Gluing device for cold storage plate production

Abstract

The invention relates to a gluing device for cold storage plate production, and relates to the technical field of glue spraying equipment. The mounting frame is arranged on the conveying base, and a gluing mechanism is arranged on the mounting frame; the gluing mechanism comprises a dispersing disc and a glue supply assembly, the dispersing disc is horizontally arranged and located above the conveying base, the dispersing disc is coaxially connected with a dispersing motor, the glue supply assembly and the dispersing motor are both arranged on the mounting frame, and the glue supply assembly is located above the dispersing disc; the constant-temperature mechanism is arranged on the mounting frame, right faces the dispersion disc and is used for adjusting the temperature on the dispersion disc; and the uniform smearing mechanism is arranged on the conveying base, the uniform smearing mechanism and the gluing mechanism are sequentially arranged in the conveying direction of the conveying base, and the uniform smearing mechanism is used for uniformly smearing glue on the cold storage plate. According to the gluing device, the possibility of shutdown of the gluing device due to faults of the gluing mechanism can be reduced, so that the overall working efficiency of the gluing device is improved.

Description

Technical Field

[0001] This application relates to the technical field of adhesive spraying equipment, and in particular to an adhesive coating device for cold storage panel production. Background Technology

[0002] Cold storage panels, as a key insulation material in the construction of refrigeration and freezing facilities, directly affect the insulation performance and energy efficiency of cold storage facilities due to their production quality. During the manufacturing process of cold storage panels, a layer of insulation core material (such as polyurethane foam) is typically laminated onto the panel to ensure its insulation performance. One of the key steps in this process is to uniformly coat the surface of the cold storage panel with an adhesive, such as a polyurethane blend adhesive, to ensure a strong bond between the panel and the subsequent insulation core material. Therefore, the performance of the adhesive coating equipment, especially the uniformity and continuity of the coating, is crucial to the final product quality of the cold storage panels.

[0003] Currently, in automated production lines for cold storage panels, most existing adhesive coating devices use nozzles to spray adhesive. Specifically, the mixed liquid adhesive is pressurized and sprayed onto the surface of a moving cold storage panel through one or more precision nozzles. Ideally, this method can achieve adhesive coating.

[0004] Regarding the aforementioned technologies, since the adhesive used in the production of cold storage panels usually has a certain viscosity and is easy to solidify in the air, when the adhesive coating device is used continuously for a long time, the adhesive is prone to solidify at the nozzle outlet of the adhesive coating device and cause blockage. Once the adhesive blocks the nozzle, it will not only destroy the uniformity of the adhesive coating, but also force the entire production line to be stopped to clean or replace the nozzle, which will seriously reduce the overall working efficiency of the adhesive coating device. Summary of the Invention

[0005] This application provides a gluing device for cold storage panel production, the purpose of which is to reduce the possibility of gluing device downtime, thereby improving the overall working efficiency of the gluing device.

[0006] The adhesive coating device for cold storage panel production provided in this application adopts the following technical solution: A glue-applying device for cold storage panel production includes a conveying base for conveying cold storage panels along its length; a mounting frame disposed on the conveying base, on which a glue-applying mechanism is mounted; the glue-applying mechanism includes a dispersing disc and a glue supply assembly, the dispersing disc being horizontally positioned above the conveying base and coaxially connected to a dispersing motor, the glue supply assembly and the dispersing motor being both mounted on the mounting frame, the glue supply assembly being positioned above the dispersing disc and used to deliver glue to the upper side of the dispersing disc; a temperature control mechanism disposed on the mounting frame, facing the dispersing disc, and used to regulate the temperature on the dispersing disc; and a spreading mechanism disposed on the conveying base, the spreading mechanism and the glue-applying mechanism being arranged sequentially along the conveying direction of the conveying base, the spreading mechanism being used to spread the glue evenly on the cold storage panels.

[0007] By adopting the above technical solution, during the adhesive coating process of cold storage panels, the panels pass sequentially under the adhesive coating mechanism and the spreading mechanism under the action of the conveying base. The adhesive coating mechanism sprays adhesive onto the cold storage panels, and the spreading mechanism spreads the adhesive evenly on the panels. This achieves the basic function of the adhesive coating device. Furthermore, the adhesive coating mechanism employs a design with a dispersing disc and a dispersing motor. The adhesive supply component delivers the adhesive to the dispersing disc, which rotates at high speed and uses centrifugal force to throw the adhesive out. This centrifugal adhesive coating is an open coating method, avoiding nozzle clogging caused by adhesive curing and ensuring the continuity of the adhesive coating operation.

[0008] However, the viscosity of the adhesive changes drastically in real time due to the influence of ambient temperature and the exothermic reaction of the adhesive itself. This is one of the reasons for uneven centrifugal coating. At this time, the setting of the constant temperature mechanism can adjust the temperature of the dispersion plate, thereby performing non-contact temperature control on the adhesive on the dispersion plate, thus ensuring that the adhesive that is spun out always has constant fluid characteristics.

