JPH0753928B2 - Random web manufacturing equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for producing a random web in which fibers used in a non-woven fabric or the like have random directions.

SUMMARY OF THE INVENTION The present invention provides a random web manufacturing apparatus in which at least three cylinders are arranged close to each other, and at these nip points, the fiber material wound on one cylinder is transferred to the other cylinder. By providing a fiber guide plate along the outer periphery and moving the fiber material to the nip point of two of the three cylinders from one cylinder to the other cylinder by the high-speed airflow generating means, the directionality of the fibers of the web To make the strengths of the web in the longitudinal and transverse directions equal and to make the density of the fibers uniform.

[Prior Art] As a conventional random web manufacturing apparatus, one shown in FIG. 5 is known.

In this figure, the fiber material 2 is conveyed by a supply roll F, and the fibers are unraveled by an opening roller T and supplied to the first cylinder S ₁ . The first cylinder S ₁ , the fourth cylinder S _4, and the seventh cylinder S ₇ are linearly arranged at a predetermined interval, and between them, the second and fifth cylinders S ₂ , S are located above and below, respectively.
₅ and 3rd and 6th cylinders S ₃ and S ₆ are provided, and they are arranged in a bales stack as a whole.

These first to seventh cylinder S ₁ to S ₇ are together rotated at a high speed in the same direction, a number of needles S _1a to S _7a curved in the rotation direction is formed on its peripheral surface.

Moreover, these first to seventh cylinder S ₁ periphery a a in part of fibrous material 2 is wound in to S ₇ are fiber guide plates 7 and 8 is provided along the cylinder.

Therefore, the fiber material 2 wound around the first cylinder S ₁
Together are blown into the air flow generated by high speed rotation of the first cylinder S _1, the first cylinder S ₁ and the second cylinder
Needle S _1a which face each other in S _2, approximately half of the fiber material 2 by S _2a is migrated to the second cylinder S _2, and the remaining approximately half the process proceeds to the third cylinder S ₃ in the same manner. Similarly, the third cylinder S ₃
And the fiber material wound around the second cylinder S ₂ moves to the fourth cylinder S ₄ . 5th, 6th and 7th cylinders
Repeating with S ₅ , S ₆ and S ₇ , the fiber material becomes substantially random and is accumulated on the doffer drums D ₁ and D ₂ rotating at a slow speed to be a web 14 and discharged from between the discharge rollers 4 and 4.

As another random web manufacturing apparatus, one shown in FIG. 6 is known. In this figure, the supply roller F delivers the fiber material 2 to the first cylinder S ₁ with a slow rotation. Again fibrous material 2 wound around the first cylinder S ₁ by carding the fibers protruding through the first and stripper roller ST ₁ and the first Walker roller ST ₁ which is arranged in the first cylinder S ₁ above the Move to 1 cylinder S ₁ . The second to fourth cylinders S _{2 to} S ₄ are located close to the first cylinder S _1.
There are arranged in series, these second to fourth cylinders S ₂ to S ₄ wherein the upper and the second to fourth stripper roller ST ₂ ~ST ₄ respectively similarly the second to fourth Walker roller W ₂ to W- ₄ are arranged.

A mesh-like punching conveyor 15 is arranged below each of the first to fourth cylinders S _{1 to} S ₄ . Below the punch conveyor 15, below the closest nip point K of the _first to fourth cylinders S _{1 to} S _4, an air suction device 9 is arranged, and above the air suction device 9, an air supply passage 16 is provided. It is configured.

Then, the fiber material 2 wound around the first cylinder S ₁ moves while being carded to the second cylinder S ₂ . A part of the moving fiber material 2 is sucked by the air suction device 9 and sucked onto the upper surface of the punching conveyor 15. Similarly gradually adsorbed on the punching conveyor 15 the upper surface by the air suction device 9 provided at each nip point K below the second to fourth cylinders S ₂ to S _4, the last remaining fiber material fourth cylinder S ₄ And 4th stripper roller ST ₄・ 4th walker roller W ₄
After being carded by, it is sucked by the air suction device 9,
It is stacked on the upper surface of the punching conveyor 15.

