Spinning preparation machine

Abstract

The invention relates to a spinning preparation machine (1) for blended fibers and to a method for fitting a brad curtain (25). The spinning preparation machine (1) has at least three shafts (2, 3, 4, 5), a conveyor belt (23) arranged below the shafts (2, 3, 4, 5) for removing fibrous material from the shafts (2, 3, 4, 5), and a brad curtain (25) configured as an ascending conveyor. The shaft walls (2, 3, 4, 5) are arranged on both sides of the conveyor belt (23) and the brad curtain (25), the shaft walls (2, 3, 4, 5) having a distance (32) from each other which is at least 20 mm to 100 mm smaller than the width (31) of the conveyor belt (23) and the brad curtain (25).

Description

[0001] The invention relates to a spinning preparation machine for mixed fibers, comprising a fiber material inlet, at least three shafts, a conveyor belt and a corner nail curtain, wherein the conveyor belt is arranged below the shaft for removing the fiber material from the shaft, and the corner nail curtain is configured as an ascending conveyor next to the conveyor belt.

[0002] In the fiber preparation equipment of a spinning mill, supplied fibers or fiber tufts are prepared for the spinning machines. In the fiber preparation equipment, the fibers prepared for the spinning mill undergo several processing stages. In the first stage, the fibers are separated from the bales in the form of fiber tufts. A bale opener is typically used for this purpose. These tufts are carried out of the bale opener by pneumatic tuft transport and, for example, to a subsequent cleaning machine. After the cleaning machine, the fiber tufts are typically conveyed to a mixer, which ensures thorough mixing of the tufts, for example, via various shafts. The fibers are then removed from the mixer by a removal device, such as a tacking curtain, and transported further.

[0003] DE 197 16 792 A1 also discloses a shaft mixer with multiple shafts. The fiber material is pneumatically conveyed with the aid of transport air and distributed into the various shafts or chambers of the mixer. The transport air is discharged from the chambers through air-permeable side walls into exhaust ducts. The shaft mixer is divided into different shafts, each open at its top and connected to a pneumatic conveying line. The shafts initially extend vertically, then bend 90° so that the shafts or their fiber bundles now extend horizontally, resulting in horizontal stratification of the individual shaft fillings. A take-off belt positioned below the shafts guides the fiber layers onto a lifting curtain, which essentially passes vertically from bottom to top through all the fiber layers and removes the fibers. By configuring the mixer as a shaft mixer, due to the different shaft lengths—i.e., the path lengths that the fibers must cover—thorough mixing of the fibers is achieved. Fibers supplied to the mixer at other times, and therefore from other fiber bundles, are removed simultaneously from the different shafts by a removal device. This shaft mixer design has proven effective.

[0004] The shortcoming of this simple structure is that the space below the pull-out belt may be filled with fibers and must be cleaned subsequently. In addition, due to the installation position and characteristics of the component, replacing the component is expensive.

[0005] It is therefore an object of the present invention to provide a spinning preparation machine for mixed fibers which allows trouble-free operation and simple maintenance.

[0006] This object is achieved by a device having the features of the independent claims. To achieve this object, a novel spinning machine for mixed fibers is proposed, comprising a fiber material inlet, at least three shafts, a conveyor belt, and a gusset curtain as a conveyor element for the fiber material. The conveyor belt is arranged below the shafts for removing the fiber material from the shafts, and the gusset curtain is configured as an ascending conveyor adjacent to the conveyor belt. The fibers pass through each shaft and are preferably deflected and brought to the ascending conveyor by means of the conveyor belt. The principle of a fiber cluster flowing first vertically and then horizontally through the shafts before reaching the ascending conveyor is known from the prior art.

