A UD cloth compounding machine

Abstract

The utility model discloses a kind of UD cloth compound machines, including cloth platform, unwinding machine and composite device, the composite device includes first composite mechanism and second composite mechanism, the structure of the first composite mechanism and the second composite mechanism is same, the first composite mechanism includes support, movable rod, hydraulic cylinder, upper roll, lower roll and winding machine, the upper roll is fixed on the support, the movable rod is installed on the support, the lower roll is movably connected with the movable rod, the lower roll is located below the upper roll, the hydraulic cylinder has two, respectively installed in the both sides of the lower roll, the hydraulic cylinder is moved by telescoping, so that the lower roll can move up and down, when the hydraulic cylinder is stretched out, drive the lower roll upward movement, so that the lower roll is contacted with the upper roll, and extrusion force is formed between the upper roll and the lower roll. The utility model is set by two groups of hot-pressing roller, and the composite process is divided into two steps of film uncovering and compounding, avoids the problem that film cannot be uncovered and fiber cannot be solidified, and improves the qualified rate of compounding.

Description

Technical Field

[0001] This utility model relates to the field of UD composite fabric technology, specifically to an UD fabric composite machine. Background Technology

[0002] Non-woven fabric is a flexible composite material made from ultra-high-strength, high-modulus polyethylene fibers as the base material, through unidirectional parallel arrangement, thermoplastic resin bonding, and lamination processes. It is also known as UD fabric or unidirectional fabric. Currently, the mainstream non-woven fabrics both domestically and internationally use ultra-high molecular weight polyethylene fibers or aramid fibers as the base material. These fibers are uniformly laid using specialized equipment, impregnated with high-strength elastomer resin, coated with adhesive, and bonded into a thin film. Finally, they are laminated using 0° and 90° double orthogonal composite lamination to create a high-strength, lightweight bulletproof material, which is the core material for producing high-performance soft bulletproof vests. Non-woven fabric can quickly absorb and diffuse high-speed shock waves from bullets, exhibiting good ballistic protection performance.

[0003] When a fabric is impacted by a bullet or shrapnel, the stress wave is superimposed on the incident wave. The superimposed stress wave causes yarn breakage at the interlacing points, thus reducing the fabric's ballistic protection performance. In materials without interlacing points, such as non-woven fabrics, the stress wave can dissipate quickly, resulting in better ballistic protection.

[0004] Currently, the preparation of nonwoven fabric generally begins with the fabrication of a resin-impregnated unidirectional fabric. The fiber bundles are then evenly distributed and arranged parallel to each other along the width direction using a comb-type yarn layer, ensuring unidirectional fiber alignment. These unidirectional fibers are then impregnated in a resin bath and laid onto a film to support the fiber bundles. After drying, the unidirectional fabric is obtained. This unidirectional fabric is cut into fixed-length pieces, rotated 90°, and then orthogonally stacked with the unidirectional fabric and hot-pressed to form a composite. During the composite process, a film layer is removed to increase the fiber content of the nonwoven fabric, ultimately resulting in a nonwoven fabric with one film and two layers of fibers. Typically, the composite nonwoven fabric is further laminated to obtain a nonwoven fabric with one film and four layers of fibers, or even a higher number of layers, to further increase the fiber content and enhance its ballistic performance.

[0005] Because the lamination process uses a hot-pressing technique, which involves peeling off a film, the following issues arise: if the lamination temperature is too high, the film will melt and fuse with the fibers, making it impossible to peel off. If the temperature is too low, the adhesive on the fiber surface will not cure, causing the fibers to scatter during fabric cutting due to lack of restraint, affecting the quality of the pressed sheets. Different adhesives are used for non-woven fabrics in different applications, and the curing temperature and melting point of the adhesive are difficult to match with the melting point of the film, limiting the range of adhesives that can be used in non-woven fabric preparation. Utility Model Content

[0006] This invention addresses the aforementioned shortcomings of existing technologies by providing a UD fabric laminating machine. This laminating machine improves the lamination quality of non-woven fabrics by separately controlling the film peeling temperature and the glue melting temperature, and allows for a wider range of glues to be selected during the preparation of non-woven fabrics.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a UD fabric laminating machine, comprising a fabric laying table, an unwinding machine, and a laminating device. The laminating device includes a first laminating mechanism and a second laminating mechanism, which have the same structure. The first laminating mechanism includes a support, a movable rod, a hydraulic cylinder, an upper roller, a lower roller, and a winding machine. The upper roller is fixed on the support, the movable rod is mounted on the support, and the lower roller is movably connected to the movable rod. The lower roller is located below the upper roller. There are two hydraulic cylinders, which are respectively installed on both sides of the lower roller. The hydraulic cylinders extend and retract, enabling the lower roller to move up and down. When the hydraulic cylinder extends, it drives the lower roller to move upward, causing the lower roller to contact the upper roller and forming a squeezing force between the upper roller and the lower roller.

