A surface treatment device for the adhesive layer of a rubber composite board

Abstract

This utility model belongs to the technical field of rubber composite board, specifically relating to a surface treatment device for the adhesive layer of rubber composite boards. The device includes a cleaning unit, a drying unit, and a corona treatment unit through which the vulcanized rubber-metal composite board passes sequentially. The cleaning unit includes a first sprayer using ethyl acetate solution as the cleaning medium and a second sprayer using ethanol or methanol as the cleaning medium. The drying unit includes a first purging duct and a second purging duct, located after the first and second sprayers, respectively. The corona treatment unit is a corona treatment machine. This surface treatment device cleans the adhesive layer surface after vulcanization and before coding, making it particularly suitable for continuous production lines of rubber composite boards. It features thorough adhesive layer cleaning and strong adhesion of the coding paint.

Description

Technical Field

[0001] This utility model belongs to the technical field of rubber composite board, specifically relating to a surface treatment device for the adhesive layer of a rubber composite board. Background Technology

[0002] Rubber (metal) composite plates are the core material of automotive brake damping pads, reducing braking noise by damping vibrations and sound wave transmission. Their typical structure is a sandwich of "rubber functional layer - metal substrate - rubber functional layer," with a thickness typically ranging from 0.4 to 0.8 mm. They are installed on the back of the brake pad to block the transmission of frictional vibrations.

[0003] Currently, metal substrates typically have rubber layers on both the top and bottom surfaces. After overall vulcanization, coding, patterns, or functional coatings need to be applied to the rubber layer surface. However, rubber-metal composite boards require multiple processes during the initial processing, including board cleaning, calendering, and vulcanization. Before coding, some grease and dirt remain on the rubber layer surface, and simple blowing and rinsing are insufficient to clean the rubber layer, significantly reducing the adhesion of subsequent coding and functional coatings. Utility Model Content

[0004] The purpose of this invention is to provide a device for cleaning the surface of the rubber layer of a rubber composite board after vulcanization and before coding, which is especially suitable for continuous production lines of rubber composite boards and features thorough cleaning of the rubber layer and strong adhesion of the coding paint.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A surface treatment device for the adhesive layer of a rubber composite board is characterized in that it includes a cleaning unit, a drying unit, and a corona treatment unit through which the vulcanized rubber-metal composite board passes in sequence. The cleaning unit includes a first sprayer using ethyl acetate solution as the cleaning medium and a second sprayer using ethanol or methanol as the cleaning medium. The drying unit includes a first purging duct and a second purging duct, which are located after the first and second sprayers, respectively. The corona treatment unit is a corona treatment machine.

[0007] The additional technical features of the adhesive layer surface treatment device constituting the above-mentioned rubber composite board also include:

[0008] —The cleaning medium of the first sprayer is an ethyl acetate solution with a concentration of 30%-80%, and the cleaning medium of the second sprayer is anhydrous ethanol;

[0009] — Both the first and second sprayers include a frame, and a first channel for the rubber-metal composite plate to pass through is provided inside the frame. Several spray pipes are arranged above and / or below the first channel. Multiple nozzles corresponding to the rubber composite plate are provided on the spray pipes. The spray pipes are connected to a cleaning medium container through a connecting pipe. A power pump mechanism is provided on the connecting pipe.

[0010] — Both the first and second purge ducts include a frame. A second channel for the rubber-metal composite plate to pass through is provided inside the frame. Several hot air purge ducts are arranged above and / or below the second channel. Multiple nozzles corresponding to the rubber composite plate are provided on the hot air purge ducts. The hot air purge ducts are connected to a blower through ducts. A heating mechanism is provided on the ducts.

[0011] —A first squeezing mechanism and a second squeezing mechanism are respectively installed after the first sprayer and the second sprayer. The two are located before the first purge air pipe and the second purge air pipe, respectively. The first squeezing mechanism and the second squeezing mechanism both include a frame and a pair of rollers installed in the frame. The rubber-metal composite plate passes through the gap between the pair of rollers.

[0012] —In the first squeezing mechanism and the second squeezing mechanism, one is a motor-driven power roller and the other is a pressure roller. The bearing seats at both ends of the pressure roller are located in the guide rail of the frame. The bearing seats are connected to the power cylinder or to the adjusting screw through the bearing. The adjusting screw is rotatably connected to the positioning nut in the frame.

[0013] The corona treatment machine includes a main unit, which includes a first electrode unit and a second motor unit, which correspond to the lower and upper surfaces of the rubber-metal plate, respectively. The first electrode unit and the second motor unit correspond to the first roller and the second roller, respectively, which correspond to the upper and lower surfaces of the rubber-metal plate, respectively.

