Cartridge Heat Welding Projection Segmentation for Adhesion Stability
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Solution Overview
Problem
In heat welding of cartridges for printing apparatuses, the melting and solidification of materials during the welding process can lead to unstable adhesion issues, causing the melted material to peel off and potentially leak ink due to gaps between the liquid introduction and supply portions, resulting in ink leakage.
Innovation Solution
The implementation of a method involving a cartridge design with multiple welding projection portions and heat welding portions arranged along the edge of an opening, where the sheet covers the opening and is bonded to the welding projections, preventing material from entering the opening and ensuring proper adhesion by spacing heat welding portions apart to minimize gap formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If heat welding is performed by a welding member on a projection portion covered with a film, then the wall of the adapter is prevented from being recessed by melting, but the projection portion in contact with the film may be melted and flow into a stepped portion, causing unstable adhesion
Solution Approach 1:
The projection portion is divided into multiple segments: a first projection portion that contacts the welding member, a second projection portion that contacts the film, and a stepped portion connecting them. This segmentation allows controlled melting and flow of material into the stepped portion to create stable adhesion between the film and the adapter wall.
2Strength
If the projection portion melts and flows into the stepped portion, then adhesion is formed, but the material may solidify in an unstable state that does not adhere to the stepped portion, causing peeling off
Solution Approach 1:
The welding member applies controlled heat to melt the first projection portion, changing its physical state from solid to liquid. The melted material then flows into the stepped portion and solidifies, creating a stable adhesive bond. The parameters of heat application and material flow are controlled to ensure proper adhesion.
3Reliability
If material peels off from the wall while adhering to the film, then the material may enter the opening portion and adhere to the liquid supply portion, but proper adhesion should be maintained
Solution Approach 1:
The stepped portion acts as an intermediary structure between the first projection portion and the second projection portion. It provides a controlled path for melted material to flow into, ensuring that material solidifies in a stable adhesive state rather than peeling off and contaminating the opening portion.
4Reliability
If a gap is generated between the liquid introduction portion and the liquid supply portion, then ink leakage occurs, but proper contact should be maintained
Solution Approach 1:
The film is attached to the adapter wall through heat welding of the projection portions before the cartridge is assembled with the liquid introduction portion. This preliminary bonding ensures that the film is securely fixed, preventing gaps that would allow ink leakage when the liquid introduction portion is inserted.
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 design enhances the adhesion between the cartridge components, reduces the likelihood of ink leakage by maintaining a secure seal, and prevents foreign matter from entering the opening, thereby ensuring reliable operation of the printing apparatus.
Implementation Method 1
heat welding by a welding member
Implementation Method 2
a portion that melts and flows into the stepped portion
Implementation Method 3
the melted portion flows into a stepped portion of the first attachment portion. Since direct heat is not applied to the stepped portion by the welding member, the temperature during heat welding is lower than that of the portion of the first attachment portion in contact with the welding member. Therefore, the portion that melts and flows into the stepped portion may be solidified
Data Source
AI summary
A liquid accommodation portion, a liquid supply portion, an accommodation portion including a wall portion, a plurality of welding projection portions, and a plurality of heat welding portions attached to a portion of a surface of the plurality of welding projection portions and disposed in a state of being spaced apart, and a sheet bonded to the plurality of welding projection portions configured to be peeled off, while covering the opening, the plurality of welding projection portions, and the plurality of heat welding portions are provided, in which the plurality of welding projection portions are portions not melted by heat welding among projection portions made of a material configured to be heat-welded, and the plurality of heat welding portions are portions formed by being melted by heat welding among the projection portions before being heat-welded to the sheet, and a portion of which are in contact with the sheet.