Endless Belt Vulcanization Adhesion and Edge Protection
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Solution Overview
Problem
The existing methods for manufacturing endless belts through vulcanization bonding face issues with low attachability of adhesion processing materials to the surface rubber, leading to peeling and decreased work efficiency, and the durability of the belts is compromised due to material degradation and cracking at the edges.
Innovation Solution
The method involves improving adhesion by buffing the surface rubber to roughen it, attaching adhesion processing materials to a wider area than the unvulcanized rubber sheets, and ensuring the adhesion processing material extends beyond the edges of the unvulcanized rubber sheets to prevent peeling, followed by vulcanization bonding with a gas-permeable heat-resistant film to enhance durability and surface quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesion processing material is attached to step surfaces for endless belt manufacturing, then bonding between belt ends is enabled, but the attachability is low causing peeling and decreased work efficiency
Solution Approach 1:
The patent applies preliminary action by roughening the surface rubber before attaching the adhesion processing material. This pre-treatment creates a rougher surface that improves subsequent adhesion, preventing peeling during the vulcanization process and eliminating the need for rework, thereby maintaining both bonding reliability and work efficiency
2Manufacturing precision
If adhesion processing material is exposed at the edges of the depression, then the bonding structure is visible, but the material degrades causing cracking and complete peeling
Solution Approach 1:
The patent applies local quality by extending the unvulcanized rubber sheet beyond the edges of the depression, creating an overlapping region that locally reinforces the edge area. This additional rubber layer protects the exposed adhesion processing material from degradation and cracking, while maintaining proper alignment and bonding precision
3Ease of manufacture
If unvulcanized rubber sheets are pressed with roller before vulcanization, then pressure joining is achieved, but peeling occurs before vulcanization due to low adhesion
Solution Approach 1:
The patent applies preliminary action by roughening the surface rubber before attaching the adhesion processing material and unvulcanized rubber sheets. This pre-roughening creates better adhesion from the start, ensuring that the sheets remain firmly attached during the pressing operation and throughout the vulcanization process, eliminating peeling issues
4Shape
If buffing is performed to improve external appearance, then edges become visible, but adhesion processing material degrades and causes cracking
Solution Approach 1:
The patent applies local quality by extending the unvulcanized rubber sheet beyond the buffed edges, creating a protective overlay that covers the degraded adhesion processing material. This allows the buffing to improve external appearance while the extended rubber prevents cracking and maintains edge integrity
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 approach enhances the work efficiency of the vulcanization process and results in a highly durable endless belt with improved surface appearance and reduced post-bonding finishing operations, while preventing air accumulation and creases on the belt surface.
Implementation Method 1
coating the unvulcanized rubber sheets with a gas-permeable heat-resistant film
Implementation Method 2
the unvulcanized rubber sheets are vulcanized to bond to the adjacent rubber
Data Source
AI summary
A method for manufacturing an endless belt includes: coating a depression that is formed between both belt longitudinal ends of surface rubber of a belt and to which an adhesion processing material is attached, with at least one layer of unvulcanized rubber sheet; and vulcanizing the unvulcanized rubber sheet to bond the unvulcanized rubber sheet to the surface rubber, in which A is less than B, where A is a belt longitudinal distance between a belt longitudinal edge of an interface of the unvulcanized rubber sheet and the adhesion processing material and a belt longitudinal edge of the depression, and B is a belt longitudinal distance between a belt longitudinal edge of an area to which the adhesion processing material is attached and the belt longitudinal edge of the depression.