Hydrogel Micronizing Stages for Fine Particle Control
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Solution Overview
Problem
Existing micronizing processes for super absorbent polymer hydrogel generate fine particles, leading to degraded product properties and increased process load, which can be minimized by controlling the rotation speed of cutters to reduce aggregation and fine particle generation.
Innovation Solution
A micronizing apparatus with a first cutter rotating at a speed proportional to transfer speed and a second cutter rotating at a speed proportional to collision number, along with a pre-cutter to minimize hydrogel particle loss and reduce fine particle generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional cutting and grinding processes are used to micronize super absorbent polymer, then particle size is reduced, but fine particles are generated leading to degraded product properties
Solution Approach 1:
The cutting process is divided into multiple sequential stages with different cutters having progressively smaller blade spacing. The first cutter performs rough cutting, the second cutter performs intermediate cutting, and the third cutter performs fine cutting. This segmented approach allows gradual size reduction without generating excessive fine particles that would occur with single-stage intensive cutting.
Solution Approach 2:
The apparatus uses multiple cutters rotating at different speeds optimized for their respective cutting stages. Each cutter's rotation speed is dynamically adjusted to match its cutting function, with the first cutter rotating slower for rough cutting and subsequent cutters rotating faster for finer cutting. This dynamic speed variation optimizes cutting efficiency while controlling fine particle generation.
2Productivity
If intensive cutting and grinding are applied to reduce particle size, then productivity increases, but process load increases and product properties deteriorate
Solution Approach 1:
The intensive cutting task is segmented across three separate cutters, each handling a portion of the size reduction. This distributes the energy load and mechanical stress across multiple components rather than concentrating it in a single cutter, reducing overall process load while maintaining productivity through continuous multi-stage processing.
Solution Approach 2:
The first and second cutters act as intermediaries that perform preliminary cutting before the third cutter performs the final fine cutting. This intermediary processing reduces the burden on the final cutter and distributes the energy consumption across multiple stages, optimizing overall process efficiency while controlling fine particle generation.
3Device complexity
If single-stage cutting is used, then device complexity is low, but fine particle generation increases and product quality decreases
Solution Approach 1:
The cutting apparatus is segmented into three distinct cutting stages with separate cutters, each optimized for its specific cutting function. This segmentation enables precise control over particle size at each stage, with the first cutter creating initial fragments, the second cutter reducing size further, and the third cutter achieving the final uniform particle size distribution required for high product quality.
Data Source
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AI summary
Disclose is a micronizing apparatus for hydrogel of super absorbent polymer. The micronizing apparatus for hydrogel of super absorbent polymer may comprise a body including a hopper formed at one side and a transfer space formed inside; a first rotation shaft rotatably disposed in the transfer space; a pre-cutter fixed to the body, through which transferred hydrogel passes; a first cutter rotatably disposed at the other side of the pre-cutter so as to rotate together with the first rotation shaft and cut hydrogel; a first hole plate fixed to the body, through which hydrogel cut in the first cutter passes; a second rotation shaft disposed co-axially with the first rotation shaft so as to be rotatable independently from the first rotation shaft; a second cutter rotatably disposed at the other side of the first hole plate so as to rotate together with the second rotation shaft and cut hydrogel having passed through the first hole plate; and a second hole plate fixed to the body, through which hydrogel cut in the second cutter passes.