A glue spraying machine for metal composite insulation board production

Abstract

The application discloses a glue pouring machine for metal composite insulation board production and relates to the technical field of glue pouring equipment. A mounting seat is arranged on a slider of a linear guide rail reciprocating mechanism, a first platform and a second platform are arranged on the mounting seat, a box body is arranged at the upper end of the second platform, a heating head capable of moving up and down is arranged in the box body, the upper end of the heating head is connected with a lifting mechanism arranged on the first platform, a nozzle is arranged at the lower end of the second platform, the nozzle is communicated with the box body through a connecting pipe, a transmission mechanism is arranged below the mounting seat, one end of the transmission mechanism is connected with the lifting mechanism, the other end of the transmission mechanism is connected with a first gear, the first gear is meshed with a rack at the lower end of a rack, and an air supply mechanism is arranged on the transmission mechanism. When the slider moves back and forth, the first gear drives the transmission mechanism to rotate under the action of the rack, and simultaneously drives the lifting mechanism to make the heating head lift and down and drives the air supply mechanism to blow air to the glue-poured plate for pre-drying. The application makes the glue material be heated more uniformly, reduces the load of the subsequent drying channel, and does not need to additionally arrange a power source, and the structure is compact and the action is synchronous.

Description

Technical Field

[0001] This invention relates to the technical field of metal composite insulation board production equipment, specifically to a glue-applying machine for the production of metal composite insulation boards. Background Technology

[0002] The production process of metal composite insulation boards typically involves applying adhesive to the surface of a metal sheet before bonding the insulation layer, panel, or other functional layers to the metal sheet. The quality of the adhesive application directly affects the composite strength, surface smoothness, and subsequent drying efficiency. Existing adhesive application machines mostly use a linear guide reciprocating mechanism to drive the nozzle to move back and forth. The adhesive in the supply hopper is conveyed to the nozzle via a connecting pipe, and then applied to the surface of the metal composite insulation board. While such equipment can complete basic adhesive application operations in a conventional workshop environment, some relatively common problems arise in actual production.

[0003] On the one hand, the temperature of the adhesive compound has a significant impact on the quality of the coating. Water-based adhesives or other adhesives that require heating to maintain fluidity are prone to cooling during transport in workshops with low ambient temperatures, especially when the distance between the supply box and the nozzle is large. This leads to increased viscosity and decreased fluidity. When the adhesive temperature is too low, defects such as coating bubbles, poor leveling, and uneven thickness are likely to occur after coating onto the board surface. To address this issue, some existing technologies have attempted to add a heating process between the supply box and the nozzle, such as using a fixed heating head to heat the adhesive. However, with a fixed heating head, the adhesive is heated unevenly within the box or along the transport path. The adhesive near the heating head is hotter, while the adhesive further away is colder. Even after long-term use, localized low-temperature adhesive will still occur, and defects such as bubbles and leveling are difficult to eliminate reliably.

[0004] On the other hand, the boards after glue application typically need to enter a subsequent drying tunnel for further drying. For water-based adhesives, the glue layer contains a significant amount of moisture after application. If the boards enter the drying tunnel directly, the initial section of the tunnel will have to bear a heavy load for dehumidification and heating. When the production line speed is high, the glue layer may not dry in time, easily leading to problems such as sagging, glue accumulation at the edges, and adhesion to the guide rollers or pressure rollers. If the subsequent drying tunnel is relied upon entirely after glue application, the length, temperature, or airflow of the drying tunnel needs to be increased, resulting in higher equipment energy consumption and production costs. Existing technologies also include the idea of ​​setting up a separate fan for blowing air after glue application, but ordinary fans are often fixed in place, and the airflow direction and speed are difficult to coordinate with the reciprocating movement of the nozzle, easily leading to new problems such as localized strong blowing, glue surface ripples, surface skinning, and difficulty in removing internal moisture. At the same time, if separate power sources and control devices are set for the heating head lifting and pre-drying fan, the structure will not only be complex, but it will also increase installation space, potential failure points, and control costs.

