Flexible constant-tension device for tows

Abstract

The invention discloses tow flexible constant tension equipment which comprises an electric control box, a control screen, an equipment rack, an equipment base plate, an output roller assembly, a flexible swing rod assembly, a driving roller assembly, a driven roller assembly, an auxiliary carrier roller assembly and a tow blocking assembly, the equipment rack is installed on the rear portion of the electric control box, and the control screen is installed on the upper portion of the electric control box; and the equipment substrate is mounted at the upper front part of the equipment rack. The rotating speed of the rubber power roller is controlled by collecting speed information of a host and speed deviation correction of the angle of the swing rod, tows are extracted from a tow stack in advance, then the tows are output at a constant speed through the flexible constant-tension swing rod, and adhesion of the tows is solved through pre-extraction of the power roller; the problem that elastic bending tension of tows is uneven is partially solved through the flexible swing rod assembly, the suction resistance fluctuation of a produced filter rod is improved by more than 10% compared with the index of an existing filter rod, and the flexible swing rod assembly can set the force balance within + / -0.2 gram force through the first elastic assembly, the second elastic assembly and the elastic swing rod assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of constant tension output of filament bundles in the production and processing of filter rods, and more particularly to a flexible constant tension output device for filament bundles. Background Art

[0002] During the filter rod production process, constant tension control of the tow is crucial for ensuring quality. Existing tow openers have several drawbacks in practical applications (they lack constant tension control). For example, the input roller relies on its own inertia to homogenize the tow, making it difficult to ensure stable technical specifications for filter rods of varying specifications. Furthermore, the system is prone to producing fly waste and inconsistencies in the tow's material quality.

[0003] At present, the filter rod forming machine equipment has a large fluctuation in the suction resistance deviation of the filter rod due to the adhesion of the wire bundle on the wire stack and the fluctuation of the elastic bending tension of the wire bundle.

[0004] Therefore, it is necessary to propose a flexible constant tension device for tow in response to the above technical problems. Summary of the Invention

[0005] In view of the defects of the prior art, the purpose of the present invention is to provide a flexible constant tension device for a tow to solve the above problems.

[0006] A flexible constant tension device for a tow, comprising an electric control box, a control panel, an equipment frame, an equipment base plate, an output roller assembly, a flexible rocker arm assembly, an active roller assembly, a driven roller assembly, an auxiliary roller assembly and a wire stop assembly. The equipment frame is installed at the rear of the electric control box, the control panel is installed at the upper part of the electric control box, the equipment base plate is installed at the upper front part of the equipment frame, the output roller assembly, the flexible rocker arm assembly, the driven roller assembly, the active roller assembly, the wire stop assembly and the auxiliary roller assembly are installed on the equipment base plate in sequence, the auxiliary support assembly is arranged at the lower part of the driven roller assembly, and the edge positions of the active roller assembly and the output roller assembly are both provided with wire stop assemblies.

[0007] The tow passes through the active roller assembly, the driven roller assembly, the auxiliary roller assembly, the flexible rocker assembly, and the output roller assembly in sequence.

[0008] Preferably, the output roller assembly includes a first fixed rod and a first rotating roller, and the first rotating roller is sleeved outside the first fixed rod.

[0009] Preferably, the flexible rocker assembly includes a first elastic assembly, a second elastic assembly, a rocker assembly and a material holding assembly. One end of the rocker assembly is hinged to one end of the first elastic assembly and the second elastic assembly. The other ends of the first elastic assembly and the second elastic assembly are hinged to the equipment base plate. The other ends of the rocker assembly are connected to the material holding assembly. One end of the rocker assembly also has an encoder assembly.

[0010] Preferably, the active roller assembly includes a power motor, a second fixed rod and a second roller, the output end of the power motor is fixed with a first pulley, the second roller is mounted on one end of the second fixed rod, the other end of the second fixed rod is fixed with a second pulley, and the first pulley is connected to the second pulley through a toothed belt.

[0011] Preferably, the driven roller assembly includes a cylinder, a rotating shaft, a roller frame and a driven roller, one end of the cylinder is hinged to the equipment base, the other end of the cylinder is hinged to the rotating shaft, the roller frame is connected to the rotating shaft, the driven roller is installed on the roller frame, and the driven roller can be in contact and connected with the second rotating roller.

