Control system suitable for composite spunlace non-woven fabric production process

Abstract

The utility model provides a control system suitable for a composite spunlace non-woven fabric production process, which aims at solving the problems in the prior art that the quality is unstable, the quality does not meet the requirement, the automatic control almost treats the blank state and the like in the composite spunlace non-woven fabric preparation process, and belongs to the technical field of non-woven fabrics. According to the preparation system for the composite spunlace non-woven fabric, on the basis of the specific arrangement of all the components in the preparation system for the composite spunlace non-woven fabric, the lapping speed, the running speed and the like of the corresponding components (especially the running speed of a flattening roller, the unwinding speed and the running speed of a spunlace machine drum) are controlled through the logic relation of the human-computer interface, the PLC, the data acquisition unit, the execution unit and the like; therefore, the stability, orderliness and controllability of the production process of the composite spunlace non-woven fabric are guaranteed, the wrinkling rate is reduced, the quality of the composite spunlace non-woven fabric is improved, and meanwhile effective premise and guarantee are provided for production of the functional composite spunlace non-woven fabric.

Description

Technical Field

[0001] The utility model specifically relates to a control system suitable for a production process of composite spunlace non-woven fabrics, and belongs to the technical field of non-woven fabrics. Background Art

[0002] Spunlace nonwoven fabric, also known as "spunlace nonwoven fabric", uses long fibers as raw materials. After opening, carding, laying, spunlace, and drying, it forms a nonwoven fabric, and then is curled into shape by a winding machine. At present, the mainstream spunlace nonwoven fabric processing process is as follows: 1. Fiber opening: The fiber raw materials are quantitatively opened and mixed; 2. Fiber web forming: carding, air-laid, and wet-laid; 3. Fiber web laying: cross-laid or parallel-laid (two combs and one lay semi-cross-laid, two combs and two lays fully cross-laid, two combs and parallel-laid); 4. Fiber web consolidation: The fiber web is entangled by high-pressure water needle penetration from top to bottom; 5. Fiber cloth dehydration: Vacuum suction to dehydrate the cloth surface; 6. Fiber cloth drying: hot air penetration or drying with a dryer. The above is the production process of conventional spunlace nonwoven fabrics. In order to improve product performance, some manufacturers have modified this process to produce composite nonwoven fabric products. There are mainly the following methods:

[0003] 1. The upper carded fiber web layer A and the middle wood pulp fiber web layer are composited through a wet spunlace process. This involves the short fibers formed through the carding process and the wood pulp fiber layer formed through the pulp distributor being entangled and connected with each other under the action of high-pressure water jets. This is then composited through a single spunlace process and then composited with the lower carded fiber web layer B through a secondary dry spunlace process. The middle wood pulp fiber web layer involved in this process is wet-formed and composited through two spunlace processes.

[0004] 2. After the fibers are opened, carded, laid and stretched, a lower fiber web layer is formed. The middle layer is a wet-made wood pulp paper which is superimposed on the upper surface of the lower fiber web layer through an unwinding device. The opened and carded fiber web layer is then superimposed on the upper surface of the middle layer to form a three-layer spunlace composite nonwoven fabric.

[0005] 3. Prepare the CSC three-layer composite spunlace nonwoven fabric as described above, with both the upper and lower layers being carded 100% polyester, and the middle layer being a PP spunbond nonwoven. This process includes: cleaning the polyester fibers, carding the web, hydroentangling the upper, middle, and lower layers, and drying. The composite nonwoven fabric is formed by hydroentangling the three layers of carded polyester fibers and PP spunbond nonwoven, either online or offline, through unwinding. The resulting jacquard pattern creates a three-dimensional spunlace nonwoven fabric.

[0006] 4. When the middle fiber layer is wood pulp or cotton pulp, before the lower fiber web overlaps with the upper fiber web, an air-laid machine is installed in front of the lower carding machine. The required wood pulp or cotton pulp passes through the middle opener and air-laid machine and is evenly laid on the lower fiber web. When the middle fiber layer is household paper, before the lower fiber web overlaps with the upper fiber web, an unwinding device is installed in front of the lower carding machine. The required household paper is unwound at a constant speed and overlapped with the lower fiber web. The unwinding device uses active unwinding, with the unwinding speed consistent with the lower fiber web conveyor curtain, and uses a single roller surface unwinding with a rubber surface.

[0007] The above-mentioned composite methods have high requirements for equipment. During the production process, it was found that the product quality was extremely unstable, and some of the prepared products could not meet the quality requirements, such as wrinkling easily. In addition, the automated control of the composite spunlace non-woven fabric preparation process was almost blank, especially the screen speed and operation speed of each equipment.

[0008] Although the prior art CN117270433A discloses "a fully automatic digital electrical control system for a spunlace non-woven fabric production line", it mainly involves electrical control and is not applicable to a composite spunlace non-woven fabric production line; and the prior art CN117873001A discloses "an intelligent control system for a spunbond non-woven fabric production line", which mainly controls the temperature of the spunbond non-woven fabric during the heat treatment and curing process. Similarly, it is not applicable to a composite spunlace non-woven fabric production line, and so on. Summary of the Invention

[0009] To overcome the shortcomings of existing technologies, a control system suitable for the production of composite spunlace nonwoven fabrics has been proposed. Based on the specific arrangement of components in the composite spunlace nonwoven fabric production system, this technical solution controls the web laying and operating speeds of corresponding components (particularly the flattening roller speed, unwinding speed, and spunlace drum speed). This ensures the stability, orderliness, and controllability of the composite spunlace nonwoven fabric production process, reduces wrinkling, and improves the quality of the composite spunlace nonwoven fabric.

[0010] In order to achieve the above technical objectives, the following technical solutions are proposed:

[0011] A control system suitable for the production process of composite spunlace non-woven fabrics is provided in a composite spunlace non-woven fabric preparation system, wherein the composite spunlace non-woven fabric preparation system includes an opener, a carding machine I, a carding machine II, a web laying machine, a drafting machine, an unwinding machine, a web closing roller, a spunlace machine and a drying machine, wherein the carding machine I is provided at the rear side of the workstation of the opener, and the web laying machine is provided at the rear side of the workstation of the carding machine I. The drafting machine is located behind the web laying machine. A flat curtain is installed behind the drafting machine. A slanted curtain is installed behind the flat curtain. A flattening roller is installed next to the slanted curtain. A closing curtain is installed behind the slanted curtain. A closing roller is installed between the closing curtain and the slanted curtain. The hydroentanglement machine is located behind the closing curtain. A hydroentanglement pre-wetting curtain and a rotary drum are installed inside the hydroentanglement machine. The dryer is located behind the hydroentanglement machine. A continuous passage for forming and conveying the lower fiber web is formed between the opener, carding machine I, web laying machine, drafting machine, flat curtain, slanted curtain and closing roller.

