A fiber and fabric coating apparatus

Abstract

The utility model relates to the technical field of coating equipment provides a kind of fibre and fabric coating equipment, heating assembly is evenly arranged in first box, coating roller is located on first box, coating roller can rotate about its axis, and dip coating medium in the rotating process, coating roller is equipped with uniform heating part, heating mechanism is used to provide heat to heating assembly and uniform heating part, the utility model makes its temperature controllable by directly heating coating medium, cooperate with the coating roller with heating function, reduce the temperature fluctuation of coating medium, avoid the fluctuation of coating medium viscosity or film-forming property change, effectively improve sizing rate, adopt the way of gravity type automatic liquid supplement and liquid level monitoring, avoid the phenomenon that coating medium produces foam in production process, avoid the introduction of external impurities.

Description

Technical Field

[0001] This utility model relates to the field of coating equipment technology, and in particular to a fiber and fabric coating equipment. Background Technology

[0002] In the application of fibers and fabrics, surface coatings are often required to functionalize them, improve their mechanical properties, or enhance their processability in subsequent production stages. Based on the type of medium, commonly used coatings can be divided into oil-based coatings and water-based coatings, such as water emulsions. Regardless of whether it's an oil-based or water-based coating, temperature control of the coating medium is crucial during the fiber or fabric coating process. For oil-based coating media, temperature fluctuations can cause significant viscosity fluctuations, thus affecting the sizing rate of the oil-based coating on the fiber or fabric. For water-based coating media, the medium temperature affects the density and uniformity (film-forming properties) of the coating film formed on the fiber or fabric.

[0003] Existing equipment for coating fibers or fabrics primarily consists of a temperature-controlled main medium tank and a coating roller. The coating roller is in contact with or immersed in the coating medium. Auxiliary components include an external medium tank, a circulating pump system, a heating system, a motor and control system, and a main frame. The coating roller is driven by a motor to rotate, continuously drawing coating medium from the main medium tank for coating the fiber or fabric product. The temperature of the coating medium is controlled by the heating system within the main medium tank and preheated by an external heating system. Simultaneously, the coating medium is circulated through a pump in a pipeline system connecting the bottom of the main medium tank and the external medium tank to maintain the temperature and liquid level of the coating medium within the main medium tank. New coating medium can also be replenished to the system via the external medium tank.

[0004] However, existing technologies and equipment exhibit some shortcomings when applied to oil-based coating media with high viscosity-temperature sensitivity and water-based coating media with high film-forming-temperature sensitivity:

[0005] 1. The system is greatly affected by ambient temperature, resulting in poor temperature control of the coating medium and significant temperature fluctuations. Although the coating medium is preheated in an external medium tank and then its temperature is controlled by a heating system at the bottom of the main medium tank, temperature fluctuations occur during the transport of the coating medium from the external medium tank to the main medium tank via the pipeline system. More importantly, when the coating medium is picked up from the main medium tank by the coating roller and before it is coated onto the fiber or fabric, the coating medium on the surface of the coating roller, due to its thinness, is highly susceptible to the influence of ambient temperature and the surface temperature of the coating roller. This causes fluctuations in the viscosity of this portion of the coating medium (for oily media) or changes in film-forming properties (for water-based media). Since this portion of the coating medium will be directly coated onto the fiber or fabric, it directly affects the sizing rate of the product, thereby impacting product quality.

[0006] 2. The media delivery in the system is highly unstable. Because the circulation of the coating medium between the main medium tank and the external medium tank is achieved by a transfer pump, there is a situation where, when the viscosity or concentration (for water-based media) of the coating medium is high or the surface activity is low, the transfer pump exerts a shearing effect on the coating medium, which can cause a large amount of foam to be generated in some types of coating media, affecting the implementation of the coating process.

[0007] 3. Because the oil tank is open, impurities, fibers, or lint from fabric products fall into the main medium tank and flow to the external medium tank through the return pipe. Over time, this accumulation can cause blockages in the delivery pump and pipelines, and in severe cases, cause the delivery pump to seize up and stop. Utility Model Content

[0008] The purpose of this invention is to provide a fiber and fabric coating device to solve the problems in the prior art. It can effectively ensure the temperature stability of the coating medium applied to fibers or fabrics, reduce temperature fluctuations, and improve the sizing rate.

[0009] This utility model provides a fiber and fabric coating device, comprising:

[0010] The first box has an open top and contains a coating medium inside;

[0011] Heating components are evenly distributed within the first chamber and are used to heat the coating medium.

