A gluing mechanism

Abstract

The utility model relates to the technical field of edge banding machine, especially relates to a gluing mechanism. The mechanism includes gluing assembly and adjusting assembly, and the gluing assembly includes gluing axle, glue door, transmission rod and power source. The adjusting assembly includes pointing seat, swivel ring and transmission part. The pointing seat is located on the gluing assembly, the swivel ring is rotatably arranged on the pointing seat, and the swivel ring is provided with annular scale mark, and the pointing seat is provided with indicating mark. The swivel ring is internally provided with matching part, the transmission part is arranged through the matching part and is in threaded cooperation with the pointing seat, one end of the transmission part is arranged through the pointing seat and abuts against the transmission rod. The swivel ring is provided with locking part, and the locking part is arranged through the matching part and abuts against the transmission part periphery. The utility model provides the scheme, can cooperate through the annular scale mark of swivel ring and the indicating part of pointing seat, realizes the visual adjustment of glue door opening degree, makes the artificial control glue output amount fast and accurately, improves the adjustment efficiency and precision.

Description

Technical Field

[0001] This utility model relates to the field of edge banding machine technology, and in particular to an adhesive application mechanism. Background Technology

[0002] As a core material in furniture production, the quality of edge banding for engineered wood directly affects the product's appearance and long-term reliability. Precise control of the adhesive application rate is crucial in the edge banding process. Insufficient adhesive leads to weak bonding strength, making the board susceptible to moisture erosion and causing expansion and delamination; excessive adhesive results in overflow and waste, and exposed glue lines severely damage the product's aesthetics. Patent CN115365066A discloses an adhesive application mechanism with switchable dual-color adhesive. It controls the initial adhesive dispensing amount through the mechanical linkage of a cylinder's adjusting nut and a connecting rod. When the adjusting nut is tightened, the cylinder's output shaft shortens, causing the connecting rod to rotate clockwise to increase the glue gate opening; when the adjusting nut is loosened, the cylinder's output shaft extends, and the connecting rod rotates counterclockwise to decrease the glue gate opening. While this structure achieves adhesive dispensing control through mechanical adjustment, it relies on the operator visually observing the glue gate position and using a trial-and-error strategy to fine-tune the limiting device. This adjustment process lacks precise quantitative basis, requiring operators to rely on personal experience for repeated adjustments, resulting in low efficiency. Utility Model Content

[0003] To overcome the problems existing in related technologies, this utility model provides a glue application mechanism that can achieve visual adjustment of the glue gate opening through the cooperation of the annular scale mark of the rotating ring and the indicator part of the pointing seat, so that the glue dispensing amount can be quickly and accurately controlled by the operator, thereby improving adjustment efficiency and accuracy.

[0004] This utility model provides an adhesive application mechanism, comprising: The glue application assembly includes a glue application shaft, a glue gate, a transmission rod, and a power source; the glue gate and the glue application shaft cooperate to form a glue dispensing gap, one end of the transmission rod is connected to the glue gate, and the other end is connected to the output end of the power source. The adjustment assembly includes a pointing seat, a rotating ring, and a transmission component; the pointing seat is disposed on the adhesive application assembly, the rotating ring is rotatably disposed on the pointing seat, and the rotating ring is provided with annular scale markings, and the pointing seat is provided with indicator markings; The rotating ring has a mating part inside, the transmission component passes through the mating part and is threadedly engaged with the pointing seat, and one end of the transmission component passes through the pointing seat and abuts against the transmission rod; The rotating ring is provided with a locking element, which passes through the mating part and abuts against the outer periphery of the transmission element.

[0005] In some embodiments, a spring is fitted around the outer periphery of the transmission member, with one end of the spring abutting the end of the mating part and the other end abutting the outer wall surface of the pointing seat.

[0006] In some embodiments, the rotating ring is provided with a first groove, the mating part is a sleeve, the transmission component is a stud, and the locking component is a miter screw; the miter screw is housed in the first groove, and the miter screw is threadedly connected to the sleeve and abuts against the outer periphery of the stud.

[0007] In some embodiments, the lead of the stud is 0.5 mm to 2 mm.