[0012] The unwinder is located in front of the flattening roller. The area between the unwinder, flattening roller and closing roller is a continuous path for conveying the middle layer unwinding product (such as bamboo fiber paper).

[0013] The carding machine II is located at the rear side of the opening machine station, and the carding machine II is located in front of the closing roller station. The opening machine, carding machine II and closing roller form a continuous passage for the formation and transportation of the upper fiber web.

[0014] The continuous passage between the closing roller, closing curtain, spunlacing machine and dryer is used for closing the web, spunlacing and drying the composite spunlaced nonwoven fabric.

[0015] The control system includes a PLC controller, the PLC controller is connected to a human-machine interface via a data input interface, the PLC controller is connected to a data acquisition unit via a data feedback interface, and the PLC controller is connected to an execution unit via a data output interface;

[0016] The PLC controller includes a carding machine I web speed control unit, a web laying machine web speed control unit, a drafting machine web speed control unit, a flat curtain conveying speed control unit, a slanted curtain conveying speed control unit, a closing curtain conveying speed control unit, a spunlace pre-wet curtain conveying speed control unit, a spunlace machine drum running speed control unit, a flattening roller running speed control unit, a carding machine II web speed control unit and an unwinding machine unwinding speed control unit;

[0017] Carding machine I web output speed control unit: includes a carding machine I carding speed receiving module and a carding machine I web output speed communication module, and the carding machine I carding speed receiving module is connected to the human-machine interface;

[0018] The web laying machine web speed control unit includes a web laying layer number receiving module, a web laying width receiving module, a web laying machine draft ratio receiving module, a carding machine I web laying speed receiving module, a web laying machine web laying speed calculation module, and a web laying machine web laying speed communication module. The web laying layer number receiving module, the web laying width receiving module, and the web laying machine draft ratio receiving module are all connected to the human-machine interface, and the carding machine I web laying speed receiving module is connected to the carding machine I web laying speed communication module.

[0019] The drafting machine web speed control unit includes a drafting machine draft ratio receiving module, a web laying machine web speed receiving module, a drafting machine web speed calculation module, and a drafting machine web speed communication module. The web laying machine web speed receiving module is connected to the web laying machine web speed communication module, and the drafting machine draft ratio receiving module is connected to the human-machine interface.

[0020] Flat curtain conveying speed control unit: includes flat curtain draft ratio receiving module, drafting machine web speed receiving module, flat curtain conveying speed calculation module and flat curtain conveying speed communication module; the drafting machine web speed receiving module is connected to the drafting machine web speed communication module, and the flat curtain draft ratio receiving module is connected to the human-machine interface;

[0021] Slant curtain conveying speed control unit: includes a slant curtain draft ratio receiving module, a flat curtain conveying speed receiving module, a slant curtain conveying speed calculation module and a slant curtain conveying speed communication module; the flat curtain conveying speed receiving module is connected to the flat curtain conveying speed communication module, and the slant curtain draft ratio receiving module is connected to the human-machine interface;

[0022] The net curtain conveying speed control unit includes a net curtain draft ratio receiving module, a slant curtain conveying speed receiving module I, a net curtain conveying speed calculation module, and a net curtain conveying speed communication module. The slant curtain conveying speed receiving module I is connected to the slant curtain conveying speed communication module, and the net curtain draft ratio receiving module is connected to the human-machine interface.

[0023] Spunlace pre-wet curtain conveying speed control unit: includes spunlace pre-wet curtain draft ratio receiving module, net curtain conveying speed receiving module I, spunlace pre-wet curtain conveying speed calculation module and spunlace pre-wet curtain conveying speed communication module; net curtain conveying speed receiving module I is connected to the net curtain conveying speed communication module, and the spunlace pre-wet curtain draft ratio receiving module is connected to the human-machine interface;

[0024] The hydroentanglement machine drum speed control unit includes a hydroentanglement machine drum draft ratio receiving module, a hydroentanglement pre-wet pad conveying speed receiving module, a hydroentanglement machine drum speed calculation module, and a hydroentanglement machine drum speed communication module. The hydroentanglement pre-wet pad conveying speed receiving module is connected to the hydroentanglement pre-wet pad conveying speed communication module, and the hydroentanglement machine drum draft ratio receiving module is connected to the human-machine interface.

[0025] Flattening roller running speed control unit: includes flattening roller draft ratio receiving module, oblique curtain conveying speed receiving module II, flattening roller running speed calculation module and flattening roller running speed communication module; oblique curtain conveying speed receiving module II is connected to the oblique curtain conveying speed communication module, and flattening roller draft ratio receiving module is connected to the human-machine interface;

[0026] Carding machine II web output speed control unit: includes a carding machine II draft ratio receiving module, a closing curtain conveying speed receiving module II, and a carding machine II web output speed calculation module; the closing curtain conveying speed receiving module II is connected to the closing curtain conveying speed communication module, and the carding machine II draft ratio receiving module is connected to the human-machine interface;

[0027] Unwinder unwinding speed control unit: includes an unwinder draft ratio receiving module, a hydroentanglement machine drum operating speed receiving module, an unwinder unwinding speed calculation module, and an unwinder unwinding speed communication module; the hydroentanglement machine drum operating speed receiving module is connected to the hydroentanglement machine drum operating speed communication module, and the unwinder draft ratio receiving module is connected to the human-machine interface;

[0028] The data acquisition unit is provided in the composite spunlace nonwoven fabric preparation system, and the data acquisition unit includes a sensor group for collecting and transmitting data in the composite spunlace nonwoven fabric production process of the unwinding product;

[0029] The execution unit is provided in a system for preparing the composite spunlace nonwoven fabric, and the execution unit includes a group of equipment for preparing the composite spunlace nonwoven fabric by unwinding the product.

[0030] Furthermore, the PLC controller also includes an alarm unit.

[0031] Furthermore, the sensor group includes a tachometer I connected to the flattening roller, a tachometer II connected to the unwinding machine, and a tachometer III connected to the hydroentanglement machine drum. Tachometer I is connected to the flattening roller running speed control unit, tachometer II is connected to the unwinding machine unwinding speed control unit, and tachometer III is connected to the hydroentanglement machine drum running speed control unit.

[0032] Furthermore, the equipment group includes a spreading motor for driving the flattening roller, an unwinding motor for driving the unwinding machine, and a drum motor for driving the hydroentanglement machine drum;

[0033] The spreading motor is connected to the flattening roller running speed communication module through the frequency converter I, the unwinding motor is connected to the unwinding speed communication module through the frequency converter II, and the drum motor is connected to the hydroentanglement machine drum running speed communication module through the frequency converter III.

