Dispensing mechanism controlled by ultrasonic waves

Abstract

The invention provides an ultrasonic-controlled dispensing mechanism, and relates to the technical field of dispensing, the ultrasonic-controlled dispensing mechanism comprises a rack, and a glue cylinder fixing assembly is mounted on the rack; the glue dispensing barrel is filled with glue liquid, the glue dispensing barrel is installed in the glue barrel fixing assembly, a glue supplementing device is installed on the side face of the glue dispensing barrel, and a glue dispensing head assembly is installed at a glue outlet of the glue dispensing barrel; and the ultrasonic assembly is mounted at the top of the dispensing rubber barrel and is used for generating ultrasonic waves according to set ultrasonic acoustic parameters, so that the glue solution in the dispensing rubber barrel is sprayed out from the dispensing head assembly under the action of the ultrasonic waves to finish dispensing of a device below the dispensing head assembly. The device has the beneficial effects that the structural complexity is greatly simplified, the fault possibility is reduced, the maintenance difficulty during fault is reduced, and the time cost and the labor cost are saved; ultrasonic waves have the advantage of high precision conditions and are suitable for high-precision dispensing scenes, and the requirements for dispensing efficiency and dispensing quality are met by adjusting the glue drop spraying speed.

Description

Technical Field

[0001] The invention relates to the technical field of glue dispensing, and in particular to a glue dispensing mechanism controlled by ultrasonic wave. Background Art

[0002] As a core skill in the field of microelectronics packaging, dispensing technology has become increasingly important with the rapid development of the electronics manufacturing industry. As the industry's pursuit of product quality and performance continues to upgrade, microelectronics packaging has put forward higher requirements for the accuracy of dispensing technology, the control of glue volume, and dispensing efficiency.

[0003] From the perspective of the contact between the dispensing head and the workpiece, dispensing technology can be mainly divided into two categories: contact dispensing and non-contact jet dispensing. Contact dispensing relies on the dispensing needle to guide the glue liquid to contact the substrate, through delayed infiltration, and then the needle rises, the glue liquid and the substrate are separated by viscosity, thus forming the required glue dots on the substrate. Although this technology is commonly used, such as time / pressure dispensing, screw dispensing, piston dispensing, etc., they have extremely high requirements for the precision of the motion system, especially in the direction of the glue head movement. If you are not careful, it may collide with the device, and because of the cumbersome movements, the dispensing speed and efficiency are limited.

[0004] Non-contact jet dispensing cleverly avoids the above problems. Its nozzle moves flexibly in the X and Y directions above the device, without the need for vertical movement in the Z direction, which significantly improves the flexibility and safety of operation. Its working principle is that the jet dispensing valve maintains a certain distance from the target device when working, and through the high-frequency reciprocating motion of the striker inside the valve body, the glue near the glue outlet is accurately squeezed out, and finally precise coating is achieved at the target position, whether it is a dot, line or other complex glue spraying trajectory, it can be easily achieved.

[0005] At present, the main driving modes of jet dispensing valves include piezoelectric ceramic drive and pneumatic drive. Piezoelectric ceramics meet the strict requirements of industry for dispensing valve accuracy and frequency with their high-frequency response characteristics, but are limited by the output displacement of the piezoelectric stack and often require the use of an amplification mechanism to enhance the effect. Although the pneumatic dispensing valve has a relatively simple structure, it has difficulties in heating, and the repetitive stability of the glue point quality is poor. The residual air pressure may also cause dripping.

[0006] It is worth noting that when using a jet dispensing valve, it is necessary to cooperate with the corresponding mechanical structure, and the amount of glue sprayed at one time is fixed, which is not convenient for real-time adjustment. If the amount of glue sprayed at one time is insufficient, it is often necessary to achieve the expected glue dot size by continuously spraying multiple points, which undoubtedly increases the complexity and time cost of the operation. Therefore, in actual applications, how to flexibly adjust the dispensing parameters according to specific needs to achieve efficient and accurate dispensing operations is still a major challenge facing the industry. Summary of the invention

[0007] In view of the problems existing in the prior art, the present invention provides an ultrasonically controlled dispensing mechanism, comprising:

[0008] A frame, on which a rubber cartridge fixing assembly is mounted;

[0009] A dispensing glue cylinder, wherein the dispensing glue cylinder is filled with glue liquid, the dispensing glue cylinder is installed in the glue cylinder fixing assembly, a glue replenishing device is installed on the side of the dispensing glue cylinder, and the glue replenishing device is used to replenish the glue liquid to the dispensing glue cylinder, and a dispensing head assembly is installed at the glue outlet of the dispensing glue cylinder;

[0010] The ultrasonic component is installed on the top of the dispensing glue cylinder and is used to generate ultrasonic waves according to set ultrasonic acoustic parameters, so that the glue in the dispensing glue cylinder is sprayed out from the dispensing head assembly under the action of ultrasonic waves to complete the dispensing of the device below the dispensing head assembly.

