Rail Foam Bar Applicator for Friction Material
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Solution Overview
Problem
Existing methods for applying friction modifying materials to railroad rails often result in wastage and uneven distribution, as the materials do not consistently reach the center of the rail and can drip or pour in unnecessary areas, affecting train performance and rail wear.
Innovation Solution
A rail applicator assembly featuring an elongate polymeric or rubber foam body with a flow passageway and an applicator support, where the foam body is secured to the rail and compresses under a passing wheel, ensuring consistent application of friction modifying materials to the rail's field surface, with an angled and widening flow passageway design that directs the material to the outer surface and closes during wheel contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If friction modifying material is applied to the top of the rail using conventional methods, then the material can contact train wheels, but the material does not consistently reach the center of the rail and is wasted by dripping or pouring to positions where it is not needed
Solution Approach 1:
The patent uses a foam body (flexible shell) that conforms to the rail surface geometry. The foam body is compressed by passing wheels to extrude friction modifying material precisely where needed on the rail surface, preventing waste from dripping or pouring to unnecessary areas while ensuring consistent application to the rail center.
Solution Approach 2:
The patent replaces conventional gravity-based or pressure-based application systems with a mechanically-actuated extrusion system. The foam body is designed to be compressed by the mechanical force of passing wheels, which automatically controls material extrusion timing and location, improving precision and reducing waste.
2Manufacturing precision
If an applicator device is used to apply friction modifying material, then material distribution can be improved, but the device complexity increases with multiple components such as dispenser housing, flow chamber, and distribution plate
Solution Approach 1:
The patent merges multiple functions into a single integrated foam body component. The foam body simultaneously serves as the applicator structure, material reservoir, distribution mechanism, and sealing element, eliminating the need for separate dispenser housing, flow chamber, and distribution plate components while achieving uniform material distribution.
Solution Approach 2:
The foam body incorporates localized features such as varying density regions, specific pore structures, and geometric variations to control material flow and distribution patterns. These local quality variations enable precise material distribution without requiring complex overall device structures.
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 targeted and efficient application of friction modifying materials to the rail's outer surface, reducing wastage and improving train performance by maintaining the material's position adjacent to the rail, even with varying wheel dimensions, and allowing the foam body to return to its original form after compression.
Implementation Method 1
The elongate polymeric or rubber foam body compresses when contacted by a passing rail wheel and then returns to its original form.
Implementation Method 2
The elongate polymeric or rubber foam body compresses when contacted by a passing rail wheel and then returns to its original form.
Data Source
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AI summary
A rail applicator assembly includes a rail having a head portion, a base portion, and a web portion extending between the head portion and the base portion. The head portion defines an outer surface. An applicator for applying a friction modifying material to the surface of the rail includes a foam body and an applicator support. The foam body is secured to the applicator support and defines a flow passageway that extends through the foam body for friction modifying material to flow through.