A hot air quick control valve

Abstract

The utility model relates to a hot -blast quick control valve relates to the technical field of edge banding machine, installs on the table surface of edge banding machine, including hot -blast pipe row and plugging assembly, the table surface rotatoryly connects with hot -blast pipe row, plugging assembly can act to change the air -out path of hot -blast pipe row, the utility model discloses through the cooperation control of hot -blast pipe row and plugging assembly, realizes hot -blast path quick switching, accurately maintains the adhesive activation temperature in the edge band conveying process, has the advantages such as realizing accurate temperature control through the dynamic regulation hot -blast path, effectively solves the problem of edge banding adhesive secondary heating lag, improves the adhesion strength of edge band and board.

Description

Technical Field

[0001] This utility model relates to the field of edge banding machine technology, and more specifically, to a hot air rapid control valve. Background Technology

[0002] During the edge banding process of boards in winter, after the edge banding strip completes the glue application process through the glue roller assembly of the edge banding machine, due to the objective requirements of the edge banding strip's travel speed, its surface coating continues to undergo heat exchange during the period of exposure to low-temperature ambient air, resulting in a significant drop in the glue layer temperature, which in turn affects the stability and reliability of subsequent bonding processes.

[0003] To address this technical challenge, KONAY Industrial Equipment (Jinan) Co., Ltd. proposed integrating a hot air gun into the main body of the edge banding machine to compensate for heat loss from the adhesive layer through directional airflow. Conventional hot air guns, limited by thermal inertia, require a significant delay in temperature rise during startup due to the need for heating, heat storage, and convection heat transfer, failing to reach the preset temperature instantly. During material changeovers in continuous sheet processing, even after the operator turns off the hot air gun, residual heat stored in the heating element continues to be output through forced convection, resulting in uncontrollable residual heat jetting. This transient thermal shock directly impacts the surface of the laminating wheel, causing irreversible damage such as thermal aging of the rubber material, abnormal increases in hardness, and surface cracking, significantly shortening the service life of the laminating wheel. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art, and to propose a hot air rapid control valve.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A hot air rapid control valve is installed on the table of an edge banding machine, including a hot air duct and a sealing assembly. The hot air duct is rotatably connected to the table, and the sealing assembly can be actuated to change the air outlet path of the hot air duct.

[0007] Furthermore, the bottom of the hot air duct is rotatably connected to the air outlet pipe of the hot air blower, and the hot air blower is fixedly installed inside the edge banding machine.

[0008] Furthermore, the hot air duct includes a pipe body, with an air guide port formed at the top of the pipe body, and a plurality of hot air ducts formed on one side of the pipe body.

[0009] Furthermore, hot air can enter from the bottom of the pipe and be ejected from either the air vent or the hot air duct via a chosen air outlet path.

[0010] Furthermore, the plurality of hot air ducts are arranged linearly along the vertical direction of the duct body.

[0011] Furthermore, an angle adjustment plate is fixedly connected to the tube body, an arc-shaped elongated hole is formed on the angle adjustment plate, and a threaded hole is provided on the platform.

[0012] Furthermore, when the hot air duct is rotated and connected to the tabletop, the bolt passes through the arc-shaped elongated hole of the angle adjustment plate and is threaded into the threaded hole.

[0013] Furthermore, the sealing assembly includes a linear drive component, the execution end of which is connected to a sealing cover, and the linear drive component is capable of driving the sealing cover away from or against the air vent of the hot air exhaust pipe.

[0014] Furthermore, the linear drive component is a pneumatic cylinder or an electric cylinder.

[0015] Furthermore, the sealing assembly also includes a support rod, the top of which is provided with a support plate, and the linear drive component is mounted on the support plate.

[0016] Furthermore, the bottom of the support plate is provided with a fumigation hood, and the sealing cover is located inside the fumigation hood.

[0017] Furthermore, the support plate is provided with several vertical rods, and the top of the multiple vertical rods is provided with mounting plates. The cylinder or electric cylinder is fixedly connected to the mounting plate, and the telescopic rod of the cylinder or electric cylinder passes through the mounting plate and the support plate in sequence and is connected to a sealing cover.