[0012] The coating assembly includes a coating roller and a drive unit. The coating roller is disposed on the first housing and can rotate around its axis. During rotation, the coating roller picks up the coating medium. The coating roller is provided with a heat equalization section. The drive unit is used to drive the coating roller to rotate.

[0013] A heating mechanism is used to provide heat to the heating assembly and the heat spreader.

[0014] In the fiber and fabric coating equipment described above, preferably, the coating roller has a receiving cavity inside, the heat equalization section includes a heat-conducting medium disposed in the receiving cavity, and the heating mechanism heats the heat-conducting medium.

[0015] In the fiber and fabric coating equipment described above, preferably, the coating roller is connected to a rotary joint at both ends along the axial direction, and the rotary joint is used to connect the receiving cavity and the heating mechanism.

[0016] In the fiber and fabric coating equipment described above, preferably, the heating component includes a plurality of heating tubes spaced apart within the first housing, the plurality of heating tubes being interconnected, and the heating tubes containing a heat-conducting medium.

[0017] In the fiber and fabric coating equipment described above, preferably, the coating equipment further includes a second box communicating with the first box, the second box being higher than the first box, heating components connected to the heating mechanism being uniformly arranged inside the second box, and an opening and closing component being provided between the first box and the second box.

[0018] In the fiber and fabric coating equipment described above, preferably, a first liquid level sensor, a second liquid level sensor, and a temperature sensor are respectively provided in the first housing and the second housing. The first liquid level sensor is used to detect the high liquid level of the coating medium, the second liquid level sensor is used to detect the low liquid level of the coating medium, and the temperature sensor is used to detect the temperature of the coating medium.

[0019] In the fiber and fabric coating equipment described above, preferably, the opening and closing element includes a solenoid valve, the input end of which is electrically connected to the output ends of the first liquid level sensor and the second liquid level sensor.

[0020] In the fiber and fabric coating equipment described above, preferably, both the first box and the second box are double-layered structures, and the double-layered structures are provided with a heat-insulating filling layer.

[0021] In the fiber and fabric coating equipment described above, preferably, pressure bars are provided on both sides of the first housing, and both pressure bars can move up and down relative to the coating roller.

[0022] In the fiber and fabric coating equipment described above, preferably, the coating equipment further includes a base for supporting the first box, the second box, and the coating components. Support rods are provided on both sides of the base, and a pressure rod passes through the support rods. Adjusting nuts are provided on the upper and lower sides of the support rods respectively.

[0023] Compared with the prior art, this utility model makes the temperature of the coating medium controllable by directly heating it. Combined with a coating roller with heating function, it reduces the temperature fluctuation of the coating medium, avoids the fluctuation of the coating medium viscosity or changes in film-forming properties, and effectively improves the sizing rate. It adopts gravity-type automatic liquid replenishment and liquid level monitoring to avoid the phenomenon of foaming of the coating medium during the production process and avoids the introduction of external impurities. Attached Figure Description

[0024] Figure 1 This is a perspective view of the fiber and fabric coating equipment provided in an embodiment of this utility model;

[0025] Figure 2 This is a front view of the fiber and fabric coating equipment provided in an embodiment of this utility model;

[0026] Figure 3 This is a partial cross-sectional view of the coating roller provided in an embodiment of this utility model;

[0027] Figure 4 This is a top view of the fiber and fabric coating equipment provided in an embodiment of this utility model;

[0028] Figure 5 yes Figure 1 Enlarged view of point A in the image;

[0029] Figure 6 yes Figure 1 Enlarged view of point B in the image;

[0030] Figure 7 This is a system flow diagram of the fiber and fabric coating equipment provided in an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. First chamber; 11. Heating assembly; 110. Heating tube;

[0033] 20. Coating roller; 21. Receiving cavity; 22. Rotary joint; 23. Drive component;

[0034] 30. Heating mechanism;

[0035] 40. Second box;

[0036] 50. First liquid level sensor; 51. Second liquid level sensor; 52. Temperature sensor;

[0037] 60. Base; 61. Pressure rod; 62. Support rod; 63. Adjusting nut;

[0038] 70. Controller; 71. Solenoid valve; 72. Alarm; 73. Display screen. Detailed Implementation

[0039] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] A coating device is used to uniformly apply a coating medium to fibers or fabrics. The surface of the fiber or fabric to be coated faces the coating component of the coating device. The fiber or fabric moves along a conveying path, and the coating component rotates to pick up the coating medium, simultaneously coating the fiber or fabric evenly. The coating medium is generally an oil-based or water-based coating. Therefore, temperature fluctuations in the medium can cause significant viscosity fluctuations. Existing coating devices heat the coating medium in an external medium tank before conveying it to the main medium tank. Temperature fluctuations occur during this conveying process. The coating medium picked up by the coating component in the main medium tank is relatively thin, and to ensure uniform coating, the coating component generally rotates slowly. This further causes temperature fluctuations, resulting in significant viscosity fluctuations in the coating medium, especially when the ambient temperature is low.