[0008] In some embodiments, the adjusting assembly further includes a limiting device and a limiting screw. The limiting device is located on the side of the transmission rod away from the transmission component, and the limiting screw is located on the adhesive application assembly, with the limiting screw opposite to the limiting device.

[0009] In some embodiments, the power source is a cylinder, and the transmission rod is a connecting rod; the output shaft of the cylinder is provided with a U-shaped connecting block, and the U-shaped connecting block is provided with an optical shaft; one end of the connecting rod is provided with a second groove, and the optical shaft is inserted into the second groove; the middle of the connecting rod is provided with a hexagonal through hole for a glue gate to pass through, and one end of the glue gate is a prism structure adapted to the hexagonal through hole; when the cylinder output shaft extends or retracts, it drives the connecting rod to rotate around the central axis of the hexagonal through hole.

[0010] In some embodiments, the glue application mechanism further includes a melt box and a support; the melt box has a cavity, one side of which forms a glue outlet; the support is located at the bottom of the melt box, and the glue application shaft is rotatably mounted on the support and close to the glue outlet; a glue gate is located inside the cavity, one end of which extends to the top of the melt box; a needle valve is provided inside the cavity, the needle valve is connected to two glue injection elbows, and the axes of the two glue injection elbows are perpendicular to each other, the glue injection elbows are used to connect to an external glue dispensing device.

[0011] In some embodiments, the inside of the coating shaft is provided with a first heating rod for heating; the inside of the melt box is provided with a second heating rod for heating the glue.

[0012] In some embodiments, the adhesive application mechanism further includes a guide assembly for adjusting the vertical distance between the sheet material and the adhesive application shaft.

[0013] In some embodiments, the glue application mechanism further includes a glue-leading plate, a glue-receiving box, and a melt-box cleaning structure; the glue-leading plate is inclinedly disposed below the glue application shaft, with its lower end extending directly above the opening of the glue-receiving box, for guiding the glue residue on the glue application shaft into the glue-receiving box; the melt-box cleaning structure is used to clean the inside of the melt-box.

[0014] The technical solution provided by this utility model can include the following beneficial effects: When applying the technical solution of this utility model, the annular scale markings on the rotating ring cooperate with the indicator on the pointing seat to intuitively display the adjustment amount of the glue gate opening. Operators can accurately read the adjustment parameters without relying on experience or additional tools, greatly reducing the difficulty of debugging. Compared with the traditional adjustment method that relies on feel or repeated trial and error, this solution transforms the glue dispensing adjustment from blind adjustment to visual and controllable adjustment, which can significantly reduce the adjustment time per instance. It is especially suitable for continuous production scenarios with multiple batches and multiple specifications of boards, effectively improving the efficiency of production line changeover. Attached Figure Description

[0015] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0016] Figure 1 This is a schematic diagram of the adhesive application mechanism shown in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the adjustment component shown in an embodiment of the present invention; Figure 3 This is a side view of the adjustment component shown in an embodiment of the present invention; Figure 4 This is a top view of the adhesive application mechanism shown in an embodiment of the present invention; Figure 5 This is a schematic diagram showing the closed state of the glued door according to an embodiment of the present invention; Figure 6 This is another top view of the adhesive application mechanism shown in this embodiment of the utility model; Figure 7 This is a schematic diagram showing the open state of the glued door according to an embodiment of the present invention; Figure 8 This is a schematic diagram illustrating the cooperation between the limiting mechanism and the limiting screw in an embodiment of this utility model; Figure 9 This is an exploded view of the adhesive application mechanism shown in an embodiment of the present invention; Figure 10 This is another exploded view of the adhesive coating mechanism shown in an embodiment of the present invention.