[0034] Furthermore, in the preparation system of the composite spunlace non-woven fabric, a screen curtain for conveying the lower fiber web is provided at the discharge port of the drafting machine, and the screen curtain is provided in front of the station of the flat curtain; the screen curtain on the unwinding machine extends toward the feed port of the flat curtain; the upper fiber web at the discharge port of the carding machine II extends toward the discharge port of the oblique curtain;

[0035] In the conveying direction, guide roller I, guide roller II, guide roller III, guide roller IV and a flattening roller group for compounding the lower fiber web with the unwound product are arranged in sequence. Guide roller I is arranged near the discharge port of the unwinder, guide roller II is arranged above the discharge port of the web curtain, guide roller III is arranged above the feed port of the flat curtain, guide roller IV is arranged above the discharge port of the flat curtain, and guide roller III and guide roller IV are arranged parallel in the horizontal direction, and the horizontal plane where guide roller III and guide roller IV are located is parallel to the horizontal plane where the flat curtain is located, that is, in the flat curtain section, the unwound product is located above the lower fiber web, and the two are arranged in parallel, which is convenient for subsequent compounding in the inclined curtain section and reduces the wrinkling rate; the inclined curtain is arranged inclined upward, and the flattening roller group is arranged directly above the surface where the inclined curtain is located;

[0036] In the conveying direction of the upper fiber web, a guide roller V and a closing roller for combining the upper fiber web with the unwinding product are arranged in sequence. The guide roller V is located near the discharge port of the carding machine, and the closing roller is located above the discharge port of the inclined curtain. The closing roller is also located at the rear side of the flattening roller group.

[0037] A continuous passage for conveying the lower fiber web is formed between the drafting machine, the web curtain, the flat curtain and the flattening roller group;

[0038] A continuous passage for conveying the unwinding product in the middle layer is formed between the unwinding machine, guide roller I, guide roller II, guide roller III, guide roller IV and the flattening roller group;

[0039] A continuous passage for conveying the upper fiber web is formed between the carding machine II, the cloth guide roller V and the web closing roller;

[0040] The flattening roller group includes a guide roller VII for pulling the unrolled product, a flattening roller for flattening the middle layer unrolled product, and a guide roller VIII for compounding the lower layer fiber web and the middle layer unrolled product. A continuous passage for conveying the unrolled product is formed between the lower side of the guide roller VII, the upper side of the flattening roller, and the lower side of the guide roller VIII.

[0041] Furthermore, the unwinding machine is arranged on the unwinding platform, and the unwinding platform is arranged above the drawing machine. On the one hand, it ensures that the unwinding machine is arranged at a high position, so that the unwinding machine has a certain horizontal height, which is convenient for stacking the middle layer unwinding product on the upper surface of the lower layer - fiber web I, to achieve effective compounding and transmission between the middle layer and the lower layer, and prevent wrinkles from occurring between the two, which indirectly ensures the stability and sustainability of the compounding process; on the other hand, this arrangement effectively saves production space and improves the efficient utilization of limited space.

[0042] Furthermore, the mesh curtain is arranged to be tilted downward, so as to facilitate the stacking and compounding of the lower layer fiber web and the middle layer unrolled product in the upper feeding section of the flat curtain.

[0043] Furthermore, the carding machine II is arranged on the carding platform, and the flat curtain is arranged below the carding platform. On the one hand, it ensures that the carding machine II is arranged at a high position, so that the discharge port of the carding machine II has a certain horizontal height, which is convenient for stacking the upper fiber web on the upper surface of the middle layer unwinding product, realizing effective compounding and transmission between the upper layer and the middle layer, and preventing wrinkles from occurring between the two, which indirectly ensures the stability and sustainability of the compounding process; on the other hand, this arrangement effectively saves production space and improves the efficient utilization of limited space.

[0044] Furthermore, the combing platform is arranged on a supporting column, which ensures that the combing platform is arranged at a high position and facilitates the arrangement of the flat curtain.

[0045] Furthermore, a conveying net curtain is provided at the discharge port of the carding machine, the conveying net curtain is arranged to be inclined downward, the conveying net curtain extends to the discharge port of the inclined curtain, and the conveying net curtain is arranged in front of the station of the inclined curtain.

[0046] Furthermore, the distance between the cloth guide roller VII and the oblique curtain is greater than the distance between the cloth guide roller VIII and the oblique curtain.

[0047] Furthermore, the outer diameter of the cloth guide roller VII is smaller than that of the flattening roller, and the outer diameter of the cloth guide roller VIII is smaller than that of the flattening roller.

[0048] In this technical solution, a winder is provided at the rear side of the dryer station for receiving and unwinding the composite spunlace non-woven fabric, which is convenient for subsequent processing or transportation.

[0049] The positional relationships involved in this technical solution, such as "back of the workstation", "between", "front of the workstation", "above", "below", "inclined upward", "inclined downward", and "directly above", are defined according to the actual usage conditions. They are conventional terms in this technical field and are also conventional terms used by technical personnel in this field in actual use.

[0050] In the description of this technical solution, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0051] The beneficial technical effects brought about by adopting this technical solution are:

[0052] 1. In this utility model, based on the composite spunlace nonwoven fabric production system (specific arrangement of various components), a corresponding control system is proposed. Through the logical relationship between the human-machine interface, PLC controller, data acquisition unit, and execution unit, it can better cooperate with the composite spunlace nonwoven fabric production system and production process, and ensure the stability, orderliness, and controllability of the unwinding composite spunlace nonwoven fabric production process, thereby meeting the needs of industrialized, automated, and economical large-scale production, and providing an effective prerequisite for the production of functional composite spunlace nonwoven fabrics.

[0053] 2. When preparing composite spunlace non-woven fabrics, the utility model only needs to add a reel and a guide roller to the ordinary spunlace production line, without adding other equipment. The three layers of materials after the web are directly composited through one spunlace. The process is short and efficient, and can realize the composite of different rolls and fiber webs, and thus can be better coordinated with the composite spunlace non-woven fabric production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a schematic diagram of the equipment layout of the composite spunlace nonwoven fabric preparation system involved in the present utility model;

[0055] Figure 2 This is a flow chart of the process for preparing the composite spunlace nonwoven fabric involved in the present utility model;

[0056] Figure 3 This is a logic connection block diagram of the control system in the utility model;

[0057] Figure 4 This is the structural block diagram of the PLC controller in this utility model;

[0058] Figure 5 This is a schematic diagram of the working principle of the control system in this utility model;

[0059] Figure 6 It is the logic control diagram of the control method in this utility model;

[0060] In the figure, 1, opener, 2, carding machine I, 3, carding machine II, 4, web laying machine, 5, drafting machine, 6, unwinding machine, 7, web closing roller, 8, spunlace machine, 9, drying machine, 10, flat curtain, 11, oblique curtain, 12, flattening roller, 13, web closing curtain, 14, web output curtain, 15, guide roller I, 16, guide roller II, 17, guide roller III, 18, guide roller IV, 19, flattening roller group, 191, guide roller VII, 192, guide roller VIII, 20, guide roller V, 22, unwinding platform, 23, carding platform, 24, support column, 25, conveying curtain;