[0018] Compared with the prior art, the beneficial effects of this utility model are: this utility model achieves rapid switching of hot air path through the coordinated control of hot air pipe array and sealing component, accurately maintains the adhesive activation temperature during the edge sealing strip conveying process, and has the advantages of quickly switching the air outlet path to avoid residual heat damaging the bonding wheel and improving the convenience of hot air adjustment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the usage state of this utility model;

[0020] Figure 2 This is a schematic diagram of the hot air duct structure;

[0021] Figure 3 This is a schematic diagram of the structure when the hot air blower is used in conjunction with the work surface.

[0022] Figure 4 This is a schematic diagram of the sealing component.

[0023] The components include: 100 edge banding machine, 101 tabletop, 102 threaded hole, 1 hot air blower, 11 air outlet pipe, 2 hot air pipe array, 21 pipe body, 22 angle adjustment plate, 221 arc-shaped elongated hole, 23 hot air pipe, 31 support rod, 32 support plate, 33 linear drive component, 331 sealing plate, 332 vertical rod, 333 mounting plate, and 34 fume hood. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0025] In existing technologies, during the edge banding process of boards in winter, the adhesive layer temperature drops after the edge banding strip is exposed to the low temperature environment, affecting the bonding stability. Conventional hot air guns have problems with delayed heating and residual heat spraying after shutdown. Residual heat energy causes thermal aging, abnormal hardness, and cracking on the surface of the bonding wheel, shortening the service life of the equipment.

[0026] To address the aforementioned issues, a thermal control device capable of responding instantly to temperature changes and preventing residual heat is needed. Analysis of the impact of thermal inertia on temperature regulation reveals that traditional fixed ducts cannot achieve dynamic airflow distribution. Based on the principle of fluid path switching, an adjustable flow guide structure is considered to replace the integral heating element, directly altering the airflow direction through mechanical action to eliminate heat transfer hysteresis.

[0027] like Figures 1-4 As shown, a hot air rapid control valve is installed on the table 101 of the edge banding machine 100, including a hot air duct 2 and a sealing assembly. The hot air duct is rotatably connected to the table, and the sealing assembly can be activated to change the air outlet path of the hot air duct.

[0028] The hot air duct refers to a tubular structure with multiple air outlet channels. Specifically, it can be a metal tube whose bottom is rotatably connected to the hot air blower's outlet duct, allowing the hot air jet angle to be adjusted by rotation. The sealing assembly refers to a mechanical device containing a linear drive component. Specifically, it can be a cylinder-driven sealing cover structure that closes or opens specific air outlets through vertical lifting and lowering motion.

[0029] Specifically, the bottom of the hot air duct array forms a rotating pair with the outlet duct of the fixed hot air blower, allowing the duct body to rotate around its axis. When the sealing cap of the sealing assembly abuts against the air guide at the top of the duct body, hot air is forced out from the side hot air duct, directly acting on the adhesive layer of the edge sealing strip. When the sealing cap detaches from the air guide, hot air is preferentially discharged from the top, at which point there is no airflow from the side hot air duct. The rotation angle of the hot air duct array can be fixed by the cooperation of bolts and arc-shaped elongated holes, adapting to different board thicknesses and angle requirements.

[0030] Compared to existing technologies, traditional solutions rely on a single heating plate and cannot dynamically adjust the hot air path. This mechanism achieves rapid switching between airflow direction and heating mode through mechanical linkage. The manual operation of hot air guns required in existing technologies is replaced by an integrated structure, eliminating delays and safety hazards caused by manual operation.

[0031] Through the above technical solution, this application achieves on-demand heating of the edge-sealing adhesive layer and directional discharge of ineffective hot air. It automatically replenishes hot air when the heating plate temperature is insufficient, preventing adhesion failure caused by adhesive layer cooling. The mechanical switching of the air outlet path ensures heating efficiency and energy utilization, solving the production interruption problem caused by manual supplemental heating.

