JP3648828B2 - Nonwoven sheet manufacturing method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and an apparatus for producing a non-woven sheet in which a uniform web is formed on a collection conveyor.
[0002]
[Prior art]
Conventionally, a so-called spunbond method is known as one method for producing a nonwoven fabric sheet. In this method, a group of yarns spun from a base having a plurality of holes is sucked together with a suction pipe having an air soccer to be stretched to a predetermined fineness, and provided at the outlet of the suction pipe. The nonwoven fabric sheet having a predetermined width and thickness is manufactured by colliding with a colliding plate to be opened and sucking the opened yarn bundle onto a collecting conveyor provided below.
[0003]
[Problems to be solved by the invention]
However, for the purpose of improving productivity in recent years, the web width has been increased to 3 m or more, and the number of holes in the die and the amount of polymer discharged per single hole have been increased. Increased air consumption in air soccer for sucking and drawing the spun yarn, and a large amount of accompanying airflow generated by the sucked yarn being ejected together with air The problem of becoming has arisen.
[0004]
In addition, the demand for thin sheets has increased due to increased spinning volume and user demands, and as a result, the speed of the collection conveyor has been increased to 50 m / min or more, so that a uniform web can be placed on the collection conveyor. Since it is necessary to form, a large amount of air flow ejected from the suction pipe described above from the lower surface of the collecting conveyor, an accompanying air flow generated by the ejected air, and an accompanying air flow generated by running the collecting conveyor. It is necessary to suck air.
[0005]
However, a large amount of accompanying air other than the amount of air ejected from the air soccer will flow from around the collection conveyor, and in recent wide facilities, the amount of air supplied to the central portion of the collection conveyor is small. Run short. For this reason, the yarn that is ejected from the suction tube and collided with the collision plate is not easily sucked uniformly on the collection conveyor, and the charged yarn rises or is conveyed on the collection conveyor. There is a problem in that the final manufactured sheet has defects such as turning over, and the desired quality cannot be obtained.
[0006]
The present invention has been made in view of the above-mentioned drawbacks of the prior art, and effectively replenishes a large amount of accompanying downward airflow generated by the airflow ejected from the yarn suction pipe together with the yarn from above. It aims at providing the manufacturing method and apparatus of a nonwoven fabric sheet which can form a uniform web on a collection conveyor.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a method for producing a nonwoven fabric sheet according to the present invention is to suck a plurality of yarn groups melt-spun from a base arrayed in the width direction of the nonwoven fabric sheet with a yarn suction tube having an air soccer. And a method of manufacturing a non-woven fabric sheet that forms a web by suction-collecting the opened yarn group on a collection conveyor, which is impact-charged and opened on a collision plate provided on the suction pipe outlet side. in the above has been a large number arranged in the sheet width direction, provided with a spinning chamber surrounding the suction opening of the yarn suction pipe with an air sucker, and blowing airflow duct for supplying conditioned air to the spinning chamber, the the temperature-adjusted air supplied to the spinning chamber, in the vicinity of the yarn suction pipe, and characterized in that Desa flow toward the installed collecting conveyor direction in the lower part of the spinning chamber.
[0008]
The nonwoven fabric sheet manufacturing apparatus of the present invention sucks a plurality of yarn groups melt-spun from a base arranged in the width direction of the nonwoven fabric sheet with a yarn suction pipe having an air soccer ball, and collide charged impingement plate provided on the tube exit side opening, the apparatus for manufacturing the nonwoven fabric sheet forming the web by sucking collecting yarn group and the open fiber onto the collecting conveyor, the sheet width A spinning chamber surrounding the suction port of a yarn suction pipe having an air soccer ball, which is arranged in a number of directions, is provided, an air flow outlet duct for supplying temperature-controlled air into the spinning chamber, and a spinning chamber supplied to the spinning chamber A temperature-controlled air was installed in the lower part of the spinning chamber in the vicinity of the yarn suction pipe.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings.
[0010]
FIG. 1 is a schematic side view of the nonwoven fabric production apparatus of the present invention, FIG. 2 is a schematic front view, and FIG. 3 is a detailed view of a yarn suction pipe outlet.
[0011]
A yarn group Y spun from a melt spinneret 2 having a plurality of spinning holes incorporated in the spin block 1 is sucked by a yarn suction tube 4 having an air soccer 3 and stretched to a predetermined magnification. At the same time, it is ejected from the ejection nozzle 5 at the outlet of the yarn suction pipe 4 together with the compressed air, and is impact-charged and opened by a collision plate 6 provided in front. The opened yarn Y ′ is collected by suction on a collection conveyor 7 installed in the lower part of the spinning chamber 14 .
[0012]
The collection conveyor 7 is made of wire mesh or synthetic resin net, and a suction box having a plurality of support members 8 for supporting the collection conveyor 7 in the width direction and the traveling direction on the lower surface of the yarn collection portion. 9, and the suction fan 10 sucks and collects the air flow ejected from the yarn suction pipe 4, the accompanying airflow generated by the ejected airflow, and the accompanying airflow generated by the traveling of the collection conveyor 7. The web 11 is conveyed, and a non-woven fabric sheet 13 that is heat set is formed by a nip-type heating roll device 12 provided at the outlet, and is wound by a winder (not shown).
[0013]
In the present invention, a spinning chamber 14 surrounding the spinning yarn from the spin block 1 to the yarn suction tube 4 is provided. The spinning chamber 14 is constituted by a plate or a sheet member. Reference numeral 16 denotes a temperature-controlled air blowing duct, which stabilizes the cooling state of the yarn Y spun from the melt spinning nozzle 2 by keeping the spinning chamber at a predetermined temperature, and also regulates the temperature-controlled air blown into the spinning chamber 14. As shown in FIG. 3, the yarn 15 flows out from the yarn suction tube 4 in the vicinity of the yarn suction tubes 4 arranged in the width direction of the nonwoven fabric sheet in the downward direction, that is, in the direction of the collecting conveyor 7. A large amount of accompanying air flow generated by the air flow ejected with the strip is supplied.
[0014]
Since the attachment portion of the yarn suction pipe 4 has fallen objects such as polymer waste and yarn waste from the melt spinneret 2 parts, it has a double upper and lower structure as shown in FIG. 3, and the upper cover 17 is easily attached and detached. It is preferable. Reference numerals 18 and 18 'denote air flow passages which are preferably formed of a wire mesh or a perforated plate from the viewpoint of facilitating the air flow in the lower direction and preventing falling objects on the collecting conveyor.
[0015]
【The invention's effect】
In the wide apparatus, since the air flow ejected from the suction pipe together with the yarn and the accompanying air flow generated by the air flow in the downward direction is effectively replenished from the upper spinning chamber, Since the lateral air flow from the machine side can be suppressed, the opened state of the yarn group which is ejected and impact-charged to the collision plate is improved. In addition, since it is possible to prevent turning defects due to the airflow of the web sucked and conveyed on the collection conveyor, it is possible to provide a high-quality nonwoven fabric manufacturing method and apparatus that are free from defects even if it is wide and thin. it can.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a nonwoven fabric production apparatus according to the present invention.
FIG. 2 is a schematic front view of FIG.
FIG. 3 is a detailed view of a yarn suction tube outlet.
[Explanation of symbols]
1: Spin block 2: Base 3: Air soccer 4: Yarn suction pipe 5: Injection nozzle 6: Colliding plate 7: Collection conveyor 8: Collection conveyor support member 9: Suction box 10: Suction fan 11: Web 12: Heating roll 13: Nonwoven fabric sheet 14: Spinning chamber 15: Temperature control air 16: Temperature control air outlet duct 17: Upper covers 18, 18 ': Ventilation passage

