A film coating device for waterproof fabric processing and an operating method thereof

Abstract

The application relates to a film coating device for waterproof fabric processing and an operation method thereof, and relates to the waterproof fabric film coating processing field. The device comprises a hot pressing mechanism, a rack, winding mechanisms and unwinding mechanisms arranged on the two sides of the hot pressing mechanism, a plurality of traction rollers arranged between the unwinding mechanism and the hot pressing mechanism, a bidirectional air exhaust roller, a directional air extraction mechanism and a positioning roller. The traction rollers are used for traction of the base cloth and the film. The bidirectional air exhaust roller is used for generation of directional air flow flowing to the two sides of the film along the transverse direction. The directional air extraction mechanism is used for generation of directional air flow parallel to the film and opposite to the film transmission direction. The device utilizes the air flow along the longitudinal direction of the film to realize the effect of transverse flattening of the film. The air flow opposite to the film transmission direction and parallel to the film is utilized to realize the effect of longitudinal flattening of the film. In the state of ensuring the tension of the film, the probability of film deformation caused by excessive tension is reduced, and the stability of the laminating processing of the film and the base cloth is comprehensively improved.

Description

Technical Field

[0001] This invention belongs to the field of waterproof fabric coating processing, specifically a coating device for waterproof fabric processing and its operating method. Background Technology

[0002] Existing waterproof fabrics mainly include high-density waterproof fabrics, coated waterproof fabrics, and laminated waterproof fabrics. Among them, laminated waterproof fabrics are made by bonding single or multiple layers of waterproof membranes with a base fabric structure through a pressure-bearing process. During the production process, a hot melt adhesive laminating machine is needed to apply adhesive and laminate the membrane and the base fabric. Existing hot melt adhesive laminating machines mainly include modules such as an unwinding mechanism, a traction mechanism, an adhesive application mechanism, a hot pressing mechanism, and a winding mechanism.

[0003] To ensure a smooth and even bonding between the film and the base fabric, it is necessary to maintain tension, flatness, and no shifting during the traction process. However, compared to the fabric, the film is thinner and therefore more sensitive to tension changes. Directly tensioning the film using traction rollers can easily lead to excessive tension, which can not only cause the film edges to curl narrow during transport but may even cause the film to deform due to longitudinal stretching, thus affecting the quality of the finished product. To address these issues, this invention provides a laminating device and its operating method for processing waterproof fabrics. Summary of the Invention

[0004] The purpose of this invention is to address the problems in the prior art by providing a coating device and its operation method for processing waterproof fabrics.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] A coating device for processing waterproof fabric includes a hot pressing mechanism, a frame, a winding mechanism and an unwinding mechanism located on both sides of the hot pressing mechanism, and also includes a plurality of traction rollers, a bidirectional exhaust roller, a directional air extraction mechanism and a positioning roller disposed between the unwinding mechanism and the hot pressing mechanism.

[0007] The traction roller is used to pull the base fabric and the film, the bidirectional exhaust roller is used to generate directional airflow that flows laterally to both sides of the film, the directional air extraction mechanism is used to generate directional airflow that is parallel to the film and flows in the opposite direction to the film transport direction, and the positioning roller is used to pre-press the base fabric and the film together.

[0008] As a further optimization of the present invention, the bidirectional exhaust roller includes a central tube, with connecting seats rotatably connected to both sides of the central tube, and a rotating roller provided on the outer side of each of the two connecting seats. The connecting seats have several air ducts arranged in a ring array and connected to the central tube inside, and the outer wall of the rotating roller has exhaust grooves corresponding to the air ducts. The radial dimension of the central tube is smaller than the radial dimension of the rotating roller. The air duct has a two-section bent structure, and the section near the exhaust groove has a horizontal structure.

[0009] As a further optimization of the present invention, the directional air extraction mechanism includes an air inlet hood, a pressure roller is provided at the air inlet of the air inlet hood, the pressure roller works with the rotating roller to position the film, and a ventilation plate is provided at the air outlet of the air inlet hood, the ventilation plate has a V-shaped structure and several evenly distributed through slots are provided on both sides.

[0010] As a further optimization of the present invention, the outer sides of the central tube and the air inlet hood are provided with air ducts for connecting to external air circulation equipment, and one end of the glue spraying mechanism is connected to an external glue supply device.

[0011] As a further optimization of the present invention, there are two positioning rollers, which are used to pre-press the base fabric and the film from both sides.