[0032] Compared to existing technologies, traditional hot air guns rely on heating element temperature regulation, resulting in response delays due to thermal inertia. This solution directly switches the airflow path via a mechanical structure, eliminating the need to wait for the heating element to heat up or cool down, thus achieving real-time control of the airflow status. Furthermore, during board replacement intervals, the hot air gun does not require power interruption; hot air is vertically discharged through the air guide, preventing high-temperature gas from directly impacting the bonding rollers.

[0033] Through the above technical solution, this application can quickly cut off the horizontal air outlet path during the plate processing gap, directing residual heat to the air vent for dissipation, effectively preventing heat damage to the bonding wheel surface. The dynamic path switching mechanism ensures that the dual requirements of adhesive layer temperature compensation and equipment protection are met simultaneously.

[0034] Specifically, in this embodiment, the bottom of the hot air duct is rotatably connected to the outlet pipe 11 of a hot air blower, and the hot air blower is fixedly installed inside the edge banding machine to supply hot air to the hot air duct. In other embodiments, the hot air blower can be equivalently replaced by other hot air generating mechanisms.

[0035] In other applications, hot air blowers can also be used as equivalent alternatives to other cold air generating mechanisms for continuous or intermittent cooling of food or other items.

[0036] Rotary connection refers to a rotatable mechanical connection structure between the hot air duct and the outlet duct, which can be achieved using a rotary joint, allowing the hot air duct to be adjusted around the axis of the outlet duct. Fixed installation refers to the hot air blower being rigidly fixed to the internal frame of the edge banding machine using a rigid connection, which can be achieved using bolts or welding, to prevent the hot air blower from shifting due to vibration during equipment operation.

[0037] Specifically, the hot air blower delivers hot air to the hot air duct array via an outlet duct. The hot air duct array is adjustable at multiple angles through a rotating connection structure to accommodate the heating needs of different edge sealing strip positions. After the hot air blower is fixedly installed, its outlet duct and the hot air duct array form a stable connection, ensuring a continuous supply of hot air.

[0038] In at least one embodiment, the hot air duct includes a duct body 21, an air guide 211 is formed at the top of the duct body, and a plurality of hot air ducts 23 are formed on one side of the duct body. Hot air can enter from the bottom of the duct body and be ejected from either the air guide or the hot air duct through a selected air outlet path.

[0039] The duct body refers to a hollow metal structure, typically made of stainless steel or aluminum alloy, used to guide the flow of hot air and distribute it to different air outlet paths. The air guide is an opening located at the top of the duct body, typically a circular or rectangular hole, used to exhaust hot air upwards. The hot air duct refers to multiple branch pipes distributed along the side wall of the duct body, typically made of metal pipe with a diameter of 5-15 mm, used to output hot air laterally to cover the sealing strip area.

[0040] Specifically, the duct body serves as the core channel for hot air delivery, with its bottom connected to the outlet duct of the hot air blower. When the sealing component closes the air vent, the hot air is forcibly diverted to the side hot air duct and concentrated, forming a horizontal heat flow that covers the adhesive surface of the sealing strip. The air vent and the hot air duct form complementary air outlet paths, and the two modes can be quickly switched through the action of the sealing component. For example, when concentrated heating is required, the hot air duct outputs a directional heat flow; in the non-working state, the air vent opens, allowing excess hot air to be discharged upwards.

[0041] Furthermore, when the hot air duct is arranged perpendicular to the main pipe, the airflow blowing from the end of the duct can form a uniform and consistent hot air jet, precisely projected onto the surface of the component to be heated, achieving efficient heat conduction. If the hot air duct structure is eliminated and only circular air outlets are arranged in a linear array on the main pipe, from the perspective of fluid mechanics, under ideal conditions (ignoring boundary layer effects, airflow turbulence, and other complex factors), a similar airflow distribution pattern can be approximately obtained. However, since the hot air jet direction of the main pipe is from bottom to top, when relying solely on the circular outlets on the duct, according to the law of conservation of momentum and the Coanda effect, the hot air will undergo momentum deflection due to the entrainment effect of the surrounding static air at the moment of exiting the outlet, causing the airflow direction to deflect obliquely upwards. At the same time, affected by the separation effect at the edge of the nozzle, the airflow will form a complex vortex structure during the exit process, causing a large amount of heat energy to dissipate into the surrounding environment in the form of turbulent dissipation. This non-directional energy loss not only significantly reduces the effective heat flux density at the air outlet, leading to uneven heat flow distribution on the surface of the heated components, but also increases energy consumption due to the decrease in thermal efficiency.

