Dispensing head of a dispensing machine
By adding an air inlet channel and air inlet valve assembly to the dispensing machine mixing head, high-pressure gas is used to purge moisture, which solves the problem of residual moisture affecting the performance of the adhesive, improves mixing efficiency and equipment versatility, and reduces maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JIANCAI EQUIPMENT TECHNOLOGY CO LTD
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-21
AI Technical Summary
The existing mixing head leaves residual moisture in the channel after cleaning, which affects the performance of the adhesive and the mixing efficiency. Furthermore, long-term residue leads to channel corrosion and increased equipment maintenance costs.
A dispensing machine mixing head was designed, with an added air inlet channel and air inlet valve assembly. Residual water vapor in the mixing channel is swept away by high-pressure gas. Combined with the opposing side layout of the water inlet channel and glue inlet channel, a counter-flow of water is formed to ensure that there is no residue on the inner wall of the channel.
It effectively removes residual moisture, ensures the stability of adhesive properties, improves mixing uniformity and equipment versatility, and reduces equipment maintenance costs.
Smart Images
Figure CN224525151U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dispensing machine technology, specifically to a dispensing machine mixing head. Background Technology
[0002] Dispensing machines, also known as glue applicators or glue applicators, are mainly used for processes such as polymerization reaction sealing, bonding, and casting of easily flowing or viscous liquid adhesives. Dispensing machines generally employ three-axis or multi-axis linkage and can be used for planar glue application (such as square, round, and various irregular shapes) as well as three-dimensional glue application. They offer precise positioning and accurate glue control, preventing glue leakage and dripping. The application of dispensing machines greatly improves product production efficiency and product quality. In terms of automation, they can achieve three-axis linkage and intelligent operation, adapting to the dispensing of various products. They are characterized by simple programming and convenient operation.
[0003] Existing technology, such as the patent with publication number CN215141629U, discloses a mixing head for a CNC sealing dispensing machine, including a servo motor, a motor mounting base, a motor fixing base, a motor fixing base clamp, a channel chamber, an A-adhesive valve assembly, a B-adhesive valve assembly, a first flushing valve assembly, a second flushing valve assembly, a water circulation thermostatic assembly, a shaft-driven sealing assembly, and a mixing and dispensing assembly. The channel chamber is machined with an adhesive channel, a flushing channel, and a circulating water channel. After the mixing head is used, moisture will remain in the adhesive channel. If this residual moisture is not removed in time, it will affect the viscosity and mixing ratio of the adhesive, thereby reducing the sealing performance and structural strength of the dispensing product. At the same time, long-term residual moisture will cause corrosion of the inner wall of the channel or solidification of the adhesive residue, increasing equipment maintenance costs and shortening its service life. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a mixing head for a dispensing machine.
[0005] The technical solution adopted by this utility model is as follows: This application provides a mixing head for a dispensing machine, including a mixing body. The mixing body is provided with an inlet channel, a water inlet channel, a mixing channel and an outlet channel. An inlet valve assembly and a water inlet valve assembly are provided on the mixing body. An air inlet channel is provided in the channel chamber, and an air inlet valve assembly is provided on the air inlet channel. The inlet channel, water inlet channel and air inlet channel are respectively connected to the mixing channel. The mixing channel is connected to the outlet channel. The inlet valve assembly is used to control the opening and closing of the inlet channel. The water inlet valve assembly is used to control the opening and closing of the water inlet channel. The air inlet valve assembly is used to control the opening and closing of the air inlet channel. The air inlet channel is used to blow out water vapor in the mixing channel.