[0005] As can be seen from the above problems, the technical problems that existing glue coating machines need to solve are: uneven heating of the glue during conveying and coating process, low temperature glue is prone to bubbles and poor leveling; water-based glue does not dry in time after coating, which is prone to dripping and sticking, and increases the load on the subsequent drying tunnel; and adding a separate heating lifting mechanism and air supply mechanism requires an additional power source, which is difficult to synchronize with the reciprocating motion of the nozzle. Summary of the Invention

[0006] The purpose of this invention is to provide a glue-applying machine for the production of metal composite insulation boards, which utilizes the mechanical energy of the reciprocating movement of the nozzle to simultaneously raise and lower the glue heating head and pre-dry the board after glue application, thereby improving the uniformity of glue heating, reducing the load on the subsequent drying tunnel, and reducing sagging and adhesion.

[0007] To achieve the above objectives, this application adopts the following technical solution.

[0008] A glue-applying machine for producing metal composite insulation boards includes a linear guide reciprocating mechanism. A mounting base is provided on the slider of the linear guide reciprocating mechanism. A first platform and a second platform are arranged sequentially from top to bottom on the mounting base. A housing is mounted on the upper end of the second platform, and a heating head capable of moving up and down is installed inside the housing. The upper end of the heating head is connected to a lifting mechanism that drives the heating head to move up and down and is located on the first platform. A nozzle is mounted on the lower end of the second platform. The nozzle is connected to the housing via a connecting pipe, allowing the glue material inside the housing to be conveyed to the nozzle. A transmission mechanism is also provided below the mounting base. One end of the transmission mechanism is connected to the lifting mechanism, and the other end is connected to a first gear. The first gear is connected to a rack, which is installed at the lower end of the frame in the linear guide reciprocating mechanism. An air supply mechanism is also installed on the transmission mechanism, so that when the transmission mechanism rotates, it can simultaneously drive the air supply mechanism and the lifting mechanism to move, thereby raising and lowering the heating head and blowing air onto the glue-applying metal composite insulation board for pre-drying.

[0009] Furthermore, a pressure pump is also installed between the nozzle and the housing.

[0010] Furthermore, the heating head is slidably connected to the housing, and a connecting rod is fixed to the upper end of the heating head, with the upper end of the connecting rod connected to the lifting mechanism.

[0011] Furthermore, the lifting mechanism includes a rectangular tube, a cam, and a second gear. The lower end of the rectangular tube is connected to a connecting rod and is also equipped with two symmetrically arranged guide columns. The lower end of the guide columns passes through the first platform and is connected to a limit nut. The cam is located inside the rectangular tube and is connected to the second gear by means of a connecting shaft.

[0012] Furthermore, one end of the connecting shaft located on the second gear is rotatably connected to the mounting base by means of a bearing; a first bearing seat is also installed between the second gear and the cam, and the connecting shaft is rotatably connected to the first bearing seat through the bearing.

[0013] Furthermore, the transmission mechanism includes a transmission shaft and a third gear, the third gear being located below and meshing with the second gear, one end of the transmission shaft passing through the mounting base and connected to the second gear; the other end of the transmission shaft being connected to the first gear; and the air supply mechanism being mounted on the transmission shaft.

[0014] Furthermore, the drive shaft is rotatably connected to the mounting base by means of a bearing; a second bearing seat is also installed between the air supply mechanism and the first gear, and the drive shaft is rotatably connected to the second bearing seat by means of a bearing; a connecting seat is also connected between the mounting base and the slider, and the upper end of the second bearing seat is installed at the lower end of the connecting seat.

[0015] Furthermore, the air supply mechanism includes a central bushing and multiple fan blades. The central bushing is fixedly mounted on the transmission shaft, and the multiple fan blades are circumferentially fixed on the central bushing. The outer periphery of the air supply mechanism is also provided with a wind cover that can enclose the air supply mechanism. The wind cover is fixedly mounted to the mounting base by means of a side bracket. The lower end of the wind cover is provided with an air outlet. A partition parallel to the mounting base is provided at the air outlet and divides the air outlet into a first air outlet and a second air outlet.