[0014] Compared with the prior art, the adhesive surface treatment device for rubber composite boards provided by this utility model has the following advantages: The device, through a sequentially connected cleaning unit, drying unit, and corona treatment unit, cleans and corona treats the adhesive surface of the rubber-metal composite board after vulcanization, ensuring strong adhesion of the printed markings and avoiding problems such as poor coating adhesion and peeling in later stages. Secondly, the cleaning unit includes a first sprayer using ethyl acetate solution as the cleaning medium and a second sprayer using ethanol or methanol as the cleaning medium, i.e., a dual-rinse mode is used to thoroughly clean the adhesive surface of the composite board. Ethyl acetate solution is highly effective at removing grease and stains, and can dissolve the rubber surface to a certain extent, creating micro-textures and increasing the contact area with the inkjet coating. Ethanol or methanol solvents, due to their excellent volatility and solubility, can dissolve substances remaining from the pre-washing stage, thoroughly cleaning the rubber surface. Finally, after air drying and corona treatment, the surface activity of the rubber is improved, enhancing the adhesion to the coating. This device has the advantages of thorough rubber cleaning and strong adhesion of inkjet paint, and achieves rubber surface cleaning through a continuous process, making it particularly suitable for the production line of rubber-metal composite panels. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the adhesive layer surface treatment device for a rubber composite board according to the present invention. Detailed Implementation

[0016] The structure and working principle of the adhesive layer surface treatment device for rubber composite boards provided by this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] In the description of this utility model, unless otherwise stated, the terms "upper / lower", "front / rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "set / equipped" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] like Figure 1 As shown, the surface treatment device for the rubber composite board includes a cleaning unit, a drying unit, and a corona treatment unit through which the vulcanized rubber-metal composite board a (taking SBR-steel composite board with a surface adhesive layer of 0.5mm) passes in sequence. The cleaning unit includes a first sprayer 11 using ethyl acetate solution as the cleaning medium and a second sprayer 12 using ethanol or methanol as the cleaning medium. The drying unit includes a first purging duct 21 and a second purging duct 22, which are located after the first sprayer 11 and the second sprayer 12, respectively. The corona treatment unit is a corona treatment machine 3.

[0020] Its working principle is as follows: After the rubber-metal composite plate is vulcanized and formed as a whole, before the rubber layer surface is marked or coated, the composite plate a enters the first sprayer 11, the first blowing air duct 21, the second sprayer 12, the second blowing air duct 22 and the corona treatment machine 3 in sequence, realizing the process of cleaning, drying and corona impact treatment of the rubber layer surface.

[0021] It should be noted that the cleaning medium of the first sprayer 11 is ethyl acetate solution, which can effectively remove grease and stains, and can dissolve the rubber surface to a certain extent, creating tiny textures and increasing the contact area with the inkjet coating; the cleaning medium of the second sprayer 12 is ethanol or methanol, which can effectively dissolve and evaporate the residual substances from the pre-washing stage, making the rubber surface thoroughly clean.

[0022] In the structure of the adhesive layer surface treatment device constituting the above-mentioned rubber composite board

[0023] —As a preferred embodiment, the cleaning medium of the first sprayer 11 is an 80% ethyl acetate solution (obtained by dilution with anhydrous ethanol), and the cleaning medium of the second sprayer 12 is anhydrous ethanol. The combination of the two has the best cleaning effect on the adhesive surface of the rubber-metal composite board, and is also beneficial to the subsequent corona impact treatment.

[0024] Specifically, both the first sprayer 11 and the second sprayer 12 mentioned above include a frame 10. A first channel 13 is provided inside the frame 10 for the rubber-metal composite plate a to pass through. Several spray pipes 14 are arranged above and / or below the first channel 13. Multiple nozzles 15 corresponding to the rubber composite plate are provided on the spray pipes 14. The spray pipes 14 are connected to the cleaning medium container 17 through a connecting pipe 16. A power pump 18 mechanism is provided on the connecting pipe 16. This structure is simple and compact. The multiple nozzles form a spray surface that can quickly and evenly spray the upper and lower adhesive layers of the composite plate.

[0025] —Furthermore, both the first purge duct 21 and the second purge duct 22 mentioned above include a frame 20. A second channel 23 is provided inside the frame 20 for the rubber-metal composite plate a to pass through. Several hot air purge ducts 24 are arranged above and / or below the second channel 23. Multiple nozzles 25 corresponding to the rubber composite plate are provided on the hot air purge ducts 24. The hot air purge ducts 24 are connected to a blower 26 through the duct. A heating mechanism 27 is provided on the duct. The nozzles of this structure form linear air knives, and the hot air can quickly dry the cleaning medium on the surface of the rubber layer.

[0026] The temperature of the hot air blowing is between 35-80℃, preferably set within the range of 50±5℃. The air knife nozzle is 50mm away from the surface of the adhesive layer, and the air velocity is 2m / s to prevent heat accumulation.

[0027] — Preferably, a first squeezing mechanism 41 and a second squeezing mechanism 42 are respectively provided after the first sprayer 11 and the second sprayer 12. They are located before the first blowing air pipe 21 and the second blowing air pipe 22, respectively. Both the first squeezing mechanism 41 and the second squeezing mechanism 42 include a frame 40 and rollers arranged in the frame 40. The rubber-metal composite plate a passes through the gap between the rollers. That is, the squeezing by the rollers can significantly reduce the cleaning medium remaining on the surface of the rubber layer, thereby improving the drying efficiency for subsequent hot air blowing.