[0008] Preferably, the first composite mechanism further includes a control motor connected to the upper roller for controlling the composite speed.

[0009] Preferably, the first composite mechanism further includes a heat transfer oil inlet, which is connected to the lower roller and used to heat the lower roller.

[0010] Preferably, the hydraulic cylinder is a servo hydraulic cylinder with controllable pressure.

[0011] Preferably, the temperature of the lower roller of the first composite mechanism is lower than the temperature of the lower roller of the second composite mechanism.

[0012] Preferably, the tension of the winding machine and the unwinding machine is controlled by a magnetic tensioner.

[0013] Preferably, the heat transfer oil inlet is connected to the heat transfer oil heater.

[0014] Preferably, there are two movable rods, symmetrically distributed on both sides of the lower roller.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model divides the lamination process into two steps, namely film removal and hot pressing lamination, by setting two hot press rollers, which avoids the problems of not being able to remove the film and the fibers not being able to solidify together during the lamination process, thereby improving the production and qualification rate of lamination.

[0017] 2. By setting up low-temperature rollers and high-temperature rollers, this utility model increases the range of adhesives that can be selected for composite fabrics. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a front view of the present invention;

[0020] Figure 3 This is a partial view of the present invention.

[0021] In the diagram: 1-Fabric laying table; 101-Guide roller; 2-Unwinder; 3-First composite mechanism; 4-Second composite mechanism; 301-Support; 302-Modular rod; 303-Hydraulic cylinder; 304-Upper roller; 305-Lower roller; 306-Winding machine; 307-Control motor; 308-Heat transfer oil inlet. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1-3 As shown, the present invention provides a UD fabric laminating machine, including a fabric laying table 1, an unwinding machine 2, a first laminating mechanism 3, and a second laminating mechanism 4. The first laminating mechanism 3 and the second laminating mechanism 4 have the same structure. The fabric laying table 1 is used to place fabric pieces, and the unwinding machine 2 is used to place fabric rolls. The unwinding machine 2 controls the unwinding tension through a magnetic tension controller. During operation, the fabric is released through the unwinding machine 2. People located on both sides of the first laminating mechanism 3 manually arrange the fabric pieces on the fabric laid table 1 onto the fabric released by the unwinding machine 2. Then, the fabric passes through the hot pressing of the first laminating mechanism 3 and the second laminating mechanism 4 in sequence. The guide roller 101 is placed at the end of the fabric laying table 1 for the direction of the fabric.

[0024] The first composite mechanism 3 includes a support 301, an upper roller 304, and a movable rod 302 mounted on the support 301. Two hydraulic cylinders 303 are mounted on both sides of the support 301. The lower roller 305 is supported by the two hydraulic cylinders 303 on both sides. The movable rods 302 are connected to both sides of the lower roller 305, and the lower roller 305 can rotate around the movable rods 302. During operation, the hydraulic cylinders 303 lift the lower roller 305, and the lower roller 305 rotates around the movable rods 302 and contacts the upper roller 304 to form a compressive force. The hydraulic cylinders 303 are servo hydraulic cylinders, and their pressure is controllable. The upper roller 304 is connected to the control motor 307 and is the driving roller. The rotation speed of the upper roller 304 is controlled by the control motor 307. The lower roller 305 is the driven roller. After the lower roller 305 is pressed against the upper roller 304, the upper roller 304 drives the lower roller 305 to rotate. There is a heat transfer oil inlet 308 on one side of the lower roller 305. The heat transfer oil inlet 308 is connected to the heat transfer oil heater. The heat transfer oil inlet 308 is both an oil outlet and an oil inlet. The heat transfer oil passes through the heat transfer oil inlet 308. The oil is injected into the lower roller 305, which has a temperature controller to monitor its surface temperature and control the fabric lamination temperature. When the surface temperature of the lower roller 305 exceeds a set value, the heat transfer oil heater stops heating the oil. When the surface temperature of the lower roller 305 falls below the set value, the heat transfer oil heater heats the oil and injects the hot oil into the lower roller 305 through the heat transfer oil inlet 308, thereby increasing the temperature of the lower roller 305. A winding machine 306 is installed on one side of the first lamination mechanism 3. The winding machine 306 controls the winding tension through a magnetic tension controller.

