Medical-grade liquid silicone overmolded onto metal side buttons

Product Overview

Shenzhen ES Electronic Co., Ltd. utilizes a liquid silicone rubber (LSR) overmolding process to encapsulate metal inserts, creating a composite structure that is "rigid on the inside and soft on the outside." The outer LSR layer provides sealing, waterproofing, and dustproofing—achieving an IP67/IP68 protection rating—while offering a soft, comfortable tactile feel with consistent rebound. The internal metal framework provides structural support and facilitates snap-fit assembly, ensuring a secure fit, uniform key travel, and enhanced fatigue resistance for the snap-fit components. Because the silicone and metal are molded into a single, integrated unit, there are no gaps, no shifting, and no risk of the silicone detaching from the metal.

Shenzhen ES Electronic Co., Ltd. employs an in-mold engraving process, where characters or icons are machined directly into the mold cavity, resulting in embossed or debossed markings on the finished LSR part. Since these markings are molded as an integral part of the silicone, there are no adhesion issues, and the text will never wear off. The markings are highly resistant to alcohol wiping, abrasion, and repeated disinfection cycles, ensuring exceptional clarity.

Shenzhen ES Electronic Co., Ltd.owns its own precision mold workshop and a 100,000-level cleanroom liquid production workshop. During the early stages of product development, the company conducts systematic evaluations and structural optimizations—focusing on factors such as metal insert positioning, wall thickness distribution, and the bonding interface—to proactively identify and prevent potential defects like molding deformation or delamination. This approach effectively improves production yields and ensures long-term reliability in the field.

Core Advantages

1.Superior Sealing for Medical Disinfection Environments: Featuring a one-piece molded design that eliminates assembly gaps, these components achieve an IP68 waterproof and dustproof rating, effectively preventing the ingress of liquids and dust. The liquid silicone material withstands repeated wiping with medical-grade disinfectants and cyclical sterilization processes, ensuring seal integrity—and reducing the risk of equipment failure—even in hospital environments subject to frequent, rigorous disinfection.

2.Exceptional Durability and Consistent Tactile Feedback: Engineered for a lifespan of 10 million presses, the design incorporates a metal skeleton that ensures uniform key travel. This prevents the keys from becoming loose or sticking over long periods of intensive use, meeting the high-durability requirements essential for medical equipment intended for years of continuous operation.

3.Customized Development with End-to-End Implementation: We offer on-demand, custom mold development—from initial 3D drawing evaluation and mold creation to mass production in a cleanroom environment. Leveraging our mature liquid silicone-over-metal molding process, we can tailor the structure and geometry of the keys to fit the specific form factor and operational requirements of any medical device. We also provide a variety of surface finishing options, including spray coating and laser engraving.

Application & Custom Service

Shenzhen ES Electronic Co., Ltd. provides custom liquid silicone-over-metal medical side buttons designed for high-end medical equipment, including patient monitors, infusion pumps, endoscope handles, surgical robot control handles, portable ultrasound devices, and ventilators.

The custom silicone-overmolded buttons offered by Shenzhen ES Electronic Co., Ltd. include silicone-over-metal buttons, silicone-over-plastic buttons, and multi-colored silicone-overmolded buttons. These solutions cater to diverse customization requirements for silicone buttons across sectors such as consumer electronics, healthcare, and the automotive industry.

Customization & Ordering Information

1.Fully Customized Products: All ES Silicone products are custom-made based on customer requirements.

2.MOQ Requirements: MOQ varies by product category, structure, and production requirements. Typically, orders start from 100 pieces.

3.Prototype & Mass Production: We support prototype validation before mass production. Reasonable prototype fees apply and may be credited for qualified projects.

4.Engineering Support: Our engineering team provides DFM evaluation to optimize product feasibility and ensure stable production.

5.More Project Cases: Website examples represent selected non-confidential projects. Contact us for more customized applications and solutions.

6.Learn More About ES Silicone: Discover our capabilities and workflow through Who We Are and How We Work.