Rotary glue gun with multiple glue nozzles

Abstract

The invention provides a rotary multi-glue-nozzle glue gun, which relates to the technical field of rotary glue guns, and comprises a fixed shell with a connecting end, and a rotating mechanism, a glue nozzle supporting part and a multi-glue-nozzle assembly which are sequentially connected and synchronously rotate, the fixed shell is provided with a sizing material inlet and an air path interface; the rotating mechanism is rotationally connected into the fixed shell, the multi-glue-nozzle assembly comprises a plurality of glue nozzles arranged on the glue nozzle supporting part, and each glue nozzle is connected with a corresponding glue outlet switch assembly in a one-to-one mode, so that the glue outlet switch assembly can control the glue outlet switch state of each glue nozzle. The rotating mechanism can drive the multi-glue-nozzle assembly to rotate at any angle and can easily cope with various complex curved surfaces.

Description

Technical Field

[0001] The invention relates to the technical field of rotary glue guns, in particular to a rotary glue gun with multiple glue nozzles. Background Art

[0002] In modern industrial production, especially in automotive body structural sealing, aerospace composite seam bonding, rail transit vehicle assembly, and appliance sealing strip coating, the gluing process has a direct impact on the product's sealing performance, structural strength, corrosion protection, and aesthetics. With the acceleration of production pace and the increasing complexity of product forms, higher requirements are being placed on the flexibility, precision, and reliability of gluing equipment.

[0003] The glue discharge direction of traditional single glue nozzles or fixed-angle glue guns can only be changed by manual adjustment or relying on a single-axis rotating device. When faced with complex workpieces such as deep grooves, high-curvature surfaces, and staggered structures, it is difficult to achieve all-round uniform glue coating, and defects such as missing coating and glue line deviation are prone to occur. Some existing rotary glue guns achieve nozzle angle changes by driving the entire gun body to rotate, but the feed hose, air pipe and cable rotate with the body, which is very easy to get entangled, bent or pulled, resulting in glue path blockage, unstable air pressure and even line damage, affecting production continuity and safety. More importantly, on production lines that need to quickly switch between different glue types (such as single-component / two-component glue, mixed glue in different proportions) or different glue discharge characteristics (such as dispensing, wire drawing), the single glue nozzle structure requires frequent replacement of the gun head or the entire gun, which is a cumbersome process and long downtime.

[0004] In summary, the existing technology is still unable to take into account the comprehensive requirements of multi-dimensional rotation flexibility, independent precision control of the nozzle, anti-blocking and anti-curing, pipeline anti-entanglement and compact structure. The industry urgently needs a new type of 3D rotary glue gun with novel structure, efficient control and strong adaptability to break through these bottlenecks. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of the existing technology and provides a rotary multi-nozzle glue gun, which mainly solves the following technical problems: the problem of entanglement and damage of the feed pipeline caused by the overall rotation of the gun body of the existing rotary glue gun; and the problem of insufficient flexibility in gluing and low efficiency in switching working conditions of the single glue nozzle structure when facing complex workpieces.

[0006] To achieve the above object, the present invention provides a rotary multi-nozzle glue gun, comprising a fixed housing having a connection end, and further comprising a rotating mechanism, a nozzle support portion, and a multi-nozzle assembly that are sequentially connected and rotate synchronously;

[0007] The fixed housing has a rubber inlet and an air path interface;

[0008] The rotating mechanism is rotatably connected in the fixed housing. The rotating mechanism includes a glue path rotating shaft and a gas path rotating shaft. The glue path rotating shaft is connected to the glue inlet, and the gas path rotating shaft is connected to the gas path interface. A plurality of glue discharge switch components are arranged in the gas path rotating shaft.

[0009] The multi-nozzle assembly includes a plurality of nozzles arranged on a nozzle support part. The nozzle support part is provided with a glue hole for connecting the glue path rotating shaft and the glue nozzle, and a matching hole for connecting the air path rotating shaft and the nozzle. Each glue nozzle is connected to a corresponding glue discharge switch assembly so that the glue discharge switch assembly can control the glue discharge switch state of each glue nozzle.

[0010] Furthermore, the glue path rotating shaft is a hollow structure, forming a through glue channel, the glue channel is connected to the glue inlet and is connected to each glue nozzle;

[0011] The air path rotating shaft is a hollow structure, forming a penetrating air path channel, and the air path channel is connected to the air path interface to provide each glue discharge switch component with a driving force to control the corresponding glue nozzle glue discharge switch state.