[0006] In some embodiments, there are two glue inlet channels, and two glue inlet valve assemblies are arranged in a V-shape on the glue mixing body. The glue inlet valve assembly includes: The first channel is connected to the glue inlet channel and the mixing channel, respectively; A glue valve assembly includes a glue valve cylinder, a glue valve piston, and a glue valve PTFE head. The glue valve cylinder is threadedly connected to a first channel. The glue valve piston is disposed within the glue valve cylinder. The glue valve PTFE head is connected to the glue valve piston. The glue valve PTFE head has a closed position that blocks the glue inlet channel and the mixing channel and an open position that connects the glue inlet channel and the mixing channel. The vent pipe for the PTFE valve is used to supply air to the lower chamber of the PTFE valve cylinder so that the PTFE valve head is in the open position. The air supply pipe for the glue valve is used to supply air to the upper chamber of the glue valve cylinder so that the PTFE head of the glue valve is in the closed position.
[0007] In some embodiments, the air intake channel is disposed between two glue inlet channels, and the air intake valve assembly includes: The valve cylinder body is threadedly connected to the intake passage; The valve piston is located inside the valve cylinder. The valve sealing rod, which is connected to the valve piston, has a closed position that blocks the intake passage from the mixing passage and an open position that connects the intake passage and the mixing passage; The air valve opening pipe is connected to the air intake passage and is used to supply air to the lower chamber of the air valve cylinder so that the air valve sealing rod is in the open position. The air valve shut-off pipe is located on the air valve cylinder and is used to supply air to the upper chamber of the air valve cylinder so that the air valve sealing rod is in the closed position.
[0008] In some embodiments, there are two water inlet channels, which are located on opposite sides of the two glue inlet channels.
[0009] In some embodiments, the mixing body includes a channel chamber, a motor frame, a mixing body, and a dispensing nozzle. The motor frame is disposed at the upper end of the channel chamber, and a drive motor is disposed at its upper end. The glue inlet channel, water inlet channel, and air inlet channel are all disposed within the channel chamber. The glue inlet valve assembly, water inlet valve assembly, and air inlet valve assembly are all disposed on the channel chamber. The mixing channel is disposed within the mixing body, and the mixing body is threadedly connected to the lower end of the channel chamber. The dispensing channel is disposed within the dispensing nozzle.
[0010] In some embodiments, the motor frame is provided with a axially driven sealing assembly and a sealing air pipe connector. The upper part of the axially driven sealing assembly is connected to the output shaft of the drive motor, and the lower part is connected to a stirring shaft. The stirring shaft is rotatably disposed in the mixing channel.
[0011] In some embodiments, a conical plug for sealing is provided at the bottom of the stirring shaft, a sealing seat is provided between the dispensing nozzle and the mixing body, the mixing body and the dispensing nozzle are connected by threads to clamp and fix the sealing seat, the sealing seat is provided with a through hole connecting the mixing channel and the dispensing channel, and a conical groove that mates with the conical plug is provided at the upper end of the through hole.
[0012] In some embodiments, the outlet end of the dispensing nozzle is provided with an external thread section, a sleeve is threadedly connected to the external thread section, the external thread section is provided with multiple slots, the end of the external thread section is provided with a first conical surface, and the inner wall of the outlet end of the sleeve is provided with a second conical surface.
[0013] In some embodiments, the intake passage is inclined downward relative to the mixing passage, and the angle of inclination is 45°-65°.
[0014] In some embodiments, the device further includes an adhesive dispenser, which is provided with a first adhesive inlet, a second adhesive inlet, a first adhesive outlet, a second adhesive outlet, a first return adhesive outlet, a second return adhesive outlet, a first air valve, a second air valve, a first air port, and a second air port. The first adhesive outlet and the second adhesive outlet are respectively connected to two adhesive inlet channels. The first air valve is used to control the connection between the first adhesive inlet and the first adhesive outlet or between the first adhesive inlet and the first return adhesive outlet. The second air valve is used to control the connection between the second adhesive inlet and the second adhesive outlet or between the second adhesive inlet and the second return adhesive outlet.
[0015] The beneficial effects of this utility model are as follows: By adding an air inlet channel and an air inlet valve assembly, high-pressure gas can be introduced into the mixing channel after the cleaning operation to blow out the residual water vapor from the glue outlet channel, thereby avoiding the influence of water vapor on the performance of the subsequent glue and ensuring the stability of the glue dispensing quality. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.
