JPS6018335B2 - Equipment that converts continuous fiber bundles into slivers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for cutting continuous fibers of synthetic fibers into a desired length or range of lengths and converting them into slivers.

The continuous fibers (hereinafter referred to as tow) of synthetic fibers are cut into a desired fiber length to form short fiber groups, and the short fiber groups are immediately and actively applied to a flat card without disturbing the arrangement of the fibers. A method for continuously forming a sliver from crimped tow is known from Japanese Patent Publication No. 48-2396.

However, in the case of the above sliver manufacturing method, the weight of the short fibers supplied to the cylinder is only about 0.3 m/min, and therefore the production capacity of carded sliver is low.

This problem can be solved by increasing the supply of short fibers to the taker-in roller by the detshu plate and feed roller, but with the current structure, the supply amount within the above range is optimal. If the short fiber group is supplied in excess of this amount, the short fiber group cannot be smoothly supplied to the taker-in roller. In the present invention, the short fibers in a bulky state after being cut are gradually compressed on the way to the taker-in roller immediately before being delivered to the taker-in roller, and are then supplied in a compressed state to the taker-in roller of a flat card. The short fibers are supplied to the surface of the cylinder at a high density of 2 to 4 ta', thereby greatly improving the sliver production capacity.The configuration of this invention is shown in the drawings below. A series of sliver manufacturing devices consisting of a combination of a tow cutting device and a flat card will be described as follows.

In Fig. 1, the tow 1 passes through a tension control device (not shown) such as a curved rod installed on a creel, passes through a separating roller 2 while maintaining its thickness and width constant, and is fed into a feed loaf. A pair of cutter rollers 4
is supplied to

On the circumferential surface of this pair of cutter rollers 4, upright protruding blades with the same pitch are spirally provided, and furthermore, the helical directions of the doyuudachi protruding blades are opposite to each other, and the sliding action of the upright protruding blades The tow is continuously and completely cut diagonally to form short fiber groups 5 having a predetermined fiber length. The tow is separated into two layers and supplied to the cutter roller 4 through a tow separating device, and bias cutting can also be selected as necessary. Also, it is preferable to make the roller cover of one of the cutter loafs 4 slightly larger. The cut short fiber group 5 is transported toward the dish plate 7 by the lower transport apron 6 without disturbing the fiber arrangement.

The bulky short fiber group 5 placed on the lower transfer apron 6 is placed in front of the dish plate 7 and on the lower transfer apron 6, as shown in FIG. The upper layer is gradually compressed during the transfer by the upper transfer apron 8 provided at an angle, and the relative speed difference between the upper and lower transfer aprons 6 and 8 prevents the positional shift between the upper and lower layers. The short fibers reach between the dish plate 7 and the feed roller 9 without losing the parallelism between the short fibers. FIG. 3 shows another embodiment for compressing a group of short fibers, in which a compressor is placed in front of the dish plate 7 and on the lower transfer apron 6, and instead of the transfer apron from the front to the far side, the speed A plurality of transfer rollers 11 having different differences are arranged diagonally and the operation is the same as that shown in FIG.

The short fiber group 5 compressed to a desired density in the above manner is supplied to the taker-in roller 12 from between the dish plate 7 and the feed roller 9.

Taker-in roller 12, cylinder 13 and doffor
14 are rotating in the directions of the arrows, and the short fiber group 5 supplied to the taker-in roller 12 is transferred to the taker-in roller 12, the taker-in cover 15, and the moat knife 1.
6. Working together with the under casing 17, the short fiber group 5
The impurities contained in the water are removed. In addition, if there is a small amount of impurity, the moat knife 16 may be removed and the under casing 17 may be extended to the upper left until it reaches the dish plate. The short fiber group 5 transferred from the taker-in roller 12 to the cylinder 13 further transfers between the cylinder 13 and a flat bar 18 covering the upper half of the cylinder 13,
During this time, the fibers that have been subjected to carding action and adhered to the doffer 14 in the form of a thin film are scraped off to form a web 21, which falls onto a guide 22 provided at the bottom of the stripping roller 20. This web is squeezed into a predetermined lap shape and formed into a sliver by known means. Examples of the present invention will be described below.

