JPS63165526A - Production of lap for comber - Google Patents

Abstract

PURPOSE:To obtain a lap for comber having uniform thickness along the width and heavy lap weight, by producing a 1st lap composed of plural laminated fleeces produced by collecting and drafting a number of silvers, drafting the 1st lap and laminating a number of the drafted 1st laps. CONSTITUTION:In the 1st step, a number of (12 in the figure) slivers S are collected with each of a number of (3 in the figure) draft heads 2 and drafted to form a number of sheet fleeces. The fleeces are stacked one upon another and wound to obtain a 1st lap LP1. In the subsequent 2nd step, a number of (6 in the figure) fleeces drawn from the 1st lap LP1 are drafted by separate draft heads 8, tracked one upon another and wound to obtain a 2nd lap LP2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a combed wrap.

[Prior art] - The conditions required for wraps for combing are that the weight per unit length is heavy in order to cope with high-speed combing, that feeding to the combing can be done with a tip hook, that an appropriate draft can be achieved, In order to satisfy these conditions as much as possible, the manufacturing process for combed wrap has been to collect a large number of card slivers using a sliver wrap machine and create a sheet-like fleece. This process consists of the steps of: winding this into a wrap; and using a ribbon wrap machine, a plurality of the wraps are rewound and drafted into a sheet-like fleece, and a plurality of the wraps are polymerized and wound into a wrap.

■A card sliver is drafted using a filament machine to spin a filamentous sliver, a large number of filamentous slivers are collected and drafted using a wrap forming machine to form a fleece, and this fleece is further polymerized and rolled up. Those that form wraps for combing are known.

Problems to be Solved by the Invention According to item (2) above, the draft by the sliver wrap machine is as low as about 1.8, and the number of doublings is about 20.
Also, with the ribbon wrap machine, 6 layers of fleece are stacked and a draft of about 5.5 is applied, so the total draft is 10.
, the total doubling is also limited to about 120, and the finished combed wrap has little draft, so the parallelism of the fibers is poor and the amount of cotton shedding at the comb increases, and because there is little doubling, the weight of the wrap per unit length fluctuates. The drawback is that the wrap weight is large and the weight of the wrap per unit length is low.

On the other hand, since the sheet-like fleece is drafted and further polymerized, the thickness of the rolled-up wrap in the width direction is uniform, which has the advantage that the wrap can be held securely by the comber and the combing action is performed extremely smoothly. There is. In addition, according to ■, the total draft and total doubling are larger than ■, which reduces the amount of cotton dropped in the comber and increases the weight of wrap per unit length, making it possible to cope with the high productivity of recent high-speed combers. , Since the combed wrap is formed directly from the sliver that has been fried by a filament machine, the uniformity of the thickness in the width direction of the combed wrap is inferior to that in ① above.
There is a problem.

Means for Solving the Problems The present invention has the advantage (uniformity in the width direction) of the prior art described above.
It is intended to obtain a combed wrap with a heavy wrap weight per unit length, and the brake trough 1-
A plurality of draft heads each having a zone and a main draft zone are provided, and a plurality of card slivers are collected together in each of these draft heads and drafted with a larger draft than a conventional sliver wrapping machine to form a sheet-like fleece. After that, there is a step of vertically polymerizing the fleece and winding it into a first wrap, and a step of drafting the plurality of first wraps using a plurality of corresponding draft heads, and then polymerizing the fleece vertically to form a second wrap. It consists of a winding process.

Function: In the above step, after the sheet-like fleece is drafted in the second step, it is further polymerized so that the thickness of the combed wrap in the IJ force direction is uniform, and
To obtain a wrap for combing that can increase the draft in a first step, increase both the total draft and total doubling, and have a heavy wrap weight.