[0017] Figure label: 1. Glue application shaft; 2. Glue gate; 3. Transmission rod; 4. Power source; 5. Pointing seat; 6. Rotary ring; 7. Transmission component; 8. Mating part; 9. Locking component; 10. Spring; 11. Limiting mechanism; 12. Limiting screw; 13. U-shaped connecting block; 14. Optical shaft; 15. Melting box; 16. Support; 17. Needle valve; 18. Glue injection elbow; 19. First heating rod; 20. Second heating rod; 21. Guide assembly; 22. Glue drawing plate. Detailed Implementation

[0018] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0019] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0020] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] As a core material in furniture production, the quality of edge banding for engineered wood directly affects the product's appearance and lifespan. During the edge banding process, the amount of glue applied must be precisely controlled: too little glue will result in weak adhesion of the edge banding and the board becoming susceptible to moisture damage; too much glue will cause glue overflow and waste, and exposed glue lines will affect the aesthetics. Currently, the glue dispensing amount of edge banding machines is determined by the opening of the glue gate. Traditional glue dispensing mechanisms rely on manual visual judgment of the glue gate's opening and closing, requiring repeated fine-tuning of the limit device to find the appropriate glue dispensing amount through trial and error. This adjustment process is blind, inefficient, and its accuracy is significantly affected by the operator's experience, making it difficult to guarantee consistency in mass production.

[0022] To address the aforementioned issues, this utility model provides a glue application mechanism that enables visual adjustment of the glue gate 2 opening degree through the cooperation of the annular scale markings on the rotating ring 6 and the indicator part on the pointing seat 5. This allows for quick and precise manual control of the glue dispensing amount, improving adjustment efficiency and accuracy.

[0023] The technical solutions of the embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0024] like Figures 1 to 10 As shown, this utility model proposes an adhesive application mechanism, including an adhesive application component and an adjustment component.

[0025] The glue application assembly can be implemented with reference to existing technologies. To facilitate understanding of the cooperation between the adjustment assembly and the glue application assembly, the following is a brief description of the glue application shaft 1, glue gate 2, transmission rod 3, and power source 4. The glue application shaft 1 is used to carry and transport the glue. Its surface is machined with a microgroove structure to precisely control the glue's flowability and coating uniformity. The glue gate 2 is arranged parallel to the glue application shaft 1, and the two work together to form a glue outlet gap. The opening degree of the glue gate 2 directly determines the size of the glue outlet gap, thereby controlling the amount of glue applied. One end of the transmission rod 3 is connected to the glue gate 2, and the other end is connected to the output end of the power source 4. It is used to convert the output of the power source 4 into linear displacement of the glue gate 2, which can be achieved through a rigid connecting rod or a flexible transmission belt. The power source 4 can be a motor, cylinder, or other drive device that can provide linear / rotational motion. During the edge sealing operation, the power source 4 continuously outputs power to ensure that the glue outlet gap remains open, thereby realizing the glue application work on the edge sealing tape.

[0026] An adjustment component is installed on the top end face of the glue application component to achieve precise and visual adjustment of the glue dispensing gap. Under the action of the power source 4, the adjustment component keeps the glue dispensing gap of the glue gate 2 within the target value. The adjustment component includes a guide seat 5, a rotating ring 6, and a transmission component 7. The guide seat 5 serves as the mounting base for the rotating ring 6 and can be fixed to the top end face of the glue application component by bolts or quickly disassembled by a snap-fit ​​structure. The guide seat 5 has an indicator (such as a fixed pointer, electronic display screen, etc.) corresponding to the annular scale markings of the rotating ring 6, so that the operator can read the current adjustment parameters in real time. The rotating ring 6 can be made of aluminum alloy, with annular scale markings laser-engraved on its outer circumference and the scale lines filled with black ink. In some embodiments, to ensure smooth adjustment, the rotating ring 6 can cooperate with the guide seat 5 through a bearing. The scale values ​​of the annular scale markings can be set according to actual needs. For example, the main scale of the annular scale markings is set to 0.2mm per division, for a total of 10 large divisions, and the secondary scale is set to 0.02mm per division, for a total of 10 small divisions. The locking element 9 passes through the internal mating part 8 of the rotating ring 6 and abuts against the outer periphery of the transmission element 7, used to lock the position of the transmission element 7. After the locking element 9 locks the rotating ring 6, the transmission element 7 and the mating part 8, the three form a rigid whole. Rotating the rotating ring 6 can adjust the size of the glue dispensing gap, and the threaded engagement between the transmission element 7 and the guide seat 5 achieves self-locking. After releasing the locking element 9, the transmission element can be rotated independently, thereby realizing the calibration of the glue dispensing gap. The mating part 8 is an integrated structure inside the rotating ring 6 (such as an embedded sleeve or an external flange), and can be selected to use a clearance fit or an interference fit with the transmission element 7 according to the accuracy requirements. The transmission element 7 is made of high-strength steel alloy and can be a linear transmission component such as a stud or rack. One end of it passes through the guide seat 5 and abuts against the transmission rod 3, and the other end mates with the mating part 8.

