JPH05295646A - Apparatus for producing random web - Google Patents

Abstract

PURPOSE:To form a random web having a uniform density by three- dimensionally stirring fiber in a fiber transfer passage among each of a main cylinder and both top and bottom cylinders through a suction air stream from a suction duct arranged in a space among the cylinders. CONSTITUTION:In a carding engine, fiber passed through a licker-in, a breast cylinder and breast worker and subjected to carding action is transferred to a main cylinder (MS), and a suction air stream from a suction duct 4 installed in a sealing plate 3 for closing a space formed by the main cylinder (MS) and both a top and bottom cylinders (RS1) and (RS2) adjacently arranged so as to respectively have nipping points is regulated with casings 11, 12, 13, 14 and 15. The fiber is then three-dimensionally stirred in a fiber transfer passage among the main cylinder (MS) and both the top and bottom cylinders (RS1) and (RS2) and passed through both a top and a bottom doffers (D1) and (D2) to form the objective random web.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a random web in which fibers used in a nonwoven fabric or the like have random directions.

[0002]

2. Description of the Related Art A carding machine (roller card) shown in FIG. 3 is known as a conventional random web manufacturing apparatus. In this figure, the fiber material M is carried by the supply roll F, and the fibers are unraveled by the opening roller T and supplied to the first cylinder S ₁ . The first cylinder S ₁ and the fourth cylinder S
_{The fourth} and seventh cylinders S ₇ are linearly arranged at a predetermined interval,
Second and fifth cylinders S ₂ and S ₅ and third and sixth cylinders S ₃ and S ₆ are provided between these and above and below, respectively, and are arranged in a bales stack as a whole.

The first to seventh cylinders S _{1 to} S ₇ rotate in the same direction at high speed, and a large number of needles S _{1a to} S _7a curved in the rotation direction are formed on the peripheral surface thereof.

The _first to seventh cylinders S ₁ to
A fiber guide plate P is provided along the cylinder at the outer periphery of S ₇ around which the fiber material M is wound.

Accordingly, the first cylinder S ₁ wound fibrous material M attached together with the blown air current h generated by high speed rotation of the first cylinder S _1, the first cylinder S ₁ and the second cylinder S ₂ Needles S _1a and S _2a facing each other
As a result, approximately half of the fiber material M is transferred to the second cylinder S ₂ , and the remaining approximately half is similarly transferred to the third cylinder S ₃ . Similarly, the fiber material wound around the third cylinder S ₃ and the second cylinder S ₂ moves to the fourth cylinder S ₄ . This process is repeated in the fifth, sixth and seventh cylinders S ₅ , S ₆ and S ₇ , the fiber material becomes substantially random, and accumulated on the doffer drums D ₁ and D ₂ rotating at a slow speed to form the web WB. It is discharged from between the discharge rollers R and R.

As another random web manufacturing apparatus, a carding machine as shown in FIG. 4 is known. In this figure, the supply roller F delivers the fiber material M to the first cylinder S ₁ with slow rotation.

[0007] fiber material M wound around the first cylinder S ₁ and carding the fibers protruding through the first stripper roller ST ₁ and the first and the worker roller W ₁ which are arranged in the first cylinder S ₁ above And again shifts to the first cylinder S ₁ .

[0008] The first second to fourth cylinders S ₂ to S ₄ in proximity to the cylinder S ₁ is arranged in series, respectively in the same manner as described above for these second to fourth cylinders S ₂ to S ₄ upper Second
~ Fourth stripper roller ST ₂ ~ST ₄ and second to fourth worker roller W ₂ to _W-4 is disposed.

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

Then, the fiber material M wound around the first cylinder S ₁ moves while being carded into the second cylinder S ₂ . A part of the fiber material M that is transferred is sucked by the air suction device D and is sucked onto the upper surface of the punching conveyor C.

