JPS5944404B2 - Adsorption twisting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a fiber bundle adsorption/heating device that adsorbs and heats a fiber bundle onto a mesh-like heating element traveling at high speed.

The separated supplied fibers are fed onto a mesh-like heating body running at high speed, and the fibers are adsorbed onto the heating body through the heating body by suction at the slit-shaped suction ports of the opposing suction ducts. The fiber bundle on the heating element can be heated at a high speed by rolling the heated fiber bundle around the axis of the heating element at high speed and taking it up in the long side direction of the slit-shaped suction port.

A device for heating such a fiber bundle is already known as an adsorption heating device. In this adsorption heating device, as shown in FIG. Since the heating body 3 is formed of a wire mesh or a perforated plate, there are the following problems when trying to improve heating efficiency.

That is, in the adsorption heating device, as shown in FIG.
As the heating element 3 travels, the fiber bundles 4 deposited on the heating element 3 made of a wire mesh or a perforated plate are attached to the duct wall 1 on the running direction side.
a and rolls on the duct wall 1a, but since the fiber bundle whose cross section has become approximately circular due to the transfer is sequentially transferred in the take-up direction, the fiber bundle moves on the duct wall 1a.
Most of the fiber bundles in the top nine columns always have a flattened cross section as shown due to the accumulation of new fibers.

The fiber bundle 4 thus deposited in a flat shape on the heating element 3 is attracted onto the heating element 3 by suction by the suction duct 1, but it is rotated in the opposite direction to the running direction of the heating element 3. In order for a person to move, a force must be given to support the transfer.

Since the suction by the suction duct 1 and the running of the heating body 3 apply the above-mentioned couple to the fiber bundle 4 (it goes without saying that this acts effectively, the air flow shown by the arrow in FIG. 1 causes the above-mentioned couple). It has been confirmed through various experiments conducted by the present inventors that this effect has a very large effect on the human body.

Particularly in the case where the fiber bundle 4 is deposited in a flat shape on the heating element 3 as described above, a certain large force couple is required when the fiber bundle 4 begins to transfer.

For example, the fiber bundle 4 can be regarded as a strip of paper, but in that case, the paper strip 5 as shown in FIG.
When transferring, a relatively large force is required to transition from the state shown in Figure A to the state shown in Figure S, and the transition from Figure 2 to State C is easily achieved by suction by the suction duct 1. It will be held on.

Therefore, making it possible for the flat fiber bundles on the heating body to easily start transferring is extremely effective for smooth adsorption heating and greatly contributes to improving heating efficiency.

From this point of view, the present invention aims to configure the structure of the heating body itself so that the fiber bundles deposited thereon can easily rotate, thereby increasing heating efficiency and spinning speed. .

The adsorption/heating device of the present invention splits and flies the supplied fibers, orients them in a certain direction onto the heating body running over the slit-shaped suction port of the suction duct, and collects them by adsorption. In a device that performs heating by running a body, the heating body is provided with a large number of holes that open toward the side opposite to the running direction on the surface of the heating body, and the unevenness of the surface of the heating body that occurs to form the holes. However, it is characterized in that it is constituted by a porous body having a gently curved surface that does not impede the transfer of adsorbed fiber bundles rolling on the surface in the direction opposite to the running direction.

Embodiments of the present invention will be described in detail below with reference to the drawings.

3 and 4 show the overall structure of the adsorption heating device of the present invention.

In the fiber separation device of this adsorption heating device, the sliver supplied to a trumpet 11 is fed at a constant speed by a feed roller 12, and the fiber separation roller 1 rotates at a variable speed.
The fibers are combed and separated by needles on the cylindrical surface of No. 3, and sent into the orientation duct 14 by centrifugal force and air flow.

Of course, the fiber splitting device is not limited to this type.

The orientation device also includes an orientation duct 14 that guides the fibers sent from the fiber splitting device to a slit-shaped orientation nozzle 14a;
It is equipped with a heating body 15 constituted by a drum-shaped porous plate and a suction duct 16 disposed within the heating body 15, and includes a slit-shaped orientation nozzle 14a at the tip of the orientation duct 14 and a slit-shaped suction port 16a of the suction duct 16. are arranged facing each other with the heating element 15 in between, but it is desirable to arrange these as close as possible.