[0027] When rotating the ring 6, the locking component 9 drives the transmission component 7 to move axially, thereby driving the transmission rod 3 to move, ultimately achieving precise adjustment of the opening of the glue gate 2; at the same time, the transmission component 7 can limit the relative position of the transmission rod 3, so that when the power source 4 pushes the transmission rod 3, the glue discharge gap is stably controlled at the target value.

[0028] Please see Figure 5 and Figure 7 The adjustment process of the adjustment component of this utility model can be divided into initial state, usage state, and calibration, as detailed below: Initial setup is applicable before the glue application mechanism is used for the first time, or before changing the type of glue or the size of the board. The specific steps are as follows: 1) Before adjustment, the glue door 2 is in the closed position by default (i.e., the glue door 2 is tightly fitted with the glue application shaft 1), and the glue discharge gap is 0mm in the reference state; the annular scale mark of the rotating ring 6 is set to zero, the indicator part of the pointing seat 5 is aligned with the "0" scale line of the rotating ring 6, and the locking part 9 is in the pre-tightened state to temporarily fix the position of the transmission part 7.

[0029] 2) According to the preset glue dispensing volume requirement (such as a target glue dispensing gap of 0.20mm), the operator rotates the rotating ring 6 clockwise; through the circumferential linkage between the locking part 9 and the transmission part 7, the rotating ring 6 drives the transmission part 7 to rotate synchronously. Since the transmission part 7 and the pointing seat 5 are threadedly engaged, the transmission part 7 moves axially towards the transmission rod 3, thereby pushing the transmission rod 3 to drive the glue gate 2 away from the glue application shaft 1, increasing the glue dispensing gap.

[0030] 3) When the indicator part of the pointer seat 5 is aligned with the target scale (such as 0.20mm) marked on the ring 6, stop rotating the ring 6 to complete the preset adjustment of the initial glue dispensing gap.

[0031] It should be noted that the 0mm dispensing gap described in this invention is not an absolute zero gap in a physical sense, but rather refers to a critical state where the glue gate 2 and the glue application shaft 1 are so closely fitted that effective glue dispensing is impossible. In practical applications, due to the influence of process parameters such as glue viscosity and temperature, different types of glue have different critical gap values ​​for reaching the point where glue dispensing is impossible (for example, high-viscosity glue cannot flow at a small gap, while low-viscosity glue requires an even smaller gap to block dispensing). To facilitate a unified description and quantitative understanding of the adjustment amount of the dispensing gap, this invention defines the aforementioned critical state of no glue dispensing as a dispensing gap of 0mm, as the reference zero point for subsequent adjustment scale markings.

[0032] The status adjustment method is used during the glue application process to dynamically adjust the glue dispensing amount based on process parameters such as board thickness and glue application width, ensuring matching with real-time working conditions. The specific steps are as follows: 1) Before adjustment, the glue gate 2 is in the working position (e.g., the current glue dispensing gap is 0.15mm), the indicator points to the corresponding scale (0.15mm) on the rotating ring 6, and the locking part 9 is in the locked state to lock the position of the transmission part 7 and maintain the current glue dispensing gap stable.

[0033] 2) When the working conditions change (such as changing the edge banding tape specification, the glue dispensing gap needs to be reduced from 0.15mm to 0.1mm), the operator rotates the rotating ring 6 counterclockwise; through the circumferential linkage of the locking part 9, the rotating ring 6 drives the transmission part 7 to rotate in the opposite direction, and the transmission part 7 moves axially away from the transmission rod 3, pushing the transmission rod 3 to drive the glue gate 2 to move closer to the glue application shaft 1, thereby reducing the glue dispensing gap.

[0034] 3) When the indicator is aligned with the target scale (e.g., 0.1mm) of the rotating ring 6, stop rotating the rotating ring 6 to complete the dynamic adjustment of the glue dispensing gap and ensure that the glue dispensing volume matches the new working condition.

