Rotor spinning machine hard waste and impurity separation device and method

Abstract

The invention relates to a device and a method for separating hard waste and impurities of a rotor spinner. The device comprises a first independent collection box body and a second independent collection box body which are respectively arranged at negative pressure ports of a headstock and a tailstock; a steel wire mesh filtering layer is arranged in the first box body and used for intercepting impurities, and the second box body is used for collecting waste tobacco shreds; the two box bodies are of a steel plate and steel wire mesh composite structure and are embedded into the original space of equipment through drilling screws, and zero space occupation is achieved. The method comprises the steps that in the spinning process, impurity-containing hard waste enters the first box body through the negative pressure channel to filter impurities, then the hard waste enters the second box body, and finally the hard waste is cleaned and packaged respectively. The device is simple in structure and convenient to mount, can realize effective separation of the waste tobacco shreds and impurities without changing a main machine, and remarkably reduces waste of raw materials.

Description

Technical Field

[0001] This invention relates to the field of textile machinery technology, and in particular to a device and method for separating yarn return and impurities in an air-jet spinning machine. Background Technology

[0002] In the field of air-jet spinning machines, the German A8 fully automatic model, as the mainstream equipment, has long suffered from a design flaw in its waste removal system: it uses a single negative pressure channel to mix the recycled fibers (recyclable fibers) stripped by the cleaning brush with impurities (dust, seed hulls, etc.) and transport them to the waste collection box at the rear of the machine, resulting in the inability to separate fibers from impurities. This mixed collection mode causes a double waste of resources—on the one hand, about 42% of recyclable fibers lose their reuse value due to impurity contamination; on the other hand, the mixing of impurities with fibers increases subsequent processing costs. Despite various attempts by the industry to improve the machine, such as adding centrifuges or external screens, these solutions have proven impractical due to the stringent internal space constraints, vibration sensitivity, and compatibility requirements of the German A8 model. Specifically, centrifugal separation causes vibration levels to exceed limits, reaching 5.3 mm / s, resulting in a 40% reduction in bearing life. External filters, with a minimum thickness exceeding 50 mm, are forced to be installed externally, violating safety passage width standards (<0.8 m) in textile workshops. Adjustable negative pressure solutions require increasing the system negative pressure from -0.9 kPa to -1.5 kPa, leading to a 15% increase in energy consumption and a rise in fiber breakage. This triple constraint of space, vibration, and energy limitations has prevented the A8 model from achieving efficient separation of micron-level impurities (<120 μm) within limited modification space, ultimately forcing most air-jet spinning machines worldwide to endure both raw material waste and high processing costs.

[0003] Current air-jet spinning machines generally employ a mixed collection method, discharging waste yarn and impurities through the same negative pressure channel into the waste bin at the rear of the machine. This method has the following drawbacks: recyclable fibers and impurities cannot be separated, resulting in raw material waste; subsequent sorting and processing costs are high, affecting production efficiency. For a long time, the industry has lacked a simple, low-cost, and easy-to-implement solution.

[0004] Therefore, it is evident that the existing devices and methods for separating yarn recycle and impurities in air-jet spinning machines still have inconveniences and defects in terms of method, manufacturing method, and use, and urgently need further improvement. To solve the problems existing in the devices and methods for separating yarn recycle and impurities in air-jet spinning machines, relevant manufacturers have spared no effort in seeking solutions, but for a long time, no suitable design has been developed. Furthermore, there are no suitable methods, manufacturing methods, or structures in general methods and devices / methods for separating yarn recycle and impurities in air-jet spinning machines that can solve the aforementioned problems. This is clearly a problem that relevant industries urgently want to solve.

[0005] In view of the shortcomings of existing devices and methods for separating yarn recycle and impurities in air-jet spinning machines, the inventor, based on years of practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with theoretical research, actively researched and innovated to create a new device and method for separating yarn recycle and impurities in air-jet spinning machines. This new device and method can improve upon existing ones, making them more practical. After continuous research, design, and repeated trials and improvements, this invention, which has proven to be of practical value, has finally been created. Summary of the Invention

[0006] The main objective of this invention is to overcome the shortcomings of existing air-jet spinning machine refrigerant and impurity separation devices and methods, and to provide a new air-jet spinning machine refrigerant and impurity separation device and method. The technical problem to be solved is to achieve efficient online separation of refrigerant and impurities without changing the main machine structure or increasing additional energy consumption, so as to be more practical and have industrial application value.

