CN114007967B

CN114007967B - Method for placing fiber strips in cans

Info

Publication number: CN114007967B
Application number: CN202080044072.XA
Authority: CN
Inventors: 托马斯·巴尔文; 马丁·多文; 亚历山大·霍恩; 安德烈亚斯·泽博德卡
Original assignee: Trutschler Group Europe
Current assignee: Trutschler Group Europe
Priority date: 2019-06-19
Filing date: 2020-02-07
Publication date: 2023-11-10
Anticipated expiration: 2040-02-07
Also published as: WO2020253997A1; CN114007967A; EP3986816A1

Abstract

The invention relates to a method for placing a fibrous material in a can (1), comprising a first step in which a fiber material winding head is positioned above the can (1) into a predetermined starting position (2). Followed by a cycle. The cycle comprises a first cycle step in which a predetermined length of fibrous material is placed in the barrel (1). In other words, the position of the loop head is not changed. The winding head is then removed from the current position in a second circulation step according to predetermined information. The predetermined lengths of fibrous material differ from one another between at least two cycles.

Description

Method for placing fiber strips in cans

Technical Field

The present invention relates to the placement of fibrous material in cans.

Background

A method of placing fibrous material, in particular a fiber sliver, comprises rotation of a stationary coiler drum above a can. When the barrel is circular, the barrel rotates, and when the barrel is rectangular, the barrel swings. This results in the next layer of fibre sliver being placed over the same fibre sliver ring of the previous layer of fibre sliver after each turn or oscillating movement of the sliver can. Whereby the intersections of the individual sliver depositing layers are vertically stacked. This results in a rapid increase in the height of the sliver. In order to be able to place the fibre material sufficiently, the fibre strands must be pressed strongly, which has an adverse effect on the quality of the fibre material.

To cope with this problem, it is known to make irregular changes in the position of the winding head. The disadvantage is that it is completely uncertain where the crossing points are formed and how many layers of fibrous material are superimposed at these points. In particular, it may be the case that the layers that overlap at some of the intersections are significantly less than the layers that overlap at other intersections, so that the maximum amount of fillable fibrous material is reduced. It is not possible to predetermine in the result how much fibrous material can ultimately be placed in the barrel. This displacement of the coiler head likewise causes an unstable and sudden movement and thereby a loading of the can coiler.

Disclosure of Invention

The object of the invention is to address the aforementioned disadvantages.

The method according to the invention for placing fibrous material in a can has a first step in which a fibre material winding head is positioned above the can into a predetermined starting position. Followed by a cycle. The cycle comprises a first cycle step in which a predetermined length of fibrous material is placed in the barrel. In other words, the position of the loop head is not changed. The winding head is then removed from the current position in a second circulation step according to predetermined information. This means that it is precisely up to a certain amount of fibrous material which is placed in the can by the winding head in the holding position. The predetermined displacement of the winding head allows the number of layers to be reduced, which are superimposed at the respective crossing points, when the number of layers is predetermined, and thereby the filling quantity can be maximized and/or the quality of the deposited fibrous material can be positively influenced in particular. The predetermined lengths of fibrous material differ from one another between at least two cycles. This enables the position of the intersection to be predictably changed, especially when the barrel is circular, also when there are only two predetermined positions of the can ends.

The cycle is preferably repeated until the barrel is filled.

The predetermined length of fibrous material preferably corresponds to the output quantity during one revolution of the barrel. This is a form which can be realized very simply in terms of control technology in order to optimize the placement of the fibrous material.

The predetermined length of fibrous material may alternatively or additionally coincide with the output during placement of the loop of fibrous material. This enables the position of the winding head to be changed a number of times during the placement of the fibre material layers, which are placed in one revolution of the can. The loop head can be displaced from the end position to other positions in a stepwise or continuous manner.

The displacement of the coiler head is preferably carried out between a plurality of predetermined end positions of the coiler head in at least one cycle. Thereby increasing the degree of freedom so that the fibrous material can be optimally placed.

The placement of the fiber strands is preferably performed such that the number of loops of fiber material placed in one revolution of the can is prevented as an integer. This means that after one revolution of the can, not the start of one fibre strip, but later. This also reduces the number of layers that overlap at each intersection.

The displacement of the winding heads is preferably carried out in such a way that the winding heads are accelerated in a targeted manner at the beginning of each displacement process and/or are braked in a targeted manner at the end of each displacement process. This results in a relatively small load on the can coiler which has the coiler head and moves the coiler head.