Example 1 Tow was fed in the manner shown in FIG. 1 to obtain a group of willow short fibers with a fiber length of 51, which were fed through a flat card and bound in a bowl, and then spun yarn was obtained by a known method.

The results are compared with spun yarns spun by the conventional tow method and cut cotton method, and the results are as shown in the table below. Table 1 Cut fiber length 51. His Comparison Table Example 2 Tow was fed to the method shown in Figure 1 to obtain a group of short fibers with a fiber length of 76, which was then fed to a flat card and tied up in a bowl, and then processed by known means. A spun yarn was obtained.

The results are compared with spun yarns graded using the conventional tow method and cut line method, and the results are as shown in the following table. Table 2 Comparison table of cut fiber length 76 Example 3 Toe was fed to the method shown in Figure 1 to obtain a group of short fibers with a fiber length of 70 to 127 ribs, which were then fed with a flat card to make diluted cotton. Thereafter, a spun yarn was obtained by a known method.

The results are compared with spun yarns spun by the conventional tow method and cut line method, and the results are as shown in the following table. Table 3 Comparison table of cut fiber bundles 70 to 127 As is clear from the above results, when the sliver is produced by the present invention, compared to the two conventional methods, the weight supplied to the cylinder is 4 to 4. Moreover, the U% and number of neps of the spun sliver, as well as the U% and number of defects of the single yarn, were both equal to or better than those obtained by the conventional method.

Note that the present invention is not limited to the above embodiments.

As explained above, in this invention, continuous fibers are cut into a desired fiber length to form short fiber groups, and the short fiber groups after cutting are fed to a taker inloaf of a flat card to obtain a sliver. In the apparatus, the distance between the lower transfer apron and the upper transfer apron or transfer roller row for supplying the short fibers in a bulky state after cutting to the taker-in roller is gradually narrowed toward the taker-in roller. By arranging the short fibers at an angle and by giving a relative speed difference between the upper and lower transport speeds, the short fibers are compressed and supplied to the cylinder surface at a high density of 2 to 42 mm, which reduces the bulkiness of the fibers after cutting. While the short fibers are transferred to the taker-in roller by being sandwiched from above and below between the lower transfer apron and the upper transfer apron or the transfer roller row, the short fibers in the cross section perpendicular to the transfer direction are The number of slivers can be actively increased and the sliver can be compressed and supplied at high density, and the weight of the flat card fed to the cylinder can be greatly increased, increasing the production capacity of sliver compared to the conventional tow spinning process. Even in the treatment of short fibers with a fiber length of 35 to 15 cm, there is no decrease in performance and there is little damage to the fibers, so it is possible to improve the walking performance.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the entire device according to the present invention,
FIG. 2 is an enlarged explanatory view of the portion that supplies short fibers to the taker-in roller. FIG. 3 is a drawing showing another embodiment of this part. 1. ．． ．． ．． ．． ．． Tow, 2... Separating roller, 3...
... Feed roller, 4 ... Cutter roller, 5 ... Short fiber group, 6 ... Lower transfer apron, 7 ... Dish plate, 8. ...
... Upper transfer apron, 9... Feed roller, 11... Transfer arranged at an angle. -Ra group, 12... Taker in. -ra, 13...cylinder, 14...dotsfur, 15...7-car in cover,
16... Mort knife, 17... Under casing,
18... Flat bar, 20... Stripping roller, 21... Web. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1 The continuous fiber bundle is cut into a desired fiber length to form a short fiber group, and the short fiber group after cutting is placed in a device configured to supply the cut short fiber group to a taker-in roller of a flat card to obtain a sliver, and the bulky state after cutting is The interval between the lower transfer apron and the upper transfer apron or the transfer roller row for supplying the short fibers to the taker-in roller is arranged so as to gradually become narrower toward the taker-in roller, and the upper and lower transfer speeds are adjusted. An apparatus for converting a continuous fiber bundle into a sliver, characterized in that short fibers are compressed and supplied to a cylinder surface at a high density of 2 to 4 g/m^2 by giving a relative speed difference.