Regeneration Device for Foundry Sand
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Solution Overview
Problem
Used foundry sand, contaminated with additives, poses significant environmental and disposal challenges due to its inability to be reused without processing, leading to high transportation and disposal costs.
Innovation Solution
A regeneration device with a cylindrical container and rotating friction elements, allowing for efficient mechanical processing and regeneration of used foundry sand, achieving high degrees of regeneration (above 95%) through controlled temperature and revolution settings, with features like double bearings for stability and easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If batch operation is used to process foundry sand, then the degree of regeneration is improved (above 95%), but the processing time and productivity are reduced compared to continuous processing
Solution Approach 1:
The patent employs batch operation where the container is periodically filled with used sand, processed for a specific time interval, and then emptied. This periodic batch processing allows the sand to be thoroughly heated and regenerated to above 95% quality while maintaining manageable processing times through optimized cycle durations.
2Object-affected harmful factors
If the container is designed with tight seals to prevent dust emission, then environmental protection is improved, but the complexity of the device increases due to additional sealing components
Solution Approach 1:
The patent extracts the dust removal function from the containment structure by providing separate dust extraction openings (first and second openings) that are distinct from the sealing system. This allows the container to maintain simpler seals while dust is actively removed through dedicated extraction paths connected to dust removal devices.
3Reliability
If the shaft is supported by double bearings spaced apart, then the stability and reliability of the shaft are improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent incorporates two bearings spaced apart along the shaft from the outset to prevent instability and excessive wear. This preliminary structural arrangement ensures the shaft remains stable during rotation and friction element operation, avoiding the need for complex correction mechanisms or frequent maintenance adjustments.
4Device complexity
If the friction elements are arranged on a single shaft to simplify the structure, then the device complexity is reduced, but the uniformity of sand processing and regeneration quality deteriorates
Solution Approach 1:
The patent segments the friction elements along the shaft at different positions to ensure comprehensive contact with the sand throughout the container. This segmentation allows multiple friction elements on a single shaft to process different zones of sand uniformly, maintaining regeneration quality without requiring multiple shafts.
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 device enables nearly complete regeneration of used foundry sand, reducing environmental impact and disposal costs by achieving high-quality regenerated sand with minimal loss of quality over repeated processing, facilitated by automation and efficient dust removal.
Implementation Method 1
the friction elements arranged on the shaft perform circular movements and transfer part of the mechanical energy to the sand to be regenerated. Depending on the number of revolutions of the shaft and the duration, the sand is heated and kept in suspension in the container.
Data Source
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AI summary
A regeneration device designed for the processing of foundry waste sands, comprising a cylindrical container with a lid and a bottom, wherein the container has a first opening and/or a second opening and several rotating friction elements formed in the container are provided, the friction elements being arranged on a first shaft, and a first bearing formed on the first shaft is provided, and the first shaft has a second bearing spaced apart from the first bearing, and the friction elements being arranged between the first bearing and the second bearing, and the container having a first flange on the top and a second flange on the bottom, wherein the first flange is positively connected to the lid and the second flange is positively connected to the bottom.