The fibrous material placed preferably involves a fiber sliver.

Drawings

Additional features and advantages of the invention are set forth in the description of the preferred embodiments which follows. In the figure:

figures 1a and 1b show circular cans in two filling states of a fibre material placement method according to a first embodiment of the invention,

figures 2a and 2b show two drawings of the placement of two related fibrids in a circular cylinder according to a second embodiment of the invention,

figure 3 shows a circular cylinder filled with a fibrous material placement method according to a third embodiment of the invention,

figure 4 shows a larger circular cylinder filled with a fibrous material placement method according to a third embodiment of the invention,

figures 5a and 5b show circular cans in two filling states filled by a fibrous material placement method according to a fourth embodiment of the present invention,

fig. 6a, 6b, 6c and 6d show diagrams illustrating placement methods according to other embodiments of the invention,

fig. 7a, 7b and 7c show circular cans in two filling states of the method of placing fibrous material according to the embodiment of the invention shown in fig. 6d and also presented in a side view.

Detailed description of the preferred embodiments

Fig. 1a and 1b show a circular cylinder 1 in two filling states of a fibre material placement method according to a first embodiment of the invention. In fig. 1a state of the cartridge 1 is shown, wherein the cartridge has completed a single revolution during filling of the fibre material. When reference is made to the laid fiber loops here, only the uppermost fiber loop is assigned the reference numeral 7 in each figure. An air hole (spandloch) 5 is gradually formed in the center of the barrel 1. As can be seen, the position of the coiler head is changed from position 3 to position 2. The positions 2, 3 here always represent the center point of the respective laid fiber strand loops 7.

When the cartridge 1 is filled, the state shown in fig. 1b is assumed. As can be seen, the air holes 5 have become very small. The number of layers of fibrous material at the points of intersection in the vertical direction, in other words in the direction into the page or out of the page according to fig. 1a and 1b, is thereby likewise reduced.

Fig. 2a and 2b show two drawings of the placement of the fibre sliver in a circular sliver can 1 according to a second embodiment of the invention. According to the method shown in fig. 2a, there are three positions 3-5 for the loop head. As a variant, the drawing shown in fig. 2b has different lying planes 6 ₁ -6 ₅ . As can also be seen here,the air holes 5 are also very small. In the lowermost plane (position 4), the ring 7 is preferably placed along the interior of the can 1, which is not further shown. The winding head is thereafter shifted to a position 3 coinciding with the intermediate position of the winding head. Thereafter, the coiling head is moved to position 2 in two superimposed planes or left in position 2. Thereafter, the loop head is again moved to position 4 and then to position 2. The change between said positions 2-4 is thus always performed after a single revolution of the can or after the length of the fibre sliver, during which revolution the length of fibre sliver is placed at the respective position 2-4. The data about the respective fiber strand length can be stored in a database in connection with the respective winding head position and can be read simply by means of a controller of the winding head. A very simple method for moving the winding head or leaving the winding head in place is thus obtained.

Fig. 3 shows a circular cylinder 1 filled with a fibrous material placement method according to a third embodiment of the present invention. Here again there are three placement positions 2-4. However, the fiber strands are placed such that they successively move towards the positions in succession (in the order of 2, 3, 4, 2, 3, 4 … …).

Fig. 4 shows a circular cylinder 1 filled with a fibrous material placement method according to a third embodiment of the present invention. However, the diameter of the circular barrel 1 shown here is larger than in fig. 2a and 2 b. Thus, a more different placement diagram is given in fig. 4 compared to fig. 2a and 2 b.

Fig. 5a and 5b show a circular cylinder 1 in two filling states of a fibre material placement method according to a fourth embodiment of the invention. In this embodiment again there are only two positions 2, 3 for the loop heads. However, during one revolution of the barrel, the loop head is continuously moved from position 2 to position 3 and back again. In other words, the distance of the fiber strand 7 from the inner wall of the can 1 preferably varies continuously. Furthermore, according to fig. 5a, after one revolution of the can, the fiber strand 7 is displaced to the right with respect to the vertical center axis, against the inner wall of the can 1. However, at the beginning of the placement of the sliver, the center point of the respective sliver ring 7 is directly on said central axis. In other words, the position 2 to which the winding head is repeatedly moved, the winding head "walks" along a circumferential line around the centre point of the can 1.