Similarly, each air suction device D provided below each nip point K of the _{second to} fourth cylinders S _{2 to} S ₄ gradually adsorbs it on the upper surface of the punching conveyor C, and the last remaining fiber material is the fourth. Cylinder S ₄ and 4th stripper roller ST ₄
After being carded by the fourth worker roller W ₄ , it is sucked by the air suction device D and laminated on the upper surface of the punching conveyor C.

[0012]

However, in the former conventional example, that is, to blow the fiber material by the air flow accompanying the delivery of the fiber material by the needle and the needle of the metal clothing cloth provided in the two cylinders and the high speed rotation of the cylinder. In the carding machine that uses the delivery of the fiber material by the method described above, the density of the produced web is uniform and the quality is improved, but turbulent flow occurs due to the twist of the air flow near the nip point between the cylinders. By using this method a lot, ultrafine fibers and the like have a problem that fluff balls made of fibers are entangled.

In the latter other conventional example, that is, in the carding machine in which the fiber material is stacked on the upper surface of the mesh-like punching conveyor C by the air suction device, the direction of the fibers is substantially random, but the air suction is performed. possible to equalize the first to suction force in the axial direction of the fourth cylinder S ₁ to S ₄ of the device D has a problem that causes a decrease in quality for difficult.

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

[0015]

The structure of the present invention for achieving the above object is achieved by arranging a main cylinder and two random cylinders close to each other so as to have a nip point in a carding machine. It is characterized in that a side surface of a substantially triangular space is closed by a seal plate, a suction duct is provided in the seal plate, and a casing is provided at an arbitrary portion on the outer periphery of each cylinder for adjusting the flow rate of the air flow. ..

[0016]

Function: The fibers held in the main cylinder are decomposed into a uniform density and individual fibers in the preceding process. Since the main cylinder rotates at high speed, an air flow is generated between the main cylinder and the top random cylinder casing.
The fibers held on the metal cloth of the main cylinder are affected by the high-speed air flow due to the suction from the closed space formed by the main cylinder, the top random cylinder, and the bottom random cylinder. About 50% transfer to the top random cylinder while scattering from the vicinity of the nip point.

In the closed space, about 50% is transferred from the main cylinder to the bottom random cylinder without being affected by the air flow, and half of the fiber amount held in the bottom random cylinder to the top random cylinder is closed in the closed space. (Transferring from the amount of fibers transferred from the main cylinder, 50/100 × 50 = 25, 25%).

The amount of fibers held in the top random cylinder becomes 75%, and about 50% of the amount is transferred to the top doffer. Then, the intake air of the top random cylinder casing 2 is adjusted, and a high-speed airflow is generated by suction from the closed space in the vicinity of the nip point between the top random cylinder and the bottom random cylinder. .. At this time, the fiber holding amount of the bottom random cylinder is 50%.

The fibers held in the bottom random cylinder are guided to the bottom random cylinder casing, and the rest of the fibers are transferred to the bottom doffer. The bottom random cylinder casing 2 and the main cylinder bottom casing are used for air intake control.

From the fiber transfer paths of the main cylinder and the top and bottom random cylinders, the fibers are three-dimensionally agitated and formed into a web shape by the top and bottom doffers, and the density becomes uniform and the fibers are sufficiently dispersed. Become random.

[0021]

EXAMPLES Examples of the present invention will be described below with the roller card (carding machine) shown in FIG. As shown in the drawing, a main cylinder MS is rotatably supported in a substantially central portion of the machine casing 1 so as to be rotatable in a clockwise direction, and a plurality of workers W _{1 to} W ₅ are provided near the predetermined positions on the periphery of the main cylinder MS. It is arranged so that it can rotate counterclockwise.

A transporter T, which rotates clockwise, is arranged close to the main cylinder MS, and two point workers PW ₁ and PW ₂ which rotate counterclockwise are arranged close to the transporter T, Point worker P
W ₁ and PW ₂ are breast cylinders BS that rotate clockwise
Is located close to.

The breast cylinder BS has a breast worker BW and a breast stripper BST which rotate counterclockwise.
Are arranged close to each other, and the licker in Ri that rotates counterclockwise is also arranged close to each other. The breast worker BW and the breast stripper BST are arranged close to each other.

