CN203429309U - Web guiding device with stop motion arrangement - Google Patents

Abstract

A web guiding device with stop motion arrangement for a textile machine such as draw frame comprising a drafting arrangement with plurality of drafting rollers and a deflecting roller (20), a web funnel (21) with a stop motion arrangement (41), a sliver funnel (31) with sliver funnel holder (33), and a calendering unit with pair of draw-off discs (8, 9), wherein said web funnel (21) is provided with at least two movable plates (23, 24) and the movement of one plate actuates the other plate to stop the machine.

Description

Fabric guiding device with stop motion device

related application

This application claims priority from Indian Patent Application No. 3618/CHE/2010, filed November 30, 2010, by Lakshmi Machine Works Ltd., entitled "Fabric Guiding Apparatus with Stop-Motion Device and Method", the full text of which is incorporated herein by reference. the

technical field

The invention relates to a guiding device for nonwoven fiber fabrics for converting a spread fabric into sliver form at the outlet of a drawing frame of a textile The sliver coming out of the sliver funnel is guided to the draw off disc device. the

In another aspect, the invention relates to a textile machine, in particular a drawing frame, card or combined machine, with a device for producing a spread non-woven fabric, for example with a drawing frame device. the

Background technique

The invention relates to a spinning preparation machine, such as a draw frame. A plurality of slivers are joined together and the joined sliver is conveyed to a drawing frame unit in the draw frame. During the drawing frame process, the sliver is drafted to form a fiber web and transported past a pair of transfer rollers of a drawing unit. The spread fiber web must be reshaped to form a sliver. This is achieved by fabric funnels and sliver guide tubes located at the transfer section of the draw frame unit. As the fiber web enters the fabric funnel, the sliver is formed again. A calendaring unit is located downstream of the drawing-frame unit, which comprises at least two opposing withdrawal discs through which the sliver is compressed. After passing through the pair of withdrawal discs, the compressed sliver is sent to the deposition device of the draw frame. the

It is known in the art that a pair of transfer rollers convey the fiber web to a web collector arranged at the outlet of the draw frame unit of the draw frame. The fabric collector is pivotally mounted on the machine frame by using a connecting plate and a cylindrical shaft. The fiber fabrics are combined in the fabric collector and shaped by an insert located in the center of the fabric collector to form a sliver again and sent to a sliver guide tube of considerable length. The fabric collector and the sliver funnel are separated by a considerable distance by the sliver guide tube. At the end of the sliver guide tube, the sliver is inserted into the sliver funnel, which deflects the direction of transport of the sliver by approximately 90° and inserts the sliver between the withdrawal disk arrangements. After passing through a pair of withdrawal discs, the sliver compressed there is sent to the depositing device of the draw frame. the

A stop motion device is provided in the exit area of the draw frame unit for stopping the machine if the sliver breaks at any point between the transfer tube and the withdrawal disc. A sensor plate is mounted with the fabric collector device and is detected by a sensing device such as a limit switch. When a sliver break occurs, the conveyed material accumulates inside the fabric collector. As the fabric collector is pivotally mounted, the accumulated mass of fibrous material will lift the fabric collector and the detection plate fixed on the cylindrical shaft thereby moves downwards. A sensing device detects this movement of the detection plate and stops the machine. the

In existing fabric guiding devices, the sliver will pass through a sliver guide tube of at least 264mm length. This excessively long sliver guide tube will affect the quality of the transmission sliver when the machine is running at a high speed (more than 800 m/min). During the breakage of the transport sliver, the loss of material is high and the sliver guide tube needs to be cleaned frequently to prevent short fibers from accumulating on the inner wall of the sliver guide tube, which is very disadvantageous. the

Existing stop devices consist of a fabric collector, a pair of connecting plates and a sensor plate, which require a higher actuation force to operate in the event of a sliver break. Consequently, material accumulating in the fabric collector requires stopping the machine. This leads to a delay in detecting the break and consequently increased loss of material. the

There is therefore a need to develop an improved web guiding device and stop motion device which overcomes the disadvantages present in existing textile machines, especially draw frames. the

Contents of the invention

The basic object of the present invention is to provide an improved web guiding device capable of overcoming the disadvantages present in known web guiding devices of draw frames. the

Another object of the present invention relates to providing a textile draw frame with an improved stop motion device which is structurally simple and functionally effective compared to the stop motion devices used in existing draw frames. the

According to an essential aspect of the invention, a fabric guiding device with a stop motion device for a textile machine such as a draw frame comprises a draw frame device with a plurality of drafting rollers and deflection rollers, a A fabric funnel, a sliver funnel with a sliver funnel holder and a calendering unit with a pair of withdrawal discs, wherein the fabric funnel is equipped with at least two movable plates, the movement of one of which actuates the other, to stop the loom. the

