JP2556752B2 - How to wind a fleece cut on a bobbin - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wrap forming apparatus that uses an air flow to prevent double-winding of the fleece at the beginning of winding the wrap. The present invention relates to a method of winding a cut end on a bobbin.

[Conventional technology]

The wrap forming device is a device that is installed in a sliver wrap machine or a ribbon wrap machine and that winds a belt-shaped fleece around a bobbin to form a wrap.

As shown in FIG. 1, this lap forming device A has
It is composed of a front drum 1, a back drum 2 arranged behind the front drum 1, and a pair of lap plates 3 arranged on both sides of the drums 1 and 2. The front drum 1 and the back drum 2 constitute a pair of take-up drums, which are driven and rotated to sandwich the bobbin 4 between a pair of lap plates 3 and the drive rotation of both the drums 1 and 2 causes the back drum 1 to rotate. The fleece F supplied from the calender rollers 5, 6, 7 arranged on the upstream side of the drum 2 is fed to the bobbin 4
It is rolled up into a wrap.

Then, when the wrap is full, the rotation of the calender rollers 5, 6, 7 is stopped while the drums 1 and 2 are being rotated, so that the fleece F is formed between the back drum 2 and the calender roller 5. You are disconnected. After cutting the fleece F, the full lap is discharged from the lap forming device A, the bobbin 4 is sandwiched between the pair of lap plates 3 for the next lap formation, and the wrap is cut by the method described later. The cut Fa of the fleece F is wound around the bobbin 4.
However, in the conventional method, the fleece at the winding start portion of the wrap is double-wound, which causes various troubles due to this in the subsequent steps.

The cut Fa of the fleece F which has been conventionally performed is bobbin 4
The first method of winding the machine around the machine is to start the machine at low speed and start high speed after a predetermined time has passed.

This method will be described with reference to FIG. 3. Before the machine frame is operated, the cut Fa of the fleece F is shown in FIG.
As shown in Fig. 5, the cut Fa is located between the back drum 2 and the calendar roller 5, and when the machine base is operated at a low speed in this state, the cut Fa of the fleece F is lifted [Fig. The cut face Fa of B is bent and doubled, and enters between the back drum 2 and the bobbin 4 (FIG. (C)). Fleece F in doubled state
When the cut face Fa of the fleece F comes out between the front drum 1 and the bobbin 4, the cut face Fa of the fleece F is bent, so that it does not wind around the bobbin 4 and jumps out in front of the machine base as it is [(Fig. D)]. When the tip portion of the fleece F jumps out in front of the machine base for a predetermined length, the resistance of the fleece F that has jumped out increases, and the fleece F does not jump out any further. In the same figure (e), after that,
The machine base rotates at high speed and the fleece F is wound around the bobbin 4 to form a wrap.

Therefore, the winding start portion of the wrap thus formed is in a double winding state.

The second method of winding the cut Fa of the fleece F around the bobbin 4 that has been conventionally performed is to start the machine base at a low speed, and after the fleece F has spun for a certain length, brake the motor of the machine base. It is a method of restarting the machine base at a low speed after a predetermined time has elapsed after stopping the motor and stopping the motor.

This method will be described with reference to FIG. 4. The cut Fa of the fleece F before the start of the machine base is located between the back drum 2 and the calender roller 5 [FIG. When the machine base is started at a low speed in this state, the fleece F is spun, and when the fleece F is spun for a predetermined length, the motor is braked to stop the machine base.

After a predetermined time has elapsed after the machine stand has stopped, the cut Fa of the fleece F that has been lifted is lowered by its own weight, and this part will not bend (Fig. (B),
(C)]. Even if double winding is prevented by this method, bobbin 4
If flocking or brushing on the outer peripheral surface of is worn,
Similar to the first method, the cut Fa of the fleece F jumps out in front of the machine base without being wound around the bobbin 4 [(D) in the figure]. It is bent and wound around the bobbin 4, and is wound as it is (Fig. (E)).

Therefore, also by the second method, when the bristles or the raised hairs on the outer peripheral surface of the bobbin 4 are worn away, the winding start portion of the formed wrap is double wound.

When a wrap having a double winding start portion is supplied to the ribbon wrap machine as described above, the following various problems occur.

(1) Since the fleece is double-wound and thick, the fleece cannot be completely gripped between the top roller and the bottom roller in the draft part of the next process, slipping and drafting. I will put it out as it is. Therefore, without being drafted,
The thick fleece from the draft part cannot pass between the table and the curl plate and gets stuck in this part.

(2) If the fleece is double and thick, the top roller is pushed up in the draft part, the stop motion is activated, and the machine base is stopped.

In addition, when a wrap having a double winding start portion is supplied to a combing machine, the following various problems occur.

(1) Since the fleece is double and thick, extra force may be applied to each needle of the cylinder and the top comb during combing, and the needle may be broken.

(2) Since the fleece is thick, the fleece cannot be gripped by the detaching roller, and the fleece may fall off due to the next combing, and the fleece may be cut off. This causes disparity in the gelen and reduces the quality of the product.

