Multi-Stage Separator for Polyurethane Foam and Fiber from ASR

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Solution Overview

Problem

Current methods for recycling Automobile Shredder Residue (ASR) are inefficient in separating valuable materials like polyurethane foam and fiber, leading to high discard rates and contamination, which hinders the achievement of the mandated 85% recycling ratio for scrapped vehicles.

Innovation Solution

A multi-stage apparatus with separators, including a rake-shaped fiber separator, grinders, and an airflow and mesh plate-type separator, is used to mechanically and selectively extract polyurethane foam and fiber from ASR, improving the recycling efficiency and purity of target materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If manual separation of polyurethane foam and fiber is used, then labor flexibility is maintained, but separation efficiency is low and time consumption is high

Engineering Contradiction:

Improveseparation efficiencyVSAvoidtime consumption

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent replaces manual mechanical separation with an automated optical detection and sorting system. Sensors detect polyurethane foam and fiber materials, and an automated sorting mechanism separates them, dramatically improving separation efficiency while reducing time consumption compared to manual methods

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system enables self-service separation where the apparatus automatically identifies and sorts polyurethane foam and fiber without human intervention. The automated detection and sorting mechanism performs the separation task independently, eliminating the need for manual labor while maintaining high efficiency

Inventive Principle:

Principle #25Self-service

2Adaptability or versatility

If typical separation apparatuses are used for metals and plastics, then those materials are recovered, but polyurethane foam and fiber cannot be selectively separated

Engineering Contradiction:

Improvematerial separation capabilityVSAvoidseparation purity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent creates a multi-functional separation apparatus that can handle multiple material types including metals, plastics, polyurethane foam, and fiber. The system uses different detection and separation mechanisms for different material types, enabling universal application while maintaining high separation purity for each specific material

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The separation process is segmented into multiple stages: metal separation, plastic separation, and dedicated polyurethane foam and fiber separation. Each stage uses specialized apparatus optimized for specific material types, ensuring high purity separation for each category while maintaining overall system versatility

Inventive Principle:

Principle #1Segmentation

3Productivity

If residues are simply buried or incinerated without separation, then processing costs are reduced, but recycling ratio cannot reach 85% mandate

Engineering Contradiction:

Improverecycling ratioVSAvoidseparation equipment complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent introduces automated detection sensors and control systems as intermediaries between the raw residues and the separation mechanisms. These intermediaries enable precise identification and routing of different materials, achieving high recycling ratios through coordinated automated separation processes

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system selectively recovers valuable materials (polyurethane foam and fiber) from the residue stream while directing unwanted materials to disposal. This selective recovery approach maximizes the recycling ratio by capturing all recoverable materials through the multi-stage separation process

Inventive Principle:

Principle #34Discarding and recovering

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 apparatus significantly increases the recovery rate of polyurethane foam and fiber, reducing waste processing costs and enhancing the overall recycling ratio of scrapped vehicles by efficiently separating and recycling these valuable materials.

Implementation Method 1

an airflow separator, and a mesh plate type separator

Methodology Applied

Scientific EffectAir flow separation: Density Gradient

Implementation Method 2

magnetic separation

Methodology Applied

Scientific EffectMagnetic separation: Magnetism

Data Source

PatentUS8985487B2Apparatus for selectively separating polyurethane foam and fiber from automobile shredder residue

Publication Date: 2015.03.24 HYUNDAI MOTOR CO LTD

AI summary

The present invention provides an apparatus for selectively separating polyurethane foam and fiber from Automobile Shredder Residue (ASR). The apparatus includes a first separator, a second separator, and a third separator. The first separator primarily separates fine particles, such as dirt or glass pieces, from the ASR at a front portion thereof and separates large-sized polyurethane foam and fiber from the ASR at a rear portion thereof. The second separator grinds remaining materials after the primary separation of the first separator. The third separator separates medium-sized polyurethane foam and fiber from the remaining materials after the separation of the first separator and secondarily separates plastics, rubber, and other materials.