[0012] As a further optimization of the present invention, a support roller is provided between the glue spraying mechanism and the directional air extraction mechanism, and a scraper is provided above the support roller. The scraper is made of plastic and works with the support roller to smooth the film.

[0013] A method for operating a coating apparatus for processing waterproof fabrics includes the following steps:

[0014] S1. The base fabric roll and the film roll are respectively installed on a rotating shaft of the unwinding mechanism. The free end of the film is pulled so that the film is wound around the corresponding traction roller, then passes between the bidirectional exhaust roller and the directional air extraction mechanism, and finally passes under the glue spraying mechanism.

[0015] S2. The free end of the base fabric is pulled so that the base fabric is wrapped around the corresponding traction roller and passes over the glue spraying mechanism. After aligning the free end of the base fabric with the free end of the film, the aligned free end is pulled through between the two positioning rollers, then pulled through the heat pressing mechanism, and finally fixed on the winding mechanism.

[0016] S3. First, turn on the air circulation equipment to generate directional airflow through the bidirectional exhaust roller and directional suction mechanism to level the film. Then, operate the external drive equipment to drive the unwinding mechanism, bidirectional exhaust roller, and winding mechanism, while simultaneously turning on the glue spraying mechanism and hot pressing mechanism to begin continuous transfer of the base fabric and film. The base fabric and film are then sequentially subjected to glue spraying, pre-pressing, hot pressing, and winding processes.

[0017] The beneficial effects of this invention are as follows:

[0018] This coating device for waterproof fabric processing utilizes the reverse directional airflow output from the bidirectional exhaust roller to apply equal and opposite forces to the film, effectively pulling the film to both sides and flattening it laterally. Simultaneously, the directional air extraction mechanism generates directional airflow that can pull the film upward when the film tension is insufficient, achieving the effect of longitudinally flattening the film. This comprehensively reduces the probability of wrinkles or shifts in the film due to insufficient tension during transmission, and also avoids the probability of curling or deformation due to excessive tension, effectively solving the problems mentioned in the background technology. Attached Figure Description

[0019] Figure 1 This is a front view of the coating device;

[0020] Figure 2 This is a rear view of the coating device.

[0021] Figure 3 This is a schematic diagram of the overall structure of the coating device;

[0022] Figure 4 This is a schematic diagram showing the cooperation between the bidirectional exhaust roller and the directional air extraction mechanism;

[0023] Figure 5 This is a partial cross-sectional view of the bidirectional exhaust roller;

[0024] Figure 6 This is a partial cross-sectional view of the directional air extraction mechanism.

[0025] In the diagram: 1. Hot pressing mechanism; 2. Rewinding mechanism; 3. Frame; 4. Unwinding mechanism; 5. Traction roller; 6. Bidirectional exhaust roller; 601. Center tube; 602. Connecting seat; 603. Rotary roller; 604. Air duct; 605. Exhaust groove; 7. Directional air extraction mechanism; 701. Air inlet hood; 702. Pressure roller; 703. Ventilation plate; 8. Air duct; 9. Glue spraying mechanism; 10. Glue supply equipment; 11. Positioning roller; 12. Support roller; 13. Scraper; 14. Air circulation equipment. Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0027] Example 1

[0028] like Figure 1-6As shown, the waterproof fabric processing coating device of this embodiment includes a hot pressing mechanism 1, a frame 3, a winding mechanism 2 and an unwinding mechanism 4 located on both sides of the hot pressing mechanism 1, and also includes a plurality of traction rollers 5, a bidirectional exhaust roller 6, a directional air extraction mechanism 7 and a positioning roller 11 disposed between the unwinding mechanism 4 and the hot pressing mechanism 1.

[0029] The traction roller 5 is used to pull the base fabric and the film, the bidirectional exhaust roller 6 is used to generate directional airflow that flows laterally to both sides of the film, the directional air extraction mechanism 7 is used to generate directional airflow that is parallel to the film and flows in the opposite direction to the film transport direction, and the positioning roller 11 is used to pre-press the base fabric and the film together.

[0030] The film is wound around the outside of the bidirectional exhaust roller 6 and continuously conveyed. The airflow output by the bidirectional exhaust roller 6 to both sides can apply a force of the same magnitude but opposite direction to the film, which can flatten the film to both sides and level it laterally. Similarly, the directional airflow generated by the directional air extraction mechanism 7 can apply a force to the fabric in the opposite direction of the conveying direction, thereby achieving the effect of leveling the film longitudinally. When the base fabric loses tension due to unstable conveying, this reaction force can pull the locally loose fabric, keeping the film conveyed to the glue spraying position flat. In the process of leveling the film by airflow in the transverse and longitudinal directions, the airflow does not directly impact the film. Compared with the existing traction and contact tensioning methods, the probability of film deformation is greatly reduced while achieving the tensioning effect.