[0012] Preferably, the auxiliary roller assembly includes several auxiliary rollers, preferably three auxiliary rollers, and the auxiliary rollers include a third fixed rod and a third rotating roller, one end of the third fixed rod is fixed to the equipment base plate, and the third rotating roller is mounted on the other end of the third fixed rod.

[0013] Preferably, the wire stop assembly includes a fixing frame and two adjusting pins. The fixing frame is provided with two adjusting slots. The two adjusting pins are respectively mounted on the adjusting slots and can be slidably connected to the adjusting slots.

[0014] Preferably, a first protective cover shell is installed on the outside of the flexible rocker assembly on the device base plate, the first pulley is provided with a cover, and a second protective cover shell is installed on the rear of the device base plate.

[0015] Preferably, the electric control box, encoder assembly, power motor, and cylinder are all electrically connected to the control panel.

[0016] Compared with the existing technology, it has the following beneficial effects:

[0017] 1. The present invention collects the speed information of the main machine and uses the speed correction of the swing arm angle to control the rotation speed of the rubber power roller, extracting the tow from the wire pile in advance. The tow is then output at a uniform speed through the elastic constant tension swing arm.

[0018] 2. The equipment solves the problem of tow adhesion through pre-extraction with a powered roller, and partially solves the uneven elastic bending tension of the tow through a flexible rocker assembly. The resulting filter rod has a suction resistance fluctuation that is more than 10% higher than that of current filter rods.

[0019] 3. The flexible rocker assembly can set the force balance within ±0.2 grams through the first elastic assembly, the second elastic assembly and the elastic rocker assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figures 1 to 3 is a schematic diagram of the structure of the invention;

[0021] Figures 4 to 6 It is a structural diagram of components on the device substrate of the present invention;

[0022] Figure 7 is a structural diagram of the output roller assembly of the present invention;

[0023] Figure 8 and Figure 9 Schematic diagram of the structure of the flexible rocker assembly of the present invention;

[0024] Figure 10 This is a structural diagram of the active roller assembly of the present invention;

[0025] Figure 11 and Figure 12 It is a structural diagram of the active roller assembly and the driven roller assembly of the present invention;

[0026] Figure 13 is a schematic diagram of the auxiliary roller assembly of the present invention;

[0027] Figure 14 It is a structural diagram of the wire stop assembly of the present invention.

[0028] 10. Wire stop assembly; 101. Fixed frame; 102. Adjusting pin; 103. Adjusting slot; 111. First protective cover; 112. Cover; 113. Second protective cover. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] The terms "first" and "second" in the specification and claims of the present invention are used to distinguish different objects, rather than to describe a specific order of objects. For example, "first control instruction" and "second control instruction" are used to distinguish different control instructions, rather than to describe a specific order of control instructions.

[0031] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0032] In the description of the embodiments of the present invention, unless otherwise specified, “multiple” means two or more than two. For example, multiple processing units means two or more processing units, etc.; multiple elements means two or more elements, etc.

[0033] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0034] like Figure 1 Combined with Figures 2 to 14 As shown, a flexible constant tension device for a tow includes an electric control box 1, a control panel 2, an equipment frame 3, an equipment base plate 4, an output roller assembly 5, a flexible rocker assembly 6, an active roller assembly 7, a driven roller assembly 8, an auxiliary roller assembly 9 and a wire stop assembly 10. The equipment frame 3 is installed at the rear of the electric control box 1, the control panel 2 is installed at the upper part of the electric control box 1, and the equipment base plate 4 is installed at the upper front part of the equipment frame 3. The output roller assembly 5, the flexible rocker assembly 6, the driven roller assembly 8, the active roller assembly 7, the wire stop assembly 10 and the auxiliary roller assembly 9 are installed on the equipment base plate 4 in sequence, the auxiliary roller assembly 9 is arranged at the lower part of the driven roller assembly 8, and the edge positions of the active roller assembly 7 and the output roller assembly 5 are both provided with wire stop assemblies 10.

[0035] The tow passes through the output roller assembly 5, the flexible rocker assembly 6, the auxiliary roller assembly 9, the driven roller assembly 8 and the active roller assembly 7 in sequence.

[0036] The output roller assembly 5 includes a first fixed rod 51 and a first rotating roller 52. The first rotating roller 52 is sleeved outside the first fixed rod 51 and installed at the front end of the equipment base plate 4 for outputting the tow.