[0009] Therefore, with the cooperation of the gluing mechanism and the constant temperature mechanism, the possibility of the gluing device stopping due to the failure of the gluing mechanism can be reduced, and the uniformity and consistency of the gluing on the cold storage panels can be improved, thereby improving the gluing efficiency of the gluing device and the production quality of the cold storage panels.

[0010] Optionally, the temperature control mechanism includes a temperature control plate, in which a cooling element and a heating element are disposed. The temperature control plate is connected to the mounting bracket and is positioned directly above the dispersion plate. The temperature control plate and the dispersion plate are spaced apart to form a dispensing gap. The temperature control mechanism also includes a temperature controller. Several temperature sensors are disposed on both the temperature control plate and the dispersion plate. The temperature sensors, the cooling element, and the heating element are all electrically connected to the temperature controller.

[0011] By adopting the above technical solution, the temperature control mechanism incorporates a cooling and heating element within the temperature control plate through its structural design. Temperature sensors are also installed on both the temperature control plate and the dispersion plate, and all components, including the cooling and heating elements and temperature sensors, are electrically connected to the temperature controller. The temperature controller activates the cooling or heating element in real time based on temperature sensor feedback, thereby achieving closed-loop control of the temperature of the temperature control plate and the dispersion plate. This, in turn, regulates the constant temperature atmosphere within the dispensing gap between the temperature control plate and the dispersion plate, ensuring a constant ambient temperature for the adhesive and reducing the possibility of adhesive curing.

[0012] Furthermore, the immense shear force between the high-speed rotating dispersion disc and the stationary constant-temperature disc causes shear thinning of the adhesive, resulting in an instantaneous decrease in the viscosity of the ejected adhesive. This transforms the adhesive from a high-viscosity state to a low-viscosity liquefied state, reducing the resistance to the adhesive flowing through the dispensing gap and eliminating the stringing and uneven flow phenomena that are prone to occur in high-viscosity fluids under high shear. This ensures that the adhesive ejected from the dispensing gap is no longer in the form of random droplets or adhesive threads, but rather a uniform and continuous atomized curtain, which improves the uniformity of adhesive spraying on cold storage panels.

[0013] Optionally, the glue application mechanism further includes a glue supply controller. Several glue supply components are provided, and each glue supply component is electrically connected to the glue supply controller. The glue supply controller is used to switch different glue supply components to deliver glue to the upper side of the dispersion disc.

[0014] By adopting the above technical solution, and based on the coordinated operation of several glue supply components and the glue supply controller, when a working glue supply component becomes clogged or requires maintenance, the glue supply controller can switch to another glue supply component to continue working. This design ensures the continuity of the glue application device's operation and shortens downtime caused by glue supply component failures.

[0015] Optionally, the glue supply assembly includes a mixer, a glue inlet pipe, and a glue supply component. The mixer, the glue inlet pipe, and the glue supply component are connected in sequence. The mixer is disposed on the mounting frame and is located above the dispersion disc. The glue outlet of the mixer faces the dispersion disc. A mounting hole is provided through the constant temperature disc, and the mixer is inserted into the mounting hole.

[0016] By adopting the above technical solution, firstly, the glue supply assembly, through the design of the mixer, glue inlet pipe, and glue supply component, enables the glue supply component to pump glue into the glue inlet pipe. The glue is then transported along the glue inlet pipe to the mixer, and finally, the mixer mixes the glue and flows it out from the glue outlet onto the dispersion disc, thus meeting the requirements of the glue supply assembly. Furthermore, by creating mounting holes in the thermostatic disc, the mixer of the glue supply assembly passes through the stationary thermostatic disc, preventing interference from the thermostatic disc on the mixer. Simultaneously, while regulating the temperature of the dispersion disc, the thermostatic disc also regulates the temperature of the mixer installed in the mounting holes, ensuring the mixer remains at a constant temperature. This reduces the possibility of glue curing at the mixer's outlet, thereby extending the mixer's service life.

[0017] Optionally, a first anti-stick film is attached to the upper side of the dispersion plate, and a second anti-stick film is attached to the lower side of the constant temperature plate.

[0018] By adopting the above technical solution, the first and second anti-stick films prevent the adhesive from adhering, thereby reducing the possibility of the adhesive solidifying on the dispersion plate and the constant temperature plate, and thus extending the service life of the dispersion plate and the constant temperature plate.

[0019] Optionally, an overflow groove is provided on the upper side of the dispersing disc, the overflow groove is coaxially arranged with the dispersing disc, and the glue supply component is used to deliver glue into the overflow groove.

