Multi-Level Switchback Conveyor for Board Singulation
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Solution Overview
Problem
Current conveyor systems in the wood processing industry face challenges in efficiently singulating and aligning elongated products, particularly low-quality boards with varying cross-section profiles, leading to increased manpower costs, reduced processing speed, and the exclusion of usable materials due to inefficiencies in existing unscrambler machines and singulation methods.
Innovation Solution
A multi-level switchback conveyor system that utilizes a series of adjacent, angled planar surfaces to guide products off conveyors, allowing gravity to accelerate and reorient them into a single layer, reducing the need for manual intervention and automated control systems, while maintaining high processing speed and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional unscrambler machines with flights are used to singulate product, then alignment is improved, but processing speed is reduced due to stop/start cycling and product groups are not dispersed
Solution Approach 1:
The conveyor system is divided into multiple independent conveyors (first conveyor, second conveyor, third conveyor) that operate simultaneously at full speed. Each conveyor handles a portion of the product flow, eliminating the need to stop and start the entire system to achieve singulation and alignment.
Solution Approach 2:
The invention introduces a vertical dimension by using a elevated second conveyor that receives product from the first conveyor and deposits it onto the third conveyor at a different elevation. This multi-level arrangement allows gravity to assist in separating product groups while maintaining continuous horizontal movement, resolving the conflict between alignment and processing speed.
2Adaptability or versatility
If deeper flights are used in unscramblers to support low-quality boards with wane, then singulation capability is improved, but product is presented in groups of two or three pieces rather than singulated
Solution Approach 1:
The system segments the conveying function across three separate conveyors, each with optimized characteristics. The first conveyor accepts varied product, the elevated second conveyor provides a transition zone where gravity begins to separate groups, and the third conveyor delivers singulated product. This segmentation allows deep flight support for low-quality boards while achieving accurate singulation through the multi-stage process.
Solution Approach 2:
By moving product vertically from the first conveyor to the second conveyor and then to the third conveyor, the system utilizes gravity in the vertical dimension to separate product groups. This vertical movement allows deeper flights to support boards with wane while still achieving singulation through the gravity-assisted separation during the vertical transition.
3Manufacturing precision
If manual intervention is used to monitor and correct board presentation, then alignment quality is improved, but manpower costs increase and processing speed is limited
Solution Approach 1:
The system uses gravity and the natural movement of product under its own weight to achieve singulation and alignment without manual intervention. The elevated second conveyor allows product to fall under gravity onto the third conveyor, automatically separating groups and aligning individual pieces. This self-service mechanism maintains high processing speed while ensuring consistent presentation quality.
4Reliability
If multiple workers are assigned to conveyors to ensure proper product presentation, then reliability is improved, but operational costs increase
Solution Approach 1:
The multi-level conveyor system uses gravity and mechanical design to automatically ensure reliable product presentation without requiring multiple workers. The elevated second conveyor creates a gravity-assisted separation zone that reliably singulates and aligns product as it transitions to the third conveyor, maintaining operational efficiency while ensuring consistent presentation quality.
Solution Approach 2:
By introducing vertical movement through the elevated second conveyor, the system achieves reliable product presentation through gravity-assisted separation rather than requiring multiple workers for manual correction. The vertical dimension provides a natural separation mechanism that reliably singulates product while maintaining high operational efficiency.
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 system effectively singulates and aligns elongated products with reduced floor space requirements, increased processing speed, and lower operational costs, enabling the efficient handling of low-quality boards without the need for complex control systems or additional manpower.
Implementation Method 1
allowing gravity to accelerate and reorient them into a single layer
Data Source
AI summary
A method and apparatus wherein a flow of elongated product, such as wooden boards, oriented transverse to the direction of travel; having abutted stacks or piles with numerous layers in a variously misaligned fashion, is received onto the first and uppermost of a series of generally horizontal conveyors arranged in a single vertical array one above the other with each subsequent level operating in a direction opposite of the level above it. The flow of product is transferred off the end of each conveyor into and through a gap between the conveyor and a declined reversal ramp system wherein gravity acts with the product's momentum to move it across and past a series of adjacent, planar surfaces angled relative to one another in the general direction of product travel such that the product is aligned more perpendicular to its travel, dispersed more into a single layer, and reversed in its direction of travel with each successive transition to the next lower conveyor resulting in a singulated, aligned array of pieces flowing onto the last and lower-most conveyor from which they are presented to a subsequent process or machine.