[0041] Therefore, see Figure 1-2 As shown, this embodiment provides a fiber and fabric coating device, including a first housing 10, a heating assembly 11, a coating assembly, and a heating mechanism 30, wherein:

[0042] The first housing 10 has an open top and contains a coating medium. Heating components 11 are uniformly arranged within the first housing 10 to heat the coating medium. The coating component includes a coating roller 20 and a drive unit 23. The coating roller 20 is mounted on the first housing 10 and can rotate around its axis, picking up the coating medium during rotation. A heat equalization section is provided inside the coating roller 20. The drive unit 23 drives the coating roller 20 to rotate, and the heating mechanism 30 provides heat to the heating component 11 and the heat equalization section. In this embodiment, the drive unit 23 can be a servo motor. A servo motor driving the coating roller 20 to rotate is a conventional design in the art and will not be elaborated upon here. The heat equalization section ensures a uniform surface temperature of the roller. The heating mechanism 30 effectively reduces temperature fluctuations by heating the coating medium and the heat equalization section, avoiding problems such as coating medium solidification and viscosity abrupt changes on the roller surface during coating. This allows for the formation of a stable coating on the fiber or fabric surface.

[0043] See Figure 3As shown, in one feasible embodiment, the coating roller 20 has a receiving cavity 21 inside, and the heat equalization section includes a heat-conducting medium disposed in the receiving cavity 21. The heating mechanism 30 heats the heat-conducting medium. The conventional coating roller 20 is only used for rotating and dipping the coating medium. Since the coating roller 20 rotates at a relatively slow speed and the coating medium is relatively thin, it is also a factor that causes large temperature fluctuations in the coating medium during the coating process. In this embodiment, the coating roller 20 is made into a hollow structure, and the receiving cavity 21 is filled with a heat-conducting medium to heat the heat-conducting medium in order to achieve temperature uniformity of the coating roller 20 in the axial and radial directions.

[0044] In this embodiment, the heat transfer medium can be liquid or gas, preferably liquid, such as water or oil. Therefore, the heating mechanism 30 is preferably a water-type mold temperature controller, connected by pipes. Water-type mold temperature controllers are existing technology, relying on a circulating pump to provide power and circulate water within the system. The pump in the power transmission system drives the hot fluid from the water tank equipped with a built-in heater and cooler, flowing to the mold or equipment requiring temperature control, and then flowing back from the mold to the water tank, thus repeating the cycle to achieve heat transfer and temperature regulation. Of course, other heating mechanisms 30 can also be used, and are not limited here. In another embodiment, the heat spreader can also be electrically heated according to the required temperature or heating rate. Specifically, it can use heating wires, heating tubes 110, or electromagnetic induction heating. The heating wires are evenly distributed on the inner wall of the coating roller 20, which will not be elaborated here.

[0045] The coating roller 20 is a component that rotates around its own axis, while the water-type mold temperature controller is a stationary device. If the rotating coating roller 20 is directly connected to a pipe, it will cause the pipe to become entangled, twisted, or even broken, making it impossible to achieve continuous circulation of the heat transfer medium. Therefore, in this embodiment, the coating roller 20 is connected to two rotary joints 22 at both ends along the axial direction. The rotary joints 22 are used to connect the receiving cavity 21 and the heating mechanism 30. The rotary joints 22 isolate the rotating coating roller 20 from the fixed pipe through a sealing structure, such as bearings and seals. This allows the roller to rotate synchronously with the coating roller 20 while maintaining a sealed connection with the fixed pipe, ensuring continuous flow of the heat transfer medium in the circulation path.

[0046] See Figure 3As shown, in this embodiment, the heating assembly 11 includes a plurality of heating tubes 110 spaced apart within the first housing 10. The heating tubes 110 are interconnected, and each heating tube 110 contains a heat-conducting medium. The plurality of heating tubes 110 are evenly distributed on the bottom and side walls of the housing, distributing heat to different areas of the housing, increasing the heating area of ​​the coating medium, reducing heating dead zones, and preventing temperature stratification. The heat-conducting medium in the heating tubes 110 is the same as the heat-conducting medium in the coating roller 20, and the heat-conducting medium is circulated and heated by a water-type mold temperature controller. Alternatively, in another embodiment, the heating assembly 11 can also be electrically heated, for example, by using an electric heating coil.

