Convex Edge-Machining Tool for Cleaner Wood Panel Bonding

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Solution Overview

Problem

Existing technologies face challenges in reliably removing protruding chips and particles from the edge surfaces of wood-based material plates, leading to poor adhesion of edge profiles and potential moisture penetration.

Innovation Solution

A tool with a convex work area, designed to be symmetrically shaped around the tool axis, is used to process the edge surfaces of wood-based material plates. This tool effectively removes protruding particles by creating a concave shape on the edge surface, improving the surface quality and preventing particle entry into the glue pot.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional tool with a flat or non-convex working area is used to process the edge surface, then the device complexity is low, but the protruding chips and particles cannot be reliably removed, leading to poor adhesion of edge profiles

Engineering Contradiction:
Improvereliability of chip removalVSAvoidtool geometry complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The working area of the tool is designed with a convex curvature in the radial direction, creating a spherical or arc-shaped contact surface. This curvature allows the tool to effectively engage with and remove protruding chips and particles from the edge surface of the wood-based panel, resolving the technical contradiction by providing reliable chip removal through geometric design rather than complex mechanical systems

Inventive Principle:
Principle #14Spheroidality (Curvature)

2Manufacturing precision

If multiple processing steps (chip removal, sanding, smoothing) are applied to the edge surface, then the surface quality improves, but the processing time and device complexity increase

Engineering Contradiction:
Improveedge surface qualityVSAvoidprocessing time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The tool combines multiple functions into a single processing element: the convex working area simultaneously performs chip removal, surface smoothing, and preparation for glue application in one operational step. This merging of functions achieves high edge surface quality without requiring separate processing steps, thereby reducing processing time and operational complexity

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The convex working area is designed to perform preliminary preparation of the edge surface by removing protruding chips and creating a uniformly smooth surface before glue application. This preliminary action ensures optimal adhesion conditions are established in advance, eliminating the need for additional intermediate processing steps

Inventive Principle:
Principle #10Preliminary action

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 convex tool design ensures efficient removal of protruding particles, resulting in improved adhesion of edge profiles, reduced risk of moisture penetration, and enhanced overall quality of the wood-based material plates.

Implementation Method 1

The working area, which can be designed in particular in the form of a tangential surface of the tool relative to the tool axis, has a working relief that includes elevations and depressions oriented relative to the tool axis. The working relief can be roughened, in particular, in the manner of sandpaper, with the working relief in the working area having a large number of tiny elevations and depressions that form the roughness.

Methodology Applied
Scientific EffectAbrasion: Abrasion

Data Source

PatentEP4241948B1Aggregate for machining an edge surface of a wood-based panel and method for machining the same
Publication Date: 2025.05.14 MUNDKEMULLER BODO
  • EP4241948B1 patent drawingFigure 1
  • EP4241948B1 patent drawingFigure 2
  • EP4241948B1 patent drawingFigure 3

AI summary

The present application relates to an assembly (1) for processing an edge surface (2) of a wood-based panel (3) prior to the application of adhesive, comprising a tool (5) rotatably driven about a tool axis (4), wherein the tool (5) has a working area (10) rotating in an annular manner around the tool axis (4), the working area (10) having a working relief by means of which the tool (5) can engage with the edge surface (2) during intended use. In order to provide a device by means of which the preparation of a respective edge surface of a wood-based panel prior to the application of adhesive for the attachment of an edge profile is improved, it is proposed according to the invention that the working area (10) – viewed in a cross-section of the tool (5) including the tool axis (4) of the tool (5) – is convexly shaped.