Thermal melt composite device for textile composites

Abstract

The utility model discloses a kind of textile composite material hot melt composite devices, including unwinding roller group, hot composite roller group, winding roller;The unwinding roller group includes the first unwinding roller for installing bearing base layer roll and the second unwinding roller for installing to be combined flexible layer roll;The first unwinding roller, second unwinding roller and winding roller are all driven by independent driving device;With the region of the superposition section cloth distribution of the hot composite roller group inlet material side is provided with first perception unit, and it is located in the side of to be combined flexible layer, and with the driving module of second unwinding roller cooperates and controls the unwinding tension of to be combined flexible layer;First perception unit is provided with cloth guide bar between hot composite roller group, the cloth guide bar has smooth surface, and with to be combined flexible layer is attached to form relative sliding.This utility model is through active control tension wrinkle and the cooperation of mechanical structure isolation fold transmission, realize the stable production of high-quality composite product.

Description

Technical Field

[0001] This utility model relates to the field of composite material manufacturing technology, and in particular to a hot melt composite device for textile composite materials. Background Technology

[0002] In the production of textile composite materials (such as composite fiber fabrics), it is often necessary to laminate extremely soft, low-strength flexible functional layers, such as hot melt fabric (hot melt adhesive web), with conventional textile load-bearing base layers. During unwinding and conveying, the flexible functional layers are highly susceptible to vibration, tensile deformation, and even breakage due to uneven or insufficient tension, resulting in ripples and wrinkles before lamination. In existing technologies, unwinding tension control is inaccurate, and tension zones couple and interfere with each other, causing wrinkles to be transmitted to the lamination station as soon as they form, resulting in product scrap. Therefore, there is an urgent need for a high-precision lamination device that can actively prevent, suppress in real time, and effectively isolate wrinkles. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a hot melt composite device for textile composite materials, which achieves stable production of high-quality composite products by actively regulating tension to prevent wrinkles and mechanically isolating wrinkle transmission.

[0004] Technical Solution: To achieve the above objectives, this utility model provides a textile composite material hot-melt lamination device, comprising an unwinding roller group, a hot-laden lamination roller group, and a take-up roller; the unwinding roller group includes a first unwinding roller for mounting a base material roll and a second unwinding roller for mounting a flexible layer roll to be laminated; the hot-laden lamination roller group is used to hot-press the two layers of material after lamination; the take-up roller is used to take up the laminated fabric; the first unwinding roller, the second unwinding roller, and the take-up roller are all driven by independent drive devices; a first sensing unit is provided in the area corresponding to the lamination section of fabric on the feed side of the hot-laden lamination roller group, and is located on the side where the flexible layer to be laminated is located; it is used to track the lamination state of the lamination section of fabric and coordinate with the drive module of the second unwinding roller to control the unwinding tension of the flexible layer to be laminated; a guide rod is provided between the first sensing unit and the hot-laden lamination roller group, the guide rod having a smooth surface and being in contact with the flexible layer to be laminated to form relative sliding.

[0005] Furthermore, the wrap angle of the flexible layer to be laminated relative to the guide rod on the infeed side is smaller than the wrap angle on the outfeed side.

[0006] Furthermore, the first sensing unit includes several image acquisition modules, and the multiple image acquisition modules constitute an image acquisition array covering the width direction of the flexible layer to be composited.

[0007] Furthermore, the unwinding path of the flexible layer to be laminated passes through the outer circumference of the substrate roll and maintains contact with it during transport to achieve pre-lamination.

[0008] Furthermore, a second sensing unit is also provided along the unwinding path of the flexible layer to be composited. The first sensing unit and the second sensing unit are respectively located on the front and rear sides of the first unwinding roller, and work together with the drive module of the second unwinding roller to regulate the unwinding tension of the flexible layer to be composited.

[0009] Furthermore, the second sensing unit includes several image acquisition modules, and the multiple image acquisition modules constitute an image acquisition array covering the width direction of the flexible layer to be composited.

[0010] Furthermore, a third sensing unit and a fourth sensing unit are respectively provided on the front and rear sides of the thermal composite roller assembly, and they work in coordination with the drive modules of the first unwinding roller and the winding roller to regulate the inlet tension and outlet tension of the composite section fabric.

[0011] Furthermore, both the third and fourth sensing units employ floating rollers with pressure sensors mounted on bearing seats, and the roller surfaces of both floating rollers are in contact with the supporting base layer.

