Creping Simulation Sled for Tissue Chemical Testing
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Solution Overview
Problem
Current methods for testing creping chemicals in tissue paper production lack representation of real process conditions, particularly in terms of speed and environmental simulation, which hinders the evaluation of new chemical combinations and their optimal conditions.
Innovation Solution
A simulation arrangement and method involving a sled with a heated test surface, spray unit, creping blade, and measurement means to replicate the creping process, allowing for high-speed testing of chemicals and creping blade interactions, closely approximating industrial conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional test apparatuses are used for testing creping chemicals, then the testing can be performed outside production apparatus, but the test environment does not represent real process conditions and test speeds are much lower than industrial speeds
Solution Approach 1:
The patent creates a scaled-down copy of the industrial creping process by reproducing the essential components (Yankee cylinder, creping blade, tissue sheet) in a laboratory setting. This allows testing to be performed outside production apparatus while maintaining representative process conditions, resolving the contradiction between ease of testing and reliability of test conditions.
2Device complexity
If traditional test apparatuses are used, then the setup is simpler, but the test speeds are much lower than real industrial process speeds
Solution Approach 1:
The patent introduces a movable sled that can travel along a linear path at controlled speeds, allowing the test apparatus to dynamically adjust its operating speed. This enables the system to achieve higher test speeds that better represent industrial conditions while maintaining a relatively simple apparatus configuration.
3Reliability
If real production apparatus is used for testing, then the test conditions are representative, but the creping process becomes a bottleneck that decreases machine speed and efficiency
Solution Approach 1:
The patent extracts the essential testing function from the full production apparatus by creating a dedicated test rig that replicates only the necessary creping components. This allows chemical testing to be performed on a separate, smaller-scale system, preventing the creping process from becoming a bottleneck in production while maintaining accurate evaluation conditions.
4Speed
If a sled with linear path travel is used, then high test speeds can be achieved that correspond to industrial speeds, but the device complexity increases
Solution Approach 1:
The patent segments the test system into distinct functional modules: a sled for linear motion, a separate spray unit for chemical application, a creping blade assembly, and measurement instruments. This modular segmentation allows each component to be optimized independently for its specific function, enabling high test speeds while managing overall device complexity through organized modularity.
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 effectively simulates the creping process, enabling reliable testing of chemicals and creping blade forces at industrial speeds, allowing for the evaluation of different chemical compositions and creping blade parameters, thereby improving the efficiency and accuracy of chemical testing.
Implementation Method 1
heating means for heating the test surface
Implementation Method 2
a spray unit with at least one spray nozzle, the spray unit arranged along the linear path of the sled, and the at least one spray nozzle arranged to spray a chemical on the test surface
Implementation Method 3
measurement means for measuring data related to force between the creping blade and the test surface
Data Source
AI summary
Embodiments of the present disclosure relate to arrangements for simulating creping of tissue and methods for simulating creping of tissue.