Gluing machine

Abstract

The utility model discloses a gluing machine which is characterized in that a first cold air device is arranged in a cooling area of an ascending drying oven and is used for providing cold air to cool prepregs; meanwhile, a first air blowing device is arranged at the bottom of the cooling area of the ascending drying oven and used for providing first airflow staggered with the moving direction of the prepreg for the prepreg, and a first flow guiding device is arranged at the top of the heating area of the ascending drying oven and used for forming downward return air. Therefore, hot air flowing upwards along the prepreg is turned downwards under the action of the first flow guide device, and meanwhile, the hot air is pressed by utilizing part of kinetic energy of the hot air, so that the problem that the hot air flows upwards is effectively solved; the impact air curtain of the first air flow destroys the hot air flow trend on the surface of the prepreg, so that the hot air wall approaching effect is reduced, cold air downward flowing and hot air upward flowing are reduced, the cooling effect and the cooling temperature uniformity of the prepreg are effectively improved, and the stability of the prepreg in the production process is improved.

Description

Technical Field

[0001] This utility model relates to the field of prepreg production technology, and in particular to a gluing machine that can enhance the cooling effect and temperature uniformity during the prepreg process. Background Technology

[0002] The hot kerosene infrared drying vertical coating machine processes prepreg in the following way: the prepreg sequentially passes through an upward oven, a top roller chamber, and a downward oven. Inside the ovens, heat-conducting oil heats the radiant plates to generate infrared radiation, drying and partially curing the resin. Fresh hot air then carries the organic solvent into an incinerator (RTO) for incineration to meet environmental requirements. After passing through the upward oven, the prepreg must be redirected by the top roller before entering the downward oven. However, the resin in the prepreg is sticky after being heated in the oven, so pre-cooling is necessary before passing through the top roller to prevent sticking.

[0003] Existing top cooling structures for gluing machines typically use a centrifugal fan to cool natural air through a finned heat exchanger before delivering it to air nozzles. The cooled air is then blown in through the nozzles to cool the prepreg. In this structure, hot air is located below and cold air is located above. Because the density of hot air is lower than that of cold air, there is a tendency for hot air to rise and cold air to fall at the interface between the hot and cold air. This leads to two systemic problems in the top cooling structure of the gluing machine:

[0004] 1. If the junction between hot and cold air is unobstructed or has a large opening, hot air is prone to rising and cold air to fall. If hot air rises into the cooling area, the cooling effect of the prepreg will be poor, which can easily lead to defects such as sticking to the rollers and folding. If cold air falls into the heating area, it can easily cause uneven temperature in the heating area, resulting in the prepreg failing to meet the standards. In addition, if hot air rises and cannot be suppressed, it can also cause production problems such as volatile matter dripping from the cooling area and the top roller chamber of the oven.

[0005] Second, the cold air enters the cooling zone of the gluing machine oven from one side, resulting in inconsistent airflow between the inlet and the far inlet. In severe cases, the top roller chamber can clearly feel that one side has a larger volume of cold air while the other side has no airflow, which leads to uneven heating and cooling of the semi-cured sheet and causes the top roller to fold.

[0006] Therefore, it is necessary to provide a gluing machine that can reduce the movement of hot and cold air, enhance the cooling effect and temperature uniformity during the semi-curing process, in order to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide a gluing machine that can reduce the movement of hot and cold air, enhance the cooling effect and temperature uniformity during the semi-curing process.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows: A gluing machine is provided, comprising an isolated upper oven, a lower oven, and a top roller chamber connected to both. Both the upper and lower ovens include a connected heating zone and a cooling zone. The gluing machine further includes a first flow guiding device, a first air blowing device, and a first cold air device. The first flow guiding device is located at the top of the heating zone of the upper oven to form downward return air. The first air blowing device is located at the bottom of the cooling zone of the upper oven to provide a first airflow intersecting with the direction of movement of the prepreg. The first cold air device is located above the first air blowing device to provide cold air to cool the prepreg.

[0009] Preferably, the gluing machine further includes a second flow guiding device and a second air blowing device. The second flow guiding device is located at the top of the heating zone of the downward oven to form downward return air. The second air blowing device is located at the top and / or bottom of the cooling zone of the downward oven to provide a second airflow that is intersecting with the direction of movement of the prepreg. Thus, on the one hand, the second flow guiding device blocks the hot air rising from the heating zone, causing the hot air to turn downward. On the other hand, the second air blowing device blows the second airflow to both sides of the prepreg. The impact curtain of the second airflow disrupts the tendency of the hot airflow rising along the surface of the prepreg, thereby reducing the hot air wall effect. The guiding effect of the second airflow mixes the hot and cold air, reduces the temperature difference, and prevents the hot air from rising and entering the top roller chamber, thereby preventing the prepreg from folding on the top roller.