[0061] 26. PLC controller, 260. Carding machine I web output speed control unit, 261. Lapping machine web output speed control unit, 262. Drafting machine web output speed control unit, 263. Flat curtain conveying speed control unit, 264. Slanted curtain conveying speed control unit, 265. Closing curtain conveying speed control unit, 266. Spunlace pre-wet curtain conveying speed control unit, 267. Spunlace machine drum operating speed control unit, 268. Flattening roller operating speed control unit, 269. Carding machine II web output speed control unit, 270. Unwinder unwinding speed control unit, 271. Alarm unit;

[0062] 27. Human-machine interface;

[0063] 28. Data acquisition unit, 280. Sensor group, 2800. Tachometer I, 2801. Tachometer II, 2803. Tachometer III;

[0064] 29. Execution unit, 290. Equipment group, 2900. Spreading motor, 2901. Unwinding motor, 2902. Drum motor. DETAILED DESCRIPTION

[0065] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. It is obvious that the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0066] Example 1

[0067] This embodiment provides: a control system suitable for a composite spunlace nonwoven fabric production process, which is provided in a composite spunlace nonwoven fabric preparation system, wherein the composite spunlace nonwoven fabric preparation system includes an opener 1, a carding machine I2, a carding machine II3, a web laying machine 4, a drafting machine 5, an unwinding machine 6, a web closing roller 7, a spunlace machine 8, and a drying machine 9, wherein the carding machine I2 is provided at the rear side of the workstation of the opener 1, and the web laying machine 4 is provided at the rear side of the workstation of the carding machine I2. The drafting machine 5 is arranged at the rear side of the working station of the web laying machine 4. The working station of the drafting machine 5 is provided with a flat curtain 10. The working station of the flat curtain 10 is provided with a slanted curtain 11. The side of the slanted curtain 11 is provided with a flattening roller 12. The working station of the slanted curtain 11 is provided with a closing curtain 13. A closing roller 7 is provided between the closing curtain 13 and the slanted curtain 11. The spunlace machine 8 is arranged at the rear side of the working station of the closing curtain 13. The spunlace machine 8 is provided with a spunlace pre-wet curtain and a rotary drum. The dryer 9 is arranged at the rear side of the working station of the spunlace machine 8. The opening machine 1, the carding machine Ⅰ2, the web laying machine 4, the drafting machine 5, the flat curtain 10, the slanted curtain 11 and the closing roller 7 The continuous passage for forming and conveying the lower layer fiber web is formed between the unwinder 6 and the flattening roller 12; the continuous passage for conveying the middle layer unwound product is formed between the unwinder 6, the flattening roller 12 and the closing roller 7; the carding machine II 3 is located at the rear side of the opener 1, and the carding machine II 3 is located in front of the closing roller 7; the continuous passage for forming and conveying the upper layer fiber web is formed between the opener 1, the carding machine II 3 and the closing roller 7; the continuous passage for closing roller 7, the closing curtain 13, the spunlacing machine 8 and the drying machine 9 is for closing, spunlacing and drying the composite spunlaced nonwoven fabric;

[0068] The control system includes a PLC controller 26, the PLC controller 26 is connected to a human-machine interface 27 via a data input interface, the PLC controller 26 is connected to a data acquisition unit 28 via a data feedback interface, and the PLC controller 26 is connected to an execution unit 29 via a data output interface;

[0069] The PLC controller 26 includes a carding machine I web output speed control unit 260, a web laying machine web output speed control unit 261, a drawing machine web output speed control unit 262, a flat curtain conveying speed control unit 263, a slanted curtain conveying speed control unit 264, a closing curtain conveying speed control unit 265, a spunlace pre-wet curtain conveying speed control unit 266, a spunlace machine drum operation speed control unit 267, a flattening roller operation speed control unit 268, a carding machine II web output speed control unit 269 and an unwinding machine unwinding speed control unit 270.

[0070] Among them, through the logical relationship between the human-machine interface 27, the PLC controller 26, the data acquisition unit 28 and the execution unit 29, it can better cooperate with the preparation system and preparation process of the composite spunlace non-woven fabric, and ensure the stability, orderliness and controllability of the composite spunlace non-woven fabric production process to meet the large-scale production needs of industrialization, automation and economy, and provide an effective prerequisite guarantee for the production of functional composite spunlace non-woven fabrics.

[0071] Example 2

[0072] On the basis of Example 1, this example further defines the PLC controller 26 to further illustrate this technical solution.

[0073] Among them, the carding machine I web output speed control unit 260: includes a carding machine I 2 carding speed receiving module and a carding machine I 2 web output speed communication module, and the carding machine I 2 carding speed receiving module is connected to the human-machine interface 27;

[0074] The web laying machine web speed control unit 261 includes a web laying layer number receiving module, a web laying width receiving module, a web laying machine 4 draft ratio receiving module, a carding machine I 2 web speed receiving module, a web laying machine 4 web speed calculation module, and a web laying machine 4 web speed communication module. The web laying layer number receiving module, the web laying width receiving module, and the web laying machine 4 draft ratio receiving module are all connected to the human-machine interface 27, and the carding machine I 2 web speed receiving module is connected to the carding machine I 2 web speed communication module.

[0075] The drafting machine web speed control unit 262 includes a drafting machine 5 draft ratio receiving module, a web laying machine 4 web speed receiving module, a drafting machine 5 web speed calculation module, and a drafting machine 5 web speed communication module. The web laying machine 4 web speed receiving module is connected to the web laying machine 4 web speed communication module, and the drafting machine 5 draft ratio receiving module is connected to the human-machine interface 27.

[0076] The flat curtain conveying speed control unit 263 includes a flat curtain 10 draft ratio receiving module, a drafting machine 5 web speed receiving module, a flat curtain 10 conveying speed calculation module, and a flat curtain 10 conveying speed communication module; the drafting machine 5 web speed receiving module is connected to the drafting machine 5 web speed communication module, and the flat curtain 10 draft ratio receiving module is connected to the human-machine interface 27;

[0077] The diagonal curtain conveying speed control unit 264 includes a diagonal curtain 11 draft ratio receiving module, a flat curtain 10 conveying speed receiving module, a diagonal curtain 11 conveying speed calculation module, and a diagonal curtain 11 conveying speed communication module. The flat curtain 10 conveying speed receiving module is connected to the flat curtain 10 conveying speed communication module, and the diagonal curtain 11 draft ratio receiving module is connected to the human-machine interface 27.

[0078] The net curtain conveying speed control unit 265 includes a net curtain 13 draft ratio receiving module, a slant curtain 11 conveying speed receiving module I, a net curtain 13 conveying speed calculation module, and a net curtain 13 conveying speed communication module. The slant curtain 11 conveying speed receiving module I is connected to the slant curtain 11 conveying speed communication module, and the net curtain 13 draft ratio receiving module is connected to the human-machine interface 27.

