Electromagnetic oven panel gluing equipment

Abstract

This invention relates to the field of adhesive coating technology and discloses an adhesive coating device for an induction cooker panel, including a base, a linear guide rail on the base, a spray gun fixedly mounted on the linear guide rail, the spray gun including an adhesive supply pipe and a movable nozzle, a back suction valve on the adhesive supply pipe, a fixed pipe connecting the adhesive supply pipe and the movable nozzle, the fixed pipe being fixedly connected to the linear guide rail, a limit cylinder coaxially fixedly mounted on the fixed pipe, the movable nozzle coaxially mounted inside the limit cylinder and connected to the fixed pipe through a cylindrical elastic membrane, a magnet fixedly mounted on the movable nozzle, and a winding coaxially mounted on the limit cylinder; this application achieves rapid stretching and breaking of the adhesive by driving the movable nozzle to rotate circumferentially and causing the elastic membrane to undergo helical torsional deformation, forming an axial tensile force that drives the movable nozzle to move axially, thereby achieving rapid stretching of the adhesive and breaking it. At the same time, combined with the back suction effect of the back suction valve and the pressure-holding design of the elastic membrane, it effectively solves the problem of easy stringing of the adhesive at the end of the coating process.

Description

Technical Field

[0001] This invention relates to the field of adhesive coating machine technology, specifically to an adhesive coating device for an induction cooker panel. Background Technology

[0002] Large-scale induction cooker glue applicators are precision automated devices specifically designed for commercial or industrial-grade induction cookers. Driven by a three-axis servo system, the applicator head applies glue along the back of the induction cooker, ensuring uniform glue distribution and a strong bond to the back panel or cooktop mounting surface. Compared to manual application, induction cooker glue applicators save 40%-60% on glue, avoiding issues like missed areas and glue overflow, improving mass production efficiency, and reducing labor costs and after-sales risks.

[0003] As the production quality of induction cookers continues to improve, the market's requirements for the precision and uniformity of adhesive coating on their panels are also gradually increasing. However, existing adhesive coating equipment still has many technical defects and cannot meet the demand for high-quality adhesive coating. For example, Chinese patent CN202010514404.8 discloses a special glass all-round automatic adhesive coating machine, which includes a machine tool, a hydraulic lifter, a worktable, a slide, a glue gun and a PLC controller. The glue gun is moved horizontally and vertically by a servo motor and the height of the worktable is adjusted by the hydraulic lifter to adapt to the coating of irregular glass. However, in actual application, during the initial coating stage, the pressure in the valve chamber is prone to fluctuation at the moment of opening the glue, resulting in the glue being sprayed out at a large flow rate. This results in excessive glue at the beginning of the coating, which seriously affects the coating precision. At the same time, at the end of the coating, due to the high viscosity and strong extensibility of the glue, coupled with the glue gun's untimely back suction, insufficient back suction force or improper moving speed setting, the glue cannot break in time, resulting in stringing. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an adhesive coating device for induction cooker panels. This device has the advantages of a glue gun that can stably draw back the glue to avoid abnormal glue volume and stringing. It solves the problems of excessive glue volume at the beginning and easy stringing of glue at the end of the coating process caused by pressure fluctuations in the initial coating valve chamber of existing adhesive coating devices.

[0005] (II) Technical Solution To achieve the goal of stable glue suction and avoid abnormal glue volume and stringing, the present invention provides the following technical solution: an induction cooker panel glue application device, including a base, a linear guide rail on the base, a glue application spray gun fixedly mounted on the linear guide rail, the spray gun including a glue supply pipe and a movable nozzle, a suction valve on the glue supply pipe, a fixed pipe connected between the glue supply pipe and the movable nozzle, the fixed pipe being fixedly connected to the linear guide rail, a limiting cylinder coaxially fixedly mounted on the fixed pipe, the movable nozzle coaxially mounted inside the limiting cylinder and connected to the fixed pipe through a cylindrical elastic membrane, a magnet fixedly mounted on the movable nozzle, and a winding coaxially mounted on the limiting cylinder. When the winding is energized to generate a rotating magnetic field, it drives the magnet to rotate the movable nozzle circumferentially, and causes the elastic membrane to undergo helical torsional deformation, causing the movable nozzle to move axially toward the fixed pipe.

