Curved screen hot melting gluing machine

Abstract

The invention relates to the technical field of screen gluing, in particular to a curved screen hot melting gluing machine which comprises a fixed base, a supporting plate, a glue dispenser and a moving assembly. A moving assembly is mounted on the fixed base; the moving assembly is connected with a supporting plate. The moving assembly is connected with a glue dispenser; hot melt glue is stored in the glue dispenser; the supporting plate is driven to move back and forth through the moving assembly, and the glue dispenser can be driven to move up and down and left and right; the lower side of the dispenser is communicated with a dispensing pipe; and an electric control valve is arranged between the dispensing device and the dispensing pipe. The hot melt adhesive coated on the curved-surface frame is blown through airflow, so that overflow of the hot melt adhesive is delayed through the airflow, the situation that the mobile phone frame is polluted due to large-range diffusion of the hot melt adhesive is prevented, meanwhile, downward overflow and dispersion of the hot melt adhesive are avoided, and the bonding effect on the curved-surface screen is effectively improved; and the curved screen is manually attached to the mobile phone frame, and assembling of the curved screen is completed.

Description

Technical Field

[0001] The invention relates to the technical field of screen gluing, and in particular to a hot-melt gluing machine for curved screens. Background Art

[0002] The mobile phone screen and the mobile phone frame are usually assembled by applying hot melt glue on the edge of the mobile phone frame, and then quickly combining the mobile phone screen and the mobile phone frame manually before the hot melt glue solidifies. In this process, a glue coater (also known as a glue dispensing machine) is usually used to apply hot melt glue on the position of the mobile phone frame. However, some existing mobile phones have curved screens. When hot melt glue is applied to the curved part of the mobile phone frame, a small amount of hot melt glue will overflow and diffuse along the curved part, causing the hot melt glue to flow to the position of the mobile phone frame where no hot melt glue is needed, resulting in contamination of the mobile phone frame and subsequent difficulty in cleaning. At the same time, during assembly, it is also necessary to manually locate the assembly position of the mobile phone screen, which makes assembly difficult and positioning difficult, and is prone to inaccurate assembly misalignment, thereby reducing product quality. Summary of the invention

[0003] In order to overcome the disadvantages that when using a glue coating machine to coat hot melt glue on the edge of the curved screen mobile phone frame, a small amount of hot melt glue will overflow and diffuse along the curved surface, causing the mobile phone frame to be contaminated and subsequent cleaning to be difficult, and at the same time, when assembling the screen, it is necessary to manually locate the assembly position of the mobile phone screen, resulting in great difficulty in assembly, difficult positioning, and easy to cause inaccurate assembly dislocation problems, thereby reducing product quality, the present invention provides a curved screen hot melt glue coating machine.

[0004] The technical solution is as follows: a hot melt glue coating machine for curved screen, comprising a glue dispenser and a mobile component; the mobile component is installed on the glue dispenser; the frame of a mobile phone is placed on the glue dispenser; the left and right edges of the frame of the mobile phone are curved frames; the front and rear edges of the frame of the mobile phone are straight frames; it is characterized in that it also includes a first limit plate, a second limit plate, a blowing component and a cleaning system; a first limit plate is installed on the left and right sides of the glue dispenser to prevent the hot melt glue from flowing downward along the surface of the curved frame; a first exhaust groove is arranged on the opposite sides of the two first limit plates; a first limit plate is opened on the opposite sides of the two first limit plates an air inlet, and each first air inlet is communicated with an adjacent first exhaust groove; a second limit plate is installed on the front and rear sides of the glue dispensing machine; a second exhaust groove is arranged on the opposite sides of the two second limit plates; a second air inlet is opened on the two second limit plates (opposite to each other), and each second air inlet is communicated with an adjacent second exhaust groove; an air blowing component for preventing hot melt adhesive from overflowing is installed on the glue dispensing machine; the air blowing component is communicated with an external air supply device, and the air blowing component is communicated with each first air inlet and each second air inlet; a cleaning system for preventing hot melt adhesive from clogging the glue dispensing machine is connected to the glue dispensing machine.

