Cylindrical Brush Structure for Uniform Water Flow and Low Slippage
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Solution Overview
Problem
Existing cylindrical brushes used for cleaning electronic components, particularly silicon wafers, contain toxic materials like polyvinyl formalin (PVA) and face issues with slippage, non-uniform water flow, and inefficiencies in particle removal, leading to potential damage and contamination.
Innovation Solution
A cylindrical brush design featuring a core member, rail plates, PVA nodule foam bars, and end caps, manufactured through a precise molding process that minimizes PVA usage, ensures mechanical unity with the core, and allows for uniform and targeted water flow, reducing toxic material presence and improving cleaning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional cylindrical brushes use PVA solution to form cured PVA bristles, then the brush provides cleaning function, but the brush contains toxic materials and releases particles
Solution Approach 1:
The patent changes the physical and chemical parameters of the PVA material by controlling the curing process and formulation to reduce toxic byproducts while maintaining cleaning effectiveness. The PVA solution is cured to form foam bars with controlled porosity and structure that minimize particle release.
Solution Approach 2:
The brush uses a composite structure combining PVA foam bars with a solid core member and rail plates. This composite design allows the PVA to provide cleaning function while the structural components contain the material and prevent excessive particle release.
2Strength
If the brush uses a solid core structure, then the brush provides mechanical strength, but slippage occurs between the brush and core
Solution Approach 1:
The patent uses porous PVA foam bars that are inserted into the solid core structure. The porous nature of the foam allows mechanical interlocking with the core, preventing slippage while maintaining the structural strength provided by the solid core.
Solution Approach 2:
The combination of solid core member with porous PVA foam bars creates a composite structure where the two materials work together - the solid core provides overall strength while the foam bars provide friction and interlocking to prevent slippage.
3Productivity
If water flows through the brush body, then the brush distributes cleaning solution, but water loss occurs and cleaning efficiency decreases
Solution Approach 1:
The patent segments the water flow path by providing dedicated flow channels separate from the brush body. Water is directed through specific channels to the cleaning surface rather than permeating the entire brush structure, preventing water loss while maintaining efficient distribution.
Solution Approach 2:
The rail plates and core member act as intermediaries that guide and control water flow. Instead of water flowing directly through the brush body, these structural components mediate the flow path to achieve targeted delivery without loss.
4Reliability
If the brush uses uniform PVA distribution, then the brush provides consistent cleaning, but manufacturing complexity increases
Solution Approach 1:
The patent uses pre-formed PVA foam bars with uniform structure that are then inserted into the brush assembly. The uniformity is achieved during the foam bar manufacturing process rather than during brush assembly, simplifying the overall manufacturing while maintaining consistent cleaning performance.
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 new brush design reduces toxic material content by 90%, enhances cleaning efficiency with uniform water flow, minimizes slippage, and decreases particle release, resulting in improved cleaning performance and reduced environmental impact.
Implementation Method 1
PVA is the key polymeric component in a solution that when poured into a mold and heated, forms a tough sponge-like material called polyvinyl formalin, or otherwise known as cured PVA
Data Source
AI summary
A method for manufacturing a cylindrical brush of a cleaning tool, comprises a cylindrical brush having a core member, a plurality of rail plates, a plurality of polyvinyl alcohol (PVA) nodule foam bars and a pair of end caps. The core member includes an outer wall having a plurality of core holes and a pair of openings. The plurality of rail plates having a plurality of rail holes arranged along the outer wall of the core member. The plurality of polyvinyl alcohol (PVA) nodule foam bars is installed at each of the plurality of rail plates such that each of a plurality of nodules of the PVA nodule foam bar aligns with the plurality of core holes and with the plurality of rail holes. The pair of end caps encloses the pair of openings of the core member.