A fine glue spray gun and glue spraying method thereof

Abstract

The present invention relates to a fine glue spray gun, comprising a gun body and a gun nozzle, wherein the gun nozzle is arranged at the lower end of the gun body, and is characterized in that: it also comprises an air knife nozzle; the air knife nozzle is detachably mounted at the lower end of the gun body and is located outside the gun nozzle, the gun body is provided with two oppositely arranged air inlet channels, the air knife nozzle is provided with two air outlet channels and two strip-shaped air knife edges, the air outlet channels are connected with the corresponding air inlet channels, and the two strip-shaped air knife edges are respectively located at both sides of the gun nozzle and are arranged in the horizontal direction. The present invention also provides a glue spraying method for the above-mentioned fine glue spray gun. The fine glue spray gun can spray fine glue threads, accurately glue the edge of the upper, make the glue layer at the edge of the upper evenly distributed, avoid glue spraying onto the upper, and improve the finished product rate of shoes.

Description

Technical Field

[0001] The invention relates to shoe-making equipment, in particular to a fine glue spraying gun and a glue spraying method thereof. Background Art

[0002] In the shoe manufacturing industry, the sole and the upper are generally produced separately, and then the sole and the upper are glued together. Therefore, a glue layer needs to be pre-coated on the edge of the upper. The glue layer needs to meet certain width requirements and cannot completely cover the edge of the upper. The traditional gluing process of the upper edge is manual gluing, which requires a gluing line to be drawn on a marking machine or by workers, and then the uppers are held one by one by hand and glued one by one through the gluing device. This manual gluing operation is not only costly and inefficient, but also the quality of each gluing is easily unstable, which can easily cause uneven spraying: the width of the glue layer is uneven; some upper edges are sprayed too much, and the glue is easy to drip onto the upper, causing glue waste; some upper edges are sprayed too little, which can easily cause the upper edge and the sole to be loosely bonded in the later stage.

[0003] At present, many companies in the industry use automated glue spraying equipment for shoe production, which improves production efficiency on the one hand and reduces the contact between operators and chemical reagents on the other hand, reducing the chance of physical injury. However, most automated sole glue spraying equipment uses spray guns of different calibers, and uses the movement of the manipulator to automatically spray glue on the upper. Since the direct glue spraying of the spray gun is a divergent spray, not only is the glue prone to uneven distribution, but the glue is also easy to spray onto the upper, affecting the quality of the shoes, and even causing some shoes with high requirements for the upper to be directly scrapped. Summary of the invention

[0004] The problem to be solved by the present invention is to provide a fine glue spray gun, which can spray fine glue threads to accurately glue the edge of the upper, so that the glue layer on the edge of the upper is evenly distributed, avoids glue spraying onto the upper, and improves the finished product rate of shoes.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] A fine glue spray gun comprises a gun body and a gun nozzle, wherein the gun nozzle is arranged at the lower end of the gun body, and is characterized in that: it also comprises an air knife nozzle; the air knife nozzle is detachably mounted at the lower end of the gun body and is located on the outer side of the gun nozzle, the gun body is provided with two oppositely arranged air inlet channels, the wind knife nozzle is provided with two air outlet channels and two strip-shaped air knife openings, the air outlet channels are connected with the corresponding air inlet channels, and the two strip-shaped air knife openings are respectively located on both sides of the gun nozzle and are arranged in the horizontal direction.

[0007] Two oppositely arranged air inlet channels are arranged inside the gun body, two air outlet channels and two strip air knife edges are arranged on the air knife mouth, and the two strip air knife edges are respectively located on both sides of the gun mouth. When the air inlet channel is connected to an external air source, the wind blown out by the wind source is blown out from the two air inlet channels to the corresponding air outlet channels and the strip air knife edges, forming two wind curtains blowing vertically downward. Since the two strip air knife edges are located on the outside of the gun mouth, no matter how the entire glue spray gun rotates, the glue thread sprayed from the gun mouth is blocked by the two wind curtains, so that the sprayed glue thread will not be sprayed and spread, ensuring that the sprayed glue thread is very fine, and the predetermined glue thread width is exactly blown out, so that the edge of the upper can be glued accurately, the glue layer at the edge of the upper is evenly distributed, and glue is prevented from being sprayed onto the upper, thereby improving the yield of shoes.

