Tapered Plasterboard Edge Structure for Breakage-Resistant Processing

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Solution Overview

Problem

Current methods for forming tapered sound damping plasterboards are prone to breakage during the abrasive removal of the liner due to unsupported tapered edges, leading to inconsistencies in the taper and potential loss of the tapered section.

Innovation Solution

The plasterboard design features a first surface with a raised section and a second surface that slopes towards the edge, supported by guide elements to maintain structural integrity during processing, reducing breakage and ensuring consistent taper formation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If tapered edges are formed on plasterboards to improve joint appearance and sound damping, then the aesthetic quality and sound absorption are improved, but the plasterboards become more prone to breakage during abrasive liner removal

Engineering Contradiction:
Improvejoint appearance qualityVSAvoidresistance to breakage during processing
Core Design Contradiction:
ReliabilityVSStrength

Solution Approach 1:

The tapered edge geometry is pre-formed on the plasterboard before the abrasive liner removal process. The taper is created by forming the edge at a specific angle (e.g., 45 degrees) relative to the front surface, so that during subsequent liner removal, the tapered geometry is already in place to guide the removal process and prevent breakage.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The tapered edge acts as an intermediary structure between the flat front surface and the back surface. This intermediate geometry provides a gradual transition that distributes mechanical stresses during abrasive removal, preventing sudden breaks while maintaining the final aesthetic appearance.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Strength

If the tapered edge section is made wider to improve structural support during processing, then breakage resistance is improved, but the precision of the taper formation and surface flatness deteriorate

Engineering Contradiction:
Improvestructural support during processingVSAvoidtaper consistency and surface flatness
Core Design Contradiction:
StrengthVSManufacturing precision

Solution Approach 1:

The tapered edge provides localized structural support precisely where needed during the abrasive removal process. The taper is concentrated at the edge region rather than uniformly distributed, providing enhanced support at the critical vulnerable areas while maintaining precision in the overall taper formation and surface flatness.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS12523037B2Tapered plasterboards and methods for making them
Publication Date: 2026.01.13 CERTAINTEED GYPSUM INC
  • US12523037B2 patent drawing
  • US12523037B2 patent drawing
  • US12523037B2 patent drawing

AI summary

Disclosed herein are plaster boards having a first surface and an opposing second surface, and a first edge and an opposing second edge that bound the first surface and the second surface. The first surface includes a first section and a second section, the first section being raised compared to the second section, the second section abutting the second edge. The second surface includes a first section and a second section that are separated by a boundary between the first edge and the second edge. The first section of the second surface is substantially parallel to the first section of the first surface. The second section of the second surface slopes toward the first surface from the boundary toward the second edge. Methods for making the plaster boards involve forming wet plaster material and drying the wet plaster material such that the wet plaster material hardens into a plasterboard.