[0035] The calibration process is used to eliminate adjustment errors caused by mechanical transmission backlash and cumulative component deformation after long-term use. Adjustment accuracy is ensured by resetting the glue dispensing gap reference zero point. The specific steps are as follows: 1) Start the power source 4, drive the transmission rod 3 to move the glue door 2 to the initial closed position (i.e., the critical state where the glue door 2 and the glue application shaft 1 are tightly attached), and keep the glue door 2 in a stable and taut state.

[0036] 2) Loosen the locking part 9 and manually rotate the transmission part 7 to move it axially until the transmission part 7 abuts against the transmission rod 3 and the transmission rod 3 can no longer drive the glue door 2 to move towards the glue application shaft 1 (that is, the transmission part 7 and the transmission rod 3 form a rigid contact).

[0037] 3) Rotate the rotating ring 6 to precisely align the "0" mark on the ring scale with the indicator part of the pointing seat 5, and then tighten the locking part 9 to fix the position of the transmission part 7 to complete the reference zero point calibration.

[0038] In the above adjustment process, the core mechanical structures such as the linkage between the rotating ring 6 and the transmission component 7, the threaded engagement between the transmission component 7 and the pointing seat 5, and the locking function of the locking component 9 are all adapted to the main structure of the glue application assembly to ensure the stability and accuracy of the adjustment process.

[0039] Through the collaborative design of the aforementioned core mechanical structures, this utility model solves the problem of blind adjustment and error accumulation caused by the reliance on manual visual inspection or experience to estimate the adjustment amount in traditional glue application mechanisms. The rotating ring 6, in conjunction with the annular scale markings, enables visualized and quantitative reading of the adjustment amount. The operator can intuitively obtain the current glue dispensing gap parameter by observing the real-time correspondence between the indicator on the pointer seat 5 and the scale on the rotating ring 6, completely avoiding adjustment deviations caused by relying solely on experience. Simultaneously, the threaded fit between the transmission component 7 and the pointer seat 5 converts the rotational motion of the rotating ring 6 into axial linear displacement of the transmission component 7, achieving precise micron-level control of the adjustment amount. Combined with the bearing connection between the rotating ring 6 and the pointer seat 5 and the rigid locking of the locking component 9, the linear continuity and parameter repeatability of the adjustment process are ensured, effectively improving the efficiency of glue application adjustment while guaranteeing high consistency of glue application parameters in mass production. This addresses the core problems of low precision, poor efficiency, and insufficient consistency in traditional adjustment methods at the mechanical structure level.

[0040] To further optimize the axial movement smoothness and adjustment accuracy of the transmission component 7, this invention includes a compression spring 10 fitted around the outer periphery of the transmission component 7. Its axial ends abut against the limiting end face of the mating part 8 and the outer wall surface of the pointing seat 5, respectively, forming a closed elastic buffer system. When the locking component 9 pushes the transmission component 7 axially, the spring 10 absorbs the instantaneous impact force through elastic deformation, preventing jump displacement of the transmission component 7 caused by sudden changes in mechanical transmission clearance (such as thread fit clearance) or frictional resistance, ensuring the continuity and linear accuracy of the opening adjustment of the door 2. In the locked state, the spring 10 is in a compressed state and generates a constant preload, creating a rigid fit between the transmission component 7, the locking component 9, and the transmission rod 3. This effectively suppresses loosening caused by thermal expansion / contraction of components due to external vibration or temperature changes, ensuring the stability of the door 2 opening during long-term use. Furthermore, the elastic energy storage characteristics of the spring 10 can absorb sudden external interference forces (such as the impact force from misoperation during adjustment), reducing impact damage to the transmission system and further improving the overall adjustment accuracy. For example, the spring 10 can be made of high-strength spring steel, and the spring 10 and the transmission component 7 are fitted with a clearance to avoid friction and jamming between the spring 10 and the outer periphery of the transmission component 7, thus ensuring smooth axial extension and contraction.