[0031] The bidirectional exhaust roller 6 includes a central tube 601, with connecting seats 602 rotatably connected to both sides of the central tube 601. A rotating roller 603 is provided on the outer side of each connecting seat 602. Several air ducts 604, arranged in a circular array and connected to the central tube 601, are opened inside the connecting seat 602. Exhaust grooves 605, corresponding one-to-one with the air ducts 604, are opened on the outer wall of the rotating roller 603. The radial dimension of the central tube 601 is smaller than the radial dimension of the rotating roller 603. The air duct 604 has a two-section bent structure, with the section near the exhaust groove 605 being horizontal. The airflow entering the central tube 601 passes through the air duct 604 and exits. The exited airflow flows directionally within the exhaust groove 605, applying forces of varying magnitudes and opposite directions to the film, achieving the effect of lateral leveling of the airflow.

[0032] The directional air extraction mechanism 7 includes an air inlet hood 701. A pressure roller 702 is provided at the air inlet of the air inlet hood 701. The pressure roller 702 works with a rotating roller 603 to position the film. A ventilation plate 703 is provided at the air outlet of the air inlet hood 701. The ventilation plate 703 has a V-shaped structure and several evenly distributed slots on both sides. The pressure roller 702 and the rotating roller 603 can position the film after it has been horizontally leveled by the bidirectional exhaust roller 6. When the fabric loses its tension, the airflow generated by the directional air extraction mechanism 7, which is parallel to the base fabric, can lift the fabric upwards. The lifted part is close to the directional air extraction mechanism 7 and away from the glue application position, so that the film can always remain flat. This helps to reduce the probability of the film wrinkling or shifting due to insufficient tension. During the air extraction process, the airflow must pass through the groove in the ventilation plate 703 before flowing to the air outlet, which can concentrate the airflow on the fabric surface and improve the uniformity of the airflow.

[0033] Both the central tube 601 and the air inlet hood 701 are provided with air ducts 8 for connecting to the external air circulation equipment 14. One end of the glue spraying mechanism 9 is connected to the glue supply equipment 10. Gas flows from the directional air extraction mechanism 7 to the air circulation equipment 14 and then is output from the bidirectional exhaust roller 7.

[0034] There are two positioning rollers 11, which are used to pre-press the base fabric and film from both sides. After the adhesive is applied, the film and the base fabric are transferred between the two positioning rollers 11. During the process of passing through the positioning rollers 11, the base fabric, adhesive layer and film are pressed into a whole, which can prevent the base fabric and film from being misaligned during the transfer process before hot pressing.

[0035] A support roller 12 is provided between the glue spraying mechanism 9 and the directional air extraction mechanism 7. A scraper 13 is provided above the support roller 12 and the scraper 13 is made of plastic. The scraper 13 works with the support roller 12 to smooth the film. If the film is loose or bulging in some areas, the scraper 13 can work with the support roller 12 to smooth the film before applying glue. The wrinkled parts are always concentrated between the pressure roller 702 and the scraper 13. Combined with the longitudinal leveling effect of the directional air extraction mechanism 7, the impact of local instability of the film on the overall transmission stability is reduced, which is conducive to restoring stability after adjustment.

[0036] A method for operating a coating apparatus for processing waterproof fabrics includes the following steps:

[0037] S1. The base fabric roll and the film roll are respectively installed on one of the rotating shafts of the unwinding mechanism 4. The free end of the film is pulled so that the film is wound around the corresponding traction roller 5, then passes between the bidirectional exhaust roller 6 and the directional air extraction mechanism 7, and finally passes under the glue spraying mechanism 9.

[0038] S2. The free end of the base fabric is pulled so that the base fabric is wrapped around the corresponding traction roller 5 and passes over the glue spraying mechanism 9. After aligning the free end of the base fabric with the free end of the film, the free end after being pulled and aligned passes between the two positioning rollers 11. Then it is pulled through the heat pressing mechanism 1 and finally fixed on the winding mechanism 2.