[Problems to be Solved by the Invention] However, in the former conventional example, that is, when the fiber material is delivered by a needle provided on two cylinders and a needle and the fiber material is blown off by an air current accompanying high-speed rotation of the cylinder, In a device that uses delivery, the density of the produced web is uniform and the quality is improved, but due to the action of stroking the needle during delivery of the fiber material, the fibers of the web are inevitably oriented. , Can't have a web with completely random fiber orientation. As a result, when a non-woven fabric is manufactured using the web 14, there arises a problem that the strengths in the vertical and horizontal directions are different.

Further, in the other conventional example of the latter, that is, in the one in which the fiber material is laminated on the upper surface of the net-like punching conveyor 15 by the air suction device, the direction of the fibers is substantially random, but the first of the air suction device 9 is used. ~ It is difficult to equalize the suction forces in the axial direction of the fourth cylinders S _{1 to} S ₄ , so that the density becomes uneven in the width direction of the web 14. Therefore, when a nonwoven fabric is manufactured from this web, there is a problem in that the quality is deteriorated due to uneven density.

Therefore, an object of the present invention is to provide a random web manufacturing apparatus that solves the above problems.

[Means for Solving the Problems] The configuration of the present invention for achieving the above object is to provide at least three cylinders that rotate at the same time in the same direction at high speed and that have needles curved in the rotation direction formed on their peripheral surfaces. In a random web manufacturing apparatus in which fiber materials wound around one cylinder in the vicinity of a nip point where these cylinders are closest to each other are transferred to the other cylinder and wound around each other, the fibers are arranged close to each other in a bale-stacked state. A fiber guide plate is provided along the outer circumference of each cylinder around which the material is wound, and two of the three cylinders pass through a nip point passing side in the rotation direction of the one cylinder and rotate the other cylinder. An air suction passage is provided in the vicinity of the nip point of the fiber guide plate on the nip point entry side in the direction,
Air was sucked from this air suction passage, passed through each of the nip points in the same direction as the rotation direction of the one cylinder and in the opposite direction to the rotation direction of the other cylinder, and was held by the one cylinder. A high-speed air flow generating means for generating a high-speed air flow for transferring the fiber material to the other cylinder is provided.

[Operation] When the first cylinder rotates at high speed, an air flow is generated between the first cylinder and the fiber guide plate. The fiber material moving along with the air flow and the fiber material held on the tooth tip of the needle are affected by the high speed air flow generated by the high speed air flow generating means and passing through the nip point, and are blown away by the high speed air flow. By passing the needles of the first and second cylinders, approximately half of the fiber material is transferred to the needles of the second cylinder. At this time, since the two cylinders rotate in the same direction and curve in the same direction, the needle of the first cylinder is not in the fiber hooking direction (hereinafter, the needle working direction) near the nip point, and Since the two cylinders are in the working direction of the needle, the fiber material is carded in a random direction and transferred to the needle of the second cylinder.

Of approximately half the fiber material left in the first cylinder,
The fiber material that moves along with the air flow generated between the fiber guide plate and the fiber material that is held at the tooth tip of the needle are blown off by the high speed air flow that is generated by the high speed air flow generation means and passes through the nip point. It is held by a 3-cylinder needle. Similarly to the above, since the first and third cylinders rotate in the same direction and curve in the same direction, the needle of the first cylinder is not in the needle working direction near the nip point, and the third cylinder is Since it is in the working direction of, the fiber material is transferred to the needle of the third cylinder in a random direction.

Further, the fiber raw material held on the bottom of the needle of the first cylinder also floats on the tooth tip by the high-speed air flow because the needle of the first cylinder is not in the working direction of the needle with respect to the high-speed air flow of the high-speed air flow generation means. , Move to the needle of the third cylinder.

On the other hand, the fibers transferred to the second cylinder also rotate and become fibers in a random direction while being carded at the nip point with the third cylinder by the same principle and transfer to the third cylinder. .

