Brittle Plate Breaking Device with Regulating Portion

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Solution Overview

Problem

Existing methods for processing brittle plates, such as glass, face challenges in breaking them along a score line without causing chipping due to excessive stress, as the breaking position is supported by a template, leading to rapid increases in tensile and compressive stress.

Innovation Solution

A method and device that utilize a pressing member and a template with a flat portion and a regulating portion to bend and deform the brittle plate along a score line, where the score line is within the remaining portion, allowing for controlled tensile stress and minimizing chipping, with the regulating portion shaping the deformation to maintain a perpendicular break surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the score line is included within the portion of the brittle plate arranged flat against the template, then a broken and cut surface perpendicular to the plate surface can be obtained, but excessive stress is applied causing chipping of the brittle plate

Engineering Contradiction:

Improvebroken surface perpendicularityVSAvoidchipping

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The template is divided into two functional segments: a flat portion for supporting the plate and a regulating portion for controlling bending. This segmentation allows the score line to be positioned in the remaining portion rather than on the flat supported portion, enabling controlled stress distribution that prevents chipping while maintaining perpendicular break surfaces.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the template are given different properties: the flat portion provides uniform support, while the regulating portion provides controlled resistance to bending. This local differentiation allows the score line to be located in the remaining portion where stress is controlled, preventing chipping while achieving the desired break geometry.

Inventive Principle:

Principle #3Local quality

2Ease of manufacture

If the breaking position is supported by the template, then the plate can be broken along the score line, but tensile and compressive stress rapidly increase causing chipping

Engineering Contradiction:

Improvebreaking processVSAvoidtensile and compressive stress

Core Design Contradiction:

Ease of manufactureVSStress or pressure

Solution Approach 1:

The template's regulating portion dynamically responds to the pressing force by controlling the bending deformation. As the pressing member applies force, the regulating portion allows controlled movement that gradually increases stress rather than allowing rapid stress buildup, enabling the breaking process while preventing chipping.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The regulating portion acts as an intermediary between the pressing member and the brittle plate. It mediates the stress transmission by controlling the bending deformation, allowing the breaking process to occur while preventing excessive stress concentration that would cause chipping.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 method effectively reduces the stress applied during breaking, preventing chipping and ensuring a broken surface perpendicular to the plate surface, while allowing for efficient processing with reduced load and controlled crack extension.

Implementation Method 1

the pressing member is pressed against a predetermined position of a remaining portion of the brittle plate. The brittle plate is bent and deformed at an outer edge of a supporting surface of the template as a bending fulcrum

Methodology Applied

Scientific EffectBending deformation: Deformation

Implementation Method 2

a stress is generated. Such stress causes the score line to open so that the brittle plate can be broken along the score line

Methodology Applied

Scientific EffectStress generation: Mechanical Force

Implementation Method 3

a regulating portion that regulates a bending deformation shape of the brittle plate when the pressing member is pressed against a predetermined position of a remaining portion of the brittle plate

Methodology Applied

Scientific EffectStress control: Mechanical Force

Data Source

PatentUS9822029B2Method for processing brittle plate, and device for processing brittle plate

Publication Date: 2017.11.21 AGC INC

AI summary

A method for processing a brittle plate includes a breaking step in which a pressing member for pressing a surface of the brittle plate and a support member for supporting a back face of the brittle plate are used to bend and deform the brittle plate and break the brittle plate along a score line formed on the surface of the brittle plate. The support member includes a flat portion that is arranged flat against one portion of the brittle plate to support the brittle plate, and a regulating portion that regulates a bending deformation shape of the brittle plate when the pressing member is pressed against a predetermined position of a remaining portion of the brittle plate. The breaking step includes breaking the brittle plate along the score line that is within the remaining portion of the brittle plate.