Method of making a speaker edge containing isocyanate and polyol
AssigneesInoac Corporation, Matsushita Electric Industrial Co., Ltd.
InventorsSinya Mizone, Shinya Kaneko, Kiyosi Ikeda, Hiroko Yamasaki
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Abstract
It is an object of the present invention to provide a speaker edge which is high in strength, less in scattering of f0, high in waterproofness, small in amplitude at the time of resonance, easy to mold, and easy to be integrated with a cone body. That is, the present invention provides a speaker edge constituted by a molding which is molded in a manner so that a speaker edge raw material composition containing isocyanate and polyol is injected into a cavity of a mold by an agitating/mixing apparatus and subjected to reaction, foaming and curing in the cavity.
Claims11
A speaker edge comprising a molding which is molded by:
- injecting a speaker edge raw material composition containing isocyanate and polyol into a cavity of a mold by an agitating/mixing apparatus;
- and
- subjecting the speaker edge raw material to reaction, foaming and curing in the cavity,
- wherein a composition having viscosity in a range of from 100 cps to 100,000 cps at room temperature immediately after mixing is used as the speaker edge raw material composition.
A speaker edge comprising a molding which is molded by:
- injecting a speaker edge raw material composition containing isocyanate and polyol into a cavity of a mold by an agitating/mixing apparatus;
- and
- subjecting the speaker edge raw material to reaction, foaming and curing in the cavity,
- wherein density in thin base portions of a bent portion is higher than that in other thick portions.
A speaker edge comprising a molding which is molded by:
- injecting a speaker edge raw material composition containing isocyanate and polyol into a cavity of a mold by an agitating/mixing apparatus;
- and
- subjecting the speaker edge raw material to reaction, foaming and curing in the cavity,
- wherein density of the speaker edge is in a range of from 0.15 g/cm3 to 0.9 g/cm3.
A speaker edge comprising a molding which is molded by:
- injecting a speaker edge raw material composition containing isocyanate and polyol into a cavity of a mold by an agitating/mixing apparatus;
- and
- subjecting the speaker edge raw material to reaction, forming and curing in the cavity;
- wherein a surface of the speaker edge is composed of a skin layer to which a mold is transferred,
- wherein a composition having viscosity in a range of from 100 cps to 100,000 cps at room temperature immediately after mixing is used as the speaker edge raw material composition.
A speaker edge comprising a molding which is molded by:
- injecting a speaker edge raw material composition containing isocyanate and polyol into a cavity of a mold by an agitating/mixing apparatus;
- and
- subjecting the speaker edge raw material to reaction, forming and curing in the cavity;
- wherein a surface of the speaker edge is composed of a skin layer to which a mold is transferred,
- wherein density in thin base portions of a bent portion is higher than that in other thick portions.
A speaker edge comprising a molding which is molded by:
- injecting a speaker edge raw material composition containing isocyanate and polyol into a cavity of a mold by an agitating/mixing apparatus;
- and
- subjecting the speaker edge raw material to reaction, forming and curing in the cavity;
- wherein a surface of the speaker edge is composed of a skin layer to which a mold is transferred,
- wherein density of the speaker edge is in a range of from 0.15 g/cm3 to 0.9 g/cm3.
Dependencies are inferred from the claim text.