[0042] Conventional hot air guns, limited by thermal inertia, require a significant temperature rise delay during startup due to the need for heating, heat storage, and convection heat transfer, failing to reach the preset temperature instantaneously. This design employs a heat flow bypass maintenance technology. During standby, hot air is circulated to a buffer chamber for pre-heat storage (temperature stabilized at ±2℃). During edge sealing, a solenoid valve (switching time ≤0.3s) rapidly switches the air duct, directing the pre-stored hot air to the workstation. This enables rapid spatial switching of heat output, completely eliminating the temperature rise delay and improving response speed and temperature control accuracy.

[0043] Furthermore, the plurality of hot air ducts are arranged linearly along the vertical direction of the duct body.

[0044] Furthermore, an angle adjustment plate 22 is fixedly connected to the tube body, and an arc-shaped elongated hole 221 is formed on the angle adjustment plate. Correspondingly, a threaded hole 102 is provided on the table surface.

[0045] The angle adjustment plate refers to a plate-like structure fixed to the pipe body, which can be made by stamping metal sheets. It is used to adjust the angle of the hot air pipe through an arc-shaped elongated hole and bolts, thereby changing the air outlet direction of the hot air duct. The arc-shaped elongated hole refers to a curved through hole made on the angle adjustment plate, which can be made by laser cutting or machining. Its curvature matches the rotation trajectory of the pipe body. The threaded hole refers to an internal threaded hole machined on the table, which can be made by drilling and tapping. It is used to cooperate with the bolt passing through the arc-shaped elongated hole, and the position of the angle adjustment plate is fixed by tightening the bolt.

[0046] Furthermore, when the hot air duct is rotated and connected to the tabletop, the bolt passes through the arc-shaped elongated hole of the angle adjustment plate and is threaded into the threaded hole.

[0047] In at least one embodiment, the sealing assembly includes a linear drive component 33, the execution end of which is connected to a sealing cover 331, and the linear drive component is capable of driving the sealing cover away from or against the air vent of the hot air duct.

[0048] The linear drive component refers to a mechanical device that outputs power through linear motion, specifically a cylinder or electric cylinder. Its function is to move the sealing cover along a linear trajectory to change the opening and closing state of the air vent. The actuator refers to the end structure of the linear drive component that directly outputs power, specifically a telescopic rod or push rod. Its function is to transmit power to the sealing cover, causing it to move. The sealing cover is a plate-like structure used to cover or expose the air vent, specifically made of high-temperature resistant metal or ceramic materials. Its function is to control the switching of the hot air path through positional changes.

[0049] Specifically, when the linear drive component is in the retracted state, the sealing cover is moved away from the air vent, allowing hot air to be discharged upwards from the vent. When the linear drive component is in the extended state, the sealing cover is pushed into close contact with the air vent, forcing hot air out from the side hot air duct. This process is achieved through mechanical drive, enabling rapid switching without manual intervention. The opening and closing state of the air vent directly correlates with the selection of the hot air path, thus achieving instantaneous switching of the heating mode during the edge sealing process.

[0050] Compared to existing technologies, hot air guns use manual rotary valves to adjust the airflow, which cannot instantly cut off the hot air output from the air vent when the machine stops, resulting in continuous residual heat ejection. This solution, through the cooperation of a linear drive component and a sealing cap, can immediately release the air vent to cut off the hot air supply, eliminating residual heat ejection caused by thermal inertia and preventing the bonding roller from suffering uncontrolled thermal shock.

