1. Project Background

In automotive interior manufacturing, wrapping processes are widely used for dashboard trims, door panels, and A/B/C pillar interior parts.
In this project, the customer produces both stitched and non-stitched interior components. During mass production, the original process showed poor consistency and a high rejection rate.

2. Customer Pain Points

• Stitching misalignment after wrapping, affecting appearance quality
• Same process used for stitched and non-stitched parts, causing instability
• Heavy dependence on operator experienc
• Difficult to balance cycle time and quality in automated production

(Non-Stitched Component)

(Stitched Interior Component 1)

(Stitched Interior Component 2)

3. Non-Stitched Parts Covering Process

Process Flow

Adhesive spraying → Drying →Heat pressing+ Automatic wrapping → Trimming

For non-stitched automotive interior parts, the key focus is surface adhesion and edge wrapping quality. Since there is no visible stitching, the material can be directly processed by the automatic wrapping machine.

4. Stitched Parts Covering Process (Key Difference)

Process Flow

Adhesive spraying → Drying → Pre-wrapping alignment → Heat pressing+ Automatic wrapping  → Trimming

Pre-Wrapping Alignment Station (Critical Process)

For stitched interior parts, a pre-wrapping alignment station is added before the automatic wrapping process. The stitching is accurately aligned with the product reference line and fixed in advance, preventing displacement during wrapping.

5. Key Process Considerations

• Stitched parts should not skip the pre-wrapping process
• Mold pressure must be optimized around stitching areas
• Different process programs should be used for stitched and non-stitched parts

6. Project Results

• Significantly improved stitching alignment consistency
• Reduced rejection rate
• Stable cycle time with higher automation
• Standardized process, easy to replicate for other projects

7. Solution Summary

By customizing the covering process based on product structure, this project delivers a one-stop automotive interior wrapping machine solution, effectively solving the key challenges of stitched parts in automated production.

For more information about similar automotive interior wrapping solutions, please visit the official website of Huazhuo Automation