[0016] Furthermore, the distance between the air vent and the nozzle is at least 40cm.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) In this application, the mechanical energy of the reciprocating movement of the nozzle is transmitted to the lifting mechanism through a rack, first gear, drive shaft, third gear, second gear and cam, and at the same time the air supply mechanism is driven through the same drive shaft. The heating head moves up and down in the box, so that the rubber material in the box is heated more evenly, reducing the tendency of low temperature rubber material to produce bubbles and poor leveling; the air supply mechanism blows air to the metal composite insulation board after the glue is applied for pre-drying, so that the surface drying of the glue layer is accelerated, reducing sagging, edge glue accumulation and adhesion, and reducing the dehumidification load of the front section of the subsequent drying tunnel. Since the lifting of the heating head and the operation of the air supply mechanism are both derived from the reciprocating motion of the linear guide reciprocating mechanism, there is no need to set up an independent power source such as a motor or cylinder, the structure is compact and the action synchronization is good.

[0019] (2) The air supply mechanism uses a fan shroud to enclose the fan blades. The air inlet at the lower end of the shroud is divided into a first air inlet and a second air inlet by a partition. When the drive shaft reciprocates with the nozzle, the first and second air inlets alternate between the air inlet and the air outlet, so that the pre-drying airflow is not limited to a continuous strong blowing in a fixed direction. It can be coordinated with the reciprocating rhythm of the nozzle, reducing the ripples, skinning, or disturbance caused by excessive blowing on the local adhesive surface. Maintaining a distance of at least 40cm between the air inlet and the nozzle also helps to avoid the adhesive surface that has not yet leveled, so that pre-drying can be carried out after the adhesive layer has completed the initial leveling. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 for Figure 1 Side view;

[0022] Figure 3 This is a top view of the box body in this invention;

[0023] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0024] Figure 5 This is a cross-sectional view of the air supply mechanism in this invention;

[0025] Figure 6 This is a schematic diagram of the invention after the outer casing has been added;

[0026] Explanation of markings in the diagram:

[0027] 1-Linear guide rail reciprocating mechanism; 2-Slider; 3-Mounting seat; 4-First platform; 5-Second platform; 6-Box; 7-Heating head; 8-Lifting mechanism; 9-Nozzle; 10-Connecting pipe; 11-Transmission mechanism; 12-First gear; 13-Rack; 14-Frame; 15-Air supply mechanism; 16-Pressure pump; 17-Connecting rod; 18-Rectangular tube; 19-Cam; 20-Second gear; 21-Guide column; 22-Limit nut; 23-Connecting shaft; 24-First bearing seat; 25-Transmission shaft; 26-Third gear; 27-Second bearing seat; 28-Connecting seat; 29-Central bushing; 30-Fan blade; 31-Fan cover; 32-Side bracket; 33-Baffle; 34-First air outlet; 35-Second air outlet. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] The technical concept of this invention lies not in adding a separate heating device or a separate pre-drying fan, but in reusing the reciprocating motion of the linear guide rail already present in the glue-coating machine. When the nozzle reciprocates horizontally with the slider, the mounting base and its first platform, second platform, housing, nozzle, lifting mechanism, transmission mechanism, and air supply mechanism move together. Since the rack is fixed to the lower end of the frame, and the first gear is mounted on the transmission mechanism and meshes with the rack, the first gear is driven to rotate by the rack when the mounting base moves. After the first gear rotates, the transmission shaft receives rotational power. On one hand, the transmission shaft converts the rotational motion into the up-and-down reciprocating motion of the heating head through the third gear, second gear, and cam, causing the heating head to continuously change position within the housing for more uniform heating of the glue material; on the other hand, the transmission shaft directly drives the fan blades of the air supply mechanism to rotate, blowing air onto the surface of the glue-coated metal composite insulation board for pre-drying. In this way, the heating of the adhesive and the pre-drying after coating share the same motion source, and the movement is naturally synchronized with the reciprocating movement of the nozzle, eliminating the need for additional motors, cylinders, or complex control programs to drive the air supply and lifting mechanisms. The design of the air hood and baffles allows the air supply mechanism to alternate between the first and second air outlets during forward and reverse rotation, preventing a fixed air outlet from blowing directly onto the same position for an extended period.

