A method for preparing a silicone-based rigid-flexible coupling pneumatic soft finger

CN122253380APending Publication Date: 2026-06-23SUN YAT SEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUN YAT SEN UNIV
Filing Date
2026-05-14
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing pneumatic soft fingers have low stiffness, insufficient accuracy of flexible tensile strain sensors, and problems with the use of adhesives affecting the performance of silicone.

Method used

By employing a step-by-step manufacturing and secondary casting method, the silicone gas distribution base layer, silicone pneumatic expansion joint structure, and rigid skeleton are bonded together to form a semi-finished product. This semi-finished product is then placed into a mold along with a flexible tensile strain sensor for overall silicone encapsulation, ensuring rigid-flexible coupling and sensor internal integration.

Benefits of technology

It achieves uniform finger texture, smooth surface, and integrated structure. The sensor is not affected by external interference, improving detection accuracy. It avoids the influence of glue on silicone performance and enhances overall rigidity and detection accuracy.

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Abstract

The application discloses a preparation method of a silica gel-based rigid-flexible coupling pneumatic soft body finger, which comprises the following steps: firstly, preparing a silica gel gas distribution base layer and a silica gel pneumatic expansion joint structure; then, bonding the silica gel gas distribution base layer, the silica gel pneumatic expansion joint structure and a rigid framework into a semi-finished product pneumatic soft body finger; placing the semi-finished product pneumatic soft body finger into a pneumatic soft body finger mold, and placing a flexible tensile strain sensor on the palm of the semi-finished product pneumatic soft body finger, and placing the electric signal lead wire of the flexible tensile strain sensor outside the pneumatic soft body finger mold; finally, injecting silica gel into the pneumatic soft body finger mold to coat the semi-finished product pneumatic soft body finger and the flexible tensile strain sensor into an integral whole by using the silica gel.
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