Pe plastic mold

We specialize in custom PE plastic mold development, PE (Polyethylene) component production, and optional assembly services—not finished product trading. Our molds are engineered to maximize PE’s standout properties (excellent chemical resistance, flexibility, low density) while addressing its molding nuances (e.g., high shrinkage, low rigidity), delivering reliable PE parts for packaging, plumbing, consumer goods, and industrial applications.

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

PE’s unique properties (high crystallinity-induced shrinkage, low melt viscosity, flexibility) require molds that enhance its durability and adaptability for diverse use cases. Our custom mold structures include:

Cavity & Core: Machined via high-precision CNC machining (tolerance as tight as ±0.02mm) to suit PE’s needs:

Compensated cavity dimensions to account for PE’s high shrinkage (1.5–4.0%, grade-dependent)—critical for parts like pipe fittings or bottle caps, where dimensional accuracy ensures proper assembly (e.g., leak-proof pipe connections).

Uniform wall thickness (1–5mm) with rounded transitions—PE’s low rigidity makes it prone to deformation in uneven sections; consistent thickness avoids weak points in load-bearing parts (e.g., storage bin handles).

Optimized draft angles (3–5° for vertical surfaces)—PE’s flexibility and tendency to adhere to mold surfaces require larger draft angles than rigid plastics, ensuring easy demolding without tearing thin-walled parts (e.g., plastic bags, thin packaging).

Gating System: Designed for PE’s low melt viscosity (MFR 0.1–30 g/10min):

Edge gates or fan gates for large flexible parts (e.g., plastic sheets, storage bin bases)—enables rapid, uniform filling, reducing weld lines that weaken PE’s structural integrity (critical for parts needing impact resistance).

Hot runner systems with temperature control (160–200°C) for multi-cavity parts (e.g., bottle caps, small plumbing fittings)—maintains PE’s melt stability, cuts material waste by 20–25%, and eliminates cold runners that cause inconsistent shrinkage.

Cooling System: Calibrated to control PE’s fast crystallization and shrinkage:

Dense cooling channels (spaced 6–10mm apart) with adjustable temperature (20–40°C)—PE’s high crystallinity requires rapid, even cooling to minimize shrinkage variation; targeted cooling prevents warping in large flat parts (e.g., packaging trays).

Cooling inserts for thickened areas (e.g., pipe fitting joints)—reduces cooling time by 30–40%, avoiding sink marks that compromise leak-proof performance in plumbing components.

Ejection System: Suited to PE’s flexibility and low rigidity:

Wide, flat ejector pins (arranged at non-visible, high-strength areas)—distributes ejection force evenly to avoid stretching or tearing PE’s soft surface, critical for thin-walled parts like plastic bags or film-based components.

Stripper rings for cylindrical PE parts (e.g., pipes, bottle necks)—gently releases parts without deforming their circular shape, ensuring proper fit for assembly (e.g., pipe connections).

2. PE Material Variants & Their Applications

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

LDPE (Low-Density Polyethylene): Ideal for flexible, thin-walled parts (e.g., plastic bags, squeeze bottles, toy components). Offers high flexibility (Shore D 40–50), good impact resistance (even at low temperatures), and excellent chemical resistance—suitable for non-load-bearing, consumer-focused applications requiring softness and ductility.

HDPE (High-Density Polyethylene): Used for durable, semi-rigid parts (e.g., pipe fittings, storage bins, detergent bottles). Boasts higher tensile strength (28–35 MPa) and heat resistance (up to 120°C) than LDPE—handles moderate loads and withstands hot water, making it ideal for plumbing, food storage, and industrial containers.

LLDPE (Linear Low-Density Polyethylene): Perfect for stretchable or impact-resistant parts (e.g., stretch film, agricultural mulch, sports equipment components). Features enhanced stretchability (up to 800% elongation) and puncture resistance—ideal for applications needing flexibility with durability, such as packaging fragile goods or outdoor agricultural use.

MDPE (Medium-Density Polyethylene): Great for balance of flexibility and strength (e.g., gas pipes, large water containers). Combines LDPE’s flexibility with HDPE’s strength—resists pressure (up to 1.0 MPa) and environmental stress cracking, suitable for outdoor plumbing and fuel/fluid transport.

Cross-Linked PE (XLPE): Suitable for high-temperature or high-pressure parts (e.g., hot water pipes, electrical insulation sleeves). Modified via cross-linking to boost heat resistance (up to 150°C) and pressure tolerance—maintains structural integrity in harsh conditions, such as under-floor heating systems or industrial electrical applications.

3. PE Injection Molding Process: Optimized for Performance

Our injection process is fine-tuned to maximize PE’s durability, flexibility, and production efficiency, with key advantages:

Precision & Consistency:

Melt temperature control (160–220°C, grade-dependent)—PE degrades above 250°C; precise heating ensures optimal flow without material breakdown, preserving chemical resistance (critical for parts in contact with oils, detergents, or food).

Injection pressure (40–80 MPa) with slow-to-moderate speeds—balances PE’s low viscosity to avoid overfilling (which causes flash) or underfilling (which ruins dimensional accuracy), ensuring parts like pipe fittings meet leak-proof standards.

Dimensional tolerance control (±0.03mm for small parts) via servo-driven machines—essential for PE parts like bottle caps or electrical insulation sleeves, where proper fit prevents functionality issues (e.g., cap leakage, insulation failure).

Durability Enhancement:

Moisture pre-drying (not required for most PE grades)—PE has low moisture absorption (≤0.01%), eliminating pre-drying steps and reducing production time, a cost-saving advantage for high-volume parts (e.g., packaging).

Post-molding annealing (80–100°C for 1–2 hours) for high-stress parts (e.g., gas pipes)—reduces residual stress, preventing environmental stress cracking in parts exposed to chemicals or temperature fluctuations.

Efficiency & Cost-Effectiveness:

Fast cycle times (15–45 seconds per part)—PE’s low melt viscosity and fast crystallization enable rapid production; for small parts like bottle caps, multi-cavity molds (64–128 cavities) support daily output up to 150,000 components.

Low material waste—PE’s low density (0.91–0.97 g/cm³) reduces raw material costs, and hot runner systems cut scrap by 20–25%, making it an economical choice for large-volume orders.

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

We provide end-to-end solutions for PE production, tailored to flexibility and cost-efficiency needs:

PE Component Manufacturing: Produce custom PE parts in sizes (5×5mm to 2000×1000mm), shapes (pipes, packaging, containers), and finishes (matte, glossy, anti-slip). Supports food-safe certifications (FDA, EU 10/2011) for packaging and plumbing parts, and chemical resistance testing for industrial components.Value-Added Assembly: Optional assembly services for PE sub-assemblies—e.g., attaching rubber gaskets to PE pipe fittings (for enhanced leak-proofing), assembling PE storage bins with lids, or integrating PE parts with metal hardware (for structural support). Delivers ready-to-install sub-assemblies, saving your production time.Custom Design Support: Offer 3D mold design and PE prototyping (via injection molding or CNC machining). We produce 30–50 prototype parts in 2–3 days to test PE’s performance (flexibility, chemical 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.