Sliver storage device and method for forming a sliver storage device

Abstract

The present invention relates to a sliver receiving device for feeding sliver coming from a drafting device to a yarn-forming element of a spinning device, an air spinning device, and a method for forming a sliver receiving device for feeding sliver coming from a drafting device to a yarn-forming element of a spinning device. The sliver receiving device has a base body with an inlet opening for receiving the sliver fed from the drafting device, and a sliver guide device arranged downstream of the inlet opening for feeding the sliver in a defined manner to the yarn-forming element. To provide a sliver storage device for supplying sliver coming from a draft device to a yarn-forming element of a spinning device, an air spinning device, and a method for forming a sliver storage device, which allows the spinning process to be performed with high precision and efficiency, reduces contamination of the device by fibers peeled off during operation, and at the same time allows the device to be manufactured and assembled particularly simply, inexpensively, and without defects, the invention provides that the sliver guide device is formed from a single needle, which is integrally formed with the base, or that the sliver guide device is formed from two needles arranged side by side, both needles at least partially projecting into a blow air nozzle section, which is integrally formed with the base, for forming a rotating air flow.

Description

Technical Field

[0001] The present invention relates to a sliver storage device for supplying a sliver arriving from a drafting device to a yarn forming element of a spinning device, an air spinning device provided with the sliver storage device, and a method for forming a sliver storage device for supplying a sliver arriving from a drafting device to a yarn forming element of a spinning device.

[0002] Sliver storage devices for spinning devices, particularly for air spinning devices, are known from the prior art in various configurations and are typically used to control a sliver arriving from a drafting device and supply it to a yarn forming element having a spinning nozzle or spinning nozzles. In this case, the sliver storage device is typically formed from a plurality of components made of various different materials. In particular, typically, a sliver guiding device is arranged in a base body and a blowing air nozzle is arranged following in the sliver running direction.

[0003] Air spinning devices are known, for example, from German Patent Application Publication No. 102008006379, and in this known air spinning device, the sliver storage device is formed from a plurality of components. In this air spinning device, based on the fluid flow used for spinning, on the one hand, to convey the sliver and on the other hand, to spin the sliver using spinning compressed air to form a yarn, a particularly precise and tight connection must be formed between the individual components. As a result, it has extremely small component errors, is particularly laborious and requires expensive manufacturing, and furthermore, the assembly of the spinning device is particularly complex.

[0004] In addition to the problem of having to tightly bond components to avoid fluid leakage, conventional devices also have the drawback that sliver fibers are captured at the separation points of individual components and detached from the sliver as they are transported from the drafting device through the sliver receiving device to the spinning nozzle. This results in a reduction in the amount of fibers that can be spun into yarn, and consequently, low efficiency of the device, and on the other hand, an accumulation of detached fibers in the yarn-forming element area, which worsens the spinning results and impairs the functionality of the device.

[0005] Therefore, the fundamental problem of the present invention is to provide a sliver receiving device, an air spinning device, and a method for forming a sliver receiving device for supplying sliver arriving from a drafting device to the yarn forming element of a spinning device, which enables the spinning process to be carried out with high precision and efficiency, reduces contamination of the device by detached fibers during operation, and allows the device to be manufactured and assembled in a particularly simple, inexpensive, and defect-free manner.

[0006] This problem is solved according to the present invention by the sliver housing apparatus described in claim 1, the air spinning apparatus described in claim 9, and the method for forming the sliver housing apparatus described in claim 11. Advantageous improvements of the present invention are described in the dependent claims.

[0007] The present invention provides a sliver receiving device for supplying sliver arriving from a drafting device to a yarn forming element of a spinning machine, comprising a base having an inlet opening for receiving sliver supplied from the drafting device, and a sliver guide device positioned downstream of the inlet opening along the sliver receiving direction for defining and supplying sliver to the yarn forming element, wherein the sliver guide device has a single needle which is integrally formed with the base, or the sliver guide device is formed from two needles arranged side by side, the needle tip of which at least partially protrudes into a blow air nozzle section integrally formed with the base for forming a rotating airflow, or is provided upstream of the blow air nozzle section from the direction of the inlet opening.

