Multifunctional lapping machine and multi-layer mixed-paving needle-punched non-woven fabric preparation system

Abstract

The utility model provides a multifunctional lapping machine and a multi-layer mixed paving needle punched non-woven fabric preparation system, the multifunctional lapping machine comprises a first conveyor belt and a second conveyor belt which are perpendicular to each other, the first conveyor belt is located above the second conveyor belt, and a moving mechanism is arranged below the first conveyor belt; an L-shaped third transmission belt is arranged between the first transmission belt and the second transmission belt, a stroke balance mechanism used for adjusting the L-shaped corner of the third transmission belt to be high inside and low outside is arranged at the L-shaped corner of the third transmission belt, and a telescopic mechanism is arranged on the third transmission belt, so that free switching of two lapping modes of straight lapping and cross lapping is achieved, and the purpose of one machine with multiple purposes is achieved. At least one of the first lapping machine, the second lapping machine and the third lapping machine of the multi-layer mixed-laying needle-punched non-woven fabric preparation system is a multifunctional lapping machine, direct laying and cross laying mixing can be achieved through combination of different lapping modes, the strength of the non-woven fabric is improved, and meanwhile the structure of the non-woven fabric is enriched.

Description

Technical Field

[0001] The utility model relates to the technical field of non-woven fabric preparation, in particular to a multifunctional web laying machine and a multi-layer mixed-lay needle-punched non-woven fabric preparation system. Background Art

[0002] Laying the web is an important step in the preparation process of needle-punched nonwoven fabrics. Commonly used laying methods include parallel laying (i.e. straight laying) and cross laying (i.e. cross laying). Usually, straight laying and cross laying need to be completed by different laying machines, that is, only one machine can be used for one purpose.

[0003] For needle-punched non-woven fabrics in different application scenarios, different web laying methods need to be achieved through different web laying machines, and whether it is straight-laid or cross-laid needle-punched non-woven fabrics, the preparation process also requires the use of shared equipment such as openers, carding machines, and needle punching machines. Therefore, in order to realize the preparation of straight-laid and cross-laid needle-punched non-woven fabrics respectively, it is necessary to set up different production lines or continuously replace the web laying machines on the production line. For setting up different production lines, not only is the floor space large, but the utilization rate of shared equipment such as openers, carding machines, and needle punching machines is low, which increases production costs; for constantly replacing the web laying machines on the production line, the production process is more cumbersome. Therefore, it is of great practical value to design a multifunctional web laying machine that can conveniently switch between straight-laid and cross-laid methods.

[0004] In addition, in order to meet people's daily needs, multi-layer needle-punched non-woven fabrics with diversified structures need to be continuously developed. The patent with application publication number CN111118736A discloses a method and equipment for glue-free needle-punched absorbent core, which includes an opener, a first vacuum cotton feeder, a first carding machine, a first web laying machine, a powder spreading machine, a barb machine, a second web laying machine, a powder spreading machine, a positive barb machine, a drying box, a compound machine and a winding machine connected in sequence, and also includes a second vacuum cotton feeder connected to the opener, the second vacuum cotton feeder is connected to the second carding machine, and the second carding machine is connected to the second web laying machine. Due to the single web laying method of the first web laying machine and the second web laying machine in the application, the prepared glue-free needle-punched absorbent core cannot meet the needs of structural diversification.

[0005] In view of this, it is necessary to design an improved multifunctional web laying machine and a multi-layer mixed needle-punched nonwoven fabric preparation system to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a multifunctional web laying machine and a multi-layer mixed needle-punched non-woven fabric preparation system. The multifunctional web laying machine is provided with an L-shaped third transmission belt and a telescopic mechanism so that the third transmission belt is pushed close to or pulled away from the second transmission belt, thereby realizing free switching between straight laying and cross laying, and achieving the purpose of "one machine with multiple uses". At least one of the first web laying machine, the second web laying machine and the third web laying machine of the multi-layer mixed needle-punched non-woven fabric preparation system is a multifunctional web laying machine. Through the combination of different web laying methods, a mixture of straight laying and cross laying can be realized, and the combination of non-woven and woven can be realized, thereby improving the strength of the non-woven fabric and enriching the structure of the non-woven fabric.