[0010] Preferably, both the first and second airflow guiding devices include a through-hole and two baffles on either side of the through-hole. Each baffle is arc-shaped, and the concave surface of each baffle faces the heating zone. In this way, when hot air rises, it is blocked by the baffles. The concave surface of the baffles guides the hot air downwards, creating a downward return airflow. This utilizes some of the kinetic energy of the hot air to suppress it, thereby improving the problem of hot air rising and effectively improving the cooling effect and uniformity of the prepreg.

[0011] Preferably, both the first and second flow guiding devices include a housing, with the channel opening penetrating the top and bottom of the housing. Two baffles are respectively installed inside the housing, and the two baffles are symmetrically arranged along the centerline of the channel opening. The baffles on both sides of the channel opening effectively block hot air from rising, thereby improving the cooling effect of the prepreg and enhancing the cooling uniformity of the prepreg.

[0012] Preferably, the length of the housing is 1860mm, the width is 200mm, and the height is 100mm; the length of the channel opening is 1460mm and the width is 100mm. The channel opening is designed to allow the prepreg to pass through and only allows for swaying and lateral deviation of the prepreg, thereby reducing the opening at the junction of hot and cold air.

[0013] Preferably, the first air blowing device includes two symmetrically arranged first air knives, forming a first channel between the two first air knives for the semi-cured sheet to pass through, and the two first air knives form opposing first airflows, the pressure of which is greater than the pressure of the cold air provided by the first cold air device. The two opposing first airflows blow towards both sides of the semi-cured sheet, and the impact of the first airflow disrupts the hot airflow trend on the surface of the semi-cured sheet, thereby reducing the hot air wall effect and effectively mitigating the problems of airflow sinking and rising, especially preventing the cold air in the cooling zone from sinking; at the same time, the two first air knives are installed at the junction of hot and cold air, and the hot and cold air are mixed by means of the guiding effect of the first airflow, reducing the temperature difference.

[0014] Preferably, each of the first air knives is supplied with compressed air at a pressure of 2-6 kg, and the thickness of the first airflow formed by each of the first air knives is less than or equal to 0.05 mm. This causes the first airflow to be blown out at high speed to form an airflow sheet. The airflow sheet can draw in 30-40 times the amount of ambient air, thereby forming a thin, high-intensity, high-airflow impact air curtain. This disrupts the hot airflow trend on the surface of the semi-cured sheet, effectively prevents the cold air in the cooling zone from flowing downwards, and mixes the hot and cold air to reduce the temperature difference.

[0015] Preferably, the second blowing device is located at the top of the cooling zone of the downward oven, and is used to provide a second airflow that is intersecting with the direction of movement of the prepreg, so as to prevent the hot air that is rising along the surface of the prepreg from continuing to rise and enter the top roller chamber.

[0016] Preferably, the second air blowing device includes two symmetrically arranged second air knives, forming a second channel between the two second air knives for the semi-cured sheet to pass through, and the two second air knives form opposing second airflows. The opposing two second airflows blow towards both sides of the semi-cured sheet. The impact air curtain of the second airflow disrupts the tendency of the hot airflow to rise along the surface of the semi-cured sheet, thereby reducing the hot air wall effect and preventing the hot air rising along the surface of the semi-cured sheet from entering the top roller chamber, effectively preventing the semi-cured sheet from folding under the top roller.

[0017] Preferably, each of the second air knives is supplied with compressed air at a pressure of 2-6 kg, and the thickness of the second airflow formed by each of the second air knives is less than or equal to 0.05 mm. This causes the second airflow to be blown out at high speed to form an airflow sheet. The airflow sheet can draw in 30-40 times the amount of ambient air, thereby forming a thin, high-intensity, high-airflow impact airflow curtain, which disrupts the hot airflow trend on the surface of the prepreg and prevents the hot air that runs along the surface of the prepreg from entering the top roller chamber.

[0018] Preferably, the first cooling air device includes multiple pairs of first cooling air nozzles arranged at intervals in sequence, with a first channel formed between each pair of first cooling air nozzles for the semi-cured sheet to pass through, and the pressure of each first cooling air nozzle is less than the pressure of the first airflow generated by the first blowing device. The cooling air blown out by each pair of first cooling air nozzles cools the semi-cured sheet passing through the first channel.