[0020] By adopting the above technical solution, based on the opening of the overflow ring groove, when the glue supply component sends the glue into the overflow ring groove, under the action of centrifugal force, the glue cannot be directly thrown out, but is first forced to spread out in the overflow ring groove, so that the glue entering the overflow ring groove will become a continuous ring of glue with a consistent liquid level. This makes the glue evenly distributed on the dispersion plate, and thus makes the glue droplets thrown out around the dispersion plate evenly distributed, which can improve the uniformity of the glue sprayed on the cold storage panel.

[0021] Optionally, the outer wall of the overflow groove is provided with an arc-shaped transition surface.

[0022] By adopting the above technical solution, based on the setting of the arc transition surface, the glue will not hit the outside of the glue overflow groove under the action of centrifugal force. Instead, it will be guided by the arc transition surface and smoothly climb up along this arc transition surface. During the climbing process, the glue is forced to flatten and pre-form a ring-shaped liquid film of uniform thickness, thereby ensuring that the final glue ejected is a uniform atomized curtain rather than random droplets. This can improve the uniformity of glue spraying on cold storage panels.

[0023] Optionally, the mounting bracket is detachably connected to the conveyor base.

[0024] By adopting the above technical solution, and by making the mounting frame detachably connected to the conveyor base, when the gluing mechanism or the constant temperature mechanism requires deep maintenance or cleaning, the operator does not need to work on the narrow production line. Instead, the entire mounting frame can be hoisted and moved to a dedicated maintenance area, thereby shortening maintenance downtime and improving maintenance conditions.

[0025] Optionally, two mounting brackets are provided, each of which is equipped with an adhesive application mechanism and a temperature control mechanism. The two mounting brackets are arranged sequentially along the length of the conveying base. A displacement drive assembly is provided on the conveying base, and both mounting brackets are detachably connected to the displacement drive assembly. The displacement drive assembly is used to drive the two mounting brackets to move along the length of the conveying base.

[0026] By adopting the above technical solution, and by setting up two mounting brackets and a displacement drive assembly, one mounting bracket is positioned in the working position, where the glue application mechanism and temperature control mechanism on this bracket operate normally, performing glue spraying. The other mounting bracket is in a standby position and is not in operation. When the mounting bracket in the working position requires maintenance, the displacement drive assembly drives both mounting brackets to move synchronously. At this time, the mounting bracket in the working position is removed, and the mounting bracket in the standby position automatically moves into the working position, at which point the standby mounting bracket takes over the glue application work. This prevents the glue application device from shutting down due to glue application mechanism failure, thereby further improving the overall glue application efficiency.

[0027] Optionally, the spreading mechanism includes a spreading plate, which is horizontally arranged and located above the conveying base. The length direction of the spreading plate is perpendicular to the length direction of the conveying base, and a contact membrane is provided below the spreading plate. The conveying base is also provided with a spreading drive, which is connected to the spreading plate and is used to drive the spreading plate to reciprocate along its own length direction.

[0028] By adopting the above technical solution, the smearing mechanism, through the coordinated design of the smearing plate and the smearing drive, allows the smearing plate to reciprocate on the cold storage panel under the action of the smearing drive, thereby smearing the glue sprayed on the cold storage panel by the glue applicator. This improves the flatness of the glue layer on the cold storage panel and thus improves the glue application quality on the cold storage panel.

[0029] In summary, this application includes at least one of the following beneficial technical effects: 1. This application utilizes the design of a dispersing disc, which rotates at high speed and uses centrifugal force to throw out the adhesive. This centrifugal coating method is an open coating method, thereby avoiding the nozzle clogging problem caused by adhesive curing in the prior art and ensuring the continuity of the coating operation.

[0030] 2. This application, through the design of a constant temperature mechanism, can actively regulate the viscosity of the adhesive on the dispersion disc, prevent the adhesive from curing on the dispersion disc, and extend the service life of the dispersion disc. This ensures the continuity of the adhesive coating device's operation and thus improves the overall working efficiency of the adhesive coating device.

[0031] 3. This application, through the replacement of the drive assembly and the cooperative design of the two mounting brackets, enables the glue application mechanism on the spare mounting bracket to replace the malfunctioning glue application mechanism on the other mounting bracket. This prevents the glue application device from shutting down due to glue application mechanism failure, thereby further improving the overall glue application efficiency.

[0032] 4. This application creates a dispensing gap between the constant temperature plate and the dispersion plate. Utilizing the enormous shear force between the high-speed rotating dispersion plate and the stationary constant temperature plate, the adhesive within the dispensing gap undergoes shear thinning, resulting in an instantaneous decrease in the viscosity of the ejected adhesive. This transforms the adhesive from a high-viscosity state to a low-viscosity liquefied state, reducing the resistance to the adhesive flowing through the dispensing gap and eliminating the stringing and uneven flow phenomena that easily occur in high-viscosity fluids under high shear. This ensures that the adhesive ejected from the dispensing gap is no longer in the form of random droplets or adhesive threads, but rather a uniform and continuous atomized curtain, thereby improving the uniformity of adhesive spraying on cold storage panels. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the adhesive application device of this application.