[0008] Furthermore, the present invention relates to a spinning apparatus equipped with a spinning nozzle having a spinning cone, and more particularly to an air spinning apparatus, wherein the sliver housing device according to the present invention is arranged upstream of the spinning cone or upstream of the spinning nozzle along the sliver housing direction.

[0009] In a method according to the present invention for forming a sliver housing for supplying sliver arriving from a drafting device to the yarn-forming element of a spinning machine, a sliver guide device for defining and supplying sliver to the yarn-forming element, formed from a single needle located downstream of the inlet opening, is formed integrally with the base of the sliver housing, or alternatively, in a sliver guide device formed from two adjacent needles located downstream of the inlet opening, a blow air nozzle section for forming a rotating airflow within the spinning machine is formed integrally with the base of the sliver housing.

[0010] The sliver housing device according to the present invention, in an advantageous form, enables faster, more defect-free, and more accurate production of yarn from sliver, particularly based on the more precise and separation-free structure of the sliver housing device. Furthermore, there is no risk of non-sealing due to separation and connection points between the base of the sliver housing device and at least one needle and / or blow air nozzle section. Finally, it enables particularly simple, inexpensive, and defect-free manufacturing and assembly.

[0011] A sliver housing is, first and foremost, a component or group of components that controls sliver arriving from a fibrous material, particularly a drafting device, and supplies it to a spinning nozzle, particularly a spinning cone, or any other yarn-forming element. In this case, the sliver housing may be formed as a group of components consisting of multiple parts, or as a single component formed integrally, and may be formed from any material. Preferably, the sliver housing is fixed directly to the spinning machine, particularly to the outer housing of the spinning machine.

[0012] The yarn-forming element may be any functional unit or component consisting of one or more components. The yarn-forming element is provided for forming yarn from individual fibers, and in particular from sliver. Preferably, the yarn-forming element includes a spinning nozzle, in particular an air-spinning nozzle, and in particular preferably the yarn-forming element has a spinning cone of the air-spinning nozzle. Accordingly, the spinning apparatus is preferably an air-spinning apparatus, in which the sliver is vortexed in the region of the spinning cone, and in particular the region between the end of the sliver guide device and the spinning cone, by a rotating spinning compressed air stream or blown air stream so as to form yarn.

[0013] The sliver housing has a base to which all other structural and component members of the sliver housing are arranged, fixed, and / or integrally molded. Preferably, the base is integrally formed. To accommodate the sliver, the base has an inlet opening according to the present invention through which the sliver is guided and travels. Preferably, the inlet opening surrounds the sliver all around. The inlet opening may be located precisely in the center, or in the region of the central longitudinal axis of the sliver housing, or it may be offset from the center and / or angled. However, particularly preferably, the inlet opening extends parallel to the central longitudinal axis of the sliver housing, and very particularly preferably precisely on the central longitudinal axis. Similarly preferably, the shape and / or diameter of the inlet opening are selected so that the sliver can be guided and travels all around and / or can contact the surface of the inlet opening all around.

[0014] According to the present invention, the sliver guide device is provided to guide the sliver, which has been guided into the sliver housing device through the inlet opening, to the yarn-forming element, at least partially controlled or defined. Preferably, the sliver guide device also acts as a twist-preventing device, which prevents the entire fiber of the sliver from being vortexed in the blow air nozzle section. More preferably, the sliver guide device allows only the fiber ends protruding from the sliver to be wrapped around the fibers inside the sliver. For this purpose, the sliver arriving in the sliver housing device, particularly preferably from a drafting device, is supplied to the sliver housing device, particularly through the inlet opening and / or directly via the sliver table.

[0015] According to the present invention, the sliver guide device is positioned downstream of the inlet opening along the sliver housing direction, that is, the sliver guide device is positioned following the inlet opening in the sliver transport direction and / or inside the sliver housing device.