As described above, before the fiber material is transferred from the first cylinder to the third cylinder in a random state, half of the fibers wound around the first cylinder (particularly, fibers having uneven stripes) are temporarily transferred to the first cylinder.・ Second cylinder and second and third cylinders
After being fully carded between the cylinders, it moves to the third cylinder in a random orientation. Then, since half of the fibers remaining in the first cylinder are directly subjected to the action of the high-speed airflow generating means in a random state and merge with the fiber material transferred to the third cylinder, the fiber material is sufficient. The fibers are carded to give a uniform density, and the fiber directions are sufficiently random.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, a random web manufacturing apparatus 1 includes two pairs of supply rollers F _{1 to} F ₄ and an auxiliary roller F ₅ for supplying a fiber material 2.
Is equipped with. Preliminary Hirakiwata roller T is arranged at the feed roller and the predetermined clearance with respect to the auxiliary rollers F ₁ to F _5. The preliminary cotton opening roller T rotates counterclockwise in the figure, and a needle Ta curved in the rotational direction is formed on the peripheral surface thereof. The preliminary Hirakiwata roller T is stretched draw thin fiber material 2 supplied by the supply roller and the auxiliary roller F ₁ to F _5, it is intended to facilitate carding in about after the next. A first cylinder S _{1 having} a large diameter near the preliminary opening roller T
Has been placed. The first cylinder S ₁ rotates in a direction opposite to the preliminary cotton-opening roller T, that is, in a clockwise direction at a high speed, and a needle S _1a curved in the same direction as the rotation direction is formed on the peripheral surface thereof. .

Therefore, the pre-opened fiber material 2 moves to the first cylinder S ₁ and is wound around the first cylinder S ₁ by the transfer action of the needles Ta and S _1a .

A dirt roller D is disposed on the upper surfaces of the preliminary cotton opening roller T and the first cylinder S ₁ in the vicinity thereof. The dirt roller D rotates at a low speed in the direction opposite to the direction of the first cylinder S _1, and a needle Da curved in the opposite side to the direction of rotation is formed around the dirt roller D. This dirt roller D
Receives the protruding portion of the fiber material wound around the first cylinder by the action of its needle Da, receives it, rotates it counterclockwise, and returns it to the preliminary opening roller T to perform the preliminary opening again. After that, the operation moves to the first cylinder S ₁ again.

Third and fifth cylinders having the same size in series with the first cylinder
Seventh cylinder S _3, S _5, S ₇ are are arranged close. Further, above the respective third, fifth and seventh cylinders S ₁ , S ₃ , S ₅ , S ₇ , between the first and third cylinders S ₁ , S ₃ , the third and fifth cylinders. The second, fourth, and sixth cylinders S ₂ , S ₄ , and S ₃ and S ₅ and the fifth and seventh cylinders S ₅ and S ₇ , respectively, which are close to these
S ₆ are arranged at a predetermined interval from each other and are in a two-row bales stacking shape as a whole. These second, fourth and sixth cylinders S ₂ , S
₄ and S ₆ are formed smaller than the first, third, fifth and seventh cylinders S ₁ , S ₃ , S ₅ and S ₇ .

The first is the second to seventh cylinder S ₂ to S ₇ cylinder S ₁
The needles S _1a , S _2a , S _3a , S _4a , S _5a , S _6a , and S _7a are formed on the circumferential surface of the needle while rotating in the same direction as the above. Doffer drum close to the seventh cylinder S ₇
D ₀ is located. This doffer drum D ₀ is the first
The needle D rotates at a low speed in the opposite direction to the cylinder S ₇ , that is, in the counterclockwise direction, and has a curved surface that is curved in the opposite direction to the rotation direction.
_0a is formed. A laminating roller C is arranged adjacent to the doffer drum D _0a . The laminating roller C rotates in a clockwise direction at a lower speed than the doffer drum D ₀ , and the circumferential surface of the laminating roller C has a projecting ridge having a mountain-shaped cross section protruding in the radial direction.
Ca is formed. A peeling roller 3 and a pair of discharge rollers 4, 4 are arranged adjacent to the laminating roller C. A discharge conveyor 5 is provided on the lower surfaces of the pair of discharge rollers 4.

The preliminary Hirakiwata roller T, dirt rollers D, upper fiber guide plate 6 in the first to seventh upper surface of the cylinder S ₁ to S ₇ and Doffadoramu D ₀ corresponding to these shapes are arranged.