[0012] Furthermore, the glue outlet switch assembly includes a first pneumatic piston and a push rod connected thereto, the push rod having a disengaged state and an abutted state. When in the disengaged state, the push rod is disengaged from the glue outlet of the glue nozzle. When in the abutted state, the push rod abuts against the glue outlet of the glue nozzle to seal the glue outlet of the glue nozzle.

[0013] Furthermore, there are two nozzles, and the angle between the two nozzles is 90 degrees;

[0014] The multi-nozzle assembly further comprises a special-shaped nozzle, which comprises a curved section, and a flat outlet is formed at the end of the curved section.

[0015] Furthermore, the rotating mechanism is connected to an external driving source, which is any one of an electric motor, a pneumatic motor or a hydraulic motor.

[0016] Furthermore, it also includes a circulation valve assembly, which is arranged on the side wall of the fixed housing and is connected to the glue path rotating shaft, and is used to realize the backflow circulation of the glue when the glue discharge is closed;

[0017] The circulation valve assembly includes a valve body, a second pneumatic piston and a driving element. The driving element can drive the second pneumatic piston to reciprocate axially in the valve body to control the circulation of the rubber material. The driving element is a solenoid valve and / or a pneumatic valve.

[0018] The valve body is provided with a circulation inlet and a circulation outlet both of which are communicated with the rubber material inlet.

[0019] Beneficial effects:

[0020] Compared with the prior art, the present invention has the following significant beneficial effects:

[0021] 1. Completely Eliminate Pipeline Tangle: This invention integrates the rubber inlet and air interface within a fixed housing, transmitting power via an internal rotating shaft. This eliminates the need for external pipes such as feed hoses, air pipes, and cables to rotate with the gun head. This "dynamic and static separation" design fundamentally eliminates the risks of pipeline entanglement, bending, and wear, significantly improving equipment reliability and production safety.

[0022] 2. Achieve highly flexible three-dimensional gluing: The rotating mechanism can drive the multi-nozzle assembly to rotate 360 ​​degrees or at any angle. Combined with external motion mechanisms such as robot arms, it can easily cope with various complex curved surfaces, deep grooves, corners and other difficult gluing trajectories, achieving all-round, no-dead-angle precision gluing.

[0023] 3. Improved production efficiency and adaptability: The multi-nozzle assembly integrates multiple nozzles of varying angles and shapes. Programmable, it enables rapid switching during production with zero downtime, eliminating the need for manual nozzle changes. The dispensing status of each nozzle can be independently controlled to meet diverse process requirements, including dispensing, line gluing, and coating, significantly enhancing the flexibility and efficiency of the production line.

[0024] 4. Precise control to prevent clogging: Each nozzle is equipped with an independent, pneumatic piston-driven ejector switch assembly, which responds quickly and cuts off the glue cleanly, effectively avoiding stringing and dripping. Furthermore, the added circulation valve assembly maintains the fluidity of the rubber compound when not in operation, effectively preventing high-viscosity or easily solidifying rubber compounds from clogging the nozzle body and reducing maintenance workload.

[0025] 5. Compact structure and high integration: The rubber and gas circuit rotation mechanisms are integrated in parallel in the fixed housing, which has a compact structure, reduces the weight and inertia of the moving parts, and is conducive to achieving high-speed and high-precision motion control. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0028] Figure 2 A sectional view of a three-dimensional structure of an embodiment of the present invention;

[0029] Figure 3 Schematic diagram of the structure of a circulation valve assembly in one embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 10. Fixed housing; 11. Rubber material inlet; 12. Air circuit interface; 13. Connection end;

[0032] 20. Rotating mechanism; 21. Glue circuit rotating axis; 22. Gas circuit rotating axis; 23. Sealing structure;

[0033] 30. Nozzle support;

[0034] 40. Multiple glue nozzle assembly; 41. Glue nozzle; 42. Glue dispensing switch assembly; 421. First pneumatic piston; 422. Ejector rod; 43. Special-shaped glue nozzle;

[0035] 50. Circulation valve assembly; 51. Valve body; 52. Second pneumatic piston; 53. Driving element. DETAILED DESCRIPTION

[0036] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. In order to better illustrate this embodiment, certain components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual size of the product.

[0037] It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The technical solution of the present invention will be further described below in conjunction with the drawings and embodiments.

[0038] Example 1

[0039] See also Figures 1 to 3 The present invention provides a rotary multi-nozzle glue gun, which mainly comprises a fixed housing 10, a rotating mechanism 20 disposed inside the fixed housing 10, a nozzle support 30 mounted at the output end of the rotating mechanism 20, and a multi-nozzle assembly 40 fixed to the nozzle support 30. The glue gun is connected to a robot arm or other automated equipment via a connection end 13 at the top.