[0007] The conveyor belt and the brad curtain have a width transverse to the direction of transport. The length of the conveyor belt depends on the number of shafts provided in the spinning preparation. The length of the brad curtain, in turn, depends on the height of the spinning preparation machine. Typically, brad curtains are 6 to 8 meters long. Shaft walls are provided on both sides of the conveyor belt and brad curtain, with the shaft walls spaced apart from each other. The shaft walls are arranged laterally to the sides of the conveyor belt and brad curtain. At least in the area of ​​the conveyor belt and brad curtain, the distance between the shaft walls is 20 to 100 mm less than the width of the conveyor belt and brad curtain. Outside this area, the shaft walls can merge into the outer shaft walls. The outer shaft walls also form the outer shell of the spinning preparation machine. By moving the lateral shaft walls inward, the fiber material flow from each shaft is directed onto the conveyor belt or brad curtain, largely preventing contamination of the area below the conveyor elements and reducing the likelihood of malfunctions during operation. In a preferred embodiment, the area where the shaft walls are narrower than the conveyor belt or brad curtain extends at a height of 50 to 500 mm above the respective conveyor element. In this case, the width is smallest directly at the transport element and increases with increasing distance from the transport element until it reaches the width of the outer wall of the shaft.

[0008] Advantageously, the conveyor belt has a cleaning element at the end facing the corner-stitched curtain. This cleaning element prevents fiber residue from being carried by the endless conveyor belt around the deflection roller below the conveyor belt, while also ensuring a complete transfer of fiber material from the conveyor belt to the corner-stitched curtain. Preferably, the cleaning element is a scraper or a brush. Both variants have proven effective, with the cleaned fiber material being transferred directly to the corner-stitched curtain by the scraper.

[0009] Advantageously, the conveyor belt is designed as an endless belt with a releasable coupling. The conveyor belt is subject to wear from the transported fiber material and the cleaning elements. When the conveyor belt is replaced, the coupling, the deflection roller, and any supporting rollers can remain in the machine, and the new conveyor belt can be threaded in. After threading in, the coupling is closed again, and the conveyor belt operates as an endless belt.

[0010] Advantageously, the brace is formed from a plurality of pin strips, which are held together by screws or rivets on a strip extending across the width of the brace. This type of brace construction is known in the prior art, but offers particular advantages in this application because individual pin strips can be easily exchanged. The pin strips can also be designed so that they are located within the side shaft wall, but the strips securing the pin strips protrude beyond the shaft wall.

[0011] Preferably, the new tack curtain has a threading aid in the form of a belt or strip. Thanks to the threading aid, the tack curtain can be easily replaced without having to dismantle the main components of the machine. For a further description of the replacement process, refer to the following procedure.

[0012] In a further development, a magnetic separator is connected downstream of the braid curtain. This serves to remove metal components still contained in the fiber material, such as wire remnants from the fiber bale packaging, thereby preventing damage in the subsequent machine. Preferably, the magnetic separator comprises an electromagnet and a collecting tray arranged below it. This type of magnetic separator can be used in various ways, with electromagnets having the advantage over permanent magnets that the magnets can be easily cleaned by switching off the power supply. It is advantageous if the collecting tray is accessible from outside the spinning preparation machine for emptying. The magnetic separator is advantageously arranged in the upper region of the outlet channel, at the point where the fiber material is thrown onto the channel wall by the transport element.

[0013] Furthermore, a method for assembling a braided yarn preparation machine in the form of a shaft mixer is proposed. The machine comprises an ascending conveyor, a machine housing, and a controller. The ascending conveyor is configured as a braided yarn preparation machine and includes an upper drive roller and a lower tensioning roller. The braided yarn preparation machine is configured as an annular braided yarn preparation machine comprising a plurality of needle strips held on a belt, the annular braided yarn preparation machine being circumferentially arranged around the drive roller and the tensioning roller, and having a threading aid provided at the first end in the new state. A threading opening and an assembly opening are provided in the machine housing. The controller displays the following working steps on a display and inquires about their execution:

