Foam-Filled Metal Cornhole Board for Lightweight Durability

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Solution Overview

Problem

Traditional wooden cornhole game boards are heavy, expensive, prone to wear and tear, and not weatherproof, posing challenges in handling, storage, and maintenance.

Innovation Solution

A lightweight cornhole game board constructed with galvanized steel skins and injected polyurethane foam, featuring foldable legs, a carrying handle, and a durable, weather-resistant design that allows for easy customization with vinyl or magnetic graphics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If traditional wooden boards are used, then the board provides a nice finished appearance and smooth surface, but the board becomes heavy and expensive

Engineering Contradiction:

Improvesurface finishVSAvoidboard weight

Core Design Contradiction:

ShapeVSWeight of moving object

Solution Approach 1:

The board combines galvanized steel skins with polyurethane foam core to create a composite structure that is both lightweight and provides a smooth playing surface, eliminating the need for heavy solid wood while maintaining the desired surface characteristics for bag sliding

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The galvanized steel skins are formed into thin pan-like structures with folded edges that create a hollow box configuration, providing a smooth outer surface for gameplay while minimizing material usage and overall weight

Inventive Principle:

Principle #30Flexible shells and thin films

2Reliability

If traditional wooden boards are used, then the board provides durability, but the board becomes prone to wear and tear and not weatherproof

Engineering Contradiction:

ImprovedurabilityVSAvoidweather resistance

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The material composition is changed from organic wood to inorganic galvanized steel and synthetic polyurethane foam, fundamentally altering the board's properties to be impervious to moisture, rot, and weather-related degradation while maintaining structural durability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The galvanized steel skins provide a protective outer layer that resists corrosion and weathering, creating a maintenance-free surface that does not deteriorate like wood, effectively making the board immune to environmental damage

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Strength

If traditional wooden boards are used, then the board provides structural strength, but the board becomes heavy and difficult to transport

Engineering Contradiction:

Improvestructural strengthVSAvoidtransportability

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

The board is segmented into a hollow box structure with separate upper and lower steel skins and an injected foam core, replacing solid wood construction with a lightweight cellular structure that maintains strength through geometric configuration rather than material mass

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The galvanized steel skins are formed into deep folded pans that create a hollow box structure, providing structural rigidity and strength through the folded geometry and hollow configuration rather than through thick solid material, thereby reducing weight while maintaining strength

Inventive Principle:

Principle #16Partial or excessive action

4Ease of operation

If traditional wooden boards are used, then the board provides a smooth surface for gameplay, but the board requires maintenance and is not cost-effective

Engineering Contradiction:

Improvesmooth surface for gameplayVSAvoidmaintenance and cost

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The galvanized steel skins provide a durable, low-maintenance surface that does not require staining, sealing, or protective treatments like wood, eliminating ongoing maintenance costs and effort while providing a consistently smooth playing surface

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The combination of galvanized steel and polyurethane foam creates a cost-effective composite structure that is simpler to manufacture than ornate wooden boards, requiring no finishing processes and minimal assembly, thereby reducing both manufacturing and maintenance costs

Inventive Principle:

Principle #40Composite materials

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 provides a durable, lightweight, and cost-effective game board that requires minimal maintenance, reduces environmental impact, and facilitates easy transportation and customization, while maintaining smooth gameplay.

Implementation Method 1

Expanding polyurethane foam is injected into the hollow box where it is cured and forms a hard, strong, rigid board encapsulated in steel

Methodology Applied

Scientific EffectExpanding polyurethane foam: Phase Change

Data Source

PatentUS20260021362A1Cornhole game board

Publication Date: 2026.01.22 A&J MANUFACTURING LLC

AI summary

A light-weight metal cornhole game board formed from a hollow metal substantially flat box with a closable foam port and a 6-inch cornhole bag hole bordered and peripherally sealed by a section of pipe or injection molded plastic sleeve within the box. A closed-cell, expanding cured foam is injected into the hollow metal box through the closeable foam port. Folding long legs and short legs are pivotally fastened to a bottom side of the metal box which fold up flush with the box.