[0034] Figure 2 This is a side view of the adhesive applicator of this application.

[0035] Figure 3 This is a schematic diagram of the overall structure of the mounting bracket, adhesive application mechanism, and temperature control mechanism of this application.

[0036] Figure 4 This is a partial structural diagram of the adhesive application mechanism and the temperature control mechanism of this application.

[0037] Figure 5 This is a partial cross-sectional structural diagram of the adhesive application mechanism and the temperature control mechanism of this application.

[0038] Figure 6 This is a partial structural schematic diagram of the adhesive application device of this application.

[0039] Figure 7 This is a schematic diagram of the overall structure of the spreading mechanism of this application.

[0040] In the diagram, 1. Conveying base; 11. Replacement drive assembly; 2. Mounting bracket; 3. Glue application mechanism; 31. Dispersing disc; 311. Glue overflow groove; 312. Arc-shaped transition surface; 32. Dispersing motor; 33. Glue supply assembly; 331. Mixer; 332. Glue inlet pipe; 333. Glue supply component; 34. Extension shaft; 35. Quick-release assembly; 351. Insert post; 352. Insertion hole; 353. First hole; 354. Second hole; 355. Locking bolt; 4. Temperature control mechanism; 41. Temperature control disc. ; 411, clearance hole; 412, mounting hole; 42, adjustable mounting assembly; 421, extension connector; 422, adjustable seat; 423, fine-tuning drive; 5, glue dispensing gap; 6, spreading mechanism; 61, spreading plate; 62, contact film; 63, spreading drive; 64, mounting truss; 65, fixing frame; 66, automatic film changing assembly; 661, roller frame; 662, drive roller; 663, driven roller; 664, driven motor; 665, unloading film roll; 666, rewinding film roll. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1 - Appendix Figure 7 This application will be described in further detail below.

[0042] A gluing device for cold storage panel production, as described in the following figure. Figure 1 and Figure 2 It includes a conveying base 1, a mounting frame 2, an adhesive application mechanism 3, a constant temperature mechanism 4, and a spreading mechanism 6. The mounting frame 2 is set on the conveying base 1. The adhesive application mechanism 3 and the constant temperature mechanism 4 are both set on the mounting frame 2. The spreading mechanism 6 is set on the conveying base 1, and the spreading mechanism 6 and the adhesive application mechanism 3 are arranged sequentially along the conveying direction of the conveying base 1.

[0043] During the adhesive application process for cold storage panels, the panels pass sequentially under the adhesive application mechanism 3 and the spreading mechanism 6, driven by the conveyor base 1. The adhesive application mechanism 3 sprays adhesive onto the cold storage panels, while the spreading mechanism 6 spreads the adhesive evenly across the panels. This achieves the basic function of the adhesive application device.

[0044] Reference Figure 1 In this embodiment, the conveying base 1 is a roller conveyor. In another embodiment, the conveying base 1 can also be a belt conveyor.

[0045] Reference Figure 1 and Figure 2The conveying base 1 has displacement drive assemblies 11 on both sides along its width direction, and each displacement drive assembly 11 is detachably connected to the mounting frame 2. Two mounting frames 2 are provided, arranged sequentially along the length of the conveying base 1, and each mounting frame 2 is equipped with a gluing mechanism 3 and a temperature control mechanism 4. Both mounting frames 2 are detachably connected to the displacement drive assembly 11. In this embodiment, the displacement drive assembly 11 is a servo motor-driven belt linear module; the mounting frame 2 is connected to the slide on the displacement drive assembly 11 by bolts. In another embodiment, the displacement drive assembly 11 can also be a precision ball screw slide or a gear and rack mechanism.

[0046] With the cooperation of the replacement drive assembly 11 and the two mounting brackets 2, when the mounting bracket 2 in the working position needs maintenance, the replacement drive assembly 11 is activated, driving the two mounting brackets 2 to move synchronously, so that the mounting bracket 2 in the working position moves out, and the other spare mounting bracket 2 moves into the working position to continue the glue spraying, which enables the production line to operate continuously.

[0047] Reference Figure 2 and Figure 3 The glue application mechanism 3 includes a dispersing disc 31, a dispersing motor 32, and a glue supply assembly 33. The dispersing disc 31 is horizontally positioned above the conveying base 1. The dispersing motor 32 is mounted on the mounting frame 2, with its axis aligned vertically. The dispersing motor 32 is located above the dispersing disc 31, and its drive end is coaxially connected to the dispersing disc 31. The glue supply assembly 33 is mounted on the mounting frame 2, and its glue outlet is located directly above the dispersing disc 31. The dispersing motor 32 is specifically a servo motor or a frequency converter motor.

