Method for producing a fibrous mat for the acoustic and/or thermal insulation of a component of a motor vehicle
AssigneeSO.LA.IS—Societa′ Lavorazione Isolanti S.R.L. Con Unico Socio
InventorLuigi Zara
Life of this patent
Estimating the term…
Abstract
Method for producing a fibrous mat, which can be installed in a component of a vehicle provided with an internal combustion engine for acoustically and thermally insulating the component. The method comprises the steps of: providing a fibrous core consisting of at least one fibrous bundle that extends along a direction that is approximately parallel to a longitudinal axis; wrapping the outer surface of the fibrous core by means of a fibrous bundle that extends along a direction that is approximately transverse to the bundle of the fibrous core, thus providing at least one outer tubular fibrous containment sleeve that extends, in turn, along the longitudinal axis and covers the outer surface of the fibrous core to trap the fibrous core therein.
Claims15
A method for producing a fibrous mat which is without resin, amalgam, or both and is designed to be installed in a silencer of an exhaust gas system of an internal combustion engine of a vehicle to attenuate noise and heat associated with exhaust gas passing through the exhaust gas system, said fibrous mat is designed to be wrapped around or fitted in associated pipes, tubular perforated partitions, exhaust ducts passing through a chamber of the silencer, the method comprising:
- providing a fibrous core by winding a first fibrous bundle around two axes that are perpendicular to a longitudinal axis and are mutually spaced at a distance approximately equal to the length of the fibrous mat so as to form an elongated wound skein that extends along the longitudinal axis;
- and
- wrapping an outer surface of the fibrous core with a second fibrous bundle to form an outer tubular fibrous containment sleeve that extends along the longitudinal axis to internally retain the first fibrous bundle and trap the fibrous core within the outer tubular fibrous containment sleeve;
- wherein the fibrous core and the outer tubular fibrous containment sleeve comprise mineral fibers which attenuate the noise and heat transmission due to exhaust gas passing through the exhaust duct, and an inner space of the outer tubular fibrous containment sleeve is filled by the fibrous core, the fibrous core being simultaneously trapped by the outer tubular fibrous containment sleeve;
- wherein the first fibrous bundle corresponds to the second fibrous bundle.
A soundproofing and heat-insulating fibrous mat which is free of one or both of resins and amalgams and is designed to be installed in a silencer of an exhaust gas system of an internal combustion engine of a vehicle to attenuate noise and heat associated with exhaust gas passing through the exhaust gas system, the fibrous mat is designed to be wrapped around or fitted in an associated pipe or exhaust duct passing through a chamber of the silencer, the fibrous mat comprising:
- a fibrous core including a first fibrous bundle, which at least partially extends along a direction approximately parallel to a longitudinal axis;
- and
- a second fibrous bundle wrapped around an outer surface of the fibrous core so as to form an outer tubular fibrous containment sleeve that extends along the longitudinal axis to internally retain and trap the fibrous core within the outer tubular fibrous containment sleeve;
- wherein the first fibrous bundle is wound around two axes that are perpendicular to the longitudinal axis and are mutually spaced at a distance approximately equal to the length of the fibrous mat to form an elongated wound skein that extends along the longitudinal axis, wherein the fibrous core and the outer tubular fibrous containment sleeve comprise mineral fibres which attenuate the noise and heat transmission due to the exhaust gas passing through the ducts, and
- wherein the first fibrous bundle corresponds to the second fibrous bundle.
Dependencies are inferred from the claim text.