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Loudspeaker diaphragm manufactured from fiber-reinforced resin based composite nanomaterial

A technology of nano-composite materials and fiber-reinforced resin, applied in the direction of diaphragm structure, etc., can solve the problems of poor sound effects of speakers and increased distortion, and achieve the effects of sufficient raw material supply, increased rigidity, and saving forest wood resources

Inactive Publication Date: 2012-12-05
马春彪 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a loudspeaker diaphragm made of fiber-reinforced resin-based nanocomposite material to solve the problems of poor sound effect and increased distortion of the loudspeaker

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] It is composed of the following raw materials in mass percentage:

[0025] Polypropylene resin: 87%;

[0026] Glass fiber, diameter 0.75mm, length 3mm: 12%;

[0027] Nano-montmorillonite particles, the average wafer thickness is 20nm: 1%;

[0028] The manufacturing method of the loudspeaker diaphragm that the fiber-reinforced resin-based nanocomposite material of the present invention makes comprises the following steps:

[0029] (1) According to the formula ratio, the polypropylene resin, glass fiber and nano-montmorillonite particles are sent into the mixer and mixed evenly, and then pressed into the blank of the required shape by the press molding machine.

[0030] (2) Put the billet into the honeycomb cell foam molding device, heat the device to 120°C and turn the screw inside the device, the billet is heated and melted and plasticized to form the matrix of the diaphragm, and inject high-pressure carbon dioxide gas To the inside of the device, the carbon dioxide ...

Embodiment 2

[0034] It is composed of the following raw materials in mass percentage:

[0035] Polypropylene resin: 81%;

[0036] Glass fiber diameter is 1.28mm, length is 4.5mm;: 16%;

[0037] Nano-montmorillonite particles, the average wafer thickness is 22.5nm: 3%;

[0038] The manufacturing method of the loudspeaker diaphragm that the fiber-reinforced resin-based nanocomposite material of the present invention makes comprises the following steps:

[0039] (1) According to the formula ratio, the polypropylene resin, glass fiber and nano-montmorillonite particles are sent into the mixer and mixed evenly, and then pressed into the blank of the required shape by the press molding machine.

[0040] (2) Put the billet into the honeycomb cell foam molding device, heat the device to 140°C and turn the screw inside the device, the billet is heated and melted and plasticized to form the matrix of the diaphragm, and inject high-pressure carbon dioxide gas To the inside of the device, the carbo...

Embodiment 3

[0043] It is composed of the following raw materials in mass percentage:

[0044] Polypropylene resin: 75%;

[0045] Glass fiber, diameter 1.8mm, length 6mm: 20%;

[0046] Nano montmorillonite particles with an average wafer thickness of 25nm: 5%;

[0047] The manufacturing method of the loudspeaker diaphragm that the fiber-reinforced resin-based nanocomposite material of the present invention makes comprises the following steps:

[0048] (1) According to the formula ratio, the polypropylene resin, glass fiber and nano-montmorillonite particles are sent into the mixer and mixed evenly, and then pressed into the blank of the required shape by the press molding machine.

[0049] (2) Put the billet into the honeycomb cell foam molding device, heat the device to 160°C and turn the screw inside the device, the billet is heated and melted and plasticized to form the matrix of the diaphragm, and inject high-pressure carbon dioxide gas To the inside of the device, the carbon dioxid...

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PUM

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Abstract

The invention relates to a loudspeaker diaphragm manufactured from a fiber-reinforced resin based composite nanomaterial, belonging to the fields of design and manufacture of electroacoustic devices and acoustic products. The loudspeaker diaphragm is manufactured from the following raw materials in percentage by weight: 75-87% of polypropylene resin, 12-20% of chopped fiber and 1-5% of nano inorganic additive. The loudspeaker diaphragm has the beneficial effects that: the used polypropylene resin raw material has abundant supply and low cost; compared with solid materials with the same size, the density of the loudspeaker diaphragm is greatly reduced, but the rigidity is significantly improved; and large-scale production and performance parameter control are easily achieved.

Description

technical field [0001] The invention belongs to the field of design and manufacture of electro-acoustic devices and audio products, in particular to a loudspeaker diaphragm, in particular to a loudspeaker diaphragm made of a composite material using polypropylene resin as a matrix, which is ultra-thin in thickness, high in specific stiffness and light in weight . Background technique [0002] The performance of the speaker diaphragm has a very important impact on the sound quality of the speaker. After the size and shape of the diaphragm is determined, the material and molding process of the diaphragm have a decisive impact on the performance and sound quality of the speaker. At present, the speaker diaphragm is mainly made of wood fiber or paper cone mainly made of wood fiber, which consumes a lot of forest resources, which is not conducive to environmental protection and sustainable development. [0003] In addition, traditional loudspeakers use cone-type diaphragms, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K7/14C08K7/10C08K3/34C08J9/30H04R7/02
Inventor 马春彪耿云瑶
Owner 马春彪
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