[0006] Preferably, the base is provided with a conveying mechanism, the conveying mechanism is provided with an induction cooker panel, the base is provided with a liquid storage tank connected to the back suction valve, and the liquid storage tank is provided with a metering pump and a liquid control structure.

[0007] Preferably, the elastic membrane includes a fixed section, a flexible section, and a connecting section. The fixed section is sealed and fixedly connected to the fixed tube, and the connecting section is sealed and fixedly connected to the movable nozzle. The flexible section is located between the fixed section and the connecting section and is integrally formed. The inner sidewall of the flexible section is provided with three or more sets of shearing ribs that extend spirally along its axial direction at equal intervals along its circumference. When the elastic membrane undergoes spiral torsional deformation, the axial length of the flexible section shortens and the radial diameter shrinks. The three or more sets of shearing ribs approach and adhere to each other along the circumference, thereby creating a sealing and shearing effect on the adhesive.

[0008] Preferably, the magnet is fixedly installed on the outer wall of the movable nozzle, and four or more sets of magnets are arranged in an equidistant array along the circumference of the movable nozzle. The axial length of the winding is greater than the axial length of the magnet, and the axial length of the winding is adapted to the axial movement stroke of the magnet.

[0009] Preferably, the inner wall of the movable nozzle is provided with a guide groove that extends spirally along its axial direction, and three or more sets of the guide groove are arranged equidistantly along the circumference of the movable nozzle. When the movable nozzle rotates circumferentially, the guide groove rotates with the movable nozzle and applies an axial reaction force toward the glue supply pipe to the glue liquid flowing through the interior of the movable nozzle.

[0010] Preferably, the movable nozzle is slidably connected to the limiting cylinder.

[0011] Preferably, four or more of the magnets are arranged in a Heilbeck circumferential array along the movable nozzle.

[0012] Preferably, the diameter of the flexible segment is smaller than the diameter of the fixed segment and the connecting segment, the inner diameter of the shear bar is continuously and gradually varied along its own axial direction, and the inner diameter of the shear bar near the fixed segment and the connecting segment is smaller than the inner diameter near the axial center of the flexible segment.

[0013] Preferably, the winding is also coaxially provided with a housing, the housing is fixedly connected to the limiting cylinder, and the housing is provided with a connecting contact that is connected to the winding, and the connecting contact is connected to a power source.

[0014] Preferably, when the movable nozzle rotates circumferentially, the shearing rib rotates and applies an axial force toward the adhesive supply pipe to the adhesive flowing through the elastic membrane.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides an adhesive coating device for an induction cooker panel, which has the following beneficial effects: 1. This induction cooker panel adhesive coating equipment generates a rotating magnetic field through the combined use of a winding structure and a magnet structure. This magnetic field drives the movable nozzle to rotate circumferentially, causing the elastic membrane to undergo helical torsional deformation and radial contraction. This, in turn, generates axial tension, causing the movable nozzle to move axially. This achieves rapid stretching and breaking of the adhesive. Simultaneously, combined with the suction effect of the back suction valve and the pressure-holding design of the elastic membrane, it effectively solves the problem of adhesive stringing at the end of traditional adhesive coating equipment, ensuring that residual adhesive is completely removed and preventing adhesive rebound. The reset function of the elastic membrane can drive the movable nozzle back to its initial position, ensuring the consistency of subsequent adhesive coating operations. Compared with traditional adhesive coating equipment, there is no need to set up a complex adhesive breaking drive structure, simplifying the overall structure of the equipment, while also preventing adhesive stringing.