In addition, in both ribbon wrap mamine and combing machines, operating efficiency is reduced by stopping the machine base, productivity is reduced, more labor is required for restarting, and the running cost of the machine is increased. I will end up.

Furthermore, the outer surface of the bobbin is flocked or brushed in order to facilitate winding of the fleece cut, but if this wears out, the fleece will not wind easily, resulting in a double layer. Since winding is likely to occur,
It is necessary to reprocess the outer peripheral surface of the bobbin in a short cycle.

[Problems to be Solved by the Invention]

In view of the above-mentioned various problems, the present invention prevents the fleece from being double wound at the beginning of winding the wrap by a simple means, so that each work in the subsequent process is not hindered. The task was to do.

[Means for solving the problem]

The present invention for solving the above-mentioned problems, in a state in which a bobbin placed on a front drum and a back drum which configures a pair of winding drums is urged downward by a pair of lap plates, The bobbin is driven to rotate by driving rotation, and a cut of the fleece supplied from the upstream side of the back drum, and a fleece that is subsequently fed out are wound around the bobbin and fed out to the outer peripheral surface of the back drum. The machine base is rotated at a low speed for a fixed time after the machine base is started so that the fleece cut surface does not rise, and the entire width of the bobbin is extended from the front of the front drum toward the back drum. By applying the air flow along the outer peripheral surface of the front drum, the air flow from between the front drum and the bobbin to the outside of the front drum. Causing the cut fleece fed out along the surface, the fleece cut, and the fleece fed Following this is that as wound continuously in the bobbin.

[Operation of the invention]

The machine base operates at a low speed so that the fleece cut out on the outer peripheral surface of the back drum does not float up for a certain period of time after its startup, so the fleece cut is cut from between the front drum and the bobbin. It is delivered smoothly. Immediately before the fleece is cut out from between the front drum and the bobbin, an air flow over the entire width of the bobbin is supplied from the front of the front drum toward the back drum along the outer peripheral surface of the front drum. Then, a cut portion of the fleece fed out along the outer peripheral surface of the front drum is raised from between the front drum and the bobbin, and the cut portion of the fleece and the fleece fed subsequently thereto are continuously wound around the bobbin.

In this way, the airflow supplied to the cut portion of the fleece is not blown directly to this cut portion but is supplied along the outer peripheral surface of the front drum, so The air flow to be blown is orderly, and the blowing direction is constant. As a result, the fleece cut is regularly raised over its entire width and wound around the bobbin.

Thereby, the cut end of the fleece is surely wound around the bobbin, and it is possible to prevent the winding start portion of the wrap from being double wound.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to examples. The same parts as those described in the section of "Prior Art" are designated by the same reference numerals, and a duplicate description will be avoided, and only the part related to the present invention will be described.

In FIG. 1 and FIG. 2, the air ejecting device B is composed of a nozzle 8, a solenoid valve 9, a pressure adjusting valve 11 and a hose 12 connecting these, and a compressed air source is supplied with compressed air through the hose 12. Is supplied.

Immediately in front of the front drum 1, a lap guide plate 13 for discharging the lap formed by the lap forming device A is arranged substantially horizontally, and lap guides 14 are provided on both sides of the lap guide plate 13. Installed.

The nozzle 8 of the air ejection device B is a lap guide plate.
The air flow which is attached directly above 13 collides with the upper surface of the lap guide plate 13 and bounces back, and the present invention utilizes this bounced air flow,
The cut Fa of the fleece F is to be surely wound around the bobbin 4.

A method for winding the cut Fa of the fleece F around the bobbin 4 according to the present invention will be described with reference to FIG.

When a certain amount of the fleece F is wound around the bobbin 4 and the preceding lap becomes full, the rotation of each calendar roller 5, 6, 7 is stopped and the back drum 2 and the calendar roller 5 are stopped.
The fleece F is cut between the wrap and the full wrap, and the lap forming device A is attached to the lifter device C.
At the same time, the bobbin 4 for forming the next lap is supplied to the lap forming device A.
Is in contact with the front drum 1 and the back drum 2 and is sandwiched by the pair of lap plates 3, and is in the state shown in FIG.

In this state, when the machine base is started at a low speed and the motor is stopped without braking after a certain period of time, the cut Fa of the fleece F becomes, as shown in FIG. 2 is approaching the contact area. Since the motor of the machine stand was stopped without applying the brake, the drums 1 and 2 are slowly rotating due to inertia, which causes the cut Fa of the fleece F to be lifted up without causing the back drum 2 and the bobbin 4 to move. And reaches a portion near the contact portion between the front drum 1 and the bobbin 4 [FIG.

