Sieve With Wide Through-Flow Channels For High Capacity Screening
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Solution Overview
Problem
Existing sieves in plan sifters lack the ability to efficiently adjust to varying product flows, particularly at high performance levels, and do not facilitate optimal air circulation and product handling.
Innovation Solution
A sieve box with significantly wider through-flow channels (approximately 13 cm) and a modular outlet structure, combined with a foamed PU construction and stainless steel insert screen frames, allowing for enhanced air circulation and high-capacity screening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional narrow through-flow channels are used in sieve boxes, then the structural integrity and standardization are maintained, but the screening capacity and air circulation performance are limited
Solution Approach 1:
The patent applies parameter changes by significantly increasing the width of through-flow channels from conventional narrow dimensions to at least 1.5 times the usual width (approximately 13 cm). This parameter modification enables higher screening capacity (up to 40 t/h) and improved air circulation while maintaining structural integrity through the foamed PU construction and modular design.
2Ease of manufacture
If the sieve box is made from foamed plastic without metal reinforcement, then the weight is reduced and cleaning is simplified, but the structural strength and rigidity may be compromised
Solution Approach 1:
The patent employs composite materials by combining foamed PU (polyurethane) for the main sieve box structure with stainless steel insert screen frames. The foamed plastic provides lightweight construction and simplified cleaning, while the metal insert frames supply the necessary structural strength and rigidity. This composite approach resolves the contradiction between ease of manufacture and structural strength.
3Productivity
If wide through-flow channels are implemented, then air circulation and product flow handling are improved, but the manufacturing complexity and sealing requirements increase
Solution Approach 1:
The patent applies segmentation by dividing the sieve box into modular components with insert screen frames that can be independently manufactured and assembled. The wide through-flow channels are integrated into this modular structure, allowing for simplified sealing at the joints between modules. This segmentation reduces overall sealing complexity while maintaining the benefits of wide channels for air circulation and product flow.
Data Source
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AI summary
The invention relates to a sieve, in particular a sieve for use in plansifters or similar sieving and screening devices for screening mealy or granular products. To increase the screening performance, there is provided at least one drop-through channel (6) whose width is at least 1.5 times that of conventional sieves.