves/ribs eliminates post-processing (e.g., secondary machining of threads), cutting additional costs and ensuring consistent quality.

4. Our Services: Beyond Molds—Plastic Fittings & Assembly

We provide end-to-end solutions for plastic fitting production, not just molds:

Plastic Fitting Manufacturing: Produce custom fittings in various sizes (5×5mm to 100×80mm), types (threaded, push-to-connect, snap-fit), and designs (elbows, tees, straight connectors). Supports custom thread standards (metric, imperial), color matching (RAL/Pantone codes), and surface treatments (anti-corrosion coating, matte finish).

Value-Added Assembly: Optional assembly services for fitting sub-assemblies—such as inserting metal threaded inserts (for enhanced load-bearing), installing O-rings/gaskets (for ready-to-use sealing), or assembling multi-fitting kits (e.g., plumbing repair sets, electronic connector assemblies). Delivers ready-to-integrate sub-assemblies, saving your production time.

Custom Design Support: Offer 3D mold design and rapid prototyping (via SLA 3D printing or CNC machining). We can produce 20–50 prototype fittings in 3–4 days for you to test leak performance, connection precision, and load capacity—optimizing 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.