[0040] Fixed housing 10: Figure 1 and Figure 2 As shown, the stationary housing 10 serves as the base of the glue gun and remains stationary during operation. It features a glue inlet 11 and an air port 12. External glue and air supply lines connect to these ports, respectively. Since the housing 10 does not rotate, external lines are prevented from becoming entangled. Complex flow channels are machined into the housing 10, directing the glue and compressed air to the corresponding inputs of the rotating mechanism 20.

[0041] Rotating mechanism 20: This is the core component that enables nozzle rotation while keeping the pipeline stationary. It includes a glue line rotating shaft 21 and a gas line rotating shaft 22. In this embodiment, these two rotating shafts are mounted parallel to each other in the bearing seat of the fixed housing 10.

[0042] The glue path rotating shaft 21 is a hollow structure, and a glue material channel is formed inside the glue path rotating shaft 21. One end of the channel is connected to the glue path channel in the fixed housing 10 through a rotating seal, and the other end extends out of the fixed housing 10 and is connected to the glue nozzle support portion 30.

[0043] The air path rotating shaft 22 is also hollow, forming an air path within it. One end of this path is connected to the air path within the fixed housing 10 through a rotating seal, while the other end delivers compressed air to the various glue dispensing switch assemblies 42 of the multi-glue nozzle assembly 40 through internal pipes or channels.

[0044] A high-performance sealing structure 23 (such as a rotating Gly ring, an O-ring combination, etc.) is provided between the rubber circuit rotating shaft 21 and the gas circuit rotating shaft 22, as well as between them and the fixed housing 10, to ensure that there is no leakage or crosstalk between the rubber circuit and the gas circuit under high pressure.

[0045] The rotating mechanism 20 is connected to an external driving source (such as Figure 1 The servo motor shown in the figure is connected to the nozzle support 30 and the multi-nozzle assembly 40, which is powered by an external driving source to drive the entire rotating mechanism 20 (the glue path rotating shaft 21 and the gas path rotating shaft 22 are usually rotated in conjunction with each other through synchronous transmission structures such as gears), thereby driving the nozzle support 30 and the multi-nozzle assembly 40 to rotate at a precise angle.

[0046] Nozzle support 30 and multiple nozzle assembly 40: Figure 1 and Figure 2 As shown, the nozzle support 30 is a disc-shaped or block-shaped component, which is firmly mounted on the output end of the glue path rotating shaft 21 through multiple fasteners (such as high-strength screws). The multi-nozzle assembly 40 is mounted on the nozzle support 30.

[0047] The multi-nozzle assembly 40 includes multiple (two in this embodiment) nozzles 41 spaced apart along the circumference of the nozzle support 30. In this embodiment, the angle between the two nozzles 41 is 90 degrees, facilitating gluing of the workpiece's inner and outer right angles. One or more of the nozzles can be shaped like a nozzle 43, for example, with a curved section and a flat outlet, suitable for coating in specialized locations.

[0048] The base of each glue nozzle 41 is connected to the glue channel from the glue path rotating shaft 21.

[0049] Each nozzle 41 is equipped with an independent dispensing switch assembly 42. The core of this mechanism is a first pneumatic piston 421 and a connected push rod 422. Compressed air from the air circuit rotating shaft 22 is directed to one or both sides of the first pneumatic piston 421 through a control valve (not shown). The piston drives the push rod 422 in rapid reciprocating motion along the axis of the nozzle 41, thereby precisely opening and closing the dispensing port at the nozzle end. Because each control mechanism is independent, the upper-level control system can independently control the dispensing and stopping of any nozzle, enabling flexible process switching.

[0050] Circulation valve assembly 50: To prevent the glue from solidifying, a circulation valve assembly 50 is integrated into the side wall of the fixed housing 10. The assembly's inlet is connected to the glue circuit rotating shaft 21, and its outlet is connected to an external return line. When the glue gun is in standby mode or has not been spraying glue for an extended period, the control system activates a drive element 53 (e.g., a solenoid valve) within the circulation valve assembly 50, causing the second pneumatic piston 52 to operate, opening the circulation path. This allows the glue in the glue supply system to flow through the fixed housing 10 at a lower pressure and flow rate and return to the glue barrel, forming a microcirculation (at this point, the port where the return line flows into the glue barrel can be considered the circulation outlet of the valve body 51), effectively preventing the glue from settling, deteriorating, or solidifying within the gun body.

[0051] Workflow:

[0052] 1. Preparation: The external glue supply system and air source are respectively connected to the glue inlet 11 and the air line interface 12 of the fixed housing 10. A robot or automated equipment moves the glue gun to the predetermined glue application starting position.

