Resin Tank Barrier Layer Anti-Roll Design
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Solution Overview
Problem
In resin tanks, the barrier layer tends to roll up after molding, and there is a risk of contact between the oil filling nozzle and the barrier layer during oil filling, which compromises the durability and protection of the barrier layer.
Innovation Solution
A resin tank design with a barrier layer featuring an opening part and a thick part at the outer peripheral area, where the barrier layer and the casting flange part at the oil filling port tubular part are molded together, incorporating a guide wall and recessed groove to guide the nozzle and protect the barrier layer, and a mouth fitting member with a restricting part to prevent nozzle contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the barrier layer is integrated with the tank body through blow molding, then the barrier layer is protected from rolling up, but the manufacturing process becomes complex and time-consuming
Solution Approach 1:
The barrier layer is pre-formed as a separate component with a recessed groove at its edge before being integrated with the tank body. This preliminary preparation allows the barrier layer to be quickly positioned and fixed during the molding process, preventing rolling up while maintaining efficient manufacturing
Solution Approach 2:
The barrier layer is inserted into a thick part of the resin layer at the oil filling port tubular part during the molding process. The barrier layer is nested within the tank body structure, specifically positioned at the thick part region, which secures it against rolling up while integrating it into the overall tank structure
2Reliability
If the barrier layer is provided on the inner surface of the tank body, then fuel transmittance is reduced, but the barrier layer is at risk of contact with the oil filling nozzle
Solution Approach 1:
The barrier layer is selectively positioned at the thick part of the resin layer at the oil filling port tubular part, where it provides enhanced fuel containment locally. The recessed groove at the edge of the barrier layer creates a protective depression that prevents the oil filling nozzle from making direct contact with the barrier layer surface during fuel filling operations
3Ease of manufacture
If the barrier layer edge is left uncovered after molding, then the manufacturing process is simplified, but the barrier layer is likely to roll up
Solution Approach 1:
The barrier layer is pre-formed with a recessed groove at its edge before integration with the tank body. This preliminary structural feature ensures that when the barrier layer is positioned at the thick part during molding, the recessed groove engages with the surrounding resin material to prevent rolling up, while still allowing for relatively simple manufacturing processes
Data Source
AI summary
A tank made of resin provided with a barrier layer, which prevents the barrier layer from rolling up and has improved durability. In a tank made of resin that includes a barrier layer provided on an inner surface of a tank body made of resin, an opening part is provided in the barrier layer, a thick part projecting toward an inside or an outside of the tank body is provided in a resin layer at an outer peripheral part of the opening part, and the barrier layer and a casting flange part at a base of an oil filling port tubular part are molded with the resin of the tank body in a state in which the casting flange part is located at the thick part.