[0016] 2. This induction cooker panel adhesive coating equipment utilizes a combination of an elastic membrane structure and a shear rib structure. Three or more shear ribs come close together during the spiral twisting and radial contraction of the elastic membrane, forming staggered shear surfaces and generating continuous, concentrated axial shear force. This enables rapid adhesive breakage, resulting in superior adhesive breakage compared to traditional coating equipment with shear structures. It effectively avoids stringing caused by incomplete adhesive breakage. Simultaneously, the shear ribs, after coming together, completely drain the adhesive from inside the elastic membrane, solving the problem of excessive adhesive at the beginning of each coating cycle in traditional equipment. This ensures uniform adhesive application at the beginning of each coating cycle and improves the overall quality of the induction cooker panel adhesive coating. Attached Figure Description

[0017] Figure 1This is a three-dimensional structural schematic diagram of the induction cooker panel adhesive coating equipment of the present invention; Figure 2 This is a front view of the structure of the induction cooker panel adhesive coating equipment in this invention; Figure 3 This is a top view of the structure of the induction cooker panel adhesive coating equipment in this invention; Figure 4 This is a schematic diagram of the spray gun structure of the induction cooker panel adhesive coating equipment in this invention; Figure 5 This is a cross-sectional view of the spray gun structure of the induction cooker panel adhesive coating equipment in this invention; Figure 6 This is a schematic diagram of the outer shell structure of the induction cooker panel adhesive coating equipment in this invention; Figure 7 This is a cross-sectional view of the elastic membrane structure of the induction cooker panel adhesive coating device in this invention; Figure 8 This is a three-dimensional cross-sectional view of the spray gun structure of the induction cooker panel adhesive coating equipment in this invention.

[0018] In the diagram: 1. Base; 2. Linear guide rail; 3. Spray gun; 31. Adhesive supply pipe; 32. Movable nozzle; 321. Guide channel; 33. Fixed pipe; 34. Limiting cylinder; 4. Back suction valve; 5. Elastic membrane; 51. Fixed section; 52. Flexible section; 521. Shearing rib; 53. Connecting section; 6. Magnet; 7. Winding; 8. Conveying mechanism; 9. Housing; 91. Connecting contact. Detailed Implementation

[0019] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-8An induction cooker panel adhesive coating device includes a base 1, a linear guide rail 2 on the base 1, an adhesive spray gun 3 fixedly mounted on the linear guide rail 2, the linear guide rail 2 being fastened to the mounting surface along the length of the base 1 by countersunk bolts, the guide rail slider and the fixing seat of the spray gun 3 being rigidly connected by bolts, and a positioning pin is added at the connection to ensure coaxiality and perpendicularity. The spray gun 3 includes a glue supply pipe 31 and a movable nozzle 32. A back suction valve 4 is installed on the glue supply pipe 31. The back suction valve 4 is a pneumatic normally closed type and is sealed to the glue supply pipe 31 through a flange structure. A fixed pipe 33 is connected between the glue supply pipe 31 and the movable nozzle 32. The fixed pipe 33 is fixedly connected to the linear guide rail 2. The fixed pipe 33 is made of stainless steel. One end of it is detachably connected to the glue supply pipe 31 through a threaded joint, and the other end is fixed to the fixed bracket of the linear guide rail 2 by clamping. A limit cylinder 34 is also coaxially fixedly installed on the fixed pipe 33. The limit cylinder 34 is a cylindrical hollow structure made of aluminum alloy. Its inner wall is honed to ensure smoothness. The movable nozzle 32 is coaxially mounted inside the limiting cylinder 34 and connected to the fixed tube 33 through a cylindrical elastic membrane 5. The movable nozzle 32 has a cylindrical hollow structure, and its outer wall is fitted with the inner wall of the limiting cylinder 34 with a clearance fit. The mating surfaces are coated with wear-resistant lubricating grease to reduce movement resistance. The elastic membrane 5 is made of aging-resistant and highly elastic fluororubber. Its fixed section 51 is sealed and pressed against the stepped surface of the fixed tube 33 by a clamp. The connecting section 53 is also sealed and fixed to the connecting end of the movable nozzle 32 by a clamp. Both connections are reinforced with high-temperature resistant epoxy adhesive. A magnet 6 is fixedly mounted on the movable nozzle 32, and a winding 7 is coaxially arranged on the limiting cylinder 34. The outer wall of the movable nozzle 32 is machined with evenly distributed arc-shaped slots along the circumference. The magnet 6 is a neodymium iron boron permanent magnet 6, which is embedded in the slot and fixed by epoxy resin curing. The surface of the magnet 6 is flush with the outer wall of the movable nozzle 32 to avoid interference. The winding 7 is formed by winding enameled copper wire on a ring frame. The ring frame is fixed in the groove of the inner wall of the limiting cylinder 34 by epoxy resin potting. A heat dissipation gap is reserved between the winding 7 and the inner wall of the limiting cylinder 34, and the lead wire of the winding 7 is led out through the wire hole on the side wall of the limiting cylinder 34 and connected to the connecting contact 91. When the winding 7 is energized and generates a rotating magnetic field, it drives the magnet 6 to rotate the movable nozzle 32 circumferentially, and causes the elastic membrane 5 to undergo helical torsional deformation, which drives the movable nozzle 32 to move axially toward the fixed tube 33.