[0014] - Open the threading opening and side assembly opening

[0015] -Lift the tensioning roller to the assembly position

[0016] - Insert the threading aid of the corner nail curtain through the threading opening in the machine housing and pass the threading aid over the drive roller

[0017] - Enables the drive roller to be fine-moved in the opposite direction of rotation

[0018] - Pull the threading aid or the corner tack curtain further with the aid of a drive roller until the corner tack curtain reaches the assembly opening

[0019] -Fix the first end of the corner nail curtain in the assembly opening

[0020] - Prevent jogging via controller

[0021] -Remove the threading aid

[0022] -Insert the second end of the corner tack curtain through the assembly opening

[0023] -Connect the two ends of the corner tack curtain by inserting the missing pin strips

[0024] - Lower the tensioning roller to the operating position

[0025] - Close the assembly opening and threading opening

[0026] -Normal operation is achieved through the controller.

[0027] Due to the above process, there is no need to dismantle the entire rear area of ​​the spinning preparation machine. With the help of the controller to monitor or guide the operator, errors are avoided and a quick and simple replacement of the corner nail curtain is ensured.

[0028] The invention is explained below with reference to exemplary embodiments and is explained in more detail with the aid of the drawings.

[0029] In the accompanying drawings

[0030] Figure 1 shows a schematic diagram of a spinning preparation machine;

[0031] Figure 2 Shown according to Figure 1 A schematic diagram of a cross section at position XX;

[0032] Figure 3 A schematic diagram illustrating an embodiment of a cleaning element is shown;

[0033] Figure 4a 、 4b shows a schematic diagram of an embodiment of a magnetic separator, and

[0034] Figures 5a-5c A schematic diagram showing the threading process of a corner nail curtain is shown.

[0035] Figure 1 shows a schematic diagram of a spinning preparation machine 1 according to the present invention, Figure 2 Shown according to Figure 1Schematic diagram of a section at position XX of a spinning preparation machine 1 is shown, which has a machine housing 39 and a shaft mixer designed with four shafts 2 to 5. The individual shafts 2 to 5 are separated from each other by shaft partitions 17 to 19, wherein this separation extends over the entire width of the shaft mixer, but not over the entire height H of the shaft mixer. The shafts 2 to 5 are designed as top- and bottom-open shafts 2 to 5 and are bounded on four sides. For example, shaft 4 is bounded by shaft partitions 17 and 18 and shaft outer walls 21 and 22. Deflectors 20 are provided at the lower ends of the respective shaft partitions 17 to 19, directly adjacent to each shaft partition 17 to 19. The deflectors 20 serve to deflect the fiber flow sliding downward through the shafts 2 to 5 from vertical to horizontal motion. The shaft 5 is likewise provided with such a deflector 20 , in which all fiber flows from the shaft 5 are directed simultaneously to a conveyor belt 23 arranged below the shafts 2 to 5 .

[0036] With the aid of conveying air 9, fiber material is introduced into the spinning preparation machine 1 in the form of a fiber-air mixture 7 through the fiber material inlet 6 and guided via a distribution channel 10 via shafts 2 to 5 to the conveying air outlet 8. The distribution channel 10 is delimited on three sides by an upper distribution channel wall 12 and two side shaft outer walls 21 and 22. The distribution channel 10 is open relative to the shafts 2 to 5. A perforated element 11 is inserted at the transition from the distribution channel 10 to the conveying air outlet 8. The perforated element 11 separates the distribution channel 9 from the conveying air outlet 8. As a result, the conveying air 9 is separated from the fiber material.

[0037] A conveyor belt 23 is arranged below the shafts 2 to 5. The fibrous material is conveyed by the conveyor belt 23 in a transport direction 24 to an ascending conveyor in the form of a spike curtain 25. The spike curtain 25 is tensioned between an upper drive roller 37 and a lower tensioning roller 38. The spike curtain 25 in turn conveys the fibrous material in a transport direction 26 to an outlet channel 27. A fibrous material outlet 28 is located at the end of the outlet channel 27.