[0011] Preferably, the dispensing head assembly comprises:

[0012] A needle base, the tail end of which is mounted on the glue outlet;

[0013] A dispensing needle, the tail end of which is fixed to the head end of the needle base via a thread.

[0014] Preferably, the ultrasonic component comprises:

[0015] A focused ultrasonic transducer, wherein an ultrasonic transducer mounting seat is installed at the lower end of the focused ultrasonic transducer, and the ultrasonic transducer mounting seat is embeddedly installed inside the dispensing glue cylinder, and the acoustic focusing point of the focused ultrasonic transducer is focused on the glue outlet of the dispensing head assembly;

[0016] An ultrasonic generating device, the ultrasonic generating device is connected to the focused ultrasonic transducer and is used to set the ultrasonic sound parameters to adjust the ultrasonic waves emitted by the focused ultrasonic transducer.

[0017] Preferably, a glue filling port is provided on the side of the glue dispensing cylinder, and the glue filling device comprises:

[0018] A connecting element installed at the glue filling port;

[0019] A glue inlet pipe, one end of which is connected to the connecting element, and the other end of which is connected to an external glue supply box, for replenishing the glue in the glue supply box into the glue dispensing cylinder.

[0020] Preferably, the other end of the glue inlet pipe faces vertically upward.

[0021] Preferably, the rubber cartridge fixing assembly comprises:

[0022] A fixing plate, the upper end of which is connected to the frame;

[0023] A fixing ring, one side of which is connected to the lower end of the fixing plate, and the dispensing glue cylinder is placed in the fixing ring;

[0024] A receiving plate is connected to the bottom of one side of the fixing ring and is located below the glue dispensing cylinder. The receiving plate is provided with an opening, and the glue dispensing head assembly passes through the opening from top to bottom.

[0025] Preferably, a tightening screw hole is provided on the other side of the fixing ring, and a tightening screw is provided in the tightening screw hole, and the glue dispensing cylinder is clamped by tightening the tightening screw toward the center of the fixing ring.

[0026] Preferably, the inner diameter of the opening is larger than the outer diameter of the dispensing head assembly and smaller than the diameter of the dispensing rubber cylinder.

[0027] The above technical solution has the following advantages or beneficial effects:

[0028] The present invention realizes the dispensing function and all-round control of the dispensing glue droplets through ultrasonic sound energy:

[0029] 1) The ultrasonic sound pressure generated by the ultrasonic component acts on the glue in the dispensing tube to give the glue energy, and the glue is ejected from the dispensing head assembly. There is no need to squeeze out the colloid through mechanical transmission, pneumatic transmission, or hydraulic transmission. Compared with the traditional mechanized dispensing mechanism, the structural complexity is greatly simplified, the possibility of failure is reduced, the difficulty of maintenance in the event of a failure is reduced, and time and labor costs are saved;

[0030] 2) Intelligent digital control of the glue droplet spraying state can be achieved simply by changing the ultrasonic acoustic parameters of the ultrasonic component. The volume of the sprayed glue droplet can be adjusted within a large range. Ultrasonic waves have the advantage of high-precision conditions and are suitable for high-precision dispensing scenarios. The glue droplet spraying speed can be adjusted while taking into account the requirements for dispensing efficiency and dispensing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of an ultrasonically controlled glue dispensing mechanism in a preferred embodiment of the present invention;

[0032] Figure 2 A schematic side view of an ultrasonically controlled dispensing mechanism in a preferred embodiment of the present invention;

[0033] Figure 3 The cross-sectional schematic diagram of an ultrasonically controlled dispensing mechanism in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The present invention is not limited to this embodiment, and other embodiments may also fall within the scope of the present invention as long as they conform to the gist of the present invention.