[0030] See Figures 1 to 6 The coating machine provided in this application includes a linear guide reciprocating mechanism 1. The linear guide reciprocating mechanism 1 can be driven by a motor in conjunction with a reciprocating screw to move a slider 2 back and forth. A mounting base 3 is mounted on the slider 2, and the mounting base 3 moves back and forth in the horizontal direction with the slider 2. A first platform 4 and a second platform 5 are provided on the mounting base 3. The first platform 4 is located above the second platform 5. Both can be fixedly connected to the mounting base 3, or they can be connected to the mounting base 3 through a bracket, column, or connecting plate. An installation space is left between the first platform 4 and the second platform 5 to accommodate components such as a lifting mechanism 8, a housing 6, and a connecting pipe 10.

[0031] A housing 6 is installed at the upper end of the second platform 5. The housing 6 is used to hold the adhesive material. The housing 6 can be a closed or semi-closed structure and can be equipped with an insulation layer, inlet, liquid level sensor, or temperature sensor as needed. A heating head 7 is installed inside the housing 6, and the heating head 7 can move up and down relative to the housing 6. The heating head 7 can be an electric heating tube, electric heating plate, heating rod, heating element, or other components capable of heating the adhesive material. A connecting rod 17 is fixed to the upper end of the heating head 7, extending upwards and connecting to a lifting mechanism 8. The heating head 7 is slidably connected inside the housing 6, and its sliding method is that the connecting rod 17 is slidably connected to a guide hole at the upper end of the housing 5. The lifting mechanism 8 is located on the first platform 4 and is used to drive the connecting rod 17 and the heating head 7 to move up and down.

[0032] A nozzle 9 is installed at the lower end of the second platform 5. The nozzle 9 can be a slit type, multi-hole type, slot type, or other spraying structure suitable for adhesive application. The nozzle 9 is connected to the housing 6 via a connecting pipe 10. The adhesive material inside the housing 6 is transported to the nozzle 9 via the connecting pipe 10 and then sprayed onto the surface of the metal composite insulation board. To ensure more stable adhesive delivery, a pressure pump 16 is also installed between the nozzle 9 and the housing 6. The pressure pump 16 can be installed on the connecting pipe 10 or at the outlet of the housing 6. The pressure pump 16 can be a gear pump, screw pump, diaphragm pump, or other pumping structure suitable for conveying adhesive. An insulation layer or heating jacket can be installed on the connecting pipe 10 as needed to reduce the temperature drop of the adhesive material during transport.

[0033] A transmission mechanism 11 is located below the mounting base 3. One end of the transmission mechanism 11 is connected to the lifting mechanism 8, and the other end is connected to a first gear 12. The first gear 12 meshes with a rack 13, which is mounted on the lower end of the frame 14 in the linear guide reciprocating mechanism 1. The frame 14 is the fixed part of the linear guide reciprocating mechanism 1. The rack 13 extends along the reciprocating direction of the slider 2, and its length at least covers the working stroke of the slider 2. When the mounting base 3 moves with the slider 2, the first gear 12 rolls on the rack 13, thereby rotating. When the first gear 12 rotates, it drives the transmission mechanism 11 to operate, and the transmission mechanism 11 then transmits the motion to the lifting mechanism 8 and the air supply mechanism 15.

[0034] The lifting mechanism 8 can use a cam mechanism to achieve the lifting and lowering of the heating head 7. Specifically, the lifting mechanism 8 includes a rectangular tube 18, a cam 19, and a second gear 20. The lower end of the rectangular tube 18 is connected to the connecting rod 17. The rectangular tube 18 is also equipped with two symmetrically arranged guide posts 21, the lower ends of which pass through the first platform 4 and are connected to a limit nut 22. The guide posts 21 slide in contact with guide holes on the first platform 4, so that the rectangular tube 18 can only move in the vertical direction. The limit nut 22 is used to limit the extreme position of the guide posts 21 when they come out upwards, and can cooperate with the first platform 4 to limit the lifting stroke. The cam 19 is located inside the rectangular tube 18, and the outer periphery of the cam 19 contacts or is close to contacting the inner wall of the rectangular tube 18. The cam 19 is connected to the second gear 20 via a connecting shaft 23. When the second gear 20 rotates, it drives the connecting shaft 23 and the cam 19 to rotate. When the cam 19 rotates inside the rectangular tube 18, the rectangular tube 18 is pushed up and down due to the eccentric effect of the cam 19, which in turn drives the heating head 7 to move up and down inside the housing 6 through the connecting rod 17.