Embodiment FIG. 1 shows a wrap forming machine LF that performs the first step of the present application.
2 is a can in which the card slivers S are collected, and 2 is a can that collects a plurality of these card slivers S (12 in this embodiment), changes the direction of movement to a right angle, and then drafts them to form a sheet. This is a draft head for forming a shaped fleece, and three sets of these draft heads 2 are arranged in parallel. This draft head 2 is provided with three bottom rollers 3 and four top rollers 4, as shown in FIG. Main draft zone B is composed of: In the brake draft zone A, a slight draft is applied before the main draft in the main draft zone B to loosen the mutual entanglement of the fibers, and to ensure the draft action in the main trough 1-zone B. It is. Conveyor bells H, 5 are disposed so as to circulate below each draft head 2, and the fleece spun from each draft head 2 is sequentially piled up by a press roller 7 and sent to a winding section 6. It is intended to be transported.

The winding section 6 winds up the polymerized fleece into a first wrap LPI. Next, FIG. 3 shows a ribbon wrap machine RLM that carries out the second process of the present application, in which a plurality of troughs 1 and heads 8 (
6 places) are installed in parallel, and in front of each is a curl plate 9.
is arranged so that the first lap LPI is rewound and drafted into a fleece, and the direction of movement is changed by 90 degrees. A table 10 is disposed below the plurality of draft heads 8, and each of the draft heads 8...
The fleece spun from each draft head 8...
・Sequentially overlap the winding section 1 with the transfer presser roller 11 corresponding to
2, the first winding section 12 winds up the polymerized fleece into a second wrap LP2.

According to such a process, in the first process, each can 1
The 12 card slivers S supplied from the card slivers S are collected and firstly loosened from intertwining with each other in the brake draft zone A, then trafted in the main draft zone B, and spun as a fleece by each draft head 2. It will be done. Each time the fleece is placed on the conveyor belt 5 and passes under the draft head 2, it is pressed down by a presser roller 7 and overlapped, and then wound into a first lap LPI by a winding section 6.

The thus wound first wrap LPI is then transferred to the ribbon wrap machine RLM. Draft head 8...
- Then, the first wrap L P 1 is rewound for each draft head and drafted as fleece 8. The direction of the drafted fleece is changed by the curl plays 1 to 9, and while being transferred on the table 10 under the curl plate 9, the fleece is overlapped by the transfer presser roller 11 and wound into a second wrap LP2. For comparison, the first step was a draft of 2.7 and the doubling was 36, and the second step was a draft of 5.
5. If the weight of the card sliver S supplied as doubling 6 is 62 gelens/yard, the weight of the second wrap LP2 is 62X36x6/(2,7X5.5)=902
It is a slope/yard, and the conventional technology ■ (62X20X
6/(1,8x5.5) = 750 slopes/yard), the weight of the wrap can be made considerably heavier.

Effects of the Invention As described above, the present invention includes a plurality of draft heads each having a brake draft zone and a main draft zone, and each of these drum heads collects and drafts a plurality of card slivers into a sheet shape. After forming the fleece into a fleece, a step of vertically polymerizing the fleece and winding it into a first wrap, and a step of drafting the plurality of first wraps respectively with a plurality of draft heads corresponding thereto, and then polymerizing the fleece vertically. Since the combing wrap preparation process consists of the process of winding the sliver into the second wrap, the draft amount in the first process can be larger than that of conventional sliver wrap machines, making it possible to obtain a product with a heavier wrap weight per unit length. Even if the fibers have good parallelism and the weight of the wrap can be increased, the first wrap formed in the first step is returned to a fleece shape in the second step and this fleece is drafted. to polymerize,
The finished second wrap has good uniformity in the width direction, and the fibers can be gripped accurately when placed in a comb.

There are advantages such as ensuring the combing action in the comb.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a wrap forming machine that performs the first step of the present invention, and FIG. 2 is a sectional view of the draft head of FIG. 1. FIG. 3 is a plan view of a ribbon wrapping machine that performs the second process of the present application.

Claims (1)

[Claims] 1. A plurality of draft heads each having a brake draft zone and a main draft zone are provided, and each of these draft heads collects and drafts a plurality of card slivers to form a sheet-like fleece. a step of polymerizing a plurality of wraps and winding them into a first wrap, and drafting the plurality of first wraps with a plurality of draft heads corresponding thereto,
A method for producing a combed wrap, characterized by comprising the steps of vertically polymerizing and winding into a second wrap.