[0038] The conveyor belt 23 and the wicker curtain 25 have a width 31. The side shaft walls 15 and 16 are arranged in a region 29 for guiding the fiber material onto the conveyor belt 23 or the wicker curtain 25, respectively. The region 29 is defined by the course of the conveyor belt 23 and the wicker curtain 25 and by a height 30 above the conveyor belt 23 and the wicker curtain 25. In this case, the side shaft walls 15 and 16 are arranged at a distance 32 from one another in the region 29, wherein the distance 32 is smaller than the width 31 of the conveyor belt 23 or the wicker curtain 25, respectively.

[0039] Figure 3A schematic diagram shows an embodiment of a cleaning element 33 and a conveyor belt 23 with a coupling 34. A deflection roller 35 for the conveyor belt 23 and a tensioning roller 38 for the wicker curtain 25 are rotatably held in a machine housing 39. The conveyor belt 23 is guided around the deflection roller 35, with a section of the conveyor belt 23 facing the fiber material supported by a guide table 36. The conveyor belt 23 is endless and circulates in the conveying direction 26 during operation. It is equipped with a coupling 34 to facilitate removal. The wicker curtain 25 consists of a belt 40 to which a pin strip 41 is fixed. The pin strip 41 has a plurality of pins 42 across its width, which enables the fiber material to be transported vertically in the conveying direction 26. A cleaning element 33 in the form of a scraper 33 is positioned in the area of ​​the transfer point between the conveyor belt 23 and the wicker curtain 25. The scraper 33 removes fiber material from the conveyor belt 23 and prevents fiber from passing around the deflection roller 35 and reaching the area below the conveyor belt 23.

[0040] Figure 4a and Figure 4b A schematic diagram of an embodiment of a magnetic separator is shown. The embodiment shown is exemplary and allows for manual or motorized operation to empty the magnetic separator. Figure 4a The operating position of the magnetic separator installed in the channel wall 52 of the outlet channel 27 is shown, Figure 4b The magnetic separator is shown in the empty position. It has an electromagnet 55 mounted on a bracket 56. In the operating position, the electromagnet 55 contacts a cover plate 54 positioned in a cutout in the channel wall 52. As a result, metal components 53, guided through the channel wall 52 or the cover plate 54, respectively, remain adhered to the cover plate 54. The bracket 56 is supported at a pivot point 58 and pressed against the cover plate 53 by a spring 57. A collecting tray 59 is positioned below the electromagnet 55. The collecting tray 59 is supported at a pivot point 61 and is equipped with a latch 60. In the operating position, the side of the collecting tray 59 facing the fibrous material forms the channel wall 52.

[0041] exist Figure 4b In the empty position shown, the collecting tray 59 is pivoted into the outlet channel 27 about a pivot point 61 by means of an opening movement 62. The bracket 56 and thus the electromagnet 55 are also pivoted about a pivot point 58 by means of a latch 60. The pivoting movement 63 of the electromagnet 55 causes it to lose contact with the cover plate 53, and the metal component 53 is no longer held on the cover plate 53. Due to gravity, the metal component 53 falls into the collecting tray 59. The spring 57 is tensioned by the pivoting movement 63, which causes the electromagnet 55 to be returned to the operating position by the spring 57 when the opening movement 62 is canceled. In this case, the bracket 56 also returns the collecting tray 59 to the operating position by means of the latch 60. Seals (not shown) may be provided between the collecting tray 59 and the channel wall 52, and between the cover plate 53 and the channel wall 52, to prevent fibers from escaping the outlet channel 27.