[0035] One end of the connecting shaft 23 located on the second gear 20 is rotatably connected to the mounting base 3 via a bearing. A first bearing seat 24 is also installed between the second gear 20 and the cam 19, and the connecting shaft 23 is rotatably connected to the first bearing seat 24 via the bearing. This provides more stable support for the connecting shaft 23 and reduces the wobbling when the cam 19 rotates. The first bearing seat 24 can be fixed to the mounting base 3, the first platform 4, or the second platform 5, with the specific installation position determined by its ability to stably support the connecting shaft 23.

[0036] The transmission mechanism 11 includes a transmission shaft 25 and a third gear 26. The third gear 26 is located below and meshes with the second gear 20. One end of the transmission shaft 25 passes through the mounting base 3 and is connected to the transmission chain containing the second gear 20. For example, one end of the transmission shaft 25 is connected to the third gear 26, and the third gear 26 meshes with the second gear 20; it can also be understood that the transmission shaft 25 forms a transmission connection with the second gear 20 through the third gear 26. The other end of the transmission shaft 25 is connected to the first gear 12. The air supply mechanism 15 is mounted on the transmission shaft 25. When the first gear 12 rotates, the transmission shaft 25 rotates synchronously. The third gear 26 on the transmission shaft 25 drives the second gear 20 to rotate, and the second gear 20 then drives the cam 19 to rotate through the connecting shaft 23. At the same time, the transmission shaft 25 directly drives the air supply mechanism 15 to rotate. Thus, the rotation of the first gear 12 simultaneously produces two outputs: one output for raising and lowering the heating head 7, and the other output for blowing air through the air supply mechanism 15.

[0037] The drive shaft 25 is rotatably connected to the mounting base 3 via bearings. A second bearing housing 27 is also installed between the air supply mechanism 15 and the first gear 12, and the drive shaft 25 is rotatably connected to the second bearing housing 27 via bearings. A connecting seat 28 is also connected between the mounting base 3 and the slider 2, and the upper end of the second bearing housing 27 is mounted on the lower end of the connecting seat 28. Through the cooperation of the mounting base 3 and the second bearing housing 27, the drive shaft 25 can maintain stable rotation over a long span, reducing vibration caused by reciprocating movement and gear meshing.

[0038] The air supply mechanism 15 includes a central bushing 29 and multiple fan blades 30. The central bushing 29 is mounted and fixed on the drive shaft 25, and the multiple fan blades 30 are circumferentially fixed on the central bushing 29. The fan blades 30 can adopt axial flow, centrifugal, or mixed flow blade structures. When the drive shaft 25 rotates, the central bushing 29 drives the fan blades 30 to rotate, thereby generating airflow. A fan shroud 31 is also provided on the outer periphery of the air supply mechanism 15 to enclose it. The fan shroud 31 is mounted and fixed to the mounting base 3 by means of side brackets 32. The fan shroud 31 can guide the airflow and prevent the airflow generated by the fan blades 30 from scattering, while also providing a certain degree of protection by reducing the entry of adhesive mist, dust, or foreign objects into the fan blade 30 area.

[0039] An air vent is provided at the lower end of the fan cover 31. A partition 33 parallel to the mounting base 3 is provided at the air vent, dividing the air vent into a first air vent 34 and a second air vent 35. The partition 33 can be set along the centerline of the air vent, or it can be offset according to the width of the board, the thickness of the adhesive layer, and the pre-drying requirements. When the drive shaft 25 rotates forward and backward with the nozzle 9, the air supply mechanism 15 also rotates forward and backward synchronously. When the fan blade 30 rotates forward, one of the first air vent 34 and the second air vent 35 can be used as an air outlet, and the other can be used as an air inlet; when the fan blade 30 rotates backward, the roles of the two air inlets and outlets alternate. In this way, the direction and strength of the pre-drying airflow will change with the reciprocating rhythm of the nozzle 9, avoiding the fixed air vent from continuously blowing strongly at the same position. The distance between the air vent and the nozzle 9 is at least 40cm. This distance allows the adhesive to undergo preliminary leveling over a distance before the airflow acts on the adhesive surface, reducing the direct disturbance of the airflow to the unleveled adhesive surface.