[0028] —Furthermore, in the first extrusion mechanism 41 and the second extrusion mechanism 42 mentioned above, one is a power roller 44 driven by a motor 43, and the other is a pressure roller 45. The bearing seats at both ends of the pressure roller 45 are located in the guide rail 46 of the frame 40. The bearing seats are connected to the power cylinder, that is, the power cylinder drives the pressure roller 45 to move relative to the power roller, and the gap between the two is adjusted to accommodate composite boards of different thicknesses. Of course, the adjusting screw 47 can also be connected to the bearing. The adjusting screw 47 is rotatably connected to the positioning nut 48 in the frame 40, that is, the pressure roller 45 can also be moved by manually rotating the adjusting screw 47.

[0029] —Preferredly, this embodiment has made adaptive improvements to the traditional corona treatment machine 3, which includes a main unit 30. The main unit 30 includes a first electrode unit 31 and a second electrode unit 32, which correspond to the lower surface and upper surface of the rubber-metal plate, respectively. The first electrode unit 31 and the second electrode unit 32 correspond to the first roller 33 and the second roller 34, respectively. The first roller 33 and the second roller 34 correspond to the upper surface and lower surface of the rubber-metal plate, respectively. That is, the composite plate passes between the first electrode unit 31 and the first roller 33 to achieve corona impact treatment on the lower surface adhesive layer, and the composite plate passes between the second electrode unit 32 and the second roller 34 to achieve corona impact treatment on the upper surface adhesive layer.

[0030] Preferably, the electrode tube of the above-mentioned corona treatment machine 3 is a ceramic electrode tube, the voltage is in the range of 8-20KV, and 15KV is selected in this embodiment, the frequency is in the range of 20kHz, the power density is in the range of 55±5 W·min / m², the electrode gap is in the range of 1.5±0.1mm, and the processing speed is in the range of 10±2m / min.

[0031] During the corona treatment, infrared temperature monitoring is used to ensure that the surface temperature of the rubber is ≤60℃ to prevent the deterioration of the rubber vulcanization layer. After treatment, its dyne value is not less than 42.

[0032] The above-described embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit the implementation of this utility model. Therefore, any other modifications or equivalent substitutions to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A device for surface treatment of the adhesive layer of a rubber composite board, characterized in that: The system includes a cleaning unit, a drying unit, and a corona treatment unit through which the vulcanized rubber-metal composite sheet passes in sequence. The cleaning unit includes a first sprayer using ethyl acetate solution as the cleaning medium and a second sprayer using ethanol or methanol as the cleaning medium. The drying unit includes a first purge duct and a second purge duct, which are located after the first sprayer and the second sprayer, respectively. The corona treatment unit is a corona treatment machine.

2. The adhesive layer surface treatment device for a rubber composite board according to claim 1, characterized in that: The cleaning medium of the first sprayer is an ethyl acetate solution with a concentration of 30%-80%, and the cleaning medium of the second sprayer is anhydrous ethanol.

3. The adhesive layer surface treatment device for a rubber composite board according to claim 1 or 2, characterized in that: Both the first and second sprayers include a frame, and a first channel for the rubber-metal composite plate to pass through is provided inside the frame. Several spray pipes are arranged above and / or below the first channel. Multiple nozzles corresponding to the rubber composite plate are provided on the spray pipes. The spray pipes are connected to a cleaning medium container through a connecting pipe. A power pump mechanism is provided on the connecting pipe.

4. The adhesive layer surface treatment device for a rubber composite board according to claim 1 or 2, characterized in that: Both the first and second purging ducts include a frame. A second channel for the rubber-metal composite plate to pass through is provided inside the frame. Several hot air purging ducts are arranged above and / or below the second channel. Multiple nozzles corresponding to the rubber composite plate are provided on the hot air purging ducts. The hot air purging ducts are connected to a blower through ducts. A heating mechanism is provided on the ducts.

5. The adhesive layer surface treatment device for a rubber composite board according to claim 1 or 2, characterized in that: A first squeezing mechanism and a second squeezing mechanism are respectively installed after the first sprayer and the second sprayer. The two are located before the first purge air pipe and the second purge air pipe, respectively. The first squeezing mechanism and the second squeezing mechanism both include a frame and a pair of rollers installed in the frame. The rubber-metal composite plate passes through the gap between the rollers.

6. The surface treatment device for the adhesive layer of a rubber composite board according to claim 5, characterized in that: In the first and second squeezing mechanisms, one of the rollers is a motor-driven power roller, and the other is a pressure roller. The bearing seats at both ends of the pressure roller are located in the guide rail of the frame. The bearing seats are connected to the power cylinder or to the adjusting screw through the bearing. The adjusting screw is rotatably connected to the positioning nut in the frame.

7. The adhesive layer surface treatment device for a rubber composite board according to claim 1 or 2, characterized in that: The corona treatment machine includes a main unit, which includes a first electrode unit and a second motor unit, which correspond to the lower and upper surfaces of the rubber-metal plate, respectively. The first electrode unit and the second motor unit correspond to the first roller and the second roller, respectively, which correspond to the upper and lower surfaces of the rubber-metal plate, respectively.

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