Molded Polyurethane Vibratory Screen Grid Reinforcement
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Solution Overview
Problem
Molded polyurethane screens have traditionally had large dividing strips between openings, resulting in low open area percentages and inefficient performance.
Innovation Solution
The development of a vibratory screen with a molded polyurethane body featuring bi-directional reinforcement members and a grid structure that reduces the size of support members, increasing the open screening area and structural strength, while preventing deformation during vibratory loading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If large dividing strips are used between openings, then structural strength is improved, but open area percentage decreases
Solution Approach 1:
The screen body is segmented into multiple members (first members extending between side edges, second members extending between lower and upper edges) that form a grid structure. This segmentation allows each member to be optimized for strength while collectively providing sufficient structural support, enabling thinner members that increase open area percentage.
Solution Approach 2:
The screen utilizes molded polyurethane material with integrated reinforcement members embedded within the screen body. This composite structure provides enhanced structural strength without increasing the size of dividing strips, thereby maintaining high open area percentage while preventing deformation during operation.
2Stability of the object's composition
If larger support members are used, then structural stability is improved, but screen opening size decreases
Solution Approach 1:
The reinforcement members are embedded within the thickness dimension of the screen body rather than increasing the planar size of support members. This dimensional approach provides structural stability through internal reinforcement without reducing the screen opening dimensions in the primary screening plane.
3Area of stationary object
If screen thickness is reduced to increase open area, then open area percentage increases, but resistance to deformation decreases
Solution Approach 1:
The screen employs molded polyurethane with embedded reinforcement members creating a composite structure. This allows the screen body to be made thinner for increased open area while the reinforcement members provide the necessary resistance to deformation and hourglassing during vibratory operation.
Solution Approach 2:
The screen is divided into multiple thin members (first and second members) that are supported by the reinforcement structure. This segmentation allows each member to be thin for high open area while the collective grid structure with reinforcement provides overall structural integrity and deformation resistance.
Data Source
Figure 1~2
Figure 1A
Figure 1B
AI summary
A molded polyurethane vibratory screen including a body having opposite side edge portions (14,16), upper and lower edge portions (18,20), an upper surface and a lower surface, first members (101) extending between the side edge portions and second members (102) extending between the lower edge portion and the uppe kiedge portion, third members (203) substantially parallel and extending transversely between the side edge portions and having multiple first members therebetween, fourth members (204) substantially parallel and extending transversely between the lower edge portion and the upper edge portion and having multiple second members therebetween, reinforcement members (50) molded integrally with the first (101) or second (102) members, and reinforcement rods (1050) molded integrally with the fourth members (204).