[0041] Furthermore, the rotating ring 6 is provided with a first groove, the mating part 8 is a sleeve, the transmission component 7 is a stud, and the locking component 9 is a nut screw; the nut screw is housed in the first groove, and the nut screw is threadedly connected to the sleeve and abuts against the outer periphery of the stud.

[0042] Specifically, the first groove is formed on the outer circumference of the rotating ring 6 through machining (such as milling or turning), forming a ring or partially arc-shaped groove structure. The first groove is used to place the set screw, ensuring that the set screw can move synchronously with the rotating ring 6 in the circumferential direction when the rotating ring 6 rotates, thereby driving the stud to rotate. The sleeve is a hollow cylindrical structure, and its axially penetrating inner hole fits tightly with the outer circumference of the stud. The inner wall surface is precision ground to reduce the relative frictional resistance with the stud. The sleeve sidewall is machined with an axial threaded hole corresponding to the position of the first groove of the rotating ring 6. After being threadedly connected to the set screw, it passes through and abuts against the outer circumference of the stud, realizing the circumferential force transmission between the rotating ring 6 and the stud. The outer circumference of the stud is machined with a standard metric thread, or a higher pitch accuracy grade can be selected according to the adjustment accuracy requirements. The thread profile is triangular, and the surface is oxidized (such as hard anodizing) to improve wear resistance. When the rotating ring 6 is rotated, the set screw in the first groove rotates synchronously circumferentially with the rotating ring 6. The friction between the flat end of the set screw and the outer circumference of the stud drives the stud to rotate. Since the stud and the guide seat 5 are threadedly engaged, the rotational motion is converted into the axial displacement of the stud, which in turn pushes the transmission rod 3 to adjust the opening of the door 2. The guide support of the sleeve ensures that the axial movement of the stud is free from wobble, and the positioning engagement between the first groove and the through hole ensures the stability of the transmission path, together achieving precise transmission of the adjustment component.

[0043] Furthermore, the lead of the stud is 0.5~2mm. The stud can be made of 40Cr alloy steel, and the internal thread of the stud and the guide seat 5 adopts an H7 / g6 clearance fit to ensure smooth axial movement without jamming. For example, the lead can be set to 0.5mm, 1mm, 1.5mm, 1.75mm and 2mm.

[0044] In this embodiment, the middle part of the transmission rod is rigidly connected to the glue gate through a hexagonal through-hole, so the rotation center of the connecting rod is the central axis of the hexagonal through-hole. The stud abuts against one end of the connecting rod. When the stud moves axially, it pushes the connecting rod to rotate around the central axis, thereby causing the glue gate to move in an arc around this axis, changing the glue dispensing gap between the glue gate and the glue application shaft. That is to say, the connecting rod, the point of action of the stud, and the trajectory of the glue gate form a virtual triangle: the axial movement (linear displacement) of the stud is one right-angled side of the triangle, and the rotation radius of the connecting rod (the distance from the point of action of the stud to the central axis) is the other right-angled side; the arc length of the glue gate (corresponding to the change in glue dispensing gap) is proportional to the rotation angle. It can be seen that the distance from the point of action of the stud to the rotation center of the connecting rod is L1 (lever arm), and the distance from the edge of the glue gate to the rotation center is L2 (resistance arm). According to the lever principle, the relationship between the linear displacement S of the stud and the arc length displacement s of the glue gate is S / s = L1 / L2. Meanwhile, the arc length displacement s of the glue gate is approximately equal to the change in the glue outlet gap, therefore the transmission ratio i = S / Δ 间隙 =L1 / L2. For example, if the lead is set to 1.75mm and the dispensing gap is set to 0.24mm for one rotation, then the lever arm L1 of the connecting rod is approximately 7 times the resistance arm L2. That is, the movement of the stud, through the lever effect, causes a smaller displacement of the glue gate to correspond to a larger axial movement of the stud, thereby achieving high-precision adjustment. Of course, when the lead of the transmission component 3 is 2mm, its dispensing gap can also be set to 0.24mm, which only requires adjusting the length relationship between the lever arm and the resistance arm.