[0037] The flexible rocker assembly 6 comprises a first elastic component 61, a second elastic component 62, a rocker assembly 63, and a material container assembly 64. One end of the rocker assembly 63 is hinged to one end of each of the first and second elastic components 61, 62. The other ends of these components are hinged to the device base plate 4. The other end of the rocker assembly 63 is connected to the material container 64, and one end of the rocker assembly 63 is equipped with an encoder assembly 65. When the tow tension changes, the rocker assembly 63 swings under the influence of the tow tension and the elastic force of the elastic components. The encoder assembly 65 detects the change in position and transmits a signal to the control panel 2.

[0038] The active roller assembly 7 comprises a power motor 71, a second fixed rod 74, and a second roller 73. A first pulley 72 is fixed to the output end of the power motor 71. The second roller 73 is mounted on one end of the second fixed rod 74. A second pulley 75 is fixed to the other end of the second fixed rod 74. The first pulley 72 is connected to the second pulley 75 via a toothed belt 76. When the power motor 71 is activated, the second roller 73 rotates via the pulley and toothed belt 76, providing power for tow transport.

[0039] The driven roller assembly 8 comprises a cylinder 81, a rotating shaft 82, a roller frame 83, and a driven roller 84. One end of the cylinder 81 is hinged to the equipment base plate 4, and the other end is hinged to the rotating shaft 82. The roller frame 83 is connected to the rotating shaft 82. The driven roller 84 is mounted on the roller frame 83 and can be in contact with the second rotating roller 73. The control panel 2 controls the extension and contraction of the cylinder 81 based on the tension signal fed back by the encoder assembly 65, adjusting the pressure between the driven roller 84 and the second rotating roller 73, thereby regulating the tow tension.

[0040] The auxiliary roller assembly 9 includes several auxiliary rollers (preferably three), each of which includes a third fixed rod 91 and a third rotating roller 92. One end of the third fixed rod 91 is fixed to the equipment base plate 4, and the third rotating roller 92 is sleeved on the other end of the third fixed rod 91 and is arranged at the bottom of the driven roller assembly 8 to assist in supporting the tow.

[0041] The wire blocking assembly 10 includes a fixed frame 101 and two adjusting pins 102. The fixed frame 101 is provided with two adjusting slots 103. The adjusting pins 102 are slidably mounted on the adjusting slots 103. The wire blocking assembly 10 is mounted at the edge of the active roller assembly 7 and the output roller assembly 5 to prevent the wire bundle from deflecting.

[0042] A first protective cover 111 is installed outside the flexible rocker assembly 6; the first pulley 72 is provided with a cover 112;

[0043] A second protective cover 113 is installed at the rear of the device base plate 4 to protect various components.

[0044] The electric control box 1, encoder assembly 65, power motor 71, and cylinder 81 are all electrically connected to the control panel 2. The control panel 2 controls the various electrical components through the electric control box 1 to realize the automatic operation of the equipment.

[0045] Compared with the existing technology, it has the following beneficial effects:

[0046] 1. The present invention collects the speed information of the main machine and uses the speed correction of the swing arm angle to control the rotation speed of the rubber power roller, extracting the tow from the wire pile in advance. The tow is then output at a uniform speed through the elastic constant tension swing arm.

[0047] 2. The equipment solves the problem of tow adhesion through pre-extraction by the power roller, and partially solves the uneven elastic bending tension of the tow through the flexible rocker assembly 6. The suction resistance fluctuation of the filter rod produced in this way is improved by more than 10% compared with the current filter rod index.

[0048] 3. The flexible rocker assembly 6 can set the force balance within ±0.2 grams of force through the first elastic assembly, the second elastic assembly and the elastic rocker assembly.

[0049] Working principle:

[0050] The tow is delivered from the output roller assembly 5 and conveyed sequentially through the material container assembly 64 of the flexible rocker assembly 6, the auxiliary roller assembly 9, the driven roller assembly 8, and the active roller assembly 7. During conveyance, the flexible rocker assembly 6 swings in response to changes in tension. The encoder assembly 65 detects the signal and feeds it back to the control panel 2, which adjusts the speed of the power motor 71 and the pressure of the cylinder 81 to maintain constant tension. The wire stop assembly 10 prevents deviation, the auxiliary roller assembly 9 ensures stability, and the protective cover protects the components.

[0051] Example 1: High-rigidity tension control solution adapted to polypropylene tow

[0052] Technical parameter adjustment

[0053] Flexible rocker assembly: A first elastic component 61 (spring steel material) with a stiffness coefficient of 15 N / m and a second elastic component 62 (alloy spring) with a stiffness coefficient of 20 N / m are used. The length of the rocker assembly 63 is shortened to 200 mm to improve the response speed.

