Chromatography Column Laser Welding for Adapter Plate Fixation
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Solution Overview
Problem
The challenge of securely fixing an adapter plate in a chromatography column without mechanical fastenings, especially in single-use columns, is complicated by the need for a non-toxic adhesive and the difficulty of accessing the column interior, particularly in small columns, while maintaining structural integrity and transparency.
Innovation Solution
The use of heat-fusible materials for the column component and inner wall, allowing laser welding to fuse the adapter plate to the column cylinder, ensuring a secure fixation without mechanical fastenings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If mechanical fastenings are used to fix the adapter plate, then the structural integrity is improved, but the device complexity and difficulty of disassembly for cleaning increase
Solution Approach 1:
The patent replaces mechanical fastenings (screws, clips, or other mechanical attachment means) with an adhesive bonding system. The adhesive is applied to the adapter plate or column wall and cures to form a strong chemical bond, eliminating the need for mechanical fastening components and their associated complexity while maintaining structural integrity.
2Device complexity
If adhesive is used to fix the adapter plate, then the device complexity is reduced, but the reliability of bonding deteriorates due to wet inner wall conditions and toxicity concerns
Solution Approach 1:
The patent specifies particular adhesive parameters: the adhesive must be non-toxic or low-toxicity, capable of bonding to plastic materials, and able to cure effectively in the presence of moisture rather than being inhibited by it. These parameter specifications ensure reliable bonding while addressing the previously identified concerns about toxicity and wet conditions.
3Ease of operation
If the column is made transparent for visualization, then the ease of operation is improved, but the ability to apply adhesive uniformly deteriorates due to optical interference
Solution Approach 1:
The patent extracts the adhesive application process from the visual field by positioning the application point outside the transparent column body. The adhesive is applied at the adapter plate location, which is accessible through the column opening, and then the adapter plate is inserted into the column. This separates the adhesive application operation from the transparent column structure, eliminating optical interference while maintaining visualization capability.
4Loss of time
If single-use columns are implemented, then the loss of time for cleaning and reprocessing is reduced, but the cost of the column increases due to disposable nature
Solution Approach 1:
The patent applies the disposable principle by designing the column as a single-use component that is discarded after one use, eliminating cleaning and reprocessing time. The adapter plate is integrated with or attached to this disposable column, so both are discarded together. This accepts the higher per-unit cost in exchange for eliminating time-consuming cleaning operations and ensuring consistent performance without reprocessing variability.
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
Provides a secure, cost-effective, and accessible method to fix the adapter plate within the column, enabling pre-packed columns with minimal disruption and maintaining column integrity.
Implementation Method 1
the column wall in the area of the contacting or adjacent part of the inner wall is formed from a material which allows transmission of the light energy needed to cause said fusing of the adapter plate edge region to the inner wall surface
Implementation Method 2
at least an edge region of the adapter plate is intended to be heat fusible to an inner wall surface
Implementation Method 3
at least an edge region of the adapter plate is intended to be in contact or adjacent a part of the inner wall surface in use, the edge region and the contacting or adjacent part of inner wall surface each being formed from a compatible heat fusible material or materials
Data Source
AI summary
Disclosed is a chromatographic separation column assembly (100) comprising a column cylinder (120) having a cylinder wall (126) including an inner wall surface (124) partially defining a column volume (50), and a column component (110/130) insertable into to the cylinder (120), wherein at least an edge region (113/133) of the column component is intended to be in contact or adjacent a part of the inner wall surface (124) in use, the edge region and the contacting or adjacent part of inner wall surface each being formed from a compatible heat fusible material or materials, and wherein at least the cylinder wall in the area of the contacting or adjacent part of the inner wall is formed from a material which allows transmission of the light energy needed to cause said fusing of the adapter plate edge region to the inner wall surface.