[0017] Figure 1 This is a schematic diagram of a mixing head for a dispensing machine according to this utility model. Figure 1 ; Figure 2 This is a schematic diagram of a mixing head for a dispensing machine according to this utility model. Figure 2 ; Figure 3 This is a cross-sectional view of the mixing head of a dispensing machine according to the present invention; Figure 4 This is a partial cross-section of the mixing head of a dispensing machine according to the present invention. Figure 1 ; Figure 5 This is a partial cross-section of the mixing head of a dispensing machine according to the present invention. Figure 2 ; Figure 6 This is a partial cross-sectional view of the mixed colloid, dispensing nozzle, sealing seat, and sleeve in this utility model; Figure 7 This is an exploded view of the mixed colloid, dispensing nozzle, sealing seat, and sleeve in this utility model; Figure 8 This is a schematic diagram of the glue dispenser in this utility model; Figure 9 This is a cross-sectional view of the glue dispenser in this utility model. Detailed Implementation
[0018] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.
[0019] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "lateral", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element or component to have a specific orientation, or to be constructed and operated in a specific orientation.
[0020] It should be noted that the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different components and should not be construed as limiting the embodiments of this application.
[0021] It should be noted that the terms "installation," "setup," "equipped with," "connection," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral structures; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts.
[0022] It should be noted that the terms "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "in some embodiments," "exemplarily," and "for example" is intended to present the relevant concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of this application.
[0023] Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0024] Regarding the accompanying drawings of this application, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not necessarily drawn to scale.
[0025] To address the problems of residual moisture in the channel after cleaning of existing mixing heads affecting the performance of the adhesive, insufficient mixing efficiency, and poor versatility.
[0026] like Figures 1 to 7 As shown, this application provides a mixing head for a dispensing machine, including a mixing body. The mixing body includes a channel chamber 1, a motor frame 2, a mixing body 3, and a dispensing nozzle 4. The motor frame 2 is located at the upper end of the channel chamber 1, and a drive motor is installed at its upper end. The mixing body 3 is threadedly connected to the lower end of the channel chamber 1, and the dispensing nozzle 4 is threadedly connected to the lower end of the mixing body 3. Modular assembly is achieved through threaded connection, which combines structural stability and convenient disassembly and assembly. Furthermore, by replacing the mixing body 3 or the dispensing nozzle 4 with different specifications, it can adapt to different adhesive strip width requirements, thereby improving the versatility of the equipment.
[0027] The channel chamber 1 is provided with a glue inlet channel 100, a water inlet channel 101 and an air inlet channel 102. The mixing body 3 is provided with a mixing channel 300. The glue outlet 4 is provided with a glue outlet channel 400. The channel chamber 1 is provided with a glue inlet valve assembly 5, a water inlet valve assembly 6 and an air inlet valve assembly 7. The glue inlet channel 100, the water inlet channel 101 and the air inlet channel 102 are respectively connected to the mixing channel 300. The mixing channel 300 is connected to the glue outlet channel 400.
[0028] Optionally, there are two glue inlet channels 100, which respectively deliver two kinds of glue liquid. There are two glue inlet valve assemblies 5, which are arranged in a V-shape on the channel chamber 1. The V-shaped layout makes the glue liquid tend to converge before entering the mixing channel 300, shortening the mixing time and improving uniformity.
[0029] Optionally, the air inlet channel 102 is disposed between the two adhesive inlet channels 100 and is correspondingly connected to the air inlet valve assembly 7 for introducing high-pressure gas. It is inclined downwards relative to the mixing channel 300 at an angle of 45°-65°, preferably 60°. This angle design allows the airflow to form a spiral blowing path, thoroughly removing residual moisture and solving the problem of moisture diluting the adhesive in the prior art.