[0005] Preferably, the blowing assembly includes a connecting pipe, an electrically controlled three-way valve and a first air supply pipe; a connecting pipe is fixedly connected to the support plate; one end of the connecting pipe is connected to an external air supply device; the other end of the connecting pipe is connected to the electrically controlled three-way valve; the electrically controlled three-way valve is connected to the first air supply pipe; the first air supply pipe is connected to four branches; each branch is connected to the adjacent first air inlet and the second air inlet.

[0006] Preferably, the facing sides of the two first limiting plates are arranged to be aligned with the outer edge of the curved frame, and the facing sides of the two second limiting plates are arranged to be aligned with the outer edge of the straight frame.

[0007] Preferably, each first limiting plate is provided with a first inclined surface; each second limiting plate is provided with a second inclined surface.

[0008] Preferably, the cleaning system includes a cleaner; a cleaner and a water pipe are fixedly connected to the support plate; a collecting chamber is provided in the cleaner; a cleaning agent for cleaning residual glue on the dispensing tube is stored in the collecting chamber; the cleaner is connected to a water pipe; and the water pipe is connected to an external water supply device.

[0009] Preferably, the cleaning system further comprises a second air supply pipe; a cavity is provided in the cleaning device; the second air supply pipe is connected between the cavity and the electrically controlled three-way valve; a plurality of exhaust holes are provided in the cleaning device wall; and all the exhaust holes are connected to the cavity.

[0010] Preferably, the plurality of exhaust holes are arranged in a ring shape.

[0011] Preferably, the shape of the cleaning device is circular.

[0012] Preferably, the cleaning system further comprises a support rod and a cover plate; a plurality of support rods are fixedly connected to the cleaning device; a cover plate is commonly fixedly connected to the plurality of support rods; and a through hole is provided at the center of the cover plate.

[0013] Preferably, the support rod is configured as a spring telescopic rod.

[0014] The beneficial effects of the present invention are: When the hot melt adhesive is applied on the curved frame, the airflow blows toward the hot melt adhesive applied on the curved frame, thereby delaying the overflow of the hot melt adhesive and preventing it from spreading over a large area, which causes the mobile phone frame to be contaminated. At the same time, the hot melt adhesive is prevented from overflowing and dispersing downward, effectively improving the bonding effect on the curved screen. After the hot melt adhesive is applied, the curved screen is manually attached to the mobile phone frame to complete the assembly of the curved screen. The airflow is blown to the curved frame and the straight frame respectively and continuously to prevent dust and other impurities in the air from adhering to the hot melt adhesive, thereby preventing the viscosity of the hot melt adhesive from decreasing due to the attachment of impurities. Compared with conventional bonding methods, after the hot melt adhesive is applied, no additional alignment operation is required. The curved screen only needs to be placed between the first limiting plate and the second limiting plate to achieve rapid alignment of the curved screen, greatly improving the speed of bonding the curved screen and improving the tightness of the connection between the curved screen and the phone frame. Compared with the conventional method of replacing the dispensing tube, the solidified hot melt adhesive in the dispensing tube is heated and treated with a cleaning agent to avoid the operation of replacing the dispensing tube, thereby avoiding the reciprocating shutdown and glue output adjustment work, improving the efficiency of handling dispensing tube blockage and reducing the workload of staff in repairing the dispensing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the curved screen hot melt glue coating machine of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the support plate, the blowing assembly and the glue dispenser of the present invention; Figure 3 It is a front view of the combination of the support plate, the glue dispenser and the first limit plate of the present invention, wherein the first limit plate is processed in section; Figure 4 is a cross-sectional view of the first limiting plate of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the support plate, the glue dispenser and the second limit plate combined according to the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the combination of the support plate and the second limiting plate of the present invention, wherein the second limiting plate is processed in cross section; Figure 7 It is a schematic diagram of the three-dimensional structure of the cleaning system of the present invention; Figure 8 It is a cross-sectional view of the cleaning device of the present invention.