A feed roller F, which rotates counterclockwise, is arranged close to the licker in Ri. The feed roller F is a roller for delivering the fiber material M to the licker in Ri.

On the other hand, a top random cylinder RS ₁ and a bottom random cylinder RS ₂ which rotate clockwise in the vicinity of the main roller MS are provided, and the top random cylinder RS ₁ and the bottom random cylinder RS ₂ are arranged close to each other. Has been done. Accordingly, the space 2 of the configured substantially triangular cross-section with a main roller MS and the top random cylinder RS ₁ and a bottom random cylinder RS ₂
Is formed. Therefore, as shown in FIG. 2, both side surfaces of the space 2 are covered with seal plates 3 and 3 to form a closed space CSC, and a suction duct 4 is connected to the seal plate 3 so that the air in the closed space CSC is closed. Allow suction.

A top doffer D ₁ rotating clockwise is close to the top random cylinder RS ₁ , a capacitor C ₁ rotating counterclockwise is close to the top doffer D _1, and a clock is connected to the capacitor C _1. The condenser C ₂ which rotates in the direction is close to the condenser C ₂ , the redirect RD ₁ which rotates in the clockwise direction is close to the condenser C _2, and the circular brush SB ₁ which rotates counterclockwise and the take-off TO ₁ are close to the redirect RD _1. Are arranged. A delivery conveyor DC ₁ is arranged below the take-off TO ₁ .

[0027] The bottom randomly cylinder RS ₂ close to each Botomudoffa D ₂ which rotates in the counterclockwise direction, the Botomudoffa D ₂ adjacent capacitor C ₃ which rotates clockwise, the capacitor C ₃ is rotated clockwise capacitor C ₄ is close, redirect RD ₂ is close to the capacitor C _4, the redirect RD ₂ proximate the circular brush SB ₂ and take-off tO ₂ which rotates in the counterclockwise direction, is disposed, respectively. A delivery conveyor DC ₂ is arranged below the take-off TO ₂ . Circular brushes SB ₁ and SB ₂ are redirects RD ₁ and R
It is provided to prevent the winding of fibers of D ₂ and take-off TO ₁ and TO ₂ .

The licker in Ri, the breast cylinder BS, the point workers PW ₁ and PW ₂ , the transporter T, the main cylinder MS, the top and bottom random cylinders RS ₁ and RS ₂ , the top and bottom doffers D ₁ and D ₂ , the condenser. C ₁ , C ₂ , C ₃ , C ₄ , redirects RD ₁ , RD ₂ , and take-offs TO ₁ , TO ₂ are cylinders or rollers, respectively, and are main cylinders M.
On each peripheral surface of the S, top and bottom random cylinders RS ₁ and RS ₂ , a metal clothing 5 (see FIG. 2) is stretched so as to project with the needle tip in the rotational direction.

In order to guide the fiber material M and guide the air flow and control the intake air, the licker-in casing 6,
Breast cylinder casings 7, 8, transporter casings 9, 10, main cylinder bottom casing 1
1, top random cylinder casings 12, 13 and bottom random cylinder casings 14, 15 are provided, respectively.

Next, the operation of the above embodiment will be described. In FIG. 1, the fibrous material M is supplied to the licker in Ri by the feed roller F, is lightly stretched, moves to the breast cylinder BS, and is further stretched. The fibers held in the breast cylinder BS are breast workers B
W has a carding effect and is lightly densified.

At this time, the fibers are divided into the breast cylinder BS and the breast worker BW, and the breast stripper BST is provided so as to be in contact with both the breast worker BW and the breast cylinder BS. Therefore, the fibers held in the breast worker BW are It is returned to the breast cylinder BS.

The fibers held in the breast cylinder BS which has been carded by the breast worker BW migrate to the point workers PW ₁ and PW ₂ while being carded, and are peeled off by the transporter T while being stretched at the same time. ..