[0079] The spunlace pre-wet curtain conveying speed control unit 266 includes a spunlace pre-wet curtain draft ratio receiving module, a combined curtain 13 conveying speed receiving module I, a spunlace pre-wet curtain conveying speed calculation module, and a spunlace pre-wet curtain conveying speed communication module. The combined curtain 13 conveying speed receiving module I is connected to the combined curtain 13 conveying speed communication module, and the spunlace pre-wet curtain draft ratio receiving module is connected to the human-machine interface 27.

[0080] The hydroentanglement machine drum speed control unit 267 includes a hydroentanglement machine 8 drum draft ratio receiving module, a hydroentanglement pre-wet pad delivery speed receiving module, a hydroentanglement machine 8 drum speed calculation module, and a hydroentanglement machine 8 drum speed communication module. The hydroentanglement pre-wet pad delivery speed receiving module is connected to the hydroentanglement pre-wet pad delivery speed communication module, and the hydroentanglement machine 8 drum draft ratio receiving module is connected to the human-machine interface 27.

[0081] The flattening roller operating speed control unit 268 includes a flattening roller 12 draft ratio receiving module, a diagonal curtain 11 conveying speed receiving module II, a flattening roller 12 operating speed calculation module, and a flattening roller 12 operating speed communication module. The diagonal curtain 11 conveying speed receiving module II is connected to the diagonal curtain 11 conveying speed communication module, and the flattening roller 12 draft ratio receiving module is connected to the human-machine interface 27.

[0082] Carding machine II web delivery speed control unit 269: includes a carding machine II 3 draft ratio receiving module, a closing curtain 13 conveying speed receiving module II, and a carding machine II 3 web delivery speed calculation module; the closing curtain 13 conveying speed receiving module II is connected to the closing curtain 13 conveying speed communication module, and the carding machine II 3 draft ratio receiving module is connected to the human-machine interface 27;

[0083] Unwinder unwinding speed control unit 270: includes an unwinder 6 draft ratio receiving module, a hydroentanglement machine 8 drum operating speed receiving module, an unwinder 6 unwinding speed calculation module, and an unwinder 6 unwinding speed communication module; the hydroentanglement machine 8 drum operating speed receiving module is connected to the hydroentanglement machine 8 drum operating speed communication module, and the unwinder 6 draft ratio receiving module is connected to the human-machine interface 27;

[0084] In addition, the PLC controller 26 further includes an alarm unit 271 .

[0085] Example 3

[0086] On the basis of Examples 1-2, this example further defines the data acquisition unit 28 and the execution unit 29 to further illustrate this technical solution.

[0087] The data acquisition unit 28 is provided in the composite spunlace nonwoven fabric production system. The data acquisition unit 28 includes a sensor group 280 for data collection and transmission in the composite spunlace nonwoven fabric production process. The sensor group 280 includes a tachometer I 2800 connected to the flattening roller 12, a tachometer II 2801 connected to the unwinder 6, and a tachometer III 2803 connected to the spunlace machine 8 drum. The tachometer I 2800 is connected to the flattening roller operating speed control unit 268, the tachometer II 2801 is connected to the unwinder unwinding speed control unit 270, and the tachometer III 2803 is connected to the spunlace machine drum operating speed control unit 267.

[0088] The execution unit 29 is provided in the composite spunlace nonwoven fabric preparation system, and includes a device group 290 for preparing the composite spunlace nonwoven fabric, wherein the device group 290 includes a spreading motor 2900 for driving the flattening roller 12, an unwinding motor 2901 for driving the unwinding machine 6, and a drum motor 2902 for driving the drum of the spunlace machine 8.

[0089] The spreading motor 2900 is connected to the running speed communication module of the flattening roller 12 through the frequency converter I, the unwinding motor 2901 is connected to the unwinding speed communication module through the frequency converter II, and the drum motor 2902 is connected to the running speed communication module of the water spunlace machine 8 through the frequency converter III.

[0090] Among them, the PLC controller 26 calculates the frequency of the corresponding inverter of each component based on the main line speed and the speed ratio of each component, and transmits the frequency signal to the inverter of each motor through the communication module. The inverter directly controls the motor of each component by outputting the frequency to achieve speed control.

[0091] Example 4

[0092] On the basis of Examples 1-3, this example further defines the preparation system of the composite spunlace non-woven fabric to further illustrate the technical solution.

[0093] In the preparation system of the composite spunlace nonwoven fabric, a net curtain 14 for conveying the lower fiber web is provided at the discharge port of the drafting machine 5, and the net curtain 14 is provided in front of the station of the flat curtain 10; the unwinding product on the unwinding machine 6 extends toward the feed port of the flat curtain 10; the upper fiber web at the discharge port of the carding machine II 3 extends toward the discharge port of the oblique curtain 11;

[0094] In the conveying direction of the unwinding product, there are arranged in sequence a guide roller I 15, a guide roller II 16, a guide roller III 17, a guide roller IV 18 and a flattening roller group 19 for compounding the lower fiber web with the unwinding product. The guide roller I 15 is arranged near the discharge port of the unwinding machine 6, the guide roller II 16 is arranged above the discharge port of the mesh curtain 14, the guide roller III 17 is arranged above the feed port of the flat curtain 10, and the guide roller IV 18 is arranged above the discharge port of the flat curtain 10, and the guide roller III 17 and the guide roller IV 18 are arranged parallel in the horizontal direction, and the horizontal plane where the guide roller III 17 and the guide roller IV 18 are located is parallel to the horizontal plane where the flat curtain 10 is located; the inclined curtain 11 is arranged inclined upward, and the flattening roller group 19 is arranged directly above the surface where the inclined curtain 11 is located;

[0095] In the conveying direction of the upper fiber web, a guide roller V20 and a closing roller 7 for combining the upper fiber web with the unwinding product are arranged in sequence. The guide roller V20 is arranged near the discharge port of the carding machine, and the closing roller 7 is arranged above the discharge port of the inclined curtain 11. The closing roller 7 is arranged at the rear side of the flattening roller group 19.

[0096] A continuous passage for conveying the lower fiber web is formed between the drafting machine 5, the web curtain 14, the flat curtain 10 and the flattening roller group 19;

[0097] A continuous passage for conveying the unwinding product in the middle layer is formed between the unwinding machine 6, the guide roller I 15, the guide roller II 16, the guide roller III 17, the guide roller IV 18 and the flattening roller group 19;

[0098] A continuous passage for conveying the upper fiber web is formed between the carding machine II 3, the cloth guide roller V 20 and the web closing roller 7;

[0099] The flattening roller group 19 includes a cloth guide roller VII191 for pulling the unrolled product, a flattening roller 12 for flattening the middle layer of the unrolled product, and a cloth guide roller VIII192 for compounding the lower layer fiber web and the middle layer of the unrolled product. A continuous passage for conveying the unrolled product is formed between the lower side of the cloth guide roller VII191, the upper side of the flattening roller 12, and the lower side of the cloth guide roller VIII192.