[0019] Preferably, the gluing machine further includes a second cold air device located in the cooling zone of the downward oven for providing cold air to cool the semi-cured sheet, and the temperature of the cold air provided by the second cold air device is higher than the temperature of the cold air provided by the first cold air device.

[0020] Preferably, the second cooling air device includes multiple pairs of second cooling air nozzles arranged at intervals in sequence, with a second channel formed between each pair of second cooling air nozzles for the semi-cured sheet to pass through, and the pressure of the cooling air provided by each second cooling air nozzle is less than the pressure of the second airflow generated by the second blowing device. When the semi-cured sheet, which has turned downwards after passing through the top roller chamber, passes through the second channel, the cooling air provided by the second cooling air nozzles further cools the semi-cured sheet.

[0021] Preferably, the top roller chamber is located above and connected to the upper and lower ovens, respectively. Since the top roller chamber, upper oven, and lower oven are separately configured rather than as a single unit, and the upper and lower ovens are connected to the top roller chamber via smaller channels, this effectively prevents a situation where one side of the top roller chamber has a larger volume of cold air than the other, ensuring uniform heating and cooling of the prepreg and preventing the top roller from folding.

[0022] Compared with existing technologies, the gluing machine of this invention firstly sets up a first air guiding device at the top of the heating zone of the upward oven. The first air guiding device forms a downward return airflow, which causes the upward hot air to turn downward under the action of the first air guiding device. At the same time, some of the kinetic energy of the hot air is used to suppress the hot air, thereby improving the problem of hot air rising. Secondly, a first air blowing device is set up at the bottom of the cooling zone of the upward oven. The first air blowing device provides a first airflow that intersects with the direction of movement of the prepreg. The impact of the first airflow disrupts the trend of hot air flow on the surface of the prepreg, thereby reducing the hot air wall effect and reducing the downward flow of cold air. At the same time, the first airflow guides the hot and cold air to mix, reducing the temperature difference, thereby slowing down the sinking and rising of airflow, effectively improving the cooling effect of the prepreg, improving the uniformity of the cooling temperature of the prepreg, and thus improving the stability of the prepreg production process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a gluing machine according to an embodiment of the present invention.

[0024] Figure 2 yes Figure 1 A schematic diagram of the structure of the first flow guiding device.

[0025] Figure 3 yes Figure 2 A cross-sectional schematic diagram.

[0026] Figure 4 yes Figure 1 A schematic diagram of the structure of the first air knife in the middle.

[0027] Figure 5 This is a schematic diagram of the structure of a gluing machine according to another embodiment of the present invention.

[0028] Figure 6 This is a structural schematic diagram of a gluing machine according to another embodiment of this utility model. Detailed Implementation

[0029] Embodiments of the present invention will now be described with reference to the accompanying drawings, in which similar element reference numerals represent similar elements. It should be noted that the directional descriptions involved in the present invention, such as up, down, left, right, front, and back, indicating directions or positional relationships, are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the technical solutions of this application or / 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 application. The terms "first," "second," etc., described are only used to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0030] Combination Figure 1 , Figure 5-6 As shown, the gluing machine 100 provided by this utility model is a vertical gluing machine. The semi-cured sheet 200 after being impregnated with glue moves vertically upward through the oven, then enters the top roller chamber, is turned and moves vertically downward, and passes through the oven again. During the process of passing through the oven, it is heated and cooled, thereby realizing the semi-curing process.

[0031] Continue to combine Figure 1 , Figure 5-6 As shown, in this invention, the gluing machine 100 includes an isolated upper drying oven 110, a lower drying oven 120, and a top roller chamber 130 located above both. The top roller chamber 130 is connected to both the upper drying oven 110 and the lower drying oven 120. The prepreg 200 enters the top roller chamber 130 through the upper drying oven 110 for turning, and then exits through the lower drying oven 120 for subsequent processing. In this invention, since the upper drying oven 110, the lower drying oven 120, and the top roller chamber 130 are set separately instead of being a single box, and the upper drying oven 110 and the lower drying oven 120 are connected to the top roller chamber 130 through smaller channels, the problem of inconsistent cold air volume at the inlet and far inlet ends during the cooling process can be effectively solved. This avoids a situation where one side of the top roller chamber 130 has a larger cold air volume and the other side has no air volume, thus ensuring uniform heating and cooling of the prepreg 200 and preventing the top roller from folding.