The shapes of the slit-shaped orientation nozzle 14a of the orientation duct 14 and the slit-shaped suction port 16a of the suction duct 16 are long in the generatrix direction of the drum-shaped heating element 15, have a dimension at least equal to the fiber length, and have a dimension at right angles thereto. is formed sufficiently narrow.

Note that these orientation nozzles 14a and suction ports 16a are
Depending on the spinning conditions, the drum-shaped heating element may be slightly inclined with respect to the generatrix direction.

Further, the focused heating device is constituted by the heating body 15, a device for rotating it, and a device for sucking air from the suction duct 16 through the hollow shaft 17.

The drum-shaped heating body 15 has a bearing 1 around a hollow shaft 17.
A disc-shaped flange 20 rotatably supported by 8 and 19.
．． The flange 21 is attached to the outer periphery of the motor 22.
The suction duct 16 is arranged to face the orienting nozzle 14a in the heating body 15, and is led out from one end 17a of the suction duct 16 through the inside of the hollow shaft 17. is,
A suction device (not shown) is connected.

As shown in detail in FIGS. 5 to 7, the drum-shaped heating body 15 described above has a part of the metal plate bulged toward the surface side to form a bulged portion 31, and an opening 32 on one side of the bulged portion 31. , thereby forming holes 33 that open toward the side opposite to the running direction of the heating body, and a large number of these holes 33 are arranged on a metal plate to form a porous body. The unevenness on the surface of the heating element that occurs to form the heating element is made into a gently curved surface so that the transfer of the adsorbed fiber bundle 34 rolling on the surface is not hindered.

Although FIGS. 5 to 7 illustrate the shapes of the bulging portions 31 and the like in the porous body, the shape is not necessarily limited to such shapes.

Furthermore, the manner in which the large number of bulges 31 or holes 33 are arranged is not limited to the illustrated arrangement, and can be appropriately selected.

When forming the holes 33 in the porous body, the dimensions of each part should be determined in consideration of the following points.

Height H of the bulging portion 31: When the distance between the orientation nozzle 14a and the heating element 15 increases, the fibers oriented in a certain direction within the orientation nozzle 35 become shorter before reaching the heating element 15. There is a risk that the orientation of the nozzle may be disturbed, and for this reason, it is desirable to make the distance between the orientation nozzle and the heating body as small as possible, and therefore the height H needs to be made as small as possible.

Furthermore, in order to facilitate the transfer of fibers over the bulge 31, it is desirable to reduce its height.

However, the fiber bundle 34 deposited on the heating element is placed in the hole 33 opened on one side of the bulging part 31 in a state having a long flat cross section in the direction perpendicular to the surface of the heating element, as shown in FIG. Therefore, the height H needs to be high enough to form a hole large enough to absorb the spun yarn in a flat shape.

Width W of the hole 33: If the fibers adsorbed in the hole 33 are drawn into the hole by the suction of air in the hole 33, it will interfere with the transfer of the fiber bundle 34 as the heating element travels, and therefore The width W of 33 needs to be small enough to prevent the fibers from being drawn in.

When the pitch P of the holes 33 in the running direction of the heating element increases, the behavior of the fiber bundles 34 adsorbed by the holes while they move to the position of the next row of holes and are adsorbed by them becomes unstable. Therefore, the pitch P needs to be relatively small.

On the other hand, if multiple rows of holes are always present on the slit-like suction port 16a of the suction duct 16, there is a possibility that the flying-supplied fibers become a plurality of fiber bundles and are adsorbed onto the heating body.
Therefore, it is not desirable that multiple rows of holes always exist on the slit-like suction port 16a.

From this point of view, the pitch P is determined in relation to the width of the slit-like suction port 16a, so that one or two rows of holes are always present on the suction port 16a, but multiple rows of holes are always present on the suction port 16a. The arrangement should be such that there is never a time when there are no holes.

Length L of the bulging portion 31: The length of the bulging portion 31 is determined by forming the bulging portion 31 into a gently curved surface so as not to prevent the fiber bundle 34 from rolling on the bulging portion 31. It is limited by the need to form it by

However, the back side of the bulge 31 becomes a flow path for the air sucked by the suction duct 16, and therefore, when the length L of the bulge increases, a part of it becomes the slit-shaped suction port 16.
When it protrudes from a, unnecessary air will be sucked in.

