JP3129527B2 - Injection head for web confounding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to entangle fibers such as webs by injecting high-pressure water.
That relates to an improvement of the injection head.

[0002]

2. Description of the Related Art Methods and apparatuses for entanglement of constituent fibers by injecting high-pressure jet water onto the surface of a web or the like, which is an aggregate of fibers, have already been developed.
No. 182460, JP-A-64-52858 and JP-A-2-41452.

[0003] To explain these conventional techniques, a web is placed and moved on a net conveyor, and a high-pressure jet water is jetted from a jet head disposed above the net conveyor toward the web surface, and at the same time. The injected water is sucked together with air by a suction box disposed below the net conveyor, and discharged out of the machine.

[0004] According to such a conventional fiber entanglement method using high-pressure jet water, the jet water is reflected directly on the web on the net conveyor or penetrates the web, hits the net or the suction box, and is reflected on the web. The fibers constituting the web are three-dimensionally entangled by the collision. On the other hand, if water droplets are present around the web where the entanglement is performed, the force of the jet water is attenuated by the water droplets, and the movement of the fibers is inhibited, so that sufficient entanglement is not performed. Therefore, as described above, a suction box is provided below the web to positively suck the entangled jet water, and simultaneously suck water and air that are in the way of obstruction, so that the area around the web where the jet water acts It has been done to eliminate as much extra water as possible from the part.

[0005]

However, in the above-mentioned prior art, only suction is performed with a suction box, and there is no guarantee that excess water is reliably eliminated, and sufficient entanglement is caused by water remaining around the web. Was making it difficult. On the other hand, in order to reliably remove excess water using the above-described conventional technology, it is necessary to increase the water pressure for jetting high-pressure water, increase the number of nozzles, or reduce the suction pressure of the suction box. However, there is a limit to such measures, and in this case, there is a problem that the apparatus becomes large and expensive.

[0006] The present invention has been developed to solve such a problem, and its object is not to increase the size of the apparatus.
Moreover, it is an object of the present invention to provide a high-pressure jet water jet head for web entanglement , which can reliably remove excess water remaining around the web.

[0007]

Means for Solving the Problems The present <br/> onset bright order to achieve the above object, to inject high-pressure water on the surface of such web
Injection head used to entangle the constituent fibers
And extends below the injection nozzle and the injection nozzle
A head body having an injection port, and a periphery of the head body.
The enclosure has an airtight chamber connected to an external exhaust source.
Both, around the injection port below the injection nozzle and the airtight
A web characterized in that the rooms communicate with each other through an intake passage.
The main configuration is a confounding ejection head .

[0008]

[0009]

The web is placed on a net conveyor and moves in one direction. At this time, the high-pressure water introduced from the high-pressure water inlet of the injection head is jetted downward from the nozzle hole as a jet. The jet directly hits the web, or penetrates the web and hits the net conveyer or a suction box provided thereunder, hits the web while rebounding, and causes the fibers of the web to be three-dimensionally entangled.

At this time, irrespective of the suction of water and air by the lower suction box, mist-like water droplets are generated around the nozzle hole of the injection port extending just below the nozzle hole, and the jet flows on the web. Water droplets will be present in the vicinity of the action. In general, the atomized water droplets directly attenuate the force of the jet, and similarly, the water droplets in the vicinity of the working part of the jet attenuate the force of the jet hitting the web and penetrate around the fibers constituting the web. The increased resistance when moving the fibers makes it difficult to sufficiently entangle the fibers.

When the exhaust blower is operated, the mist-like water droplets and the water droplets near the working part of the jet are positively sucked together with the air through the intake passage and discharged outside the machine. Therefore, the momentum of the jet is not reduced by the water droplets, and acts on the fiber with the original entanglement function, thereby sufficiently performing the entanglement.

[0012]

EXAMPLES hereinafter be described in detail an example of the ejection head of the present invention of the present invention with reference to accompanying drawings.

FIG. 1 is a vertical sectional view in the web moving direction showing a typical example of the structure of a jet head according to the present invention, and FIG. 2 is a view taken along the line AA in FIG. In FIG.
Denotes an ejection head, and the ejection head 1 has a nozzle case 2, a nozzle plate 3, a holding plate 6, and a suction chamber 10 as main constituent members.

The nozzle case 2 is made of a thick wall material capable of withstanding high pressure that is long in the width direction of the net conveyor N, has a rectangular parallelepiped cavity 2a therein, and has a hollow 2a.
A filter 8 is interposed in the middle part in the vertical direction.
A high-pressure water inlet 7 is formed at the upper end opening surface of the nozzle case 2 via a seal ring, and the nozzle plate 3 is also formed at the lower end opening of the nozzle case 2 via a seal ring 4. It is sandwiched and supported by the holding plate 6.

The nozzle plate 3 is made of a rectangular plate material that is slightly larger than the shape of the lower end opening of the nozzle case 2.
At the center in the width direction of the plate material, a number of nozzle holes 3a are formed at a predetermined pitch in the longitudinal direction.

The holding plate 6 has a slit-shaped injection port 6a extending toward the lower end at a portion facing the arrangement of the nozzle holes 3a, and is horizontally mounted on the lower surface of the nozzle case 2 by bolts 5. The nozzle plate 3 is attached and fixed, and sandwiches and supports the nozzle plate 3 from below with the nozzle case 2 as described above.

