RU2018111083A - DEVICE FOR MANUFACTURING FILLERED NONWOVEN MATERIALS FROM ELEMENTARY THREADS - Google Patents

Claims (13)

1. A device for the manufacture of spunbond nonwoven materials from filaments (1), in particular from a thermoplastic with at least one die (2) for forming filaments (1), at least one cooling device (3) for cooling the threads with at least one pulling device (7) for pulling the threads and with at least one storage device, in particular in the form of a storage mesh tape (21) for patching the threads for non-woven material, and between the drawing device ( 7) and funded arrangement At least one diffuser (10) is located by means of a storage mesh or storage tape (21), so that the filaments and primary air pass from the extraction device into the diffuser (10), and in the area of at least one diffuser (10) at least two input gaps (11, 12) located on opposite sides of the diffuser (10) for secondary air through which the secondary air enters the diffuser (10), and at least one inlet gap (11, 12) for secondary air, preferably at least two inlet gaps (11, 12) for secondary air, it is made in such a way that the secondary air enters at an angle of entry α to the direction FS of the passage of threads or to the longitudinal central plane M of the device or diffuser (10), moreover, this angle of entry α is less than 100 °, expediently less than or equal to 90 ° preferably less than 80 °, preferably less than 70 ° and, in particular, less than 65 °, moreover, in the direction of passage of threads, the last section of the diffuser in the direction of the storage device has expanding walls (18) of the diffuser, and these walls (18) are diff the patterns form the outlet (19) of the diffuser with a width B in the direction (MD) along the machine, with at least one exhaust device for pumping air or process air through the storage device or through the storage mesh tape (21) and, moreover, the exhaust zone (23) located below the diffuser outlet (19) has a width b in the direction along the machine that is larger than the width B of the diffuser outlet (19). 2. The device according to claim 1, wherein the width b of the exhaust zone (23) is at least 1.2 times, preferably at least 1.3 times, and particularly preferably at least 1.4 -fold width B of the diffuser outlet (19). 3. The device according to claim 1 or 2, moreover, the exhaust zone (23) relative to the direction (MD) along the machine behind the accumulation zone of threads around the first exhaust section (24) protrudes beyond the outlet (19) of the diffuser and / or, moreover, the exhaust the area relative to the direction (MD) along the machine in front of the area of accumulation of threads around the second exhaust section (25) extends beyond the outlet (19) of the diffuser. 4. The device according to any one of claims 1 to 3, moreover, pumping through the exhaust device is carried out under the condition that, at least in the area of the outlet (19) of the diffuser, tertiary air passes along the outer surfaces of the walls (18) of the diffuser in the direction of the storage device or storage mesh tape (21), moreover, the tertiary air flows are preferably oriented parallel or mainly parallel to the mixed stream from the primary flowing in the direction of the outlet (19) of the diffuser inside the diffuser (10) air and secondary air, with tertiary air is also pumped through the storage device via a storage or mesh belt (21). 5. The device according to any one of claims 1 to 4, wherein the volumetric flow of tertiary air VT evacuated by means of an exhaust device is at least 25%, preferably at least 40% and particularly preferably at least 50% by volume the flow of evacuated flows of primary air and secondary air. 6. The device according to any one of claims 1 to 5, and the unit from the cooling device (3) and the extraction device (7) is made in the form of a closed unit, and in addition to the supply of cooling air in the cooling device there is no flow of any other fluid and what Any other air in this enclosed unit. 7. The device according to any one of claims 1 to 6, and in the area of the input gaps for secondary air, the ratio of the volumetric flows of primary air and secondary air Vp / Vs is less than 5, preferably less than 4.5. 8. The device according to any one of claims 1 to 7, and in the direction of passage of the threads behind the inlet gaps for secondary air or lower they are adjacent to the narrowing section (15) of the diffuser. 9. The device according to claim 8, and in the direction of passage of the threads to the narrowing section (15) of the diffuser, a bottleneck of the diffuser (10) is adjacent and, moreover, at least one expanding section (17) of the diffuser is adjacent to the bottleneck. 10. The device according to claim 9, wherein the length l _{k of the} tapering portion (15) of the diffuser is from 5 to 50% and preferably from 10 to 50% of the length L of the entire diffuser (10). 11. The device according to claim 9 or 10, wherein the ratio l _K / l _{D of the} length l _{K of the} tapering portion (15) of the diffuser to the length l _{D of the} expanding portion (17) of the diffuser is from 0.1 to 1, preferably from 0.15 to 0.9. 12. The device according to any one of claims 1 to 11, wherein the angle β of the diffuser outlet to the longitudinal central axis M of the diffuser (10) is at most 30 °, preferably at most 25 °. 13. The device according to any one of claims 1 to 12, and the distance from the diffuser (10) or the lower edge of the diffuser (10) to the storage device or to the storage mesh tape (21) is from 20 to 300 mm, in particular from 30 to 150 mm and preferably from 30 to 120 mm.