The fibers transferred to the transporter T are further stretched, transferred to the main cylinder MS, and the five sets of workers W _{1 to} W ₅ arranged on the main cylinder MS.
And the strippers S _{1 to} S ₅ perform carding action and return of fibers to the main cylinder MS. The fibers held in the main cylinder MS immediately before the top random cylinder RS ₁ have a uniform density, and each fiber is decomposed into individual pieces.

Then, the fibers are guided by the top random cylinder casing 1 and carried to the vicinity of the nip point between the main cylinder MS and the top random cylinder RS ₁ .

At this time, the main cylinder MS, the top random cylinder RS _1, and the bottom random cylinder RS ₂ , which rotate at a peripheral speed of about 1000 rpm, are arranged close to each other so that a nipping point is provided therebetween, and the closed space CSC is a suction duct. Since the air is sucked at 4, just before the nip point between the main cylinder MS and the top random cylinder RS ₁ , the fibers are scattered to the top random cylinder RS ₁ by the high-speed airflow generated by suction, and About 50% of the fiber retention is transferred.

Next, in the closed space CSC, the main cylinder MS and the bottom random cylinder R are not affected by the air flow.
The remaining fibers held in the main cylinder MS are transferred to the bottom random cylinder RS ₂ simply by passing the needle of the metal cloth 5 wrapped around the outer circumference of S ₂ and the needle.

The number of fibers transferred to the bottom random cylinder RS ₂ is about 50% of the total amount of fibers held in the main cylinder MS, that is, 50/10.
When 0 × 50 = 25, about 25% moves to the top random cylinder RS ₁ .

At this point, the top random cylinder RS
_The fiber holding amount of 1 is about 75% at 50 + 25 = 75 until just before the nip point with the top doffer D _1, and the fiber holding amount of the bottom random cylinder RS ₂ temporarily becomes 25%.

The fibers held in the random cylinder RS ₁ are, considering the total holding amount of the main cylinder MS,
About 50% of the fibers migrate to the top doffer D _1, and about 25% of the remaining fibers formed in the web state are air in the closed space CSC near the nip point between the top random cylinder RS ₁ and the bottom random cylinder RS _2. Riding on the high-speed airflow generated by the influence of the suction, the particles are all transferred to the bottom random cylinder RS ₂ .

At this point, the bottom random cylinder RS ₂
Considering the total fiber holding amount of the main cylinder MS, the fiber holding amount is about 50% at 25 + 25 = 50. Then, all of them move to the bottom doffer D ₂ and are formed into a web shape. The fibers held in the web state on the top and bottom doffers D ₁ and D ₂ rotating at about 150 to 200 revolutions per minute at the peripheral speed are subjected to an accumulation action by capacitors C ₁ and C ₂ and C ₃ and C ₄ , respectively. And redirects RD ₁ and RD ₂
It is peeled off by the take-off TO ₁ and TO ₂ and dropped onto the delivery conveyors DC ₁ and DC ₂ and spun.

[0041]

As can be seen from the above description, according to the random fiber producing apparatus of the present invention, the direction of the fibers of the produced web is almost completely random, and the density can be made uniform. is there.

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

[Brief description of drawings]

FIG. 1 is a side view showing a configuration example of an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a side view of a conventional example.

FIG. 4 is a side view of another conventional example.

[Explanation of symbols]

MS ... Main cylinder RS ₁ , RS ₂ ... Random cylinder 1 ... Machine frame 2 ... Space 3 ... Seal plate 4 ... Suction duct 5 ... Metal clothing 11,12,13,14,15 ... Casing

Claims (1)

[Claims] 1. In a carding machine, a main cylinder and two random cylinders are arranged close to each other so as to have a nip point, and a side surface of a substantially triangular space formed thereby is closed by a seal plate, and the seal plate is formed. An apparatus for manufacturing a random web, which is provided with a suction duct and a casing at an arbitrary portion on the outer circumference of each cylinder for adjusting the flow rate of the air flow.