[0032] More specifically, the upward oven 110 includes a connected heating zone 111 and a cooling zone 112, with the cooling zone 112 located above the heating zone 111. The boundary between the heating zone 111 and the cooling zone 112 forms a hot-cold interface 113. Correspondingly, the downward oven 120 also includes a connected heating zone 121 and a cooling zone 122, with the cooling zone 122 located above the heating zone 121. The boundary between the heating zone 121 and the cooling zone 122 forms a hot-cold interface 123.

[0033] Let's combine the following... Figures 1-4As shown, in one embodiment of this utility model, the gluing machine 100 further includes a first flow guiding device 140, a first air blowing device 150, and a first cold air device 160. The first flow guiding device 140 is located at the top of the heating zone 111 of the upward oven 110, forming a downward return airflow. The first air blowing device 150 is located at the bottom of the cooling zone 112 of the upward oven 110, providing a first airflow to the semi-cured sheet 200 that intersects with its direction of movement. More specifically, the first flow guiding device 140 and the first air blowing device 150 are disposed adjacent to the hot-cold interface 113. The first cold air device 160 is located above the first air blowing device 150, providing cold air to cool the semi-cured sheet 200, and the pressure of the cold air provided by the first cold air device 160 is less than the pressure of the first airflow provided by the first air blowing device 150. In this way, as the prepreg 200 rises within the upward oven 110, the first airflow guide device 140 blocks the upward-rushing hot air from the heating zone 121, causing the hot air to redirect downwards and preventing it from rising. Furthermore, the impact curtain of the first airflow blown by the first air-blowing device 150 disrupts the tendency of the hot airflow to rise along the surface of the prepreg 200, thereby reducing the wall-pushing effect. Simultaneously, because the pressure of the first airflow provided by the first air-blowing device 150 is relatively high, it effectively prevents the downward flow of cold air from above. This mitigates the problems of airflow sinking and rising.

[0034] Continue reading Figure 1 As shown, in one embodiment of this utility model, the gluing machine 100 further includes a second flow guiding device 170 and a second air blowing device 180. The second flow guiding device 170 is located at the top of the heating zone 121 of the downward drying oven 120, and is used to form downward return air, such as... Figure 1 As indicated by arrow B, the second air blowing device 180 is located at the top and / or bottom of the cooling zone 122 of the descending oven 120, and is used to provide a second airflow to the prepreg 200 that is intersecting with its direction of movement. Thus, as the prepreg 200 descends through the descending oven 120, on the one hand, the second air guiding device 170 blocks the hot air rising from the heating zone 121, causing the hot air to turn downwards and preventing it from rising; on the other hand, the second air blowing device 180 blows the second airflow to both sides of the prepreg 200. The impact of the second airflow disrupts the tendency of the hot airflow to rise along the surface of the prepreg 200, thereby reducing the wall-pushing effect of the hot air and effectively suppressing the hot air rising along the surface of the prepreg 200, thus preventing the hot air from rising and entering the top roller chamber 130, and further preventing the prepreg 200 from folding under the top roller.

[0035] The following is combined Figures 1-3As shown, in one embodiment of this utility model, the first airflow guiding device 140 includes a through-hole 141 and two baffles 142 disposed on both sides of the through-hole 141, each baffle 142 having an arc-shaped structure. Furthermore, when the first airflow guiding device 140 is installed, the concave surface of each baffle 142 faces the heating zone 111, that is, the concave surface of each baffle 142 faces downwards. In this way, the upward-rushing hot air will be blocked by the baffles 142, and the concave surface of the baffles 142 guides the hot air to form a downward return airflow, such as... Figure 1 As shown by the middle arrow A, at the same time, the kinetic energy of part of the hot air return is used to suppress the rising hot air. Therefore, the problem of hot air rising can be effectively improved, thereby effectively improving the cooling effect of the prepreg 200 and enhancing the cooling uniformity of the prepreg 200.

[0036] In this embodiment, the first flow guiding device 140 includes a housing 140a, with the channel opening 141 penetrating the top and bottom of the housing 140a. Two baffles 142 are respectively installed inside the housing 140a, and the two baffles 142 are symmetrically arranged along a plane P passing through the center line of the length direction of the channel opening 141. That is, the two baffles 142 are symmetrically arranged on both sides of the plane P, and the length direction of the two baffles 142 is consistent with the length direction of the channel opening 141. Figure 2-3 As shown. Baffles 142 are provided on both sides of the channel opening 141. This not only reduces the size of the channel opening 141, but also blocks hot air from rising, thereby improving the cooling effect of the prepreg 200 and enhancing the cooling uniformity of the prepreg 200.