Therefore, in order to make air suction effective, it is desirable to make it as small as possible within the above-mentioned limits.

Distance D between adjacent bulges: It is preferable to make it as small as possible to ensure adsorption of the fiber bundle 34, but this may reduce the mechanical strength, so it should be made as small as possible in terms of strength. is desirable.

In the adsorption heating device having the above configuration, when the fibers flown in the fiber splitting device are supplied onto the heating body 15 through the orientation duct 14, the holes 33 on the heating body 15 are aligned on the side opposite to the running direction. As shown in FIG. 7, the fiber bundle 34 is attracted to the hole 33, and from the time the fiber bundle 34 is deposited on the heating element 15, it is the same as in the case shown in FIG. When the hole 33 passes over the slit-shaped suction port 16a and the suction force weakens, it is attracted by the suction force to the next row of holes 33 and rolls to the state shown in FIG.
That is, since the relatively difficult rolling motion from the state shown in Figure 2a to the state shown in Figure 2 is eliminated, heating is performed extremely smoothly, and as a result, heating efficiency is improved and the spinning speed can be increased. can.

In addition, when multiple rows of holes are provided as shown in Fig. 5,
Although it is conceivable that the fiber bundles 34 adsorbed by one row of holes move all at once to the position of the next row of holes, in reality, the row of holes is inclined with respect to the slit-like suction port 16a. Therefore, each part of the fiber bundle sequentially moves to the next row of holes (
(See FIG. 8), therefore, the fiber bundle is stably adsorbed and held on the heating element 15.

. In addition, although the case where the heating body is drum-shaped has been described above, the heating body is formed into a belt shape having similar holes, and is stretched between a pair of drums.
By rotating the drum, it can also be made to run between the slit-shaped orientation nozzle and the suction port.

Next, the results of experiments using the present invention and conventional adsorption heating devices will be explained.

Using a device as shown in Figures 3 to 7, the short fibers separated from the sliver by the fiber splitting device are flown, and the short fibers are adsorbed and held on a heating element to form threads. Short fibers (polyester, M length 28 mm, 2
Yarn was spun from a sliver of denier.

Above the heating element is a stainless steel plate with a thickness of 0.15 mm, H = 0.8 vtm, W = 2 mm, P = 4.
mm, L=1.5 mm, D=4 im, and an opening ratio of 40% was used.

In addition, stainless steel 200 is used as a drum-shaped heating body as shown in FIGS.
#, using a wire mesh with an opening ratio of 50, the same yarn as above was spun.

The experimental results are shown in Table 1.

As can be seen from Table 1, according to the adsorption heating device of the present invention, the heating efficiency is significantly improved and the maximum speed of the heating element at which yarn can be spun is significantly increased, so that extremely efficient heating can be performed. I can do it.

[Brief explanation of the drawing]

Figures 1 and 2 a''-c are explanatory diagrams of the adsorption heating operation by a conventional device; Figures 3 and 4 are longitudinal cross-sectional views and plan views showing an overview of the adsorption heating device of the present invention; Fifth
7 to 7 are a developed plan view, a sectional view, and a partially enlarged sectional view showing a part of the heating body in the adsorption heating device of the present invention, and FIG. 8 is an explanation of the adsorption state of the fiber bundle to the heating body. It is a diagram. 15... Heating body, 16... Suction duct, 16a... Slit-shaped suction port, 33...
... Hole, 34 ... Adsorption fiber bundle.

Claims (1)

[Claims] 1. In a device that splits and flies the supplied fibers, orients them in a certain direction on a heating body that runs on a slit-like suction port of a suction duct, adsorbs and collects them, and heats them by running the heating body. The heating element is equipped with a large number of holes that open toward the opposite side of the running direction on its surface, and the unevenness of the heating element surface that is generated to form the holes causes the heating element to open on the surface in the opposite direction to the running direction. An adsorption heating device characterized in that it is constituted by a porous body formed by a gently curved surface that does not impede the transfer of adsorbed fiber bundles that roll sideways.