JPH09302564A - Apparatus for removing fly waste in punching process in production of nonwoven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for efficiently removing fly waste in a nonwoven fabric producing machine of a needle-punch type. SOLUTION: This apparatus is equipped with a stripper plate 21 having bored needle insertion holes 21a of the same arrangement as that of needles 9a on the top of a needle board 9 planted with the needles under a web W, a bed plate 22 having bored needle insertion holes 22a of the same arrangement at the upper side and a box shaped body 23 having a hermetically built-in filter 26 at the back of the bed plate. The box shaped body 23 is connected through a duct 24 to an exhauster 25. Fly waste occurring in punching is ridden on the flow of air sucked by the exhauster, drawn in the needle insertion holes and stuck to the filter. The filter is removed and cleaned outside the machine. The fly waste can be efficiently removed by small power.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cotton wool removing apparatus for a machine for producing a nonwoven fabric by piercing fibers with a needle board in which a large number of needles are implanted in a web in which fibers are arranged in a layered manner and wide.

[0002]

2. Description of the Related Art An example of a nonwoven fabric manufacturing machine will be described with reference to FIG. The left side of the frame 1 is formed in the first punching zone a, and the right side is formed in the second punching zone b. The upper crankshaft 2 of the first zone is above the frame 1 and the lower crankshaft 3 of the second zone is the frame. 1 are provided on the lower side and in parallel with each other. A web W is fed from the left side to the right side of the frame 1 substantially in the center thereof. A web conveyor 4 for feeding the web material is provided on the left side of the frame 1, and delivery rollers 5A, 5B for pulling out the web are provided on the right side. .

First, piercing the web W with the needle 6a from the upper side
The upper projecting needle board 6 of the punching zone is fixed downward to the lower end of a needle beam 7 that can move vertically along a guide (not shown), and the needle beam 7 is connected to the upper projecting crankshaft 2 via a connecting rod 8. Has been done. Further, the lower protruding needle board 9 of the second punching zone for piercing the web W with the needle 9a from below is fixed upward to the upper end of the vertically movable needle beam 11, and the needle beam 11 is connected via the connecting rod 12. The lower crankshaft 3 is connected. The upper impact crankshaft 2 is driven by a drive motor 13 via a synchro belt 14, and the lower impact crankshaft 3 is driven by a drive motor 15 via a synchro belt 16.

In the process of needle-punching the web with the machine having such a structure, the fly cotton generated from the raw fabric gradually passes through the needle insertion hole of the bed plate to the back side of the bed plate by the wind generated by the vertical movement of the needle beam. accumulate. Then, the fly cotton accumulated on the back side is shaken by the vertical movement of the needle beam, and is scattered by the generated wind, and a part of it falls on the original fabric. For this reason, unevenness and stains are produced on the produced non-woven fabric, which is a cause of product defects.
As a countermeasure for this, the duct 17 installed inside the machine
A large number of openings 17a are provided in the air duct, and an exhaust device 18 having the duct 17 provided outside is used to discharge and collect the cotton wool together with the air inside the machine.

[0005]

With the prior art, it is possible to remove the cotton fly near the suction port, but it is difficult to remove the cotton fly in the portion away from the suction port.
In addition, a large number of suction ports were required to remove all the cotton wool generated from the raw fabric. It was difficult to remove the dust that had once scattered because it accumulated in the pore angle of the suction air. The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a device for efficiently removing a cotton fly generated in a needle punching process with a discharging device having a small capacity. It is the one we are trying to provide.

[0006]

In order to achieve the above-mentioned object, the present invention is directed to a needle board having a large number of needles implanted therein, each of which is provided with an insertion needle hole and is opposed at a distance. In the non-woven fabric manufacturing machine for continuously passing the web between the stripper plate on the needle board side and the bed plate and binding the fibers of the web with each other by punching with the needle board, a box-shaped body covering the back side of the bed plate is formed. The box-shaped body is airtightly provided, and the box-shaped body is connected to an exhaust means. The cotton wool generated by punching is sucked by using the needle insertion hole of the bed plate as a suction port.

The cotton wool generated by the needle punching is sucked together with air from the needle insertion hole of the bed plate by the exhaust device, is collected in the box-shaped body provided on the back surface of the bed plate without being scattered to the outside, and is discharged to the outside. It
Further, by providing the filter, the filter can be removed in a lump by removing and cleaning the filter in which the filter has accumulated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. Since the mechanical configuration of FIG. 1 is the same as that of FIG. 5 of the conventional art, the same reference numerals are given and the description thereof is omitted. FIG. 2 is an enlarged detailed view of the needle punching portion of the second punching zone b. The needle punching portion of the first punching zone a has the same configuration by reversing the vertical direction, so that the second punching zone is the same. It will be described with reference to FIG.