[0007] To achieve the above-mentioned purpose of the utility model, the utility model provides a multifunctional web laying machine, including a first conveyor belt and a second transmission belt arranged perpendicular to each other, the first conveyor belt is located diagonally above the second transmission belt, and a moving mechanism is provided below the first conveyor belt; an L-shaped third transmission belt is provided between the first conveyor belt and the second transmission belt, and a stroke balancing mechanism for adjusting the L-shaped corner of the third transmission belt to be higher inside and lower outside is provided at the L-shaped corner of the third transmission belt, and a telescopic mechanism for pushing the third transmission belt closer to or pulling it away from the second transmission belt is provided on the third transmission belt.

[0008] As a further improvement of the utility model, the telescopic mechanism includes a base, a telescopic rod and a driving mechanism; the driving mechanism is electrically connected to the telescopic rod; one end of the telescopic rod is connected to the base, and the other end is connected to the third transmission belt.

[0009] As a further improvement of the utility model, the telescopic mechanism further includes two brackets arranged at both ends of the third transmission belt and a connecting rod connecting the two brackets, and the telescopic rod is connected to the connecting rod.

[0010] As a further improvement of the present invention, the stroke balancing mechanism includes an inner support rod, an outer support rod and a rotating shaft for connecting the inner support rod and the outer support rod, which are vertically arranged above the L-shaped corner of the third transmission belt; the height of the inner support rod is greater than the height of the outer support rod.

[0011] As a further improvement of the present invention, the stroke balancing mechanism includes a special-shaped conveying roller arranged at the L-shaped corner of the third transmission belt, and the diameter of the special-shaped conveying roller located on the inner side of the L-shaped corner of the third transmission belt is larger than the diameter located on the outer side of the L-shaped corner of the third transmission belt.

[0012] As a further improvement of the present invention, the first conveyor belt includes a plurality of conveyor belts arranged in parallel up and down, and the moving mechanism is arranged on the conveyor belt located at the bottom.

[0013] The utility model also provides a multi-layer mixed-lay needle-punched non-woven fabric preparation system, comprising an opener, a carding machine, a first web laying machine, a pre-needling machine, a second web laying machine, a third web laying machine, a main needling machine, an ironing machine and a trimming and winding machine arranged in sequence; a first active unwinding machine is also provided at the input end of the first web laying machine, and a second active unwinding machine is also provided at the input end of the third web laying machine;

[0014] At least one of the first web laying machine, the second web laying machine and the third web laying machine is a multifunctional web laying machine.

[0015] As a further improvement of the present invention, a first clamping feeder is provided between the first active unwinding machine and the pre-needling machine.

[0016] As a further improvement of the present invention, a second clamping feeder is provided between the third web laying machine and the main needling machine.

[0017] As a further improvement of the present invention, the second web laying machine is a multifunctional web laying machine; the first web laying machine and the third web laying machine are straight web laying machines or cross web laying machines.

[0018] The beneficial effects of the utility model are:

[0019] (1) The multifunctional web laying machine provided by the utility model realizes free switching between straight laying and cross laying by arranging an L-shaped third transmission belt between the first conveyor belt and the second transmission belt which are arranged perpendicular to each other, and moving the third transmission belt through a telescopic mechanism so that the third transmission belt is pushed closer to or pulled away from the second transmission belt, thereby breaking through the bottleneck of "one machine for one purpose" of the web laying machine used in the traditional non-woven fabric preparation process and achieving the purpose of "one machine for multiple purposes". Straight laying or cross laying can be completed through one production line, which not only improves the utilization rate of the web laying machine, but also improves the utilization rate of the equipment that can be shared, such as the opening machine, the carding machine, the needle punching machine, etc., reduces the production cost, and reduces the floor space compared with two production lines.

[0020] (2) The multi-layer mixed-lay needle-punched non-woven fabric preparation system provided by the utility model has at least one of the first web laying machine, the second web laying machine, and the third web laying machine as a multifunctional web laying machine. Through the combination of different web laying methods, it can achieve a mixture of straight laying and cross laying, realize the combination of non-woven and woven, improve the strength of the non-woven fabric, and enrich the structure of the non-woven fabric. In addition, the multi-layer mixed-lay needle-punched non-woven fabric preparation system is also provided with a first active unwinding machine for laying the mesh gauze middle skeleton layer to further enhance the strength of the non-woven fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the multifunctional net laying machine of the utility model during direct laying.

[0022] Figure 2It is a structural schematic diagram of the multifunctional web laying machine of the utility model during web laying.

[0023] Figure 3 This is the position diagram when the third transmission belt is laid straight.

[0024] Figure 4 This is the position diagram when the third transmission belt is laid.