[0008] As a preferred solution of the present invention, the lower end of the gun nozzle has a strip-shaped glue outlet, which is arranged in the horizontal direction and is perpendicular to the strip-shaped air knife edge, and the strip-shaped glue outlet and the two strip-shaped air knife edges form an "I"-shaped structure. The length of the strip-shaped glue outlet is used to set the width of the sprayed glue thread. This "I"-shaped structure is an integral structure and will not change with the movement and turning of the glue spray gun, so that the two air curtains are always on both sides of the sprayed glue thread.

[0009] As a further preferred embodiment of the present invention, the length direction of the strip-shaped glue outlet is perpendicular to the moving direction of the fine glue spray gun. Through this arrangement, during the movement of the fine glue spray gun, it can be ensured that glue will not be sprayed onto the upper in the length direction of the strip-shaped glue outlet.

[0010] As a preferred solution of the present invention, at least two through holes are provided on the air knife nozzle, and at least two screw holes are provided at the lower end of the gun body, the number of the screw holes and the through holes is the same and they correspond one to one, screws are installed in the screw holes, the screw rods pass through the corresponding through holes, and the heads of the screws and the lower end surface of the gun body clamp the air knife nozzle together. Through this arrangement, the air knife nozzle can be detachably installed at the lower end of the gun body.

[0011] As a preferred embodiment of the present invention, the gun body is provided with a glue feed channel, a glue outlet channel and an air inlet channel, the glue feed channel is connected with the glue outlet channel, a core shaft is provided in the glue outlet channel and the core shaft can move axially in the glue outlet channel; the gun nozzle is provided with an air outlet channel and a vertically arranged small glue outlet channel, the upper end of the small glue outlet channel is connected with the glue outlet channel, the lower end of the small glue outlet channel is connected with the strip-shaped glue outlet, the upper air inlet of the air outlet channel is connected with the air inlet channel, and the lower air outlet of the air outlet channel is connected with the middle of the small glue outlet channel. When the air inlet channel is connected to an external air source and the glue feed channel is connected to an external glue source, the airflow blown by the air source blows from the air inlet channel to the air outlet channel into the small glue outlet channel, so that the glue in the small glue outlet channel can be ejected from the strip-shaped glue outlet at a higher pressure.

[0012] As a further preferred embodiment of the present invention, the air outlet channel includes an annular air channel and a cone-ring air channel that is larger at the top and smaller at the bottom, the annular air channel is located above the cone-ring air channel, and both the annular air channel and the cone-ring air channel are located outside the small glue outlet flow channel; the annular air channel is connected to the air inlet channel, the upper air inlet of the cone-ring air channel is connected to the annular air channel, and the lower air outlet of the cone-ring air channel is connected to the middle of the small glue outlet flow channel. The air inlet channel blows the airflow to the annular air channel and the cone-ring air channel in sequence, so that the airflow can be evenly blown to the small glue outlet flow channel, and the glue in the small glue outlet flow channel is sprayed 360 degrees.

[0013] As a further preferred embodiment of the present invention, a driving device is further included, the driving device is mounted on the upper end of the gun body, and the upper end of the mandrel is in transmission connection with the power output end of the driving device. The driving device drives the mandrel to move axially in the glue outlet channel, thereby controlling the opening or closing of the strip glue outlet and controlling the glue outlet amount.

[0014] As a further preferred embodiment of the present invention, the driving device includes a cylinder seat, a cylinder and a sealing ring. The cylinder seat is installed at the upper end of the gun body, a vertical inner cavity is provided inside the cylinder seat, the cylinder is installed above the cylinder seat, the piston rod of the cylinder is arranged downward and extends into the vertical inner cavity; the vertical inner cavity is connected to the glue outlet channel, the upper end of the mandrel extends into the vertical inner cavity from below and is drivingly connected with the piston rod end of the cylinder, the sealing ring is sleeved on the mandrel and fixed at the lower end outlet of the vertical inner cavity. The mandrel is driven by the cylinder to perform axial movement in the vertical inner cavity and the glue outlet channel.

[0015] As a further preferred solution of the present invention, a first locking nut, a diaphragm plate and a second locking nut are provided between the lower end outlet of the vertical inner cavity and the glue outlet channel, the first locking nut, the diaphragm plate and the second locking nut are sequentially sleeved on the mandrel from top to bottom, and the diaphragm plate is fixed on the mandrel through the cooperation of the first locking nut and the second locking nut. The lower end outlet of the vertical inner cavity is separated from the glue outlet channel by the diaphragm plate, and the glue in the glue outlet channel will not flow to the lower end outlet of the vertical inner cavity.