[0045] Furthermore, the adjustment assembly also includes a limiting mechanism 11 and a limiting screw 12. The limiting mechanism 11 is located on the side of the transmission rod 3 facing away from the transmission component 7, and the limiting screw 12 is located on the adhesive application assembly, with the limiting screw 12 opposite to the limiting mechanism 11, to limit excessive movement of the transmission rod 3. The limiting mechanism 11, located on the side of the transmission rod 3 facing away from the transmission component 7, allows the limiting mechanism 11 to contact the limiting screw 12 promptly when the transmission rod 3 rotates to its limit position in a specific direction, thereby triggering the limiting action. The limiting screw 12, fixed to the adhesive application assembly, provides a stable mechanical reference point, ensuring that the limiting action is not affected by external vibration or adjustment forces. The precise alignment of both on the rotation path of the transmission rod 3 ensures that the limiting action can reliably occur according to changes in the rotation angle, preventing the transmission rod 3 from exceeding the set position. Through this simple physical contact mechanism, the rotation range of the transmission rod 3 is limited to a reasonable range, fundamentally avoiding adhesive application quality problems and component damage caused by excessive rotation.

[0046] Furthermore, the power source 4 is a cylinder, and the transmission rod 3 is a connecting rod; the output shaft of the cylinder is provided with a U-shaped connecting block 13, and the U-shaped connecting block 13 is provided with an optical shaft 14; one end of the connecting rod is provided with a second groove, and the optical shaft 14 is inserted into the second groove; the middle of the connecting rod is provided with a hexagonal through hole for the glue door 2 to pass through, and one end of the glue door 2 is a prism structure adapted to the hexagonal through hole; so that the glue door 2 moves synchronously with the connecting rod; when the cylinder output shaft extends or retracts, it drives the connecting rod to rotate around the central axis of the hexagonal through hole. The connecting rod is provided with a hexagonal through hole for the glue door 2 to pass through, and the hexagonal shape matches the glue door 2, which can prevent relative rotation between the two during transmission, ensure that the opening change of the glue door 2 strictly corresponds to the rotation angle of the connecting rod, and eliminate adjustment distortion. The cylinder output shaft extension and retraction directly drives the connecting rod to rotate around the central axis of the hexagonal through hole. This direct transmission method avoids the accumulation of errors in the intermediate links, realizes linear and stepless fine adjustment of the glue gate 2 opening, significantly improves adjustment efficiency and accuracy, and frees the glue application amount control from the dependence on manual trial and error.

[0047] Furthermore, the glue application mechanism also includes a melt box 15 and a support 16. The melt box 15 has a cavity, with a glue outlet formed on one side of the cavity. The support 16 is located at the bottom of the melt box 15, and the glue application shaft 1 is rotatably mounted on the support 16 and close to the glue outlet. The glue gate 2 is located inside the cavity, with one end extending to the outside of the melt box 15 for transmission connection with the transmission rod 3. A needle valve 17 is provided inside the cavity, connecting two glue injection elbows 18. The two glue injection elbows 18 are located on the melt box 15, and their axes are perpendicular to each other. The glue injection elbows 18 are used to connect to an external glue dispensing device. The two glue injection elbows 18 can be connected to glue injection tubes of different glues respectively. The glue injection elbows 18 are also equipped with a one-way valve, which allows glue to flow to the needle valve 17 during glue injection and prevents glue backflow when glue injection stops. Opening and closing the needle valve 17 enables glue dispensing. When switching adhesives, simply control the adhesive flow from the source of the dispensing tube.

[0048] Furthermore, the inside of the glue-applying shaft 1 is provided with a first heating rod 19 for heating; the inside of the melt box 15 is provided with a second heating rod 20 for heating the glue.

[0049] Furthermore, the adhesive application mechanism also includes a guide component 21, which is used to adjust the vertical distance between the plate and the adhesive application shaft 1.

[0050] Furthermore, the glue application mechanism also includes a glue-leading plate 22, a glue-receiving box, and a cleaning structure; the glue-leading plate 22 is inclinedly disposed below the glue application shaft 1, with its lower end extending directly above the opening of the glue-receiving box, for guiding the glue residue on the glue application shaft 1 into the glue-receiving box; the cleaning structure is used to clean the inside of the melt box 15.