[0035] In a preferred embodiment of the present invention, based on the above problems existing in the prior art, an ultrasonically controlled dispensing mechanism is provided, comprising:

[0036] A frame 1, on which a rubber cartridge fixing assembly 2 is mounted;

[0037] A dispensing glue cylinder 3, which is filled with glue liquid, is installed in the glue cylinder fixing assembly 2, a glue replenishing device 4 is installed on the side of the dispensing glue cylinder 3, and the glue replenishing device 4 is used to replenish the glue liquid to the dispensing glue cylinder 3, and a dispensing head assembly 5 is installed at the glue outlet 31 of the dispensing glue cylinder 3;

[0038] The ultrasonic component 6 is installed on the top of the glue dispensing cylinder 3 and is used to generate ultrasonic waves according to the set ultrasonic acoustic parameters, so that the glue in the glue dispensing cylinder 3 is sprayed out from the glue dispensing head component 5 under the action of the ultrasonic wave to complete the glue dispensing of the device below the glue dispensing head component 5.

[0039] Specifically, an ultrasonically controlled dispensing mechanism is proposed in this embodiment. The mechanism uses a non-contact jet dispensing method, but is different from the existing non-contact jet dispensing device in that it does not require the use of other valve bodies such as piezoelectric ceramic dispensing valves and pneumatic dispensing valves.

[0040] like Figure 1 FIG. 1 is a schematic diagram of the structure of the ultrasonically controlled dispensing mechanism provided in this embodiment. Figure 2 Shown is a side view of the ultrasonically controlled dispensing mechanism provided in this embodiment.

[0041] from Figure 1 and Figure 2 It can be seen that the ultrasonic component 6, the dispensing glue cylinder 3 and the dispensing head component 5 are connected in sequence from top to bottom. The ultrasonic wave generated by the ultrasonic component 6 acts on the glue in the dispensing glue cylinder 3. The glue is ejected from the dispensing head component 5 under the action of the ultrasonic sound pressure to complete the dispensing of the device.

[0042] The ultrasonic component 6, the glue dispensing cylinder 3 and the glue dispensing head component 5 are installed in the glue cylinder fixing component and fixed on the frame 1 through the glue cylinder fixing component 2. The overall structure is simple and the connection method is not complicated.

[0043] It should be noted that the present invention proposes an ultrasonically controlled dispensing mechanism, with the focus on the dispensing mechanism, which only completes the dispensing work and controls the volume of the sprayed glue droplets and the speed of the glue droplets. Other motion mechanisms required to complete the entire dispensing process, such as the motion control mechanism that drives the dispensing mechanism to move in the X and Y directions, the device clamping mechanism that clamps the device that needs to be dispensed, the glue replenishing components and racks that replenish the glue to the dispensing mechanism, etc. still use the corresponding parts in the existing dispensing device and will not be introduced in detail in the following description.

[0044] The present invention proposes an ultrasonically controlled dispensing mechanism that uses the sound pressure of ultrasound to act on the glue liquid. After the glue liquid is squeezed by sufficient ultrasonic sound pressure, it has a certain amount of energy. In the glue liquid near the dispensing needle, a certain volume of glue droplets will be ejected along the dispensing needle at a certain speed, and finally the glue droplets reach the dispensing part of the device. This ultrasonically controlled dispensing mechanism greatly simplifies the structure of the dispensing device using various dispensing valves. It only needs to select appropriate ultrasonic components according to the requirements for the glue droplets to meet the aperture and frequency requirements of the dispensing, and then add corresponding excitation pulses to the transducer in the ultrasonic component to generate corresponding ultrasonic waves. Flexible control of the sprayed glue droplets is achieved by adjusting the acoustic parameters of the ultrasonic waves.

[0045] Ultrasonic waves have high frequency, strong penetration, high sensitivity, strong directionality, and can generate huge force when propagating in the medium. Therefore, the sound pressure generated when ultrasonic waves propagate in the glue can be used to spray out the glue to complete the dispensing work.

[0046] The control of glue droplets is achieved by controlling the acoustic parameters of ultrasound. The acoustic parameters of ultrasound can be changed by adjusting the parameters of the excitation pulse generated by the ultrasonic component, thereby controlling the volume and speed of glue droplets ejected in one glue dispensing. In practice, different glue dispensing devices often have different requirements for the amount of glue dispensed. By accurately controlling the volume of the ejected glue droplets, it is possible to adapt to different glue dispensing devices and various glue dispensing scenarios.