[0016] As a further preferred embodiment of the present invention, the material of the diaphragm plate is polytetrafluoroethylene. The polytetrafluoroethylene is abbreviated as PTFE, commonly known as the "king of plastics", and is a high molecular polymer obtained by polymerization of tetrafluoroethylene as a monomer. It has good sealing and high non-stickiness, is the material with the lowest surface tension among solid materials, and does not adhere to any substance. Since polytetrafluoroethylene is non-sticky, the glue in the glue outlet channel will not adhere to the lower surface of the diaphragm plate, avoiding blockage of the glue outlet channel.

[0017] As a preferred solution of the present invention, the gun nozzle is detachably mounted on the lower end of the gun body; the lower end of the gun body is provided with an annular groove capable of accommodating the gun nozzle, the opening of the annular groove is arranged downward, the inner side wall of the annular groove is provided with an internal thread, the outer side wall of the gun nozzle is provided with an external thread matching the internal thread, and the gun nozzle is arranged in the annular groove through the cooperation of the external thread and the internal thread. Through this arrangement, the gun nozzle can be detachably mounted on the lower end of the gun body, which is convenient for replacing or unclogging the gun nozzle.

[0018] As a preferred solution of the present invention, an air inlet connector and an air volume regulating valve are provided on the outside of the gun body, the air outlet of the air inlet connector is connected to the air inlet channel, and the air volume regulating valve is installed on the air inlet connector and can control the air volume of the air inlet connector. The air inlet of the air inlet connector is connected to an external air source, and the air volume regulating valve is used to adjust the air volume of the air inlet connector.

[0019] As a preferred embodiment of the present invention, an air inlet connector and a glue spraying airflow regulating valve are provided on the outside of the gun body, the air outlet of the air inlet connector is connected to the air inlet channel, and the glue spraying airflow regulating valve is installed on the air inlet connector and can control the air intake volume of the air inlet connector.

[0020] As a preferred solution of the present invention, a glue joint is provided on the outer side of the gun body, and a glue outlet of the glue joint is communicated with the glue inlet channel.

[0021] A glue spraying method, characterized in that two strip-shaped air blades are arranged on both sides of a glue spray gun nozzle, the two strip-shaped air blades generate two wind curtains on both sides of the glue sprayed out during glue spraying, the two wind curtains move and turn with the glue spray gun, and the two wind curtains block the diffusion of the sprayed glue.

[0022] As a preferred embodiment of the present invention, the glue spraying method adopts the above-mentioned fine glue spraying gun.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] This fine glue spray gun can spray out fine glue threads and accurately apply glue to the edge of the upper, so that the glue layer on the edge of the upper is evenly distributed, avoiding glue spraying onto the upper and improving the yield of shoes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention;

[0026] Figure 2 yes Figure 1 Bottom view of . DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1-2As shown, the fine glue spray gun in this embodiment includes a gun body 1, a gun nozzle 2 and an air knife nozzle 3. The gun nozzle 2 is arranged at the lower end of the gun body 1, and the air knife nozzle 3 is detachably installed at the lower end of the gun body 1 and is located on the outside of the gun nozzle 2. The gun body 1 is provided with two oppositely arranged air inlet channels 11, and the air knife nozzle 3 is provided with two air outlet channels 31 and two strip-shaped air knife edges 32. The air outlet channels 31 are connected to the corresponding air inlet channels 11, and the two strip-shaped air knife edges 32 are respectively located on both sides of the gun nozzle 2 and are arranged in the horizontal direction.

[0029] The nozzle 2 has a strip-shaped glue outlet 21, which is arranged in the horizontal direction and perpendicular to the strip-shaped air knife 32. The strip-shaped glue outlet 21 and the two strip-shaped air knife 32 form an "I"-shaped structure. The length of the strip-shaped glue outlet 21 is used to set the width of the sprayed glue thread. This "I"-shaped structure is an integral structure and will not change with the movement and turning of the glue gun, so that the two air curtains are always on both sides of the sprayed glue thread.

[0030] The length direction of the strip-shaped glue outlet 21 is perpendicular to the moving direction of the fine glue spray gun. Through this arrangement, during the moving process of the fine glue spray gun, it can be ensured that in the length direction of the strip-shaped glue outlet 21, glue will not be sprayed onto the upper.

