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New material soundproof outer barrel

An anti-noise, new material technology, applied in washing devices, applications, other washing machines, etc., can solve the problems of airflow noise and user trouble, and achieve the effect of reducing airflow noise and noise.

Inactive Publication Date: 2012-01-18
NANJING LG PANDA APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, because the existing outer cylinder 100' has inner and outer reinforcing ribs 41', 42' with complex structures, the outer cylinder 100' generates airflow noise during high-speed rotation, which is also the noise of the washing machine. main source
The noise generated during the use of the washing machine has caused a lot of trouble to the user

Method used

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  • New material soundproof outer barrel
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  • New material soundproof outer barrel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 75% (weight) copolymerized polypropylene, 10% (weight) treated barium sulfate, 14% (weight) treated glass fiber, 0.9% (weight) antioxidant, 0.1% (weight) calcium stearate Add it into a high-speed mixer to make it fully mixed evenly, and then knead in a twin-screw extruder. The temperature of each section of the twin-screw system is: T1=180°C, T2=190°C, T3=195°C, T4=200 °C, T5 = 205 °C, T6 = 210 °C, the rotational speed of the twin-screw extruder is r = 300 rpm, and finally, the strands are extruded, cooled and pelletized to obtain the modified polypropylene material.

Embodiment 2

[0027] 65% (weight) of copolymerized polypropylene, 20% (weight) of treated barium sulfate, 14% (weight) of treated glass fiber, 0.8% (weight) of antioxidant, 0.2% (weight) of calcium stearate Add it into a high-speed mixer to make it fully mixed evenly, and then knead it in a twin-screw extruder. The temperature of each section of the twin-screw system is: T1=185°C, T2=190°C, T3=195°C, T4=205 °C, T5 = 210 °C, T6 = 215 °C, the rotational speed of the twin-screw extruder is r = 300 rpm, and finally, the strands are extruded, cooled and pelletized to obtain the modified polypropylene material.

Embodiment 3

[0029] 55% (weight) of copolymerized polypropylene, 30% (weight) of treated barium sulfate, 14% (weight) of treated glass fiber, 0.7% (weight) of antioxidant, 0.3% (weight) of calcium stearate Add it into a high-speed mixer to make it fully mixed evenly, and then knead in a twin-screw extruder. The temperature of each section of the twin-screw system is: T1=185°C, T2=190°C, T3=200°C, T4=205 °C, T5 = 210 °C, T6 = 220 °C, the rotational speed of the twin-screw extruder is r = 300 rpm, and finally, the strands are extruded, cooled and pelletized to obtain the modified polypropylene material.

[0030] The materials used in the present invention obtained in Examples 1, 2, and 3 are compared with existing calcium carbonate modified polypropylene materials in mechanical experiments, thermal analysis experiments, melting experiments, hardness experiments, and noise experiments, and are evaluated and analyzed by the above experiments The performance of material of the present invention...

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Abstract

The invention relates to a new material soundproof outer barrel made from a new polypropylene modified soundproof material. The new material soundproof outer barrel comprises a bottom wall and a side wall, wherein the bottom wall and the side wall are enclosed into a containing cavity, the bottom wall is provided with an inner surface toward the containing cavity and an outer surface back toward the containing cavity, the inner surface is provided with a plurality of internal reinforcing ribs and an inner wall surface surrounding the exteriors of the internal reinforcing ribs, the inner side wall is in an annular shape, and at least half of the surface is continuous, so that the inner surface of the new material soundproof outer barrel is smoother, thus air flow noise is reduced and noise generated by the outer barrel is reduced; and meanwhile, the new polypropylene modified soundproof material adopted by the new material soundproof outer barrel comprises the following components in percent by weight: 10-85% of polypropylene, 10-70% of barium sulphate, 4-20% of glass fiber and 0.1-2% of coupling agent, thus ensuring that the new material soundproof outer barrel have the advantages of excellent mechanical properties and good added soundproof property.

Description

technical field [0001] The invention relates to an outer cylinder for a drum washing machine, in particular to a noise-proof outer cylinder adopting a new material and a new structure. Background technique [0002] The outer barrel of the existing drum washing machine is roughly divided into two types according to the material: a metal outer barrel and a plastic outer barrel. Because the material strength of the metal outer barrel is very high and the metal is made of thin metal plate, the inside can be made into a very smooth shape, but the material used for the metal outer barrel is expensive, and the productivity is worse than that of the plastic outer barrel, so the economy is not good. High, so now it is only limited to high-end drum washing machines. As for the plastic outer barrel, because the material used is polymer plastic, considering the strength of the outer barrel, many bending-resistant ribs will be designed on the outer barrel to improve the strength of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06F37/26C08L23/14C08K13/06C08K9/06C08K9/04C08K3/30C08K7/14C08K5/098
Inventor 崔寅鑫夏长植郭海峰
Owner NANJING LG PANDA APPLIANCES