JPS62125020A - Production of fiber bundle consisting of short fiber - Google Patents

Abstract

PURPOSE:To well arrange a web, facilitate the slip of the web on a receiving pan and stably obtain the titled product, by blowing breezes from both sides of a receiving pan provided between a doffer and calender rolls of a carding machine on both sides of a spun web. CONSTITUTION:A receiving pan 4 is first provided between a differ 1 and calender rolls 5 of a carding machine and breezes are blown from both sides of the receiving pan 4 on both sides of a spun web by a method for blowing out the breezes passing through, e.g. compressed air pipes 3 with holes perforated at a given interval and mounted above both sides of sidewalls of the receiving pan 4 from the above-mentioned holes, etc. Short fibers are then fed to the carding machine to strip a web from the doffer 1 and descent the web on the receiving pan 4 while suitable bundling with the breezes. The bundles web is then passed through the calender rolls 5 and contained in a can by a coiling device to afford the aimed product.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention uses a carding machine to process short fibers with extremely short fiber length and low entanglement. The present invention relates to a method for successfully producing IIi fiber bundles.

(Prior Art) It can be said that it is extremely difficult to make fiber bundles using synthetic fiber raw cotton, such as extremely short fiber length, thick denier, and rough, non-densified fibers, due to insufficient entanglement properties.

In other words, the raw cotton is separated into short fibers one by one using a carding machine, and then bundled into fiber bundles. However, in conventional carding machines, the short fibers are separated from the dots by a fly comb. Since the web lacks intertwining properties, it is difficult to maintain the web shape and transfer it to the calender roller.

In order to improve this problem, a tray with a certain elevation angle is installed to support the web and allow it to descend smoothly. Possible solutions include lowering it. However, webs of fibers that are severely lacking in entanglement tend to break laterally, and therefore tend to come into contact with the side walls of the tray and disturb both ends of the web, impairing the quality of the sliver and causing web breakage. This will significantly impair operability.

(Problems to be Solved by the Invention) It is an object of the present invention to solve the above-mentioned drawbacks, and even when spinning raw cotton with extremely insufficient entanglement properties, both ends of the web can be well-aligned, and the web can be easily The object of the present invention is to provide a method that allows fiber bundles to slide easily on a fiber plate, thereby making it possible to stably manufacture fiber bundles.

(Means for Solving the Problems) The method for producing a fiber bundle of the present invention that achieves the above-mentioned object consists of the following groove configuration.

That is, in a method for producing fiber bundles using a carding machine, in which the web stripped from a dower is bundled and stored in a coiling device after passing through a calender roller, a receiving tray is installed between the doffer and the calender roller; [This is a method for producing fiber bundles made of short fibers, which is characterized by blowing a breeze from both sides of the web toward both ends of the web.

(Function) Hereinafter, the method for manufacturing a fiber bundle made of short fibers of the present invention will be roughly explained in detail using drawings and the like.

The figure is a schematic perspective view of essential parts showing an example of a carding machine used to carry out the method for manufacturing fiber bundles of the present invention.

When spinning small staple fibers with poor entanglement using a carding machine,
dock? Since the web torn off with a fly comb has little intertwining of the fibers, it is difficult to maintain the web shape, and the web tends to sag and break easily. According to the findings of the present inventors, in order to improve this problem,
It is advantageous to provide a receptacle with a constant elevation angle to hold the web. Furthermore, even when spinning fibers that have a large degree of shrinkage and a large number of fibers and are generally highly entangled, both ends of the web tend to be easily disturbed. This tendency becomes more pronounced as the spinning speed increases, so in order to prevent disturbances at both ends of the web, it is necessary to converge both ends of the web with a belt, or to reduce the number of dots at each end of the web.
One possible method is to use flanged rollers at these locations to prevent disturbances, but these methods require a complicated mechanism.

Further, a web made of extremely short fibers without densification has poor retention properties and tends to generate fluff, and also has poor web transfer on a receiving tray.

The method of the present invention solves the above-mentioned problems by installing a tray between the docker and the calender roller and blowing a breeze from both sides of the tray toward both ends of the web. At the top of both ends of the side wall of the tray 4 provided between the dock 71 and the calender roller 5, a compressed air pipe 3 having an inner diameter of about 3 to 10 nm is installed.
Attach the calender roller 5 from a position several cm in front of the dower 1 to a distance of about 1Qcm (to between the straws), and make a hole of about 2 to 1Qcm in the lower side of the pipe with an inner diameter of about 1 to 5s.
At intervals of about m. The breeze passed through the compressed air pipe is blown downward from the saucer 4 through the aforementioned hole having an inner diameter of about 1 to 5 mm.

In the present invention, the shape of the saucer is not limited to that shown in the drawings, and other shapes may be used as long as they have the functionality of a saucer. .

(Effects of the invention) According to the method for producing a fiber bundle of the present invention as described above,
By blowing a breeze at both ends of the web, the web is excessively focused and turbulence is effectively prevented from occurring;
It becomes possible to continue manufacturing fiber bundles in a stable manner.

The strength of the breeze should be adjusted by looking at the blowing conditions at both ends of the web; if it is too strong, it may blow the web from the sides and have the opposite effect, and if it is too weak, it will not have the effect of focusing the web. However, it is relatively easy to find the conditions for continuous passage by making adjustments while observing the conditions at both ends of the web.

(Example) 50% by weight of polybutylene terephthalate fiber of 30 denier and fiber length 26n+m and 50% by weight of polybutylene terephthalate fiber of 5 denier and 20mm fiber length were opened with a cotton opening machine. A blended short fiber raw cotton was prepared. Then, according to the configuration of the carding machine shown in the figure, pipes with an inner diameter of 5 mm were attached to the upper part of both ends of the side walls of the receiver set at an elevation angle of 40 degrees, and holes with a diameter of 2 nm were placed at 2 cm intervals in the lower part of the pipe. After closing the web in this manner, and while spinning at a spinning speed of 5 m/min, compressed air was gradually blown out through the holes in the pipe to prepare both ends of the web.

By employing the method of the present invention, the web stripped from the dower by the fly comb is blown inwards by compressed air to a slightly larger extent for the thinner and easily cut parts of the web, and to a smaller extent for the thicker parts. It was possible to successfully spin the web in a state where it was wrapped from both ends.

Even when the spinning speed was roughly increased to 15 m/min, smooth spinning was possible.

[Brief explanation of drawings]

The figure is a schematic perspective view of essential parts showing one example of a carding machine that can be used to carry out the method for producing fiber bundles of the present invention. 1; Dosing fan 2; Fly comb 3; Pipe for compressed air 4; Receiver 5; Calendar roller 6; 2-inch calender roller 7; Tube wheel

Claims (1)

[Claims] (1) A method for producing a fiber bundle using a carding machine, in which the web stripped from a doffer is bundled, passed through a calender roller, and stored in a can by a coiling device, in which a receiving tray is installed between the doffer and the calender roller, and the receiving tray is A method for producing fiber bundles made of short fibers, which is characterized by blowing a breeze from both sides of the web toward both ends of the web.