[0047] The glue droplet ejection speed determines the glue dispensing quality and efficiency. If the glue droplet is ejected from the glue dispensing needle too slowly, the glue dispensing efficiency will be reduced; if the glue droplet is ejected from the glue dispensing needle too fast, the glue dispensing quality will be affected. Too high a speed may cause partial splashing of the glue droplet after it hits the device.

[0048] Therefore, when using the ultrasonic controlled glue dispensing mechanism provided in this embodiment, the control of the injection speed of the glue droplets needs to take into account both the glue dispensing efficiency and the glue dispensing quality, that is, the injection speed of the glue droplets is controlled so that the ejected glue droplets are stable and splash-free after reaching the glue dispensing point of the device, and the glue droplets have as high a speed as possible without being scattered. Before actual use, it is necessary to adjust the acoustic parameters of the ultrasonic wave by continuously testing and adjusting the power, amplitude, frequency and duration of the excitation pulse, so as to achieve control of the ejected glue droplet volume and the glue droplet injection speed.

[0049] In a preferred embodiment of the present invention, the dispensing head assembly 5 includes:

[0050] A needle base 51, the tail end of the needle base 51 is installed at the glue outlet 31;

[0051] The glue dispensing needle 52 has a tail end fixed to the head end of the needle base 51 through a thread.

[0052] Specifically, in the present embodiment, the glue dispensing head assembly 5 is composed of two parts. The needle base 51 serves to connect the glue outlet and the glue dispensing needle 52. The glue dispensing needle and the needle base can be disassembled and assembled through threads. When the glue dispensing needle is blocked, it is convenient to replace either the glue dispensing needle or the needle base, which improves the convenience of maintenance and can also save certain costs.

[0053] And when there are special needs, for example, if a customized device is to be glued and a needle of a specific shape or a specific length is required, only the needle base 51 and the glue dispensing needle 52 of the glue outlet need to be replaced, and there is no need to replace the entire glue dispensing cylinder 3, which is suitable for a variety of scene requirements.

[0054] In a preferred embodiment of the present invention, the ultrasonic component 6 comprises:

[0055] A focused ultrasonic transducer 61, an ultrasonic transducer mounting seat 62 is mounted at the lower end of the focused ultrasonic transducer 61, the ultrasonic transducer mounting seat 62 is embeddedly mounted inside the glue dispensing cylinder 3, and the acoustic focus point of the focused ultrasonic transducer 61 is focused on the glue outlet of the glue dispensing head assembly 5;

[0056] The ultrasonic generating device is connected to the ultrasonic transducer 61 and is used to set ultrasonic sound parameters to adjust the ultrasonic waves emitted by the ultrasonic transducer.

[0057] Specifically, in this embodiment, the ultrasonic component 6 includes an ultrasonic generator and a focused ultrasonic transducer 61. The ultrasonic generator can use an existing device, specifically including an oscillator, a pulse generator, a power amplifier, an ultrasonic generator, and a power supply. The oscillator, the pulse generator, the power amplifier, the ultrasonic generator, and the power supply are not embodied in the present invention. They are standard external devices and form a loop with the focused ultrasonic transducer 61 to complete the generation of ultrasonic waves and the adjustment of ultrasonic acoustic parameters. In actual use, only the ultrasonic generator needs to be connected to the ultrasonic transducer 61 to form a complete ultrasonic component 6 to generate and control ultrasonic waves;

[0058] The focused ultrasonic transducer 61 used in this embodiment can focus the energy of the ultrasonic wave on the glue droplet nozzle of the glue dispensing head assembly 5 (the specific position can adjust the focusing length according to the actual situation), thereby avoiding the potential danger of the sound irradiating to other positions of the glue cylinder and generating heat to cause chemical changes in the glue liquid;

[0059] The corresponding acoustic parameters of the ultrasonic wave are adjusted by adjusting the power, amplitude and duration of the excitation pulse through the ultrasonic generator, thereby controlling the injection speed of the glue droplets. The injection volume of the glue droplets mainly depends on the frequency of the excitation pulse and the focal length of the transducer.

