Method and machine for producing a sound-deadening insert for silencer of an exhaust-gas discharge system of an internal-combustion engine
AssigneeSO.LA.IS—Societa′ Lavorazione Isolanti S.R.L. Con Unico Socio
InventorJuan Martin Bowie
Life of this patent
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Abstract
A method for producing a sound-deadening insert of a silencer of an exhaust-gas discharge system in an internal-combustion engine of a vehicle; the method comprises the steps of providing a mattress made up of continuous voluminized fibers of sound-deadening material, and needling the mattress so as to cause a compacting/interweaving of the fibers in order to obtain compacting lines.
Claims12
A method for producing a sound-deadening insert (1) of a silencer of an exhaust-gas discharge system in an internal-combustion engine of a vehicle;
- the method being characterized in that it comprises the steps of:
- providing a flexible mattress (5) comprising continuous voluminized fibres (6) of sound-deadening material having a plurality of turns arranged coaxial to each other, the fibres being wound around a winding axis (A);
- and
- carrying out one or more needling operations on the mattress (5) within, respectively, one or more pre-set surface strips of the mattress (5) itself in such a way as to interweave the continuous fibres (6) locally so as to obtain, respectively, one or more compacting lines (2) of compacted fibres (6), each of which extends without interruption along said mattress (5) in a direction transverse to the continuous fibres (6) and keeps the continuous fibres (6) joined together locally so as to prevent the mattress (5) from opening up.
A sound-deadening insert needling machine (9) configured to provide a sound-deadening insert (1) for a silencer of an exhaust-gas discharge system in an internal-combustion engine of a vehicle:
- said needling machine (9) being characterized in that it comprises:
- conveyor means (19), which are structured to receive at least one flexible mattress (5) on a resting surface (P) and displacing the mattress (5) keeping it on said resting surface (P) along an pre-set axis of feed (T);
- said mattress (5) comprising continuous voluminized fibres (6) of sound-deadening material having a plurality of turns arranged coaxial to each other, said fibres being wound around a winding axis (A);
- one or more needling members (21), which are structured to carry out one or more needling operations on the mattress (5) during its advance along said axis of feed (T), within, respectively, one or more pre-set surface strips of the mattress (5) itself in such a way as to interweave the continuous fibres (6) locally so as to obtain, respectively, one or more lines (2) of compacted fibres (6), each of which extends without interruption along said mattress (5) in a direction transverse to the continuous fibres (6) and keeps the continuous fibres (6) joined together locally so as to prevent the mattress (5) from opening up.
A silencer sound-deadening insert (1) of an exhaust-gas discharge system in an internal-combustion engine of a vehicle;
- said silencer sound-deadening insert (1) comprising a flexible mattress (5) made up of continuous voluminized fibres (6) of sound-deadening material having a plurality of turns arranged coaxial to each other, the fibres being wound around a winding axis (A) and having one or more needled lines (2) of compacted fibres (6) that extend without interruption along the mattress (5) transverse to said fibres (6) and are designed to keep the fibres (6) locally joined together so as to prevent the mattress (5) from opening up.
Use of a sound-deadening insert (1) in a silencer of an exhaust-gas discharge system in an internal-combustion engine of a vehicle;
- said sound-deadening insert (1) comprising a flexible mattress (5) made up of continuous voluminized fibres (6) of sound-deadening material having a plurality of turns arranged coaxial to each other said fibres being wound around a winding axis (A) and having one or more needled lines (2) of compacted fibres (6) that extend without interruption along the mattress (5) transverse to said fibres (6) and are designed to keep the fibres (6) locally joined together so as to prevent the mattress (5) from opening up.
Dependencies are inferred from the claim text.