Glass Roll Manufacturing Friction Support
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Solution Overview
Problem
The challenge is to impart a sufficient tensile force to a glass film during the rolling process without affecting the accuracy of its formation, as existing methods like nip rolls or suction rolls can damage the brittle material or lead to weaving due to inadequate contact and bending.
Innovation Solution
A method involving a horizontal conveyance section that supports the glass film in surface contact, using a support section with a coefficient of static friction of 1.0 or more, to apply a rolling force equal to or less than the static friction generated by the glass film's self-weight, preventing movement and ensuring secure rolling without nipping or bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If nip rolls are used to impart tensile force to the glass film during rolling, then the glass film can be delivered to the rolling device, but the glass film may be damaged due to pressing force from the nip rolls
Solution Approach 1:
A support section acts as an intermediary between the glass film and the rolling device. The support section has a high coefficient of static friction (1.0 or more) that enables it to grip the glass film through friction alone, eliminating the need for mechanical nip rolls that apply pressing force. The support section moves the glass film in surface contact without causing surface damage.
Solution Approach 2:
The patent replaces the traditional mechanical nip roll system with a friction-based support section system. Instead of using mechanical pressing force from rotating rolls, the system uses friction force generated by the support section's high coefficient of static friction to impart tensile force and move the glass film, thereby avoiding mechanical damage.
2Force
If suction rolls are used to impart tensile force to the glass film, then the glass film can be delivered, but the glass film must be bent which increases the risk of breaking
Solution Approach 1:
The support section serves as a mediator that transfers tensile force to the glass film through friction in surface contact, eliminating the need for bending the glass film as required by suction rolls. The support section's high friction coefficient enables force transmission without mechanical deformation.
Solution Approach 2:
The patent substitutes the suction roll system (which requires bending the glass film to create negative pressure contact) with a friction-based support section system. The support section imparts tensile force through friction in surface contact, avoiding the bending action that would compromise the brittle glass film's strength.
3Stability of the object's composition
If a high rolling force is applied to the glass film during rolling, then the glass film can be securely rolled without weaving, but the accuracy of glass film formation is adversely affected
Solution Approach 1:
The patent changes the friction parameter by using a support section with a coefficient of static friction of 1.0 or more. This high friction coefficient enables the support section to impart sufficient tensile force to the glass film through friction alone, achieving secure rolling stability without applying excessive rolling force that would compromise formation accuracy.
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
This approach allows for the stable and high-quality manufacture of glass rolls with a low risk of weaving during transportation, maintaining the accuracy of the glass film's formation and preventing surface damage.
Implementation Method 1
a rolling force equal to or less than a static friction force, which is generated by a self-weight of the glass film between the glass film and the support section
Data Source
AI summary
A manufacturing method for a glass roll includes drawing a glass film downward vertically from a forming device, converting a delivery direction of the glass film from a vertical direction to a horizontal direction, continuously delivering the glass film to a downstream side by a horizontal conveyance section, and rolling the glass film into a roll shape on a downstream side of the horizontal conveyance section. While the glass film is supported in surface contact by an endless belt serving as a support section, which is provided in the horizontal conveyance section, a rolling force equal to or less than a static friction force, which is generated by a self-weight of the glass film between the glass film and the endless belt, is imparted to the glass film.