Inkjet Head Assembly Jig for Uniform Adhesive Curing
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Solution Overview
Problem
The varying thickness of the adhesive agent in existing inkjet head assemblies reduces the positional accuracy of ink droplets, leading to deteriorated printing quality due to inconsistent distances from the fixing plate to the ink discharge surface.
Innovation Solution
A method of manufacturing an inkjet head where the distance from the fixing plate to the ink discharge surface is maintained constant by using a jig to ensure uniform adhesive application and curing, ensuring consistent ink flow channel formation across multiple plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive agent is applied to join plates in inkjet head assembly, then the plates are connected and assembled, but the thickness of adhesive varies causing inconsistent distance from fixing plate to ink discharge surface
Solution Approach 1:
A jig is introduced as an intermediary tool during the assembly process. The jig includes positioning protrusions that fit into corresponding recesses on the plates, and abutment portions that contact the fixing plate. This intermediary device ensures consistent positioning and spacing, maintaining a constant distance from the fixing plate to the ink discharge surface while still allowing adhesive application for plate connection.
Solution Approach 2:
The invention changes the parameter of adhesive thickness control by using the jig's physical structure (abutment portions and positioning protrusions) to constrain the assembly. The jig transforms the variable adhesive thickness into a controlled parameter by providing mechanical stops and alignment features, ensuring that the distance from the fixing plate to the ink discharge surface remains constant across all assembled units.
2Ease of manufacture
If adhesive thickness varies between inkjet heads, then assembly is flexible and easy to manufacture, but positional accuracy of ink droplets deteriorates
Solution Approach 1:
The jig serves as a mediator that decouples the assembly flexibility from positional accuracy. During manufacturing, the jig provides rigid positioning to ensure accurate droplet placement. The flexibility is maintained in the adhesive application process itself, but the jig's positioning protrusions and abutment portions ensure that regardless of minor adhesive thickness variations, the final assembled position maintains consistent droplet placement accuracy.
3Device complexity
If plates are joined with adhesive agent without positioning constraints, then assembly process is simple, but distance from fixing plate to ink discharge surface becomes inconsistent
Solution Approach 1:
The jig is a relatively simple intermediary device that does not significantly complicate the assembly process. It includes basic features like positioning protrusions, recesses, and abutment portions that can be easily integrated into the existing assembly workflow. The jig maintains a constant distance from the fixing plate to the ink discharge surface by providing mechanical constraints, while the adhesive application process remains straightforward.
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 approach stabilizes the printing quality by maintaining a uniform distance from the fixing plate to the ink discharge surface, reducing variations in ink droplet landing and enhancing positional accuracy.
Implementation Method 1
applying an adhesive agent to at least a first one of the plurality of plates... contacting the first of the plurality of plates and a second of the plurality of plates... curing the adhesive agent
Data Source
AI summary
In order to manufacture an ink-jet head, a head body and a reservoir unit are formed first. Then, UV-cured resin is applied on the lower surface of the reservoir unit. Then, the head body is placed on a plane of a jig so that the plane abuts against the ink discharge surface. Then, the reservoir unit is positioned with respect to the head body and the jig so that an ink reservoir of the reservoir unit and ink flow channels of a flow channel unit are brought into communication and the both ends in the longitudinal direction of a reservoir base plate and the upper surfaces of walls oppose to each other, and the reservoir unit is laminated on upper surface of the flow channel unit via the UV-cured resin. Subsequently, the UV-cured resin is cured in a state in which the lower surface of the reservoir base plate abuts against the upper surfaces of the walls.