Screed Assembly Compression Bolt Heating Element
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional heating systems for screed plates in asphalt paving machines often result in uneven heating, increased complexity, high maintenance costs, and unsafe working conditions due to direct flame heating, and require complex pressurized thermal fluid systems or electrical heating with non-uniform contact issues.
Innovation Solution
A compression bolt assembly with a primary bolt, compression bolt, spring, jam nut, end nut, and bolt foot is used to securely attach a heating element to the screed plate, providing consistent and uniform heat through a compression force applied by the spring, which is easy to operate and maintain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If direct flame heating systems are used to heat screed plates, then heating capability is improved, but heating uniformity deteriorates and safety conditions worsen
Solution Approach 1:
The patent introduces a compression spring as an intermediary element between the heating element and the screed plate. This spring-mediated connection allows for uniform pressure distribution across the heating element surface, ensuring even heat transfer to the screed plate while eliminating the need for direct flame contact that causes localized overheating and safety issues.
2Manufacturing precision
If pressurized thermal fluid systems are used to heat screed plates, then heating uniformity is improved, but system complexity increases
Solution Approach 1:
The patent extracts and eliminates the complex pressurized thermal fluid circulation system by replacing it with a simpler direct contact heating element. The heating element, secured by compression springs, provides uniform heating through direct thermal contact without requiring pumps, reservoirs, or pressurized fluid circuits, thereby maintaining heating uniformity while dramatically reducing system complexity.
3Ease of manufacture
If electrical heating elements are used with poor contact, then installation simplicity is improved, but heating uniformity deteriorates
Solution Approach 1:
The patent employs compression springs that provide dynamic, self-adjusting pressure to maintain optimal contact between the heating element and the screed plate. As the screed plate flexes or moves during operation, the springs automatically adjust to maintain consistent pressure and thermal contact, ensuring uniform heating without requiring complex installation procedures or rigid fixed connections.
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
The solution ensures uniform heating across all parts of the screed plate, reduces maintenance complexity, and provides a safer working environment by eliminating the need for direct flame heating and high-pressure thermal fluid systems, while maintaining efficient heat distribution.
Implementation Method 1
The compression spring is adapted to be placed over the lower end of the primary bolt, and the compression bolt assembly is adapted to cooperate with the upper screed plate to apply a compression force to the heating element on the lower screed plate
Implementation Method 2
a heating element that is in contact with the lower screed plate... provides consistent uniform heat to all portions of the screed plate(s)
Data Source
AI summary
A screed assembly for an asphalt paving machine includes a lower screed plate, an upper screed plate and a heating element that is in contact with the lower screed plate. The screed assembly also includes a compression bolt assembly having a primary bolt, a compression bolt and a compression spring. The primary bolt has a through hole, and the compression bolt is adapted to be inserted through the hole of the primary bolt. The compression spring is adapted to be placed over the lower end of the primary bolt, so that the compression bolt assembly may cooperate with the upper screed plate to apply a compression force to the heating element on the lower screed plate.