Plastic injection drone moulding

In addition, our company has established cooperative relationships with plastic raw material suppliers, printing manufacturers, etc. to ensure the supply of raw materials and printing quality. Through our rich experience and perfect supply chain, our company can provide customers with high-quality customized plastic injection drone moulding products to meet their specific needs. At the same time, we have 10 years of professional foreign trade service experience, understand the foreign trade process, and better serve our customers. For plastic injection drone moulding products, we can make corresponding plastic parts, which is mainly done through injection molds.

This is a field that demands extremely high precision, strength, weight, and efficiency, and the injection molding process is significantly different from that of ordinary consumer products.

Drone parts are diverse, including but not limited to:

Frame/Arms: Requires high rigidity and impact resistance.

Propellers: Requires extremely high balance, strength, and fatigue toughness.

Motor Mounts: Requires vibration and high-temperature resistance.

Shell/Top Cover: Requires protection for internal electronic components and aesthetic considerations.

Gears, landing gear, gimbal components, etc.

The entire process follows the same three stages, but each stage has its own unique characteristics.

Stage 1: Pre-molding Preparation

1. Material Selection (This is the most critical decision)

Drone performance is closely related to the material, and the selection process is far more complex than for ordinary products:

Nylon (PA6, PA66), especially carbon fiber-reinforced nylon (PA+CF): This is currently the preferred material for high-end drone frames and propellers. The addition of carbon fiber significantly improves the material's strength, rigidity, and heat resistance, while also inhibiting nylon's moisture absorption and ensuring dimensional stability. This is key to achieving both lightweight and high strength.

Polycarbonate (PC): Offers excellent impact resistance and transparency, and is often used for housings where internal visibility is required or for components requiring high toughness.

PC/ABS alloy: Balances the impact resistance of PC with the processability of ABS, and is often used for structural components such as housings and covers.

Polypropylene (PP): Offers low cost and excellent fatigue resistance, and can be used for internal brackets or packaging where strength requirements are less stringent.

PEEK (polyetheretherketone): Used in aerospace-grade drones, which require extreme high temperatures and high strength, but is extremely expensive.

2. Raw Material Pretreatment (Drying)

Both nylon and PC are highly hygroscopic materials. Strict drying is essential before injection molding.

Nylon (PA): Typically dried at 80-90°C for 4-6 hours, with a moisture content below 0.15%.

Polycarbonate (PC): Drying is required at 120°C for 2-4 hours, with a moisture content of less than 0.02%.

A dehumidifying dryer must be used, and the drying hopper must be directly connected to the injection molding machine's feed port to prevent the raw material from reabsorbing moisture.

3. Mold Preparation

High-Precision Molds: Drone parts require extremely tight tolerances (typically within ±0.05mm). Molds must be made of high-quality steel (such as S136 and H13) and undergo precision CNC machining and polishing.

Hot Runner Systems: Widely used to reduce runner waste, improve injection pressure transmission efficiency, and ensure consistent filling in multi-cavity molds. This is crucial for parts like propellers that require perfect dynamic balance.

Efficient Cooling System: The mold cooling channel design must be optimized to ensure rapid and uniform cooling, reducing part deformation and internal stress, which is key to ensuring dimensional accuracy.

Good Venting: High-speed injection molding can easily trap air. Therefore, appropriate venting slots must be provided on parting surfaces, ejector pins, and other locations to prevent burning and underfilling.

Phase 2: Injection Molding Cycle (High-Precision Control)

1. Mold Closing

A high-tonnage injection molding machine provides stable clamping force.

2. Injection and Holding Pressure

Temperature:

Nylon (PA+CF): Barrel temperatures are higher, typically in the 270-300°C range. High mold temperatures (80-120°C) promote crystallization and improve material properties.

PC: Barrel temperatures are 280-320°C, and high mold temperatures (80-110°C) reduce internal stress.

Speed and Pressure: High-speed, high-pressure injection is typically used to ensure complete filling of complex, thin-walled structures (such as propeller blades) and to replicate fine mold surface details. However, this must be balanced with venting.

Holding Pressure: The holding pressure profile is carefully optimized. Multi-stage holding pressure technology is often used to control dimensional shrinkage and prevent sink marks, especially in ribs and thick walls.

3. Cooling

Sufficient cooling time is required to ensure the part is fully formed upon ejection and does not deform due to ejection force or weight. Uniform cooling is particularly important for carbon fiber reinforced materials.