[0025] Figure 5 It is a structural schematic diagram of the stroke balancing mechanism in the first embodiment.

[0026] Figure 6 It is a structural schematic diagram of the stroke balancing mechanism in the second embodiment.

[0027] Figure 7 It is a structural schematic diagram of a multi-layer mixed needle-punched nonwoven fabric preparation system of the utility model.

[0028] Reference numerals

[0029] 1-first conveyor belt; 2-second conveyor belt; 3-third conveyor belt; 4-stroke balancing mechanism; 5-telescopic mechanism; 41-inner support rod; 42-outer support rod; 43-rotating shaft; 44-shaped conveyor roller; 51-base; 52-telescopic rod; 53-bracket; 54-connecting rod; 6-straight-laid fiber web; 7-cross-laid fiber web; 101-opening machine; 102-combing machine; 103-first web laying machine; 104-first active unwinding machine; 105-pre-needling machine; 106-second web laying machine; 107-second active unwinding machine; 108-third web laying machine; 109-main needling machine; 110-ironing machine; 111-edge trimming and winding machine; 112-first clamping and feeding machine; 113-second clamping and feeding machine. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0032] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0033] See also Figures 1 to 6 As shown, the utility model provides a multifunctional web laying machine, comprising a first conveyor belt 1 and a second conveyor belt 2 which are arranged perpendicular to each other, the first conveyor belt 1 is located obliquely above the second conveyor belt 2 (that is, the first conveyor belt 1 and the second conveyor belt 2 are staggered in the vertical direction), and a moving mechanism is provided below the first conveyor belt 1; an L-shaped third conveyor belt 3 is provided between the first conveyor belt 1 and the second conveyor belt 2, and a stroke balancing mechanism 4 for adjusting the L-shaped corner of the third conveyor belt 3 to be higher inside and lower outside is provided at the L-shaped corner of the third conveyor belt 3, and a telescopic mechanism 5 for pushing the third conveyor belt 3 closer to or pulling it away from the second conveyor belt 2 is provided on the third conveyor belt 3. The multifunctional web laying machine can freely switch the web laying mode through the telescopic mechanism 5 and the third conveyor belt 3. Specifically, Figure 1 As shown, when the telescopic mechanism 5 pushes the third transmission belt 3 close to the second transmission belt 2, one side of the L-shape of the third transmission belt 3 is parallel to the first transmission belt 1, and the other side is parallel to the second transmission belt 2, and the fiber web is transported from the first transmission belt 1 to the second transmission belt 2 through the third transmission belt 3, and the fiber web is directly laid on the third transmission belt 3 to form a directly laid fiber web 6, and is transported to the next process procedure through the third transmission belt 3; Figure 2 As shown, when the telescopic mechanism 5 pulls the third transmission belt 3 away from the second transmission belt 2, the third transmission belt 3 does not work at this time, and the moving mechanism drives the first conveyor belt 1 to move back and forth above the third transmission belt 3, and the fiber web is interleaved on the third transmission belt 3 to form an interleaved fiber web 7, which is then transported to the next process procedure through the third transmission belt 3. In this way, the web laying method can be freely switched through the telescopic mechanism 5 and the third transmission belt 3 to meet different needs.

[0034] like Figure 1 and Figure 2 As shown, the first conveyor belt 1 includes several conveyor belts arranged in parallel from top to bottom, and the fiber web bypasses several conveyor belts at the same time and is transmitted from top to bottom in sequence. With such an arrangement, the transportation of a longer fiber web can be achieved using a smaller space. The moving mechanism (not shown in the figure) is arranged on the conveyor belt located at the bottom, and drives the conveyor belt at the bottom to move back and forth above the third transmission belt 3 to achieve the cross-laying of the fiber web (the moving mechanism does not work when laying directly). In some embodiments, the moving mechanism is a moving connecting rod, and the reciprocating movement of the moving connecting rod drives the conveyor belt at the bottom to move back and forth above the third transmission belt 3; at this time, the moving connecting rod is connected to the frame of the edge of the bottom conveyor belt (the frame is fixed during the conveyor belt transmission process). In other embodiments, the bottom transmission is connected to another telescopic mechanism 5 to achieve its reciprocating motion. At this time, the telescopic mechanism 5 is connected to the frame of the edge of the bottom conveyor belt (the frame is fixed during the conveyor belt transmission process).

