Expandable Foam and Manufacturing Method thereof, and Speaker
AssigneesAac Acoustic Technologies (Shenzhen) Co., Ltd., AAC Microtech (Changzhou) Co., Ltd.
InventorsHezhi Wang, Jie Zhang, Zhongyang Wang
Life of this patent
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Abstract
The present disclosure provides a speaker including a chamber filled with the sound absorbing material. The chamber is also filled with expandable foam which is expandable by heating from a predetermined volume to a larger volume to limit the movement of the sound absorbing material in the chamber. The expandable foam is formed by compressing a foam impregnated with polymeric adhesive to the predetermined volume. The speaker provided by the present disclosure improves the reliability of the filled sound absorbing material.
Claims13
A speaker, including:
- a chamber filled with sound absorbing material;
- and
- an expandable foam filled in the chamber, which is expandable by heating from a predetermined volume to a larger volume to limit the movement of the sound absorbing material in the chamber;
- wherein
- the expandable foam is formed by compressing a foam impregnated with polymeric adhesive to the predetermined volume.
A method for manufacturing an expandable foam, including steps of:
- (a) providing a foam with a first volume;
- (b) impregnating the foam with polymeric adhesive;
- (c) compressing the foam impregnated with the polymeric adhesive to a second volume smaller than the first volume, and obtaining the expandable foam.
A speaker, including:
- a chamber filled with sound absorbing material;
- and
- an expandable foam filled in the chamber, wherein the expendable form is performed by steps of:
- (a) providing a foam with a first volume;
- (b) impregnating the foam with polymeric adhesive;
- (c) compressing the foam impregnated with the polymeric adhesive to a second volume smaller than the first volume;
- (d) heating the compressed foam and the compressed foam expanding from the second volume to a third volume greater than the second volume.
Dependencies are inferred from the claim text.