Manual Roll Gap Adjuster with Ratchet and Integrated Display
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Solution Overview
Problem
Existing roll stand gap adjustment mechanisms are complex, unreliable, and costly, requiring separate tools and power sources, and lack precision in setting and verifying gap dimensions, leading to suboptimal sheet product quality and significant scrap rates.
Innovation Solution
A roll stand with a manually operated adjusting mechanism featuring a ratchet mechanism and a hand-graspable actuator that allows incremental movement of roll end supports to vary gap dimensions between rolls, integrated with a gap dimension measuring assembly for precise control and display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If motorized mechanical devices and/or servohydraulic mechanisms are used to reposition rolls to set the gap, then the gap adjustment speed and precision are improved, but the device complexity and cost increase significantly
Solution Approach 1:
The adjusting mechanism is self-contained and self-sustaining, requiring no external power source or additional tools. The operator manually operates the mechanism using a hand-graspable actuator, and the system maintains the adjusted gap position without requiring external power supplies or complex control systems.
Solution Approach 2:
The patent extracts the essential function of gap adjustment from complex motorized systems and implements it through a simplified manual mechanism. The core functionality is isolated and achieved through basic mechanical components (screw threads, ratchet, pawl) that can be operated manually without external power or complexity.
2Manufacturing precision
If separate actuators are required to be moved to each adjusting mechanism, then the gap adjustment capability is maintained, but the ease of operation deteriorates due to tool handling and repositioning
Solution Approach 1:
The actuator is permanently integrated with the adjusting mechanism, eliminating the need for separate tools. The hand-graspable actuator is built into the mechanism itself, allowing the operator to adjust gaps at multiple locations without handling and repositioning separate tools between locations.
3Device complexity
If conventional wrench adjustment mechanisms are used, then the device complexity is reduced, but the ease of operation worsens due to requiring separate tools and extended bars for leverage
Solution Approach 1:
The actuator is permanently integrated with the adjusting mechanism, eliminating the need for separate tools. The hand-graspable actuator is built into the mechanism itself, allowing the operator to adjust gaps at multiple locations without handling and repositioning separate tools between locations.
4Manufacturing precision
If separate measuring instruments are used to verify gap dimensions, then the manufacturing precision can be checked, but the ease of operation and productivity deteriorate due to additional steps and potential scrap
Solution Approach 1:
The gap dimension display is integrated into the adjusting mechanism itself, providing self-verification without requiring separate measuring instruments. The system displays the gap dimension directly during adjustment, eliminating the need for additional measurement steps and reducing the risk of scrap due to incorrect gap settings.
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 reliable, cost-effective, and accurate method for adjusting roll gaps, ensuring consistent sheet product quality by allowing precise control and measurement of gap dimensions without the need for separate tools or power sources, reducing scrap rates and operational complexity.
Implementation Method 1
The first actuator is movable in a predetermined manner in first and second opposite directions. With the first actuator in the first state the ratchet mechanism operates to cause the first actuator to move the first element to reposition the one end support to increase the dimension of the first gap as the first actuator is moved in the first direction
Implementation Method 2
The first element is movable to cause repositioning of one of the end supports on the first roll and a first actuator for causing movement of the first element
Implementation Method 3
There is a threaded support with a first set of threads on one of the end supports on the second roll and the first element has a second set of threads. As the first element is turned around the operating axis the first element shifts relative to the threaded support along the operating axis
Data Source
AI summary
A roll stand for use in the extrusion forming of a sheet product from a flowable material having a main frame supporting first and second rolls between which there is a first gap through which at least one sheet layer passes during sheet product formation. A first adjusting mechanism moves the first roll relative to the second roll so as to vary a dimension of the first gap. The first adjusting mechanism has a first element that is moved by a first actuator that is: a) maintained on the apparatus; b) engageable by a hand of an operator; and c) manually movable through an operator's hand to thereby cause repositioning of the first roll.