2D Tube Capper Decapper Spindle Array
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Solution Overview
Problem
Conventional capping and de-capping processes for tubes, especially in laboratory settings, are tedious and slow due to the need for manual handling or bulky machinery, which is inefficient for processing large arrays of tubes simultaneously.
Innovation Solution
A capper/de-capper system with a rack support, a two-dimensional array of capping/de-capping spindles, and a drive mechanism that allows for simultaneous engagement and rotation of spigots or sockets with tube caps, enabling simultaneous capping or de-capping of multiple tubes, with a clutch system ensuring consistent torque application across all caps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual capping/de-capping is used, then simplicity of device is maintained, but productivity is low and processing time is long
Solution Approach 1:
The system divides the capping/de-capping function into multiple independent spindles (e.g., 8x12 array for 96 tubes), each capable of operating independently on individual tubes while being controlled by a centralized drive mechanism. This segmentation enables parallel processing of multiple tubes simultaneously, dramatically increasing productivity without requiring proportionally complex individual drive mechanisms for each spindle.
Solution Approach 2:
The spindles are designed with universal functionality to perform both capping and de-capping operations through a single integrated system. The same spindle array and drive mechanism can process tubes in either capping or de-capping mode, eliminating the need for separate dedicated devices for each function and improving overall system efficiency.
2Productivity
If a linear array of cappers/de-cappers is used, then productivity is improved, but the device becomes bulky with large footprint
Solution Approach 1:
The system transitions from a linear one-dimensional array of cappers to a two-dimensional matrix array (e.g., 8 rows by 12 columns). This dimensional change allows the spindles to be arranged in a compact grid pattern that matches the standard rack layout, enabling simultaneous processing of multiple tubes in both horizontal and vertical directions while minimizing the overall footprint of the device.
Solution Approach 2:
The spindle array is designed to nest within or align with the standard tube rack structure. The spindles are positioned to correspond with rack apertures, allowing the capping system to integrate with existing rack formats without requiring additional space. The compact arrangement of spindles in a grid pattern allows them to be closely spaced while maintaining access to each tube position.
3Ease of operation
If drive mechanisms are placed remote from spindles to accommodate close tube spacing, then tube accessibility is improved, but device complexity and footprint increase
Solution Approach 1:
The system merges the drive mechanism functions into a single centralized unit that controls all spindles simultaneously. Instead of having separate drive mechanisms for each spindle (which would increase complexity and footprint), one drive mechanism with a matrix of drive members engages multiple spindles at once, reducing overall device complexity while maintaining ease of operation.
Solution Approach 2:
A matrix of drive members acts as an intermediary between the single drive mechanism and the multiple spindles. The drive members transmit rotational force from the centralized drive mechanism to each individual spindle, enabling coordinated control of all spindles without requiring direct mechanical connection between the drive mechanism and each spindle. This intermediary system simplifies the overall mechanism while maintaining precise control.
4Manufacturing precision
If individual torque control for each spindle is implemented, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The clutch mechanism provides universal torque control functionality for all spindles through a standardized design. Each spindle incorporates the same clutch type with identical spring tension settings, ensuring consistent torque application across all caps. This universal approach maintains manufacturing precision without requiring complex individual torque control systems for each spindle.
Solution Approach 2:
The spring-loaded clutch mechanism on each spindle automatically self-regulates torque application. When the spindle engages the cap, the spring-loaded clutch slips at a predetermined torque threshold, automatically limiting the maximum torque applied to the cap. This self-service torque control eliminates the need for external torque monitoring or adjustment mechanisms, maintaining consistent cap torque while simplifying the overall control system.
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
Enables efficient and simultaneous capping or de-capping of a two-dimensional array of tubes, improving processing speed and reducing manual labor, while maintaining consistent cap torque, thus addressing the inefficiencies of existing methods.
Implementation Method 1
The clutch is spring-loaded to slip at a predetermined torque to limit the maximum torque applied to the cap
Implementation Method 2
a two-dimensional array of screw-threaded capping/de-capping spindles
Data Source
AI summary
A capper/de-capper system 1 has a rack support 10 for supporting a rack 11 containing a plurality of capped tubes 31 in a given position. A head unit 12 supports a two-dimensional array of capping/de-capping spindles 13, each of which includes a clutch 133 and a capping/de-capping spigot 131 or socket, the spindles being aligned with the tube positions defined in the rack. A drive mechanism 108 moves the tubes and the head unit relatively towards and away from one another in use, when a rack containing capped tubes is disposed in the rack support, causing engagement and disengagement of the capping/de-capping spigots or sockets with and from the tube caps 32. A spindle drive system 15-22 provides simultaneous rotation of the capping/de-capping spigots or sockets together after engagement with the caps, either to detach caps from the tubes or attach caps to the tubes.