[0048] Under the structural design of the glue coating mechanism 3, the glue supply component 33 delivers the glue to the upper side of the dispersing disc 31, and the dispersing motor 32 drives the dispersing disc 31 to rotate at high speed, using centrifugal force to evenly throw out the glue, so that the glue is sprayed onto the cold storage plate below.

[0049] Reference Figure 4 and Figure 5 An overflow groove 311 is provided on the upper side of the dispersing disk 31. The overflow groove 311 is coaxially arranged with the dispersing disk 31. An arc-shaped transition surface 312 is provided on the outer wall of the overflow groove 311. The side of the arc-shaped transition surface 312 facing the center of the dispersing disk 31 is flush with the bottom of the overflow groove 311, and the other side rises in a smooth arc.

[0050] Based on the design of the overflow ring groove 311 on the dispersing disc 31, when the glue falls into the overflow ring groove, the overflow ring groove 311 first plays the role of accumulation and buffering. Under the action of centrifugal force, the point-like material from the glue supply component 33 is forced to spread circumferentially within the overflow ring groove 311, thereby homogenizing the discontinuous material supply into a continuous and uniformly leveled annular liquid flow. On this basis, this pre-homogenized annular liquid flow is then guided and smoothly climbs along the arc-shaped transition surface 312. During this climbing process, the glue is further forced to flatten, so that when the glue climbs on the arc-shaped transition surface 312 to the dispersing disc 31, it can form an annular liquid film of uniform thickness. This liquid film is then thrown out of the dispersing disc 31 by centrifugal force, ensuring that the glue thrown out from the periphery of the dispersing disc 31 is a uniform and continuous atomized curtain, rather than random droplets or glue threads.

[0051] Reference Figure 5 In this embodiment, a first anti-stick film is affixed to the dispersion disc 31. The first anti-stick film is completely adhered to the upper sidewall of the dispersion disc 31 and covers the inner wall of the overflow groove 311. The first anti-stick film is made of FEP (fluorinated ethylene propylene) film or PFA (fusible polytetrafluoroethylene) film, which is resistant to high temperatures and has excellent chemical inertness. The dispersion disc 31 is made of aluminum alloy or high-strength stainless steel, which has good thermal conductivity and is lightweight. The first anti-stick film makes it difficult for polyurethane mixed adhesive to adhere to or cure on the dispersion disc 31, thereby simplifying the cleaning and maintenance of the dispersion disc 31 and extending its service life.

[0052] Reference Figure 4 and Figure 5 An extension shaft 34 is provided between the dispersing disc 31 and the dispersing motor 32. The extension shaft 34 is vertically arranged, and one end of the extension shaft 34 is coaxially connected to the drive end of the dispersing motor 32, while the other end is coaxially and detachably connected to the dispersing disc 31.

[0053] Reference Figure 5 In this embodiment, a quick-release assembly 35 is provided between the extension shaft 34 and the dispersing disk 31. The quick-release assembly 35 includes a pin 351, which is coaxially and fixedly connected to the dispersing disk 31. The lower end of the extension shaft 34 has a insertion hole 352, and the pin 351 and the insertion hole 352 are coaxially inserted into each other. A first hole 353 is provided through the extension shaft 34, and a second hole 354 is provided through the pin 351. The first hole 353 and the second hole 354 are coaxially connected. A locking bolt 355 is inserted into the first hole 353, and the locking bolt 355 and the second hole 354 are coaxially inserted into each other.

[0054] Thanks to the quick-release component 35, when the dispersing disc 31 needs to be cleaned or replaced, the operator only needs to pull out the locking bolt 355 to quickly remove the dispersing disc 31, which improves the convenience of cleaning and replacing the dispersing disc 31.

[0055] Reference Figure 3 and Figure 4 The glue supply assembly 33 includes a mixer 331, a glue inlet pipe 332, and a glue supply component 333. The mixer 331 is located directly above the dispersion disc 31, and the glue outlet at the lower end of the mixer 331 faces the overflow ring groove 311. The upper end of the mixer 331 is connected to two glue inlet pipes 332, with one end of each pipe connected to the mixer 331 and the other end connected to the glue supply component 333. The glue supply component 333 is mounted on the mounting bracket 2. In this embodiment, the glue supply component 333 uses a gear pump in conjunction with a glue storage cylinder or a screw pump in conjunction with a glue storage cylinder; the mixer 331 uses a static mixing pipe or a dynamic mixing pipe.

[0056] The glue supply assembly 33 is designed with the mixer 331, the glue inlet pipe 332 and the glue supply component 333 working together. The glue supply component 333 is used to extract two kinds of glue raw materials from the barrel according to a preset ratio. The two kinds of glue raw materials are transported to the mixer 331 through the corresponding glue inlet pipe 332 for thorough mixing. The mixed glue is then transported to the dispersing plate 31, which satisfies the function of the glue supply assembly 33.

