Conveyor Belt With Uneven Surface Resin Layer
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Solution Overview
Problem
Conveyor belts with high coefficients of friction for inclined conveyance compromise on strength due to decreased hardness of the elastic layer, leading to insufficient belt strength and reliability in conveying objects.
Innovation Solution
A conveyor belt comprising a stretchable knitted fabric with an elastic layer made of a first thermoplastic material and a surface resin layer of a second thermoplastic material with lower hardness, featuring unevenness on the conveying surface, which maintains sufficient tensile strength and coefficient of static friction for reliable inclined conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coefficient of friction of the conveying surface is increased to reliably convey objects in inclined conveyance, then the conveying reliability is improved, but the hardness of the elastic layer decreases leading to a decrease in belt strength
Solution Approach 1:
The conveyor belt is divided into two distinct layers: an elastic layer for providing strength and stretchability, and a surface resin layer for providing high friction. This segmentation allows each layer to independently fulfill its specific function without compromising the other, resolving the contradiction between conveying reliability and belt strength.
Solution Approach 2:
The conveyor belt uses a composite structure combining an elastic layer (first thermoplastic material) and a surface resin layer (second thermoplastic material with lower hardness). This composite material approach enables the belt to simultaneously achieve high tensile strength from the elastic layer and high coefficient of friction from the surface resin layer, eliminating the trade-off between strength and conveying reliability.
2Force
If the hardness of the elastic layer is decreased to increase the coefficient of friction, then the coefficient of friction is improved, but the belt strength decreases
Solution Approach 1:
The functional separation into elastic layer and surface resin layer allows the surface layer to be optimized for friction (lower hardness, softer material) while the elastic layer maintains optimal hardness for strength. This segmentation resolves the contradiction by assigning different hardness requirements to different layers.
Solution Approach 2:
Different parts of the conveyor belt have different local properties: the elastic layer has higher hardness for strength, while the surface resin layer has lower hardness for friction. This local quality differentiation allows each region to be optimized for its specific function, resolving the contradiction between friction and strength at the material level.
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 provides a conveyor belt with balanced stretchability, elasticity, and strength, ensuring reliable object conveyance even at inclinations with a coefficient of static friction between 0.5 to 1.0 and tensile strength of 3.5 to 35 MPa, while maintaining abrasion resistance.
Implementation Method 1
the coefficient of static friction of the conveying surface is defined to 0.5 to 1.0, and thus the conveyor belt of the invention can reliably convey an object to be conveyed even in inclined conveyance
Implementation Method 2
an elastic layer that is provided on an upper surface of the knitted fabric and is made of a first thermoplastic material; the tensile strength of the conveyor belt is 3.5 to 35 MPa
Data Source
Figure 1~3
AI summary
Provided is a conveyor belt that has sufficient stretchability and elasticity, and sufficient strength, and is capable of reliably conveying an object to be conveyed even in inclined conveyance. The conveyor belt includes: a stretchable knitted fabric 15; an elastic layer 14 that is provided on an upper surface of the knitted fabric 15 and is made of a first thermoplastic material; and a surface resin layer 20 that is provided on an upper surface of the elastic layer 14, is made of a second thermoplastic material having hardness lower than hardness of the first thermoplastic material, and the surface resin layer 20 includes a conveying surface 21 having unevenness. Tensile strength of the conveyor belt is 3.5 to 35 MPa, and a coefficient of static friction of the conveying surface 21 is 0.5 to 1.0.