[0016] The sliver guide device may be optionally formed to partially guide the sliver. In this case, the sliver housing is preferably formed integrally, i.e., as a one-piece unit, or formed from two integral needles. More preferably, the sliver guide device is entirely part of the substrate and / or formed integrally with the substrate. Similarly preferably, the sliver guide device protrudes from the substrate on one side, particularly on the side opposite the inlet opening, and / or extends into the blow air nozzle section up to the front of the blow air nozzle section.

[0017] The sliver guide device is preferably positioned at least partially in front of or within the blow air nozzle section, thereby guiding the sliver at least partially within the blow air nozzle section and / or protecting it from complete capture and vortexing. Particularly preferably, the tips of the sliver guide device, in particular the tips of one or more needles, are positioned directly in front of or within the opening of the air spinning nozzle, and especially within the opening of the spinning cone of the air spinning nozzle.

[0018] The sliver guide device may be formed as a single needle and / or having separate tips. In this case, the single needle is preferably formed rotationally symmetrically over its entire length, in the region of its tip, and more preferably substantially over its entire length. More preferably, the single needle is positioned along the central longitudinal axis of the inlet opening, on the central longitudinal axis, or on an extension of this central longitudinal axis. According to the present invention, at least one needle is formed integrally with the substrate.

[0019] However, the sliver guide device may be formed as two needles or tips arranged at least partially side by side. These two needles preferably form a tweezers unit. Most preferably, the sliver housing device is a tweezers nozzle, in which two needles, particularly preferably arranged side by side and identical to each other, form tweezers. However, the two needles of the sliver guide device may basically be formed of different shapes from each other.

[0020] Preferably, two needles arranged side by side are integrally formed, particularly preferably integrally with the substrate. More preferably, the two needles are arranged parallel to each other and / or have equal lengths. Similarly preferably, both needles are arranged at equal intervals with respect to the central longitudinal axis of the inlet opening, or with respect to an extension of the central longitudinal axis of the inlet opening, and / or opposite with respect to the central longitudinal axis.

[0021] The blow air nozzle section may be formed by a proprietary component or another component, particularly a part of the base of the yarn storage device. In this case, the blow air nozzle section is located downstream of the section having the inlet opening of the sliver storage device in the sliver travel direction and / or is provided for supplying spinning compressed air. Preferably, the blow air nozzle section of the sliver guide unit is also formed integrally with the base by a single needle.

[0022] The blow air nozzle section is preferably formed as a nozzle block having at least one, preferably more than one blow air nozzle. Particularly preferably, the nozzle block has a closed outer peripheral section surrounding at least one blow air nozzle, and most preferably, the nozzle block is cylindrical. Even more preferably, the multiple blow air nozzles are distributed around the entire circumference of the blow air nozzle section, particularly the nozzle block. In this case, most preferably, the blow air nozzles are distributed along the circumferential surface at equal intervals from one another.

[0023] In the blow air nozzle section, the blow air nozzle is preferably positioned tangentially toward the spinning cone in the region of the inlet opening of the spinning nozzle, thereby generating a rotating airflow. More preferably, the positioning of the blow air nozzle is selected so that the airflow collides with the inner surface of the expansion casing surrounding the spinning cone in a plane axially spaced apart from the plane of the inlet opening.

[0024] In a preferred configuration of the sliver housing device according to the present invention, at least the base and the sliver guide device are formed from the same material, and particularly preferably the blow air nozzle section is formed from the same material as the base and / or the sliver guide device, thereby enabling a configuration without separation points and joints, particularly in terms of simple manufacturing.

[0025] The sliver housing may be made of any material, but the entire sliver housing is preferably formed from ceramic. This allows for a particularly good guide for the sliver and a surface that is particularly free of separation and joining points, in a simple form. Another configuration of the sliver housing according to the present invention specifies that the sliver housing has a ceramic coating on at least all surface sections that guide the fibers, thereby providing a particularly smooth, stable, and resistant surface. Particularly preferably, at least the surface of the needle and / or sliver table has a ceramic coating. Particularly preferably, the entire sliver housing has a ceramic coating. Particularly preferably, if the sliver housing is made from plastic or metal, the sliver housing or at least a portion of the sliver housing has a ceramic coating.

