Polymer Grease Manufacturing via Shear-Mixing Cooling
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Solution Overview
Problem
Conventional methods for manufacturing polymer greases lack control over cooling rates and heat dissipation, leading to inconsistent grease quality, especially in large-scale production, and are prone to oxidation, contamination, and dust ingress due to direct contact with ambient air.
Innovation Solution
A process involving a shear-mixing device with temperature-controlled portions and surface features to mix and cool a homogeneous liquid composition of lubricating oil and thickening polymer, allowing for controlled temperature variations and shear stress to produce a lubricating grease composition with enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional quenching method is used to cool the grease composition, then cooling speed is fast, but grease quality consistency deteriorates due to uncontrolled cooling rates and heat dissipation
Solution Approach 1:
The invention changes the cooling parameters from uncontrolled rapid quenching to controlled cooling with specific temperature ranges (150-350°C input, gradual cooling through shear-mixing device). The temperature-controlled portions allow precise parameter adjustment to achieve consistent grease quality while maintaining efficient cooling rates.
Solution Approach 2:
The invention implements feedback control through temperature-controlled portions in the shear-mixing device that monitor and adjust cooling rates. This feedback mechanism ensures consistent grease quality by maintaining optimal cooling conditions throughout the manufacturing process, preventing the quality variations seen in conventional methods.
2Device complexity
If conventional quenching method is used, then manufacturing process is simple, but grease composition is prone to oxidation and contamination from ambient air contact
Solution Approach 1:
The invention creates a controlled environment within the shear-mixing device that protects the grease composition from ambient air contact during cooling. The closed system with temperature-controlled portions effectively creates an inert environment, preventing oxidation and contamination while maintaining process efficiency.
Solution Approach 2:
The invention introduces temperature-controlled portions as an intermediary between the hot grease composition and the ambient environment. This intermediary component controls the cooling process while isolating the composition from harmful ambient factors, preventing direct contact with air that causes oxidation and contamination.
3Device complexity
If conventional quenching method is used, then equipment requirement is minimal, but grease properties such as mechanical stability and stiffness become extremely sensitive and difficult to reproduce
Solution Approach 1:
The invention implements feedback control through temperature-controlled portions that continuously monitor and adjust cooling conditions. This feedback mechanism stabilizes the grease properties during manufacturing, making mechanical stability and stiffness reproducible across different production batches, unlike the highly sensitive conventional quenching method.
Solution Approach 2:
The invention changes the cooling parameters from uncontrolled rapid quenching to a controlled process with specific temperature ranges and cooling rates. The temperature-controlled portions enable precise parameter adjustment, transforming the extremely sensitive grease properties into reproducible characteristics suitable for large-scale production.
4Loss of time
If rapid cooling is applied to form grease, then production time is reduced, but grease quality becomes inconsistent especially in large-scale production
Solution Approach 1:
The invention optimizes cooling parameters by implementing temperature-controlled portions that maintain optimal cooling rates throughout the process. This controlled approach achieves consistent grease quality in large-scale production without excessive production time, balancing speed and quality through precise parameter management.
Solution Approach 2:
The invention performs preliminary cooling control through temperature-controlled portions before the final grease formation. This preliminary action ensures that the grease composition reaches optimal conditions for consistent quality, preventing the need for rework or adjustment that would extend production time.
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 ensures consistent grease quality, reduces oxidation and contamination, and allows for the production of greases with tailored properties, enabling continuous extrusion and improved reproducibility in large-scale production.
Implementation Method 1
flowing the liquid composition through a shear-mixing device to mix and cool the liquid composition
Implementation Method 2
one or more temperature-controlled portions to each heat and/or cool the liquid composition
Implementation Method 3
one or more temperature-controlled portions to each heat and/or cool the liquid composition
Implementation Method 4
surface features in the flow path of the liquid composition which are surface textures that act as baffles for the flow of the liquid composition, causing shear-mixing
Data Source
Figure 1A~1D
Figure 2
Figure 3
AI summary
A process for the manufacture of a lubricating grease composition, the process comprising the steps of: providing an essentially homogeneous liquid composition comprising a lubricating oil and a thickening polymer; flowing the liquid composition through a shear-mixing device to mix and cool the liquid composition to form a lubricating grease composition.