[0035] like Figure 3 and Figure 4As shown, the telescopic mechanism 5 includes a base 51, a telescopic rod 52 and a driving mechanism (not shown in the figure); the base 51 is used to install the telescopic rod 52, and the driving mechanism is electrically connected to the telescopic rod 52; one end of the telescopic rod 52 is connected to the base 51, and the other end is connected to the third transmission belt 3. The driving mechanism can be a driving motor. In this way, when the third transmission belt 3 needs to be pulled away from the second transmission belt 2, the driving mechanism drives the telescopic rod to contract and pull the third transmission belt 3 to a position away from the second transmission belt 2; when the third transmission belt 3 needs to be pushed closer to the second transmission belt 2, the driving mechanism drives the telescopic rod to extend and push the third transmission belt 3 above the second transmission belt 2. Since the third transmission belt 3 is located between the first transmission belt 1 and the second transmission belt 2, that is, the third transmission belt 3 is higher than the second transmission belt 2 and lower than the first transmission belt 1 in the vertical direction, the approach and withdrawal process of the third transmission belt 3 will not be restricted. When the third conveyor belt 3 is pushed above the second conveyor belt 2 , the fiber web will pass through the first conveyor belt 1 , the third conveyor belt 3 and the second conveyor belt 2 in sequence by virtue of the height difference among the first conveyor belt 1 , the third conveyor belt 3 and the second conveyor belt 2 .

[0036] The telescopic mechanism 5 also includes two brackets 53 arranged at both ends of the third transmission belt 3 and a connecting rod 54 connecting the two brackets 53, and the telescopic rod 52 is connected to the connecting rod 54. The brackets 53 are arranged vertically, and since the third transmission belt 3 and the second transmission belt 2 are at a certain distance in the vertical direction, the brackets 53 will not touch the second transmission belt 2. In this way, the driving mechanism drives the telescopic rod 52 to extend and retract, thereby driving the connecting rod 54 to reciprocate, and then drives the third transmission belt 3 to move. The bracket 53 is connected to the frame at the edge of the third transmission belt 3 (the frame is fixed during the transmission process of the third transmission belt 3, and the frame is not shown in the figure).

[0037] like Figure 5 As shown, in some embodiments, the stroke balancing mechanism 4 includes an inner support rod 41, an outer support rod 42, and a rotating shaft 43 for connecting the inner support rod 41 and the outer support rod 42, which are vertically arranged above the L-shaped corner of the third transmission belt 3; the height of the inner support rod 41 is greater than the height of the outer support rod 42; the inner support rod 41 and the outer support rod 42 are respectively connected to the frame at the edge of the third transmission belt 3 (the frame is fixed during the transmission process of the third transmission belt 3). In this way, when the fiber web passes through the L-shaped corner of the third transmission belt 3, the fiber web passes through the upper surface of the rotating shaft 43. Since the height of the inner support rod 41 is greater than the height of the outer support rod 42, the fiber web is inclined with the inner side higher and the outer side lower when passing through the L-shaped corner of the third transmission belt 3, so that the movement stroke of the fiber web on both sides along the width direction is equal, avoiding wrinkles at the corner. Since the third transmission belt 3 and the first transmission belt 1 are at a certain distance in the vertical direction, the inner support rod 41, the outer support rod 42 and the rotating shaft 43 will not touch the first transmission belt 1.

[0038] like Figure 6 As shown, in other embodiments, the stroke balancing mechanism 4 includes a special-shaped conveying roller 44 ( Figure 5 The conveying roller at the L-shaped corner of the third transmission belt 3 is not shown, and the conveying roller is a conventional conveying roller. The diameter of the special-shaped conveying roller 44 located at the inner end of the L-shaped corner of the third transmission belt 3 is larger than the diameter of the outer end of the L-shaped corner of the third transmission belt 3. In this way, the third transmission belt 3 is arranged at the L-shaped corner with the inner side higher and the outer side lower, so that the fiber web is inclined with the inner side higher and the outer side lower when passing through the L-shaped corner of the third transmission belt 3, so that the movement stroke of the fiber web on both sides along the width direction is equal, and wrinkles are avoided at the corner.

[0039] like Figure 7 As shown, the utility model also provides a multi-layer mixed needle-punched non-woven fabric preparation system, including an opener 101, a carding machine 102, a first web laying machine 103, a pre-needling machine 105, a second web laying machine 106, a third web laying machine 108, a main needling machine 109, an ironing machine 110 and a trimming and winding machine 111 arranged in sequence; a first active unwinding machine 104 is also provided at the input end of the first web laying machine 103, and a second active unwinding machine 107 is also provided at the input end of the third web laying machine 108; at least one of the first web laying machine 103, the second web laying machine 106 and the third web laying machine 108 is the multifunctional web laying machine described above, and different mechanisms are connected by conveyor belts.