[0026] According to one preferred modification of the sliver housing, both needles are formed and / or arranged mirror-symmetrically with respect to each other. The two needles may be arranged simultaneously or alternatively rotationally and / or mirror-symmetrically with respect to the inlet opening or the longitudinal axis of the center of the inlet opening. Such positioning is particularly preferred when the two needles are not formed rotationally symmetrically, thereby the surface of each needle is adapted to its function and arrangement. The entire needle does not have to be formed rotationally symmetrically, or only one portion of the needle, in particular one portion of the needle adjacent to the substrate or sliver table, does not have to be formed rotationally symmetrically.

[0027] According to one preferred configuration of the sliver housing according to the present invention, a sliver table is positioned between an inlet opening and a sliver guide device, and a sliver is guided through this sliver table, or is guided in the operating state of the sliver housing. The sliver table preferably has a closed, uninterrupted surface. Preferably, the needle protrudes beyond the sliver table, and particularly preferably, the sliver housing has no connection points between its components, particularly in the region of the sliver table and / or the transition region to the needle. Most preferably, the overall inner contour and particularly the surface of the sliver table and / or needle are formed without edges and / or angles. Particularly preferably, the sliver housing has a continuous transition surface between the base and the needle. The surface of the sliver table may indeed be basically arbitrary in configuration, but preferably the surface of the sliver table also has no edges, and particularly preferably, the inner contour or the surface configuration of the sliver table is partially or completely helical and / or concave and / or convex.

[0028] An advantageous improvement to the pneumatic spinning machine is that the sliver guide device of the sliver housing is at least partially protruding into the blow air nozzle section and / or partially protruding into the opening of the spinning cone, thereby achieving sufficient vortexing of the fiber end for yarn formation and particularly precise guidance. Alternatively, the sliver guide device may terminate immediately before the spinning cone in the blow air nozzle section.

[0029] In a first advantageous refinement of the method according to the invention, the sliver storage device is formed by an additive manufacturing method, which enables the production of a sliver storage device having a complex shape in a simple form. Furthermore, by means of the additive manufacturing method, separation points and connection points can be reliably avoided. Possible additive manufacturing methods can be, for example, 3D printing, selective laser melting (SLM), electron beam melting (EBM), binder jetting (BJ), fused deposition modeling (FDM), or laser sintering, particularly laser sintering using materials consisting of metal in each case. Additionally, it is also possible to sinter the pieces of material subsequently or alternatively.

[0030] A method in which the sliver storage device is formed from ceramic and / or using stereolithography (SL) is particularly preferred. In contrast, if it is desirable to form the sliver storage device from metal, production using laser sintering, particularly selective laser sintering (SLS), is preferred. However, alternatively, the sliver storage device can also be formed in another form, particularly from metal, and then sintered. Furthermore, it is possible to form the sliver storage device by joining at least two parts, particularly the base body and the blow air nozzle section, to each other without separation points and / or in a material-bonded manner by sintering or in another form.

[0031] A plurality of embodiments of the sliver storage device and parts of the sliver storage device according to the invention will be described in detail below in connection with the drawings.

Brief Description of the Drawings

[0032] [Figure 1] It is a cross-sectional view showing a region of an air spinning device provided with a first embodiment of the sliver storage device. [Figure 2] It is a cross-sectional view showing a region of an air spinning device provided with a second embodiment of the sliver storage device. [Figure 3a] It is an enlarged cross-sectional view showing the sliver storage device illustrated in FIG. 1 and provided with a blow air nozzle section. [Figure 3b] It is a perspective view showing the outer surface of the sliver storage device illustrated in FIG. 3a. [Figure 4a] Figure 3 is a perspective view showing the outer surface of the sliver housing device shown in the diagram. [Figure 4b] Figure 3 is a perspective view showing the outer surface of the sliver housing device, rotated relative to Figure 4a. [Figure 4c] Figure 4a is a plan view showing the sliver housing device as seen from the perspective of the sliver guide device.