[0057] Reference Figure 3 and Figure 4 In this embodiment, several glue supply components 33 are provided, and several glue mixers 331 are arranged evenly and sequentially along the circumference of the dispersing disk 31. The glue coating mechanism 3 also includes a glue supply control component, which includes a glue supply controller and several pressure gauges. Each pressure gauge is correspondingly arranged with a glue inlet pipe 332, and the pressure gauge is installed on the corresponding glue inlet pipe 332. The pressure gauges and the glue supply components 333 are electrically connected to the glue supply controller. In this embodiment, the pressure gauges are diaphragm pressure sensors or piezoresistive pressure sensors; the glue supply controller is a PLC.

[0058] With the cooperation of multiple mixers 331 and glue supply control components, the glue supply controller can detect whether the corresponding mixer 331 is blocked by reading the real-time data of the pressure gauge on each glue inlet pipe 332. This allows the glue supply controller to switch to another glue supply component 333 and the corresponding mixer 331 in a timely manner, so that the glue supply can be kept continuous and the possibility of the glue application mechanism 3 stopping can be reduced.

[0059] Reference Figure 3 and Figure 4The temperature control mechanism 4 includes a temperature control plate 41 and a temperature control controller. The temperature control plate 41 is connected to the mounting bracket 2 and is located directly above the dispersion plate 31. The temperature control plate 41 and the dispersion plate 31 are vertically spaced apart, forming a glue dispensing gap 5 between them. The width of the glue dispensing gap 5 is preferably 0.05mm-2mm. The temperature control plate 41 is embedded with a cooling element and a heating element. Several temperature sensors are installed on both the temperature control plate 41 and the dispersion plate 31. The temperature sensors, cooling element, and heating element are all electrically connected to the temperature control controller. In this embodiment, the cooling element can be a semiconductor cooling chip, and the heating element can be an electric heating wire. In another embodiment, both the cooling element and the heating element can be heat exchange pipes through which cooling / heating media flow. The temperature control plate 41 is preferably made of aluminum alloy or copper, which has good thermal conductivity. The temperature control controller can be a PLC.

[0060] Based on the design of the constant temperature mechanism 4, the constant temperature controller can control the cooling and heating components to work together to achieve constant temperature control of the adhesive by using temperature data collected in real time by the temperature sensor and through methods such as PID algorithm. For example, when the temperature sensor detects that the adhesive temperature is too high, the cooling component is activated; when the ambient temperature is too low and the adhesive viscosity is too high, the heating component is activated to keep the adhesive at the optimal process viscosity.

[0061] Reference Figure 4 In this embodiment, a second anti-stick film is attached to the lower side of the constant temperature plate 41. The first anti-stick film and the second anti-stick film are made of the same material.

[0062] Reference Figure 4 In this embodiment, a clearance hole 411 is provided through the constant temperature plate 41, and the extension shaft 34 is coaxially inserted into the clearance hole 411, with the extension shaft 34 and the inner wall of the clearance hole 411 spaced apart. The constant temperature plate 41 is also provided with a plurality of mounting holes 412, each corresponding to a mixer 331, and the mixer 331 is inserted into the mounting hole 412.

[0063] Reference Figure 4 In this embodiment, an adjustable mounting assembly 42 is provided between the constant temperature plate 41 and the mounting bracket 2. The adjustable mounting assembly 42 includes an extension connecting seat 421 and an adjustable seat 422. The adjustable seat 422 is fixedly connected to the constant temperature plate 41. The extension connecting seat 421 is vertically arranged, with its upper end connected to the mounting bracket 2 and its lower end facing the adjustable seat 422. A fine-tuning drive component 423 is provided on the extension connecting seat 421, and the driving end of the fine-tuning drive component 423 is connected to the adjustable seat 422. The driving direction of the fine-tuning drive component 423 is vertical. The fine-tuning drive component 423 is an electric linear actuator or a linear motor.

[0064] With the cooperation of the adjustable mounting component 42, the position of the constant temperature plate 41 in the vertical direction can be adjusted by the fine-tuning drive component 423, thereby realizing the distance of the glue dispensing gap 5 between the constant temperature plate 41 and the dispersing plate 31.

[0065] Reference Figure 6 and Figure 7 The smoothing mechanism 6 includes a smoothing plate 61, which is horizontally arranged and its length direction is perpendicular to the length direction of the conveying base 1. A contact membrane 62 is provided below the smoothing plate 61. A smoothing drive 63 is also provided on the conveying base 1, and the smoothing drive 63 is connected to the smoothing plate 61. In this embodiment, the smoothing drive 63 is specifically a servo motor in conjunction with an eccentric wheel or a linear motor.

[0066] With the design of the spreading mechanism 6, when the cold storage panel coated with glue passes under the spreading mechanism 6, the spreading drive 63 drives the spreading plate 61 and the contact film 62 to reciprocate, thereby spreading the glue on the cold storage panel.