[0047] See Figure 1-2 and Figure 4-5 As shown, when the coating medium in the first tank 10 decreases, it needs to be replenished promptly. However, directly adding the coating medium can cause significant temperature fluctuations. In existing technologies, the medium is supplied through an external tank. When the liquid level in the main tank drops, the machine needs to be stopped for replenishment, and the liquid needs to be supplied sequentially until the preset temperature is reached before coating operations can be performed, which is time-consuming and labor-intensive. In this embodiment, the coating equipment also includes a second tank 40 connected to the first tank 10. The second tank 40 is positioned higher than the first tank 10. Heating components 11 connected to the heating mechanism 30 are evenly arranged inside the second tank 40, and an opening and closing device is provided between the first tank 10 and the second tank 40. The coating medium is pre-stored in the second tank 40, and since the second tank 40 is higher than the first tank 10, when the medium in the first tank 10 decreases, gravity replenishment is used instead of the existing pump replenishment method. The coating medium in the second tank 40 can flow naturally into the first tank 10 when the opening and closing device is opened, without the need for additional power. This simplifies the structure and avoids the medium shear deformation that may be caused by the pump. The heating component 11 inside the second chamber 40 uses multiple heating tubes 110, the same as those inside the first chamber 10. It can independently heat the pre-stored coating medium, making its temperature as close as possible to the temperature of the coating medium inside the first chamber 10. This allows the coating medium to be replenished and preheated in the second chamber 40 at any time, and also ensures that the temperature fluctuation of the medium flowing to the first chamber 10 is minimal, without the need for machine shutdown, saving time and effort.

[0048] The first chamber 10, the second chamber 40, and the coating roller 20 can employ different heating methods or heating mechanisms. As a preferred method, the first chamber 10, the second chamber 40, and the coating roller 20 are all heated by a water-type mold temperature controller. The input and output ends of the pipes of the three are connected to the water-type mold temperature controller through multi-way connectors. It should be noted that in this application, the roller surface temperature of the coating roller 20 is not required to be exactly the same as the temperature of the coating medium. The purpose of heating the coating roller 20 is to reduce temperature fluctuations.

[0049] See Figure 7As shown, in order to achieve precise control of the coating medium state, a first liquid level sensor 50, a second liquid level sensor 51, and a temperature sensor 52 are respectively installed in the first box 10 and the second box 40. The first liquid level sensor 50 is used to detect the high liquid level of the coating medium, the second liquid level sensor 51 is used to detect the low liquid level of the coating medium, and the temperature sensor 52 is used to detect the temperature of the coating medium. The control system also includes a controller 70, an alarm 72, and a display screen 73. The outputs of the first liquid level sensor 50, the second liquid level sensor 51, and the temperature sensor 52 in the first housing 10 and the second housing 40 are all connected to the input of the controller 70. The inputs of the alarm 72 and the display screen 73 are connected to the output of the controller 70. When the liquid level of the medium in the first housing 10 or the second housing 40 reaches the preset high limit or the preset low limit, an alarm can be triggered to remind the operator to handle the situation in time. Setting the preset high limit can ensure that the liquid level in the housing has reached the optimal level and prevent the medium from overflowing. Setting the preset low limit can prevent the coating roller 20 from being insufficient to pick up the coating medium or the second housing 40 from being insufficient to replenish the liquid in time when the liquid level is too low. The temperature sensor 52 detects the temperature of the coating medium in the first housing 10 and the second housing 40 in real time and displays it on the display screen 73. When the temperature exceeds or falls below the preset range, an alarm is triggered to remind the operator to adjust the temperature in time to ensure that the coating medium is always in the optimal coating state.

[0050] Further, see Figure 7 As shown, the opening and closing mechanism includes a solenoid valve 71, the input of which is electrically connected to the output of the controller 70. When the liquid level of the medium in the first tank 10 is lower than the preset lower limit, the controller 70 opens the solenoid valve 71, and the coating medium in the second tank 40 automatically replenishes the first tank 10 under the action of gravity. When the liquid level of the medium in the first tank 10 reaches or exceeds the preset upper limit, the solenoid valve 71 automatically closes to ensure production continuity.

[0051] See Figure 5-6 As shown, in this embodiment, both the first housing 10 and the second housing 40 are double-layered structures, and an insulation filling layer is provided inside the double-layered structure. The insulation filling layer can be made of insulation sponge. The double-layered structure forms an air isolation layer, which, together with the insulation sponge, can significantly reduce the heat loss of the coating medium inside the housing and maintain temperature stability.

