Abstract: Sound-attenuating mufflers and muffler inserts, and systems and uses of such mufflers and muffler inserts. Continuous fiberglass roving is fed to a pneumatic jet head which fluffs the roving and presents the fluffed roving to a delivery wand at the exit end of the jet head. The delivery wand is moved along a predetermined three-dimensional path such that the wand delivery tip travels along a predetermined three-dimensional path inside a mold while-depositing fluffed fiberglass strands into the mold along the predetermined path. A terminal end portion of a liquid resin conduit is mounted to the fiberglass-dispensing wand, as part of the delivery tip, and drip-feeds liquid resin onto the fiberglass as the fiberglass is being deposited in the mold. The undulating, up and down movement of the delivery tip produces a wave-like undulating pattern in the appearance of the rovings in the resulting molded product.

Abstract: Sound-attenuating mufflers and muffler inserts, and systems and methods for fabricating such muffler inserts. Continuous fiberglass roving is fed to a pneumatic jet head which fluffs the roving and presents the fluffed roving to a delivery wand at the exit end of the jet head. A jet head/wand assembly is moved along a three-dimensional path such that the wand delivery tip travels along a predetermined three-dimensional path inside a mold thereby depositing the continuous, fluffed fiberglass strands in the mold along the predetermined path. A terminal end portion of a liquid resin conduit is mounted to the fiberglass-dispensing wand, as part of the delivery tip, and drip-feeds liquid resin onto the fiberglass as the fiberglass is being deposited in the mold. The undulating, up and down movement of the delivery tip produces a wave-like undulating pattern in the appearance of the rovings in the resulting molded product.

Abstract: Sound-attenuating mufflers and muffler inserts, and systems and methods for fabricating such muffler inserts. Continuous fiberglass roving is fed to a pneumatic jet head which fluffs the roving and presents the fluffed roving to a delivery wand at the exit end of the jet head. A jet head/wand assembly is moved along a three-dimensional path such that the wand delivery tip travels along a predetermined three-dimensional path inside a mold thereby depositing the continuous, fluffed fiberglass strands in the mold along the predetermined path. A terminal end portion of a liquid resin conduit is mounted to the fiberglass-dispensing wand, as part of the delivery tip, and drip-feeds liquid resin onto the fiberglass as the fiberglass is being deposited in the mold. The undulating, up and down movement of the delivery tip produces a wave-like undulating pattern in the appearance of the rovings in the resulting molded product.