[0067] Reference Figure 6 and Figure 7 The smoothing mechanism 6 also includes a mounting truss 64, which is mounted on the conveying base 1 and its length is along the width of the conveying base 1. Both ends of the mounting truss 64 are connected to the conveying base 1. A fixing frame 65 is slidably mounted on the mounting truss 64. A smoothing plate 61 is located below the fixing frame 65 and is connected to the fixing frame 65. A smoothing drive 63 is mounted on the mounting truss 64 and its drive end is connected to the fixing frame 65.

[0068] The mounting truss 64 provides rigid support across the conveyor base 1, and the fixing frame 65 is slidably connected on the mounting truss 64. The cooperative design of the mounting truss 64 and the fixing frame 65 ensures the stability of the spreading plate 61 in high-speed reciprocating motion and avoids uneven spreading caused by vibration.

[0069] Reference Figure 6 and Figure 7An automatic film changing assembly 66 is also provided on the fixed frame 65. The automatic film changing assembly 66 includes a roller frame 661, which is mounted on the fixed frame 65. A drive roller 662 and a driven roller 663 are rotatably mounted on the roller frame 661. Both the drive roller 662 and the driven roller 663 are horizontally positioned and axially aligned along the width direction of the conveying base 1. The drive roller 662 and the driven roller 663 are spaced apart along the conveying direction of the conveying base 1. Both the drive roller 662 and the driven roller 663 are located above the spreading plate 61, which is positioned between the drive roller 662 and the driven roller 663 along the conveying direction of the conveying base 1. A driven motor 664 is mounted on the roller frame 661 and is coaxially connected to the driven roller 663.

[0070] Reference Figure 7 The contact film 62 is arranged along the conveying direction of the conveying base 1 in the length direction, and one end of the contact film 62 extends along its own length direction to be wound around the drive roller 662 to form a feeding film roll 665, and the other end extends to be wound around the driven roller 663 to form a receiving film roll 666.

[0071] With the automatic film changing assembly 66, when it is necessary to replace the contact film 62 below the spreading plate 61, the driven motor 664 is started, which causes the driven roller 663 to wind up the used contact film 62, while the driving roller 662 unwinds the new contact film 62, thereby moving a brand new contact film 62 to the working position below the spreading plate 61, realizing the automatic and rapid replacement of the contact film 62.

[0072] The implementation principle of this application embodiment is as follows: During the adhesive application process for the cold storage panel, the panel moves forward at a constant speed on the conveyor base 1. When the panel reaches the adhesive application mechanism 3, the mechanism sprays adhesive onto the panel. Afterward, the panel is conveyed to the spreading mechanism 6, which spreads the adhesive evenly on the panel. Finally, the panel is continued to be conveyed by the conveyor base 1 to subsequent stages.

[0073] When the cold storage panel is at the glue application mechanism 3, the glue supply component 33 is activated. The glue supply component 333 pumps out the two types of glue, which flow through the glue inlet pipe 332 and finally into the glue mixer 331 for thorough mixing to form the required polyurethane mixed glue. The glue mixer 331 drips the mixed glue into the overflow ring groove 311 on the dispersion disc 31. At this time, the dispersion motor 32 drives the dispersion disc 31 to rotate at high speed. Under the action of centrifugal force, the glue is guided and climbs up the arc-shaped transition surface 312 of the overflow ring groove 311. During this process, the glue is forced to flatten, thereby forming a uniform annular liquid film on the arc-shaped transition surface 312. This liquid film is then thrown out of the dispersion disc 31 by centrifugal force, so that the glue thrown out from the periphery of the dispersion disc 31 is evenly distributed.

[0074] During this process, the constant temperature mechanism 4 works continuously. On the one hand, the constant temperature controller controls the cooling or heating components in the constant temperature plate 41 to work based on the data fed back by the temperature sensor, so that the constant temperature plate 41 is kept at the preset process temperature, thereby establishing a constant temperature atmosphere between the constant temperature plate 41 and the dispersion plate 31, thereby reducing the possibility of the adhesive curing on the dispersion plate 31 and extending the service life of the dispersion plate 31. At the same time, the constant temperature plate 41 can also keep several mixers 331 in a constant temperature state, which can reduce the possibility of the adhesive curing at the outlet of the mixer 331 and extend the service life of the mixer 331.

[0075] On the other hand, since a tiny glue dispensing gap 5 is formed between the constant temperature plate 41 and the dispersing plate 31, when the glue rises from the arc-shaped transition surface 312 into the glue dispensing gap 5 between the constant temperature plate 41 and the dispersing plate 31, the glue is subjected to mechanical shear force generated between the high-speed rotating dispersing plate 31 and the stationary constant temperature plate 41, which causes the glue viscosity to decrease instantaneously (shear thinning). This causes the glue to change from a high viscosity state to a low viscosity liquefied state, which greatly reduces the resistance of the glue flowing through the glue dispensing gap 5 and eliminates the stringing and uneven flow phenomena that are easy to occur in high viscosity fluids under high shear. This ensures that the glue ejected from the glue dispensing gap 5 is no longer a random droplet or glue thread, but a uniform and continuous atomized curtain, which can improve the uniformity of glue spraying on the cold storage panel.

