Multilayer Follower Structure for Impact-Resistant Liquid Reservoir Tubes
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Solution Overview
Problem
Existing liquid reservoir tubes lack impact resistance and suffer from follower inversion and impaired drainability after impacts.
Innovation Solution
A multi-layer follower system with a viscosity difference ratio of 7% or more between layers, and a meniscus height of 3 mm or less, combined with centrifugal processing, ensures impact resistance and prevents follower inversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single-layer follower is used, then the structure is simple, but impact resistance is poor and follower inversion occurs
Solution Approach 1:
The follower is divided into multiple layers with different viscosities. The first follower layer has higher viscosity to resist impact and prevent inversion, while the second follower layer has lower viscosity to maintain drainability. This segmentation allows each layer to perform its specific function, resolving the contradiction between impact resistance and structural simplicity.
Solution Approach 2:
The invention uses composite follower structures combining materials with different viscosity characteristics. The multi-layer follower comprises a first follower layer with higher viscosity and a second follower layer with lower viscosity, creating a composite system that simultaneously provides impact resistance and maintains drainability, overcoming the limitations of single-material followers.
2Strength
If follower viscosity is increased for impact resistance, then impact resistance improves, but drainability deteriorates
Solution Approach 1:
The follower is segmented into multiple layers with different viscosity characteristics. The first follower layer (higher viscosity) provides impact resistance, while the second follower layer (lower viscosity) ensures drainability. This segmentation allows the system to simultaneously achieve both impact resistance and drainability by assigning different functional requirements to different layers.
Solution Approach 2:
Different regions of the follower have different viscosity properties tailored to their specific functions. The first follower layer contacting the liquid reservoir has higher viscosity for impact resistance, while the second follower layer has lower viscosity for maintaining drainability. This local differentiation of properties resolves the contradiction between impact resistance and drainability.
3Strength
If multi-layer follower with high viscosity difference is used, then impact resistance improves, but manufacturing precision requirements increase
Solution Approach 1:
The invention specifies a viscosity difference ratio of 7% or more between the first and second follower layers to ensure adequate impact resistance. By establishing this quantitative parameter threshold, the invention provides clear manufacturing guidance while achieving the desired impact resistance, balancing performance requirements with manufacturability.
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
The solution provides good impact resistance and maintains drainability by absorbing impact waves and preventing follower inversion.
Implementation Method 1
a viscosity difference ratio of the first follower with respect to the second follower is 7% or more... capable of providing good impact resistance... achieves good drainability even after an impact and suppresses inversion of a follower
Implementation Method 2
subjecting the liquid reservoir tube to centrifugal processing such that a centrifugal force is applied from the second follower toward the liquid to be supplied
Data Source
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AI summary
Provided is a novel liquid reservoir tube containing a liquid to be supplied, the liquid reservoir tube having a follower which can bring about satisfactory impact resistance. This liquid reservoir tube containing a liquid to be supplied includes a liquid supply part 10 and a liquid reservoir part 20, wherein the liquid reservoir part 20 accommodates, in the following order from the liquid supply part 10 side, a liquid 30 to be supplied, which is in contact with the liquid supply part 10, and a multilayer follower 40 constituted of a plurality of layers. The multilayer follower 40 at least includes a first follower 42 and a second follower 44, the first follower 42 being present further toward the liquid supply part 10 side than the second follower 44. The first follower 42 has a degree of viscosity difference between itself and the second follower 44 of 7% or greater, the degree of viscosity difference being a difference calculated from viscosities measured under the conditions of 25°C and a shear rate of 50 s-1.