[0021] Please see Figures 1-8The base 1 is equipped with a conveying mechanism 8, on which an induction cooker panel is mounted. The conveying mechanism 8 adopts a roller conveying structure, with rollers arranged parallel to the length of the base 1 and connected to a drive motor via a coupling. The upper surface of the conveying mechanism 8 is parallel to the adhesive application path of the spray gun 3, and the spacing is fixed. The conveying mechanism 8 is also equipped with positioning blocks distributed along the edge of the induction cooker panel. The base 1 contains a liquid storage tank (not shown) connected to the back suction valve 4. The liquid storage tank is equipped with a metering pump and an adhesive control structure. The metering pump is a high-precision gear metering pump, with its input end connected to the outlet at the bottom of the liquid storage tank and its output end connected to the adhesive supply pipe 31. The adhesive control structure includes a pressure sensor, a flow regulating valve, and a temperature controller. The pressure sensor is installed on the adhesive supply pipe 31 near the spray gun 3. The flow regulating valve is linked to the metering pump. The heating element of the temperature controller is embedded in the side wall interlayer of the liquid storage tank. The elastic membrane 5 includes a fixed section 51, a flexible section 52, and a connecting section 53. The fixed section 51 is sealed and fixedly connected to the fixed tube 33, and the connecting section 53 is sealed and fixedly connected to the movable nozzle 32. The flexible section 52 is located between the fixed section 51 and the connecting section 53 and is integrally formed. Both the fixed section 51 and the connecting section 53 of the elastic membrane 5 are thickened cylindrical sections with stepped surfaces on their inner walls that are compatible with the fixed tube 33 and the movable nozzle 32. The fixed section 51 is pressed and fixed to the connecting end of the fixed tube 33 by a clamp. A rubber gasket is provided on the inner side of the clamp. The connecting section 53 is fixed to the movable nozzle 32 by the same clamp pressing method. The fixed section 51, the connecting section 53, and the flexible section 52 are integrally formed by injection molding. The wall thickness of the flexible section 52 is smaller than that of the fixed section 51 and the connecting section 53. The thickened design of the fixed section 51 and the connecting section 53 enhances the rigidity of the connection. Combined with the sealing structure of the clamp and rubber gasket, it effectively prevents glue leakage and air ingress, ensuring the airtightness of the closed chamber. The one-piece molding process avoids gaps and stress concentrations that may occur in segmented connections, ensuring the integrity and stability of the elastic membrane 5 during deformation. The thin-walled design of the flexible section 52 gives it good torsional and shrinkage properties. The inner wall of the flexible section 52 is equidistantly arranged with three or more sets of shear ribs 521 extending spirally along its axial direction. The cross-section of the shear ribs 521 is triangular, and its root is integrally injection molded with the inner wall of the flexible section 52. When arranged circumferentially, the spiral trajectories of adjacent shear ribs 521 are parallel to each other. The side of the shear ribs 521 facing the glue channel inside the elastic membrane 5 is integrally formed with a flexible cutting edge. This cutting edge is continuously arranged along the axial spiral extension direction of the shear ribs 521, and the angle of the cutting edge is adapted to the spiral direction and transitions synchronously with the gradual change of the inner diameter of the shear ribs 521. The circumferentially equidistant array of shearing ribs 521 can approach synchronously from multiple directions during contraction, ensuring uniform shearing. The spiral extension trajectory is adapted to the torsional motion of the elastic membrane 5, enabling continuous shearing of the adhesive during torsion. The flexible cutting edge combines rigidity and elasticity, ensuring the concentration of shearing force while avoiding scratching the adhesive channel or hindering the deformation of the elastic membrane 5.When the elastic membrane 5 undergoes helical torsional deformation, the axial length of the flexible segment 52 shortens and its radial diameter shrinks. Furthermore, three or more sets of shear ribs 521 approach and adhere to each other circumferentially, creating a sealing and shearing effect on the adhesive. Magnets 6 are fixedly installed on the outer wall of the movable nozzle 32. Four or more sets of magnets 6 are arranged equidistantly along the circumference of the movable nozzle 32. The outer wall of the movable nozzle 32 is machined with uniformly distributed rectangular mounting grooves along its circumference. Magnets 6 are arc-shaped block permanent magnets, which are embedded in the mounting grooves and then cured and fixed with high-temperature resistant epoxy adhesive. The axial length of the winding 7 is greater than the axial length of the magnet 6. The winding 7 adopts a ring-shaped winding structure, wound on an insulating frame and then coaxially fixed to the inner wall of the limiting cylinder 34. Its axial length is designed to be greater than the axial length of the magnet 6, and this length matches the maximum axial movement stroke of the movable nozzle 32, ensuring that the magnet 6 remains completely within the rotating magnetic field range generated by the winding 7 as the movable nozzle 32 moves axially. Sufficient axial length of winding 7 ensures that magnet 6 and winding 7 remain effectively coupled throughout the entire axial movement of the movable nozzle 32, thereby continuously generating a stable driving force to guarantee the torsion and contraction of the elastic membrane 5 and the axial movement of the movable nozzle 32. Four or more sets of magnets 6 are arranged in a Halebeck circumferential array along the movable nozzle 32. The magnetic poles of adjacent magnets 6 are alternately arranged at a preset angle to form a unidirectionally enhanced magnetic field distribution. This maximizes the magnetic field strength and utilization rate. Compared with a conventional circumferential array, the Halebeck array can form a stronger concentrated magnetic field on the outside of the movable nozzle 32, reducing magnetic field leakage and significantly improving the coupling efficiency between the rotating magnetic field generated by winding 7 after energization and magnet 6. Consequently, under the same current input, a larger circumferential electromagnetic torque is generated, driving the movable nozzle 32 to rotate faster and more smoothly, providing sufficient and stable power for the helical torsional deformation of the elastic membrane 5. A housing 9 is coaxially mounted on the winding 7. The housing 9 is fixedly connected to the limiting cylinder 34. The housing 9 is made of aluminum alloy and has a cylindrical hollow structure. Its inner wall is clearance-fitted with the outer wall of the winding 7. One end of the housing 9 is fixedly connected to the end face of the limiting cylinder 34 by circumferentially distributed bolts. A rubber sealing gasket is installed at the connection to achieve dustproof and waterproof sealing. A connecting contact 91 is provided on the housing 9 to connect to the winding 7. The connecting contact 91 is connected to a power source. The internal terminals of the connecting contact 91 are fixed to the leads of the winding 7 by welding, and the external terminals are connected to the power source by wires. The wires are protected by corrugated tubing.

