RU2003105789A - INSTALLATION FOR CONTINUOUS MANUFACTURE OF NONWOVEN FIBERGAN FABRIC FROM THREADS - Google Patents

Claims (10)

1. Installation for the continuous manufacture of a non-woven fibrous web made of aerodynamically stretched threads of thermoplastic plastic, containing a die (1), a cooling chamber (2) designed to introduce process air into it to cool the threads from the air supply chamber (8), unit (4) stretching with a low-tension channel (5) and a deposition device for depositing filaments for a nonwoven fibrous web, wherein the air supply chamber (8) is adjacent to the cooling chamber (2) and is divided at least into two parts (8a, 8b) with the possibility of extracting process air from each of them with a different temperature, and the connection between the cooling chamber (2) and the stretching unit (4) is isolated from the environment and made without the possibility of air intake. 2. Installation according to claim 1, characterized in that the process air with a temperature in the range from 15 to 75 ° C, preferably in the range from 18 to 70 ° C, comes from the initial part (8a) of the chamber, while the process air with a temperature between 15 and 38 ° C, preferably between 15 and 35 ° C, comes from the second part (8b) of the chamber. 3. Installation according to any one of claims 1 or 2, characterized in that the distance between the jet holes (9) of the die (1) in the middle of the die (1) is greater than in the outer zones. 4. Installation according to any one of claims 1 to 3, characterized in that between the die (1) and the chamber (8) of the air supply, a monomeric suction device (27) is made for suctioning the gases generated during the spinning process. 5. Installation according to any one of claims 1 to 4, characterized in that an intermediate channel (3) is located between the cooling chamber (2) and the stretching unit (4), while the intermediate channel (3) is tapered in a vertical section from the exit from cooling chambers (2) to the input of the low tension channel (5) of the tension unit (4), the intermediate channel (3) being made with the possibility of regulating various angles guiding the thread. 6. Installation according to any one of claims 1 to 5, characterized in that the convergence unit (6) with at least one diffuser (13, 14) is located near the stretching unit (4). 7. Installation according to claim 6, characterized in that the convergence unit (6) comprises a first diffuser (13) and an adjacent second diffuser (14), and a gap (15) is provided between the first diffuser (13) and the second diffuser (14) for air inlet. 8. Installation according to any one of claims 1 to 7, characterized in that the deposition device is equipped with a continuously moving deposition grid (7) deposition for filaments of non-woven fibrous fabric and at least one suction device located under the deposition grid (7). 9. Installation according to claim 8, characterized in that, in the direction of movement of the deposition lattice (7), at least three separate suction zones are arranged one after another, while the primary suction zone (19) is located in the deposition zone of the threads of the nonwoven fibrous web , an initial suction zone (18) is provided in front of the deposition zone, and a second suction zone (20) behind the deposition zone. 10. Installation according to claim 9, characterized in that the suction force of the primary suction zone (19) is regulated independently of the suction force of the initial suction zone (18) and the second suction zone (20).