Modular Tool Handle with Air Gap for Autoclave Sterilization
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Solution Overview
Problem
Existing handles for medical tools sterilized in autoclaves face inefficiencies due to the insulating properties of molded materials, which hinder heat transfer and prevent complete sterilization of the handle core.
Innovation Solution
A handle design featuring a central core made of a heat-conducting material within a thin-walled, heat-tolerant sleeve with a consistent exterior insulating layer, creating an air space for enhanced heat transfer and using a simple core configuration for various mechanisms, allowing effective sterilization in autoclaves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a molded material layer is formed directly around the exterior of the core to provide grip and aesthetic characteristics, then the handle achieves desired comfort and appearance, but the insulating properties of the molded material inhibit heat transfer and prevent effective sterilization of the core
Solution Approach 1:
The handle is divided into distinct segments: a core component and a separate molded material layer. This segmentation allows the core to be sterilized independently while the molded layer provides grip characteristics, resolving the contradiction between comfort and sterilization effectiveness.
Solution Approach 2:
An intermediary structure (adhesive layer or interface) is introduced between the core and the molded material layer. This intermediary facilitates heat transfer from the core to the molded layer during sterilization while maintaining the grip characteristics of the molded material.
2Manufacturing precision
If the core is intricately cut in multiple sequential steps to accommodate specific component configurations, then the desired shape and functionality are achieved, but the manufacturing costs and time are greatly increased
Solution Approach 1:
The core is pre-configured with standardized features and mounting structures before the molded material layer is applied. This preliminary action allows for rapid assembly of different components without requiring intricate cutting for each specific configuration, thereby reducing manufacturing time while maintaining precision.
3Shape
If the molded layer is formed in varying thicknesses on the exterior of the core to provide desired shape and grip, then the aesthetic and ergonomic characteristics are achieved, but the heat transfer to the core is further inhibited
Solution Approach 1:
The molded material layer is designed with varying thicknesses at different locations: thinner regions at the ends of the core where heat transfer is critical, and thicker regions in the middle sections where grip and aesthetic characteristics are prioritized. This local quality variation ensures effective sterilization while maintaining ergonomic performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design ensures rapid and thorough sterilization of the handle core and entire handle, reducing manufacturing complexity and time while maintaining desired grip and aesthetic characteristics.
Implementation Method 1
the core and sleeve define an air space between the core and the sleeve that enables more effective heat transfer along the entire length of the core
Implementation Method 2
an outer skin formed of the moldable, insulating material, such as silicone, placed on the exterior of the sleeve
Data Source
AI summary
A handle for a tool is provided that is formed of a core positioned within a sleeve of a temperature resistant material to form a handle with a space between the core and the sleeve. The core can be formed by machining a metal material while the sleeve and an optional skin positioned on the sleeve can be molded. The materials forming the sleeve and skin, and the space formed between the core and sleeve, create a handle that can be adapted to form a variety of different tools with different mechanisms located in the core that also has improved heat transfer characteristics for sterilization purposes.