[0022] Please see Figures 1-8The adhesive is delivered to the fixed pipe 33 via the adhesive supply pipe 31, then flows through the interior of the elastic membrane 5, and finally flows out from the movable nozzle 32. The movable nozzle 32 moves via the linear guide rail 2, completing the adhesive application on the induction cooker panel. When the movable nozzle 32 reaches the adhesive application endpoint and needs to be cut off, a three-phase alternating current is supplied to the winding 7, generating a rotating magnetic field. This rotating magnetic field couples with the magnet 6 fixedly mounted on the movable nozzle 32, forming a circumferential electromagnetic torque. This torque drives the magnet 6 to rotate the movable nozzle 32 circumferentially. Because the movable nozzle 32 and the limiting cylinder 34 are slidably connected, the movable nozzle 32 can achieve a combined axial and circumferential motion. During the circumferential rotation of the movable nozzle 32, the elastic membrane 5, which is sealed and fixedly connected to it, rotates synchronously. The elastic membrane 5 is made of elastic material, and its fixed section 51 is sealed and fixedly connected to the fixed pipe 33 on the linear guide rail 2. Therefore, the elastic membrane 5 will undergo circumferential spiral torsion during rotation. The radial contraction and circumferential helical twisting together form an axial tensile force towards the fixed tube 33. This tensile force is transmitted to the movable nozzle 32 through the connecting section 53, causing the movable nozzle 32 to move rapidly axially along the limiting cylinder 34. This causes the adhesive strands between the dispensing port of the movable nozzle 32 and the adhesive already applied to the induction cooker panel to be stretched rapidly, causing the adhesive to break quickly due to the stretching force exceeding its own cohesive force. During this process, the back suction valve 4 needs to be activated simultaneously to back suction the adhesive residue inside the elastic membrane 5 and the movable nozzle 32. The winding 7 is kept energized for 50-200ms to keep the elastic membrane 5 in a contracted state for pressure holding, thereby suppressing the rebound of the adhesive and ensuring that the residual adhesive is completely removed, thus solving the problems of stringing and large ends. After the pressure holding is completed, the winding 7 is de-energized, the rotating magnetic field disappears, the elastic membrane 5 releases its own elastic potential energy to achieve reset, and at the same time, it drives the movable nozzle 32 to return to the initial adhesive application position along the limiting cylinder 34, waiting for the next adhesive application command. Furthermore, the diameter of the flexible section 52 of the elastic membrane 5 is smaller than that of the fixed section 51 and the connecting section 53, forming a Venturi-like structure. When the adhesive flows through the flexible section 52, the reduced channel cross-sectional area will naturally increase the flow rate of the adhesive. This increased flow rate allows the adhesive to flow out from the moving nozzle 32 in a more stable and continuous state, avoiding the problem of adhesive accumulation or uneven adhesive lines caused by slow flow rate. It can also reduce the residence time of the adhesive in the channel of the elastic membrane 5, reduce the probability of viscosity change due to long residence time, ensure the consistency of adhesive properties during the coating process, enhance the wetting and adhesion effect of the adhesive to the surface of the induction cooker panel, reduce missed coating and adhesive breakage, and is less likely to trap air and generate bubbles, thus making the adhesive layer after coating more uniform and smooth.