[0031] The air knife nozzle 3 is provided with three through holes 33, and the lower end of the gun body 1 is provided with three screw holes 12, in which screws 13 are installed, and the rods of the screws 13 pass through the corresponding through holes 33, and the heads of the screws 13 and the lower end surface of the gun body 1 jointly clamp the air knife nozzle 3. Through this arrangement, the air knife nozzle 3 can be detachably installed at the lower end of the gun body 1.

[0032] The gun body 1 is provided with a glue inlet channel 14, a glue outlet channel 15 and an air inlet channel 16. The glue inlet channel 14 is connected to the glue outlet channel 15. A core shaft 17 is provided in the glue outlet channel 15 and the core shaft 17 can move axially in the glue outlet channel 15. The gun nozzle 2 is provided with an air outlet channel 22 and a vertically arranged small glue outlet channel 23. The upper end of the small glue outlet channel 23 is connected to the glue outlet channel 15, and the lower end of the small glue outlet channel 23 is connected to the strip-shaped glue outlet 21. The upper air inlet of the air outlet channel 22 is connected to the air inlet channel 16, and the lower air outlet of the air outlet channel 22 is connected to the middle of the small glue outlet channel 23. When the air inlet channel 16 is connected to an external air source and the glue inlet channel 14 is connected to an external glue source, the air flow blown by the air source blows from the air inlet channel 16 to the air outlet channel 22 to the small glue outlet channel 23, so that the glue in the small glue outlet channel 23 can be ejected from the strip-shaped glue outlet 21 at a higher pressure.

[0033] The air outlet channel 22 includes an annular air channel 221 and a cone-ring air channel 222 with a larger upper portion and a smaller lower portion. The annular air channel 221 is located above the cone-ring air channel 222, and both the annular air channel 221 and the cone-ring air channel 222 are located outside the glue outlet small flow channel 23. The annular air channel 221 is connected to the air inlet channel 16, the upper air inlet of the cone-ring air channel 222 is connected to the annular air channel 221, and the lower air outlet of the cone-ring air channel 222 is connected to the middle of the glue outlet small flow channel 23. The air inlet channel 16 blows the air flow to the annular air channel 221 and the cone-ring air channel 222 in sequence, so that the air flow can be evenly blown to the glue outlet small flow channel 23, and the glue in the glue outlet small flow channel 23 is sprayed 360 degrees.

[0034] The fine glue spray gun further includes a driving device 4, which is mounted on the upper end of the gun body 1, and the upper end of the mandrel 17 is drivingly connected to the power output end of the driving device 4. The driving device 4 drives the mandrel 17 to move axially in the glue outlet channel 15, thereby controlling the opening or closing of the strip glue outlet 21 and controlling the glue outlet amount.

[0035] The driving device 4 includes a cylinder seat 41, a cylinder 42 and a sealing ring 43. The cylinder seat 41 is installed at the upper end of the gun body 1. A vertical inner cavity 411 is provided inside the cylinder seat 41. The cylinder 42 is installed above the cylinder seat 41. The piston rod of the cylinder 42 is arranged downward and extends into the vertical inner cavity 411. The vertical inner cavity 411 is connected with the glue outlet channel 15. The upper end of the mandrel 17 extends into the vertical inner cavity 411 from the bottom and is drivingly connected with the piston rod end of the cylinder 42. The sealing ring 43 is sleeved on the mandrel 17 and fixed at the lower end outlet of the vertical inner cavity 411. The mandrel 17 is driven by the cylinder 42 to perform axial movement in the vertical inner cavity 411 and the glue outlet channel 15.

[0036] A first locking nut 5, a diaphragm plate 6 and a second locking nut 7 are provided between the lower end outlet of the vertical inner cavity 411 and the glue outlet channel 15. The first locking nut 5, the diaphragm plate 6 and the second locking nut 7 are sequentially sleeved on the core shaft 17 from top to bottom, and the diaphragm plate 6 is fixed on the core shaft 17 by the cooperation of the first locking nut 5 and the second locking nut 7. The lower end outlet of the vertical inner cavity 411 is separated from the glue outlet channel 15 by the diaphragm plate 6, and the glue in the glue outlet channel 15 will not flow to the lower end outlet of the vertical inner cavity 411.