The fabric funnel in the fabric guiding device consists of a fabric collector, a back plate, a front plate, an insert and an insert holder. The back and front panels are pivotally mounted on sensor plate holders mounted on the bottom of the fabric collector, and both plates are provided with at least one "L" shaped portion. At least one "L" shaped portion is configured with a profile, and at least one detection device is mounted in place on the bearing housing to detect movement of the profile. the

During sliver breakage, once fibers accumulate in the curved portion of the fabric collector, the force of the accumulated fibers pushes the back plate; the "L" shaped part of the back plate moves upwards and A force is exerted on it; by means of this force the front plate moves away from the fabric collector and moves the profile upwards; the detection device detects this movement and stops the loom. the

Description of drawings

Exemplary embodiments are depicted by way of illustration, not limitation, of the figures in the drawings, in which like numerals indicate like elements, and wherein:

Fig. 1 is a schematic diagram of a conventional fabric guiding device and a stop motion device of a conventional draw frame. the

Figure 2 is a schematic view of a fabric guiding device according to the invention. the

Figure 3 depicts a fabric collector according to the invention. the

Figure 4 depicts an isometric view of a stop motion device according to the present invention. the

Figure 5 depicts the position of the stop-motion device in operation. the

Figure 5a depicts the position of the stop-motion device in its non-operating state. the

Detailed ways

Next, the embodiments of the present invention will be described with reference to the accompanying drawings. the

Attention is first drawn to Figure 1, which depicts the existing system of a draw frame, showing the location of the fabric guides. The fiber fabric is fed into the fabric hopper (3) from a pair of pulling rollers (1, 2). The spread fiber fabric is converted into sliver (S) form by an insert (4) arranged in the fabric funnel (3). Next, the undrawn sliver (S) is inserted into the long guide tube (5) mounted on the table (6) and fed into the calendering unit via the sliver funnel (7). The sliver funnel deflects the sliver (S) approximately 90° into the gap between the withdrawal discs (8, 9) of the calendering unit. After calendering, the sliver protrudes vertically downwards from the calendering unit and is stored in a depositing device. the

The fabric funnel (3) uses a pair of connecting plates (10) to be arranged in front of the conveying traction roller. The fabric funnel (3) is mounted at one end of a connecting plate (10) and the other end of the connecting plate (10) is fixed on a cylindrical shaft (11). A cylindrical shaft (11) is pivotally mounted on the table (6). A sensor plate (12) is mounted on the other side of the cylindrical shaft (11). A detection device, such as a limit switch (13), is rigidly mounted on a side portion of the table (6) and is positioned above the other end of the sensor plate (12). During normal operation, the switch (14) of the detection device (13) is continuously pressed by the sensor board (12). Once the sliver breaks at any point between the transfer roller and the coiler tube, the transferred fibrous material accumulates inside the fabric funnel (3). The increased amount of accumulated material pushes the fabric funnel (3) upwards, and the sensor plate (12) moves downwards thereby. This downward movement of the sensor plate (12) releases the switch (14) and closes the detection device and stops the machine. the

The present invention shortens the path of the sliver by streamlining the overlong sliver guide tube (5) and the complex stop motion device in the prior art. Figure 2 discloses an embodiment of the invention. Add deflection roller (20) in drawing frame device, deflection roller (20) makes the fiber fabric deflection from the conveying direction approximately 60 ° and guides sliver into fabric funnel (21). Fabric funnel (21) is made up of fabric collector (22), back plate (23) and front plate (24). As shown in FIG. 3, a hole (25) is provided in the middle of the fabric collector (22), and the sliver (also called fiber fabric) that becomes wider is folded, turned over, and inserted into the sliver forming part. The sliver forming part is constituted by an insert (26), and the insert (26) is firmly held by an insert holder (27). The insert holder is mounted on the bottom of the fabric collector (22) and secured by using fastening means. Slots (28) are provided in the side walls (29) of the fabric collector to position the fabric funnel (21) downstream of the transport draw rollers using pins (30) in bearing housings. the

The front of the insert holder (27) engages the inside of the sliver funnel (31). The sliver funnel (31) is configured as an insert, with V-shaped ends converging into a point, which engages between the extraction discs (8, 9) so as to directly face the gap (32). The sliver funnel (31) is shaped in such a way that it can be axially inserted into the sliver funnel holder (33). The sliver funnel holder ( 33 ) has a central, substantially cylindrical opening into which the sliver funnel ( 31 ) is inserted and can be held. the

