Lightweight Screen Assembly for Vibrating Machines
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Solution Overview
Problem
Conventional vibrating screening systems face issues with increased weight leading to reduced g-force efficiency, increased wear due to oscillations, and labor-intensive, costly fabrication with non-recyclable screen assemblies.
Innovation Solution
A screen assembly design featuring a lightweight, stiff screen chassis with a metal screen attached, utilizing a grid structure and removable screens for optimized performance and recyclability, formed through molding and sheet metal punching processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional metal screen modules are used, then structural rigidity is maintained, but weight increases reducing g-force efficiency
Solution Approach 1:
The screen assembly combines aluminum extrusions (metal) with polyurethane panels (polymer) to create a composite structure. The aluminum frame provides structural rigidity and strength, while the polyurethane panels provide screening functionality with reduced weight compared to all-metal constructions. This composite approach resolves the contradiction by achieving both lightness and structural integrity.
Solution Approach 2:
The patent uses thin polyurethane panels as the screening surface instead of heavy metal meshes or perforated plates. These thin film panels achieve the screening function while dramatically reducing weight. The panels are tensioned within the aluminum frame to maintain structural stability, thus resolving the weight-strength contradiction.
2Productivity
If screen assembly weight is reduced, then g-force efficiency improves, but structural integrity may compromise
Solution Approach 1:
The aluminum-polyurethane composite structure achieves optimal balance between weight and strength. The aluminum extrusions provide the necessary structural framework to withstand vibrational forces and maintain integrity, while the lightweight polyurethane panels enable high g-force efficiency. This composite design resolves the contradiction by distributing structural requirements across different materials with complementary properties.
Solution Approach 2:
The screen assembly is segmented into distinct functional components: the aluminum extrusion frame handles structural loads and vibration resistance, while the polyurethane panels handle material screening. This segmentation allows each component to be optimized for its specific function, achieving both structural integrity and high g-force efficiency simultaneously.
3Strength
If welded frames are used for screen assemblies, then structural strength is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent replaces traditional welding processes with mechanical assembly methods. Aluminum extrusions are joined using mechanical fasteners, connectors, or interlocking mechanisms rather than thermal welding. This substitution eliminates complex welding operations, reduces manufacturing steps, and simplifies production while maintaining frame strength through properly engineered mechanical joints.
Solution Approach 2:
The aluminum extrusions are designed as universal structural components that can be assembled into different screen assembly configurations using standardized mechanical connectors. This modular approach allows the same basic extrusion profile to serve multiple structural functions across different applications, simplifying manufacturing inventory and assembly processes while maintaining structural integrity.
4Reliability
If conventional screen assemblies are used, then screening function is provided, but recyclability is limited
Solution Approach 1:
The screen assembly is segmented into separable components: the aluminum frame, polyurethane panels, and fastening systems. This segmentation enables selective replacement and recycling - worn polyurethane panels can be removed and replaced while the durable aluminum frame is retained and reused. This modular segmentation significantly improves recyclability and sustainability compared to conventional integrated screen assemblies.
Solution Approach 2:
The design enables easy recovery and reuse of the aluminum frame structure while allowing disposal or replacement of consumable polyurethane panels. The aluminum extrusions can be recovered, cleaned, and reused for multiple screen assemblies, reducing waste and improving the environmental sustainability of the screening system while maintaining reliable screening function.
Data Source
AI summary
According to one aspect there is provided a screen assembly for a vibrating screening machine. The screen assembly comprises a screen chassis and a screen for screening material such as a solution containing liquid and solids. The screen chassis comprises a first face and a second face opposite to the first face, the screen chassis defining a plurality of openings therethrough from the first face to the second face for allowing passage of a material that has been screened. The screen is attached to the first face of the screen chassis and covering the openings of the screen chassis at the first face. The screen chassis may be made of a light-weight, stiff material. The screen may be made of a durable material such as metal. A method for making a screen assembly is also provided.