[0023] Please see Figures 1-8The diameter of the flexible segment 52 is smaller than that of the fixed segment 51 and the connecting segment 53. The inner diameter of the shearing rib 521 is continuously and gradually varied along its own axis. The inner diameter of the shearing rib 521 near the fixed segment 51 and the connecting segment 53 is smaller than the inner diameter near the axial center of the flexible segment 52. This allows the continuous and gradual change of the inner diameter of the shearing rib 521 to match the deformation trajectory of the flexible segment 52. When the flexible segment 52 contracts, the shearing rib 521 can evenly approach and fit along the gradual trajectory, ensuring that the shearing force is continuously distributed along the adhesive channel. This effectively cuts off the adhesive and completely removes the residual adhesive inside the elastic membrane 5 after fitting, avoiding the phenomenon of excessive adhesive at the beginning of the next application due to residual adhesive. The inner wall of the movable nozzle 32 is provided with a guide groove 321 extending spirally along its axial direction. Three or more sets of guide grooves 321 are arranged equidistantly along the circumference of the movable nozzle 32. The movable nozzle 32 is CNC machined, and the guide grooves 321 on its inner wall are formed by milling. The cross-section of the guide grooves 321 is an isosceles trapezoid, extending spirally along the axial direction of the movable nozzle 32, with the spiral direction consistent with that of the shear rib 521. The guide grooves 321 can form a stable hydrodynamic interaction with the adhesive flowing inside. The trapezoidal cross-section avoids adhesive stagnation in the groove and concentrates the force. When the movable nozzle 32 rotates circumferentially, the guide grooves 321 rotate with the movable nozzle 32 and apply an axial reaction force towards the adhesive supply pipe 31 to the adhesive flowing inside the movable nozzle 32. When the movable nozzle 32 rotates circumferentially, the shear rib 521 rotates and applies an axial force towards the glue supply pipe 31 to the glue flowing through the elastic membrane 5. The movable nozzle 32 is slidably connected to the limiting cylinder 34.

