Separating Conveyor Unilateral Ejection for Varying Timber Dimensions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sawmills face limitations in processing tree trunks of varying diameters due to restricted adjustment ranges in separating conveyors, which hinder efficient separation of main yield and side cuttings.
Innovation Solution
The method involves a separating conveyor with a transport device that adjusts transversely to form unilateral ejection edges, allowing side boards to be separated in successive stages using gravity or additional force, eliminating the need for a second ejection edge and enabling wider adjustment ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If successive transport rollers are configured to be displaceable relative to one another in the transport direction to achieve width adjustment, then the transport device can adapt to main yield packs of different thickness, but the maximum adjustment width is restricted to three times the roller width
Solution Approach 1:
The separating conveyor is divided into multiple successive separating stages (first separating stage, second separating stage, etc.), each capable of unilateral ejection. This segmentation allows the system to handle packs of varying widths by processing ejection in stages rather than requiring a single large adjustment range, thereby resolving the contradiction between adaptability and device complexity.
Solution Approach 2:
The invention transitions from a single-dimension adjustment approach (rollers displacing in transport direction) to a multi-stage approach where each stage handles a portion of the ejection. By adding the dimension of sequential staging, the system achieves greater effective adjustment range without proportionally increasing the complexity of individual adjustment mechanisms.
2Productivity
If the retaining elements are opened on both sides simultaneously to separate side cuttings, then separation is achieved in one step, but geometric restrictions limit the maximum and minimum width of the main yield pack
Solution Approach 1:
The ejection process is segmented into successive unilateral ejection steps across multiple separating stages. Instead of opening retaining elements on both sides simultaneously, each stage opens retaining elements on one side only, allowing the system to adapt to various pack widths while maintaining efficient separation throughput.
Solution Approach 2:
The system dynamically adapts to different pack dimensions by adjusting which retaining elements are opened at each stage. The controlling device can selectively open retaining elements on different sides in different stages based on the specific geometry of the pack being processed, providing dynamic adaptability while maintaining productivity.
3Ease of manufacture
If the transport device width is fixed, then the device structure is simpler, but it cannot handle fluctuating trunk dimensions and varying positions of side cuttings
Solution Approach 1:
Rather than making the entire transport device width-adjustable (which would increase complexity), the invention segments the ejection function across multiple fixed-width stages. Each stage has a simpler fixed structure, but the combination of stages provides the necessary adaptability to handle varying trunk dimensions and side cutting positions.
Solution Approach 2:
The invention resolves the fixed-width limitation by adding the dimension of multiple successive stages rather than increasing the adjustment capability of a single stage. This dimensional approach to problem-solving allows handling of variable dimensions while keeping individual device structures simple and easy to manufacture.
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
This approach increases the flexibility of the separation process, allowing for reliable handling of sawn timber packs with dimensions smaller than the transport device's width, and adapts to fluctuating trunk dimensions and positions, enhancing processing efficiency.
Implementation Method 1
one or more side boards are separated transversely to the longitudinal direction using gravitational force
Data Source
AI summary
In a method for separating a sawn timber pack obtained from one trunk into main yield and side cuttings using a separating conveyor, the sawn timber pack is conveyed in a longitudinal direction via an underside transport device of the separating conveyor. While the single- or multi-piece main yield is supported by the transport device, one or more side boards are separated transverse to the conveying direction using gravitational force and/or external forces, whereby lateral retaining elements are briefly opened for release. In order to be able to process trunks with as large a diameter range as possible, the side boards located on opposing sides of the sawn wood pack are separated in two successive separating stages, whereby the lateral retaining elements of the separating conveyor are opened on one side on a respective release side in the successive separating stages.