Liquid Discharge Head Damper Segmentation for Adhesive Protection
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Solution Overview
Problem
In liquid discharge heads like ink-jet heads, adhesive protrusion during plate joining can lead to non-uniform damper deformation, affecting pressure fluctuation inhibition in manifolds, resulting in inconsistent ink discharge performance.
Innovation Solution
A liquid discharge head design featuring individual channel members with a damper configuration where first portions with short thickness inhibit pressure fluctuation, and second portions with longer thickness are joined to partitioning walls, preventing adhesive adherence to the deformable first portions, ensuring uniform damper effect across all channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plates are joined with adhesive, then the manufacturing process is simplified and assembly is easier, but adhesive may protrude and adhere to dampers, causing non-uniform deformation and inconsistent pressure fluctuation inhibition
Solution Approach 1:
The damper is divided into two distinct portions: a first portion with short thickness for pressure fluctuation inhibition, and a second portion with longer thickness for adhesive joining. This segmentation prevents adhesive from reaching the deformable first portion while maintaining the damper's functional integrity.
Solution Approach 2:
The second portion of the damper acts as an intermediary element between the adhesive and the first portion. It provides a dedicated adhesive reception area that protects the first portion from direct adhesive contact, thereby maintaining uniform deformation characteristics across all dampers.
2Ease of operation
If adhesive amount varies during plate joining, then the joining process becomes more flexible and easier to operate, but the damper deformation becomes non-uniform, affecting pressure fluctuation inhibition consistency
Solution Approach 1:
By segmenting the damper into first and second portions with different thicknesses, the design creates a dedicated zone (second portion) that absorbs adhesive variation. This ensures that even when adhesive amount varies, the first portion maintains consistent deformation characteristics for reliable pressure fluctuation inhibition.
3Speed
If the damper thickness is reduced to improve ink discharge responsiveness, then the pressure fluctuation inhibition becomes more effective, but the damper becomes more susceptible to adhesive contamination
Solution Approach 1:
The damper is segmented into a thin first portion (for rapid response and effective pressure fluctuation inhibition) and a thicker second portion (for adhesive protection). This allows the first portion to maintain small thickness for responsiveness while the second portion shields it from adhesive contamination.
Solution Approach 2:
The second portion serves as a protective intermediary that prevents adhesive from directly contacting the thin first portion. This mediator structure enables the first portion to achieve rapid ink discharge responsiveness without being vulnerable to adhesive contamination.
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 configuration ensures consistent inhibition of pressure fluctuations in manifolds, maintaining uniform ink discharge performance by preventing adhesive interference with the deformable damper portions, thus enhancing the reliability of the liquid discharge process.
Implementation Method 1
the first portions of the damper having a small thickness (the length in the third direction is short) are elastically deformable, which inhibits liquid pressure fluctuation in the first common channels
Implementation Method 2
when the first common channel member is joined to the damper with adhesive, if the adhesive protrudes from the joining surface, the adhesive would adhere to the second portion and would not adhere to the first portions
Data Source
AI summary
There is provided a liquid discharge head including: an individual channel member including individual channel rows; a first common channel member including first common channels and a first partitioning wall, and a damper joined to the first common channel member with adhesive. The damper has first portions that are elastically deformable and overlap with the first common channels and a second portion joined to the first partitioning wall and connected to the first portions. The second portion is thicker than the first portions.