[0030] Optionally, there are two water inlet channels 101, which are located on opposite sides of the two glue inlet channels 100 for introducing high-pressure cleaning water. The opposite side arrangement forms a counter-current water flow to ensure that there is no glue residue on the inner wall of the channel.
[0031] The glue inlet valve assembly 5 is used to control the opening and closing of the glue inlet channel 100. Specifically, the glue inlet valve assembly 5 includes a first channel 50, a glue valve assembly, a glue valve venting pipe 54, and a glue valve venting pipe 55. The first channel 50 is connected to the glue inlet channel 100 and the mixing channel 300 respectively. The adhesive valve assembly includes an adhesive valve cylinder 51, an adhesive valve piston 52, and an adhesive valve PTFE head 53. The adhesive valve cylinder 51 is threadedly connected to the first channel 50, the adhesive valve piston 52 slides within the cylinder, and the adhesive valve PTFE head 53 is threadedly connected to the piston end. The PTFE head is made of polytetrafluoroethylene (PTFE), which is resistant to adhesive corrosion and has excellent sealing performance, effectively preventing leakage.
[0032] The PTFE dispensing valve 53 has a closed position that blocks the glue inlet channel 100 and the mixing channel 300, and an open position that connects the glue inlet channel 100 and the mixing channel 300. The vent pipe 54 of the glue valve is used to supply air to the lower chamber of the glue valve cylinder 51 so that the PTFE dispensing valve 53 is in the open position. The vent pipe 55 of the glue valve is used to supply air to the upper chamber of the glue valve cylinder 51 so that the PTFE dispensing valve 53 is in the closed position. By controlling the air supply time, the glue inlet volume can be precisely adjusted to adapt to different dispensing needs.
[0033] The water inlet valve assembly 6 is used to control the opening and closing of the water inlet channel 101, and the air inlet valve assembly 7 is used to control the opening and closing of the air inlet channel 102. Both can have the same structure as the glue inlet valve assembly 5, or they can adopt a simpler structure, for example: The intake valve assembly 7 includes a valve cylinder 70, a valve piston 71, a valve sealing rod 72, a valve opening pipe 73, and a valve closing pipe 74. The valve cylinder 70 is threadedly connected to the intake channel 102. The valve piston 71 is disposed inside the valve cylinder 70. The valve sealing rod 72 is made of hard alloy material, which is wear-resistant and provides reliable sealing. It is connected to the valve piston 71 and has the functions of blocking the intake channel 102 from the closed position and connecting the intake channel 102 and the mixing channel 300 to the open position. The valve opening pipe 73 is connected to the intake channel 102 and is used to supply air to the lower chamber of the valve cylinder 70 so that the valve sealing rod 72 is in the open position. The valve closing pipe 74 is disposed on the valve cylinder 70 and is used to supply air to the upper chamber of the valve cylinder 70 so that the valve sealing rod 72 is in the closed position. High-pressure gas passes through the inclined intake channel 102. Enter the mixing channel 300 to thoroughly purge residual moisture and ensure the stability of the subsequent adhesive properties.
[0034] It is understandable that the structure of the valve can refer to the mixing head for a CNC sealing dispensing machine disclosed in the prior art patent with publication number CN215141629U.
[0035] Furthermore, the motor frame 2 is provided with a shaft-driven sealing assembly 22 and a sealing air pipe connector. The upper part of the shaft-driven sealing assembly 22 is connected to the output shaft of the drive motor, and the lower part is connected to a stirring shaft 8. The stirring shaft 8 is rotatably disposed in the mixing channel 300. The drive motor drives the stirring shaft 8 to rotate at high speed. The adhesive is fully mixed by the stirring teeth on the stirring shaft 8. This part of the structure can refer to the mixing head for a CNC sealing dispensing machine disclosed in the prior art with patent publication number CN215141629U.