[0060] The lower end surface of the focused ultrasonic transducer 61 is provided with a threaded hole which is threadedly connected to the transducer mounting seat 62. Figure 3 As shown, the transducer mounting seat 62 has a certain depth and is completely embedded in the dispensing glue cylinder 3 and surrounded by glue. This structure allows the ultrasonic wave focused by the focused ultrasonic transducer 61 to directly act on the glue 32, avoiding the attenuation of the ultrasonic wave through other media during the propagation path.

[0061] In a preferred embodiment of the present invention, a glue filling port 33 is provided on the side of the glue dispensing tube 3, and the glue filling device 4 includes:

[0062] A connecting element 41 is installed at the glue filling port 33;

[0063] The glue inlet pipe 42 has one end connected to the connecting element 41 and the other end connected to an external glue supply box.

[0064] Specifically, in this embodiment, Figure 1 and Figure 3 As shown, a glue replenishing port 33 is opened on the side of the glue dispensing cylinder 3, and a connecting element 41 is installed at the glue replenishing port 33 for connecting to a glue inlet pipe 42, and the glue inlet pipe 42 is connected to an external glue supply box to replenish the glue 32 in the glue dispensing cylinder 3 in real time during the glue dispensing process.

[0065] There are also connecting pipes, pump bodies, valve bodies and other components between the glue inlet pipe 42 and the external glue supply box. These components all use existing kits to pump the glue supply box into the glue dispensing cylinder. They are not shown in the drawings of the present invention. In actual use, it is only necessary to connect the external device and the glue inlet pipe.

[0066] In a preferred embodiment of the present invention, the other end of the glue inlet pipe 42 faces vertically upward.

[0067] Specifically, in this embodiment, one end of the glue inlet pipe 42 connected to the external glue supply box is facing upward, which can alleviate the glue leakage to a certain extent.

[0068] In a preferred embodiment of the present invention, Figure 2 As shown, the rubber cartridge fixing assembly 2 includes:

[0069] A fixing plate 21, the upper end of which is connected to the frame 1;

[0070] A fixing ring 22, one side of which is connected to the lower end of the fixing plate 21, and the dispensing glue cartridge 3 is placed in the fixing ring 22;

[0071] The receiving plate 23 is connected to the bottom of one side of the fixing ring 22 and is located below the dispensing glue cylinder 3. Figure 3 As shown in the cross-sectional view in FIG. 2 , the receiving plate 23 is provided with an opening 231, the inner diameter of the opening 231 is larger than the outer diameter of the dispensing head assembly 5 and smaller than the diameter of the dispensing rubber cylinder 3. The dispensing head assembly 5 passes through the opening 231 from top to bottom.

[0072] Specifically, in this embodiment, the glue cylinder fixing assembly 2 includes two parts, and the fixing ring 22 surrounds the glue cylinder 3 in the middle, and is used to fix the glue cylinder 3 in the X and Y directions to prevent the glue cylinder 3 from tilting or displacement;

[0073] The receiving plate 23 is located below the glue dispensing cylinder 3 to receive the glue dispensing cylinder 3 when the fixing ring 22 is unstable and causes the glue dispensing cylinder 3 to fall, so as to avoid further damage and unpredictable losses.

[0074] like Figure 2 As shown, the fixing ring 22 and the receiving plate 23 are connected, and the fixing ring 22 is connected to the frame 1 through the fixing plate 21, and the connection method is simple.

[0075] In another embodiment, there is also a rotatable component 11 in the frame 1, and the rotatable component 11 has a rotating shaft 111. A rotating block 112 is sleeved on the rotating shaft 111, and the rotating block 112 is connected to the upper end of the fixed plate 21. When the device clamping mechanism clamps and places the dispensing device, the rotating block 112 rotates on the rotating shaft to drive the glue cartridge fixing component 2 to rotate and adjust the dispensing position of the dispensing mechanism, thereby increasing the dispensing range.

[0076] Furthermore, the frame 1 can be fixed at a certain fixed position, such as on a wall; or it can be installed on the aforementioned driving dispensing mechanism to complete the movement of the glue cylinder fixing assembly 2 in the X and Y directions.

[0077] In a preferred embodiment of the present invention, a tightening screw hole is provided on the other side of the fixing ring 22 , and a tightening screw 24 is provided in the tightening screw hole. The glue dispensing cylinder 3 is clamped by tightening the tightening screw toward the center of the fixing ring 22 .

[0078] Specifically, in this embodiment, Figure 2 As shown, a tightening screw 24 is additionally provided on the fixing ring 22 for further fixing and clamping the glue dispensing cylinder 3 to avoid the aforementioned situation where the fixing ring 22 is unstable and causes the glue dispensing cylinder 3 to fall.