[0033] The sliver housing device 1 shown in Figure 1 has an integrated, or one-piece, base body 4 and is positioned inside the air spinning machine, facing the yarn forming element 2 of the air spinning machine. The yarn forming element 2 has a spinning nozzle 10 equipped with a spinning cone 9.

[0034] The sliver housing device 1 has an inlet opening 3 through which slivers arriving from the drafting device can be supplied to the sliver housing device 1. The surface of the sliver housing device 1 is formed as a sliver table 8 following the inlet opening 3 in the direction of sliver transport, and the slivers are supplied to the sliver guide device 5 via this sliver table 8.

[0035] The sliver guide device 5 has the function of controlling and defining the sliver and supplying it to the yarn forming element 2. Furthermore, the sliver guide device 5 acts as a twist-preventing device that prevents the entire sliver, or at least a large proportion of the sliver, from being vortexed during the air spinning process. In this case, the sliver guide device 5 is formed as a tweezers nozzle consisting of two needles 6a and 6b arranged parallel to each other, and the needles 6a and 6b are each integrally formed with the base body 4 and extend from the sliver table 8 in the direction of the spinning cone 9.

[0036] A blow air nozzle section 7 is provided to enable the sliver to be spun into yarn. This blow air nozzle section 7 is integrally formed with the base body 4 and is located in the region of the yarn-forming element 2 (see Figure 3b). Both needles 6a and 6b of the sliver guide device 5 partially extend into the blow air nozzle section 7, so that the free trailing ends of the edge fibers of the sliver are exposed to the airflow flowing out of the blow air nozzle 12 within the blow air nozzle section 7 after leaving the sliver guide device 5, and these free ends are lifted or detached from the sliver.

[0037] At the same time, the leading end of the fiber is not usually completely detached because it has already been captured by the wrapped fiber and introduced into the spinning nozzle 10. The free fiber end detached from the sliver is wrapped around and rotated around the spinning cone 9 by the rotating airflow generated by the blow air nozzle 12. The continuous movement of the sliver in the sliver transport direction continuously draws the rear free end of the fiber into the opening 11 of the spinning nozzle 10. The edge fiber is spirally wrapped around the core fiber of the sliver.

[0038] However, in this process, not all fibers and fiber ends detached from the sliver are spun to form yarn; therefore, these detached fibers can be easily captured at the edges and separation points between the components of the sliver housing device 1. Accordingly, an integrated configuration of the sliver housing device 1 is advantageous. Furthermore, the integrated configuration eliminates non-sealing between the components, which allows for more precise formation of the rotating airflow in the blow air nozzle section 7.

[0039] The sliver guide device 5 is formed from two needles 6a and 6b that are identical and parallel to each other and are positioned in the region of the sliver table 8 on both sides of the inlet opening 3 (see Figure 3a). In this case, the tips of the needles 6a and 6b are each positioned in the region of the outflow opening of the blow air nozzle 12 in the blow air nozzle section 7. Both needles 6a and 6b have a shape that is not rotationally symmetrical along their entire length, and in this case, they are particularly flattened in the surface sections facing the opposing needles 6a and 6b.

[0040] As illustrated in Figure 4, both needles 6a and 6b are continuously connected to the surface of the sliver table 8. The two needles 6a and 6b are positioned opposite each other in a mirror-image symmetrical manner. The sliver table 8 has a curved, edgeless surface.

