Dual Material Bioinert Flow Path for High Pressure LC
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Solution Overview
Problem
Conventional components for high-pressure fluid handling systems, particularly in liquid chromatography, face challenges in manufacturing and durability when handling biological samples at pressures above 1200 bar, as bioinert materials like PEEK cannot withstand such pressures alone.
Innovation Solution
A method involving the formation of a composite block by inserting a bioinert material into a high-pressure resistant casing, followed by further processing to create a flow path, ensuring mechanical stability and bioinertness, using a dual material approach with a bioinert material for the flow path and a surrounding support structure for pressure resistance up to 600 bar or more.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bioinert material (PEEK) is used for the flow path, then biochemical compatibility and inertness are improved, but pressure resistance deteriorates
Solution Approach 1:
The patent applies composite materials by combining bioinert PEEK material for the flow path with a metal support structure (stainless steel or titanium) that provides high pressure resistance. The PEEK material is inserted into a cavity formed in the metal casing, creating a composite component that simultaneously achieves biochemical compatibility from the PEEK and pressure resistance from the metal support structure, resolving the contradiction between these two opposing requirements.
Solution Approach 2:
The patent applies local quality by using different materials in different regions of the component. The flow path region is made of bioinert PEEK material to ensure biochemical compatibility, while the surrounding support structure is made of metal to provide pressure resistance. This spatial differentiation of material properties allows each region to optimize for its specific functional requirement, resolving the contradiction between biochemical compatibility and pressure resistance.
2Strength
If conventional materials are used for high pressure handling, then pressure resistance is improved, but biochemical inertness deteriorates
Solution Approach 1:
The patent uses composite materials where metal provides the pressure resistance capability and PEEK provides the biochemical inertness. The metal casing with its high mechanical strength withstands pressures up to 1200 bar, while the PEEK flow path material ensures biochemical compatibility with samples, simultaneously achieving both pressure resistance and biochemical inertness that conventional single materials cannot provide.
Solution Approach 2:
The patent applies local quality by assigning different material properties to different functional regions: the metal support structure is optimized for mechanical strength and pressure resistance, while the PEEK flow path is optimized for biochemical inertness. This regional specialization allows the component to meet both pressure resistance and biochemical inertness requirements that would be conflicting in a homogeneous material.
3Reliability
If dual material composite approach is used, then both pressure resistance and bioinertness are improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-forming a cavity in the metal casing before inserting the PEEK material. This preliminary preparation of the cavity with appropriate geometry and alignment features simplifies the subsequent assembly process, allowing the PEEK insert to be placed and secured without complex machining or alignment procedures, thereby reducing overall manufacturing complexity despite using dual materials.
Solution Approach 2:
The patent merges the manufacturing processes by integrating the PEEK insert into the metal casing to form a unified composite component. The cavity preparation, material insertion, and securing steps are combined into a streamlined manufacturing sequence that achieves both pressure resistance and bioinertness while minimizing the number of separate operations required, thus managing manufacturing complexity effectively.
Data Source
AI summary
A method of manufacturing a component having a flow path, wherein the method includes forming a high pressure resistant casing with a cavity therein, inserting a body of bioinert material into the cavity to thereby form a composite block, and further processing the composite block for at least partially forming the flow path defined by the component.