[0016] Description of the reference numerals: 1-fixed base, 2-support plate, 3-glue dispenser, 3001-glue dispenser tube, 4-mobile phone frame, 4001-curved frame, 4002-straight frame, 4003-glue coating part, 5-first limiting plate, 5001-first exhaust groove, 5002-first air inlet, 5003-first inclined plane, 6-second limiting plate, 6001-second exhaust groove, 6002-second air inlet, 6003-second inclined plane, 201-first slide rail, 202-first electric slide Block, 203-second slide rail, 204-second electric slider, 205-fixed plate, 206-third slide rail, 207-third electric slider, 301-connecting pipe, 302-electrically controlled three-way valve, 303-first gas pipe, 30301-branch pipe, 401-cleaner, 40101-collecting chamber, 40102-cavity, 40103-exhaust hole, 402-second gas pipe, 403-water pipe, 404-support rod, 405-cover plate, 40501-through hole. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Example 1

[0018] like Figure 1-Figure 6 As shown, a hot melt glue coating machine for curved screen includes a glue dispenser and a moving component; the glue dispenser consists of a fixed base 1, a support plate 2 and a glue dispenser 3; the moving component is installed on the fixed base 1; the support plate 2 is connected to the moving component; the glue dispenser 3 is connected to the moving component; hot melt glue is stored in the glue dispenser 3; the support plate 2 is driven to move forward and backward by the moving component, and the glue dispenser 3 can be driven to move up and down and left and right; the lower side of the glue dispenser 3 is connected to a glue dispenser tube 3001; an electric control valve is arranged between the glue dispenser 3 and the glue dispenser tube 3001; the mobile phone frame 4 is placed on the support plate 2; the left and right edges of the mobile phone frame 4 are curved frames 4001; the front and rear edges of the mobile phone frame 4 are straight frames 4002; It also includes a first limiting plate 5, a second limiting plate 6, a blowing assembly and a cleaning system; a first limiting plate 5 is installed on the left and right sides of the support plate 2; a first exhaust groove 5001 is arranged on the opposite sides of the two first limiting plates 5; a first air inlet 5002 is opened on the opposite sides of the two first limiting plates 5, and each first air inlet 5002 is connected to the adjacent first exhaust groove 5001; a second limiting plate 6 is installed on the front and rear sides of the support plate 2; a second exhaust groove 6001 is arranged on the opposite sides of the two second limiting plates 6; a second air inlet 6002 is opened on the opposite sides of the two second limiting plates 6, and each second air inlet 6002 is connected to the adjacent second exhaust groove 6001; a blowing assembly is installed on the support plate 2; the blowing assembly is connected to the external air supply device, and the blowing assembly is connected to each first air inlet 5002 and each second air inlet 6002; a cleaning system is connected to the lower side of the glue dispenser 3.

[0019] The moving assembly includes a first slide rail 201, a first electric slider 202, a second slide rail 203, a second electric slider 204, a fixed plate 205, a third slide rail 206 and a third electric slider 207; the first slide rail 201 is fixedly connected to the lower side of the fixed base 1; the first electric slider 202 is slidably connected to the first slide rail 201; the first electric slider 202 is fixedly connected to the support plate 2; the second slide rail 203 is fixedly connected to the upper side of the fixed base 1; the second electric slider 204 is slidably connected to the second slide rail 203; the fixed plate 205 is fixedly connected to the second electric slider 204; the third slide rail 206 is fixedly connected to the fixed plate 205; the third slide rail 206 is slidably connected to the third electric slider 207; the third electric slider 207 is fixedly connected to the glue dispenser 3.

[0020] The blowing assembly includes a connecting pipe 301, an electrically controlled three-way valve 302 and a first air supply pipe 303; the connecting pipe 301 is fixedly connected to the support plate 2; one end of the connecting pipe 301 is connected to an external air supply device; the other end of the connecting pipe 301 is connected to the electrically controlled three-way valve 302; the electrically controlled three-way valve 302 is connected to the first air supply pipe 303; the first air supply pipe 303 is connected to four branch pipes 30301; each branch pipe 30301 is connected to the adjacent first air inlet 5002 and the second air inlet 6002.