[0037] In this embodiment, the housing 140a has a length of 1860mm, a width of 200mm, and a height of 100mm. The channel opening 141 has a length of 1460mm, a width of 100mm, and a height of 100mm. The length and width of the channel opening 141 are designed to accommodate the swaying and lateral deviation of the prepreg 200. Furthermore, the dimensions of the channel opening 141 are kept to a minimum, thereby reducing the opening on the hot and cold interface 113 and further reducing the movement of hot and cold air.

[0038] Understandably, in other embodiments, the size of the channel opening 141 can be flexibly set according to the specific size of the prepreg 200 and its swaying or deviation.

[0039] Combined again Figures 1-3 As shown, in this embodiment, the structure of the second flow guiding device 170 is the same as that of the first flow guiding device 140, so it will not be described again.

[0040] The following is combined Figure 1 , Figure 4 As shown, in one embodiment of this utility model, the first air blowing device 150 includes two symmetrically arranged first air knives 151, each of which has a narrow and thin nozzle 151a, such as... Figure 4 As shown. After the first air blowing device 150 is installed, the nozzles 151a of the two first air knives 151 are arranged opposite each other, and a first channel for the semi-cured sheet 200 to pass through is formed between the two first air knives 151. The two first air knives 151 form opposing first airflows. This first airflow forms a uniform airflow sheet with high pressure, that is, the first air knives 151 generate an airflow sheet with strong impact force and low shear force. In this way, when the two opposing first airflows blow towards both sides of the semi-cured sheet 200, the impact curtain of the first airflow disrupts the hot airflow tendency on the surface of the semi-cured sheet 200, thereby reducing the hot air wall effect and effectively slowing down the sinking of the cold airflow. At the same time, since the two first air knives 151 are installed at the hot-cold interface 113 where hot and cold air meet, the hot and cold air are mixed by means of the guiding effect of the first airflow, reducing the temperature difference and thus improving the cooling effect of the semi-cured sheet 200.

[0041] In this embodiment, each first air knife 151 is supplied with compressed air at a pressure of 2-6 kg. The compression ratio of the high-pressure chamber of the first air knife 151 to the compressed air is 40:1, which reduces the velocity loss of the compressed air while ensuring the airflow pressure. The compressed air entering the high-pressure chamber of the first air knife 151 is ejected at high speed through a narrow, thin nozzle 151a, forming a thin sheet of airflow with strong impact force and low shear force in front of the first air knife 151. This thin sheet of airflow is the first airflow, and the thickness of the first airflow formed by each first air knife 151 is less than or equal to 0.05 mm. The thin sheet of airflow formed by the first airflow can draw in 30-40 times the amount of ambient air, thereby forming a thin, high-intensity, high-airflow impact air curtain. The impact air curtain blows onto the side of the semi-cured sheet 200, thereby disrupting the airflow trend that runs along or down the surface of the semi-cured sheet 200, thus reducing the flow of hot and cold air, especially preventing the cold air from running down the cooling zone 112.

[0042] Continue reading Figure 1As shown, in one embodiment of this utility model, the first cold air device 160 includes multiple pairs of first cold air nozzles 161 arranged sequentially at intervals. A first channel for the semi-cured sheet 200 to pass through is formed between each pair of first cold air nozzles 161, and the pressure of each pair of first cold air nozzles 161 is less than the pressure of the first airflow generated by the first blowing device 150. Since the semi-cured sheet 200 entering the cooling zone 112 from the heating zone 111 needs to be rapidly cooled, the cold air blown out by each pair of first cold air nozzles 161 is cooled air. Thus, when the semi-cured sheet 200 passes through the first channel, the semi-cured sheet 200 is rapidly cooled by the cold air blown out by each pair of first cold air nozzles 161. Furthermore, the multiple pairs of first cold air nozzles 161 blow air onto both sides of the semi-cured sheet 200, improving the cooling uniformity of the semi-cured sheet 200 and enhancing its cooling effect.

[0043] Continue reading Figure 1 As shown, in one embodiment of the present invention, the second air blowing device 180 is disposed at the top of the cooling zone 122 of the downward oven 120, and is used to provide a second airflow that is intersecting with the direction of movement of the semi-cured sheet 200, so as to prevent the hot air that rises along the surface of the semi-cured sheet 200 from continuing to rise and enter the top roller chamber 130.

