Customer Background
The customer is a high-end furniture manufacturer, focusing on premium storage boxes where opening feel, smooth rebound, and long-term reliability are critical to the product experience.
The torsion spring is installed inside the box mechanism, allowing the lid or panel to rebound smoothly and consistently when opened, even after long-term use.
Challenge
The customer initially provided a spring design based on their existing structure. However, during testing, they faced several challenges:
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Rebound movement was not smooth enough
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Spring performance varied depending on installation angle
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Long-term wear affected the opening feeling
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Surface friction caused instability after repeated cycles
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Cost pressure for mass production
The key requirement was to achieve a smooth, controlled rebound with damping, while ensuring long service life and stable performance.
Hootai’s Engineering Support
Instead of simply producing the spring according to the drawing, Hootai worked closely with the customer to optimize the spring as part of the complete furniture structure.
Our support included:
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Torsion angle optimization to better match the furniture mechanism
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Structural suggestions to improve force distribution
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Evaluation of multiple surface treatment options to reduce friction and wear
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Balancing performance and cost for mass production
Surface Treatment Evaluation
To achieve the best balance between smooth operation, durability, and cost, we tested and compared several surface treatment solutions, including:
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PTFE coating
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Electropolishing
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EN-PTFE (Electroless Nickel with PTFE)
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WS₂ (Tungsten Disulfide coating)
Each option was evaluated based on:
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Friction reduction
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Wear resistance
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Visual appearance
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Cost impact
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Compatibility with the furniture structure
Final Solution & Results
After multiple rounds of testing and adjustment, we finalized a solution that perfectly matched the customer’s furniture design.
Key results:
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Smooth and controlled rebound movement
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Excellent compatibility with added damping components
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Completed 50,000+ cycles with no issues
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Stable opening feel throughout the lifecycle
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Optimized solution that reduced overall cost compared to the initial design
The customer successfully applied the solution to their high-end furniture product and moved forward with mass production.
Value Delivered to the Customer
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Improved user experience for a premium furniture product
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Reliable long-term performance
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Reduced risk during mass production
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Cost-effective solution without compromising quality