[0021] Furthermore, to improve the bonding efficiency of the curved screen, the facing sides of the two first limiting plates 5 are arranged to be aligned with the outer edge of the curved frame 4001 , and the facing sides of the two second limiting plates 6 are arranged to be aligned with the outer edge of the straight frame 4002 .

[0022] Each first limiting plate 5 is provided with a first inclined surface 5003 ; each second limiting plate 6 is provided with a second inclined surface 6003 .

[0023] The left and right edges of the mobile phone frame 4 are curved frames 4001; the front and rear edges of the mobile phone frame 4 are straight frames 4002; the parts on the curved frame 4001 and the straight frame 4002 that need to be coated with glue are glue coating parts 4003; the process of coating the mobile phone frame 4 with hot melt glue is described in detail below: First, place the mobile phone frame 4 in the middle of the support plate 2. At this time, the mobile phone frame 4 is located between the two first limit plates 5 and between the two second limit plates 6. Then, control the third electric slider 207 to move downward on the third slide rail 206, thereby driving the glue dispenser 3 to move downward, so that the glue dispensing tube 3001 is aligned with the mobile phone frame 4, and there is a gap between the mobile phone frame 4 and the glue dispensing tube 3001. Then control the glue dispenser 3 to dispense glue. At the same time, control the first electric slider 202 to move forward and backward on the first slide rail 201, thereby driving the mobile phone frame 4 to move forward and backward, and control the second electric slider 204 to move left and right on the second slide rail 203, thereby driving the fixed plate 205 and its connecting parts and the glue dispenser 3 to move left and right, so that the glue dispenser 3 can sequentially apply hot melt glue to the glue coating parts 4003 on the curved frame 4001 and the straight frame 4002 in a circular manner. On this basis, when the hot melt glue is coated on the glue coating part 4003 of the curved frame 4001, A small amount of hot melt adhesive will overflow and diffuse along the curved surface, causing the hot melt adhesive to flow to the position of the mobile phone frame 4 where no hot melt adhesive is needed, resulting in the mobile phone frame 4 being contaminated and subsequent cleaning being difficult. For this reason, the electrically controlled three-way valve 302 is first controlled to connect the connecting pipe 301 with the first air supply pipe 303, and then the external air supply device is controlled to deliver a small and stable airflow to the connecting pipe 301, so that the airflow enters the first air supply pipe 303, and then the airflow enters the first exhaust groove 5001 through the first air inlet 5002, and finally the airflow is blown from the first exhaust groove 5001 to the surface of the curved frame 4001, thereby blowing the hot melt adhesive coated on the curved frame 4001 through the airflow, thereby delaying the overflow of the hot melt adhesive through the airflow to prevent it from spreading over a large area, causing the mobile phone frame 4 to be contaminated, and at the same time avoiding the hot melt adhesive from overflowing and dispersing downward, effectively improving the bonding effect on the curved screen, and when the hot melt adhesive coating is completed, the curved screen is manually attached to the mobile phone frame 4 to complete the assembly of the curved screen.

[0024] In the process of applying hot melt adhesive to the mobile phone frame 4, since the air may contain impurities such as dust, dust and impurities are easily attached to the surface of the hot melt adhesive when applying the adhesive, thereby reducing the tightness of the connection between the mobile phone frame 4 and the curved screen. For this reason, when the external air supply device delivers airflow to the connecting pipe 301, the airflow is blown toward the surfaces of the curved frame 4001 and the straight frame 4002 respectively and continuously to prevent impurities such as dust in the air from adhering to the hot melt adhesive, thereby avoiding the reduction of the viscosity of the hot melt adhesive due to the attachment of impurities.

