Mold for plastic corners

We specialize in custom mold development for plastic corners, plastic corner component production, and optional assembly services—not finished product trading. Our molds are engineered to match plastic corners’ unique needs (e.g., impact resistance, corner-fitting precision, easy installation) , with tailored designs, durable material compatibility, and optimized injection molding to deliver reliable plastic corner parts for furniture, packaging, construction, and electronics.

1. Custom Mold Structures: Tailored to Plastic Corner Requirements

Plastic corners (e.g., furniture edge corners, packaging protection corners, window frame corners) demand structural rigidity for impact protection, precise geometry to fit target edges, and often installation-friendly features—our mold structures are customized to address these key demands:

Cavity & Core: Machined via high-precision CNC machining (tolerance as tight as ±0.02mm) to replicate critical features:

Corner angle precision (90°/45°/custom angles, tolerance ±0.5°) to ensure seamless 贴合 with target edges (e.g., 90° for table corners, 45° for picture frame corners).

Reinforced impact zones (1.5–3mm thick) to enhance anti-collision performance—critical for parts like furniture corner guards, where thickened structures absorb impact force.

Installation-friendly designs (e.g., snap-fit grooves, adhesive application slots, screw holes with diameter tolerance ±0.01mm) to simplify on-site assembly.

Anti-slip textures (on inner contact surfaces, 0.1–0.2mm depth) to prevent the corner from sliding off edges during use.

Gating System: Designed to avoid weakening impact zones and visible defects:

Edge gates (positioned at non-impact, non-visible edges) for small-to-medium corners (e.g., electronics case corners)—minimizes weld lines that reduce impact resistance, a key concern for TPU or PP-based corners.

Hot runner systems (for large or multi-cavity corners, e.g., packaging bulk corners) to maintain consistent melt temperature—reduces material waste by 15–20% and ensures uniform thickness in reinforced zones.

Cooling System: Optimized for corners’ irregular angular structures:

Angular cooling channels (matching corner geometry) to ensure even heat dissipation—prevents warping of corner angles (which would ruin edge fit) and reduces cycle time by 25–35%.

Targeted cooling for thickened impact zones (e.g., corner tips) to avoid shrinkage—critical for maintaining structural integrity, as shrinkage would create weak points in anti-collision areas.

Ejection System: Calibrated to protect corner precision and surface quality:

Ejector pins (arranged at non-impact, non-contact areas) with flat tips to avoid marking outer surfaces—important for visible corners like furniture or picture frame guards.

Stripper plates (for large angular corners) to distribute ejection force evenly—prevents deformation of corner angles, ensuring consistent edge-fitting performance.

2. Suitable Plastic Materials: Matched to Plastic Corner Applications

Plastic corners face frequent impact, environmental exposure (moisture, temperature changes), and edge-fitting demands—we select materials based on protection performance, durability, and use scenarios:

PP (Polypropylene): Ideal for general-purpose corners (e.g., furniture corner guards, storage box corners). Offers good impact resistance (10–15 kJ/m²), chemical resistance (to water, mild detergents), and cost-effectiveness—suitable for indoor, low-to-medium impact scenarios (e.g., home furniture, office storage).

TPU (Thermoplastic Polyurethane): Used for flexible, high-impact corners (e.g., baby furniture corners, electronics case corners). Provides high elasticity (Shore A 50–80) to absorb impact force (reduces collision damage to both corners and objects), and good wear resistance—safe for high-contact, child-friendly environments.

ABS (Acrylonitrile Butadiene Styrene): Perfect for rigid, durable corners (e.g., packaging bulk corners, industrial equipment corners). Boasts high rigidity (Shore D 75–80) and impact resistance (15–20 kJ/m²)—withstands heavy loads and rough handling, ideal for shipping packaging or industrial equipment protection.

PVC (Polyvinyl Chloride): Great for weather-resistant corners (e.g., window frame corners, outdoor furniture corners). Features good weather resistance (no UV yellowing or moisture damage) and chemical resistance—suitable for outdoor or humid environments (e.g., balconies, gardens).

PA66 + Glass Fiber (20–30% GF): Suitable for heavy-duty industrial corners (e.g., construction site edge corners, heavy machinery corners). Reinforced with glass fiber to boost tensile strength (up to 80 MPa) and impact resistance—supports high-impact loads (20–30 kJ/m²) without breaking, ideal for harsh industrial conditions.

3. Injection Molding Process: Optimized for Plastic Corner Quality

Our injection molding process is fine-tuned to meet plastic corners’ protection, precision, and durability demands, with key advantages:

Impact Resistance Guarantee:

Injection parameters (temperature 180–260°C, pressure 60–100 MPa) optimized to enhance material density—no internal voids in reinforced impact zones, ensuring consistent anti-collision performance (each batch undergoes drop tests to confirm impact absorption).

Wall thickness control (variation ≤0.05mm) to avoid weak points—critical for corners, where uneven thickness would lead to localized breakage under impact.

Corner Precision:

Servo-driven molding machines maintain angular tolerance at ±0.5° and edge-fitting dimensional tolerance at ±0.02mm—ensures each corner fits target edges seamlessly (no gaps or forced installation).

Post-molding optical inspection checks corner angles and surface flatness—defect rate kept below 0.3%, ensuring batch consistency.

Efficient Production:

Multi-cavity molds (16–48 cavities, based on corner size) maximize output—for standard 30×30mm furniture corners, daily production reaches 80,000–120,000 components.

Automated sorting and quality checks reduce labor costs—ensures only qualified corners (meeting impact and precision standards) enter the next process.

Cost Optimization:

Hot runner systems reduce material waste by 15–20%—especially beneficial for high-cost materials like TPU or PA66+GF.

Integrated molding of installation features (e.g., snap grooves, screw holes) eliminates post-processing—cuts labor costs and ensures installation structure stability.

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

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

Plastic Corner Manufacturing: Produce custom corners in various sizes (10×10mm to 100×100mm), angles (90°/45°/custom), and designs (with/without installation features, anti-slip textures). Supports custom colors (RAL/Pantone codes) and surface treatments (matte finish, anti-scratch coating).

Value-Added Assembly: Optional assembly services for corner sub-assemblies—e.g., attaching double-sided adhesive tapes (for instant installation), assembling corner sets with protective films (for furniture shipping), or integrating rubber gaskets (for enhanced anti-slip performance). Delivers ready-to-install sub-assemblies, saving your production time.

Custom Design Support: Offer 3D mold design and rapid prototyping (via injection molding or CNC machining). We can produce 30–50 prototype corners in 2–3 days for you to test impact resistance, edge fit, and installation convenience—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.