Thermoplastic Core Panel Bead Forming for Commercial Vehicles
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Solution Overview
Problem
The production of panels with matrix elements in commercial vehicles is complex and cost-intensive, particularly those with thermoplastic core layers, which are used for thermal insulation.
Innovation Solution
Heating the matrix element in sections and thermally forming it to create beads with reduced thickness, allowing it to fit precisely between inner and outer cover layers without complex shaping, and bonding it to these layers for a simple and cost-effective assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a core layer with matrix elements made of thermoplastic is used for thermal insulation, then thermal insulation performance is improved, but production complexity and cost increase
Solution Approach 1:
The patent applies parameter changes by heating the thermoplastic matrix element to its melting temperature range (80-200°C, preferably 100-150°C) to enable thermal forming. This temperature parameter change allows the material to transition from rigid to formable state, enabling complex shaping through simple contact with forming tools, thus improving thermal insulation while reducing production complexity
Solution Approach 2:
The patent utilizes phase transitions of the thermoplastic material by heating it to melt and then cooling it to solidify. During heating, the thermoplastic transitions from solid to molten state, allowing it to conform to the forming tool's shape. After forming, cooling solidifies the material into the desired bead shape with reduced thickness, achieving both thermal insulation performance and simplified production
Solution Approach 3:
The patent applies preliminary action by pre-heating the matrix element before forming operations. The heating unit预先 heats the thermoplastic material to its forming temperature range, so that when the forming unit applies pressure, the material is already in a formable state. This preliminary heating action eliminates the need for complex multi-step forming processes, reducing overall production complexity while maintaining thermal insulation properties
2Manufacturing precision
If the matrix element is thermally formed to create beads with reduced thickness, then fit precision between cover layers is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the matrix element into distinct regions: original thickness regions and bead regions with reduced thickness. The thermal forming process creates discrete beads at specific locations where cover layer connection is needed, while leaving other regions unchanged. This segmented approach achieves precise fit for bonding while keeping the manufacturing process simple through localized rather than global modification
Solution Approach 2:
The patent replaces complex mechanical cutting or machining systems with a thermal forming system. Instead of using mechanical tools to remove material and create precise beads, the invention uses thermal energy to temporarily soften the thermoplastic, allowing it to be shaped by simple contact pressure from forming tools. This substitution of mechanical removal with thermal shaping reduces manufacturing process complexity while achieving the required fit precision
Solution Approach 3:
The patent utilizes parameter changes in temperature and pressure to achieve precise bead formation. By controlling the heating temperature within the thermoplastic's melting range and applying specific forming pressures, the process creates beads with exact thickness reductions needed for optimal cover layer fit. These controlled parameter changes enable precise manufacturing without complex tooling or multiple processing steps
3Ease of manufacture
If section heating and thermal forming is applied to matrix elements, then production cost is reduced, but energy consumption increases
Solution Approach 1:
The patent applies partial action by heating only the specific sections of the matrix element that require forming, rather than heating the entire component uniformly. The heating unit is positioned to target only the regions where beads need to be created, and the heating continues only until the thermoplastic reaches its forming temperature in those localized areas. This partial heating approach reduces overall energy consumption while enabling cost-effective production through simplified forming processes
Solution Approach 2:
The patent utilizes periodic action in the heating and forming process. The heating unit activates only during the forming operation to bring the thermoplastic to its melting point, then deactivates during cooling and ejection phases. This periodic cycling of heating, forming, cooling, and ejection creates an efficient production rhythm that minimizes energy consumption while maintaining cost-effective manufacturing through rapid cycle times
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
Facilitates easier and more economical production of panels with improved thermal insulation and structural integrity by reducing material thickness in specific areas to enhance fit and bonding efficiency.
Implementation Method 1
the at least one matrix element is heated at least in sections
Implementation Method 2
the heated section of the at least one matrix element is thermally formed with at least one forming tool, by means of the thermal forming at least one bead with a specifically reduced thickness of the matrix element is formed in sections in the at least one matrix element
Implementation Method 3
the at least one thermally formed matrix element is connected to the inner structure-providing cover layer and the outer structure-providing cover layer
Data Source
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AI summary
Described and illustrated is a method for producing a panel (10) of a commercial vehicle (1), in particular a truck, trailer or semi-trailer, comprising an inner structural cover layer (11), an outer structural cover layer (12) and a core layer (13) provided between the inner cover layer (11) and the outer cover layer (12), wherein the core layer (13) has at least one matrix element (18) made of a thermoplastic material.In order to enable the panels and commercial vehicles to be manufactured more easily and cost-effectively, it is provided that the at least one matrix element (18) is heated at least in sections, that the heated section of the at least one matrix element (18) is thermally formed using at least one forming tool (21), that by means of the thermal forming at least one bead (24) with a specifically reduced thickness (DS) of the matrix element (18) is formed in sections in the at least one matrix element (18), and that the at least one thermally formed matrix element (18) is connected to the inner structure-providing cover layer (11) and the outer structure-providing cover layer (12).