[0044] Specifically, the second air blowing device 180 includes two symmetrically arranged second air knives 181. The structure of the second air knives 181 is the same as that of the first air knife 151, and will not be described again. After the second air blowing device 180 is installed, the nozzles of the two second air knives 181 are arranged opposite each other, and a second channel for the semi-cured sheet 200 to pass through is formed between the two second air knives 181. The two second air knives 181 form opposing second airflows, which blow towards both sides of the semi-cured sheet 200. The impact of the second airflow disrupts the tendency of the hot airflow to rise along the surface of the semi-cured sheet 200, thereby reducing the hot air wall effect and preventing the hot air from rising and entering the top roller chamber 130, effectively preventing the semi-cured sheet 200 from folding on the top roller.

[0045] In this embodiment, the second air knife 181 also uses compressed air with a pressure of 2-6 kg. The compression ratio of the high-pressure chamber of the second air knife 181 to the compressed air is 40:1, which reduces the velocity loss of the compressed air while ensuring the airflow pressure. The compressed air entering the high-pressure chamber of the second air knife 181 is ejected at high speed through a narrow, thin nozzle, forming a thin sheet of airflow with strong impact force and low shear force in front of the second air knife 181. This thin sheet of airflow is the second airflow, and the thickness of the second airflow formed by the second air knife 181 is less than or equal to 0.05 mm. The thin sheet of airflow formed by the second airflow can draw in 30-40 times the amount of ambient air, thereby forming a thin, high-intensity, high-airflow impact air curtain. The impact air curtain blows onto the side of the semi-cured sheet 200, thereby disrupting the airflow trend that is rising or falling along the surface of the semi-cured sheet 200, effectively preventing the hot air rising along the surface of the semi-cured sheet 200 from continuing to rise and enter the top roller chamber 130, thus effectively preventing the top roller from folding.

[0046] See below. Figure 5 As shown, in another embodiment of this utility model, the second air blowing device 180 is positioned differently from the embodiment described above. In this embodiment, the second air blowing device 180 is located at the bottom of the cooling zone 112 of the downward oven 120, that is, the second air blowing device 180 is located adjacent to the hot and cold interface 123, or in other words, the second air blowing device 180 is positioned approximately corresponding to the first air blowing device 150. It can also provide a second airflow to the prepreg 200 that is intersecting with its moving direction. The second airflow prevents the hot air that is rising along the surface of the prepreg 200 from continuing to rise and enter the top roller chamber 130.

[0047] In this embodiment, the structure of the other parts of the gluing machine 100 is the same as that in the above embodiment, and will not be described again.

[0048] Understandably, the second air blowing device 180 is not limited to the two configurations described above. In other embodiments, the second air blowing device 180 can also be provided at the top and bottom of the cooling zone 112 of the downward oven 120, that is, two second air blowing devices 180 can be provided to better prevent the hot air that rises along the surface of the semi-cured sheet 200 from continuing to rise and enter the top roller chamber 130.

[0049] See below. Figure 6 As shown, in another embodiment of this utility model, the gluing machine 100 and Figure 1The difference in the shown gluing machine 100 is that it further includes a second cold air device 190, which is located in the cooling zone 112 of the downward drying oven 120, specifically below the second air blowing device 180, and is used to provide cold air to cool the prepreg 200. Furthermore, the temperature of the cold air provided by the second cold air device 190 is higher than the temperature of the cold air provided by the first cold air device 160. Specifically, since the prepreg 200 entering the drying oven 120 has been turned, the temperature for cooling the prepreg 200 does not need to be too low; therefore, the temperature of the cold air provided by the second cold air device 190 is higher than the temperature of the cold air provided by the first cold air device 160. In one specific embodiment, the second cold air device 190 provides natural wind, that is, room temperature air is used to cool the prepreg 200.