Also, the nip points of the first, second, and third cylinders S ₁ , S ₂ , and S ₃
In the space surrounded by K ₁ , K ₂ and K ₀ , the first to third cylinders S ₁
~ Internal fiber guide plate 7 having a substantially triangular cross section along the shape of S ₃
Are arranged.

Similarly, an internal fiber guide plate is also provided in the space surrounded by the nip points K ₁ , K ₂ , K ₀ of the _{third to} fifth cylinders S _{3 to} S ₅ and the _{fifth to} seventh cylinders S _{5 to} S _7. 7 are arranged.

Further, a lower fiber guide plate 8 is provided on the lower surfaces of the pre-opening roller T and the first, third, fifth and seventh cylinders S ₁ , S ₃ , S ₅ , S ₇ along these shapes. There is.

On the lower surface of the lower fiber guide plate 8, the first fiber
Third cylinder S _1, S nip point K ₀ of _3, the third-fifth cylinder S _3, S ₅ of the nip point K ₀ and 5 & 7 cylinder S _{5-S 7} nipping point of the cylinder K ₀ Air suction devices 9 are provided below. The lower fiber guide plate 8 is formed with an air suction passage 10 for guiding air from each nip point K ₀ to the air suction device 9.

Next, the operation of the above embodiment will be described.

In FIGS. 1 and 2, the fibrous raw material 2 wound on the first cylinder S _{1 after} being unwound by the preliminary unrolling roller T and having the protruding portion carded by the dirt roller D is wound on the first cylinder S ₁ It is held by the needle S _1a or is blown off by the air flow generated between the needle S _1a and the upper fiber guide plate 6. About half of the fiber material is the needle S that is curved in the same direction as the first and second cylinders S ₁ and S ₂ rotate in the same direction.
Fibers _1a, due to the provision of the S _2a, passing action between the needle S _1a and the needle _2a, together with the air flow and although albeit indirectly is somewhat carded also receiving the action of the high-speed air stream by the air suction device 9 The cylinder moves to the second cylinder S ₂ in a state where the direction is random to some extent. The fibrous material 2 transferred to the second cylinder S ₂ is again subjected to the nip point K ₂ by the same principle.
At the same time, the fibers are further randomized and transferred to the third cylinder S ₃ .

On the other hand, as shown in FIGS. 1 and 2, wherein the first substantially half fiber material 2 remaining on the cylinder S _1, the air in the first and third cylinder S _1, the nip point K ₀ in S ₃ The high-speed airflow by the suction device 9 blows away the fibers suspended in the airflow between the middle fiber guide plate 7 and the fibers held on the tooth top 11 and the tooth bottom 12 of the needle S _1a . At this time, since the needle S _1a of the first cylinder is not in the working direction and the needle S _3a of the third cylinder is in the working direction, the blown fiber material 13 moves to the needle S _3a of the third cylinder S ₃ , It merges with the fiber material transferred to the third cylinder S ₃ via the second cylinder.

Similarly, the 3-5 cylinder S ₃ to S ₅ and the fifth to seventh cylinder S ₅ to S ₇ even the same process is repeated sufficiently the direction sufficiently fibers with the carding is randomly web 14
Then, the doffer drum D ₀ and the accumulating roller C are formed to have a proper basis weight, separated by the separating roller 3, and discharged by the pair of discharging rollers 4, 4 and the discharging conveyor.

In this way, the protruding fibers are repeatedly carded and blown into the high-speed airflow to produce a random web 14 having a sufficiently uniform density and completely random fiber directions. When a nonwoven fabric is manufactured with such a random web, the density is uniform and the quality is high, and the strengths in the length and width are equal.

FIG. 3 shows a modified example of the first embodiment, which has substantially the same configuration, and a duplicate description thereof will be omitted.
First and second doffer drums D ₀₁ and D _02, which are respectively close to the seventh cylinder S ₇ , are arranged at predetermined intervals. This first
The second doffer drums D ₀₁ and D ₀₂ are respectively provided with the same peeling roller 3, a pair of discharge rollers 4 and 4 and a discharge conveyor 5 as in the above embodiment, and the fibers transferred to the seventh cylinder S ₇ are the first and second fibers. The doffer drums D ₀₁ and D ₀₂ are laminated on each other, and the web 14 is discharged.