A plurality of needles 9 are provided under the web W to be fed.
A stripper plate 21 is provided on the front surface of the needle board 9 in which a is planted so as to receive the web W. The stripper plate 21 is provided with needle insertion holes 21a which are arranged in the same arrangement as the arrangement of a large number of needles 9a. Web W
A bed plate 22 is provided on the upper side of the plate W so as to be sandwiched at an interval substantially equal to the thickness of the web W. The bed plate 22 is also provided with needle insertion holes 22a in the same arrangement as the arrangement of the needles 9a of the needle board 9.

A box-like body 23 is airtightly attached to the back side of the bed plate 22 so as to cover the entire needle insertion hole 22a. The box-shaped body 23 is connected via a duct 24 to an exhaust device 25 provided outside the machine. Further, inside the box-shaped body 23, as shown in FIG. 4, filters 26 are provided facing the entire surface of the needle insertion hole 22a at regular intervals. Further, the side surface of the box-shaped body 23 is a door 23a that can be opened and closed up and down, and by opening the door 23a, the filter 26 inside can be taken out without dropping the cotton wool.

The operation of the present invention having such a configuration will be described. The web fed into the first punching zone a by the web conveyor 4 is punched downward from the upper side, is drawn by the delivery rollers 5A and 5B and moves to the second punching zone b, and the web is punched from the lower side to the product. Sent from the delivery roller. In the second punching zone in FIG. 3 showing this punching state, the needle 9a of the needle board 9 is the stripper plate 21.
The needle tip is inserted into the needle insertion hole 22a of the bed plate 22 through the web W by hooking the fiber with the barbs provided on the needle through the needle insertion hole 21a.

The fibers of the web are entangled by this punching to form a cloth, and the cotton wool Wa generated by cutting the fibers at this time is discharged from the needle insertion hole 22a by the operation of the exhaust device 25 being driven. The flow of the sucked air is carried and is carried to the back surface of the bed plate 22 through the needle insertion hole 22a of the bed plate 22 together with the surrounding air.

Since a filter 26 having air permeability is attached to the entire back surface of the bed plate 22 with a constant gap, the cotton wool Wa carried along with the air flow adheres to the filter 26. The filter 26 is periodically taken out of the machine by opening the lid 23a on the side surface of the box-shaped body 23, removes the cotton wool Wa adhering to the filter 26, and is stored in the box-shaped body again. If the filter 26 is not provided, it is directly sent to the exhaust device 25 and is collected here.

[0014]

Since the present invention is configured as described above, it has the following effects. The cotton wool is sucked together with air by using the needle insertion hole formed in the bed plate for needle punching as a suction port. Since the cotton dust can be sucked near the place where the cotton dust is generated, the cotton dust is not scattered and the efficiency of sucking cotton dust is extremely good. In addition, a small size of the exhaust device is sufficient for sucking air from the small volume inside the box-shaped body and the needle insertion hole. In addition, placing the filter on the backside of the bedplate may reduce the build-up of cotton wool on the backside of the bedplate.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view of a main part of a nonwoven fabric manufacturing machine of the present invention.

FIG. 2 is an enlarged explanatory view of a needle punching portion of FIG.

FIG. 3 is a diagram showing the flow of air during punching.

FIG. 4 is a view showing a box-shaped filter taken out.

FIG. 5 is an explanatory cross-sectional view of an essential part of a non-woven fabric manufacturing machine provided with a conventional cotton wool exhaust mechanism.

[Explanation of symbols]

 6,9 Needle board 6a, 9a Needle 21 Stripper plate 22 Bed plate 21a, 22a Needle insertion hole 23 Box-like body 24 Duct 25 Exhaust device

Claims (2)

[Claims] 1. A stripper plate and a bed plate on the needle board side, which are arranged so as to oppose a needle board in which a large number of needles are implanted, are provided with needle insertion holes, respectively, and which are opposed to each other with a space therebetween, and are continuous. In a non-woven fabric manufacturing machine in which the fibers of the web are entangled with each other by passing through the web and punching with a needle board, a box-shaped body that covers the back side of the bed plate is provided in an airtight manner, and the box-shaped body is connected to exhaust means. A device for removing cotton wool in a punching process in the manufacture of a non-woven fabric, which sucks cotton wool generated by punching using a needle insertion hole of a bed plate as a suction port. 2. The cotton wool removing device in the punching step in the nonwoven fabric manufacturing according to claim 1, wherein a filter is provided on the back surface of the bed plate so as to be taken out in a box-shaped body.