When the cartridge 1 is filled, the placement diagram shown in fig. 5b is presented. As can be seen here, the air holes 5 again become very small.

Fig. 6a, 6b, 6c and 6d show three charts showing different placement methods.

According to fig. 6a, the position of the coiler head here is changed between the two positions 2, 3 only during the first three revolutions of the can. Thereafter, the loop head remains in position 3, as is known in conventional placement methods. The effect of the dashed lines is that the corresponding turning points of the graph are shown in relation to the individual turns of the barrel.

According to fig. 6b, the change between the positions 2, 3 is repeated after each rotation of the can and is repeated until the can 1 is filled at the n-rotation of the can.

According to fig. 6c, the change between the positions 2, 3 is performed after a slightly larger rotation of the cartridge (for example after a rotation of the cartridge of 370 °) and again until the cartridge 1 is filled at a rotation of the cartridge n.

According to fig. 6d, the change between the positions 2, 3 is alternately performed after a slightly smaller rotation of the drum (for example after a rotation of the drum of 350 °) and after a very rotation of the drum, respectively, and again until the drum 1 is filled at a rotation of the drum of n.

Fig. 7a, 7b and 7c show the circular cylinder 1 in three filling states according to the fibre material placement method of fig. 6 d. The can 1 is shown in fig. 7a in a state in which a single revolution has been completed during filling of the fibre material, and fig. 7b shows the can 1 after two revolutions.

Fig. 7c shows the effect of the change of position of the can ends when the can 1 is filled. The transformation causes the normally vertically superimposed and corresponding positions of the two directly superimposed fiber strand loops 7 to "wander", more precisely obliquely upward and rightward. It is clear that there are thus fewer layers vertically overlapping at said crossing points when the cartridge 1 is filled.

The invention is not limited to the embodiments given above. The embodiments can be interchanged or combined with one another in any manner.

The number of positions to which the loop heads are moved may vary. This number may in particular be greater than 3.

The method is not limited to a particular fibrous material. The fibrous material is preferably a fiber sliver, but may also be a roving.

The method according to fig. 5a and 5b can be combined, for example, with the method according to fig. 1a and 1b, so that the ring position 7 according to fig. 5a changes after one revolution of the can, while the can-end also changes its position.

In all methods, the rotation angle of the can 1 with respect to the positional change of the can ends can be always or only partially identical, smaller or larger than 360 °.

The invention provides in the result a very universally applicable method in which it can be predetermined where the crossing points are located and how many layers are expected to overlap on said crossing points.

List of reference numerals

1. Barrel strip

2-4 position

5. Air holes

6 _i, i epsilon N placement plane

7. Fiber strip ring

Claims

1. A method of placing fibrous material in a barrel (1),

it has:

-a first step of positioning a winding head of fibrous material in a predetermined starting position (2) above the can (1), and

-repeating thereupon the cycle comprising

A first circulation step of placing a predetermined length of fibrous material in the barrel (1), and

a second cycle step of immediately removing the winding head from the current position according to predetermined information,

wherein the predetermined lengths of fibrous material differ from each other between at least two cycles,

wherein the change between the starting position (2) and the second position (3) is performed after a slightly larger rotation of the drum, respectively, until the drum (1) is filled during the drum n rotation, or

The change between the starting position (2) and the second position (3) is alternately performed after a slightly smaller rotation of the drum and after a very rotation of the drum, respectively, until the drum (1) is filled at the drum n rotation.

2. The method of claim 1, wherein the predetermined length of fibrous material coincides with the output amount during one revolution of the barrel.

3. A method according to claim 1, wherein the predetermined length of fibrous material coincides with the output quantity during the placement of the loop (7) of fibrous material.

4. A method according to claim 2, wherein the predetermined length of fibrous material corresponds to the output quantity during the placement of the loop (7) of fibrous material.

5. The method of any of claims 1-4, wherein the displacement of the coiler head is performed between a plurality of predetermined end positions of the coiler head in at least one cycle.

6. A method according to any of claims 1-4, wherein the placing of the fibre sliver is performed such that the number of loops (7) of fibre material placed in one revolution of the sliver can is prevented as an integer.

7. The method according to any of claims 1-4, wherein the displacement of the can ends is performed by

The loop head is accelerated in a targeted manner at the beginning of the displacement processes, and/or

The coiler head is braked in a targeted manner at the end of each displacement process.

8. The method of any of claims 1-4, wherein the fibrous material is a fiber sliver.