[0100] Among them, the unwinding machine 6 is arranged on the unwinding platform 22, and the unwinding platform 22 is arranged above the drawing machine 5. On the one hand, it ensures that the unwinding machine 6 is arranged at a high position, so that the unwinding machine 6 has a certain horizontal height, which is convenient for stacking the middle layer unwinding product on the upper surface of the lower layer - fiber web I, to achieve effective compounding and transmission between the middle layer and the lower layer, and prevent wrinkles from occurring between the two, that is, indirectly ensure the stability and sustainability of the compounding process; on the other hand, this arrangement effectively saves production space and improves the efficient utilization rate of limited space.

[0101] The carding machine II3 is arranged on the carding platform 23, and the flat curtain 10 is arranged below the carding platform 23. On the one hand, the carding machine II3 is arranged at a high position, so that the discharge port of the carding machine II3 has a certain horizontal height, which is convenient for stacking the upper fiber web on the upper surface of the middle layer unwinding product, achieving effective compounding and transmission between the upper and middle layers, and preventing wrinkles on both, that is, indirectly ensuring the stability and sustainability of the compounding process; on the other hand, this arrangement effectively saves production space and improves the efficient utilization of limited space. Preferably, the carding platform 23 is arranged on the support column 24, ensuring that the carding platform 23 is arranged at a high position and facilitating the arrangement of the flat curtain 10.

[0102] The outlet curtain 14 is tilted downward to facilitate the stacking and lamination of the lower fiber web and the middle unwinding product in the upper feed section of the flat curtain 10. A conveyor curtain 25 is provided at the outlet of the carding machine II 3. The conveyor curtain 25 is tilted downward and extends toward the outlet of the diagonal curtain 11. The conveyor curtain 25 is located in front of the station of the diagonal curtain 11.

[0103] In addition, the distance between the cloth guide roller VII 191 and the oblique curtain 11 is greater than the distance between the cloth guide roller VIII 192 and the oblique curtain 11 .

[0104] The outer diameter of the cloth guide roller VII 191 is smaller than the outer diameter of the flattening roller 12 , and the outer diameter of the cloth guide roller VIII 192 is smaller than the outer diameter of the flattening roller 12 .

[0105] Example 5

[0106] Based on Examples 1-4, this embodiment provides: a control method suitable for the production of composite spunlace non-woven fabrics, comprising:

[0107] S1: Input the web speed of carding machine I, web width of carding machine I, web laying machine draft ratio, web laying layer number and web laying machine web width through the human-machine interface, and calculate through the PLC controller to obtain the web laying machine web speed;

[0108] The web speed of the web laying machine = web speed of the carding machine I * web width of the carding machine I * web laying machine draft ratio / number of web laying layers / web laying machine web width. For example, if the web speed of the carding machine I is 95 m / min, the web width of the carding machine I is 3.5 m, the web laying machine draft ratio is 107%, the number of web laying layers is 4, and the web laying machine web width is 3.9 m, then the web laying machine speed = 95 * 3.5 m * 107% / 4 / 3.9 = 22.8 m / min.

[0109] S2: Input the drafting ratio of the drafting machine through the human-machine interface. According to the obtained web-laying machine web speed and the drafting machine draft ratio, the PLC controller calculates the web-laying machine web speed.

[0110] Among them, the web speed of the drafting machine = the web speed of the web laying machine * the drafting ratio of the drafting machine. For example, if the web speed of the web laying machine is 25m / min and the drafting ratio of the drafting machine is set to 200%, then the web speed of the drafting machine = 25 * 200% = 50m / min;

[0111] S3: Input the flat curtain draft ratio through the human-machine interface. According to the obtained drawing machine speed and flat curtain draft ratio, the flat curtain conveying speed is calculated by the PLC controller.

[0112] Among them, flat curtain conveying speed = drawing machine net speed * flat curtain draft ratio;

[0113] S4: Input the diagonal curtain draft ratio through the human-machine interface. According to the obtained flat curtain conveying speed and diagonal curtain draft ratio, the diagonal curtain conveying speed is calculated by the PLC controller.

[0114] Among them, the conveying speed of the inclined curtain = the conveying speed of the flat curtain * the draft ratio of the inclined curtain;

[0115] S5: Input the net curtain draft ratio through the human-machine interface, and calculate the net curtain conveying speed through the PLC controller according to the obtained inclined curtain conveying speed and the net curtain draft ratio;

[0116] Among them, the conveying speed of the net curtain = the conveying speed of the inclined curtain * the draft ratio of the net curtain;

[0117] S6: Input the draft ratio of the spunlace pre-wet curtain through the human-machine interface. According to the obtained net curtain conveying speed and the draft ratio of the spunlace pre-wet curtain, the PLC controller calculates the conveying speed of the spunlace pre-wet curtain.

[0118] Among them, the conveying speed of the spunlace pre-wet curtain = the conveying speed of the net curtain * the draft ratio of the spunlace pre-wet curtain;

[0119] S7: Input the draft ratio of the hydroentanglement machine drum through the human-machine interface. According to the obtained hydroentanglement pre-wet curtain conveying speed and the draft ratio of the hydroentanglement machine drum, the PLC controller calculates the running speed of the hydroentanglement machine drum.

[0120] Among them, the running speed of the hydroentanglement machine drum = the conveying speed of the hydroentanglement pre-wet curtain * the draft ratio of the hydroentanglement machine drum;

[0121] The control method further includes:

[0122] Input the flattening roller draft ratio through the human-machine interface. Based on the obtained diagonal curtain conveying speed and the flattening roller draft ratio, the PLC controller calculates the flattening roller running speed. The flattening roller running speed = diagonal curtain conveying speed * flattening roller draft ratio.

[0123] Input the draft ratio of the carding machine II through the human-machine interface. Based on the obtained inclined curtain conveying speed and the draft ratio of the carding machine II, the PLC controller calculates the carding machine II web output speed. Wherein, the carding machine II web output speed = inclined curtain conveying speed * carding machine II draft ratio;

[0124] Input the unwinder draft ratio through the human-machine interface. Based on the obtained hydroentanglement machine drum speed and unwinder draft ratio, the unwinder unwinding speed is calculated through the PLC controller. Among them, the unwinder unwinding speed = hydroentanglement machine drum speed * unwinder draft ratio.

[0125] Furthermore, the wrap angle between the unwinding product and the flattening roller is controlled to be 90-270°.

[0126] Furthermore, the speed ratio between the running speed of the flattening roller and the conveying speed of the inclined curtain is controlled to be 1.0-1.1.

