The Application of Precision Injection Molding in the Manufacturing of Automotive Parts

2025-07-07 09:42:35 Precision Injection Molding

I. Core Advantages in Auto Manufacturing

1. High Precision and Dimensional Stability

万彩网100线路Auto parts demand strict tolerance control. Precision injection molding achieves ±0.01mm dimensional accuracy, even ±0.005mm for key components. Take new - energy vehicle battery seals as an example. Silicone seals formed by this process fit complex curves and maintain stable sealing at - 40℃ to 120℃, preventing coolant leakage and ensuring battery safety.

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2. Integrated Molding of Complex Structures

For lightweight needs, it supports multi - material co - injection and insert molding. The BMW i3’s center console frame uses long - fiber - reinforced plastic (LFT) and thin - wall plastic for one - shot molding, reducing weight by 30% while enhancing strength and assembly efficiency, cutting production costs.

3. Diverse Material Applications

Meeting “lightweight + high - performance” needs, it adapts to materials like PC - ABS alloy. After molding, it meets interior parts’ flame - retardant and impact - resistant requirements and ensures good surface gloss, boosting vehicle interior quality.

II. Typical Application Scenarios

1. Powertrain Components

In new - energy vehicles’ “three - electric” (battery, motor, electronic control) systems, it matters. Motor controller shells use thermally conductive plastic. Optimized mold cooling channels reduce thermal deformation to below 0.1%, enhancing heat dissipation for stable motor operation.

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2. Smart Cockpit Components

For integration, hidden air vents use two - color injection, integrating hard frames and flexible blades. Controlling 0.2mm gaps ensures even airflow and low noise, fitting smart cockpit comfort needs.

3. Lightweight Structural Parts

It deepens in body parts. Tesla Model Y’s sub - frame uses carbon - fiber - reinforced plastic, reducing weight by 40% vs. metal. Topology optimization improves collision energy absorption, balancing lightness and safety.

III. Technological Trends and Challenges

1. Intelligent Production Upgrade

Under Industry 4.0, AI quality inspection is introduced. Machine vision detects defects like weld lines, and smart mold temperature control boosts yield to over 99.2%, cutting manual intervention for efficient production.

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2. Green Manufacturing Requirements

Facing policies like the EU’s New Battery Regulation, bio - based materials (e.g., PLA) and physical foaming reduce carbon emissions, meeting green upgrade needs.

3. Cross - field Technology Integration

Combined with micro - nano manufacturing, it enables optical - grade surfaces. Audi’s Matrix LED headlight lenses, with Ra ≤ 0.05μm, improve light refraction for smart lighting.

IV. Future Prospects

With autonomous driving and connected cars, demand shifts to “miniaturization, integration, high performance”. By 2025, the market in new - energy vehicles may exceed 80 billion yuan. Companies must develop micro - molding and 3D printing - injection hybrid tech to stay competitive.

injection mould

Technical document

The Application of Precision Injection Molding in the Manufacturing of Automotive Parts

I. Core Advantages in Auto Manufacturing

1. High Precision and Dimensional Stability

2. Integrated Molding of Complex Structures

3. Diverse Material Applications

II. Typical Application Scenarios

1. Powertrain Components

2. Smart Cockpit Components

3. Lightweight Structural Parts

III. Technological Trends and Challenges

1. Intelligent Production Upgrade

2. Green Manufacturing Requirements

3. Cross - field Technology Integration

IV. Future Prospects

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