Abstract: Systems and methods for multi-material mesh generation from fill-fraction voxel model data are discussed. Voxel representations of model data are used to generate robust and accurate multi-material meshes. More particularly, a mesh generation pipeline in a virtual fabrication environment is described that robustly generates high-quality triangle surface and tetrahedral volume meshes from multi-material fill-fraction voxel data. Multi-material topology is accurately captured while preserving characteristic feature edges of the model.

Abstract: A method and system for the production of a web the fibers of which form a mean angle with respect to the longitudinal direction. The method and system include the passage of the web through a looping system, the passing of the web over a conveyor provided with brushes, the deposition of a first pre-needle-punched layer of fibers over the accumulated undulations, the assembling of the accumulated undulations with the first pre-needle-punched layer by needling, the assembling of the structure with a second pre-needle-punched layer of fibers, so as to obtain a sandwich structure, and the separation of the sandwich structure so as to obtain two symmetrical velour coverings. The web is a card web with a mean angle between 5 and 10° and an area density between 80 and 120 g/m2. The method includes a longitudinal drawing of the web, with a stretch ratio between 1.5 and 2.

Abstract: A manufacturing method includes: a step for producing a batt of fibers, elongated in a longitudinal direction, by batting with interlacing of the fibers, a step for passing the batt of fibers, in the longitudinal direction, through a loop-forming device having a set of rotary discs and stationary loop-forming elements, so as to generate undulations, and, following the passing step, a step for bringing the batt of fibers onto a conveyor equipped with brushes, and accumulating the undulations in the brushes so as to achieve a predetermined density.

Abstract: A manufacturing method includes: a step for producing a batt of fibers, elongated in a longitudinal direction, by batting with interlacing of the fibers, a step for passing the batt of fibers, in the longitudinal direction, through a loop-forming device having a set of rotary discs and stationary loop-forming elements, so as to generate undulations, and, following the passing step, a step for bringing the batt of fibers onto a conveyor equipped with brushes, and accumulating the undulations in the brushes so as to achieve a predetermined density.

Abstract: A carpet or other interior piece for an automobile vehicle includes a non-woven web of needled fibers forming a velvet face layer and a sole. The fibers of the web include at least 50% by mass and preferentially at least 75% by mass of hollow fibers. The velvet density of the web is greater than or equal to 0.04 g/cm3 and preferentially comprised between 0.04 g/cm3 and 0.06 g/cm3. This results in a velvet from which solid wastes are easily cleaned, while limiting the production costs.

Abstract: A method for manufacturing a piece of interior equipment of an automotive vehicle includes: obtaining a first web of fibers on a conveyor, the first web including a first layer of fibers forming a sole, and a second layer of fibers intended to form a velvet; depositing a second web of fibers and obtaining an assembly; needling the assembly; heating the needled assembly to a heating temperature, and obtaining a coating; and thermoforming the coating and a lower portion at a forming temperature in order to obtain the piece. The second web has continuous fibers with a single component having a melting temperature, the assembly further including a binding layer deposited on the sole of the first web, the binding layer in majority including at least one thermoplastic polymer having a melting temperature greater than the forming temperature and less than the melting temperature of the single component.

Abstract: A method for manufacturing a piece of interior equipment of an automotive vehicle includes: obtaining a first web of fibers on a conveyor, the first web including a first layer of fibers forming a sole, and a second layer of fibers intended to form a velvet; depositing a second web of fibers and obtaining an assembly; needling the assembly; heating the needled assembly to a heating temperature, and obtaining a coating; and thermoforming the coating and a lower portion at a forming temperature in order to obtain the piece. The second web has continuous fibers with a single component having a melting temperature, the assembly further including a binding layer deposited on the sole of the first web, the binding layer in majority including at least one thermoplastic polymer having a melting temperature greater than the forming temperature and less than the melting temperature of the single component.

Abstract: A carpet or other interior piece for an automobile vehicle includes a non-woven web of needled fibers forming a velvet face layer and a sole. The fibers of the web include at least 50% by mass and preferentially at least 75% by mass of hollow fibers. The velvet density of the web is greater than or equal to 0.04 g/cm3 and preferentially comprised between 0.04 g/cm3 and 0.06 g/cm3. This results in a velvet from which solid wastes are easily cleaned, while limiting the production costs.