[0025] Furthermore, when manually fitting the curved screen to the mobile phone frame 4, it is necessary to hold the mobile phone frame 4 in one hand and the curved screen in the other hand. In the process of aligning the curved screen with the mobile phone frame 4, due to the lack of positioning assistance, it is easy to cause the problem of inaccurate assembly misalignment, thereby reducing product quality. Therefore, by setting the facing sides of the two first limiting plates 5 to be aligned with the outer edge of the curved frame 4001, and setting the facing sides of the two second limiting plates 6 to be aligned with the outer edge of the straight frame 4002, when the hot melt adhesive is applied, the curved screen is placed between the two first limiting plates 5 and the two second limiting plates 6, so that the curved screen is located on the first inclined surface 5003 and the second inclined surface 6003, and the curved screen is guided to be aligned with the facing sides of the two first limiting plates 5 by the first inclined surface 5003, and the curved screen is guided to be aligned with the facing sides of the two second limiting plates 6 by the second inclined surface 6003, thereby The opposite sides of the curved screen are limited in left and right directions, so that the left and right sides of the curved screen are aligned with the sides of the curved frame 4001. At the same time, the front and rear directions of the curved screen are limited by the two second limiting plates 6, so that the front and rear sides of the curved screen are aligned with the straight frame 4002. Compared with the conventional bonding method, after the hot melt adhesive is applied, no additional alignment operation is required. The curved screen only needs to be placed between the first limiting plate 5 and the second limiting plate 6 to achieve rapid alignment of the curved screen, which greatly improves the speed of bonding the curved screen and improves the connection tightness between the curved screen and the mobile phone frame 4. In addition, by limiting the two first limiting plates 5 larger than the outer edge of the curved frame 4001, the mobile phone frame 4 is prevented from being displaced in the left and right directions. By limiting the outer edge of the two second limiting plates 6 and the straight frame 4002, the mobile phone frame 4 is prevented from being displaced in the front and rear directions, thereby preventing the mobile phone frame 4 from being displaced and causing assembly misalignment.

[0026] When the curved screen is attached, the external air supply device is controlled to continuously supply air to the connecting pipe 301, thereby accelerating the solidification of the hot melt adhesive between the curved screen and the mobile phone frame 4, thereby improving the installation efficiency of the curved screen. Example 2

[0027] On the basis of Example 1, Figure 1 , Figure 7 and Figure 8 As shown, the cleaning system includes a cleaning device 401; the cleaning device 401 and the water pipe 403 are fixedly connected to the support plate 2; a collecting chamber 40101 is provided in the cleaning device 401; the collecting chamber 40101 stores cleaning agent; the cleaning device 401 is connected to the water pipe 403; the water pipe 403 is connected to the external water supply equipment.

[0028] The cleaning system also includes a second air pipe 402; a cavity 40102 is opened in the cleaner 401; the second air pipe 402 is connected between the cavity 40102 and the electric-controlled three-way valve 302; a plurality of exhaust holes 40103 are opened on the wall of the cleaner 401; all the exhaust holes 40103 are connected to the cavity 40102.

[0029] Furthermore, in order to improve the heating and drying efficiency of the dispensing tube 3001, a plurality of exhaust holes 40103 are arranged in a ring shape.

[0030] Furthermore, in order to ensure that the dispensing tube 3001 is heated evenly, the shape of the cleaning device 401 is set to be circular.

[0031] The cleaning system further comprises a support rod 404 and a cover plate 405 ; two support rods 404 are fixedly connected to the cleaning device 401 ; a cover plate 405 is fixedly connected to the two support rods 404 ; a through hole 40501 is opened at the center of the cover plate 405 .

[0032] The support rod 404 is configured as a spring telescopic rod.