[0012] Beneficial Effects: This utility model discloses a textile composite material hot-melt lamination device. Through "visual inspection + feedforward control," it intervenes before wrinkles occur, and combines this with "mechanical filtering" to suppress wrinkles during transmission, achieving dual anti-wrinkle protection and greatly improving product flatness. Multi-segment independent closed-loop tension control combined with tension range isolation design ensures stable tension throughout the entire process from unwinding to rewinding, solving the problem of tension coupling oscillation in traditional equipment. It is particularly suitable for laminating easily deformable, low-strength ultra-thin hot-melt films and other flexible functional layers with various load-bearing base layers, expanding the equipment's process range. It fundamentally avoids lamination defects caused by tension mismatch and wrinkles, producing composite fabrics with high bonding strength, good hand feel, and no defects. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structural layout of a hot melt composite device according to an embodiment of the present invention. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] As attached Figure 1The aforementioned textile composite material hot melt lamination device includes an unwinding roller group, a hot lamination roller group, and a take-up roller; the unwinding roller group includes a first unwinding roller 1 for mounting a roll of material carrying the base layer 41 and a second unwinding roller 2 for mounting a roll of material to be laminated into a flexible layer 42; the hot lamination roller group 7 is used to hot press the two layers of materials after lamination; the take-up roller 3 is used to take up the laminated fabric 4.

[0016] In this system, the first unwinding roller 1, the second unwinding roller 2, and the take-up roller 3 are all driven by independent drive devices to achieve controllable tension adjustment in different zones. Preferably, all three are driven by servo motors controlled by a PLC, and all three adopt torque control mode. Their rotational speed is passively calculated based on the corresponding real-time roll diameter and set tension and follows the main line speed. This enables automatic tension adjustment along the entire composite process, forming the main framework of a constant tension control mode for the entire line.

[0017] A first sensing unit 5 is provided in the area corresponding to the overlapping section of fabric on the feed side of the thermal composite roller group 7, and is located on the side where the flexible layer 42 to be composited is located; it is used to track the overlapping state of the overlapping section of fabric, that is, whether wrinkles are generated due to tension mismatch, and coordinates with the drive module of the second unwinding roller 2 to regulate the unwinding tension of the flexible layer 42 to be composited, so as to make the tension between the two overlapping fabric layers match, thereby achieving the purpose of eliminating wrinkles.

[0018] A guide rod 10 is provided between the first sensing unit 5 and the thermal composite roller group 7. The guide rod 10 has a smooth surface and is attached to the flexible layer 42 to be composited to form a relative sliding relationship. The friction of the guide rod 10 effectively isolates the tension interference between its upstream and downstream regions, allowing the control system to independently and precisely adjust the tension on both sides in a closed loop. At the same time, it also prevents the transmission of the formed wrinkles from its upstream to its downstream. The essence of wrinkles is the three-dimensional spatial deformation caused by the instability of the material due to compression in a relaxed state, or the inward contraction of the elastic material under tension. When such a material with transverse ripples attempts to bypass the guide rod 10, its movement path is forcibly constrained to the two-dimensional cylindrical surface of the guide rod. In order to conform to this smooth fixed curved surface, the material must be "ironed". The peaks of the wrinkles are pressed by the surface of the guide rod, and the material is forced to extend circumferentially, which itself consumes the deformation energy of the wrinkles and directly inhibits its three-dimensional shape.

[0019] The first sensing unit 5 and the driving device of the second unwinding roller 2 constitute a feedforward-feedback composite control system, used to regulate the unwinding tension of the roll of the flexible layer 42 to be composited in the early stage when wrinkles are generated upstream of the guide rod 10. Preferably, the first sensing unit 5 includes a plurality of image acquisition modules, and the plurality of image acquisition modules constitute an image acquisition array covering the width direction of the flexible layer 42 to be composited.

[0020] For example, 3-5 industrial cameras can be evenly arranged along the width of the flexible layer 42 to be laminated, and all industrial cameras can maintain a vertical distance equal to that of the flexible layer 42 to be laminated, so that the camera field of view covers the entire width of the fabric, track the lamination state of the flexible layer 42 to be laminated relative to the supporting base layer 41, judge the pre-lamination quality of the two, and ensure that wrinkles are reliably intercepted and eliminated.