4. Mold Opening and Ejection

Automated part removal using a robot or manipulator ensures consistent production cycles and prevents scratches or deformation of parts caused by human contact.

Stage 3: Post-Processing and Inspection (Extreme Rigor)

Sprue Removal: When the robot removes the part, the sprue is usually trimmed or punched using a specialized jig. The sprue position requires meticulous attention, especially for propellers, which affect aerodynamic performance.

Post-Processing (Annealing):

Annealing is a standard process for nylon and PC materials, especially those with reinforced fibers.

The part is placed in an oven at a temperature 10-20°C below the material's heat distortion temperature (e.g., approximately 120-150°C for PA66) for several hours, followed by slow cooling.

Purpose: Eliminate internal stress, improve dimensional stability, and enhance chemical and impact resistance.

Mating and Assembly: Some parts (such as gearboxes) may require press-fitting bearings or metal inserts. These subsequent assembly steps must be performed in a dust-free environment.

Full Inspection and Quality Control (100% inspection is common):

Dimensional Inspection: Use a 2D image measuring machine or 3D coordinate measuring machine (CMM) to conduct full inspection or frequent spot checks of critical dimensions.

Appearance Inspection: Check for shrinkage, flash, bubbles, silver streaks, scratches, etc. under lighting.

Performance Testing (for propellers): Dynamic balancing is mandatory. Each propeller is tested on a dynamic balancing machine and polished and leveled to ensure stable flight and minimize vibration.

X-ray Inspection (for high-end applications): Used to inspect for bubbles, cracks, and even fiber distribution.

Packaging: Use anti-static bags or individually compartmentalized packaging to prevent scratches and static dust.

We are a plastic injection drone moulding manufacturer, providing high-quality plastic injection drone moulding manufacturing. As long as you want to customize/develop plastic injection drone moulding products, you can find us. We have professional injection mold design and mature manufacturing technology, providing you with one-stop service, from product design-mold making-product production-product packaging-product transportation, we can help you in every link. As long as you come to us, we will provide you with the ultimate service and satisfy you in terms of product quality, production time, information dialogue, etc.

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Factory

We are Custom Plastic Mold factory. Our factory is plastic injection mold maker. we has 17 years of experience in professional custom plastic mold and 10 years of foreign trade experience. We are custom Plastic Mold supplier. We can provide custom Plastic Mold service. Our factory can make the Injection molded plastic parts, and the quality of the products will satisfy you.

We have more than 50 high-end machines and hundreds of engineers and designers. We can provide one-stop service, from product design - mold making - product production - product packaging - transportation. We have a complete production chain. We can meet all your requirements.

Services we provide:

Professional custom mold service, Plastic mold design and manufacturing .plastic product production, product design, mold design, blow mold customization, rotational mold customization, die-casting mold customization. 3D printing services, CNC manufacturing services, product packaging, customized packaging, shipping services.

We always adhere to the principles of quality first and time first. While providing customers with the highest quality products, try to maximize the production efficiency and shorten production time. We are proud to tell every customer that our company has not lost any customer since its establishment.If there is a problem with the product, we will seek a solution actively and take responsibility to the end.

FAQ

Q1: Are you trading company or manufacturer ?

A: We are manufacturers.

Q2. When can I get the quotation?

A: We usually quote within 2 days after we get your inquiry.

If you are very urgent, please call us or tell us in your email so that we can quote for you first.

Q3. How long is the lead-time for mold?

A: It all depends on the products' size and complexity. Normally, the lead time is 25 days.

Q4. I have no 3D drawing, how should I start the new project?

A: You can supply us a molding sample, we will help you finish the 3D drawing design.

Q5. Before shipment, how to make sure the products quality?

A: If you don't come to our factory and also don't have the third party for inspection, we will be as your inspection worker.

We will supply you a video for production process detail include process report, products size structure and surface detail, packing detail and so on.

Q6. What is your payment terms?

A: Mold Payment: 40% deposit by T/T in advance, 30% second mold payment before sending out the first trial samples, 30% mold balance after you agree the final samples.

B:Production Payment: 50% deposit in advance, 50% before sending out the final goods.

Q7: How do you make our business long-term and good relationship?

A:1. We keep good quality and competitive price to ensure our customers benefit for best quality products.

2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.