[0040] The opener 101 is used for opening, mixing and removing impurities of the raw materials; the carding machine 102 is mainly used for further breaking up and mixing the fiber balls; the first web laying machine 103 is used for laying the fiber web; the first active unwinding machine 104 is used for further laying the mesh gauze on the fiber web, and the mesh gauze can be used as an intermediate skeleton layer to enhance the strength of the non-woven fabric; the pre-needling machine 105 is used for pre-needling the fiber web laid by the first web laying machine 103 and the mesh gauze laid by the first active unwinding machine 104 to achieve preliminary reinforcement; the second web laying machine 106 realizes web laying again; the second The active unwinding machine 107 is used to lay thin fiber webs of different materials, specifications or functions (the thin fiber web is a fiber web prepared in advance and wound on the second active unwinding machine 107, and is not a fiber web laid by a web laying machine) to increase the functionality of the prepared non-woven fabric; the third web laying machine 108 further realizes web laying; the main needling machine 109 is used to reinforce the multi-layer fiber web to form a multi-layer structure of a non-woven fabric, the ironing machine 110 is used to iron the prepared non-woven fabric, and the trimming and winding machine 111 is used to cut the prepared non-woven fabric into required specifications and wind it up.

[0041] A first clamping feeder 112 is provided between the first active unwinder 104 and the pre-needling machine 105. The first clamping feeder 112 is used to compact the fiber web laid by the first web laying machine 103 and the mesh gauze laid by the first active unwinder 104, and has a certain buffering effect before entering the pre-needling machine 105; a second clamping feeder 113 is provided between the third web laying machine 108 and the main needling machine 109. The second clamping feeder 113 is used to further compact the material released by the third web laying machine 108, and has a certain buffering effect before entering the main needling machine 109, providing favorable conditions for needling reinforcement.

[0042] In some embodiments, the second web laying machine 106 is a multifunctional web laying machine; the first web laying machine 103 and the third web laying machine 108 are straight-laying web laying machines or cross-laying web laying machines. The first web laying machine 103 and the third web laying machine 108 can be straight-laying web laying machines or cross-laying web laying machines at the same time, or the first web laying machine 103 and the third web laying machine 108 can be different web laying machines.

[0043] The following is an example of preparing a non-woven fabric with a specific structure.

[0044] When the second web laying machine 106 is a multifunctional web laying machine, and the first web laying machine 103 and the third web laying machine 108 are both direct-laying web laying machines, the preparation process of the multi-layer mixed needle-punched non-woven fabric is as follows: the opener 101 opens, mixes and removes impurities from the cotton fibers, the carding machine 102 cardes the cotton fiber web (first layer structure) and then conveys it to the first web laying machine 103, and at the same time, the first active unwinding machine 104 also conveys the mesh gauze (second layer structure) as the intermediate skeleton layer to the first web laying machine 103, and the mesh gauze released by the first active unwinding machine 104 is directly laid on the cotton fiber web conveyed by the carding machine 102; it is further conveyed to the first clamping feeding machine 112, and the first clamping feeding machine 112 compacts it to provide a certain amount of relief for the subsequent process; it is further conveyed to the pre-needling machine 105 for pre-needling to achieve preliminary reinforcement; then the pre-needling The double-layer structure after needle punching is conveyed to the second web laying machine 106 (i.e., the multifunctional web laying machine) and outputted through the interleaving method to obtain an interleaved structure; the interleaved structure is further conveyed to the third web laying machine 108, and at the same time, the thin fiber web with different functionalities (the third layer structure) released by the second active unwinding machine 107 is also conveyed to the third web laying machine 108, and the functional thin fiber web released by the second active unwinding machine 107 is directly laid on the interleaved structure conveyed by the second web laying machine 106; it is then conveyed to the second clamping feeder 113, and the second clamping feeder 113 compacts it to provide a certain amount of buffering force for the subsequent process; then the main needling machine 109 reinforces the multi-layer structure to form a multi-layer mixed needle-punched non-woven fabric; the ironing machine 110 irons the multi-layer mixed needle-punched non-woven fabric, and finally it is cut into the required specifications and rolled up by the trimming and winding machine 111.