In this state, restart the machine at a low speed and at the same time
When air is jetted from the nozzle 8 of the air jetting device B [(d) in the figure], the jetted air flow D is the lap guide plate.
It collides with 13 and bounces off, and about half of it becomes an airflow toward the upstream side and flows along the outer peripheral surface of the front drum 1. The airflow flowing toward the upstream side along the outer peripheral surface of the front drum 1 is rectified over the entire width of the bobbin 4. As a result, the cut Fa of the fleece F fed out from between the front drum 1 and the bobbin 4 is caused by the airflow that flows in orderly along the outer peripheral surface of the front drum 1, and this cut Fa and this After that, the fleece F that is fed out is securely wound around the empty bobbin 4 [(e) in the figure].

After the cut Fa of the fleece F is wound around the empty bobbin 4 and a predetermined time has passed, the machine base is switched to high speed operation and a predetermined amount of the fleece F is wound around the bobbin 4 to form a wrap.

Further, in the above-described embodiment, the air flow D ejected from the nozzle 8 is collided with the lap guide plate 13 and the air flow Da that has bounced back to the upstream side is caused to follow the outer peripheral surface of the front drum 1, so that the fleece F Although the cut Fa is raised and wound around the empty bobbin 4, the present invention utilizes the air flow that flows along the outer peripheral surface of the front drum 1 and is fed from between the front drum 1 and the bobbin 4. Since it is essential to raise the cut Fa of the fleece F, it is also possible to allow an air flow to flow from the downstream side of the front drum 1 directly along the outer peripheral surface thereof.

〔The invention's effect〕

(1) The present invention rotates the machine base at a low speed for a fixed time after the machine base is started to such an extent that the cut edge of the fleece that is fed to the outer peripheral surface of the back drum does not rise, and the machine is backed from the front of the front drum. A fleece fed along the outer peripheral surface of the front drum from between the front drum and the bobbin by exerting an air flow over the entire width of the bobbin along the outer peripheral surface of the front drum in the direction of the drum. Since the air flow that extends to the rectifier is rectified, the kerf of the fleece is raised over its entire width without being disturbed by the rectified air flow, and the kerf of the fleece and the slicing that follows it are delivered. The fleece to be wound is continuously wound around the bobbin.

As a result, it is possible to prevent the free cut end from being reliably wound around the bobbin and prevent the winding start portion of the wrap from being double wound.

(2) By eliminating the double winding of the winding start portion of the wrap, the thickness of the fleece becomes uniform, and in the ribbon wrap machine, the fleece is smoothly drafted by the draft part and at the curl plate portion. The fleece is not clogged.

Further, in the combing machine, breakage of the needles of the cylinder and the top comb is eliminated, and the fleece breakage is eliminated.

In both the ribbon wrap machine and the comber machine, the machine stand does not stop due to the double winding of the wrap winding start portion, and the operation efficiency increases.

(3) The fleece is cut by the action of the rebounding airflow and wound around the bobbin. Using the flocking or brushing applied to the outer peripheral surface of the bobbin as in the conventional method, the fleece is used. Since the tip of the bobbin is not wound around the bobbin, the fleece cut can be wound around the bobbin even if the flocked or raised hair is worn away, and the number of times the bobbin can be used is increased. The period for reprocessing the outer peripheral surface becomes longer, which leads to cost reduction.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a lap forming apparatus A equipped with an apparatus for carrying out the present invention, and FIGS. 2 (a) to (e).
Is an explanatory view of the operation of the present invention, FIG. 3 (a) to (e)
FIG. 4 is an operation explanatory view of a conventional winding method, and FIGS. 4A to 4E are operation explanatory views of another conventional winding method. The explanation of the reference numerals of the main parts constituting the present invention is as follows. A: Lap forming device, B: Air jetting device D: Air flow, Da: Air flow rebounding upstream F: Fleece, Fa: Fleece cut edge 1: Front drum, 2: Back drum 4: Bobbin, 3: Lap Plate 8: Nozzle, 13: Lap guide plate

Claims (2)

(57) [Claims] 1. A bobbin mounted on a front drum and a back drum, which constitutes a pair of winding drums, is urged downward by a pair of lap plates, and the bobbins are driven and rotated by the pair of winding drums. A method of winding a fleece cut supplied from the upstream side of the back drum by following rotation and a fleece that is subsequently drawn out around the bobbin, wherein the cut end of the fleece drawn out to the outer peripheral surface of the back drum is raised. The machine is rotated at a low speed for a certain period of time after the machine is started so that the airflow across the entire width of the bobbin is directed from the front of the front drum toward the back drum. By applying it along the outer peripheral surface of the drum, it is fed out from between the front drum and the bobbin along the outer peripheral surface of the front drum. A method of winding a fleece cut on a bobbin, wherein the fleece cut is raised, and the fleece cut and the fleece fed subsequently thereto are continuously wound around the bobbin. 2. An air flow bounced back to the upstream side is made to come to the outer peripheral surface of the front drum by making the air flow collide with the lap guide plate which is arranged substantially horizontally just before the front drum from substantially directly above the lap guide plate. The method of winding the cut end of the fleece on the bobbin according to claim 1, wherein the bobbin is wound along the bobbin.