[0021] When the camera detects wrinkles forming, upstream of the guide rod, the system, based on the camera signal, increases the tension of the flexible layer by slowing down the second unwinding roller. This newly established, higher upstream tension comes into play when the loose, wrinkled material enters the wrap angle region of the guide rod. According to Euler's formula, friction transmits this increased tension to the contact arc between the material and the guide rod. This friction acts on the wrinkled area, generating a longitudinal tensile force and a transverse flattening force, thus unfolding the wrinkles. The fixed surface of the guide rod, acting as a constant velocity reference (relative velocity zero), forcibly smooths out these minute local velocity differences through friction with the material, making the material leaving the guide rod more uniform in velocity, thereby eliminating the driving force for new wrinkle formation.

[0022] This involves using an industrial camera for recognition and feedforward control to achieve active visual wrinkle prevention, thus preventing wrinkle formation at the source. The guide rod 10 then provides a mechanical filtering effect. Even if micro-wrinkles enter the guide rod area, the guide rod, through its fixed smooth surface, provides a path constraint effect and a friction flattening effect, which converts the upstream adjusted tension into longitudinal stretching and lateral flattening forces on the wrinkles. This prevents the wrinkles from being transmitted to the downstream composite workstation, fundamentally avoiding composite defects caused by tension mismatch and wrinkles.

[0023] Preferably, the wrap angle of the flexible layer 42 to be laminated relative to the guide rod 10 on the infeed side is smaller than the wrap angle on the outfeed side. This increases the frictional damping on the outfeed side and enhances the isolation effect on tension fluctuations downstream of the guide rod 10.

[0024] In this embodiment, the flexible layer 42 to be laminated is a hot-melt fabric, and the supporting base layer 41 is a high-dimension woven fiber fabric. The unwinding path of the flexible layer 42 to be laminated passes through the outer circumference of the roll of the supporting base layer 41 and maintains contact with it during transport to achieve pre-lamination. This allows the hot-melt fabric to quickly overlap with the fiber fabric as soon as it is unwound, avoiding the hot-melt film from being stretched, broken, or undergoing lateral shrinkage during excessively long free transport, which could lead to uneven spreading and wrinkling.

[0025] By attaching the hot melt fabric tightly to the flat and sturdy fiber fabric roll, it provides a perfect mobile support platform. The hot melt fabric is "captured" and adhered to the fiber fabric the moment it is unfolded, without any chance to shake, shrink or deform in a free state, thus achieving near-perfect spreading and alignment.

[0026] It also includes a second sensing unit 6, as shown in the attached diagram. Figure 1 As shown, along the unwinding path of the flexible layer 42 to be composited, the first sensing unit 5 and the second sensing unit 6 are located on the front and rear sides of the first unwinding roller 1, respectively, and work together with the drive module of the second unwinding roller 2 to regulate the unwinding tension of the flexible layer 42 to be composited.

[0027] Preferably, the second sensing unit 6 also includes several image acquisition modules, and is also arranged at a certain vertical height from the fabric surface of the flexible layer 42 to be composited, and is evenly distributed along its width direction. The multiple image acquisition modules constitute an image acquisition array covering the width direction of the flexible layer 42 to be composited. The image acquisition module can also be an industrial camera.

[0028] The second sensing unit 6 determines whether the tension of the flexible layer 42 is too high by tracking the degree to which the mesh openings of the entire width of the flexible layer 42 are stretched before it is stacked with the base layer 41. It then reduces the unwinding tension of the flexible layer 42 by increasing the unwinding speed of the second unwinding roller 2. The first sensing unit 5 then tracks and observes whether wrinkles are generated after the flexible layer 42 is stacked with the base layer 41 to determine whether the tension is too low. It then increases the unwinding tension of the flexible layer 42 by decreasing the unwinding speed of the second unwinding roller 2. The two sensing units work together to achieve dynamic adjustment of the unwinding tension of the flexible layer 42.

[0029] The thermal composite roller assembly 7 has a third sensing unit 8 and a fourth sensing unit 9 respectively located on its front and rear sides. These units work in conjunction with the drive modules of the first unwinding roller 1 and the take-up roller 3 to regulate the inlet and outlet tensions of the composite section fabric. In this embodiment, the guide rod 10 is positioned between the first sensing unit 5 and the third sensing unit 8.

