Flared Column Plant Tray for Stabilized Media Stability
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Solution Overview
Problem
Existing plant propagation trays with tapered cells are prone to instability when holding cylindrical stabilised media, leading to uneven growth and irrigation issues due to excessive air flow and root bridging between cells.
Innovation Solution
A plant-growing tray with flared columns that are wider at the lower end than the upper end, featuring inclined cell walls and contact edges that support cylindrical stabilised media, reducing air flow and preventing root bridging by providing a stable and secure environment for plant growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If tapered cells are used to hold cylindrical stabilised media, then the tray structure is simple and easy to manufacture, but the stabilised media becomes unstable and tips over
Solution Approach 1:
The cell wall is segmented into multiple support surfaces arranged around the cylindrical stabilised media. These support surfaces are distributed at different positions (front, back, left, right) to provide balanced stabilization, preventing the media from tipping over while maintaining manufacturing simplicity.
Solution Approach 2:
The cell wall is designed with locally differentiated features: vertical portions for structural integrity and inclined support surfaces for stabilization. The support surfaces are positioned at specific locations around the cell to contact the stabilised media at optimal points, providing localized stability where needed while keeping other areas simple for manufacturing.
2Reliability
If more plastic is used in tray walls to prevent root bridging, then root bridging is reduced, but tray weight increases and air flow decreases
Solution Approach 1:
The cell wall is segmented into discrete support surfaces rather than continuous solid walls. The gaps between support surfaces allow air to flow through the cell walls, maintaining air pruning functionality while providing sufficient structural support to prevent root bridging between adjacent cells.
Solution Approach 2:
The cell wall structure is designed with inherent porosity through the arrangement of support surfaces with gaps between them. This allows air to pass through the walls for root pruning while the support surfaces provide mechanical barriers to prevent root bridging, eliminating the need for solid continuous walls.
3Productivity
If skeletal tray designs are used to maximise air flow, then air pruning is improved, but stabilised media becomes unstable
Solution Approach 1:
The cell wall combines vertical portions for structural support with inclined support surfaces for stabilization. The support surfaces are strategically positioned to contact the stabilised media, providing localized stability while maintaining gaps elsewhere in the structure to allow air flow for pruning.
4Ease of manufacture
If tapered cells are used, then manufacturing is simple, but irrigation management deteriorates due to excessive air flow
Solution Approach 1:
The cell wall is segmented into support surfaces with controlled gaps, creating a semi-permeable structure that allows regulated air flow. This segmentation provides sufficient support for irrigation management while maintaining manufacturing simplicity through the modular support surface design.
Data Source
AI summary
A plant-growing tray for containing cylindrical stabilised media for growing plants comprises an array of flared columns, a lower end of the columns being wider than an upper end. The columns define an array of cells therebetween for containing cylindrical stabilised media, and a column comprises one or more contact edges defined by an intersection between a wall of the flared column and a virtual cylindrical surface in a cell, such that the contact edges are suitable for contacting a cylindrical stabilised medium positioned in the cell.