[0033] During the process of applying hot melt adhesive, there is a situation where colloid adheres to the outer surface of the glue dispensing tube 3001, or the hot melt adhesive solidifies and causes blockage in the glue dispensing tube 3001. The existing treatment method is usually to replace and clean the blocked glue dispensing tube 3001, which requires shutting down the glue dispensing machine. After replacing the glue dispensing tube 3001, the glue output needs to be readjusted, which affects the work efficiency. For this reason, when the equipment detects that the glue output of the glue dispensing tube 3001 is reduced, it can be judged that there is a blockage in the glue dispensing tube 3001. First, the external water supply equipment is controlled to transport the cleaning agent to the water pipe 403, so that the cleaning agent is stored in the lower part of the collection chamber 40101, and then the electric control valve between the glue dispenser 3 and the glue dispensing tube 3001 is closed, and then the first The second electric slider 204 drives the glue dispenser 3 to move to the left, and controls the first electric slider 202 to drive the support plate 2 to move backward, so that the glue dispensing tube 3001 moves to the top of the cleaning device 401, and then controls the third electric slider 207 to drive the glue dispenser 3 to move downward, so that the glue dispensing tube 3001 passes through the through hole 40501 and enters the upper half of the cleaning device 401. At this time, the exhaust holes 40103 are all aligned with the glue dispensing tube 3001, and then the connecting tube 301 is connected with the second air supply pipe 402 by controlling the electric three-way valve 302, and then the external air supply device is controlled to transport hot air to the connecting tube 301, so that the hot air flow passes through the second air supply pipe 402 into the cavity 40102, so that the hot air flow blows from the exhaust hole 40103 to the glue dispensing tube 3001, and the through hole 40501 is used to close the cleaning device 401. The superheated airflow heats the glue dispensing tube 3001, melts the solidified hot melt adhesive in the glue dispensing tube 3001, and accelerates the hot melt adhesive to flow out of the glue dispensing tube 3001, so as to clean the blocked glue dispensing tube 3001. In this process, the collecting chamber 40101 is blocked from the outside by the cover plate 405, so as to reduce the heat loss of the hot air flow, thereby improving the heating efficiency of the glue dispensing tube 3001. On this basis, by arranging the exhaust holes 40103 in a ring shape, the glue dispensing tube 3001 can be heated at 360° without dead ends, thereby improving the heating efficiency of the glue dispensing tube 3001. When the hot melt adhesive blocking the glue dispensing tube 3001 is melted, the third electric slider 207 is controlled to drive the glue dispensing tube 3001 to continue to move downward, so that the glue dispensing tube 3001 The cleaning agent is extended into the lower part of the collecting chamber 40101, and the hot melt adhesive attached to the surface of the dispensing tube 3001 and the hot melt adhesive solidified in the mouth of the dispensing tube 3001 are dissolved by the cleaning agent in the collecting chamber 40101, so as to realize the cleaning of the surface of the dispensing tube 3001. In this process, the dispensing device 3 presses the cover plate 405 downward, so that the support rod 404 is compressed. Since the support rod 404 adopts a spring telescopic rod, the support rod 404 is compressed, and the cover plate 405 and the dispensing device 3 move downward synchronously. When the surface of the dispensing tube 3001 is cleaned, the third electric slider 207 is controlled to drive the dispensing tube 3001 to move upward, so that the dispensing tube 3001 is located on the upper side of the cleaning device 401, and then the hot air flow is blown to the surface of the dispensing tube 3001.Thus, the surface of the dispensing tube 3001 is dried. When the dispensing tube 3001 is dried, the electric control valve between the dispensing device 3 and the dispensing tube 3001 is controlled to open, which is convenient for the subsequent dispensing of the dispensing tube 3001. Compared with the conventional replacement of the dispensing tube 3001, the solidified hot melt adhesive in the dispensing tube 3001 is heated and treated with a cleaning agent, so that the operation of replacing the dispensing tube 3001 is avoided, thereby avoiding the work of reciprocating shutdown and glue output adjustment, improving the efficiency of handling the blockage of the dispensing tube 3001, and reducing the workload of the staff in repairing the dispensing machine.