[0127] Furthermore, the speed ratio between the unwinding speed of the unwinder and the running speed of the hydroentanglement machine drum is controlled to be 0.95-1.05.

[0128] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention falls within the scope of protection of the present invention.

Claims

1. A control system suitable for a composite spunlace nonwoven fabric production process, characterized by: The invention is provided in a preparation system of a composite spunlace nonwoven fabric, wherein the preparation system of the composite spunlace nonwoven fabric comprises an opener (1), a carding machine I (2), a carding machine II (3), a web laying machine (4), a drafting machine (5), an unwinding machine (6), a web closing roller (7), a spunlace machine (8) and a drying machine (9), wherein the carding machine I (2) is provided at the rear side of the workstation of the opener (1), the web laying machine (4) is provided at the rear side of the workstation of the carding machine I (2), The drafting machine (5) is arranged at the rear side of the working station of the web laying machine (4), a flat curtain (10) is provided at the rear side of the working station of the drafting machine (5), a slanted curtain (11) is provided at the rear side of the working station of the flat curtain (10), a flattening roller (12) is provided next to the slanted curtain (11), a closing curtain (13) is provided at the rear side of the working station of the slanted curtain (11), a closing roller (7) is provided between the closing curtain (13) and the slanted curtain (11), a spunlace machine (8) is arranged at the rear side of the working station of the closing curtain (13), a spunlace pre-wetting curtain and a rotary drum are provided in the spunlace machine (8), a drying machine (9) is arranged at the rear side of the working station of the spunlace machine (8), and a continuous passage for forming and conveying the lower fiber web is formed between the opening machine (1), the carding machine I (2), the web laying machine (4), the drafting machine (5), the flat curtain (10), the slanted curtain (11) and the closing roller (7); The unwinding machine (6) is arranged at the front side of the flattening roller (12), and a continuous passage for conveying the intermediate layer unwinding product is formed between the unwinding machine (6), the flattening roller (12) and the closing roller (7); The carding machine II (3) is arranged at the rear side of the workstation of the opening machine (1), and the carding machine II (3) is located at the front side of the workstation of the web closing roller (7), and a continuous passage for forming and conveying the upper fiber web is formed between the opening machine (1), the carding machine II (3) and the web closing roller (7); A continuous passage for closing the web, spunlacing, and drying the composite spunlaced nonwoven fabric is provided between the web closing roller (7), the web closing curtain (13), the spunlacing machine (8), and the drying machine (9); The control system includes a PLC controller (26), the PLC controller (26) is connected to a human-machine interface (27) via a data input interface, the PLC controller (26) is connected to a data acquisition unit (28) via a data feedback interface, and the PLC controller (26) is connected to an execution unit (29) via a data output interface; The PLC controller (26) includes a carding machine I web output speed control unit (260), a web laying machine web output speed control unit (261), a drafting machine web output speed control unit (262), a flat curtain conveying speed control unit (263), a slanted curtain conveying speed control unit (264), a closing curtain conveying speed control unit (265), a spunlace pre-wet curtain conveying speed control unit (266), a spunlace machine drum operating speed control unit (267), a flattening roller operating speed control unit (268), a carding machine II web output speed control unit (269), and an unwinding machine unwinding speed control unit (270).

2. The control system for a composite spunlace nonwoven fabric production process according to claim 1, characterized in that: The web output speed control unit (260) of the carding machine I comprises a carding speed receiving module of the carding machine I (2) and a web output speed communication module of the carding machine I (2), wherein the carding speed receiving module of the carding machine I (2) is connected to the human-machine interface (27); The web laying machine web output speed control unit (261) comprises a web laying layer number receiving module, a web laying width receiving module, a web laying machine (4) draft ratio receiving module, a carding machine I (2) web output speed receiving module, a web laying machine (4) web output speed calculation module and a web laying machine (4) web output speed communication module; the web laying layer number receiving module, the web laying width receiving module and the web laying machine (4) draft ratio receiving module are all connected to the human-machine interface (27), and the carding machine I (2) web output speed receiving module is connected to the carding machine I (2) web output speed communication module; The drawing machine web output speed control unit (262) comprises a drawing machine (5) drawing ratio receiving module, a web laying machine (4) web output speed receiving module, a drawing machine (5) web output speed calculation module and a drawing machine (5) web output speed communication module; the web laying machine (4) web output speed receiving module is connected to the web laying machine (4) web output speed communication module, and the drawing machine (5) drawing ratio receiving module is connected to the human-machine interface (27); A flat curtain conveying speed control unit (263) comprises a flat curtain (10) draft ratio receiving module, a drafting machine (5) web output speed receiving module, a flat curtain (10) conveying speed calculation module, and a flat curtain (10) conveying speed communication module; the drafting machine (5) web output speed receiving module is connected to the drafting machine (5) web output speed communication module, and the flat curtain (10) draft ratio receiving module is connected to the human-machine interface (27); The inclined curtain conveying speed control unit (264) comprises an inclined curtain (11) draft ratio receiving module, a flat curtain (10) conveying speed receiving module, an inclined curtain (11) conveying speed calculation module and an inclined curtain (11) conveying speed communication module; the flat curtain (10) conveying speed receiving module is connected to the flat curtain (10) conveying speed communication module, and the inclined curtain (11) draft ratio receiving module is connected to the human-machine interface (27); A net curtain conveying speed control unit (265) comprises a net curtain (13) draft ratio receiving module, a tilt curtain (11) conveying speed receiving module I, a net curtain (13) conveying speed calculation module and a net curtain (13) conveying speed communication module; the tilt curtain (11) conveying speed receiving module I is connected to the tilt curtain (11) conveying speed communication module, and the net curtain (13) draft ratio receiving module is connected to a human-machine interface (27); A spunlace pre-wet curtain conveying speed control unit (266): comprising a spunlace pre-wet curtain draft ratio receiving module, a mesh curtain (13) conveying speed receiving module I, a spunlace pre-wet curtain conveying speed calculation module, and a spunlace pre-wet curtain conveying speed communication module; the mesh curtain (13) conveying speed receiving module I is connected to the mesh curtain (13) conveying speed communication module, and the spunlace pre-wet curtain draft ratio receiving module is connected to the human-machine interface (27); The spunlace machine drum operation speed control unit (267) comprises a spunlace machine (8) drum draft ratio receiving module, a spunlace pre-wet curtain conveying speed receiving module, a spunlace machine (8) drum operation speed calculation module, and a spunlace machine (8) drum operation speed communication module; the spunlace pre-wet curtain conveying speed receiving module is connected to the spunlace pre-wet curtain conveying speed communication module, and the spunlace machine (8) drum draft ratio receiving module is connected to the human-machine interface (27); A flattening roller operating speed control unit (268) includes a flattening roller (12) draft ratio receiving module, a slanting curtain (11) conveying speed receiving module II, a flattening roller (12) operating speed calculation module, and a flattening roller (12) operating speed communication module; the slanting curtain (11) conveying speed receiving module II is connected to the slanting curtain (11) conveying speed communication module, and the flattening roller (12) draft ratio receiving module is connected to the human-machine interface (27); The carding machine II web output speed control unit (269) comprises a carding machine II (3) draft ratio receiving module, a closing curtain (13) conveying speed receiving module II and a carding machine II (3) web output speed calculation module; the closing curtain (13) conveying speed receiving module II is connected to the closing curtain (13) conveying speed communication module, and the carding machine II (3) draft ratio receiving module is connected to the human-machine interface (27); The unwinding machine unwinding speed control unit (270) comprises an unwinding machine (6) draft ratio receiving module, a water spunlace machine (8) drum operating speed receiving module, an unwinding machine (6) unwinding speed calculation module and an unwinding machine (6) unwinding speed communication module; the water spunlace machine (8) drum operating speed receiving module is connected to the water spunlace machine (8) drum operating speed communication module, and the unwinding machine (6) draft ratio receiving module is connected to the human-machine interface (27).