[0037] The material of the diaphragm plate 6 is polytetrafluoroethylene. The polytetrafluoroethylene is abbreviated as PTFE, commonly known as the "king of plastics". It is a high molecular polymer obtained by polymerization of tetrafluoroethylene as a monomer. It has good sealing and high non-stickiness. It has the lowest surface tension among solid materials and does not adhere to any substance. Since polytetrafluoroethylene is non-sticky, the glue in the glue outlet channel 15 will not adhere to the lower surface of the diaphragm plate 6, avoiding clogging of the glue outlet channel 15.

[0038] The gun nozzle 2 is detachably mounted on the lower end of the gun body 1; the lower end of the gun body 1 is provided with an annular groove 18 capable of accommodating the gun nozzle 2, the opening of the annular groove 18 is arranged downward, the inner side wall of the annular groove 18 is provided with an internal thread, the outer side wall of the gun nozzle 2 is provided with an external thread matching the internal thread, and the gun nozzle 2 is arranged in the annular groove 18 through the cooperation of the external thread and the internal thread. Through this arrangement, the gun nozzle 2 can be detachably mounted on the lower end of the gun body 1, which is convenient for replacing or unclogging the gun nozzle 2.

[0039] An air inlet connector 8 and an air volume regulating valve 9 are provided on the outside of the gun body 1. The air outlet of the air inlet connector 8 is connected to the air inlet channel 11. The air volume regulating valve 9 is installed on the air inlet connector 8 and can control the air volume of the air inlet connector 8. The air inlet of the air inlet connector 8 is connected to an external air source, and the air volume regulating valve 9 is used to adjust the air volume of the air inlet connector 8.

[0040] An air inlet connector 101 and a glue spraying air flow regulating valve 102 are provided on the outside of the gun body 1 . The air outlet of the air inlet connector 101 is connected to the air inlet channel 16 . The glue spraying air flow regulating valve 102 is installed on the air inlet connector 101 and can control the air intake volume of the air inlet connector 101 .

[0041] A glue joint 103 is provided on the outer side of the gun body 1 , and a glue outlet of the glue joint 103 is communicated with the glue inlet channel 14 .

[0042] The glue spraying method of the above-mentioned fine glue spray gun is as follows: two strip-shaped wind blades 32 are set on both sides of the gun nozzle 2 of the glue spray gun. The two strip-shaped wind blades 32 generate two wind curtains on both sides of the glue sprayed out while spraying glue. The two wind curtains move with the movement and turning of the glue spray gun, and the two wind curtains block the diffusion of the sprayed glue.

[0043] Two oppositely arranged air inlet channels 11 are arranged inside the gun body 1, and two air outlet channels 31 and two strip air knife edges 32 are arranged on the air knife mouth 3, and the two strip air knife edges 32 are respectively located on both sides of the gun mouth 2. When the air inlet channel 11 is connected to an external wind source, the wind blown out by the wind source is blown out from the two air inlet channels 11 to the corresponding air outlet channels 31 and the strip air knife edges 32, forming two wind curtains blowing vertically downward. Since the two strip air knife edges 32 are located on the outside of the gun mouth 2, no matter how the entire glue spray gun rotates, the glue threads sprayed from the gun mouth 2 are blocked by the two wind curtains, so that the sprayed glue threads will not be sprayed and spread, ensuring that the sprayed glue threads are very fine, and the predetermined glue thread width is exactly the width of the glue thread blown out, so that the edge of the upper can be accurately glued, the glue layer at the edge of the upper is evenly distributed, and glue is prevented from being sprayed onto the upper, thereby improving the yield of shoes.