[0007] Another objective of this invention is to provide a device and method for separating recycled yarn and impurities in an air-jet spinning machine. The technical problem to be solved is that the device reduces the impurity content of recycled yarn to ≤1% through a dual-channel, dual-box design, which can be directly reused in the spinning process, reducing raw material waste and making it more suitable for practical use.

[0008] Another objective of this invention is to provide a device and method for separating recycle yarn and impurities in an air-jet spinning machine. The technical problem to be solved is to enable the machine to be quickly upgraded and operated stably for a long time by utilizing a zero-space-occupancy design and an anti-loosening fixing method, thereby reducing maintenance costs and making it more suitable for practical use.

[0009] Another objective of this invention is to provide a device and method for separating filament return and impurities in an air-jet spinning machine. The technical problem to be solved is to extend the single cleaning cycle to ≥8 hours, reduce the labor intensity of machine operators and downtime losses, and improve the overall production efficiency of the equipment, thereby making it more suitable for practical use.

[0010] The objective of this invention and the technical problem it solves are achieved through the following technical solution. The air-jet spinning machine recycle and impurity separation device according to this invention includes:

[0011] The first collection box, located at the negative pressure port at the front of the vehicle, has a fixed wire mesh filter layer inside, which is used to intercept and collect impurities.

[0012] The second collection box, located at the negative pressure port at the rear of the vehicle, is used to collect the waste filaments filtered by the first collection box.

[0013] Both the first and second collection boxes are composite structures of steel plates and wire mesh, and are fixed to the original space inside the air-jet spinning machine by drilling holes and screws, achieving zero space occupation.

[0014] The objectives of this invention and the technical problems it addresses can be further achieved by the following technical measures.

[0015] The aforementioned air-jet spinning machine waste yarn and impurity separation device, wherein the inlet end of the first collection box is provided with a guide plate to evenly disperse the waste yarn containing impurities and reduce the impact on the wire mesh filter layer; the bottom of the first collection box is provided with a pull-out impurity box, the bottom plate of the impurity box is a perforated plate with a hole diameter of less than 1mm, for secondary filtration and easy collection and cleaning of impurities.

[0016] The objective of this invention and the technical problem it solves are further achieved by the following technical solution. The method for separating reclaimed yarn and impurities in an air-jet spinning machine according to this invention includes the following steps:

[0017] a. Fix the first collection box to the negative pressure port at the front of the vehicle, and fix the second collection box to the negative pressure port at the rear of the vehicle;

[0018] b. During the spinning process, the waste yarn containing impurities first enters the first collection box under negative pressure. The impurities are intercepted by the wire mesh filter layer and fall into the impurity box. The filtered waste yarn continues to enter the second collection box.

[0019] c. Monitor the collection volume through the observation window. When the impurity box or the second collection box reaches the preset capacity, stop the machine and remove the impurity box and open the top plate for cleaning.

[0020] d. Pack the cleaned-out impurities as waste and recycle the recycled yarn after packaging.

[0021] The objectives of this invention and the technical problems it addresses can be further achieved by the following technical measures.

[0022] In the aforementioned method for separating spun yarn and impurities in an air-jet spinning machine, in step b, the negative pressure in the second collection box is increased by 1–2 kPa compared to the negative pressure in the first collection box by adjusting the opening of the negative pressure valve at the rear of the machine, so as to promote the rapid entry of spun yarn into the second collection box and reduce the residence time in the first collection box; in step c, the cleaning cycle is set to 8 hours, and a scale line is set on the observation window. When the accumulation height reaches the scale line, an audible and visual reminder is triggered to prompt the machine operator to clean in time.

[0023] Compared with the prior art, the present invention has significant advantages and beneficial effects. As can be seen from the above technical solution, in order to achieve the aforementioned objectives, the main technical contents of the present invention are as follows:

[0024] This invention proposes a device and method for separating recycle yarn and impurities in an air-jet spinning machine, characterized by comprising:

[0025] The first collection box is located at the negative pressure port at the front of the vehicle, and a wire mesh filter layer is fixed inside to intercept and collect impurities.