[0030] That is, independent sensing units are configured before and after the guide rod 10, so as to divide the fabric before and after the guide rod 10 in the production line into "flexible layer unwinding tension zone" and "composite tension zone".

[0031] Based on this, the thermal composite roller group 7 includes a heated steel roller and a pressure rubber roller. The thermal composite roller group 7 serves as the main drive roller, with a constant rotational speed set to the overall line speed benchmark. The take-up roller 3 adopts a torque control mode, its rotational speed passively calculated based on the real-time roll diameter and set tension, and follows the main line speed to ensure constant take-up tension and prevent disturbance to the tension in the composite zone. This effectively divides the entire production line fabric into a "take-up zone," a "composite tension zone," and a "flexible layer unwinding tension zone," ensuring that these three zones do not disturb each other, thereby fundamentally eliminating the possibility of wrinkles being transmitted to the composite station after they are generated. This optimizes the production quality and stability of the composite material.

[0032] Both the third sensing unit 8 and the fourth sensing unit 9 employ floating rollers with pressure sensors mounted on bearing seats, and the roller surfaces of both floating rollers are in contact with the supporting base layer 41. They not only serve as tension sensing units but also as tension buffer nodes in the entire composite path, thereby responding to sudden tension changes and further preventing disturbances to adjacent tension zones.

[0033] The above are merely preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A thermal melt bonding device for textile composite materials, comprising: The unwinding roll assembly includes a first unwinding roll (1) for mounting the roll of the base layer (41) and a second unwinding roll (2) for mounting the roll of the flexible layer (42) to be laminated. The hot composite roller assembly (7) is used to hot press the two layers of materials after they are stacked together. A winding roller (3) is used to wind up the composite fabric (4). Its features are: The first unwinding roller (1), the second unwinding roller (2), and the take-up roller (3) are all driven by independent drive devices; A first sensing unit (5) is provided in the area corresponding to the overlapping section of the fabric on the feed side of the thermal composite roller group (7), and is located on the side where the flexible layer (42) to be composited is located; it is used to track the overlapping state of the overlapping section of the fabric and to coordinate with the drive module of the second unwinding roller (2) to control the unwinding tension of the flexible layer (42) to be composited; A guide rod (10) is provided between the first sensing unit (5) and the thermal composite roller group (7). The guide rod (10) has a smooth surface and is attached to the flexible layer (42) to be composited to form relative sliding.

2. The textile composite material hot melt bonding device according to claim 1, characterized in that: The wrap angle of the flexible layer (42) to be laminated relative to the guide rod (10) on the feed side is smaller than the wrap angle on the discharge side.

3. The textile composite material hot melt bonding device according to claim 2, characterized in that: The first sensing unit (5) includes several image acquisition modules, and the multiple image acquisition modules constitute an image acquisition array covering the width direction of the flexible layer (42) to be composited.

4. The textile composite material hot melt bonding device according to claim 3, characterized in that: The unwinding path of the flexible layer (42) to be laminated passes through the outer circumference of the bearing base layer (41) roll and is conveyed in contact with it to achieve pre-lamination.

5. The textile composite material hot melt bonding device according to claim 4, characterized in that: A second sensing unit (6) is also provided. Along the unwinding path of the flexible layer (42) to be composited, the first sensing unit (5) and the second sensing unit (6) are located on the front and rear sides of the first unwinding roller (1) respectively, and work together with the drive module of the second unwinding roller (2) to regulate the unwinding tension of the flexible layer (42) to be composited.

6. The textile composite material hot melt bonding device according to claim 5, characterized in that: The second sensing unit (6) includes several image acquisition modules, and the multiple image acquisition modules constitute an image acquisition array covering the width direction of the flexible layer (42) to be composited.

7. A textile composite material hot melt bonding device according to claim 1 or 5, characterized in that: The front and rear sides of the thermal composite roller group (7) are respectively provided with a third sensing unit (8) and a fourth sensing unit (9), which work together with the drive modules of the first unwinding roller (1) and the winding roller (3) to regulate the inlet tension and outlet tension of the composite section fabric.

8. The textile composite material hot melt bonding device according to claim 7, characterized in that: The third sensing unit (8) and the fourth sensing unit (9) both adopt floating rollers with pressure sensors on the bearing seats, and the roller surfaces of the two floating rollers are in contact with the bearing base layer (41).

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