[0034] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hot melt glue coating machine for curved screen, comprising a glue dispenser and a moving component; the moving component is installed on the glue dispenser; a mobile phone frame (4) is placed on the glue dispenser; the left and right edges of the mobile phone frame (4) are curved frames (4001); the front and rear edges of the mobile phone frame (4) are straight frames (4002); the characteristics are: It also includes a first limit plate (5), a second limit plate (6), an air blowing assembly and a cleaning system; a first limit plate (5) is installed on the left and right sides of the glue dispensing machine to prevent the hot melt adhesive from flowing downward along the surface of the curved frame (4001); a first exhaust groove (5001) is arranged on the opposite sides of the two first limit plates (5); a first air inlet (5002) is opened on the opposite sides of the two first limit plates (5), and each first air inlet (5002) is connected to the adjacent first exhaust groove (5001); a second limit plate is installed on the front and rear sides of the glue dispensing machine (6); a second exhaust groove (6001) is provided on the opposite sides of the two second limit plates (6); a second air inlet (6002) is provided on the opposite sides of the two second limit plates (6), and each second air inlet (6002) is connected to the adjacent second exhaust groove (6001); an air blowing component for preventing hot melt adhesive from overflowing is installed on the glue dispensing machine; the air blowing component is connected to the external air supply device, and the air blowing component is connected to each first air inlet (5002) and each second air inlet (6002); the glue dispensing machine is connected to a cleaning system for preventing hot melt adhesive from clogging the glue dispensing machine.

2. The curved screen hot melt glue coating machine according to claim 1, characterized in that: The air blowing assembly comprises a connecting pipe (301), an electrically controlled three-way valve (302) and a first air supply pipe (303); the connecting pipe (301) is fixedly connected to the support plate (2); one end of the connecting pipe (301) is connected to an external air supply device; the other end of the connecting pipe (301) is connected to the electrically controlled three-way valve (302); the electrically controlled three-way valve (302) is connected to the first air supply pipe (303); the first air supply pipe (303) is connected to four branch pipes (30301); each branch pipe (30301) is connected to an adjacent first air inlet (5002) and a second air inlet (6002).

3. The curved screen hot melt glue coating machine according to claim 1, characterized in that: The facing sides of the two first limiting plates (5) are arranged to be aligned with the outer edge of the curved frame (4001), and the facing sides of the two second limiting plates (6) are arranged to be aligned with the outer edge of the straight frame (4002).

4. The curved screen hot melt glue coating machine according to claim 3, characterized in that: Each first limiting plate (5) is provided with a first inclined surface (5003); each second limiting plate (6) is provided with a second inclined surface (6003).

5. The curved screen hot melt glue coating machine according to claim 2, characterized in that: The cleaning system comprises a cleaning device (401); the cleaning device (401) and a water pipe (403) are fixedly connected to the support plate (2); a collecting chamber (40101) is provided in the cleaning device (401); a cleaning agent for cleaning residual glue on the glue dispensing tube (3001) is stored in the collecting chamber (40101); the cleaning device (401) is connected to the water pipe (403); and the water pipe (403) is connected to an external water supply device.

6. The curved screen hot melt glue coating machine according to claim 5, characterized in that: The cleaning system further comprises a second air supply pipe (402); a cavity (40102) is provided in the cleaning device (401); the second air supply pipe (402) is connected between the cavity (40102) and the electric-controlled three-way valve (302); a plurality of exhaust holes (40103) are provided on the wall of the cleaning device (401); and all the exhaust holes (40103) are connected to the cavity (40102).

7. The curved screen hot melt glue coating machine according to claim 6, characterized in that: A plurality of exhaust holes (40103) are arranged in a ring shape.

8. The curved screen hot melt glue coating machine according to claim 6, characterized in that: The shape of the cleaning device (401) is set to be circular.

9. The curved screen hot melt glue coating machine according to claim 8, characterized in that: The cleaning system further comprises a support rod (404) and a cover plate (405); a plurality of support rods (404) are fixedly connected to the cleaning device (401); a cover plate (405) is commonly fixedly connected to the plurality of support rods (404); and a through hole (40501) is provided at the center of the cover plate (405).

10. The curved screen hot melt glue coating machine according to claim 9, characterized in that: The support rod (404) is configured as a spring telescopic rod.

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