[0051] Through the above technical solution, this application realizes instantaneous switching control of hot air output path, and simultaneously cuts off the hot air overflow of hot air pipe when the board is replaced, effectively preventing the residual heat of heating element from being continuously sprayed onto bonding wheel through hot air pipe, solving the technical problem of aging damage to rubber parts caused by thermal shock, and ensuring the service life of core components of edge banding machine.

[0052] Furthermore, the sealing assembly also includes a support rod 31, with a support plate 32 at the top of the support rod, and the linear drive component is mounted on the support plate.

[0053] The support rod is a rod-shaped structure used to support the linear drive components. It can be made of metal and serves to fix and support the components, ensuring their stability during operation. The support plate is a plate-shaped structure installed on top of the support rod. It can be made of rectangular steel plate and is used to support and fix the linear drive components, providing a mounting base.

[0054] Furthermore, a smoke hood 34 is provided at the bottom of the support plate, and the sealing cover is located inside the smoke hood.

[0055] The fume hood is a bottom-opening structure connected to the support plate and housing the sealing cover. It can be made of metal or high-temperature resistant plastic and is connected to the negative pressure mechanism. This structure collects hot air exhausted from the air vent when the sealing cover is open and guides the hot air flow in a specific direction using negative pressure. The sealing cover being inside the fume hood means that its movement trajectory is entirely within the internal space of the fume hood. This is achieved through the vertical stroke of a linear drive component, preventing hot air overflow from interfering with equipment operation.

[0056] Through the above technical solution, this application solves the technical problem of residual heat impacting the bonding wheel after the hot air gun is turned off in the prior art. By continuously collecting heat in the area below the sealing cover through the fume hood, the residual heat that may cause damage to the components is directionally discharged into the system. While ensuring the function of rapid hot air switching, it significantly reduces the probability of the bonding wheel coming into contact with high-temperature gas, thereby ensuring the stability of the edge sealing process and extending the service life of key components.

[0057] In some embodiments, the support plate is provided with a plurality of vertical rods 332, and the top of the plurality of vertical rods is provided with an mounting plate 333. The cylinder or electric cylinder is fixedly connected to the mounting plate, and the telescopic rod of the cylinder or electric cylinder passes through the mounting plate and the support plate in sequence and is connected to a sealing cover.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hot air rapid control valve, installed on the table of an edge banding machine, characterized in that, It includes a hot air duct and a sealing assembly. The hot air duct is rotatably connected to the table surface, and the sealing assembly can be moved to change the air outlet path of the hot air duct. The hot air duct includes a duct body, an air guide is formed at the top of the duct body, and a plurality of hot air ducts are formed on one side of the duct body; Hot air can enter from the bottom of the pipe and be ejected from either the air guide or the hot air duct through a single air outlet path. The sealing assembly includes a linear drive component, the execution end of which is connected to a sealing cover. The linear drive component can drive the sealing cover away from or against the air vent of the hot air duct.

2. The hot air rapid control valve according to claim 1, characterized in that, The bottom of the hot air duct is rotatably connected to the air outlet pipe of the hot air blower, and the hot air blower is fixedly installed inside the edge banding machine.

3. The hot air rapid control valve according to claim 1, characterized in that, An angle adjustment plate is fixedly connected to the tube body, and an arc-shaped elongated hole is formed on the angle adjustment plate. A threaded hole is provided on the platform.

4. The hot air rapid control valve according to claim 3, characterized in that, When the hot air duct is rotated and connected to the tabletop, the bolt passes through the arc-shaped elongated hole of the angle adjustment plate and is threaded into the threaded hole.

5. The hot air rapid control valve according to claim 1, characterized in that, The linear drive component is a pneumatic cylinder or an electric cylinder.

6. The hot air rapid control valve according to claim 1, characterized in that, The sealing assembly also includes a support rod, the top of which is provided with a support plate, and the linear drive component is mounted on the support plate.

7. The hot air rapid control valve according to claim 6, characterized in that, The support plate is equipped with a smoke hood at its bottom, and the sealing cover is located inside the smoke hood.

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