[0026] The second collection box is located at the negative pressure port at the rear of the vehicle and is used to collect the waste filaments filtered by the first collection box.

[0027] Connect the steel pipe to link the first collection box with the negative pressure port of the spinning machine;

[0028] Both the first and second collection boxes are composite structures of steel plates and wire mesh, and are fixed to the original space inside the air-jet spinning machine by drilling holes and screws, achieving zero space occupation.

[0029] Preferably, the inlet end of the first collection box is provided with a guide plate to uniformly disperse the impurity-containing return wires and reduce the impact on the wire mesh filter layer.

[0030] Preferably, the bottom of the first collection box is provided with a pull-out impurity box, the bottom plate of which is a perforated plate with a hole diameter of less than 1mm, for secondary filtration and to facilitate the centralized cleaning of impurities.

[0031] Preferably, the top plate of the second collection box is a flip-up quick-release structure, and the inner surface of the top plate is provided with an anti-static coating.

[0032] Preferably, the composite structure of steel plate and wire mesh is welded from a 2mm thick steel plate and a 120-mesh stainless steel wire mesh, wherein the surface of the steel plate is provided with ventilation holes with a diameter of 3-4mm and a center-to-center distance of 8mm.

[0033] Preferably, both the first collection box and the second collection box have transparent observation windows on their side walls for real-time monitoring of the internal collection volume.

[0034] Preferably, the drilled screw is an anti-loosening combination screw, including a hexagonal bolt, a spring washer, and a nylon lock nut, to counteract the vibration generated during the operation of the spinning machine.

[0035] The present invention also provides a method for separating recycled fibers from impurities using the aforementioned device, characterized by comprising the following steps:

[0036] a. Fix the first collection box to the negative pressure port at the front of the vehicle, and fix the second collection box to the negative pressure port at the rear of the vehicle;

[0037] b. During the spinning process, the waste yarn containing impurities first enters the first collection box under negative pressure. The impurities are intercepted by the wire mesh filter layer and fall into the impurity box. The filtered waste yarn is then sucked into the second collection box.

[0038] c. Monitor the collection volume through the observation window. When the impurity box or the second collection box reaches the preset capacity, stop the machine and remove the impurity box and open the top plate for cleaning.

[0039] d. Pack the cleaned-out impurities as waste and recycle the recycled yarn after packaging.

[0040] Preferably, in step b, by adjusting the opening of the negative pressure valve at the rear of the vehicle, the negative pressure in the second collection box is 1 kPa–2 kPa higher than the negative pressure in the first collection box, so as to promote the rapid entry of the recycled wire into the second collection box and reduce the residence time in the first collection box.

[0041] Preferably, the feature is that: in step c, the cleaning cycle is set to 8 hours, and a scale line is set on the observation window. When the accumulation height reaches the scale line, an audio-visual reminder is triggered to prompt the worker to clean in time.

[0042] As described above, this invention provides a device and method for separating filament waste and impurities in an air-jet spinning machine. Through structural innovations such as independent collection via dual channels from the head to the tail, filtration with a 120-mesh steel wire mesh, and zero-space embedded installation, it achieves high-efficiency and low-loss online separation of filament waste and impurities without modifying the main unit or increasing energy consumption.

[0043] By employing the above technical solution, the air-jet spinning machine waste yarn and impurity separation device and method of the present invention have at least the following advantages:

[0044] 1. High separation efficiency: The impurity content of recycled fibers is ≤1%, which can be directly reused, increasing the raw material utilization rate by more than 55%;

[0045] 2. Zero space occupation: All components are embedded in the original space of the equipment, without the need for external rack expansion, and the retrofit of old machines only takes 2 hours;

[0046] 3. Low operating costs: No additional fans or motors are required, resulting in zero extra energy consumption; the cleaning cycle is extended from 2-3 hours to ≥8 hours, saving approximately RMB 16,000 in labor costs per unit per year;

[0047] 4. Stable and reliable structure: The design of anti-loosening combination screws + baffle plate + pull-out impurity box ensures no loosening or blockage after 12 months of continuous operation;

[0048] 5. Environmental Protection and Safety: Impurities are collected separately, and the on-site dust concentration is reduced to ≤1mg / m³. 3 It meets national occupational health standards;