[0040] The working process of this invention will be explained in detail below:

[0041] During operation, the linear guide reciprocating mechanism 1 drives the slider 2 to reciprocate horizontally. The slider 2 drives the mounting base 3 and its mounted components—first platform 4, second platform 5, housing 6, heating head 7, lifting mechanism 8, nozzle 9, transmission mechanism 11, and air supply mechanism 15—to reciprocate together. The feeding equipment stably supplies adhesive into the housing 6. The adhesive inside the housing 6 is conveyed to the nozzle 9 via the connecting pipe 10 and the pressurizing pump 16, and then sprayed onto the surface of the metal composite insulation board. The metal composite insulation board can be continuously conveyed forward by a conveyor roller or conveyor belt, and the nozzle 9 reciprocates above the board, thereby forming an adhesive layer within the width of the board or a designated area.

[0042] During the reciprocating movement of the nozzle 9, since the rack 13 is fixed to the lower end of the frame 14, the first gear 12 meshes with the rack 13, and the first gear 12 rotates when the mounting base 3 moves. The first gear 12 drives the transmission shaft 25 to rotate synchronously. The third gear 26 on the transmission shaft 25 drives the second gear 20 to rotate, and the second gear 20 drives the cam 19 to rotate through the connecting shaft 23. The cam 19 rotates inside the rectangular tube 18, pushing the rectangular tube 18 to move up and down. Under the constraint of the guide post 21 and the limit nut 22, the rectangular tube 18 rises and falls stably in the vertical direction, and drives the heating head 7 to move up and down inside the housing 6 through the connecting rod 17. After the heating head 7 moves up and down, its relative position with the adhesive material inside the housing 6 changes, avoiding the heating head 7 from always staying at the same height and causing local overheating or insufficient heating. For water-based adhesives, the adhesive temperature is more uniform, the fluidity is more stable, and the tendency for bubbles and poor leveling in the coating after coating is reduced.

[0043] Meanwhile, the rotation of the drive shaft 25 drives the central bushing 29 and the fan blades 30 to rotate. The fan blades 30 generate airflow within the fan shroud 31. The airflow is blown out through the air inlet at the lower end of the fan shroud 31. Because the partition 33 divides the air inlet into a first air inlet 34 and a second air inlet 35, and the drive shaft 25 rotates forward and backward with the reciprocating motion of the nozzle 9, the first air inlet 34 and the second air inlet 35 alternate between the air inlet and the air outlet. The blown airflow acts on the surface of the metal composite insulation board after adhesive application, pre-drying the adhesive layer. Pre-drying accelerates the evaporation of surface moisture from the water-based adhesive, shortens the surface drying time of the adhesive layer, and makes the board less prone to sagging, edge adhesive accumulation, and adhesion to other components before entering the subsequent drying tunnel. The dehumidification load of the front section of the subsequent drying tunnel is also reduced, which is beneficial for increasing the production line speed or reducing the energy consumption of the front section of the drying tunnel.

[0044] Because the distance between the air outlet and the nozzle 9 is at least 40cm, the airflow will not directly blow onto the adhesive surface that has just left the nozzle 9 and has not yet completed leveling. After leaving the nozzle 9, the adhesive undergoes a period of natural leveling before being subjected to alternating airflow, making it less prone to ripples, orange peel, or localized skinning on the surface. The fan cover 31 encloses the fan blades 30, and the side bracket 32 ​​fixes the fan cover 31 to the mounting base 3, allowing the air supply mechanism 15 to move together with the mounting base 3, maintaining a correspondence between the airflow position and the reciprocating position of the nozzle 9. In this way, wherever the nozzle 9 moves to, the air supply mechanism 15 also performs pre-drying in a nearby area, resulting in a relatively stable time interval between pre-drying and adhesive application.

