Fuel Tank Foam Insulation Monolithic Bonding
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Solution Overview
Problem
Existing methods for producing insulated fuel tanks are complex and prone to noise issues due to relative movement between the fuel tank container and insulation.
Innovation Solution
A method involving placing a fuel tank container into a foam-encapsulating mold, where the container and insulation fuse together while still hot, forming a monolithic bond and eliminating the need for separate molds, using the cooling mold of the blow-molding process for foam encapsulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If foam insulation is applied separately to the fuel tank container, then insulation performance is improved, but device complexity increases and relative movement causes noise
Solution Approach 1:
The patent combines the fuel tank container and foam insulation into a single integrated structure produced in one blow-molding process. The foam insulation is formed directly within the mold cavity during the same process that forms the container, eliminating separate application steps and reducing equipment complexity while preventing relative movement between components.
Solution Approach 2:
The foam insulation is prepared and positioned within the mold cavity before the actual blow-molding process begins. This preliminary preparation ensures that when the plastic material is injected, the insulation is already in place to receive and bond with the material, streamlining the overall production process.
2Manufacturing precision
If separate molding processes are used for container and insulation, then manufacturing precision can be controlled, but productivity decreases
Solution Approach 1:
The patent merges the container forming and insulation forming operations into a single simultaneous blow-molding process. Both components are created in one continuous operation within the same mold, eliminating the need for separate molding processes while maintaining precise dimensional control through the mold cavity design.
Solution Approach 2:
The blow-molding process is made multi-functional by enabling it to simultaneously form both the fuel tank container and the foam insulation. The single process performs multiple functions that would traditionally require separate operations, thereby increasing productivity without sacrificing precision.
3Ease of operation
If the fuel tank container is removed from the mold before insulation application, then ease of operation is improved, but manufacturing precision deteriorates due to potential movement
Solution Approach 1:
The patent combines the container formation and insulation application into a single uninterrupted process where the insulation is formed directly in the mold while the container is being formed. This eliminates the intermediate handling step that would require removing the container from the mold, thereby maintaining precise alignment and bonding without compromising operational simplicity.
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 method simplifies the production of insulated fuel tanks by integrating foam insulation directly with the fuel tank container, preventing movement and associated noise during operation.
Implementation Method 1
the plastic of the insulation fuses together with an outer layer of the plastic of the fuel tank container
Implementation Method 2
the foam encapsulation of the fuel tank container preferably is carried out in a cooling mold of the blow-molding process
Data Source
AI summary
A method is provided for producing a fuel tank of a motor vehicle, with an insulation applied to an outer side of a fuel tank container by application of foam, wherein the fuel tank container is placed into a foam-encapsulating mold and at least partially encapsulated in the foam insulation, the foam-encapsulating mold forming a first mold half and the fuel tank container forming a second mold half.