[0049] In summary, the unique device and method for separating waste yarn and impurities in an air-jet spinning machine of this invention effectively solves the long-standing problems of "inability to separate waste yarn and impurities, waste of raw materials, frequent cleaning, and high modification costs" in the prior art. It possesses numerous advantages and practical value, and is truly innovative as no similar design has been publicly disclosed or used in similar methods, manufacturing methods, or processing methods. It represents a significant improvement in method, manufacturing method, processing method, and function, demonstrating substantial technological progress and producing user-friendly and practical results. Furthermore, it offers several enhanced functions compared to existing devices and methods for separating waste yarn and impurities in air-jet spinning machines, making it more suitable for practical application and possessing broad industrial value. It is indeed a novel, progressive, and practical new design.

[0050] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0051] The specific methods, manufacturing methods, and structures of the present invention are given in detail in the following embodiments and accompanying drawings. Attached Figure Description

[0052] Figure 1 Flowchart of the steps for separating recycled yarn and impurities in an air-jet spinning machine. Detailed Implementation

[0053] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation methods, manufacturing methods, steps, structures, features, and effects of the air-jet spinning machine refrigerant and impurity separation device and method proposed according to the present invention.

[0054] Example 1

[0055] 1. First, set up the following device structure.

[0056] First collection box: The outer shell of the box is 260mm long × 200mm wide × 180mm high, made of 2mm thick Q235-A cold-rolled steel plate, bent on all four sides and then welded with CO2 shielded welding; the wire mesh filter layer is 120 mesh (approximately 125μm aperture) 304 stainless steel wire mesh, fixed by spot welding around the perimeter, with an effective filtration area ≥0.045m². 2The deflector is made of 2mm steel plate bent into a "∧" shape with a 60° angle and a top distance of 50mm from the inlet, used to disperse airflow and reduce impact. The pull-out impurity box has a 1mm thick perforated plate base with φ1mm holes, a center distance of 3mm, and 5mm high rolled edges around it. The insert slide is formed by bending 1.5mm steel plate, with a pull-out stroke of 100mm and a handle welded to the outside. An inlet flange is installed to connect with the original φ60 negative pressure pipe clamp at the front of the vehicle, and the sealing gasket is an EPDM foam strip.

[0057] Second collection box: The outer shell dimensions are 300mm (length) × 220mm (width) × 200mm (height). The material and welding method are the same as the first collection box. The quick-release top plate is hinged on one side and fitted with a snap fastener on the other side. The inner surface is coated with a black epoxy antistatic coating (surface resistance 10 ohms). 6 Ω), to prevent wire adhesion; the observation window is a 5mm transparent PC board, embedded in the side wall of the box, with three scale lines: 0, 50%, and 100% capacity; the outlet flange is connected to the original φ60 negative pressure pipe at the rear of the vehicle with clamps.

[0058] The fixing components use drilled screws, specifically an M6×25 hex bolt + φ6 spring washer + M6 nylon lock nut, a total of 8 sets, symmetrically arranged, the mounting hole spacing is consistent with the original hole position of the frame, no need to re-drill holes.

[0059] 2. Install after setting up the structure of each component.

[0060] S1: Shut down the machine and disconnect the power, then close the main negative pressure valve;

[0061] S2: Remove the negative pressure hoses from the front and rear of the vehicle and measure the available space inside the frame;

[0062] S3: Place the first collection box against the inner wall of the frame and tighten it with 4 sets of drilled screws 3;

[0063] S4: Place the original φ60 hose onto the inlet flange and outlet flange respectively, and tighten it with stainless steel clamps;

[0064] S5: Check if the impurity box pushes and pulls smoothly, and the opening angle of the top plate is ≥90°;

[0065] S6: Connect the power supply, start the engine slightly, and when the negative pressure value stabilizes at 21kPa±0.5kPa and there is no abnormal vibration, the installation is complete.

[0066] The entire installation process can be completed by one person in 20 minutes, without the need to weld the frame or modify the circuit.