[0045] In actual production, the transmission ratio of the first gear 12 to the rack 13, the transmission ratio of the third gear 26 to the second gear 20, the eccentricity of the cam 19, and the specifications of the fan blade 30 can be adjusted according to the solid content, viscosity, adhesive layer thickness, sheet conveying speed, and workshop ambient humidity of the water-based adhesive. The transmission ratio of the first gear 12 to the rack 13 can be set to allow the transmission shaft 25 to rotate several times within one reciprocating stroke of the slider 2, thereby ensuring that the cam 19 can complete multiple lifting and lowering actions and that the fan blade 30 obtains sufficient speed. The transmission ratio of the third gear 26 to the second gear 20 should not be too large, so as to prevent the cam 19 from rotating too fast and causing the heating head 7 to lift and lower too frequently; nor should it be too small, so as to prevent the heating head 7 from staying in the same position for a long time. The eccentricity of the cam 19 can be determined according to the height of the housing 6 and the stroke of the heating head 7. Usually, it is sufficient to allow the heating head 7 to make small continuous lifting and lowering within the housing 6.

[0046] The airflow of the air supply mechanism 15 can be adjusted by the angle of the fan blades 30, the number of fan blades 30, the shape of the fan shroud 31, and the area of ​​the air outlet. For the pre-drying of water-based adhesives, the air velocity should not be too high. When the air velocity is too high, the adhesive surface is easily blown into streaks, or even the surface dries and forms a skin before the internal moisture is easily discharged. In actual use, the average air velocity at the air outlet can be controlled in a low range, such as 0.5 m / s to 2 m / s, and small-scale tests should be conducted according to the technical specifications provided by the adhesive supplier. A filter or flow equalization plate can also be installed inside the fan shroud 31 to make the airflow from the first air outlet 34 and the second air outlet 35 more uniform. If the ambient temperature in the workshop is low, a low-temperature heating element can also be installed inside the fan shroud 31 or at the air outlet to make the pre-drying airflow slightly higher than the ambient temperature, but the temperature should not exceed the allowable drying conditions of the adhesive.

[0047] The heating head 7 inside the housing 6 can be electrically heated. The lifting and lowering of the heating head 7 is driven by the cam 19, a simple structure that eliminates the need for separate limit switches or control valves. The guide post 21 and the limit nut 22 both guide and limit the extreme positions of the rectangular tube 18. The first bearing seat 24 and the second bearing seat 27 improve the support rigidity of the connecting shaft 23 and the transmission shaft 25, ensuring stability during long-term reciprocating operation. The rack 13 can be mounted to the lower end of the frame 14 via bolts, welding, or a clamping structure. If necessary, an elongated hole can be provided to adjust the meshing clearance between the rack 13 and the first gear 12. The first gear 12, the second gear 20, and the third gear 26 are spur gears, and protective covers are provided as needed to reduce the entry of adhesive mist and dust into the meshing surface.

[0048] In another implementation, the air vent at the lower end of the hood 31 can be designed as a long strip, with the length of the strip aligned with the width of the board, thus allowing the pre-drying airflow to cover a wider area. The partition 33 can divide the long strip vent into two parallel strip vents, namely the first vent 34 and the second vent 35. When the fan blade 30 rotates clockwise, one strip vent discharges air while the other receives air; when the fan blade 30 rotates counterclockwise, the airflow directions are reversed. This creates alternating airflow on the board surface, which is beneficial for moisture removal and avoids causing localized, continuous strong blowing.

[0049] In this application, the linear guide reciprocating mechanism 1, the pressure pump 16, the heating head 7, the nozzle 9, etc., can all be conventional components in the art. Parts not shown in detail in the figures, such as the feeding equipment, conveyor rollers, and subsequent drying tunnels, can be set according to the actual needs of the metal composite insulation board production line. The glue-applying machine can be used independently or integrated into a continuous metal composite insulation board production line. For metal composite insulation boards of different specifications, the reciprocating stroke of the nozzle 9, the conveying speed, the glue supply pressure, and the pre-drying air volume can be adjusted to suit different requirements. Since the lifting of the heating head 7 and the operation of the air supply mechanism 15 both originate from the reciprocating motion of the slider 2, there is less likely to be a significant lag between the heating and pre-drying actions and the glue-applying actions during startup, shutdown, and reversal, resulting in good overall coordination.

