Liquid Container Bypass Injection Manufacturing
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Solution Overview
Problem
Existing ink cartridges face inefficiencies in ink injection and resource utilization, particularly when residual ink levels are low, leading to wasteful disposal and complex manufacturing processes due to the need for an ink injecting-only hole.
Innovation Solution
A method for manufacturing liquid containers that uses the liquid supply port to bypass the differential pressure valve, allowing for easy and efficient ink injection into the containing chamber without an ink injecting-only hole, by forming a bypass flow passage between the supply port and containing chamber sides, and blocking it post-injection to prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an ink injecting-only hole is formed in the container body to inject ink into the ink containing chamber, then ink injection can be achieved, but the manufacturing process becomes complicated and the number of components increases
Solution Approach 1:
The ink supply port is designed to serve dual purposes: it functions as the ink supply interface during normal operation and as the ink injection port during manufacturing. This eliminates the need for a separate ink injecting-only hole, simplifying the container structure and manufacturing process while reducing the number of components required
Solution Approach 2:
The function of ink injection is extracted from a separate dedicated hole and integrated into the existing ink supply port. This consolidation removes the complexity associated with creating and sealing a separate injection hole, while maintaining the integrity of the ink containment system
2Reliability
If the ink cartridge is disposed of when residual ink decreases to a very small amount, then the ink supply can be ensured, but resource waste occurs
Solution Approach 1:
The container body is designed to be separable from the lid, allowing the lid (which contains the differential pressure valve and flow passages) to be recovered and reused. When the container body is emptied, a new container body can be attached to the same lid, enabling multiple uses of the lid component and reducing overall resource waste
Solution Approach 2:
The ink cartridge is divided into separable components: the container body and the lid. This segmentation allows the lid to be detached and reused with a new container body, extending the usable life of the more complex components while disposing only of the simpler container body
3Reliability
If a sealing film is attached after ink injection to seal the ink injecting-only hole, then leakage is prevented, but the manufacturing process is complicated
Solution Approach 1:
The ink supply port's sealing mechanism serves dual functions: it seals the port during storage to prevent leakage and allows controlled opening for ink injection during manufacturing. This integrated approach eliminates the need for separate sealing films and additional manufacturing steps, simplifying the process while maintaining reliable leakage prevention
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 enables the reuse of ink cartridges by re-injecting ink through the supply port, reducing waste and simplifying the manufacturing process by eliminating the need for an additional injection hole, while ensuring effective ink distribution and preventing leakage.
Implementation Method 1
a differential pressure valve, which is interposed in the way of the ink flow passage, is normally urged to a closed state while changed to an opened state when a differential pressure between a side of the ink supply port and a side of the ink containing chamber is equal to or more than a predetermined value
Implementation Method 2
injecting the liquid into the liquid containing chamber from the liquid supply port via the supply port side flow passage, the bypass flow passage, and the containing chamber side flow passage
Data Source
AI summary
A method of manufacturing a liquid container, the liquid container including a liquid containing chamber in which a liquid can be contained, an air communicating passage allowing the liquid containing chamber to communicate with air, a liquid supply port for supplying the liquid contained in the liquid container to an outside, a liquid flow passage allowing the liquid container and the liquid supply port to communicate with each other, a differential pressure valve which is disposed in the liquid flow passage, which is normally urged to a closed state, and which is changed to an opened state when a differential pressure between a side of the liquid supply port and a side of the liquid containing chamber is equal to or more than a predetermined value, and a blocked portion formed by closing a bypass flow passage allowing a supply port side flow passage that is closer to the liquid supply port than the differential pressure valve to communicate with a containing chamber side flow passage that is closer to the liquid containing chamber than the differential pressure valve, so as to bypass the differential pressure valve, the method includes; opening at least a part of the blocked portion so as to form the bypass flow passage; injecting the liquid into the liquid containing chamber from the liquid supply port via the supply port side flow passage, the bypass flow passage, and the containing chamber side flow passage; and blocking the bypass flow passage after injecting the liquid.