[0041] The second configuration of the sliver housing device 1, as shown in Figure 2, differs significantly from the first configuration shown in Figure 1. On the one hand, the blow air nozzle section 7, which includes the blow air nozzle 12, is not integrally formed with the base body 4, and on the other hand, the sliver guide device 5 is arranged throughout the entire blow air nozzle section 7 and is formed from a single needle 6 that extends into the opening 11 of the spinning nozzle 10. Furthermore, the inlet opening 3 is offset from and parallel to the central longitudinal axis of the base body 4, while the needle 6 extends along this central longitudinal axis. [Explanation of Symbols]

[0042] 1. Sliver containment device 2 thread-forming elements 3 Entrance opening 4 Base 5. Sliver guide device 6. Single needle 6a First needle 6b Second Needle 7. Blow air nozzle classification 8 sliver tables 9. Spinning cone 10 Spinning nozzles 11 Aperture 12. Blow air nozzle

Claims

1. A sliver receiving device (1) for feeding sliver coming from a drafting device to a yarn forming element (2) of a spinning device, comprising: a base body (4) having an inlet opening (3) for receiving the sliver fed from the drafting device; a sliver guide device (5) arranged downstream of the inlet opening (3) along the sliver receiving direction (1) for feeding the sliver in a defined manner to the yarn forming element (2); In a sliver storage device (1) comprising: The sliver guide device (5) has a single needle (6), which is integrally formed with the base body (4), or The sliver guide device (5) is formed from two needles (6a, 6b) arranged side by side, and the needle tips of the needles (6a, 6b) at least partially extend into a blow air nozzle section (7) formed integrally with the base body (4) for forming a rotating air flow, or are provided upstream of the blow air nozzle section (7) from the direction of the inlet opening (3).

2. 2. The sliver receiving device (1) according to claim 1, wherein at least the base body (4) and the sliver guide device (5) are made of the same material.

3. 3. The sliver receiving device (1) according to claim 1 or 2, wherein the blow air nozzle section (7) is made from the same material as the base body (4) or the sliver guiding device (5).

4. 4. The sliver receiving device (1) according to claim 1, wherein the sliver receiving device (1) is made of ceramic.

5. 4. The sliver receiving device (1) according to claim 1, wherein the sliver receiving device (1) has a ceramic coating at least on all surface sections that guide the fibers.

6. 6. The sliver receiving device (1) according to claim 1, wherein the two needles (6a, 6b) are configured and / or arranged mirror-images of each other.

7. 7. The sliver receiving device (1) according to claim 1, wherein the two needles (6a, 6b) do not each have a rotationally symmetrical shape.

8. A sliver storage device (1) according to at least one of claims 1 to 7, wherein a sliver table (8) is arranged between the inlet opening (3) and the sliver guide device (5), through which the sliver can be guided, and wherein the sliver table (8) has a closed, uninterrupted surface.

9. An air spinning device comprising a spinning nozzle (10) having a spinning cone (9), 9. An air spinning device, characterized in that a sliver receiving device (1) according to at least one of claims 1 to 8 is arranged upstream of the spinning cone (9) along the sliver receiving direction.

10. 10. The air spinning device according to claim 9, wherein the sliver guide device (5) of the sliver receiving device (1) extends at least partially into the blow air nozzle section (7) and / or partially into the opening (11) of the spinning cone (9).

11. 10. A method for producing a sliver receiving device (1) for feeding a sliver coming from a drafting device to a yarn-forming element (2) of a spinning device, in particular according to any one of claims 1 to 8, comprising:

1. A method for producing a sliver guide device (5) for feeding the sliver to the yarn-forming element (2) in a defined manner, the sliver guide device (5) being formed from one needle (6) and arranged downstream of the inlet opening (3) and integrally formed with the base body (4) of the sliver storage device (1); or 2. A method for producing a sliver guide device (5) being formed from two adjacent needles (6a, 6b) and arranged downstream of the inlet opening (3), the method comprising forming a blow air nozzle section (7) for producing a rotating air flow in the spinning device in a sliver guide device (5) being integrally formed with the base body (4) of the sliver storage device (1).

12. 12. The method according to claim 11, wherein the sliver containing device (1) is formed by additive manufacturing.

13. 13. Method according to claim 11 or 12, characterized in that the sliver receiving device (1) is made from ceramic and by means of stereolithography.

14. 13. Method according to claim 11 or 12, characterized in that the sliver receiving device (1) is made from metal by laser sintering.

Images