[0044] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. The technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A fine glue spray gun, comprising a gun body and a gun nozzle, wherein the gun nozzle is arranged at the lower end of the gun body, and is characterized in that: It also includes an air knife nozzle; the air knife nozzle is detachably mounted at the lower end of the gun body and is located outside the gun nozzle, the gun body is provided with two oppositely arranged air inlet channels, the air knife nozzle is provided with two air outlet channels and two strip-shaped air knife openings, the air outlet channels are connected to the corresponding air inlet channels, and the two strip-shaped air knife openings are respectively located on both sides of the gun nozzle and are arranged in the horizontal direction; The length direction of the strip-shaped glue outlet is perpendicular to the moving direction of the fine glue spray gun; The gun body is provided with a glue inlet channel, a glue outlet channel and an air inlet channel, the glue inlet channel is connected with the glue outlet channel, a core shaft is provided in the glue outlet channel and the core shaft can move axially in the glue outlet channel; the gun nozzle is provided with an air outlet channel and a vertically arranged small glue outlet channel, the upper end of the small glue outlet channel is connected with the glue outlet channel, the lower end of the small glue outlet channel is connected with the strip-shaped glue outlet, the upper end air inlet of the air outlet channel is connected with the air inlet channel, and the lower end air outlet of the air outlet channel is connected with the middle part of the small glue outlet channel; An air inlet connector and an air volume regulating valve are provided on the outside of the gun body, the air outlet of the air inlet connector is communicated with the air inlet channel, and the air volume regulating valve is installed on the air inlet connector and can control the air volume of the air inlet connector; An air inlet joint and a glue spraying air flow regulating valve are provided on the outside of the gun body, an air outlet of the air inlet joint is communicated with the air inlet passage, and the glue spraying air flow regulating valve is installed on the air inlet joint and can control the air intake amount of the air inlet joint; A glue joint is provided on the outside of the gun body, and a glue outlet of the glue joint is connected to the glue inlet channel; The air outlet channel includes an annular air channel and a conical ring air channel which is larger at the top and smaller at the bottom. The annular air channel is located above the conical ring air channel, and both the annular air channel and the conical ring air channel are located outside the small glue outlet flow channel. The annular air channel is connected to the air inlet channel, the upper air inlet of the conical ring air channel is connected to the annular air channel, and the lower air outlet of the conical ring air channel is connected to the middle of the small glue outlet flow channel.

2. The fine glue spray gun according to claim 1, characterized in that: The lower end of the gun nozzle is provided with a strip-shaped glue outlet, which is arranged in the horizontal direction and is perpendicular to the strip-shaped wind knife edge. The strip-shaped glue outlet and the two strip-shaped wind knife edges form an "I"-shaped structure.

3. The fine glue spray gun according to claim 1, characterized in that: It also includes a driving device, which is installed on the upper end of the gun body, and the upper end of the core shaft is transmission-connected to the power output end of the driving device; the driving device includes a cylinder seat, a cylinder and a sealing ring, the cylinder seat is installed on the upper end of the gun body, a vertical inner cavity is provided inside the cylinder seat, the cylinder is installed above the cylinder seat, and the piston rod of the cylinder is arranged downward and extends into the vertical inner cavity; the vertical inner cavity is connected to the glue outlet channel, the upper end of the core shaft extends into the vertical inner cavity from below and is transmission-connected to the end of the piston rod of the cylinder, and the sealing ring is sleeved on the core shaft and fixed at the lower end outlet of the vertical inner cavity.

4. The fine glue spray gun according to claim 3, characterized in that: A first locking nut, a diaphragm plate and a second locking nut are provided between the lower end outlet of the vertical inner cavity and the glue outlet channel. The first locking nut, the diaphragm plate and the second locking nut are sequentially sleeved on the core shaft from top to bottom, and the diaphragm plate is fixed on the core shaft by the cooperation of the first locking nut and the second locking nut; the material of the diaphragm plate is polytetrafluoroethylene.

5. The fine glue spray gun according to claim 1, characterized in that: The air knife nozzle is provided with at least two through holes, and the lower end of the gun body is provided with at least two screw holes, the number of the screw holes and the through holes is the same and one-to-one corresponding, screws are installed in the screw holes, the screw rods pass through the corresponding through holes, and the heads of the screws and the lower end surface of the gun body jointly clamp the air knife nozzle; The gun nozzle is detachably mounted on the lower end of the gun body; an annular groove capable of accommodating the gun nozzle is provided at the lower end of the gun body, the opening of the annular groove is arranged downward, the inner side wall of the annular groove is provided with an internal thread, the outer side wall of the gun nozzle is provided with an external thread matching the internal thread, and the gun nozzle is arranged in the annular groove through the cooperation of the external thread and the internal thread.

6. The glue spraying method of the fine glue spray gun according to any one of claims 1 to 5, characterized in that: Two strip-shaped wind blades are arranged on both sides of the nozzle of the glue spray gun. The two strip-shaped wind blades generate two wind curtains on both sides of the glue sprayed while spraying the glue. The two wind curtains move with the movement and turning of the glue spray gun, and the two wind curtains block the diffusion of the sprayed glue.

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