Thermoplastic Elastomer Bearing Coating via Thermal Fusion
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Solution Overview
Problem
The conventional method of coating rolling bearings with urethane rubber is costly and time-consuming due to the need for long curing times, extensive equipment, and processes like sandblasting and adhesive application, making large-scale production challenging.
Innovation Solution
A thermoplastic elastomer enveloping layer is formed by thermally fusing a thermoplastic elastomer onto the outer surface of the bearing, eliminating the need for sandblasting and adhesive application, and allowing for a more efficient manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If urethane rubber is used to coat the outer circumferential surface of the outer ring, then wear resistance and adhesion are improved, but the manufacturing process becomes complex and time-consuming due to sandblasting, adhesive application, and long curing times
Solution Approach 1:
The patent changes the material parameter from crosslinking-type urethane rubber to thermoplastic elastomer, which fundamentally alters the bonding mechanism from chemical crosslinking to thermal fusion. This parameter change eliminates the need for sandblasting and adhesive application, as the thermoplastic elastomer can be directly molded onto the outer ring surface through heat and pressure, simplifying the manufacturing process while maintaining wear resistance and adhesion properties
Solution Approach 2:
The patent extracts and removes the adhesive layer from the manufacturing process. By using thermoplastic elastomer that can be directly molded onto the outer ring, the intermediate adhesive step is completely eliminated, reducing process complexity and manufacturing time while maintaining the bonding strength between the coating and the outer ring
2Reliability
If urethane rubber is cured in a mold for a long time, then proper adhesion and curing are achieved, but production efficiency decreases and equipment cost increases
Solution Approach 1:
The patent changes the curing mechanism parameter from long-duration chemical crosslinking to short-duration thermal fusion. Thermoplastic elastomers can be rapidly molded and cooled to achieve proper adhesion, reducing the curing time from hours to minutes and significantly improving production efficiency while maintaining adhesion quality
Solution Approach 2:
The patent rushes through the bonding process by using thermal fusion instead of slow chemical crosslinking. The thermoplastic elastomer is quickly heated to melting point, molded onto the outer ring, and then rapidly cooled to solidify, completing the adhesion process in a fraction of the time required for traditional urethane rubber curing
3Reliability
If sandblasting and adhesive application processes are used, then proper surface preparation and bonding are achieved, but manufacturing cost and time increase
Solution Approach 1:
The patent extracts and eliminates the sandblasting and adhesive application steps from the manufacturing process. By using thermoplastic elastomer that can be directly molded onto the outer ring surface, these preparatory steps become unnecessary, simplifying manufacturing while maintaining bonding quality through the thermal fusion process
Solution Approach 2:
The thermoplastic elastomer performs the surface bonding function directly without requiring external adhesive agents. The material itself provides the bonding capability through thermal fusion, making the system self-sufficient and eliminating the need for separate adhesive application and surface preparation processes
4Manufacturing precision
If polishing is performed after curing to achieve accurate dimensions, then surface finish precision is improved, but additional processing time and equipment requirements increase
Solution Approach 1:
The patent performs the surface finishing action during the molding process itself rather than as a separate post-processing step. The thermoplastic elastomer is molded onto the outer ring with the desired final dimensions and surface finish already incorporated, eliminating the need for subsequent polishing operations and reducing manufacturing 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 approach enables the cost-effective mass production of bearings with a thermoplastic elastomer enveloping layer, improving manufacturing efficiency and reducing production costs while maintaining effective friction and noise reduction.
Implementation Method 1
the enveloping layer includes an outer circumferential surface layer formed by thermally fusing a thermoplastic elastomer
Data Source
AI summary
A structure includes an enveloping layer formed on one of a circular outer surface or a flat outer surface having irregularities, wherein the enveloping layer includes an outer circumferential surface layer formed by thermally fusing a thermoplastic elastomer. The enveloping layer has a first material layer provided on one of the outer surfaces and formed from an amorphos plastic, and a second material layer provided on the first material layer and formed from a thermoplastic elastomer selected from the group consisting of styrenes, olefins, polyvinyl chlorides, urethanes and polyesters.