3. The control system for a composite spunlace nonwoven fabric production process according to claim 2, characterized in that: The PLC controller (26) further includes an alarm unit (271).

4. The control system for a composite spunlace nonwoven fabric production process according to claim 3, characterized in that: The data acquisition unit (28) is provided in a composite spunlace non-woven fabric preparation system, and the data acquisition unit (28) includes a sensor group (280) for data acquisition and transmission in the composite spunlace non-woven fabric production process; The execution unit (29) is provided in a system for preparing a composite spunlace non-woven fabric, and the execution unit (29) includes a device group (290) for preparing the composite spunlace non-woven fabric.

5. The control system for the composite spunlace nonwoven fabric production process according to claim 4, characterized in that: The sensor group (280) includes a tachometer I (2800) connected to the flattening roller (12), a tachometer II (2801) connected to the unwinding machine (6), and a tachometer III (2803) connected to the rotating drum of the water spunlace machine (8), wherein the tachometer I (2800) is connected to the flattening roller running speed control unit (268), the tachometer II (2801) is connected to the unwinding machine unwinding speed control unit (270), and the tachometer III (2803) is connected to the rotating drum running speed control unit (267) of the water spunlace machine.

6. The control system for a composite spunlace nonwoven fabric production process according to claim 4, characterized in that: The equipment group (290) includes a spreading motor (2900) for driving the flattening roller (12), an unwinding motor (2901) for driving the unwinding machine (6), and a drum motor (2902) for driving the drum of the water spunlace machine (8). The spreading motor (2900) is connected to the flattening roller (12) operating speed communication module via the frequency converter I, the unwinding motor (2901) is connected to the unwinding speed communication module via the frequency converter II, and the drum motor (2902) is connected to the water spunlace machine (8) drum operating speed communication module via the frequency converter III.

7. The control system for a composite spunlace nonwoven fabric production process according to any one of claims 1 to 6, characterized in that: In the preparation system of the composite spunlace nonwoven fabric, a net-out curtain (14) for conveying the lower fiber web is provided at the discharge port of the drawing machine (5), and the net-out curtain (14) is provided at the front side of the station of the flat curtain (10); the unwinding product on the unwinding machine (6) extends toward the feed port of the flat curtain (10); the upper fiber web at the discharge port of the carding machine II (3) extends toward the discharge port of the oblique curtain (11); In the conveying direction of the unwinding product, a guide roller I (15), a guide roller II (16), a guide roller III (17), a guide roller IV (18) and a flattening roller group (19) for compounding the lower fiber web with the unwinding product are arranged in sequence, the guide roller I (15) is arranged near the discharge port of the unwinding machine (6), the guide roller II (16) is arranged above the discharge port of the net curtain (14), the guide roller III (17) is arranged above the feed port of the flat curtain (10), and the guide roller IV (18) is arranged above the discharge port of the flat curtain (10), and the guide roller III (17) and the guide roller IV (18) are arranged in parallel in the horizontal direction, and the horizontal plane where the guide roller III (17) and the guide roller IV (18) are located is parallel to the horizontal plane where the flat curtain (10) is located; the inclined curtain (11) is arranged in an inclined upward direction, and the flattening roller group (19) is arranged directly above the surface where the inclined curtain (11) is located; A cloth guide roller V (20) and a web closing roller (7) for combining the upper fiber web with the unwinding product are sequentially arranged in the conveying direction of the upper fiber web. The cloth guide roller V (20) is arranged near the discharge port of the carding machine II (3). The web closing roller (7) is arranged above the discharge port of the inclined curtain (11). The web closing roller (7) is arranged at the rear side of the workstation of the flattening roller group (19). A continuous passage for conveying the lower fiber web is formed between the drafting machine (5), the web curtain (14), the flat curtain (10) and the flattening roller group (19); A continuous passage for conveying the unwinding product in the middle layer is formed between the unwinding machine (6), the cloth guide roller I (15), the cloth guide roller II (16), the cloth guide roller III (17), the cloth guide roller IV (18) and the flattening roller group (19); A continuous passage for conveying the upper fiber web is formed between the carding machine II (3), the cloth guide roller V (20) and the web closing roller (7); The flattening roller group (19) includes a cloth guide roller VII (191) for pulling the unrolled product, a flattening roller (12) for flattening the middle layer unrolled product, and a cloth guide roller VIII (192) for compounding the lower layer fiber web and the middle layer unrolled product. A continuous passage for conveying the unrolled product is formed between the lower side of the cloth guide roller VII (191), the upper side of the flattening roller (12), and the lower side of the cloth guide roller VIII (192).

8. The control system for the composite spunlace nonwoven fabric production process according to claim 7, characterized in that: The unwinding machine (6) is arranged on the unwinding platform (22), and the unwinding platform (22) is arranged above the drafting machine (5); the carding machine II (3) is arranged on the carding platform (23), and the flat curtain (10) is arranged below the carding platform (23).

9. The control system for the composite spunlace nonwoven fabric production process according to claim 7, characterized in that: The mesh curtain (14) is arranged downwardly in an inclined manner; a conveying mesh curtain (25) is provided at the discharge port of the carding machine II (3), the conveying mesh curtain (25) is arranged downwardly in an inclined manner, extends toward the discharge port of the oblique curtain (11), and is arranged at the front side of the station of the oblique curtain (11).

10. The control system for the composite spunlace nonwoven fabric production process according to claim 7, characterized in that: The distance between the cloth guide roller VII (191) and the oblique curtain (11) is greater than the distance between the cloth guide roller VIII (192) and the oblique curtain (11), the outer diameter of the cloth guide roller VII (191) is smaller than the outer diameter of the flattening roller (12), and the outer diameter of the cloth guide roller VIII (192) is smaller than the outer diameter of the flattening roller (12).

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