Next, a second embodiment of the present invention will be described with reference to FIG.

This embodiment has substantially the same configuration as the above embodiment,
The same components are designated by the same reference numerals, and duplicated description will be omitted.

In FIG. 4, the fiber guide plate 6 is formed between the dirt roller D and the second cylinder S ₂ , and the upper surface of the upper fiber guide plate 6 and the nip point K ₁ between the _first and second cylinders are formed. An air supply passage 16 that communicates is formed. The air supply passage 16 is formed in the vicinity of the nip point K _{1 in} the common tangential direction of the first and second cylinders.

Similarly, the upper fiber guide plate 6 has second and fourth cylinders.
An air supply passage 16 is formed between S ₂ and S ₄ . The lower end of the air supply passage 16 is branched, one, second and third opening into the cylinder S _2, the nip point K ₂ of S _3, a common tangential direction of the second and third cylinder S _2, S ₃ Is located in. The other is the third
Fourth opens into the cylinder S _3, S common tangentially formed nip point K ₁ of _4. Similarly, the fourth and sixth cylinders S ₄ , S
₆ and the same air supply passage 1 on the opposite side of the sixth cylinder S ₆
6 is provided.

According to this embodiment, when air is sucked by the air suction device 9, not only the transfer of fibers by the high-speed airflow between the cylinders at the nip point K ₀ in the vicinity of the air suction device 9 but also the introduction of the air is performed. Due to the air flow ₂ flowing in from the passage, the movement of the fiber raw material 2 in the first and second cylinders S ₁ and S ₂ is performed by being blown away by the transfer action of the needle S _1a and the needle S _2a, and therefore, while being carded. There is an effect that the randomness of the fibers can be obtained.

In the second embodiment, the humidified air may be fed from the air introduction passage 16.

With such a structure, static electricity generated during carding can be prevented, fibers can be prevented from being adsorbed, and the web can be further randomized.

[Effect of the Invention] As can be seen from the above description, according to the random fiber manufacturing apparatus of the present invention, the direction of the fibers of the manufactured web is substantially completely random, and the density can be made uniform. There is.

Therefore, when a nonwoven fabric is manufactured from this web, the strength in the length and width can be made equal, and the quality can be improved.

[Brief description of drawings]

1 and 2 show a first embodiment of the present invention,
FIG. 1 is a side view of a random web manufacturing apparatus, FIG. 2 is a partial side view showing the principle, and FIG. 3 is a side view of a random web manufacturing apparatus showing a modification of the first embodiment. Is the second
The side view of the manufacturing apparatus of the random web which shows an Example, 5th
FIG. 6 is a side view of a random web manufacturing apparatus showing a conventional example, and FIG. 6 is a side view of a random web manufacturing apparatus showing another embodiment. 1 ... Random web manufacturing device, 2 ... Textile material, S ₁ , S
₂ , G ₃ , S ₄ , S ₅ , S ₆ , S ₇ ... Cylinder, S _1a , S _2a , S _3a , S _4a ,
S _5a , S _6a , S _7a …… Needle, 6,7,8 …… Fiber guide plate …… High speed air flow, 9 …… High speed air flow generating means (air suction device), 14…
…web.

Claims (1)

[Claims] 1. A nip in which at least three cylinders, each of which rotates in the same direction at a high speed and which has needles curved in the rotation direction on its peripheral surface, are arranged in a bag-like manner close to each other, and these cylinders are closest to each other. In a manufacturing device of a random web in which the fiber material wound around one cylinder near the point is transferred to the other cylinder and wound, a fiber guide plate is provided along the outer circumference of each cylinder around which the fiber material is wound. , Air in the vicinity of the nip point of the fiber guide plate on the nip point passage side of the two cylinders of the three cylinders in the rotational direction of the one cylinder and on the nip point entry side of the other cylinder in the rotational direction of the other cylinder. A suction passage may be provided, and air may be sucked from the air suction passage so that the nip points are in the same direction as the rotation direction of the one cylinder. Randomly characterized by providing a high-speed airflow generation means for generating a high-speed airflow that passes the fiber material held in the one cylinder to the other cylinder by passing in a direction opposite to the rotation direction of the other cylinder. Web manufacturing equipment.