[0050] More specifically, the second cooling air device 190 includes multiple pairs of second cooling air nozzles 191 arranged at intervals in sequence. The structure of the second cooling air nozzles 191 is the same as that of the first cooling air nozzles 161. After the second cooling air device 190 is installed, a second channel for the semi-cured sheet 200 to pass through is formed between each pair of second cooling air nozzles 191. Furthermore, the pressure of the cooling air provided by each pair of second cooling air nozzles 191 is less than the pressure of the second airflow generated by the second blowing device 180. In this way, when the semi-cured sheet 200, which has turned and descended after passing through the top roller chamber 130, passes through the second channel, the cooling air provided by the second cooling air nozzles 191 cools the semi-cured sheet 200. At the same time, the thin impact air curtain formed by the higher-pressure second airflow blows onto the side of the semi-cured sheet 200, which can effectively disrupt the airflow trend along the surface of the semi-cured sheet 200, effectively preventing the hot air rising along the surface of the semi-cured sheet 200 from continuing to rise and enter the top roller chamber 130, thereby effectively preventing the top roller from folding.

[0051] See below again Figure 6 As shown, with Figure 6 Taking the gluing machine 100 shown in the figure as an example, its working principle will be explained.

[0052] During the production of the prepreg 200, the prepreg 200 after being impregnated with adhesive enters the upward oven 110 from bottom to top, and passes through the heating zone 111 for heating and the cooling zone 112 for cooling in sequence. After cooling, the prepreg 200 enters the top roller chamber 130 and turns. It then enters the downward oven 120, and passes through the cooling zone 122 for cooling and the heating zone 121 for heating in sequence. Finally, it exits from the downward oven 120 for subsequent processing.

[0053] As the prepreg 200 moves upward through the channel 141 of the first guide device 140 and enters the cooling zone 112, the hot air from the heating zone 111, driven by the prepreg 200, moves upward along the surface of the prepreg 200. After rising, the hot air from the heating zone 111 is blocked by the baffle 142. The concave surface of the baffle 142 guides the hot air, forming a downward return airflow. Figure 6 As shown by the middle arrow A, at the same time, the kinetic energy of part of the hot air return is used to suppress the rising hot air. Therefore, the problem of hot air rising can be effectively improved, thereby effectively improving the cooling effect of the prepreg 200 and enhancing the cooling uniformity of the prepreg 200.

[0054] As the semi-cured sheet 200 ascends through the first channel between the first air blowing device 150 and the first cold air device 160, the cold air blown out by each pair of first cold air nozzles 161 blows towards both sides of the semi-cured sheet 200. The temperature of the cold air blown out by each pair of first cold air nozzles 161 is relatively low, thereby rapidly cooling the semi-cured sheet 200. The multiple pairs of first cold air nozzles 161 arranged in sequence improve the cooling uniformity and cooling effect of the semi-cured sheet 200. During the upward cooling process of the prepreg 200, the first airflow ejected from the nozzles 151a of a pair of first air knives 151 blows towards the two sides of the prepreg 200. The thin, high-intensity, large-airflow impact curtain formed by the first airflow disrupts the hot airflow trend on the surface of the prepreg 200, thereby reducing the hot air wall effect and reducing the movement of hot and cold air, especially preventing the cold air from moving downward in the cooling zone 112. At the same time, the two first air knives 151 are installed at the hot-cold interface 113 where hot and cold air meet. With the help of the guiding effect of the first airflow, the hot and cold air are mixed, reducing the temperature difference and thus improving the cooling effect of the prepreg 200.

[0055] As the prepreg 200 descends and passes sequentially through the second air blowing device 180 and the second cold air device 190, the prepreg 200 continues to be cooled by the natural air blown out by each pair of second cold air nozzles 191. Simultaneously, at the top of the cooling zone 122, the second airflows blown out by the two second air knives 181 blow towards both sides of the prepreg 200. Because the pressure of the second airflow is much greater than the pressure of the second cold air nozzles 191 of the second cold air device 190, the thin, high-intensity, large-volume impact air curtain formed by the second airflow disrupts the tendency of the hot airflow to rise along the surface of the prepreg 200, thereby reducing the hot air wall effect and preventing the hot air rising along the surface of the prepreg 200 from continuing to rise and enter the top roller chamber 130, effectively preventing the prepreg 200 from folding on the top roller.

[0056] After the prepreg 200 descends into the heating zone 121, it continues to descend through the channel of the second air blowing device 180. The hot air from the heating zone 121 rises and is blocked by the baffle plate of the second air blowing device 180. The concave surface of the baffle plate guides the hot air, creating a downward return airflow. Figure 6 As shown by arrow B, at the same time, the kinetic energy of part of the hot air return is used to suppress the rising hot air. Therefore, the problem of hot air rising can be effectively improved, and the hot air can be effectively prevented from rising along the semi-cured sheet 200 and finally entering the top roller chamber 130.

