TPU plastic mold

Custom TPU Plastic Molds: Precision Solutions for TPU Component ManufacturingWe specialize in custom TPU plastic mold development, TPU (Thermoplastic Polyurethane) component production, and optional assembly services—not finished product trading. Our molds are engineered to maximize TPU’s standout properties (high elasticity, excellent wear resistance, oil/chemical resistance) while addressing its molding challenges (e.g., high-temperature degradation, viscosity fluctuations), delivering high-performance TPU parts for sports equipment, industrial seals, consumer electronics, and automotive applications.

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

TPU’s unique properties (adjustable hardness, high tensile strength) require molds that enhance its durability and adaptability for high-stress use cases. Our custom mold structures include:

Cavity & Core: Machined via high-precision CNC machining (tolerance as tight as ±0.015mm) to suit TPU’s needs:

Wear-resistant mold steels (e.g., H13, S136) for high-hardness TPU grades (Shore D ≥60)—TPU’s abrasiveness (especially when filled with additives) can wear molds quickly; durable steels extend mold lifespan by 30–40%, critical for high-volume production of parts like industrial rollers or sports shoe soles.

Uniform wall thickness (0.8–5mm) with gradual transitions—TPU’s high elasticity makes it prone to stress concentration in uneven sections; consistent thickness avoids tearing at thin edges (e.g., seal lips) and ensures uniform rebound performance.

Optimized draft angles (2–4° for vertical surfaces)—TPU’s moderate rigidity and tendency to stick to mold surfaces require balanced draft angles; too small causes demolding damage, too large compromises precision for fit-critical parts (e.g., automotive gaskets).

Gating System: Designed for TPU’s variable melt viscosity (MFR 1–20 g/10min, hardness-dependent):

Large-diameter edge gates or fan gates (1–2mm) for thick-walled TPU parts (e.g., sports equipment handles, industrial bumpers)—enables smooth filling, reducing weld lines that weaken TPU’s tensile strength (critical for load-bearing parts).

Hot runner systems with temperature control (180–220°C) for multi-cavity parts (e.g., O-rings, micro-seals)—maintains TPU’s melt stability, cuts material waste by 20–25%, and eliminates cold runners that cause inconsistent hardness across batches.

Cooling System: Calibrated to control TPU’s crystallization and avoid degradation:

Evenly spaced cooling channels (8–12mm apart) with adjustable temperature (30–50°C)—TPU’s slow crystallization (vs. TPE) requires controlled cooling to preserve elasticity; rapid cooling makes TPU brittle, while overheating causes yellowing or degradation.

Cooling inserts for thickened TPU areas (e.g., bumper corners, seal bosses)—reduces cooling time by 30–35%, avoiding sink marks that compromise sealing performance (e.g., industrial valve seals) or structural integrity.

Ejection System: Suited to TPU’s elasticity and surface quality needs:

Polished ejector pins (arranged at non-functional areas) with rounded tips—avoids marking TPU’s surface, which is important for visible parts like consumer electronics cases or sports equipment.

Stripper rings for cylindrical TPU parts (e.g., rollers, tubes)—distributes ejection force evenly, preventing deformation of TPU’s circular shape (critical for parts requiring precise dimensional fit, such as bearing sleeves).

2. TPU Material Variants & Their Applications

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

General-Purpose TPU (GP-TPU): Ideal for consumer soft-touch parts (e.g., phone case edges, tablet grips). Offers adjustable Shore A hardness (50–90), good elasticity (≥400% elongation), and cost-effectiveness—suitable for low-to-medium stress applications where tactile feel and basic durability are required.

Wear-Resistant TPU: Used for high-abrasion parts (e.g., sports shoe soles, industrial conveyor rollers). Modified with carbon black or ceramic particles to boost wear resistance (10–15% lower wear rate than GP-TPU)—withstands frequent friction without surface damage, ideal for high-use parts.

Oil/Chemical-Resistant TPU: Perfect for industrial seals and gaskets (e.g., hydraulic valve seals, fuel system gaskets). Resists mineral oils, fuels, and mild acids—maintains elasticity and sealing performance in harsh chemical environments, meeting industrial standards (e.g., ISO 1879 for oil resistance).

High-Temperature TPU: Great for automotive and industrial parts (e.g., engine bay gaskets, high-temperature rollers). Withstands continuous use at 120–150°C (vs. 80–100°C for GP-TPU)—retains elasticity and structural integrity near heat sources, suitable for under-hood or industrial heating applications.

Transparent TPU: Suitable for aesthetic and functional parts (e.g., clear phone cases, medical device components). Offers high light transmittance (85–90%) and good impact resistance—combines visibility with durability, ideal for parts where both appearance and protection matter (e.g., clear protective covers).

3. TPU Injection Molding Process: Optimized for Performance

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

Precision & Consistency:

Melt temperature control (180–230°C, hardness-dependent)—TPU degrades above 250°C; precise heating ensures optimal flow without molecular breakdown, preserving tensile strength (up to 60 MPa for high-grade TPU) and elasticity.

Injection pressure (60–100 MPa) with adaptive speed control—TPU’s viscosity varies with hardness; softer grades (Shore A ≤50) need lower pressure to avoid overfilling, harder grades (Shore D ≥60) require higher pressure for full cavity filling, ensuring uniform part density.

Dimensional tolerance control (±0.02mm for small parts) via servo-driven machines—critical for TPU parts like automotive gaskets or industrial seals, where even tiny deviations cause leaks or fit issues.

Durability Enhancement:

Moisture pre-drying (80–100°C for 3–4 hours)—TPU absorbs moisture easily, which causes bubbles and internal defects; pre-drying ensures parts have no voids, preserving wear resistance and sealing performance.

Post-molding annealing (90–110°C for 1–2 hours)—reduces residual stress by 25–30%, preventing cracking in TPU parts exposed to temperature cycles (e.g., automotive parts in extreme weather).

Efficiency & Cost-Effectiveness:

Fast cycle times (20–40 seconds per part)—TPU’s moderate crystallization rate balances production speed and quality; for small parts like O-rings, multi-cavity molds (32–64 cavities) support daily output up to 100,000 components.

Scrap recycling (up to 25% of raw material)—TPU’s thermoplastic nature allows reprocessing of scrap, reducing waste and lowering per-unit costs for large orders (50,000+ parts).

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

We provide end-to-end solutions for TPU production, tailored to high-performance needs:

TPU Component Manufacturing: Produce custom TPU parts in sizes (5×5mm to 800×500mm), shapes (seals, gaskets, rollers, grips), and hardness (Shore A 50–Shore D 80). Supports surface treatments (e.g., anti-slip texture, UV-resistant coating) and testing (wear resistance, oil resistance) for industrial-grade parts.

Value-Added Assembly: Optional assembly services for TPU sub-assemblies—e.g., bonding TPU seals to metal flanges (for industrial valves), overmolding TPU onto plastic frames (for sports equipment handles), or assembling TPU-based kits (e.g., automotive gasket sets). Delivers ready-to-install sub-assemblies, saving your production time.

Custom Design Support: Offer 3D mold design and TPU prototyping (via injection molding or CNC machining). We produce 20–50 prototype parts in 3–4 days to test TPU’s performance (tensile strength, wear resistance, sealing ability) 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.