Claims (5)

A plurality of yarn groups melt-spun from the bases arranged in the width direction of the nonwoven fabric sheet are sucked by a yarn suction tube having an air soccer ball, and impact charging is performed on a collision plate provided on the suction tube outlet side. It is allowed to spread, in the manufacturing method of the nonwoven fabric sheet forming the web by sucking collecting yarn group and the open fiber on a collecting conveyor, which is arranged in plural numbers in the sheet width direction, with an air soccer A spinning chamber is provided to surround the suction port of the yarn suction tube, and an air blowing duct for supplying temperature-controlled air into the spinning chamber, and the temperature-controlled air supplied into the spinning chamber are arranged in the vicinity of the yarn suction tube. in the nonwoven sheet manufacturing method which comprises bringing Desa flow towards the collecting conveyor direction and is disposed below the spinning chamber. A plurality of yarn groups melt-spun from the bases arranged in the width direction of the nonwoven fabric sheet are sucked by a yarn suction tube having an air soccer ball, and impact charging is performed on a collision plate provided on the suction tube outlet side. is allowed to spread, the apparatus for manufacturing a nonwoven fabric sheet forming the web by sucking collecting yarn group and the open fiber on a collecting conveyor, which is arranged in plural numbers in the sheet width direction, with an air soccer A spinning chamber is provided to surround the suction port of the yarn suction tube, and an air blowing duct for supplying temperature-controlled air into the spinning chamber, and the temperature-controlled air supplied into the spinning chamber are arranged in the vicinity of the yarn suction tube. The apparatus for producing a nonwoven fabric sheet according to claim 1, further comprising an airflow passage that flows out toward a collecting conveyor installed in a lower portion of the spinning chamber . The apparatus for producing a non-woven fabric sheet according to claim 2, wherein the air flow passage is constituted by an attachment portion of a yarn suction pipe. 4. The nonwoven fabric sheet manufacturing apparatus according to claim 2, wherein the airflow passage has a double structure and the upper cover is detachable. The apparatus for producing a non-woven fabric sheet according to any one of claims 2 to 4, wherein the airflow passage is constituted by a metal mesh or a perforated plate.

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