[0045] Since the multi-layer mixed-laid needle-punched nonwoven fabric prepared by the present application realizes the combination of straight-laid and cross-laid methods, and the multi-layer structure is reinforced multiple times, even if the cotton fiber with lower strength is used, the obtained nonwoven fabric still has strong strength. It can be seen that the preparation system of the present application can not only realize the needle-punched reinforcement of long chemical fibers, but also realize the needle-punched reinforcement of cotton fibers.

[0046] To sum up, the utility model provides a multifunctional web laying machine and a multi-layer mixed needle-punched non-woven fabric preparation system. The multifunctional web laying machine is equipped with an L-shaped third transmission belt and a telescopic mechanism so that the third transmission belt can be pushed closer to or pulled away from the second transmission belt, thereby realizing free switching between straight laying and cross laying, thereby achieving the purpose of "one machine for multiple uses"; at least one of the first web laying machine, the second web laying machine, and the third web laying machine of the multi-layer mixed needle-punched non-woven fabric preparation system is a multifunctional web laying machine, which can achieve a mixture of straight laying and cross laying through a combination of different web laying methods, thereby realizing the combination of non-woven and woven fabrics, improving the strength of the non-woven fabric, and enriching the structure of the non-woven fabric.

[0047] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A multifunctional web laying machine, characterized in that: It includes a first conveyor belt and a second conveyor belt which are arranged perpendicular to each other, the first conveyor belt is located obliquely above the second conveyor belt, and a moving mechanism is provided below the first conveyor belt; an L-shaped third conveyor belt is provided between the first conveyor belt and the second conveyor belt, and a stroke balancing mechanism for adjusting the L-shaped corner of the third conveyor belt to be higher inside and lower outside is provided at the L-shaped corner of the third conveyor belt, and a telescopic mechanism for pushing the third conveyor belt closer to or pulling it away from the second conveyor belt is provided on the third conveyor belt.

2. The multifunctional web laying machine according to claim 1, characterized in that: The telescopic mechanism comprises a base, a telescopic rod and a driving mechanism; the driving mechanism is electrically connected to the telescopic rod; one end of the telescopic rod is connected to the base, and the other end is connected to the third transmission belt.

3. The multifunctional web laying machine according to claim 2, characterized in that: The telescopic mechanism further comprises two brackets arranged at two ends of the third transmission belt and a connecting rod connecting the two brackets, and the telescopic rod is connected to the connecting rod.

4. The multifunctional web laying machine according to claim 1, characterized in that: The stroke balancing mechanism includes an inner support rod and an outer support rod vertically arranged above the L-shaped corner of the third transmission belt, and a rotating shaft for connecting the inner support rod and the outer support rod; the height of the inner support rod is greater than the height of the outer support rod.

5. The multifunctional web laying machine according to claim 1, characterized in that: The stroke balancing mechanism includes a special-shaped conveying roller arranged at the L-shaped corner of the third transmission belt, and the diameter of the special-shaped conveying roller located inside the L-shaped corner of the third transmission belt is larger than the diameter located outside the L-shaped corner of the third transmission belt.

6. The multifunctional web laying machine according to claim 1, characterized in that: The first conveyor belt includes a plurality of conveyor belts arranged in parallel up and down, and the moving mechanism is arranged on the conveyor belt located at the bottom.

7. A multi-layer mixed needle-punched nonwoven fabric preparation system, characterized in that: It includes an opener, a carding machine, a first web laying machine, a pre-needling machine, a second web laying machine, a third web laying machine, a main needling machine, an ironing machine and a trimming and winding machine which are arranged in sequence; a first active unwinding machine is also provided at the input end of the first web laying machine, and a second active unwinding machine is also provided at the input end of the third web laying machine; At least one of the first web laying machine, the second web laying machine and the third web laying machine is a multifunctional web laying machine.

8. The multi-layer mixed needle-punched nonwoven fabric preparation system according to claim 7, characterized in that: A first clamping feeder is provided between the first active unwinding machine and the pre-needling machine.

9. The multi-layer mixed needle-punched nonwoven fabric preparation system according to claim 7, characterized in that: A second clamping feeder is provided between the third web laying machine and the main needling machine.

10. The multi-layer mixed needle-punched nonwoven fabric preparation system according to claim 7, characterized in that: The second web laying machine is a multifunctional web laying machine; the first web laying machine and the third web laying machine are straight web laying machines or cross web laying machines.

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