Singeing machine for carpet yarns has cooling stage at downwards angle directly after singe burner with sharp deflection to spin off singed particles into collection container

摘要

The singeing machine (100) for singeing yarns, and especially spun thermoplastic filament yarns for carpets, has a system for the continuous removal of singed particles from the moving yarns. The yarns (3) pass through a singe burner (10), and through a following unit where the singed particles are removed. A cooling stage (15) follows the singe burner (10), without altering the yarn (3) path. The cooling stage (15) has a sufficient length to ensure that the singed particles have lost their adhesion at the end of the cooling stage, to fall clear and be collected at the cooling stage outlet. The particle collector has a container (20) which is open to the moving yarn (3) path. The cross section of the container opening matches the flight path of the separated particles. The singe burner (10) is at the upper section of the housing (1) of the singeing machine (100). The moving yarns (3) follow an angled downwards path (7) away from the burner (10). The opening of the particle collection container is below the outline of the cooling stage (15). A deflection roller (9) for each yarn strand (3) is at the end of the cooling stage (15), for the yarns (3) to be deflected upwards round an acute angle (12), away from the cooling stage (15) into an ejection stage (16). The length of the ejection stage (16) is one-third to two-thirds the length of the cooling stage (15). A further deflection roller (13) for each yarn strand (3) is at the housing (1) at the upper end of the ejection stage (16), to lead them out of the machine housing. The cooling stage (15) has a min. length of 1.2 m. The yarns (3) pass down through the cooling stage (15) at an angle (11) of 45-75 deg to the horizontal. The deflection rollers (9,13) have a diameter of 15-30 mm, where the yarns (3) pass round them. The deflection rollers (9,13) are mounted on shafts, where their ends are at an axial gap of at least 5 cm from the yarn guide grooves at the rollers. Each deflection roller (9) has its own shaft, or the rollers rotate on a shaft. The guide grooves round the deflection rollers (9,13) are at the base of a V-shaped cross section. The cooling stage (15) has a suction system (21,22) over the moving yarn strands (3) to extract the flame gases as they emerge from the singe burner (10). A spray unit (19) sprays a fluid mist at the yarns (3) as they move through the cooling stage (15). The singe burner (10) is a gas burner as described in EP814185-A2, controlled through measurements of the temp. of the emerging singed yarn and/or the gases from the burner.