[0039] S3. First, turn on the air circulation device 14 to generate directional airflow from the bidirectional exhaust roller 6 and the directional air extraction mechanism 7 to level the film. Then, operate the external drive device to drive the unwinding mechanism 4, the bidirectional exhaust roller 6 and the winding mechanism 2, and at the same time turn on the glue spraying mechanism 9 and the hot pressing mechanism 1 to start the continuous transfer of the base fabric and the film, and sequentially perform glue spraying, pre-pressing, hot pressing and winding processes on the base fabric and the film.

[0040] The above-described embodiments are merely one implementation of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A film coating device for waterproof fabric processing, comprising a hot pressing mechanism (1), a rack (3), a winding mechanism (2) and a unwinding mechanism (4) located on both sides of the hot pressing mechanism (1), characterized in that, It also includes several traction rollers (5), bidirectional exhaust rollers (6), directional air extraction mechanism (7), glue spraying mechanism (9) and positioning rollers (11) located between the unwinding mechanism (4) and the hot pressing mechanism (1). The traction roller (5) is used to pull the base fabric and the film, the bidirectional exhaust roller (6) is used to generate a directional airflow that flows laterally to both sides of the film, the directional air extraction mechanism (7) is used to generate a directional airflow that is parallel to the film and flows in the opposite direction to the film transmission direction, and the positioning roller (11) is used to pre-press the base fabric and the film together. The bidirectional exhaust roller (6) includes a central tube (601), with connecting seats (602) rotatably connected to both sides of the central tube (601), and rotating rollers (603) provided on the outer sides of both connecting seats (602). Several air ducts (604) arranged in a ring array and connected to the central tube (601) are opened inside the connecting seat (602), and exhaust grooves (605) corresponding to the air ducts (604) are opened on the outer wall of the rotating roller (603). The radial dimension of the central tube (601) is smaller than the radial dimension of the rotating roller (603). The air duct (604) has a two-section bent structure and the section near the exhaust groove (605) has a horizontal structure. The directional air extraction mechanism (7) includes an air inlet hood (701), and a pressure roller (702) is provided at the air inlet of the air inlet hood (701). The pressure roller (702) works with a rotating roller (603) to position the film. A ventilation plate (703) is provided at the air outlet of the air inlet hood (701). The ventilation plate (703) has a V-shaped structure and several evenly distributed through slots are provided on both sides.

2. The film laminating device for waterproof fabric processing according to claim 1, characterized in that, The outer sides of the central tube (601) and the air inlet hood (701) are provided with air ducts (8) for connecting to an external air circulation device (14), and one end of the glue spraying mechanism (9) is connected to a glue supply device (10).

3. The coating device for processing waterproof fabric according to claim 1, characterized in that, There are two positioning rollers (11) for pre-pressing the base fabric and film from both sides.

4. The coating device for processing waterproof fabric according to claim 1, characterized in that, A support roller (12) is provided between the glue spraying mechanism (9) and the directional air extraction mechanism (7). A scraper (13) is provided above the support roller (12) and the scraper (13) is made of plastic. The scraper (13) works in conjunction with the support roller (12) to smooth the film.

5. A method for operating a coating apparatus for processing waterproof fabrics, based on the coating apparatus for processing waterproof fabrics according to any one of claims 1-4, characterized in that, Includes the following steps: S1. The base fabric roll and the film roll are respectively mounted on a rotating shaft of the unwinding mechanism (4). The free end of the film is pulled so that the film is wound around the corresponding traction roller (5), then passes between the bidirectional exhaust roller (6) and the directional air extraction mechanism (7), and finally passes under the glue spraying mechanism (9). S2, the free end of the base fabric is pulled so that the base fabric is wrapped around the corresponding traction roller (5) and passes over the glue spraying mechanism (9). After aligning the base fabric with the free end of the film, the free end after traction and alignment passes between the two positioning rollers (11), and then it is pulled through the heat pressing mechanism (1) and finally fixed on the winding mechanism (2). S3. First, turn on the air circulation device (14) to generate directional airflow from the bidirectional exhaust roller (6) and the directional air extraction mechanism (7) to flatten the film. Then, operate the external drive device to drive the unwinding mechanism (4), the bidirectional exhaust roller (6) and the winding mechanism (2), and at the same time turn on the glue spraying mechanism (9) and the heat pressing mechanism (1) to start the continuous transfer of the base fabric and the film, and sequentially perform glue spraying, pre-pressing, heat pressing and winding processes on the base fabric and the film.

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