Reciprocating Wire Grid Embedment Device for Cementitious Panels
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Solution Overview
Problem
In the production of cementitious panels, there is a challenge in achieving uniform distribution of fibers within the slurry, leading to inconsistent bonding and reduced panel strength due to premature setting of the slurry, which causes production line downtime and increases costs.
Innovation Solution
A device featuring a wire grid or honeycomb structure is used to embed fibers into the slurry, employing a reciprocating motion to ensure thorough mixing and prevent premature setting, thereby maintaining line efficiency and enhancing panel strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If fibers are applied in a mat or web upon the slurry, then fiber reinforcement is achieved, but non-uniform distribution of fibers occurs leading to inconsistent bonding and reduced panel strength
Solution Approach 1:
The fiber mat is segmented into individual fibers through a chopping mechanism that cuts the continuous mat into discrete fiber segments. This segmentation allows the fibers to distribute more uniformly throughout the slurry rather than remaining as a consolidated mat, thereby improving both uniformity of distribution and bonding consistency while maintaining reinforcement strength.
2Productivity
If the slurry sets prematurely, then production line downtime increases and costs increase, but the reciprocating motion device adds complexity to the production line
Solution Approach 1:
The embedment device employs a reciprocating motion that periodically moves the fiber mat into and out of the slurry. This periodic action prevents the slurry from setting prematurely by continuously disrupting its setting process, while the rhythmic nature of the motion allows for efficient integration into the production line despite the added mechanical complexity.
3Reliability
If the wire grid or honeycomb structure is used for embedment, then uniform fiber distribution and bonding are achieved, but the device complexity increases
Solution Approach 1:
The embedment device utilizes a wire grid or honeycomb structure with porous openings that allow slurry to penetrate through while retaining and distributing fibers uniformly. The porous structure provides a large surface area for fiber-matrix interaction, ensuring consistent bonding, while the geometric pattern of the grid or honeycomb simplifies the overall device design compared to more complex mechanical mixing systems.
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 effectively embeds fibers uniformly into the slurry, reducing premature setting and downtime, and achieves comparable or superior flexural strength to industry-standard methods, ensuring consistent panel quality and reduced production costs.
Implementation Method 1
the wire grid member or the honeycomb or grid cell structure is moved vertically up and down into the fiber and slurry layer in a reciprocating motion to a specific depth in the slurry to press the fiber and slurry together
Implementation Method 2
The reciprocating motion of the grid structures create a 'kneading' or 'massaging' action in the slurry, which embeds previously deposited fibers into the slurry
Implementation Method 3
the close, intermeshed and thin walled structure of the wire grid or thin walled grid cell structure prevents the buildup of slurry on the grid, and in effect creates a 'self-cleaning' action
Data Source
AI summary
An embedment device for use in a cementitious panel production line such as a structural cementitious panel (SCP) production line wherein hydraulic cement slurry is transported on a moving web on a support frame, and chopped fibers are deposited upon the slurry. The device includes as one embodiment, a wire grid structure mounted on a reciprocating shaft driven by a piston which moves the grid down into the slurry and then up out of the slurry transverse of the travel of the slurry layer on the web. An alternative embodiment device includes a grid cell structure with thin walls extending upward from the grid surface in contact with the slurry that is moved up and down in a reciprocating motion transverse of the travel of the slurry layer on the web. The intermeshing relationship of the grid cell with the fiber and slurry enhances embedment of the fibers into the slurry and also prevents clogging of the device by fibers and prematurely set slurry particles.