Extrusion Granulating Hole with Compression Zone for Excreta Material
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Solution Overview
Problem
Existing excreta treating materials face challenges in achieving rapid disintegration and aggregation of absorbent granules without increasing manufacturing costs or degrading absorbing properties, as current methods involve coating layers or adding oils, which can lead to peeling issues, high costs, and fire risks during drying.
Innovation Solution
A granular excreta treating material is produced using an extrusion type compressive granulating apparatus with a granulating hole structure featuring a compression zone and a non-compression zone, where the raw material is compressed in the first zone and swells in the second, allowing for cutting into granules by a rotating cutting blade, eliminating the need for coating layers or added oils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coating layer is applied onto the outer peripheral surface of absorbent granules to enable disintegration and aggregation, then the granules can be aggregated after absorbing urine, but the manufacturing cost increases and the coating layer may peel off
Solution Approach 1:
The invention extracts and removes the coating layer from the granule structure, replacing it with an internal compression mechanism. The granules are compressed during manufacturing to create internal stress that causes them to disintegrate and aggregate naturally without requiring external coating materials, thereby eliminating the peeling problem and reducing manufacturing costs.
Solution Approach 2:
Instead of adding a coating layer on the outside to achieve aggregation, the invention inverts the approach by compressing the granules internally during manufacturing. This internal compression creates the desired aggregation behavior from the inside out, reversing the conventional outside-in approach and eliminating the need for costly coating materials.
2Reliability
If oil or similar substances are added to the raw material to improve disintegration and aggregation, then the organic fibers can be separated when absorbing urine, but the absorbing property is degraded and fire risk increases during drying
Solution Approach 1:
The invention converts the harmful effect of internal compression into a beneficial feature. By compressing the granules during manufacturing, internal stress is created that normally would be considered a defect, but this compression actually enables the granules to disintegrate properly when absorbing urine, converting what could be seen as a harmful compression into a beneficial disintegration mechanism without requiring flammable oils.
Solution Approach 2:
The invention replaces expensive and hazardous oil additives with a simple mechanical compression process during manufacturing. This disposable compression state is built into the granule structure itself, eliminating the need for continuous addition of costly and fire-prone oil substances while achieving the same disintegration effect.
3Reliability
If a coating layer is applied to form a double structure granule, then aggregation can be achieved, but the manufacturing process becomes more complex
Solution Approach 1:
The invention merges the coating application step with the granule formation step into a single manufacturing process. By compressing the granules internally during formation rather than applying a separate coating layer afterward, the manufacturing process is simplified while still achieving the desired aggregation behavior, combining multiple functions into one operation.
Solution Approach 2:
The invention segments the granule manufacturing process into two distinct zones within the granulating hole: a compression zone for densifying the granule and a non-compression zone for maintaining porosity. This segmentation allows the granule to achieve both structural integrity and aggregation capability without requiring a separate coating step, simplifying the overall manufacturing process.
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
This method enhances the absorbing property, disintegrability, and aggregativeness of the granules while reducing manufacturing costs and avoiding potential fire hazards, resulting in a cost-effective, high-performing excreta treating material.
Implementation Method 1
the raw material is compressed at the compression zone
Implementation Method 2
swells at the non-compression zone
Data Source
AI summary
A method of producing granular excreta treating material utilizes an extrusion type compressive granulating apparatus configured to produce granular excreta treating material that has an absorbing property and is formed by extruding and granulating a raw material via a granulating hole of the apparatus. The granulating hole includes a small diameter hole and a large diameter hole which are continuous to each other in the axial direction of the hole, in which the small diameter hole forms a compression zone, and the large diameter hole forms a non-compression zone, and in which the raw material is compressed at the compression zone, swells at the non-compression zone, and is cut into granules by a cutting blade rotating along an outlet surface of the non-compression zone.