[0042] Figures 5a to 5c Schematic diagrams are shown for threading or replacing the corner tack curtain 25. The figures show a machine housing 39 with a rear wall 45 of the ascending conveyor held therein, as well as the drive roller 37 and tension roller 38 of the ascending conveyor, about which the corner tack curtain 25 rotates. An assembly opening 44 is provided in the side of the machine housing 39, and a threading opening 43 is provided in the rear wall 45 of the ascending conveyor. Figure 5a A new rolled-up corner nail curtain 25 is shown, to which a threading aid 46 is fixed at its first end 47. The threading aid 46 can be formed, for example, as a fabric strip or a rope. In a first step, the assembly opening 44 and the threading opening 43 are opened, wherein the threading opening 43 is created by removing a portion of the rear wall 45 of the rising conveyor in the direction of the arrow. Furthermore, the tensioning roller 38 is moved from its operating position to the assembly position 49. The threading aid 46 is then guided through the threading opening 43 over the drive roller 37. Figure 5b As shown, by the micro-operation 50 of the drive roller 37, the corner tack curtain 25 is now pulled up by the threading aid 46, passes through the threading opening 43, passes over the drive roller 37 in the direction of the arrow, and is brought together with the first end 47 to the assembly opening 44. The corner tack curtain 25 is firmly held in the assembly opening 44 by the fixing member 51. Figure 5c The replacement is shown as complete. In this case, the second end 48 of the corner tack curtain 25 is also passed in the direction of the arrow under the tensioning roller 38 into the area of ​​the assembly opening and connected to the first end 47. The threading aid 46 is removed, and the tensioning roller 38 is moved from the assembly position 49 to the operating position. Subsequently, the rear conveyor wall 45 is raised again by closing the threading opening 43 and the assembly opening 44.

[0043] The invention is not limited to the embodiments shown and described. Modifications and combinations of features are also possible within the scope of the claims, even if these are shown and described in different embodiments.