[0067] 3. Set process parameters

[0068] The negative pressure setting at the front of the machine is 19–21 kPa; the negative pressure at the rear is increased by 1–2 kPa via an adjusting valve to ensure that the recycled yarn passes quickly through the first collection box. An alert is issued when the observation window shows 50%, and cleaning is mandatory when it reaches 100%. Under conditions of 100% Xinjiang long-staple cotton and a machine speed of 160 m / min, the actual cleaning cycle is ≥8 hours. Recycled yarn with impurity content ≤1% and average length ≥18 mm can be directly reused for yarn of the same count; after collection in the impurity box, the moisture content is <8%.

[0069] As can be seen from the above embodiments, the present invention has a simple structure, quick installation, and reliable operation. It can be widely used for upgrading and transforming existing air-jet spinning machines and has significant industrial promotion value.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the methods and techniques disclosed above without departing from the scope of the present invention to create equivalent embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A device for separating reclaimed yarn and impurities in an air-jet spinning machine, characterized in that, include: The first collection box is located at the negative pressure port at the front of the vehicle, and a wire mesh filter layer is fixed inside to intercept and collect impurities. The second collection box is located at the negative pressure port at the rear of the vehicle and is used to collect the waste filaments filtered by the first collection box. Connect the steel pipe to link the first collection box with the negative pressure port of the spinning machine; Both the first and second collection boxes are composite structures of steel plates and wire mesh, and are fixed to the original space inside the air-jet spinning machine by drilling holes and screws, achieving zero space occupation.

2. The air-jet spinning machine waste yarn and impurity separation device according to claim 1, characterized in that: The inlet end of the first collection box is provided with a guide plate to evenly disperse the impurity-containing return wires and reduce the impact on the steel wire mesh filter layer.

3. The air-jet spinning machine waste yarn and impurity separation device according to claim 1, characterized in that: The bottom of the first collection box is provided with a pull-out impurity box. The bottom plate of the impurity box is a perforated plate with a hole diameter of less than 1 mm, which is used for secondary filtration and facilitates the centralized cleaning of impurities.

4. The air-jet spinning machine waste yarn and impurity separation device according to claim 1, characterized in that: The top plate of the second collection box is a flip-up quick-release structure, and the inner surface of the top plate is provided with an anti-static coating.

5. The air-jet spinning machine waste yarn and impurity separation device according to claim 1, characterized in that: The composite structure of steel plate and wire mesh is made of 2mm thick steel plate and 120 mesh stainless steel wire mesh welded together. The surface of the steel plate has ventilation holes with a diameter of 3-4mm and a center-to-center distance of 8mm.

6. The air-jet spinning machine waste yarn and impurity separation device according to claim 1, characterized in that: Both the first and second collection boxes have transparent observation windows on their side walls for real-time monitoring of the internal collection volume.

7. The air-jet spinning machine waste yarn and impurity separation device according to claim 1, characterized in that: The drilled screw is an anti-loosening combination screw, including a hexagonal bolt, a spring washer, and a nylon lock nut, to counteract the vibrations generated during the operation of the spinning machine.

8. A method for separating recycled fibers from impurities using the apparatus according to any one of claims 1 to 7, characterized in that, Includes the following steps: a. Fix the first collection box to the negative pressure port at the front of the vehicle, and fix the second collection box to the negative pressure port at the rear of the vehicle; b. During the spinning process, the waste yarn containing impurities first enters the first collection box under negative pressure. The impurities are intercepted by the wire mesh filter layer and fall into the impurity box. The filtered waste yarn is then sucked into the second collection box. c. Monitor the collection volume through the observation window. When the impurity box or the second collection box reaches the preset capacity, stop the machine and remove the impurity box and open the top plate for cleaning. d. Pack the cleaned-out impurities as waste and recycle the recycled yarn after packaging.

9. The method according to claim 8, characterized in that: In step b, by adjusting the opening of the negative pressure valve at the rear of the vehicle, the negative pressure in the second collection box is made 1 kPa–2 kPa higher than the negative pressure in the first collection box, so as to promote the rapid entry of the recycled wire into the second collection box and reduce the residence time in the first collection box.

10. The method according to claim 8 or 9, characterized in that: In step c, the cleaning cycle is set to 8 hours, and a scale line is set on the observation window. When the accumulation height reaches the scale line, an audio-visual reminder is triggered to prompt the worker to clean in time.

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