Adjustable Foil Apparatus for Paper Making Machines
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Solution Overview
Problem
Existing foil devices for paper making machines lack sufficient adjustability to accommodate varying paper grades and processing speeds, requiring frequent blade replacements to maintain paper quality.
Innovation Solution
An adjustable foil apparatus with a forming element that can be moved vertically and accurately positioned relative to the forming fabric using a sliding mechanism with adjustment blocks and a yoke pin system, allowing for precise height adjustment and easy replacement of worn or damaged edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed foil device is used, then the structure is simple, but the adaptability to different paper grades and processing speeds is poor
Solution Approach 1:
The foil apparatus employs a dynamic adjustment mechanism that allows the forming element to be moved vertically relative to the forming fabric. The adjustment mechanism includes a movable carriage that can be positioned at different locations along the forming fabric width, and the forming element height can be adjusted independently at each carriage position. This dynamic configurability enables the same device to adapt to different paper grades and processing speeds without requiring structural simplification.
2Measurement precision
If the forming element is fixed in position, then the device structure is simple, but the positioning precision relative to the forming fabric is insufficient
Solution Approach 1:
The adjustment mechanism is segmented into multiple independent carriages that can be positioned at different locations along the forming fabric. Each carriage has independent height adjustment capability, allowing precise positioning of the forming element at specific locations. This segmentation enables high positioning precision without requiring a single complex adjustment system for the entire width.
Solution Approach 2:
The patent replaces traditional mechanical adjustment systems with a more precise positioning mechanism that uses a combination of mechanical guides and adjustable components. The carriage system moves along precision-guided rails on the forming fabric, providing accurate lateral positioning, while vertical adjustment is achieved through independent height mechanisms at each carriage station.
3Reliability
If foil blades are frequently replaced, then paper quality can be maintained, but productivity is reduced
Solution Approach 1:
The adjustable foil apparatus allows continuous modification of operating parameters (forming element height, carriage position) to compensate for wear or changing paper grade requirements. This eliminates the need for frequent blade replacements while maintaining paper quality consistency, as the same forming element can be repositioned and reconfigured for different production conditions.
Solution Approach 2:
The system enables parameter changes in the forming process by adjusting the vertical position of the forming element and the lateral position of carriages. These parameter modifications allow the apparatus to adapt to different paper grades and processing speeds, maintaining reliability without requiring physical replacement of the foil blade.
4Adaptability or versatility
If a vertically adjustable forming element is used, then adaptability improves, but the adjustment mechanism becomes complex
Solution Approach 1:
The vertical adjustment function is segmented into multiple independent adjustment stations along the forming fabric width. Each carriage station has its own height adjustment mechanism, allowing localized vertical positioning without affecting other sections. This segmentation simplifies each individual adjustment mechanism while providing comprehensive vertical adjustability across the entire apparatus.
Data Source
AI summary
An adjustable foil apparatus for use with a paper making machine includes an elongated upper assembly having a forming element positionable relative to a forming fabric of a paper making machine and an elongated base mountable to a paper making machine. The upper assembly being coupled to the base and movable relative thereto for adjusting an overall height of the foil apparatus, the forming element being configured for selective movement toward and away from the forming fabric of a paper making machine. The adjustable foil apparatus including an adjustment mechanism fixed to the base, the adjustment mechanism including a slide bar movable relative to the base along an axis of the base and configured to move the forming element relative to the base and toward and away from the forming fabric.