[0054] Driven roller assembly: The maximum working pressure of the cylinder 81 is set to 0.08-0.2 MPa, and the surface of the driven roller 84 is covered with an anti-slip silicone layer (thickness 6 mm) to enhance the friction with the polypropylene tow.

[0055] Control logic: The sampling frequency of the encoder component 65 is increased to 36000Hz, and the speed adjustment accuracy of the power motor 71 of the control panel 2 is refined to 0.01r / s.

[0056] Workflow

[0057] In view of the characteristics of polypropylene tow that it is highly rigid and easy to stick together, the initial speed of the power motor 71 is set to 120r / min. The second roller 73 is driven by the first pulley 72 and the toothed belt 76 to pre-extract the tow, and the extraction stability is improved by 20% compared with traditional equipment.

[0058] When the tow tension fluctuates by more than ±0.3 g-f due to changes in the winding diameter, the swing arm assembly 63 swings to trigger the encoder assembly 65, and the control panel 2 synchronously adjusts the speed of the power motor 71 (error ±0.5%) and the pressure of the cylinder 81 (error ±0.02 MPa), so that the tension quickly returns to the set value (5±0.1 g-f).

[0059] The three third rollers 92 of the auxiliary roller assembly 9 are arranged at equal heights with a spacing of 150 mm to ensure that the tow does not sag or deform during transportation.

[0060] Implementation Effect

[0061] The incidence of tow adhesion has dropped by 70%, and the fluctuation of filter rod suction resistance has been reduced from ±8% of traditional equipment to ±6.5%, meeting the stable wire supply requirements of high-speed filter rod forming machines (6,000 pieces / minute).

[0062] Example 2: Flexible Tension Compensation Solution for Acetate Tow

[0063] Technical parameter adjustment

[0064] Flexible rocker assembly: replaced with a first elastic assembly 61 (polyurethane elastomer) with a stiffness coefficient of 8 N / m and a second elastic assembly 62 (rubber spring) with a stiffness coefficient of 12 N / m. A damper (damping coefficient 5 N·s / m) is added to the rocker assembly 63 to reduce oscillation.

[0065] Driven roller assembly: The working pressure range of cylinder 81 is adjusted to 0.1-0.2 MPa, and the diameter of driven roller 84 is reduced to 50 mm to adapt to fine denier acetate fiber (1.5D).

[0066] Protection structure: an anti-static coating is added inside the first protection cover 111, and a pressure equalization hole with a diameter of 5 mm is opened in the cover 112 to prevent airflow disturbance.

[0067] Workflow

[0068] In view of the soft and stretchable characteristics of acetate fiber tow, the initial speed of the power motor 71 is set to 80 r / min, and the second roller 73 is driven by the toothed belt 76 to transport the tow at a constant linear speed of 0.8 m / s to avoid excessive stretching.

[0069] When the bundle tension changes due to changes in ambient humidity (such as RH increases from 50% to 70%, resulting in a decrease in the bundle modulus), the swing amplitude of the rocker assembly 63 is limited to ±5° through the buffering effect of the material holding assembly 64, and the encoder assembly 65 feeds back the signal to the control panel 2, and fine-tunes the pressure of the cylinder 81 in real time (adjustment step 0.01 MPa) to maintain the tension stable at 3±0.2 grams of force.

[0070] The spacing between the adjusting pins 102 of the wire stop assembly 10 is adjusted to 8 mm, and the level gauge on the equipment base plate 4 is calibrated to ensure that the fine denier wire bundle has no edge deviation.

[0071] Implementation Effect

[0072] The tow tensile breakage rate dropped by 60%, and the filter rod suction resistance fluctuation was controlled within ±5%, meeting the production requirements of high-precision filter rods (diameter below 5mm), and the equipment operating noise was reduced from 75dB to 68dB.

[0073] Common technical features of the embodiments

[0074] Tension closed-loop control: The position signal of the rocker assembly 63 is collected in real time through the encoder assembly 65. After processing by the control panel 2, the speed of the power motor 71 and the pressure of the cylinder 81 are synchronously adjusted to form a closed-loop system of "detection-feedback-regulation".

[0075] Modular design: Key components such as the output roller assembly 5 and the active roller assembly 7 adopt a quick-release structure. By replacing the second roller 73 (with different diameters / surface treatments) and the elastic component (with different stiffness coefficients), production switching of different tow specifications can be completed within 30 minutes.