[0024] Please see Figures 1-8 When the movable nozzle 32 rotates circumferentially, it synchronously drives the elastic membrane 5, which is fixedly connected, to undergo helical torsion. Since the diameter of the flexible section 52 of the elastic membrane 5 is smaller than that of the fixed section 51 and the connecting section 53, and the inner wall of the flexible section 52 has three or more sets of axially spirally extending shear ribs 521 arranged equidistantly along the circumferential direction, the spiral direction and lead of each shear rib 521 are consistent and have flexible cutting edges, so when the flexible section 52 undergoes radial contraction during the helical torsion process, the shear ribs 521 will move closer to each other and fit tightly together along the circumferential direction. During the fitting process, the spiral cutting edges of the shear ribs 521 together form staggered shear surfaces. At the same time, the axial shortening action of the elastic membrane 5 drives the shear ribs 521 to move axially along the adhesive channel. This composite motion of circumferential fitting and compression combined with axial synchronous movement allows the flexible cutting edges of the shear ribs 521 to apply continuous and concentrated axial shear force to the adhesive filling the channel of the elastic membrane 5. This shear force can directly destroy the cohesive force between adhesive molecules and achieve the separation of the adhesive. Furthermore, when three or more sets of axially spirally extending shear ribs 521 are bonded together, the adhesive inside the elastic membrane 5 is completely discharged, thus avoiding the large-head phenomenon that occurs during the next application of adhesive.

[0025] Please see Figures 1-8 When the movable nozzle 32 rotates, the spiral guide groove 321 on its inner wall rotates synchronously with the nozzle. The spiral surface of the guide groove 321 interacts with the adhesive flowing through the movable nozzle 32. Since the spiral direction of the guide groove 321 is adapted to the natural outflow direction of the adhesive, it can apply an axial reaction force towards the adhesive supply pipe 31 during its rotation. At the same time, when the elastic membrane 5 rotates with the movable nozzle 32 and generates a spiral torsion, the shear rib 521 on the inner side of its flexible section 52 rotates synchronously. The spiral structure of the shear rib 521 contacts the adhesive and applies an axial force towards the adhesive supply pipe 31. The back suction valve 4 on the adhesive supply pipe 31 is activated synchronously to generate a back suction force towards the adhesive supply pipe 31. This causes the adhesive located between the elastic membrane 5 and the movable nozzle 32 to be subjected to opposite forces in two axial directions at the same time, causing the adhesive to break.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An induction cooker panel adhesive coating device, comprising a base (1), a linear guide rail (2) disposed on the base (1), and an adhesive spray gun (3) fixedly disposed on the linear guide rail (2), characterized in that: The spray gun (3) includes a glue supply pipe (31) and a movable nozzle (32). A back suction valve (4) is provided on the glue supply pipe (31). A fixed pipe (33) is connected between the glue supply pipe (31) and the movable nozzle (32). The fixed pipe (33) is fixedly connected to the linear guide rail (2). A limit cylinder (34) is also coaxially fixedly installed on the fixed pipe (33). The movable nozzle (32) is coaxially arranged in the limit cylinder (34) and connected to the fixed pipe (33) through a cylindrical elastic membrane (5). A magnet (6) is fixedly installed on the movable nozzle (32). A winding (7) is coaxially arranged on the limit cylinder (34). When the winding (7) is energized to generate a rotating magnetic field, it drives the magnet (6) to drive the movable nozzle (32) to rotate circumferentially and causes the elastic membrane (5) to generate a spiral torsional deformation, driving the movable nozzle (32) to move axially toward the fixed pipe (33).