[0052] See Figure 6As shown, the transport path of fibers or fabrics is usually fixed. Therefore, it is difficult to control the amount of coating medium picked up when the fibers or fabrics pass over the surface of the coating roller 20. In this embodiment, pressure rods 61 are provided on both sides of the first housing 10, and both pressure rods 61 can move up and down relative to the coating roller 20. The fibers or fabrics pass through the pressure rods 61 and the coating roller 20 in sequence. By adjusting the height of the pressure rods 61 in coordination with the coating roller 20, the contact area between the fibers or fabrics and the coating roller 20 can be controlled, thereby controlling the amount of coating medium picked up and ensuring the stability of the coating process.

[0053] See Figure 1 and Figure 6 As shown, in this embodiment, the coating equipment also includes a base 60, which supports the first housing 10, the second housing 40, and the coating assembly. To adjust the height of the pressure rod 61, support rods 62 are provided on both sides of the base 60. The pressure rod 61 passes through the support rods 62, and adjusting nuts 63 are provided on the upper and lower sides of the support rods 62. The support rods 62 are threaded, allowing the pressure rod 61 to move on them. The upper and lower adjusting nuts 63 engage with the threads of the support rods 62 to limit the pressure rod 61 to the adjusted height position.

[0054] Based on the above embodiments, the working principle of the fiber and fabric coating equipment provided by this utility model is as follows:

[0055] The water-type mold temperature controller circulates and heats the heat-conducting medium in the first chamber 10, the second chamber 40, and the coating roller 20. When the medium level in the first chamber 10 is lower than the preset low limit, the solenoid valve 71 opens, and the pre-stored coating medium in the second chamber 40 flows to the first chamber 10. When the medium level in the first chamber 10 is higher than the preset high limit, the solenoid valve 71 closes. When the pre-stored coating medium in the second chamber 40 is lower than the preset low limit or higher than the preset high limit, an alarm is issued to remind the operator to replenish the liquid in time or stop replenishing the liquid.

[0056] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0057] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A fiber and fabric coating device, characterized in that, include: The first box has an open top and contains a coating medium inside; Heating components are evenly distributed within the first chamber and are used to heat the coating medium. The coating assembly includes a coating roller and a drive unit. The coating roller is disposed on the first housing and can rotate around its axis. During rotation, the coating roller picks up the coating medium. The coating roller is provided with a heat equalization section. The drive unit is used to drive the coating roller to rotate. A heating mechanism is used to provide heat to the heating assembly and the heat spreader.

2. The fiber and fabric coating equipment according to claim 1, characterized in that, The coating roller has a cavity inside, the heat equalization section includes a heat-conducting medium disposed in the cavity, and the heating mechanism heats the heat-conducting medium.

3. The fiber and fabric coating equipment according to claim 2, characterized in that, The coating roller is connected to a rotary joint at both ends along the axial direction. The rotary joint is used to connect the receiving cavity with the heating mechanism.

4. The fiber and fabric coating equipment according to claim 1, characterized in that, The heating assembly includes a plurality of heating tubes spaced apart within the first housing, the plurality of heating tubes being interconnected, and the heating tubes containing a heat-conducting medium.

5. The fiber and fabric coating equipment according to claim 1, characterized in that, The coating equipment also includes a second box that communicates with the first box. The second box is positioned higher than the first box. Heating components connected to the heating mechanism are uniformly arranged inside the second box, and an opening and closing component is provided between the first box and the second box.

6. The fiber and fabric coating equipment according to claim 5, characterized in that, The first chamber and the second chamber are respectively equipped with a first liquid level sensor, a second liquid level sensor and a temperature sensor. The first liquid level sensor is used to detect the high liquid level of the coating medium, the second liquid level sensor is used to detect the low liquid level of the coating medium, and the temperature sensor is used to detect the temperature of the coating medium.

7. The fiber and fabric coating equipment according to claim 6, characterized in that, The opening and closing element includes a solenoid valve, the input end of which is electrically connected to the output ends of the first liquid level sensor and the second liquid level sensor.

8. The fiber and fabric coating equipment according to claim 5, characterized in that, Both the first and second boxes are double-layered structures, and the double-layered structures are equipped with a thermal insulation filling layer.

9. The fiber and fabric coating equipment according to claim 1, characterized in that, The first box body is provided with pressure rods on both sides, and both pressure rods can move up and down relative to the coating roller.

10. The fiber and fabric coating equipment according to claim 5, characterized in that, The coating equipment also includes a base for supporting the first housing, the second housing, and the coating components. Support rods are provided on both sides of the base, and the pressure rod passes through the support rods. Adjusting nuts are provided on the upper and lower sides of the support rods respectively.

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