Figure 4 depicts a stop motion device in a fabric funnel (21) according to the invention. The stop motion device (41) comprises a back plate (23), a front plate (24) and a detection device (49). The front and back panels can be made of metallic or non-metallic materials. The back plate (23) is pivotally mounted on pins (42, 42a) provided in sensor plate holders (48, 48a) mounted on the bottom of the fabric collector (22). At the bottom of the back plate (23), at least one "L" shaped portion (43) extends. The front plate (24) is pivotally mounted on pins (44, 44a) provided at sensor plate holders (48, 48a). At the bottom of the front panel (24), at least one "L" shaped portion (47) extends. The "L" shaped section (43) on the back panel (23) rests on the "L" shaped section (47) of the front panel (24). At the top of the front plate (24) a plated steel plate (45) is secured by screws (46) to hold the front plate in the working position during normal operation. The "L" shaped portion (47) is configured with a profile (50). A detection device (49) is mounted on the bearing housing in a position to detect the movement of the profile (50). During normal operation of the machine, the "L" shaped portion (43) of the back plate (23) presses against the "L" shaped portion (50) of the front plate (24). the

Figures 5 and 5a depict the mode of operation of the stop-motion device according to the invention. As shown in Figure 5, during normal operation, the back panel (23) and front panel (24) are in contact with the fabric collector (22). When the sliver breaks at any point between the fabric funnel and the take-up tube, the fiber fabric will accumulate in the curved portion of the fabric collector (22). As the amount of material increases, the backing plate will be pushed by the force from the accumulating material and the backing plate (23) moves backwards, as indicated by arrow (A). Due to this movement, the "L" shaped part (43) moves upwards and exerts a force on the "L" shaped part (47). Due to the applied force, the front plate (24) moves away from the fabric collector (22) in the direction indicated by the arrow (B). Due to this movement, the profile (50) moves upwards and this movement is detected by the detection device (49) and the machine is stopped. Figure 5a shows the position of the stop motion device in the non-operating state. the

The web guiding device with stop motion device according to the invention has the following advantages. The fabric guiding device eliminates the excessively long sliver funnel, and the speed of the machine can thereby be increased to 1100 m/min, whereas existing devices can only reach 800 m/min. The travel distance and the deflection angle of the conveying sliver are significantly reduced, and the quality of the conveyed material is thereby increased. The stop motion device in the fabric guiding device is simple in structure and works more efficiently than the prior art. An activation force of 1.485 kg is required to operate the existing stop motion device, whereas in the present invention only 0.04 kg of activation force is sufficient to stop the machine. Thus, even the smallest amount of fiber web accumulates in the web collector, the machine can be stopped immediately, and thus the loss of fiber material is significantly reduced. the

It will be obvious to those skilled in the art to make other modifications and changes to suit particular requirements and circumstances, and therefore the invention should not be considered limited to the presently preferred embodiment, which was chosen for illustration only It is intended that the present invention cover all changes and modifications that do not depart from the spirit and scope of the invention. the

Claims (9)

1. for the fabric guides equipment with stop motion device of the weaving loom such as drawing frame, comprising:

A) there is the drawing device of a plurality of carry-over pinch rolls and deflection roll (20),

B) there is the fabric funnel (21) of stop motion device (41),

C) there is the sliver funnel (31) of sliver funnel retainer (33), and

D) there is the calender unit of a pair of extraction dish (8,9),

It is characterized in that, described fabric funnel (21) is provided with at least two plates that can move (23,24).

2. fabric guides equipment according to claim 1, wherein said fabric funnel (21) comprises backboard (23) and header board (24); Another plate of the motion actuation of a plate is to stop weaving loom.

3. fabric guides equipment according to claim 1, wherein said fabric funnel (21) also comprises fabric collector (22), insert (26) and insert retainer (27).

4. fabric guides equipment according to claim 1, wherein in the sidewall (29) of described fabric collector (22), groove (28) is set, and uses described groove (28) and be arranged on pin (30) in bearing block and described fabric funnel (21) is installed to the downstream of transmission carry-over pinch rolls.

5. fabric guides equipment according to claim 1, is wherein installed in the place, bottom of fabric collector (22) with the insert retainer (26) of insert (21).

6. the stop motion device in fabric guides equipment claimed in claim 2, wherein said backboard (23) can be pivotally mounted on pin (42,42a), described pin (42,42a) be arranged on sensor board retainer (48,48a) in, described sensor board retainer (48,48a) be installed on the bottom of fabric collector (22), and extend at least one " L " shape part (43) at bottom place's backboard (23) of backboard (23).

7. the stop motion device in fabric guides equipment claimed in claim 2, wherein said header board (24) can be pivotally mounted on pin (44,44a), described pin (44,44a) be arranged on sensor board retainer (48,48a) locate, and extend at least one " L " shape part (47) at bottom place's header board (24) of header board (24).

8. the stop motion device in fabric guides equipment claimed in claim 7, wherein said " L " shape part (47) is configured with profile (50), and checkout equipment (49) is installed in place on bearing block, to detect the motion of described profile (50).

9. the stop motion device in fabric guides equipment claimed in claim 2, is wherein fixed on clad steel sheet (45) by screw (46) place, top of described header board (24).

Images