2. The induction cooker panel adhesive coating equipment according to claim 1, characterized in that: The base (1) is provided with a conveying mechanism (8), the conveying mechanism (8) is provided with an induction cooker panel, the base (1) is provided with a liquid storage tank connected to the back suction valve (4), and the liquid storage tank is provided with a metering pump and a glue control structure.

3. The induction cooker panel adhesive coating equipment according to claim 1, characterized in that: The elastic membrane (5) includes a fixed section (51), a flexible section (52), and a connecting section (53). The fixed section (51) is sealed and fixedly connected to the fixed tube (33), and the connecting section (53) is sealed and fixedly connected to the movable nozzle (32). The flexible section (52) is located between the fixed section (51) and the connecting section (53) and is integrally formed. The inner sidewall of the flexible section (52) is provided with three or more sets of shear ribs (521) that extend spirally along its axial direction in an equidistant array along its circumference. When the elastic membrane (5) undergoes spiral torsion deformation, the axial length of the flexible section (52) is shortened and the radial diameter is contracted, and the three or more sets of shear ribs (521) approach and fit together with each other in the circumference.

4. The induction cooker panel adhesive coating equipment according to claim 1, characterized in that: The magnet (6) is fixedly installed on the outer wall of the movable nozzle (32). The magnet (6) is arranged in four or more groups at equal intervals along the circumference of the movable nozzle (32). The axial length of the winding (7) is greater than the axial length of the magnet (6). The axial length of the winding (7) is adapted to the axial movement stroke of the magnet (6).

5. The induction cooker panel adhesive coating equipment according to claim 1, characterized in that: The inner wall of the movable nozzle (32) is provided with a guide groove (321) extending spirally along its axial direction, and the guide groove (321) is arranged in three or more sets at equal intervals along the circumference of the movable nozzle (32). When the movable nozzle (32) rotates circumferentially, the guide groove (321) rotates with the movable nozzle (32) and applies an axial reaction force toward the glue supply pipe (31) to the glue liquid flowing through the movable nozzle (32).

6. The induction cooker panel adhesive coating equipment according to claim 1, characterized in that: The movable nozzle (32) is slidably connected to the limiting cylinder (34).

7. The induction cooker panel adhesive coating equipment according to claim 4, characterized in that: Four or more of the magnets (6) are arranged in a Heilbeck circumferential array along the movable nozzle (32).

8. The induction cooker panel adhesive coating equipment according to claim 3, characterized in that: The diameter of the flexible segment (52) is smaller than the diameter of the fixed segment (51) and the connecting segment (53). The inner diameter of the shear bar (521) is continuously and gradually varied along its own axial direction. The inner diameter of the shear bar (521) near the fixed segment (51) and the connecting segment (53) is smaller than the inner diameter near the axial center of the flexible segment (52).

9. The induction cooker panel adhesive coating equipment according to claim 1, characterized in that: The winding (7) is also coaxially provided with a housing (9), which is fixedly connected to the limiting cylinder (34), and the housing (9) is provided with a connecting contact (91) connected to the winding (7), and the connecting contact (91) is connected to a power source.

10. The induction cooker panel adhesive coating equipment according to claim 3, characterized in that: When the movable nozzle (32) rotates circumferentially, the shearing rib (521) rotates and applies an axial force toward the glue supply pipe (31) to the glue flowing through the elastic membrane (5).

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