Washing Machine Anti-Vibration Rubber With High Loss Factor
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Solution Overview
Problem
Current anti-vibration rubber technologies for washing machines do not adequately reduce vibration, particularly at high spin speeds, as they fail to maintain a high loss factor within the operational temperature range of -10°C to 40°C, leading to resonance and increased noise.
Innovation Solution
Development of an anti-vibration rubber with a high loss factor of 0.4 or more at 30 Hz across the temperature range of -10°C to 40°C, utilizing a polymer component mainly containing halogenated butyl rubber, a metal oxide as a vulcanizing agent, and a tackifying resin to enhance vibration reduction and processability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional anti-vibration rubber is used, then the washing machine can operate at high spin speeds, but vibration and noise increase due to resonance in the intermediate speed region
Solution Approach 1:
The patent changes the physical-chemical parameters of the rubber material by specifying precise compositional ratios (polymer component 5-50 parts, tackifying resin 5-60 parts, processing aid 0.1-10 parts per 100 parts polymer). This composition adjustment modifies the loss factor characteristics to maintain high vibration damping across the operating speed range, resolving the resonance issue without sacrificing spin speed capability
Solution Approach 2:
The patent creates a composite anti-vibration rubber material combining multiple components: polymer (provides base elasticity), tackifying resin (enhances adhesion and damping), and processing aid (improves manufacturability). This composite structure achieves superior vibration reduction performance across the full temperature and speed range compared to conventional single-material solutions
2Object-affected harmful factors
If the loss factor is increased to reduce vibration, then vibration reduction improves, but the rubber may lose its elastic support function
Solution Approach 1:
The patent optimizes the loss factor parameter to a specific range (0.3 or more at 30 Hz and 25°C) while maintaining appropriate elastic properties. The controlled composition ensures the rubber provides sufficient loss factor for vibration damping while retaining the elastic support function needed for washing machine operation
Solution Approach 2:
The patent applies different functional properties to different aspects of the rubber material: the polymer component provides elastic support, while the tackifying resin specifically enhances the loss factor for vibration damping. This differentiation allows simultaneous optimization of both support capability and vibration reduction
3Ease of manufacture
If standard rubber composition is used, then manufacturing is simple, but vibration reduction is insufficient at high spin speeds
Solution Approach 1:
The patent modifies the compositional parameters within practical manufacturing ranges, allowing standard mixing and processing techniques to be used. The processing aid component specifically addresses manufacturability while the overall composition achieves superior vibration reduction, maintaining ease of manufacture without sacrificing performance
Solution Approach 2:
The patent uses commercially available polymer, tackifying resin, and processing aid materials that can be readily sourced and processed using conventional rubber manufacturing techniques, avoiding the need for specialized or expensive materials while achieving the desired vibration reduction performance
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 anti-vibration rubber effectively reduces vibration and noise in washing machines by maintaining a high loss factor at high spin speeds, improving the overall operational stability and reducing resonance.
Implementation Method 1
the anti-vibration rubber has a maximum loss factor at a temperature of −10° C. to 40° C., both inclusive, and has a loss factor of 0.4 or more
Implementation Method 2
vibration can be reduced by increasing a loss factor, which is an index of vibration energy absorption
Data Source
AI summary
An anti-vibration rubber of the present invention is an anti-vibration rubber for washing machines. In temperature variance measurement of dynamic viscoelasticity at a frequency of 30 Hz, the anti-vibration rubber has a maximum loss factor at a temperature of −10° C. to 40° C., both inclusive, and has a loss factor of 0.4 or more in the entire temperature range of −10° C. to 40° C., both inclusive, at the frequency of 30 Hz.