[0025] During production, before preparing UD fabric, workers first make impregnated unidirectional fabric. Multiple rolls of ultra-high molecular weight polyethylene fibers are arranged in parallel unidirectional directions and bonded with thermoplastic resin. The fibers are then attached to the surface of a plastic film. The impregnated unidirectional fabric is cut into fabric pieces of a certain length and placed on the laying table 1. A whole roll of impregnated unidirectional fabric is placed on the unwinding machine 2. The unwinding machine 2 controls the unwinding speed of the fabric through tension. The unwound fabric is turned by the guide roller 101. Workers located on both sides of the laying table 1 manually lay the fabric pieces on the laying table 1 onto the fabric after passing through the guide roller 101, align the fabric pieces with the fabric, and control the overlap width between the fabric pieces according to quality requirements.

[0026] The heat transfer oil heater begins heating the heat transfer oil. The heated heat transfer oil is injected into the lower roller 305 through the heat transfer oil inlet 308, raising the temperature of the lower roller 305. Once the lower roller 305 reaches the set temperature, the hydraulic cylinder 303 is activated, causing the lower roller 305 to move upward and contact the upper roller 304, pressing them together. The pressure between the upper roller 304 and the lower roller 305 can be controlled by controlling the hydraulic cylinder 303. The aligned fabric is fed between the upper roller 304 and the lower roller 305, and the control motor 307 is activated, causing the upper roller 304 to rotate at a set speed. The upper roller 304 drives the lower roller 305 to rotate synchronously, and the fabric enters the first composite mechanism 3 at the same speed.

[0027] After the fabric is combined by the upper roller 304 and lower roller 305 of the first composite mechanism 3, the fabric sheet and the unidirectional fabric are combined together to form a composite fabric with 0° and 90° orthogonal arrangement. After hot pressing, the plastic film on the composite fabric is manually peeled off and wrapped around the winding machine 306. The winding machine 306 winds up the peeled film by controlling the tension.

[0028] The temperature and pressure of the first composite mechanism 3 and the second composite mechanism 4 can be controlled separately, with the temperature and pressure of the first composite mechanism 3 generally being lower than that of the second composite mechanism 4. After the UD fabric is laminated in the first composite mechanism 3, a thin film is peeled off, but the fibers in the laminated fabric are not firmly bonded. During subsequent use, the fibers are prone to scattering when the fabric is cut, affecting the quality of subsequent products. At this point, the laminated fabric from the first composite mechanism 3 is continued to the second composite mechanism 4 for a second lamination. After lamination under higher temperature and pressure, the fibers are more tightly cured. The laminated fabric is then wound up on the winding machine in the second composite mechanism 4. At this point, the entire production process is complete.

[0029] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A UD fabric laminating machine, comprising a fabric laying table, an unwinding machine, and a laminating device, characterized in that: The composite device includes a first composite mechanism and a second composite mechanism, which have the same structure. The first composite mechanism includes a support, a movable rod, a hydraulic cylinder, an upper roller, a lower roller, and a winding machine. The upper roller is fixed on the support, the movable rod is mounted on the support, and the lower roller is movably connected to the movable rod. The lower roller is located below the upper roller. There are two hydraulic cylinders, which are respectively mounted on both sides of the lower roller. The hydraulic cylinders extend and retract, enabling the lower roller to move up and down. When the hydraulic cylinder extends, it drives the lower roller to move upward, causing the lower roller to contact the upper roller and forming a squeezing force between the upper roller and the lower roller.

2. The UD fabric laminating machine as described in claim 1, characterized in that: The first composite mechanism also includes a control motor, which is connected to the upper roller and is used to control the composite speed.

3. The UD fabric laminating machine as described in claim 1, characterized in that: The first composite mechanism also includes a heat transfer oil inlet, which is connected to the lower roller and is used to heat the lower roller.

4. The UD fabric laminating machine as described in claim 1, characterized in that: The hydraulic cylinder is a servo hydraulic cylinder, and its pressure is controllable.

5. A UD fabric laminating machine as described in claim 3, characterized in that: The temperature of the lower roller of the first composite mechanism is lower than that of the lower roller of the second composite mechanism.

6. The UD fabric laminating machine as described in claim 1, characterized in that: The tension of the winding machine and the unwinding machine is controlled by a magnetic tensioner.

7. A UD fabric laminating machine as described in claim 3, characterized in that: The heat transfer oil inlet is connected to the heat transfer oil heater.

8. A UD fabric laminating machine as described in claim 1, characterized in that: There are two movable rods, symmetrically distributed on both sides of the lower roller.

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