[0036] The bottom of the stirring shaft 8 is provided with a conical plug 80 for sealing. A sealing seat 9 is provided between the dispensing nozzle 4 and the mixing body 3. The mixing body 3 and the dispensing nozzle 4 are connected by threads to clamp and fix the sealing seat 9. The sealing seat 9 is provided with a through hole 90 connecting the mixing channel 300 and the dispensing channel 400. The upper end of the through hole 90 is provided with a conical groove 900 that mates with the conical plug 80. When the conical plug is in contact with the conical groove, it blocks the flow of glue and prevents dripping; when separated, it allows the glue to pass through, which is a rapid response and solves the problem of delayed sealing in traditional methods.
[0037] The system includes an independent sealing seat 9, which is clamped and fixed by the threaded connection between the mixing body 3 and the dispensing nozzle 4, so as to facilitate quick disassembly and assembly and reduce maintenance costs.
[0038] The outlet end of the dispensing nozzle 4 is provided with an external thread section 401, and a sleeve 10 is threadedly connected to the external thread section 401. The external thread section 401 is provided with multiple slots 402, and the end of the external thread section 401 is provided with a first conical surface. The inner wall of the outlet end of the sleeve 10 is provided with a second conical surface. Rotating the sleeve 10 can squeeze the slots 402 and finely adjust the outlet diameter of the dispensing channel 400.
[0039] like Figure 8 and Figure 9 As shown, this mixing head also includes a glue distributor 11, which is provided with a first glue inlet 12, a second glue inlet 13, a first glue outlet 14, a second glue outlet 15, a first return glue outlet 16, a second return glue outlet 17, a first air valve 18, a second air valve 19, a first air port 20, and a second air port 21. The first glue outlet 14 and the second glue outlet 15 are respectively connected to two glue inlet channels 100. The first air valve 18 is used to control the connection between the first glue inlet 12 and the first glue outlet 14 or the connection between the first glue inlet 12 and the first return glue outlet 16. The second air valve 19 is used to control the connection between the second glue inlet 13 and the second glue outlet 15 or the connection between the second glue inlet 13 and the second return glue outlet 17. The first air port 20 and the second air port 21 are respectively used to supply air to the corresponding air valves to open them. This allows for switching the flow of adhesive: during dispensing, the adhesive enters the mixing head from the inlet through the outlet; during pauses, the adhesive flows back to the supply source through the return outlet, preventing the adhesive from solidifying in the channel and reducing waste and the risk of blockage.
[0040] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this application and are within the spirit and scope of the exemplary embodiments of this application.
[0041] Furthermore, it should be understood that in the foregoing description of the embodiments of this application, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this application. That is, the embodiments in this application can also be understood as an integration of multiple sub-embodiments. It is also valid when each sub-embodiment contains fewer than all the features of a single foregoing disclosed embodiment.
[0042] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.
Claims
1. A mixing head for a dispensing machine, comprising a mixing body, wherein the mixing body is provided with an adhesive inlet channel, a water inlet channel, a mixing channel, and an adhesive outlet channel, and is provided with an adhesive inlet valve assembly and a water inlet valve assembly thereon, characterized in that, The mixing body is provided with an air inlet channel, on which an air inlet valve assembly is provided. The glue inlet channel, water inlet channel, and air inlet channel are respectively connected to the mixing channel. The mixing channel is connected to the glue outlet channel. The glue inlet valve assembly is used to control the opening and closing of the glue inlet channel. The water inlet valve assembly is used to control the opening and closing of the water inlet channel. The air inlet channel is used to blow out the water vapor in the mixing channel.
2. The mixing head of a dispensing machine according to claim 1, characterized in that, There are two glue inlet channels, and two glue inlet valve assemblies arranged in a V-shape on the glue mixing body. The glue inlet valve assembly includes: The first channel is connected to the glue inlet channel and the mixing channel, respectively; A glue valve assembly includes a glue valve cylinder, a glue valve piston, and a glue valve PTFE head. The glue valve cylinder is threadedly connected to a first channel. The glue valve piston is disposed within the glue valve cylinder. The glue valve PTFE head is connected to the glue valve piston. The glue valve PTFE head has a closed position that blocks the glue inlet channel and the mixing channel and an open position that connects the glue inlet channel and the mixing channel. The vent pipe for the PTFE valve is used to supply air to the lower chamber of the PTFE valve cylinder so that the PTFE valve head is in the open position. The air supply pipe for the glue valve is used to supply air to the upper chamber of the glue valve cylinder so that the PTFE head of the glue valve is in the closed position.
