Multi-Gate Injection Molding for Plastic Lens Barrel Stress

The patent applies segmentation by dividing the single injection gate into multiple injection gates (at least three gate vestiges). This multi-gate injection molding approach segments the material flow paths, distributing the injection pressure and material flow across multiple entry points. Consequently, the local stress concentration problem is eliminated as stress is distributed more uniformly throughout the lens barrel structure, thereby improving structural strength while maintaining manufacturing efficiency.

The patent implements local quality by positioning multiple injection gates at specific locations around the lens barrel perimeter. Each gate serves a local region, ensuring that material is injected directly where needed with appropriate pressure and flow rate. This localized material delivery improves both structural strength in critical areas and overall material distribution uniformity, while the standardized gate configuration maintains ease of manufacture.

The patent segments the single material flow path into multiple flow paths through the use of at least three injection gates distributed around the lens barrel. This segmentation ensures that molten material is injected simultaneously from multiple locations, creating uniform material distribution throughout the product. The segmented approach eliminates the uneven material flow and void formation that occur with single-gate molding, thereby improving manufacturing precision while keeping the process simple through standardized multi-gate tooling.

The patent achieves equipotentiality by strategically positioning multiple injection gates around the lens barrel perimeter such that all gates are at equivalent positions relative to the mold cavity. This equipotential configuration ensures that material flows uniformly from all gates under equal pressure conditions, resulting in homogeneous material distribution and consistent build quality throughout the lens barrel structure.

The patent segments the injection system into multiple gates while maintaining production efficiency through parallel processing. The multi-gate configuration allows material to be injected simultaneously through multiple channels, reducing cycle time and improving productivity. At the same time, the segmented material flow paths ensure uniform distribution and reduced stress concentration, thereby improving product quality stability and reducing defects without sacrificing production efficiency.

The patent applies parameter changes by modifying the injection molding parameters to accommodate multiple gates, including injection pressure, flow rate, and timing for each gate. These parameter adjustments optimize the material flow distribution across all gates, ensuring consistent quality output. The standardized multi-gate approach with optimized parameters maintains high production efficiency while significantly improving product reliability and quality stability.