Medical Instrument Silicone Pad

The client commissioned Rayboen to develop a medical-grade silicone protective ring pad for surgical instruments. This product needed to meet the client’s core requirements and stringent medical standards, encompassing high-temperature sterilization resistance, high precision, durability, while balancing mass production capability with cost-effectiveness. Rayboen provided corresponding formulations, processes, and customized solutions to ensure compliance with various regulatory requirements and enable large-scale production.

1.Initiation and Planning

• Defined core specifications including instrument dimensions, load-bearing capacity, sterilization method, as well as cushioning and abrasion resistance requirements.
• Reviewed client 3D CAD models and optimized slots, edge wrapping.
• Selected medical-grade liquid silicone rubber (LSR) to ensure biocompatibility and sterilization resistance.

2.Development and Implementation

• Mold Design: High-precision mold steel was used to fabricate the LSR injection mold. Mold flow analysis was conducted to prevent trapped air and short shots.2.Prototype Validation & Testing
• Prototype Validation: Functional prototypes were created via 3D printing to validate fit and cushioning performance. Following small-scale trial molding, mechanical performance, abrasion resistance, and sterilization cycle tests were conducted.
• LSR Injection Molding Production: A cold runner system was employed to ensure material flowability. Injection parameters were optimized, and a standardized quality inspection system was established.

3.Challenges and Solutions

• Uneven Filling and Trapped Air: Optimized venting and injection parameters to ensure uniform material filling.
• Dimensional Precision: High-precision CNC machining was used for mold fabrication, with optimized shrinkage compensation to ensure a tight fit with the metal tray.
• Sterilization Resistance and Durability: Selected aging-resistant medical-grade LSR and optimized the vulcanization process to ensure stable performance after more than 50 sterilization cycles.
• Production Consistency: Solidified process parameters, implemented first-article inspection, in-process inspection, and finished product full inspection, complemented by automated post-processing.

4.Project Outcomes

The silicone protective ring pad delivered by Rayboen features soft cushioning, anti-slip and noise-reducing properties, resistance to repeated sterilization, and precise dimensions. It effectively reduces instrument damage and operational noise, enhancing operating room safety. The project encompassed the entire process from design and mold development to large-scale delivery, fulfilling the client’s requirements for clinical use and volume supply.