Delivery Roller Surface Hardness Wear Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Textile machine delivery rollers experience significant wear on their outer peripheral surfaces due to friction with fiber bundles, leading to reduced performance and increased maintenance needs.
Innovation Solution
A delivery roller with a rubber composite roller body having a Type A durometer hardness between 40 and 83, and a property modified layer on its outer surface with enhanced microhardness, formed by coating with a surface modifying agent such as an isocyanate-group compound, to increase wear resistance and reduce static friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the outer peripheral surface of the delivery roller is made harder to increase wear resistance, then wear resistance is improved, but gripping strength deteriorates
Solution Approach 1:
The invention applies different hardness properties to different parts of the roller: the outer peripheral surface is made harder (microhardness greater than the roller body by 1 to 15) to resist wear, while the roller body maintains lower hardness to provide adequate gripping strength. This local differentiation of material properties resolves the contradiction between wear resistance and grip strength.
Solution Approach 2:
The delivery roller is constructed as a composite structure with a rubber composite roller body and a property modified layer on the outer peripheral surface. The property modified layer has different microhardness characteristics than the base roller body, creating a composite material system that simultaneously achieves wear resistance at the surface and adequate grip strength in the bulk material.
2Reliability
If the microhardness of the outer peripheral surface is increased by modifying the rubber composite, then wear resistance is improved, but the roller body hardness becomes excessive
Solution Approach 1:
The invention precisely controls the location and extent of hardness modification: only the outer peripheral surface is modified to have greater microhardness, while the roller body maintains its original hardness characteristics. The microhardness of the property modified layer is greater than that of the roller body by a controlled amount (1 to 15), preventing excessive overall hardness while achieving surface wear resistance.
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
The solution effectively suppresses wear and damage to the roller's surface, maintaining gripping strength while enhancing the hardness of the outer peripheral surface, thereby improving the durability and performance of the delivery roller in textile machines.
Implementation Method 1
a property modified layer formed on an outer peripheral surface of the roller body. The property modified layer is formed by modifying the rubber composite forming the roller body
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A front top roller (65b) is a delivery roller arranged in a drafting device (6) to deliver a sliver (S). The front top roller (65b) includes a roller body (92) and a property modified layer (94) formed on an outer peripheral surface of the roller body (92). The roller body (92) is made of a rubber composite of a type A durometer hardness in the range from 40 to 83. The property modified layer (94) is formed by modifying the rubber composite used for making the roller body (92) such that a microhardness of the property modified layer (94) is greater than that of the roller body (92) by a value in the range from 1 to 15.