[0044] legend

[0045] 1Spinning preparation machine

[0046] 2-5 vertical shaft

[0047] 6 Fiber material inlet

[0048] 7 Fiber-air mixture

[0049] 8 Conveying air outlet

[0050] 9 Transmission air

[0051] 10 Allocation Channels

[0052] 11. Perforated elements

[0053] 12 Upper distribution channel wall

[0054] 15-16 side shaft wall

[0055] 17-19 Shaft partition wall

[0056] 20 Deflectors

[0057] 21-22 shaft outer wall

[0058] 23 conveyor belt

[0059] 24 Conveyor belt transmission direction

[0060] 25 Corner nail curtain

[0061] 26. Transmission direction of corner nail curtain

[0062] 27 Exit Channel

[0063] 28 Fiber material exports

[0064] 29 areas

[0065] 30 Area Height

[0066] 31 Width

[0067] 32 Distance

[0068] 33 Cleaning Elements

[0069] 34 Connector

[0070] 35 deflection roller

[0071] 36 guide platform

[0072] 37 drive roller

[0073] 38 tension roller

[0074] 39 Machine housing

[0075] 40 belts

[0076] 41 needle strips

[0077] 42 pins

[0078] 43 threading opening

[0079] 44 Assembly opening

[0080] 45 Rising conveyor rear wall

[0081] 46 Threading Aid

[0082] 47 First end of the corner nail curtain

[0083] 48 Second end of the corner nail curtain

[0084] 49 Assembly position of tension roller

[0085] 50 micro-operation

[0086] 51 Fixing parts

[0087] 52 Shaft Wall

[0088] 53 metal parts

[0089] 54 Cover

[0090] 55 electromagnet

[0091] 56 bracket

[0092] 57 Spring

[0093] 58 Electromagnet's rotation point

[0094] 59 Collection Plate

[0095] 60 levers

[0096] 61 Rotation point of the collection plate

[0097] 62 Open Movement

[0098] 63 Pivot Movement

Claims

1. A spinning preparation machine (1) for mixed fibers, comprising a fiber material inlet (6), at least three shafts (2, 3, 4, 5), a conveyor belt (23) and a corner nail curtain (25), wherein: The conveyor belt (23) is arranged below the shaft (2, 3, 4, 5) for removing fiber material from the shaft (2, 3, 4, 5), and the corner nail curtain (25) is configured as a rising conveyor next to the conveyor belt (23), and wherein the conveyor belt (23) and the corner nail curtain (25) have a width (31) transverse to the conveying direction (25, 26), characterized in that shaft walls (2, 3, 4, 5) are arranged on both sides of the conveyor belt (23) and the corner nail curtain (25), wherein the shaft walls (2, 3, 4, 5) have a distance (32) from each other, which distance is 20 mm to 100 mm smaller than the width (31) of the conveyor belt (23) and the corner nail curtain (25) at least in the area (30) of the conveyor belt (23) and the corner nail curtain (25).

2. The spinning preparation machine (1) according to claim 1, characterized in that The conveyor belt (23) has a cleaning element (33) at the end facing the corner nail curtain (25).

3. The spinning preparation machine (1) according to claim 2, characterized in that The cleaning element (33) is a scraper or a brush.

4. The spinning preparation machine (1) according to at least one of the preceding claims, characterized in that The conveyor belt (23) is configured as an endless belt with a releasable coupling (34).

5. Spinning preparation machine (1) according to at least one of the preceding claims, characterized in that The corner nail curtain (25) is formed by a plurality of pin strips (41) which are held on a strip (40) having the same width (31) as the corner nail curtain (25) by screw or rivet connections.

6. The spinning preparation machine (1) according to claim 5, characterized in that In the new state, the corner nail curtain (25) has a threading aid (46) in the form of a belt or a strip.

7. Spinning preparation machine (1) according to at least one of the preceding claims, characterized in that A magnetic separator is connected downstream of the corner nail curtain (25).

8. The spinning preparation machine (1) according to claim 7, characterized in that The magnetic separator comprises an electromagnet (55) and a collecting tray (59) arranged below the electromagnet.

9. The spinning preparation machine (1) according to claim 8, characterized in that The collecting tray (59) is accessible from outside the spinning preparation machine (1) for emptying.

10. A method for assembling a corner nail curtain (25) in a spinning preparation machine (1), the spinning preparation machine (1) being configured as a shaft mixer, having an ascending conveyor, a machine housing (39) and a controller, wherein: The ascending conveyor is configured as a corner nail curtain (25) and comprises an upper driving roller (37) and a lower tensioning roller (38), and the corner nail curtain (25) is configured as an annular corner nail curtain, which is composed of a plurality of needle strips (41) held on a belt (40), the annular corner nail curtain is configured circumferentially around the driving roller (37) and the tensioning roller (38), and a threading auxiliary device (46) is provided at the first end in a new state, and a threading opening (43) and an assembly opening (44) are provided in the machine housing (39), characterized in that the controller displays the following working steps on the display and inquires about their execution status: a) Open the threading opening (43) and the side assembly opening (43) b) lifting the tension roller (38) to the assembly position (49) c) passing the threading aid (46) of the corner nail curtain (25) through the threading opening (43) in the machine housing (39) and passing the threading aid (46) around the drive roller (37) d) enabling the driving roller (38) to be fine-moved (50) in the opposite direction of the operating rotation direction e) further pulling the threading aid (46) or the corner nail curtain (25) by means of the driving roller (37) until the corner nail curtain (25) reaches the assembly opening (44) f) fixing the first end (47) of the corner nail curtain (25) in the assembly opening (44) g) preventing the micro-operation (50) by the controller h) Remove the threading aid (46) i) inserting the second end (48) of the corner nail curtain (25) through the assembly opening (44) j) Connecting the two ends (47, 48) of the corner nail curtain (25) by inserting the missing pin strip (41) k) Lower the tensioning roller (38) to the operating position 1) Closing the assembly opening (44) and the threading opening (43) m) normal operation is achieved through the controller.

Images