[0051] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A glue-applying mechanism, characterized in that, include: The glue application assembly includes a glue application shaft (1), a glue gate (2), a transmission rod (3), and a power source (4); the glue gate (2) cooperates with the glue application shaft (1) to form a glue dispensing gap, one end of the transmission rod (3) is connected to the glue gate (2) and the other end is connected to the output end of the power source (4); The adjustment assembly includes a pointing seat (5), a rotating ring (6), and a transmission component (7); the pointing seat (5) is disposed on the adhesive application assembly, the rotating ring (6) is rotatably disposed on the pointing seat (5), and the rotating ring (6) is provided with annular scale markings, and the pointing seat (5) is provided with indicator markings; The rotating ring (6) has a mating part (8) inside, the transmission member (7) passes through the mating part (8) and is threadedly engaged with the pointing seat (5), and one end of the transmission member (7) passes through the pointing seat (5) and abuts against the transmission rod (3); The rotating ring (6) is provided with a locking member (9), which passes through the mating part (8) and abuts against the outer periphery of the transmission member (7).

2. The adhesive application mechanism according to claim 1, characterized in that, A spring (10) is sleeved on the outer periphery of the transmission component (7). One end of the spring (10) abuts against the end of the mating part (8), and the other end abuts against the outer wall of the guide seat (5).

3. The adhesive application mechanism according to claim 1, characterized in that, The rotating ring (6) is provided with a first groove, the mating part (8) is a sleeve, the transmission part (7) is a stud or a screw, and the locking part (9) is a screw set screw; the screw set screw is housed in the first groove, and the screw set screw is threadedly connected to the sleeve and abuts against the outer periphery of the stud.

4. The adhesive application mechanism according to claim 3, characterized in that, The lead of the stud is 0.5 mm to 2 mm.

5. The adhesive application mechanism according to claim 1, characterized in that, The adjustment assembly also includes a limit switch (11) and a limit screw (12). The limit switch (11) is located on the side of the transmission rod (3) away from the transmission component (7). The limit screw (12) is located on the glue application assembly and is opposite to the limit switch (11).

6. The adhesive application mechanism according to claim 1, characterized in that, The power source (4) is a cylinder, and the transmission rod (3) is a connecting rod; the output shaft of the cylinder is provided with a U-shaped connecting block (13), and the U-shaped connecting block (13) is provided with an optical shaft (14); one end of the connecting rod is provided with a second groove, and the optical shaft (14) is inserted into the second groove; the middle part of the connecting rod is provided with a hexagonal through hole for the glue door (2) to pass through, and one end of the glue door (2) is a prism structure adapted to the hexagonal through hole; when the cylinder output shaft extends and retracts, it drives the connecting rod to rotate around the central axis of the hexagonal through hole.

7. The adhesive application mechanism according to claim 1, characterized in that, The glue coating mechanism also includes a melt box (15) and a support (16); the melt box (15) has a cavity, and a glue outlet is formed on one side of the cavity; the support (16) is located at the bottom of the melt box (15); the glue coating shaft (1) is rotatably mounted on the support (16) and close to the glue outlet; the glue door (2) is located in the cavity, and one end of the glue door (2) extends to the top of the melt box (15); a needle valve (17) is provided in the cavity, and the needle valve (17) is connected to two glue injection elbows (18), and the axes of the two glue injection elbows (18) are perpendicular to each other; the glue injection elbows (18) are used to connect to an external glue dispensing device.

8. The adhesive application mechanism according to claim 7, characterized in that, The inside of the glue-applying shaft (1) is provided with a first heating rod (19) for heating; the inside of the melt box (15) is provided with a second heating rod (20) for heating the glue.

9. The adhesive application mechanism according to claim 1, characterized in that, The adhesive application mechanism also includes a guide assembly (21), which is used to adjust the vertical distance between the plate and the adhesive application shaft (1).

10. The adhesive application mechanism according to claim 9, characterized in that, The glue application mechanism also includes a glue-leading plate (22), a glue-receiving box, and a cleaning structure; the glue-leading plate (22) is inclined below the glue-applying shaft (1), and its lower end extends directly above the opening of the glue-receiving box, for guiding the glue residue on the glue-applying shaft (1) into the glue-receiving box; the cleaning structure is used to clean the inside of the melt box (15).

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