The nozzle case 2 and the holding plate 6 are formed with an intake passage 9 which forms a part of the characteristic portion of the present invention. As shown in FIG. 2, a large number of the intake passages 9 are formed symmetrically in front of and behind the nozzle case 2 with the injection port 6a interposed therebetween and at a predetermined pitch in the length direction of the case 2. 1 and 2, the intake passage 9 is formed so as to communicate with the lower part of the nozzle case 2 and the holding plate 6, and the inlets 9a and 9b are provided at two places around the upper end and the lower end of the injection port 6a. The outlet 9c is the outer surface of the lower end of the nozzle case 2. According to the illustrated embodiment,
The inlet 9a is opened near the nozzle hole 3a,
Aspirates and removes water droplets that occur in the form of a mist just below the nozzle.
The latter inlet 9b is open around the lower end outlet of the injection port 6a.

The suction chamber 10 corresponds to the hermetic chamber of the present invention, and is located before and after the nozzle case 2 (FIG. 1).
Are formed in an airtight state by surrounding walls 10a provided at predetermined intervals between the left and right (in the left-right direction) and the left and right (in the direction orthogonal to the paper surface of FIG. 1) wall surfaces. Therefore, the upper end of the surrounding wall 10a is fixed to the side surface of the upper end portion of the nozzle case 2 by the bolt 11a, and the lower end is fixed to the side surface of the holding plate 6 by the same bolt 11b. Further, an intake port 10b is formed in a part of the surrounding wall 10a, and the intake port 10b is connected to an exhaust blower 12 outside the machine, and actively sucks air and moisture in the suction chamber 10. It is designed to be discharged outside.

Since the outlet 9c of the intake passage 9 is open to the suction chamber 10, water droplets generated around the injection port 6a pass through the intake passage 9 together with the air, pass through the suction chamber 10, and become outside the machine. Is actively removed by the exhaust blower 12.

Next, a description will be given of the fiber entanglement action of the web or the like when the jet head 1 of the illustrated embodiment is used. The web W is placed on the net conveyor N under the jet head 1 in the front-rear direction (FIG. 1 left and right directions). At this time, the high-pressure water introduced from the high-pressure water inlet 7 of the injection head 1 is jetted downward from the nozzle hole 3a as a jet J. The jet J directly hits the web W, or penetrates the web W and hits the net conveyor N or a suction box (not shown) installed further below the web W to bounce off and hit the web W to three-dimensionally. Entangled.

At this time, irrespective of the suction of water and air by the lower suction box, mist-like water droplets M are generated around the nozzle hole of the injection port 6a extending immediately below the nozzle hole 3a. Waterdrop S near where J hits web W
Exists. Generally, the atomized water droplet M attenuates the momentum of the jet J. Similarly, the water droplet S attenuates the momentum of the jet J and penetrates around the fibers of the web W, and the jet J
This increases the resistance when moving the fibers, making it difficult to entangle the fibers.

In the present invention, when the exhaust blower 12 is operated, these mist-like water droplets M and water jets S near the jets J hitting the web W are actively sucked together with air from the intake passage 9 and discharged outside the machine. Is done. That is, the atmosphere that inhibits the entanglement of the fibers around the jet J is injected is removed to the outside via the airtight chamber 10 and acts on the fibers without reducing the momentum of the jet J, so that the entanglement is sufficiently performed. It is.

In the illustrated example, since the airtight chambers 10 are provided directly before and after the nozzle box 2, when a large number of nozzle cases 2 are arranged before and after in the web moving direction, the space between them becomes small, and confounding occurs. The size of the entire device can be reduced.

In the above-described embodiment, the inlet of one intake passage is formed at two places near the upper end and the lower end of the injection port. However, the present invention is not limited to these two places. Any shape may be used as long as the surrounding water droplets are generated, and the number of the formed water droplets need not be two. Further, the structure of the ejection head is not limited to the illustrated embodiment but may be various without departing from the spirit of the present invention. Can be changed.

[0025]

Effects of the Invention According to the head morphism injection of the present invention, since so as to positively exclude the atmosphere is obstacles to entanglement around confounding effect is performed, confounding by high-pressure injection water is inhibited by the water drop And efficient confounding is performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an ejection head showing a typical embodiment of the present invention.

FIG. 2 is a view of the head taken along the line AA in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Injection head 2 Nozzle case 3 Nozzle plate 3a Nozzle hole 4 Seal ring 5, 11a, 11b Bolt 6 Holding plate 6a Injection port 7 High-pressure water inlet 8 Filter 9 Intake passage 9a, 9b Inlet 9c Outlet 10 Intake chamber (airtight chamber) 12 Exhaust blower W Web N Net conveyor J Jet M (Mist-like) water drop S (Near the jet action part)

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Denzo Hori 20-1 Miyukicho, Otake City, Hiroshima Prefecture Mitsubishi Rayon Engineering Co., Ltd. Otake Works (56) References JP-A-4-34057 (JP, A (58) Field surveyed (Int. Cl. ⁷ , DB name) D04H 1/00-18/00

Claims (1)

(57) [Claims] A high pressure water is sprayed on a surface of a web or the like.
To the jet used to entangle the constituent fibers
And extending below the injection nozzle and the injection nozzle.
Comprising a head body having an existing ejection port.
An airtight chamber connected to an external exhaust source is formed around the body
And around the injection port below the injection nozzle.
The airtight chamber is communicated with an intake passage.
Injection head for web entanglement.