[0057] In summary, the gluing machine 100 of this invention firstly sets a first air guiding device 140 at the top of the heating zone 111 of the upward drying oven 110. The first air guiding device 140 forms a downward return airflow, causing the upward-rushing hot air to be redirected downwards under the action of the first air guiding device 140. Simultaneously, some of the kinetic energy of the hot air is used to suppress the hot air, thereby improving the problem of hot air rising. Secondly, a first air blowing device 150 is set at the bottom of the cooling zone 112 of the upward drying oven 110, using the first air blowing device 150 to direct... The prepreg 200 provides a first airflow that intersects with its direction of movement. The impact of the first airflow disrupts the hot airflow trend on the surface of the prepreg 200, thereby reducing the hot air wall effect and the downward flow of cold air. At the same time, the first airflow mixes the hot and cold air, reducing the temperature difference and thus mitigating the problems of airflow sinking and rising. This effectively improves the cooling effect of the prepreg 200, enhances the uniformity of the cooling temperature of the prepreg 200, and improves the stability of the prepreg 200 production process.

[0058] The structures of other parts of the gluing machine 100 involved in this utility model are all conventional structures well known to those skilled in the art, and will not be described in detail here.

[0059] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model application shall still fall within the scope of the present utility model.

Claims

1. A sizing machine comprising a top oven and a bottom oven separated from each other and a top roll chamber communicating with each of the top oven and the bottom oven, the top oven and the bottom oven each comprising a heating zone and a cooling zone communicating with each other, characterized in that, Further comprising: a first air guiding device arranged at the top of the heating zone of the upgoing oven for forming downward return air; a first air blowing device arranged at the bottom of the cooling zone of the upgoing oven for providing first air flow to the prepreg crosswise to the moving direction of the prepreg; a first cold air device arranged above the first air blowing device for providing cold air to cool the prepreg.

2. The gluing machine of claim 1, wherein Further comprising: a second air guiding device arranged at the top of the heating zone of the downgoing oven for forming downward return air; a second air blowing device arranged at the top and / or bottom of the cooling zone of the downgoing oven for providing second air flow to the prepreg crosswise to the moving direction of the prepreg.

3. The gluing machine of claim 2, wherein The first air guiding device and the second air guiding device each comprise a channel opening and two air baffle plates arranged at both sides of the channel opening, each of the air baffle plates is in an arc shape, and the concave surface of each of the air baffle plates faces the heating zone.

4. The gluing machine of claim 3, wherein The first air guiding device and the second air guiding device each comprise a box body, the channel opening penetrates the top and bottom of the box body, and the two air baffle plates are respectively installed in the box body and are arranged symmetrically along the center line of the length direction of the channel opening.

5. The gluing machine of claim 1, wherein The first air blowing device comprises two first air knives arranged symmetrically, a first channel for the prepreg to pass through is formed between the two first air knives, and the two first air knives form opposite first air flow, the pressure of the first air flow is greater than the pressure of the cold air provided by the first cold air device.

6. The gluing machine of claim 5, wherein Each of the first air knives uses compressed air with a pressure of 2-6 Kg for air supply, and the thickness of the first air flow formed by each of the first air knives is less than or equal to 0.05 mm.

7. The gluing machine of claim 2, wherein The second air blowing device comprises two second air knives arranged symmetrically, a second channel for the prepreg to pass through is formed between the two second air knives, and the two second air knives form opposite second air flow.

8. The gluing machine of claim 7, wherein Each of the second air knives uses compressed air with a pressure of 2-6 Kg for air supply, and the thickness of the second air flow formed by each of the second air knives is less than or equal to 0.05 mm.

9. The gluing machine according to any of claims 1-8, characterized in that, The first cold air device comprises a plurality of pairs of first cold air nozzles arranged in sequence, a first channel for the prepreg to pass through is formed between each pair of the first cold air nozzles, and the pressure of each of the first cold air nozzles is less than the pressure of the first air flow generated by the first air blowing device.

10. The gluing machine according to any of claims 2-4, 7-8, characterized in that, Further comprising a second cold air device arranged in the cooling zone of the downgoing oven, the second cold air device comprises a plurality of pairs of second cold air nozzles arranged in sequence, a second channel for the prepreg to pass through is formed between each pair of the second cold air nozzles, the pressure of the cold air provided by each of the second cold air nozzles is less than the pressure of the second air flow generated by the second air blowing device, and the temperature of the cold air provided by each of the second cold air nozzles is higher than the temperature of the cold air provided by the first cold air device.

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