[0076] Safety protection: The first protective cover shell 111 and the second protective cover shell 113 are both made of transparent PC material (thickness 5mm), taking into account both observation convenience and mechanical protection. The cover 112 has a built-in micro switch, and opening the cover will trigger the equipment shutdown protection.

[0077] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flexible constant tension device for tow, characterized by: The invention comprises an electric control box (1), a control panel (2), an equipment frame (3), an equipment base plate (4), an output roller assembly (5), a flexible rocker arm assembly (6), an active roller assembly (7), a driven roller assembly (8), an auxiliary roller assembly (9) and a wire stop assembly (10), wherein the equipment frame (3) is mounted at the rear of the electric control box (1), the control panel (2) is mounted at the upper part of the electric control box (1), the equipment base plate (4) is mounted at the upper front part of the equipment frame (3), the output roller assembly (5), the flexible rocker arm assembly (6), the driven roller assembly (8), the active roller assembly (7), the wire stop assembly (10) and the auxiliary roller assembly (9) are mounted on the equipment base plate (4) in sequence, the auxiliary roller assembly (9) is arranged at the lower part of the driven roller assembly (8), and the edge positions of the active roller assembly (7) and the output roller assembly (5) are both provided with wire stop assemblies (10).

2. A flexible constant tension device for tow according to claim 1, characterized in that: The filament bundle passes through the output roller assembly (5), the flexible rocker assembly (6), the auxiliary roller assembly (9), the driven roller assembly (8) and the active roller assembly (7) in sequence.

3. The flexible constant tension device for tow according to claim 1, characterized in that: The output roller assembly (5) comprises a first fixed rod (51) and a first rotating roller (52), wherein the first rotating roller (52) is sleeved outside the first fixed rod (51).

4. The flexible constant tension device for tow according to claim 1, characterized in that: The flexible rocker assembly (6) comprises a first elastic assembly (61), a second elastic assembly (62), a rocker assembly (63) and a material holding assembly (64); one end of the rocker assembly (63) is hinged to one end of the first elastic assembly (61) and the second elastic assembly (62); the other ends of the first elastic assembly (61) and the second elastic assembly (62) are hinged to the device base plate (4); the other end of the rocker assembly (63) is connected to the material holding assembly (64), and one end of the rocker assembly (63) is provided with an encoder assembly (65).

5. A flexible constant tension device for tow according to claim 4, characterized in that: The active roller assembly (7) comprises a power motor (71), a second fixed rod (74) and a second rotating roller (73); a first pulley (72) is fixed to the output end of the power motor (71); the second rotating roller (73) is sleeved on one end of the second fixed rod (74); a second pulley (75) is fixed to the other end of the second fixed rod (74); the first pulley (72) is connected to the second pulley (75) by a toothed belt (76).

6. A flexible constant tension device for tow according to claim 5, characterized in that: The driven roller assembly (8) includes a cylinder (81), a rotating shaft (82), a roller frame (83) and a driven roller (84). One end of the cylinder (81) is hinged to the equipment base plate (4), and the other end is hinged to the rotating shaft (82). The roller frame (83) is connected to the rotating shaft (82). The driven roller (84) is installed on the roller frame (83) and can be in contact with the second rotating roller (73).

7. The flexible constant tension device for tow according to claim 1, characterized in that: The auxiliary roller assembly (9) includes a plurality of auxiliary rollers, preferably three, each of which includes a third fixed rod (91) and a third rotating roller (92), one end of the third fixed rod (91) is fixed to the equipment base plate (4), and the third rotating roller (92) is sleeved on the other end of the third fixed rod (91).

8. The flexible constant tension device for tow according to claim 1, characterized in that: The wire blocking assembly (10) comprises a fixing frame (101) and two adjusting pins (102); the fixing frame (101) is provided with two adjusting slots (103); and the adjusting pins (102) are mounted on the adjusting slots (103) and are slidable.

9. The flexible constant tension device for tow according to claim 5, characterized in that: The flexible rocker assembly (6) is externally mounted with a first protective cover (111), the first pulley (72) is provided with a cover (112), and the rear portion of the equipment base plate (4) is mounted with a second protective cover (113).

10. The flexible constant tension device for tow according to claim 6, characterized in that: The electric control box (1), encoder assembly (65), power motor (71), and cylinder (81) are all electrically connected to the control panel (2).

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