[0050] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A glue-applying machine for the production of metal composite insulation boards, comprising a linear guide reciprocating mechanism, characterized in that, The linear guide reciprocating mechanism has a mounting base on its slider, and the mounting base has a first platform and a second platform arranged sequentially from top to bottom. The upper end of the second platform is equipped with a box and a heating head that can move up and down is installed inside the box. The upper end of the heating head is connected to a lifting mechanism that can drive the heating head to move up and down and is located on the first platform. The lower end of the second platform is equipped with a nozzle, which is connected to the housing via a connecting pipe so that the adhesive material inside the housing can be delivered to the nozzle. A transmission mechanism is also provided below the mounting base. One end of the transmission mechanism is connected to the lifting mechanism, and the other end of the transmission mechanism is connected to a first gear. The first gear is connected to a rack, and the rack is installed at the lower end of the frame in the linear guide reciprocating mechanism. The transmission mechanism is also equipped with an air supply mechanism, so that when the transmission mechanism rotates, it can simultaneously drive the air supply mechanism and the lifting mechanism to operate, and respectively realize the lifting and lowering of the heating head and the blowing of air onto the metal composite insulation board after the glue has been applied for pre-drying.

2. The glue-applying machine for the production of metal composite insulation boards according to claim 1, characterized in that, A pressure pump is also installed between the nozzle and the housing.

3. The glue-applying machine for the production of metal composite insulation boards according to claim 1, characterized in that, The heating head is slidably connected to the housing, and a connecting rod is fixed to the upper end of the heating head. The upper end of the connecting rod is connected to the lifting mechanism.

4. A glue-applying machine for the production of metal composite insulation boards according to claim 3, characterized in that, The lifting mechanism includes a rectangular tube, a cam, and a second gear. The lower end of the rectangular tube is connected to a connecting rod and is also equipped with two symmetrically arranged guide columns. The lower ends of the guide columns pass through the first platform and are connected to limit nuts. The cam is located inside a rectangular tube and is connected to a second gear via a connecting shaft.

5. A glue-applying machine for the production of metal composite insulation boards according to claim 4, characterized in that, One end of the connecting shaft located on the second gear is rotatably connected to the mounting base by means of a bearing; A first bearing housing is also installed between the second gear and the cam, and the connecting shaft is rotatably connected to the first bearing housing through the bearing.

6. A glue-applying machine for the production of metal composite insulation boards according to claim 4, characterized in that, The transmission mechanism includes a transmission shaft and a third gear. The third gear is located below the second gear and meshes with the second gear. One end of the transmission shaft passes through the mounting base and is connected to the second gear. The other end of the drive shaft is connected to the first gear; The air supply mechanism is mounted on the drive shaft.

7. A glue-applying machine for the production of metal composite insulation boards according to claim 6, characterized in that, The drive shaft is rotatably connected to the mounting base by means of a bearing; A second bearing housing is also installed between the air supply mechanism and the first gear, and the transmission shaft is rotatably connected to the second bearing housing by means of the bearing; The mounting base and the slider are also connected by a connecting base, and the upper end of the second bearing seat is installed on the lower end of the connecting base.

8. A glue-applying machine for the production of metal composite insulation boards according to claim 6, characterized in that, The air supply mechanism includes a central shaft sleeve and multiple fan blades. The central bearing is mounted and fixed on the transmission shaft, and the multiple fan blades are circumferentially fixed on the central bearing. The outer periphery of the air supply mechanism is also provided with a hood that can cover the air supply mechanism. The hood is installed and fixed to the mounting base by means of a side bracket. The lower end of the hood is provided with an air outlet. A partition parallel to the mounting base is provided at the air outlet and divides the air outlet into a first air outlet and a second air outlet.

9. A glue-applying machine for the production of metal composite insulation boards according to claim 8, characterized in that, The distance between the air vent and the nozzle is at least 40cm.

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