Ink Tank Flow-In Preventing Portion for Recycled Resin Molding
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Solution Overview
Problem
Conventional ink tank manufacturing processes face issues with resin components being eluted into the ink, degrading its quality, and inadequate gas barrier properties, leading to improper coupling and bonding between the container and cover members, especially when using recycled resins.
Innovation Solution
The ink housing container is designed with a cover member and container member formed using different resins, where the inner layer contacting the ink is made of a virgin resin for ink resistance and gas barrier properties, and the outer layer is made of a recycled resin, with a flow-in preventing portion on the inner layer to prevent resin from flowing into the innermost layer during molding, ensuring a smooth coupling surface and high bonding strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a multilayer injection compression molding method is used to form an ink tank with recycled resin, then environmental sustainability is improved and material cost is reduced, but resin components may be eluted into the ink degrading its quality
Solution Approach 1:
The ink tank is divided into multiple layers with different materials: an inner layer made of virgin resin that contacts the ink, and outer layers made of recycled resin. This segmentation allows each layer to perform its specific function - the inner layer protects ink quality while outer layers provide structural support and environmental benefits.
Solution Approach 2:
Different parts of the ink tank have different material qualities tailored to their specific functions. The inner surface has high chemical resistance and gas barrier properties for ink protection, while outer surfaces can use recycled resin for structural support, creating local optimization of material properties.
2Manufacturing precision
If the outer layer resin flows into the inner layer position during molding, then manufacturing completeness is improved, but the coupling surface between container and cover becomes rough reducing bonding strength
Solution Approach 1:
A flow-in preventing portion is formed on the inner layer before the outer layer molding process. This preliminary structural feature prevents the outer layer resin from flowing into the coupling surface area during injection, ensuring a smooth bonding surface is maintained before the molding process completes.
Solution Approach 2:
The flow-in preventing portion acts as an intermediary barrier between the outer layer resin and the coupling surface. It controls the flow of resin during molding, allowing the coupling surface to remain smooth and free from resin contamination while still enabling complete molding of the outer layer.
Data Source
AI summary
A present invention provides an ink housing container inhibiting a resin used to form a layer located outside the innermost layer from flowing into a position other than a predetermined one. In an ink tank having an ink container and a cover member, the ink container is formed by a plurality of layers by means of molding. A flow-in preventing portion is formed at a cover member-side end of a side wall of an inner layer one of a plurality of layers forming the ink container. The flow-in preventing portion is formed so as to project from the cover member-side end.