[0079] In general, the ultrasonically controlled dispensing mechanism proposed in the present invention has the characteristics of simple structure, easy control, high dispensing quality, high dispensing efficiency, and can be adapted to different dispensing devices and a variety of dispensing scenarios.

[0080] Compared with the prior art, the present invention has the following beneficial effects:

[0081] The present invention realizes the glue dispensing function and all-round control of the glue dispensing droplets through ultrasonic sound energy.

[0082] On the one hand, the ultrasonic sound pressure generated by the ultrasonic component acts on the glue liquid to give it energy, so that the glue liquid can be ejected from the dispensing head component. There is no need to squeeze out the colloid through mechanical transmission, pneumatic transmission, or hydraulic transmission, and the structural complexity is greatly simplified.

[0083] On the other hand, by changing the ultrasonic acoustic parameters to achieve intelligent digital control of the glue droplet injection state, the volume of the sprayed glue droplet can be adjusted within a large range to adapt to high-precision dispensing scenarios, and the glue droplet injection speed can be adjusted to take into account the requirements for dispensing efficiency and dispensing quality.

[0084] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims

1. An ultrasonically controlled dispensing mechanism, characterized in that: include: A frame, on which a rubber cylinder fixing assembly is mounted; A dispensing rubber cartridge, wherein the dispensing rubber cartridge is filled with glue liquid and is installed in the rubber cartridge fixing assembly. A glue replenishing device is installed on the side of the dispensing rubber cartridge, and the glue replenishing device is used to replenish glue liquid to the dispensing rubber cartridge. A dispensing head assembly is installed at the glue outlet of the dispensing rubber cartridge; The ultrasonic component is installed on the top of the dispensing glue cylinder and is used to generate ultrasonic waves according to the set ultrasonic acoustic parameters, so that the glue in the dispensing glue cylinder is ejected from the dispensing head assembly under the action of the ultrasonic wave to complete the dispensing of the device below the dispensing head assembly.

2. The dispensing mechanism according to claim 1, characterized in that: The dispensing head assembly includes: A needle base, the tail end of which is mounted on the glue outlet; A dispensing needle, the tail end of which is fixed to the head end of the needle base via a thread.

3. The dispensing mechanism according to claim 1, characterized in that: The ultrasonic assembly comprises: A focused ultrasonic transducer, wherein an ultrasonic transducer mounting seat is installed at the lower end of the focused ultrasonic transducer, and the ultrasonic transducer mounting seat is embedded in the interior of the dispensing glue cylinder, and the acoustic focusing point of the focused ultrasonic transducer is focused on the glue outlet of the dispensing head assembly; An ultrasonic generating device is connected to the focused ultrasonic transducer and is used to set the ultrasonic sound parameters to adjust the ultrasonic waves emitted by the focused ultrasonic transducer.

4. The dispensing mechanism according to claim 1, characterized in that: The side of the dispensing glue cylinder is provided with a glue filling port, and the glue filling device includes: A connecting element is installed at the glue filling port; A glue inlet pipe, one end of which is connected to the connecting element, and the other end of which is connected to an external glue supply box, is used to replenish the glue in the glue supply box into the glue dispensing cylinder.

5. The dispensing mechanism according to claim 4, characterized in that: The other end of the glue inlet pipe faces vertically upward.

6. The dispensing mechanism according to claim 1, characterized in that: The rubber cylinder fixing assembly includes: A fixing plate, the upper end of which is connected to the frame; A fixing ring, one side of which is connected to the lower end of the fixing plate, and the dispensing glue cartridge is placed in the fixing ring; A receiving plate is connected to the bottom of one side of the fixing ring and is located below the dispensing glue cylinder. The receiving plate is provided with an opening, and the dispensing head assembly passes through the opening from top to bottom.

7. The dispensing mechanism according to claim 6, characterized in that: A tightening screw hole is provided on the other side of the fixing ring, and a tightening screw is provided in the tightening screw hole. The dispensing rubber cylinder is clamped by tightening the tightening screw toward the center of the fixing ring.

8. The dispensing mechanism according to claim 6, characterized in that: The inner diameter of the opening is larger than the outer diameter of the dispensing head assembly and smaller than the diameter of the dispensing rubber cylinder.

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