[0076] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gluing device for cold storage panel production, characterized in that, include: Conveying base (1) is used to convey cold storage panels along its own length. Mounting frame (2) is mounted on the conveying base (1), and a glue application mechanism (3) is mounted on the mounting frame (2). The glue application mechanism (3) includes a dispersing disc (31) and a glue supply assembly (33). The dispersing disc (31) is horizontally mounted and located above the conveying base (1). The dispersing disc (31) is coaxially connected to a dispersing motor (32). The glue supply assembly (33) and the dispersing motor (32) are both mounted on the mounting frame (2). The glue supply assembly (33) is located above the dispersing disc (31). The glue supply assembly (33) is used to deliver glue to the upper side of the dispersing disc (31). A constant temperature mechanism (4) is provided on the mounting bracket (2). The constant temperature mechanism (4) is positioned directly opposite the dispersing plate (31). The constant temperature mechanism (4) is used to adjust the temperature on the dispersing plate (31). The spreading mechanism (6) is set on the conveying base (1). The spreading mechanism (6) and the glue application mechanism (3) are arranged in sequence along the conveying direction of the conveying base (1). The spreading mechanism (6) is used to spread the glue on the cold storage plate evenly.

2. The adhesive coating device for cold storage panel production according to claim 1, characterized in that, The constant temperature mechanism (4) includes a constant temperature plate (41), and a cooling component and a heating component are provided inside the constant temperature plate (41). The constant temperature plate (41) is connected to the mounting bracket (2). The constant temperature plate (41) is located directly above the dispersion plate (31). The constant temperature plate (41) and the dispersion plate (31) are spaced apart and form a glue dispensing gap (5). The constant temperature mechanism (4) also includes a constant temperature controller. Several temperature sensors are provided on the constant temperature plate (41) and the dispersion plate (31). The temperature sensors, the cooling component and the heating component are all electrically connected to the constant temperature controller.

3. The adhesive coating device for cold storage panel production according to claim 2, characterized in that, The glue application mechanism (3) also includes a glue supply controller. Several glue supply components (33) are provided. Several glue supply components (33) are electrically connected to the glue supply controller. The glue supply controller is used to switch different glue supply components (33) to deliver glue to the upper side of the dispersion plate (31).

4. The adhesive coating device for cold storage panel production according to claim 3, characterized in that, The glue supply assembly (33) includes a mixer (331), a glue inlet pipe (332), and a glue supply component (333). The mixer (331), the glue inlet pipe (332), and the glue supply component (333) are connected in sequence. The mixer (331) is mounted on the mounting frame (2) and is located above the dispersing disc (31). The glue outlet of the mixer (331) faces the dispersing disc (31). The constant temperature plate (41) has a through hole (412) and the mixer (331) is inserted into the through hole (412).

5. The adhesive coating device for cold storage panel production according to claim 2, characterized in that, The upper side of the dispersion plate (31) is covered with a first anti-stick film, and the lower side of the constant temperature plate (41) is covered with a second anti-stick film.

6. The adhesive coating device for cold storage panel production according to claim 1, characterized in that, An overflow groove (311) is provided on the upper side of the dispersing disc (31). The overflow groove (311) is coaxially arranged with the dispersing disc (31). The glue supply component (33) is used to deliver glue into the overflow groove (311).

7. The adhesive coating device for cold storage panel production according to claim 6, characterized in that, The outer wall of the overflow groove (311) is provided with an arc-shaped transition surface (312).

8. The adhesive coating device for cold storage panel production according to claim 1, characterized in that, The mounting bracket (2) is detachably connected to the conveying base (1).

9. A gluing device for cold storage panel production according to claim 8, characterized in that, There are two mounting brackets (2), and each of the two mounting brackets (2) is provided with a glue application mechanism (3) and a constant temperature mechanism (4). The two mounting brackets (2) are arranged sequentially along the length of the conveying base (1). The conveying base (1) is provided with a displacement drive assembly (11), and the two mounting brackets (2) are detachably connected to the displacement drive assembly (11). The displacement drive assembly (11) is used to drive the two mounting brackets (2) to move along the length direction of the conveying base (1).

10. The adhesive coating device for cold storage panel production according to claim 1, characterized in that, The spreading mechanism (6) includes a spreading plate (61), which is horizontally arranged and located above the conveying base (1). The length direction of the spreading plate (61) is perpendicular to the length direction of the conveying base (1), and a contact film (62) is provided below the spreading plate (61). The conveying base (1) is also provided with a smoothing drive (63), which is connected to the smoothing plate (61). The smoothing drive (63) is used to drive the smoothing plate (61) to reciprocate along its own length direction.

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