Laminate-Coated Stair Step with Post-Formed Edge
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Solution Overview
Problem
Existing stair steps, particularly those made of solid wood, face challenges in achieving high load-bearing capacity, flexural rigidity, and durability while maintaining economic production and alternatives to traditional 40 mm thick solid wood steps.
Innovation Solution
A laminate-coated step with a post-formed top edge, featuring a multi-layer structure including highly compressed wood material or chipboard, HDF, or MDF boards, with a laminate coating providing UV resistance, abrasion resistance, and slip resistance, and a rounded edge for enhanced safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If solid wood steps with thickness of 40 mm are used, then high load-bearing capacity and flexural rigidity are achieved, but the production cost increases and alternative materials are limited
Solution Approach 1:
The patent applies composite materials by combining a wood-based step core with HPL laminate coating and edge bands. This multi-material construction achieves the structural strength of solid wood while using more economical materials and allowing for alternative wood-based composite cores, thus resolving the contradiction between load-bearing capacity and production cost.
Solution Approach 2:
The patent changes the thickness parameter from the traditional 40 mm solid wood to a optimized multi-layer construction with total thickness of 3-6 mm for cover layers. This parameter optimization maintains structural integrity while reducing material consumption and production cost.
2Reliability
If laminate coating is applied to the step, then UV resistance, abrasion resistance, and slip resistance are improved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-forming the rounded edges on the step core before applying the laminate coating. This ensures that the laminate follows the desired contour from the beginning, avoiding the need for complex post-forming operations and reducing manufacturing complexity while maintaining durability.
Solution Approach 2:
The patent uses thin film laminate coating (HPL) that can be applied to conform to the step shape. This thin film approach provides the required durability and protection without adding significant structural complexity, as the laminate serves multiple functions (protection, decoration, edge definition) in a single layer.
3Ease of manufacture
If the step core is made of highly compressed particle board, then economic production is achieved, but the load-bearing capacity and flexural rigidity may be reduced
Solution Approach 1:
The patent uses composite materials construction where the wood-based particle board core is reinforced with laminate coating and edge bands. This composite structure compensates for the lower inherent strength of particle board by adding protective and structural layers, achieving both economic production and adequate load-bearing capacity.
Solution Approach 2:
The patent applies local quality by using different materials in different locations: economical particle board for the core where structural support is needed, and durable laminate coating for the surfaces where wear and UV resistance are critical. This localized material selection optimizes both cost and performance.
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 solution ensures high load-bearing capacity, flexural rigidity, and extended service life with improved safety features, while being economically viable and resistant to swelling and shrinkage, offering a reliable alternative to traditional solid wood steps.
Implementation Method 1
a laminate coating made of high-pressure laminate (HPL) on the front side of the front cover layer or Continuous Pressure Laminate (CPL) is applied
Implementation Method 2
the advantages of the laminate coating of the steps such as UV light resistance, abrasion resistance, slip resistance and slip resistance are retained
Implementation Method 3
slip resistance
Implementation Method 4
the upper and lower cover plate layer and the front cover face layer are designed as, in particular, highly compressed wood material boards
Implementation Method 5
the necessary technical properties are achieved with the special multi-layer structure
Implementation Method 6
the upper outer edge of the front cover layer is designed as a post-formed rounded edge with a rounding radius
Implementation Method 7
A front cover layer, also known as a gluing unit, is attached to the front face of the step core
Data Source
Figure 1~2
AI summary
A tread (10) for a staircase comprising a load-bearing tread core (20), a top surface (12) forming a tread, a bottom surface (14), a front face (16), and a back face (18), characterized in that the load-bearing tread core (20) is made of solid wood material, an upper cover layer (22) is attached to the tread core (20) on the top surface (12), a lower cover layer (24) is attached to the tread core (20) on the bottom surface (14), a front cover layer (26) / gluing unit is attached to the tread core (20) on the front face (16), the upper outer edge of the front cover layer (26) is formed as a post-formed rounded edge with a radius of curvature (R), and the upper and lower cover layers (22, 24) and the front cover layer (26) are made of shrinkage- and swelling-free material.at least on the upper cover plate layer (22) and on the front end face of the front cover plate layer (26) a laminate coating made of high-pressure laminate (HPL) or continuous-pressed laminate (CPL) is applied.