Preparation method of sound absorbing material, the sound absorbing material and filling method of same

Abstract

The invention discloses a preparation method of a sound absorbing material, the sound absorbing material and a filling method of same. The preparation method comprises the following steps: (S1) preparing a non-foamed slurry material; (S2) producing a flammable material framework and a shape-cover container, and placing the flammable material framework into the shape-cover container; (S3) forming the non-foamed slurry material in the shape-cover container to form a wet formed body; (S4) drying the wet formed body to form a dry formed body; and (S5) roasting the dry formed body, wherein the flammable material framework is burned off during the roasting step to form three-dimensional throughout channels. The preparation method is simple in operations. The three-dimensional throughout channels are formed in the sound absorbing material so that sound absorbing effect is improved. The sound absorbing material, which is prepared through the preparation method disclosed in the invention, has the three-dimensional throughout channels therein, so that the sound absorbing material is good in the sound absorbing effect. The filling method includes the steps of pre-fabricating the sound absorbing material and filling it into a to-be-filled space, so that the sound absorbing material is fully filled in the to-be-filled space.

Description

technical field [0001] The invention relates to the technical field of material preparation, and more specifically, to a method for preparing a sound-absorbing material, a sound-absorbing material and a filling method thereof. Background technique [0002] In pursuit of better sound quality, the speaker (SPK) or speaker box (SPKBOX) responds to the frequency (f 0 ) requirements are getting higher and higher. Constrained by the increasingly thin structure and performance characteristics of micro-speakers, if the response frequency (f 0 ), it is necessary to add sound-absorbing materials inside. At present, the commonly used sound-absorbing materials for speakers (SPK) mainly include foamed foam, such as polyurethane, melamine, etc.; and non-foamed sound-absorbing materials such as activated carbon, zeolite, etc. Among them, non-foamed sound-absorbing materials are more superior in terms of acoustic performance gain than foamed sound-absorbing materials. Non-foamed sound-ab...

AI Technical Summary

Problems solved by technology

The particles prepared by the above method are relatively dense, with small specific surface area and pore volume, which will affect the mass transfer efficiency of the airflow inside the sound-absorbing particles when the speaker (SPK) is working, and the sound-absorbing effect will be greatly reduced.

Although the oil ammonia column forming method and the oil column forming method can obtain particles with relatively uniform particle size and internal physical structure, they are limited to the complex structure of the rear acoustic cavity of the loudspeaker (SPK) product, and the packaging part of the sound-absorbing part occupies a considerable part of the rear acoustic cavity space. Make full use of the rear acoustic cavity to fill the space, and have limited effect on optimizing the acoustic performance of speaker (SPK) products

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