3. The mixing head of a dispensing machine according to claim 2, characterized in that, The air intake channel is disposed between the two glue inlet channels, and the air intake valve assembly includes: The valve cylinder body is threadedly connected to the intake passage; The valve piston is located inside the valve cylinder. The valve sealing rod, which is connected to the valve piston, has a closed position that blocks the intake passage from the mixing passage and an open position that connects the intake passage and the mixing passage; The air valve opening pipe is connected to the air intake passage and is used to supply air to the lower chamber of the air valve cylinder so that the air valve sealing rod is in the open position. The air valve shut-off pipe is located on the air valve cylinder and is used to supply air to the upper chamber of the air valve cylinder so that the air valve sealing rod is in the closed position.
4. The mixing head of a dispensing machine according to claim 2, characterized in that, There are two water inlet channels, located on opposite sides of the two glue inlet channels.
5. The mixing head of a dispensing machine according to claim 1, characterized in that, The mixing body includes a channel chamber, a motor frame, a mixing body, and a dispensing nozzle. The motor frame is located at the upper end of the channel chamber, and a drive motor is installed at its upper end. The glue inlet channel, water inlet channel, and air inlet channel are all located inside the channel chamber. The glue inlet valve assembly, water inlet valve assembly, and air inlet valve assembly are all located on the channel chamber. The mixing channel is located inside the mixing body. The mixing body is threadedly connected to the lower end of the channel chamber. The dispensing channel is located inside the dispensing nozzle.
6. The mixing head of a dispensing machine according to claim 5, characterized in that, The motor frame is equipped with a shaft-driven sealing assembly and a sealing air pipe connector. The upper part of the shaft-driven sealing assembly is connected to the output shaft of the drive motor, and the lower part is connected to a stirring shaft. The stirring shaft is rotatably positioned in the mixing channel.
7. The mixing head of a dispensing machine according to claim 6, characterized in that, The bottom of the stirring shaft is provided with a conical plug for sealing the adhesive. A sealing seat is provided between the dispensing nozzle and the mixing body. The mixing body and the dispensing nozzle are connected by threads to clamp and fix the sealing seat. The sealing seat is provided with a through hole that connects the mixing channel and the dispensing channel. The upper end of the through hole is provided with a conical groove that matches the conical plug.
8. A mixing head for a dispensing machine according to claim 5, 6, or 7, characterized in that, The outlet end of the dispensing nozzle is provided with an external thread section, a sleeve is threadedly connected to the external thread section, multiple slots are provided on the external thread section, a first conical surface is provided at the end of the external thread section, and a second conical surface is provided on the inner wall of the outlet end of the sleeve.
9. A mixing head for a dispensing machine according to claim 1 or 3, characterized in that, The intake channel is inclined downward relative to the mixing channel, and the angle of inclination is 45°-65°.
10. The mixing head of a dispensing machine according to claim 2, characterized in that, It also includes an adhesive distributor, which is provided with a first adhesive inlet, a second adhesive inlet, a first adhesive outlet, a second adhesive outlet, a first return adhesive outlet, a second return adhesive outlet, a first air valve, a second air valve, a first air port, and a second air port. The first adhesive outlet and the second adhesive outlet are respectively connected to two adhesive inlet channels. The first air valve is used to control the connection between the first adhesive inlet and the first adhesive outlet or between the first adhesive inlet and the first return adhesive outlet. The second air valve is used to control the connection between the second adhesive inlet and the second adhesive outlet or between the second adhesive inlet and the second return adhesive outlet.