PET plastic mold

Custom PET Plastic Molds: Precision Solutions for PET Component Manufacturing

We specialize in custom PET plastic mold development, PET (Polymethyl Methacrylate, also known as Acrylic) component production, and optional assembly services—not finished product trading. Our molds are engineered to maximize PET’s exceptional properties (high light transmittance, excellent optical clarity, weather resistance) while addressing its molding challenges (e.g., internal stress, surface sensitivity), delivering high-quality PET parts for optical devices, decorative applications, electronics, and signage.

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

PET’s unique properties (high transparency, moderate melt viscosity, sensitivity to scratches) require molds that enhance its optical performance and surface quality. Our custom mold structures include:

Cavity & Core: Machined via ultra-precision CNC grinding (tolerance as tight as ±0.01mm) to suit PET’s needs:

Mirror-polished surfaces (Ra ≤0.02μm) to replicate PET’s high transparency—critical for optical parts (e.g., LED lenses, display covers) where even minor surface imperfections cause light scattering.

Uniform wall thickness (1–5mm) with gradual transitions—PET’s high melt viscosity increases risk of flow marks in uneven sections; consistent thickness also avoids internal stress concentration (a major cause of post-molding cracking).

Optimized draft angles (2–4° for vertical surfaces)—PET’s rigidity and tendency to stick to mold surfaces require sufficient draft to ensure scratch-free demolding, preserving its glossy surface.

Gating System: Designed for PET’s moderate melt viscosity (MFR 0.5–8 g/10min):

Large-diameter fan gates or edge gates (1.5–3mm) for optical parts (e.g., camera lenses)—enables smooth, low-shear flow, reducing molecular chain degradation that impairs PET’s transparency.

Hot runner systems with heated nozzles (temperature 230–250°C) for multi-cavity or large parts (e.g., signage panels)—maintains PET’s melt stability, cuts material waste by 20–25%, and eliminates cold runners that cause weld lines (which weaken optical performance).

Cooling System: Calibrated to control PET’s slow cooling rate (key for stress reduction):

Conformal cooling channels (matching part geometry) with low-temperature settings (30–50°C)—PET’s low thermal conductivity (0.19 W/m·K) requires gradual cooling to avoid internal stress; uniform heat dissipation prevents warping in large flat parts (e.g., light guide plates).

Extended cooling time (25–45 seconds)—rapid cooling locks in stress, leading to yellowing or cracking; controlled cooling preserves PET’s light transmittance (≥92%) and mechanical stability.

Ejection System: Suited to PET’s surface sensitivity and rigidity:

Polished ejector pins with rounded tips (arranged at non-visible, low-stress areas)—avoids scratching PET’s transparent surface, which is critical for optical or decorative parts.

Vacuum ejection for thin-walled PET parts (e.g., lens arrays)—gently lifts parts without applying pressure, preventing deformation that ruins optical accuracy.

2. PET Material Variants & Their Applications

PET is available in modified grades to meet specialized needs—we select the right variant based on your component’s function and environment:

General-Purpose PET: Ideal for transparent, decorative parts (e.g., acrylic display cases, cosmetic packaging, signage). Offers high light transmittance (92–93%), good weather resistance (no yellowing under UV exposure for 2+ years), and easy coloring—suitable for consumer goods requiring both clarity and aesthetic appeal.

Impact-Resistant PET: Used for durable transparent parts (e.g., automotive tail light covers, safety goggles, electronic device screens). Modified with rubber additives to boost impact strength (10–15 kJ/m²)—withstands minor shocks without shattering, making it ideal for safety-focused or outdoor applications.

Optical-Grade PET: Perfect for high-precision optical parts (e.g., LED lenses, camera viewfinders, light guide plates). Features ultra-high transparency (93–94%) and low birefringence—minimizes light distortion, critical for optical systems where image quality or light uniformity is paramount.

Flame-Retardant PET: Great for electrical/electronic parts (e.g., LED lighting housings, electrical junction box covers). Meets UL94 V-0 standards—self-extinguishes quickly and maintains structural integrity at high temperatures (up to 120°C), safe for use near electrical components.

Matte PET: Suitable for anti-glare or decorative parts (e.g., instrument panels, furniture panels, display backgrounds). Features a textured surface that reduces light reflection—ideal for applications where glare would impair visibility (e.g., automotive dashboards) or a matte aesthetic is desired.

3. PET Injection Molding Process: Optimized for Performance

Our injection process is fine-tuned to maximize PET’s optical performance and surface quality, with key advantages:

Precision & Optical Clarity:

Melt temperature control (220–260°C)—PET degrades above 280°C; precise heating ensures optimal flow without discoloration (critical for transparent parts) or molecular chain breakage (which reduces transparency).

Injection pressure (70–100 MPa) with slow injection speeds—high pressure overcomes PET’s viscosity, while slow flow reduces shear stress, preserving optical clarity and avoiding internal stress.

Dimensional tolerance control (±0.015mm for small parts) via servo-driven machines—essential for PET parts like optical lenses or light guide plates, where even tiny deviations disrupt light path or assembly.

Surface & Durability Enhancement:

Mold surface maintenance (regular polishing)—ensures cavity/core remains mirror-smooth, preventing surface defects (e.g., haze, scratches) on PET parts.

Post-molding annealing (80–100°C for 2–3 hours)—reduces internal stress by 30–40%, preventing cracking or yellowing in PET parts exposed to temperature changes (e.g., outdoor signage) or chemical cleaning.

Efficiency & Cost-Effectiveness:

Hot runner systems minimize waste—PET’s higher material cost makes waste reduction critical; 20–25% less scrap lowers per-unit costs for high-volume production.

Multi-cavity molds (4–16 cavities for small optical parts)—PET’s controlled flow via hot runners ensures uniform part quality across cavities, with daily output up to 15,000 parts for standard lens designs.

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

We provide end-to-end solutions for PET production, tailored to optical and decorative needs:

PET Component Manufacturing: Produce custom PET parts in sizes (5×5mm to 1000×800mm), shapes (lenses, panels, decorative trims), and finishes (transparent, colored, matte). Supports optical testing (transmittance, birefringence) for precision parts and color matching (RAL/Pantone codes) for decorative applications.

Value-Added Assembly: Optional assembly services for PET sub-assemblies—e.g., bonding PET lenses to metal frames (for lighting systems), attaching anti-glare coatings (for display screens), or assembling multi-part PET signage (with LED integration). Delivers ready-to-install sub-assemblies, saving your production time.

Custom Design Support: Offer 3D mold design and PET prototyping (via injection molding or CNC machining). We produce 10–30 prototype parts in 4–6 days to test PET’s performance (transparency, impact resistance, optical uniformity) 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.