Floor Sanding Machine Composite Support for Uniform Pressure
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Solution Overview
Problem
Existing floor sanding machines with composite supports exhibit non-homogeneous sanding action and generate strong vibrations, leading to reduced sanding precision and comfort, particularly in areas near walls or vertical surfaces.
Innovation Solution
A composite support for floor sanding machines with a hollow, elastically deformable layer and a rigid body, where one component has an inward-curved face, distributing pressure uniformly across the abrasive element from center to edge, ensuring consistent material removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a composite support with rigid body and flexible layer is used, then the sanding action becomes non-homogeneous with reduced precision, but the structure provides support and flexibility
Solution Approach 1:
The flexible layer is designed with non-uniform thickness, being thicker at the center and thinner at the edges. This local variation in thickness creates corresponding variations in elastic deformation under load, thereby distributing pressure more uniformly across the abrasive element from center to edge, which resolves the non-homogeneous sanding action problem
Solution Approach 2:
The lower face of the flexible layer is designed with an inward curvature forming a hollow or cavity. This curved geometry allows the flexible layer to deform differently under compression, with greater deformation at the edges compared to the center, thereby equalizing the contact pressure distribution across the abrasive element surface
2Productivity
If the flexible abrasive element is pressed against the floor surface, then sanding action is generated, but strong vibrations are produced reducing comfort and precision
Solution Approach 1:
The flexible layer with its specific thickness variation and hollow cavity structure acts as a built-in cushioning element. It absorbs and dampens vibrations generated during sanding before they can be transmitted to the operator and the floor surface, thereby reducing harmful vibrations while maintaining effective sanding action
Solution Approach 2:
The flexible layer's material properties and geometric parameters (thickness variation, hollow cavity) are optimized to change the vibration characteristics. The specific configuration modifies the elastic deformation behavior under compression, thereby reducing vibration amplitude and frequency while maintaining the necessary sanding pressure
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 achieves uniform sanding across the entire treated surface by varying pressure distribution, reducing vibrations and enhancing sanding precision and operator comfort.
Implementation Method 1
a further rigid body (1) overlaid said flexible layer (3), wherein said lower face of said rigid body (1) is in contact with an upper face of said flexible layer (3)... at least said flexible layer (3) has a thickness which varies homogeneously from the centre towards the outer edge
Data Source
Figure 1~2
Figure 3a
Figure 3b
AI summary
The present invention relates to a support (10) for a flexible abrasive element (5) to be applied to a sander, said support being generally circular in shape and comprising at least a flexible layer (3) made of elastically deformable material, adapted to join with the flexible abrasive element (5), at a lower face (3b) and a rigid body (1), being placed overlying the flexible layer (3) so that a lower face (1b) of said rigid body (1) is in contact with an upper face (3a) of said flexible layer (3), wherein said flexible layer (lb, 3a) have complementary shapes, wherein at least said flexible layer (3) or said rigid body (1) have an inward-curved face (1b, 3b), forming a downward-facing cavity, and wherein at least said flexible layer (3) has a thickness that varies homogeneously from the centre towards the outer edge.