[0053] 2. Rotational positioning: According to the shape of the workpiece and the gluing trajectory, an external driving source drives the rotation mechanism 20 to rotate the multi-nozzle assembly 40 to the required initial angle.

[0054] 3. Gluing: The control system selects one or more glue nozzles 41 for glue application based on program instructions. For example, to use glue nozzle No. 1, compressed air is supplied to its corresponding glue dispensing switch assembly 42. The first pneumatic piston 421 drives the ejector rod 422 away from the glue outlet of the glue nozzle 41, opening the outlet and squeezing the glue under pressure. Simultaneously, the robot drives the entire glue gun along a predetermined trajectory. During the glue application process, the rotating mechanism 20 adjusts the nozzle angle in real time according to the desired trajectory.

[0055] 4. Switching the glue nozzle: When a 90-degree corner needs to be coated, the system can instantly close the No. 1 glue nozzle and open the No. 2 glue nozzle at a 90-degree angle to it. The whole process does not require shutdown or mechanical adjustment.

[0056] 5. Stop / Standby: After the glue application task is completed, all glue dispensing switch components 42 are closed. If the downtime is expected to be long, the control system will start the circulation valve component 50 to allow the glue to flow back into the gun body for the next use.

[0057] In summary, this invention successfully separates the rotational motion of the nozzle from the fixed state of the external pipeline through its innovative internal rotary transmission design, solving the fundamental problem of pipeline entanglement. Furthermore, by integrating multiple independently controllable nozzles, it significantly improves the flexibility and production efficiency of the gluing operation. Combined with a loop anti-blocking design, it ensures long-term stable operation of the equipment. This invention provides a high-performance, highly reliable solution for the field of automated precision gluing.

[0058] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A rotary glue gun with multiple nozzles, comprising a fixed housing having a connecting end, characterized in that: It also includes a rotating mechanism, a nozzle support portion and a multi-nozzle assembly that are sequentially connected and rotate synchronously; The fixed housing has a rubber inlet and an air path interface; The rotating mechanism is rotatably connected to the fixed housing, and the rotating mechanism includes a glue path rotating shaft and a gas path rotating shaft. The glue path rotating shaft is connected to the glue inlet, and the gas path rotating shaft is connected to the gas path interface. A plurality of glue discharge switch components are provided in the gas path rotating shaft. The multi-nozzle assembly includes a plurality of nozzles arranged on the nozzle support portion, and the nozzle support portion is provided with a glue hole for connecting the glue path rotating shaft and the nozzle, and a matching hole for connecting the air path rotating shaft and the nozzle. Each of the nozzles is connected to a corresponding glue discharge switch assembly so that the glue discharge switch assembly can control the glue discharge switch state of each nozzle.

2. The rotary glue gun with multiple nozzles according to claim 1, characterized in that: The glue path rotating shaft is a hollow structure, forming a through glue channel, the glue channel is connected to the glue inlet and is connected to each of the glue nozzles; The air circuit rotating shaft is a hollow structure, forming a penetrating air circuit channel, and the air circuit channel is communicated with the air circuit interface to provide a driving force for each of the glue discharge switch components to control the corresponding glue nozzle glue discharge switch state.

3. The rotary glue gun with multiple nozzles according to claim 1, characterized in that: The glue discharge switch assembly includes a first pneumatic piston and a push rod connected thereto, the push rod having a disengaged state and an abutting state. When in the disengaged state, the push rod is disengaged from the glue discharge port of the glue nozzle. When in the abutting state, the push rod abuts against the glue discharge port of the glue nozzle to seal the glue discharge port of the glue nozzle.

4. The rotary glue gun with multiple nozzles according to claim 1, characterized in that: There are two nozzles, and the angle between the two nozzles is 90 degrees; The multi-nozzle assembly further comprises a special-shaped nozzle, wherein the special-shaped nozzle comprises a curved section, and a flat outlet is formed at the end of the curved section.

5. The rotary glue gun with multiple nozzles according to claim 1, characterized in that: The rotating mechanism is connected to an external driving source, and the external driving source is any one of an electric motor, a pneumatic motor or a hydraulic motor.

6. The rotary glue gun with multiple nozzles according to claim 1, characterized in that: It also includes a circulation valve assembly, which is arranged on the side wall of the fixed housing and is connected to the glue path rotating shaft, and is used to realize the backflow circulation of the glue when the glue discharge is closed; The circulation valve assembly includes a valve body, a second pneumatic piston and a driving element. The driving element can drive the second pneumatic piston to reciprocate axially in the valve body to control the circulation of the rubber material. The driving element is a solenoid valve and / or a pneumatic valve. The valve body is provided with a circulation inlet and a circulation outlet both of which are communicated with the rubber material inlet.

Images