Water Filter Molding

We specialize in manufacturing custom plastic components for water filters through advanced injection molding technologies. As a leading supplier to water purification brands, OEMs, and industrial filtration systems, we deliver precision-engineered parts that ensure leak-proof performance, chemical resistance, and long-term durability. Our services span from mold design to component assembly, empowering you to create filters tailored to residential, commercial, or medical applications.

Whether you need individual housings, cartridges, or fully assembled modules, our expertise in material science and high-volume production ensures compliance with NSF, FDA, and RoHS standards.

Key Filter Structures & Customization Options

1. Filter Housing & Canisters

Design Flexibility:

Standard Sizes: 10-inch to 20-inch housings for sediment, carbon, or RO filters.

Pressure Resistance: Reinforced ribs (3–5mm thickness) to withstand 6–10 bar operating pressure.

Transparency Options: Clear PCTG for visual monitoring of filter media, or opaque ABS for UV protection.

Material Selection:

Food-Grade Polypropylene (PP): NSF/ANSI 42 & 61 certified, ideal for cold water applications.

Polysulfone (PSU): High-temperature resistance (up to 150°C) for steam sterilization.

Glass-Filled Nylon (PA66-GF30): Enhanced rigidity for industrial high-pressure systems.

2. Filter Cartridge Frames & End Caps

Core Components:

Inner/Outer Cages: Laser-cut slots (0.5–2mm) for precise flow control.

End Cap Seals: Dual O-ring grooves or radial seals for zero-leak connections.

Material Precision:

POM (Acetal): Low moisture absorption, ensuring dimensional stability in humid environments.

TPE (Thermoplastic Elastomer): Compression-set-resistant gaskets for 10,000+ cycle durability.

3. Threaded Connections & Ports

Functional Customization:

NPT/BSF Threads: 1/4-inch to 2-inch ports for global plumbing standards.

Quick-Connect Couplings: Push-to-lock designs for tool-free installation.

Material Choices:

PPS (Polyphenylene Sulfide): Chemical inertness for aggressive water treatments (e.g., chlorine, ozone).

PVDF (Kynar®): Ultra-pure material for pharmaceutical-grade water systems.

4. Bypass Valves & Pressure Relief

Critical Safety Features:

Snap-action valves with 2–5 bar activation thresholds.

Overmolded silicone diaphragms for silent operation.

Material Durability:

PBT (Polybutylene Terephthalate): Creep-resistant under constant pressure.

LCP (Liquid Crystal Polymer): Minimal thermal expansion for precision valve seats.

Material Selection for Water Contact Safety

1. Polypropylene (PP)

Certifications:

NSF 61, FDA 21 CFR, and WRAS approval.

Advantages:

Cost-effective, weldable, and resistant to chlorine/chloramines.

Applications:

Residential filter housings, sediment pre-filters.

2. Polycarbonate (PC)

Certifications:

USP Class VI for medical devices.

Advantages:

High impact strength, transparency for visual inspection.

Applications:

UV filter chambers, transparent filter canisters.

3. PVDF & PPSU

Certifications:

ISO 10993 (Biocompatibility), 3-A Sanitary Standards.

Advantages:

Exceptional chemical resistance (acids, bases, solvents).

Autoclavable for sterile processes.

Applications:

Pharmaceutical water systems, laboratory filtration.

4. Sustainable Alternatives

Options:

Recycled PP (30–100% PCR): Reduced carbon footprint without compromising NSF compliance.

Bio-Based PE (Sugarcane-derived): Renewable resource for eco-conscious branding.

PHA (Marine-Degradable): Break down in aquatic environments for coastal applications.

Certifications:

BPI, OK Compost, and Cradle-to-Cradle Silver.

Advanced Injection Molding Capabilities

1. High-Precision Mold Design

Tooling Expertise:

Multi-cavity molds (up to 64 cavities) for scalable production.

Conformal cooling channels to eliminate warpage in thick-walled housings.

Interchangeable inserts for rapid port/thread configuration changes.

Prototyping:

SLA 3D-printed prototypes with pressure-test validation in 5 days.

2. Specialized Molding Techniques

Gas-Assisted Molding:

Hollow ribs for 20–30% weight reduction in large housings.

Two-Shot Molding:

Combine rigid PP housings with flexible TPE seals in a single cycle.

Microcellular Foaming:

Reduce material usage by 15% while maintaining burst strength.

3. Surface & Functional Treatments

Hygienic Coatings:

Antimicrobial additives (silver ions) to inhibit biofilm formation.

Hydrophilic surface treatments for reduced mineral scaling.

Aesthetic Enhancements:

In-mold labeling (IML) for permanent branding.

UV-resistant pigments for outdoor filter units.

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 water filter 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 water filter Injection Mould making

1. Samples/Drawing &Requirement from you.

2. Mould design:we will Communicate and Exchange the opinion with you after you place order.

3. Material Purchase:Steel cutting and Mould base tooling.

4. Assembling.

5. Inspection of mould : following and controlling the tooling processing.

6. Mould testing:We will inform you the date.Than will send the sample's inspection report&injection parameters with the sample to you!

7. Your instruction &confirmation for shipment.

8. Ready made mould before packing.

9. We provide any differeny kinds of plastic injection mould, blow mould, silicone mould, die casting mould service.

Plastic water filter 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 Mold base :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.